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HomeMy WebLinkAboutMisc - 2 of 2Print Form Reset Form Save Form DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT CITYOF &A -------Renton~ DENSITY WORKSHEET 1. 2. 3. 4. 5. 6. Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Gross area of property 39,187 Deductions: Certain areas are excluded from density calculations. These include: Public Streets* 1,943 square feet Private access easements* 0 square feet Critical Areas** 0 square feet Total excluded area: 1,943 Subtract line 2 (total excluded area) from line 1 for net area 37,244 Divide line 3 by 43,560 for net acreage 0.8550 Number of dwelling units or lots planned 15 Divide line 5 by line 4 for net density 17.5438 *Alleys (public or private) do not have to be excluded. square feet square feet square feet acres units/lots = dwelling units/acre **Critical Areas are defined as "Areas determined by the City to be not suitable far development and which are subject to the City's Critical Areas Regulations including very high landslide areas, protected slopes, wetlands, or floodways." Critical Areas buffers are not deducted/excluded. 1 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\density.doc Rev:08/2015 Print Form Reset Form Save Form DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT R CITY OF I':::\. --------enton~ DENSITY WORKSHEET 1. 2. 3. 4. 5. 6. Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Gross area of property 39,187 Deductions: Certain areas are excluded from density calculations. These include: Public Streets* 1,943 square feet Private access easements* 0 square feet Critical Areas** 0 square feet Tota I excluded area: 1,943 Subtract line 2 (total excluded area) from line 1 for net area 37,244 Divide line 3 by 43,560 for net acreage 0.8550 Number of dwelling units or lots planned 15 Divide line 5 by line 4 for net density 17.5438 *Alleys (public or private) do not have to be excluded. square feet square feet square feet acres units/lots = dwelling units/acre **Critical Areas are defined as "Areas determined by the City to be not suitable for development and which are subject to the City's Critical Areas Regulations including very high landslide areas, protected slopes, wetlands, or floodways." Critical Areas buffers are not deducted/excluded. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\density.doc Rev: 08/2015 Print Form Reset Form Save Form DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT -------Renton 0 DENSITY WORKSHEET 1. 2. 3. 4. 5. 6. Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Gross area of property 39,187 Deductions: Certain areas are excluded from density calculations. These include: Public Streets* 1,943 square feet Private access easements* 0 square feet Critical Areas** 0 square feet Total excluded area: 1,943 Subtract line 2 (total excluded area) from line 1 for net area 37,244 Divide line 3 by 43,560 for net acreage 0.8550 Number of dwelling units or lots planned 15 Divide line 5 by line 4 for net density 17.5438 *Alleys (public or private) do not have to be excluded. square feet square feet square feet acres units/lots = dwelling units/acre **Critical Areas are defined as "Areas determined by the City to be not suitable for development and which are subject to the City's Critical Areas Regulations including very high landslide areas, protected slopes, wetlands, or floodways." Critical Areas buffers are not deducted/excluded. 1 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Pla nning\density .doc Rev:08/2015 Print Form Reset Form Save Form DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT ---------Renton e DENSITY WORKSHEET 1. 2. 3. 4. 5. 6. Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Gross area of property 39,187 Deductions: Certain areas are excluded from density calculations. These include: Public Streets* 1,943 square feet Private access easements* 0 square feet Critical Areas** 0 square feet Total excluded area: 1,943 Subtract line 2 (total excluded area) from line 1 for net area 37,244 Divide line 3 by 43,560 for net acreage 0.8550 Number of dwelling units or lots planned 15 Divide line 5 by line 4 for net density 17.5438 *Alleys (public or private) do not have to be excluded. square feet square feet square feet acres units/lots = dwelling units/acre **Critical Areas are defined as "Areas determined by the City to be not suitable for development and which are subject to the City's Critical Areas Regulations including very high landslide areas, protected slopes, wetlands, or floodways." Critical Areas buffers are not deducted/excluded. 1 H:\CED\Data\forms-Templates\Self-Help Handouts\Planning\density.doc Rev: 08/2015 Print Form Reset Form Save Form DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT --------Renton® DENSITY WORKSHEET Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov 1. Gross area of property 39,187 ------- 2. Deductions: Certain areas are excluded from density calculations. These include: Public Streets* Private access easements* Critical Areas** Total excluded area: 1,943 square feet ------ 0 square feet ------ 0 square feet ------ 1,943 ------- 3. Subtract line 2 (total excluded area) from line 1 for 37,244 net area ------- 4. Divide line 3 by 43,SGO for net acreage 0.8550 ------- 5. Number of dwelling units or lots planned 15 ------- 6. Divide line 5 by line 4 for net density 17.5438 ------- *Alleys (public or private) do not have to be excluded. square feet square feet square feet acres units/lots = dwelling units/acre **Critical Areas are defined as "Areas determined by the City to be not suitable for development and which are subject to the City's Critical Areas Regulations including very high landslide areas, protected slopes, wetlands, or floodways." Critical Areas buffers are not deducted/excluded. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\density.doc Rev: 08/2015 Print Form Reset Form Save Form DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT --------Ren ton 0 DENSITY WORKSHEET 1. 2. 3. 4. 5. 6. Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Gross area of property 39,187 Deductions: Certain areas are excluded from density calculations. These include: Public Streets* 1,943 square feet Private access easements* 0 square feet Critical Areas** 0 square feet Total excluded area: 1,943 Subtract line 2 (total excluded area) from line 1 for net area 37,244 Divide line 3 by 43,560 for net acreage 0.8550 Number of dwelling units or lots planned 15 Divide line 5 by line 4 for net density 17.5438 *Alleys (public or private) do not have to be excluded. square feet square feet square feet acres units/lots = dwelling units/acre **Critical Areas are defined as "Areas determined by the City to be not suitable for development and which are subject to the City's Critical Areas Regulations including very high landslide areas, protected slopes, wetlands, or floodways." Critical Areas buffers are not deducted/excluded. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Pla nning\density .doc Rev:08/2015 Print Form Reset Form Save Form DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT --------Ren ton® DENSITY WORKSHEET 1. 2. 3. 4. 5. 6. Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Gross area of property 39,187 Deductions: Certain areas are excluded from density calculations. These include: Public Streets* 1,943 square feet Private access easements* 0 square feet Critical Areas** 0 square feet Total excluded area: 1,943 Subtract line 2 (total excluded area} from line 1 for net area 37,244 Divide line 3 by 43,560 for net acreage 0.8550 Number of dwelling units or lots planned 15 Divide line 5 by line 4 for net density 17.5438 *Alleys (public or private) do not have to be excluded. square feet square feet square feet acres units/lots = dwelling units/acre **Critical Areas are defined as "Areas determined by the City to be not suitable for development and which are subject to the City's Critical Areas Regulations including very high landslide areas, protected slopes, wetlands, or floodways." Critical Areas buffers are not deducted/excluded. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\density.doc Rev:08/2015 Print Form Reset Form Save Form DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT S CITYOF 0 -------Renton~ DENSITY WORKSHEET 1. 2. 3. 4. 5. 6. Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Gross area of property 39,187 Deductions: Certain areas are excluded from density calculations. These include: Public Streets* 1,943 square feet Private access easements* 0 square feet Critical Areas** 0 square feet Total excluded area: 1,943 Subtract line 2 (total excluded area} from line 1 for net area 37,244 Divide line 3 by 43,560 for net acreage 0.8550 Number of dwelling units or lots planned 15 Divide line 5 by line 4 for net density 17.5438 *Alleys (public or private) do not have to be excluded. square feet square feet square feet acres units/lots = dwelling units/acre **Critical Areas are defined as "Areas determined by the City ta be not suitable for development and which are subject ta the City's Critical Areas Regulations including very high landslide areas, protected slopes, wetlands, or floodways. 11 Critical Areas buffers are not deducted/excluded. 1 H:\CED\Data\forms-Templates\Self-Help Handouts\Planning\density.doc Rev: 08/2015 Print Form Reset Form Save form DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT -----~Renton® DENSITY WORKSHEET 1. 2. 3. 4. 5. 6. Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Gross area of property 39,187 Deductions: Certain areas are excluded from density calculations. These include: Public Streets* 1,943 square feet Private access easements* 0 square feet Critical Areas** 0 square feet Total excluded area: 1,943 Subtract line 2 (total excluded area) from line l for net area 37,244 Divide line 3 by 43,560 for net acreage 0.8550 Number of dwelling units or lots planned 15 Divide line 5 by line 4 for net density 17.5438 *Alleys (public or private) do not have to be excluded. square feet square feet square feet acres units/lots = dwelling units/acre **Critical Areas are defined as "Areas determined by the City to be not suitable for development and which are subject to the City's Critical Areas Regulations including very high landslide areas, protected slopes, wetlands, or f/oodways." Critical Areas buffers are not deducted/excluded. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\density.doc Rev: 08/2015 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT -------Renton 0 ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. INSTRUCTIONS FOR APPLICANTS: U:!fill:l] This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use "not applicable" or "does not apply'' only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. INSTRUCTIONS FOR LEAD AGENCIES: Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 USE OF CHECKLIST FOR NONPROJECT PROPOSALS:~ For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B even though questions may be answered "does not apply". In addition the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words "project", "applicant", and "property or site" should be read as "proposal", "proponent", and "affected geographic area" respectively. The lead agency may exclude (for non-projects) questions in Part B -Environmental Elements -that do not contribute meaningfully to the analysis of the proposal. For help go to: http://www.ecv.wa.gov/programs/sea/sepa/e-review.html A. BACKGROUND~ 1. Name of proposed project, if applicable: ~ Sunset's Edge Townhomes 2. Name of applicant: ~ Citizen Design Collaborative (Primary Contact) Tottenham, LLC (Owner) 3. Address and phone number of applicant and contact person:~ Jacob Young Citizen Design Collaborative 46 Etruria Street, Suite 201 Seattle, WA 98109 206.853.8055 4. Date checklist prepared:~ October 27, 2016 Revised: January 27, 2017 S. Agency requesting checklist: ~ Joe Notarangelo Tottenham, LLC 50 116th Ave SE, Suite 111 Bellevue, WA 98004 Renton Department of Planning and Development 6. Proposed timing or schedule (including phasing, if applicable):~ The proposal is intended for completion in the fall of 2018. 2 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. ~ No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. ~ Geotechnical Report and Topographic Survey: E3RA, Inc. PO Box 44840 Tacoma, WA 98448 Arborist's Report: Arborists NW 1710 SW 318th Place #44D Federal Way, WA 98023 Drainage Report: Duncanson Company, Inc. 145 SW 155th St, Ste 102 Seattle, WA 98166 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain.~ No. 10. List any government approvals or permits that will be needed for your proposal, if known. ~ Planned Urban Development Permit City of Renton Building Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) ~ Construct 15 townhomes ranging in size from 1000 sf to 1800 sf under a Planned Urban Development. Four townhome plans are proposed. Additional improvements to the site include subgrade utility installation, driveways, a woonerf, landscaping, pedestrian pathways and retaining walls. Zoning for this site is RMF. An unregulated, artificial steep slope is located on site. Street frontage improvements to be constructed include sidewalks, planter strips, and concrete curbs and gutters. The project site is composed of three legal lots. All three lots are currently undeveloped. At the conclusion of construction, a full plat will be performed to create fee simple lots and common tracts. 3 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 12. Location ofthe proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist.1h!tlJ:1} 701-707 Sunset Boulevard NE Renton, WA 98056 Situate in NE 8-23-5, WM Legal description is located on survey. sheet SV1 B. ENVIRONMENTAL ELEMENTS 1h!tlJ:1l 1. EARTH a. General description of the site 1h!tlJ:1} (check or circle one): Flat, rolling, hilly, "'steep slopes, mountainous, other~~~~~~ b. What is the steepest slope on the site (approximate percent slope)? 1h!tlJ:1} -64% (artificial slope) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils.1h!tlJ:1} 6" surface mantle (sod, topsoil, and/or gravel surfacing) 4-1/2 ft fill zone (silty sand with woody debris and general refuse) Native glacial till deposits (gravelly, silty sand) Refer to attached geotechnical report for additional information. 4 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. [llitlQ] None. Refer to geotechnical report for additional details. e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill. [llitlQ] Excavation and fill to take place throughout portions of site proposed for development to provide level building sites and remove incompetent soil. Approximately 75% of the lot will be regraded to provide for building sites, access driveways, common open space and parking areas. Structural fill to be imported as necessary, and incompetent soils to be exported as necessary. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. [llitlQ] Possibility of erosion during construction due to earthwork grading required by this project. Once construction is complete and pem,anent landscape plantings are established, erosion risks are expected to be approximately equivalent to those of the undeveloped site or better. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? [llitlQ] -65.4% impervious surface h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: 2. AIR [llitlQ] Project will be designed and constructed in accordance with the standards and requirements of the City of Renton and recognized Best Management Practices. Silt fences, sheet plastic coverings for exposed slopes, tree protection and stabilized construction entrances will be used to minimize potential erosion. a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. [llitlQ] Emissions due to standard construction activity are expected. No emissions are anticipated after the completion of construction. 5 H :\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. Ihlilll1 None are known. c. Proposed measures to reduce or control emissions or other impacts to air, if any: l!1lilll1 N/A 3. WATER a. Surface Water: Ihlilll1 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. Ihlilll1 No. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. Ihlilll1 N/A 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. Ihlilll1 N/A 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. Ihlilll1 N/A 6 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. [bg!Q} No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. [bg!Q} No. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. [bg!Q} No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals. ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. [bg!Q} None anticipated. c. Water runoff (including stormwater): 7 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. lbmm Runoff is expected from roof area and impervious surfacing for driveways and pedestrian paths. Runoff will be collected and routed to a detention system. No runoff is expected to flow into other surface waters. Refer to drainage report for additional information. 2) Could waste materials enter ground or surface waters? If so, generally describe. lbmm None anticipated. 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. As noted above, drainage will be routed to a detention system. No alteration to the drainage patterns of neighboring sites is anticipated. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: All runoff water will be routed to a subgrade detention tank on the site via a piped storm drainage system. The tank will drain to a 12" outflow at the western margin of the parcel. No groundwater seepage is anticipated. 4. PLANTS l!l!ill21 a. Check the types of vegetation found on the site: l!l!ill21 V deciduous tree: alder, maple, aspen, other -;;;, evergreen tree: fir, cedar, pine, other ~shrubs V grass __ pasture __ crop or grain __ orchards, vineyards or other permanent crops. __ wet soil plants: cattail, buttercup, bull rush, skunk cabbage, other 8 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 __ water plants: water lily, eelgrass, milfoil, other __ other types of vegetation b. What kind and amount of vegetation will be removed or altered?~ Trees located within the footprints of proposed structures or impervious areas will be removed. Trees that cannot retained due to proximity to proposed structures will also be removed. Shrubs, grass and other vegetation will be removed throughout the area of work. c. List threatened and endangered species known to be on or near the site.~ None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any:~ Proposed landscaping to utilize native plants and drought-tolerant design. Existing trees to be protected and retained when possible. Refer to landscape design documents for additional information. e. List all noxious weeds and invasive species known to be on or near the site. None known. 5. ANIMALS a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. Examples include:~ Birds: hawk, heron, eagle, songbirds, other: ___________ _ Mammals: deer, bear, elk, beaver, other:------------- Fish: bass, salmon, trout, herring, shellfish, other _________ _ b. List any threatened and endangered species known to be on or near the site. ~ None known. 9 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. Is the site part of a migration route? If so, explain.~ No. d. Proposed measures to preserve or enhance wildlife, if any:~ None proposed. e. List any invasive animal species known to be on or near the site. None known. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc.~ Electric energy will be used for all heating, cooling and domestic cooking needs of the development. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe.~ It is not anticipated that the proposed structures will shade neighboring parcels. Sight-obscuring vegetation planted along the northerly boundary of the parcel will shade the southern portions of the northerly neighbor. It is expected that the most substantial shading will occur during summer months. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any:~ The project will be constructed to the standards of BuiltGreen (rating unconfirmed). This could include highly efficient building equipment and appliances, increased envelope R-ratings, and material selections lower in embodied energy than used in conventional construction. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe.~ None anticipated. 10 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe any known or possible contamination at the site from present or past uses. None anticipated. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. None known. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. None anticipated. 4) Describe special emergency services that might be required. None anticipated. 5) Proposed measures to reduce or control environmental health hazards, if any: It is not anticipated that any will be required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? llli1!Q} The site is located adjacent to Interstate 405, a significant source of traffic noise. Airplane traffic is also a source of noise throughout the area. 11 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. I!N!Q} Typical construction noise would be produced on site during the construction of the project. Construction noise would be produced during work hours (7:30am -6pm, Monday through Friday). 3) Proposed measures to reduce or control noise impacts, if any: I!N!Q} Construction activities will be limited to typical work hours (8am -5pm, Monday through Friday). A vegetated buffer is also provided between the development and 1-405. Overhead noise is to be mitigated through the provision of insulated roofs. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe. I!N!Q} The site is undeveloped land with gravel surfacing near Sunset Boulevard NE. The sloped portion of the site is vegetated. The adjacent properties include multifamily residential, single family residential, undeveloped land, city right-of-way and an Interstate highway. It is not anticipated that the proposal will adversely affect current land uses on surround properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or non-forest use? I!N!Q} The site has not been used as working farmlands or working forest lands. 1) Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No working farm or forest lands are nearby. c. Describe any structures on the site. I!N!Q} None present. 12 H :\CED\Oata\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Will any structures be demolished? If so, what?~ None present. e. What is the current zoning classification of the site?~ Residential -Multifamily (RMF) Density limited to 20 dwelling units per acre before bonuses are applied. f. What is the current comprehensive plan designation of the site?~ Residential High Density (RHD) g. If applicable, what is the current shoreline master program designation of the site?~ N/A h. Has any part of the site been classified as a critical area by the city or county? If so, specify.~ Per GIS mapping, a portion of the site has been classified as a steep slope critical area. However, it has been established by the project and city geotechnical engineers that this slope is artificial and therefore not regulated. Refer to the survey and geotechnical report for additional information. i. Approximately how many people would reside or work in the completed project?~ 15 -38 persons j. Approximately how many people would the completed project displace?~ None. k. Proposed measures to avoid or reduce displacement impacts, if any:~ N/A I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: ~ Townhouse developments are permitted outright in the RMF zone. The RHD Comprehensive Plan designation also states that developments with that designation should incorporate features of both single family and multifamily housing, facilitate infill development, and efficiently use urban services and infrastructure. By locating multiple townhouse structures around a single access point, responding architecturally to traditional forms and providing utility infrastructure, the project meets these standards. 13 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 m. Proposed measures to ensure the proposal is compatible with nearby agricultural and forest lands of long-term commercial significance, if any: N/A 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. [bmQ] 15 units of middle income housing will be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. [bmQ] None. c. Proposed measures to reduce or control housing impacts, if any: [bmQ] No adverse impacts to housing availability or cost are anticipated. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? (bmQ] -36ft to peak of highest roof. Principal exterior building materials include standing seam metal and cement fiberboard. b. What views in the immediate vicinity would be altered or obstructed? [bmQ] Territorial views from properties to the east and north would be altered by this development. It is not anticipated that any views would be fully blocked. c. Proposed measures to reduce or control aesthetic impacts, if any: (bmQ] The site is terraced to reduce the apparent height and bulk of the townhomes. Vegetated buffers are also provided along the north and south property boundaries. Finally, the architectural massing of the development is designed to respond to and reinterpret traditional urban forms found throughout the area. 14 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? [bfilQ] It is expected that interior lighting will be visible through windows during early evening and morning hours. Exterior lighting in this development is minimal and decorative only. Reflections may be produced by window glazing under certain weather conditions, but no mirror glass is proposed. b. Could light or glare from the finished project be a safety hazard or interfere with views? [bfilQ] It is not expected that light or glare from the proposed project will be a safety hazard or interfere with views. c. What existing off-site sources of light or glare may affect your proposal? [bfilQ] An existing street light is located in the right-of-way near the project site. This light will be relocated and is expected to remain near the project site. Other nearby light sources include the multifamily developments and single-family residences to the north and east. It is not anticipated that these light sources will negatively impact the project. d. Proposed measures to reduce or control light and glare impacts, if any: [bfilQ] All exterior lighting fixtures will be directed downward and shielded to minimize light pollution. No site lighting is proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? [bfilQ] The nearest public open space and recreational facilities appear to be located at Highlands Elementary School, approximately half a mile from the site. Windsor Hills Park is located approximately one mile away. Neighbors have also expressed that the vegetated area between the project site and Interstate 405 is often used as an informal recreational area. b. Would the proposed project displace any existing recreational uses? If so, describe. [bfilQ] No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: [bfilQ] The project proposal includes a children's play area, common open space with seating and private yards for some units. All units are also provided with balconies and decks. 15 H :\CED\Data\Forms-T emplates\Self-Help Handouts\Plan ning\envchecklist.doc Rev:08/2015 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers located on or near the site? If so, specifically describe. IllitlQ} No. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Is there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources. IllitlQ} No landmarks or material evidence of archaeological significance have been observed. c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc. IllitlQ} The WISAARD database has been consulted. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. No cultural resources have been located on the project site. 14. TRANSPORTATION a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any. IllitlQ} The site is served by Sunset Boulevard NE. It also abuts, but is not served by, Interstate 405. Access to Sunset Boulevard is provided by a single curb cut as shown on the site plan. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop? IllitlQ} No transit currently serves the immediate area of the project site. The nearest transit stop is located at the intersection of NE 7th Street and Edmonds Avenue NE, approximately a quarter mile away. 16 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate? 1tlli]Q} 31 new parking spaces will be provided. The site is currently undeveloped, and no parking spaces will be removed. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways? If so, generally describe (indicate whether public or private).1tlli]Q} A new private woonerf is proposed as part of the project. The project also proposes to dedicate a 9'-6" strip of land along Sunset Boulevard NE for road purposes and install frontage improvements such as a curb and gutter, sidewalk, planter strip and street trees. e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. lillili2l. Generally, no. Due to the location of Boeing's facilities and Sea-Tac International Airport, air transportation occurs throughout the Renton area. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and non-passenger vehicles). What data or transportation models were used to make these estimates? 1tlli]Q} Traffic analysis has been waived by the project's assigned planner. Trips per day have not been calculated. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. No such traffic exists on streets in the area. h. Proposed measures to reduce or control transportation impacts, if any: 1tlli]Q} As noted above, street dedication and frontage improvement is proposed. The project also proposes surface parking in addition to the dedicated garages to provide off-street parking for the use of guests, delivery vehicles, etc. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe.1tlli]Q} 17 H :\CED\Data\Forms-Templates\Self-Help Handouts\Plan ning\envchecklist.doc Rev: 08/2015 The proposed project would increase the population of the immediate area, creating a potential increase in the need for public services. Schools, emergency services, fire and police protection. and utilities are all expected to be impacted. Due to the amount of parking provided, it is anticipated that a greater impact will be made on road infrastructure than on public transit. b. Proposed measures to reduce or control direct impacts on public services, if any . .l!:!filQ) The proposed project will be designed to incorporate emergency vehicle access to all portions of the site. Impact fees will also be paid as required by the City of Renton. 16. UTILITIES a. Check or circle utilities currently available at the site:.l!:!filQ) V natural gas, Stubs only . .../ electricity, } .../ water, .../ refuse service, telephone, V sanitary sewer, Stub only. septic system, other ______________ _ b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. Ih@!Q] As the site is undeveloped, no utility service lines are currently available. The project proposes to construct utilities as shown on the civil site plan. Utilities constructed shall include a water main extension and services, sanitary side sewers. storm drainage collection and detention, electrical services and communication services. Utilities shall be constructed as extensions of publicly-owned and franchise-operated systems, and a utility easement shall be provided as required by utility operators and/or the City of Renton. C. SIGNATURE Ih@!Q] The above answers are true and complete to the best of lead agency is relying on them to make its decision. Position and Agency/Organization: Project Applicant, Citizen Design Collaborative Date Submitted: ....:::.01.:.ci.::.27'-'i.::.20"-1'-'7 _____ _ 18 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT -------Renton 0 ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. INSTRUCTIONS FOR APPLICANTS:~ This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use "not applicable" or "does not apply" only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. INSTRUCTIONS FOR LEAD AGENCIES: Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 USE OF CHECKLIST FOR NONPROJECT PROPOSALS:~ For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B even though questions may be answered "does not apply". In addition the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words "project", "applicant", and "property or site" should be read as "proposal", "proponent", and "affected geographic area" respectively. The lead agency may exclude (for non-projects) questions in Part B -Environmental Elements -that do not contribute meaningfully to the analysis of the proposal. For help go to: http:ljwww.ecy.wa.gov/programs/sea/sepa/e-review.html A. BACKGROUND~ 1. Name of proposed project, if applicable: ~ Sunset's Edge Townhomes 2. Name of applicant:~ Citizen Design Collaborative (Primary Contact) Tottenham, LLC (Owner) 3. Address and phone number of applicant and contact person:~ Jacob Young Citizen Design Collaborative 46 Etruria Street, Suite 201 Seattle, WA 98109 206.853.8055 4. Date checklist prepared:~ October 27, 2016 Revised: January 27, 2017 S. Agency requesting checklist:~ Joe Notarangelo Tottenham, LLC 50 116th Ave SE, Suite 111 Bellevue, WA 98004 Renton Department of Planning and Development 6. Proposed timing or schedule (including phasing, if applicable):~ The proposal is intended for completion in the fall of 2018. 2 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. lbfilQJ No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. [bfilQJ Geotechnical Report and Topographic Survey: E3RA, Inc. PO Box44840 Tacoma, WA 98448 Arborist's Report: Arborists NW 1710 SW 318th Place #440 Federal Way, WA 98023 Drainage Report: Duncanson Company, Inc. 145 SW 155th St, Ste 1 02 Seattle, WA 98166 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. lbfilQJ No. 10. List any government approvals or permits that will be needed for your proposal, if known. lbfilQ1 Planned Urban Development Permit City of Renton Building Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) lbfilQ1 Construct 15 townhomes ranging in size from 1000 sf to 1800 sf under a Planned Urban Development. Four townhome plans are proposed. Additional improvements to the site include subgrade utility installation, driveways, a woonerf, landscaping, pedestrian pathways and retaining walls. Zoning for this site is RMF. An unregulated, artificial steep slope is located on site. Street frontage improvements to be constructed include sidewalks, planter strips, and concrete curbs and gutters. The project site is composed of three legal lots. All three lots are currently undeveloped. At the conclusion of construction, a full plat will be performed to create fee simple lots and common tracts. 3 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. [hfilQ} 701-707 Sunset Boulevard NE Renton, WA 98056 Situate in NE 8-23-5, WM Legal description is located on survey, sheet SV1 8. ENVIRONMENTAL ELEMENTS [hfilQ} 1. EARTH a. General description of the site [hfilQ} (check or circle one): Flat, rolling, hilly, "'steep slopes, mountainous, other~~~~~~ b. What is the steepest slope on the site (approximate percent slope)? [hfilQ} -64 % ( artificial slope) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils. [hfilQ} 6" surface mantle (sod, topsoil, and/or gravel surfacing) 4-1/2 ft fill zone (silty sand with woody debris and general refuse) Native glacial till deposits (gravelly, silty sand) Refer to attached geotechnical report for additional information. 4 H :\CED\Oata\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/201S d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. lbfilQ] None. Refer to geotechnical report for additional details. e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill. lbfilQ] Excavation and fill to take place throughout portions of site proposed for development to provide level building sites and remove incompetent soil. Approximately 75% of the lot will be regraded to provide for building sites, access driveways, common open space and parking areas. Structural fill to be imported as necessary, and incompetent soils to be exported as necessary. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. lbfilQ] Possibility of erosion during construction due to earthwork grading required by this project. Once construction is complete and permanent landscape plantings are established, erosion risks are expected to be approximately equivalent to those of the undeveloped site or better. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? lbfilQ] -65.4% impervious surface h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: 2. AIR lbfilQ] Project will be designed and constructed in accordance with the standards and requirements of the City of Renton and recognized Best Management Practices. Silt fences, sheet plastic coverings for exposed slopes, tree protection and stabilized construction entrances will be used to minimize potential erosion. a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. lbfilQ] Emissions due to standard construction activity are expected. No emissions are anticipated after the completion of construction. 5 H:\CEO\Data\forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. D:!mQ} None are known. c. Proposed measures to reduce or control emissions or other impacts to air, if any: D:!mQ} N/A 3. WATER a. Surface Water: D:!mQ} 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. D:!mQ} No. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. D:!mQ} NIA 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. D:!mQ} N/A 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. D:!mQ} N/A 6 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.~ No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. ~ No. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known.~ No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals. ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve.~ None anticipated. c. Water runoff (including stormwater): 7 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1} Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. I!N!Q} Runoff is expected from roof area and impervious surfacing for driveways and pedestrian paths. Runoff will be collected and routed to a detention system. No runoff is expected to flow into other surface waters. Refer to drainage report for additional information. 2} Could waste materials enter ground or surface waters? If so, generally describe. I!N!Q} None anticipated. 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. As noted above, drainage will be routed to a detention system. No alteration to the drainage patterns of neighboring sites is anticipated. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: All runoff water will be routed to a subgrade detention tank on the site via a piped storm drainage system. The tank will drain to a 12" outflow at the western margin of the parcel. No groundwater seepage is anticipated. 4. PLANTS I!N!Q} a. Check the types of vegetation found on the site: I!N!Q} .../ deciduous tree: alder, maple, aspen, other ~ evergreen tree: fir, cedar, pine, other ~shrubs <../ grass _pasture __ crop or grain __ orchards, vineyards or other permanent crops. __ wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other 8 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 __ water plants: water lily, eelgrass, milfoil, other __ other types of vegetation b. What kind and amount of vegetation will be removed or altered?~ Trees located within the footprints of proposed structures or impervious areas will be removed. Trees that cannot retained due to proximity to proposed structures will also be removed. Shrubs, grass and other vegetation will be removed throughout the area of work. c. List threatened and endangered species known to be on or near the site. ~ None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any:~ Proposed landscaping to utilize native plants and drought-tolerant design. Existing trees to be protected and retained when possible. Refer to landscape design documents for additional information. e. List all noxious weeds and invasive species known to be on or near the site. None known. 5. ANIMALS a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. Examples include:~ Birds: hawk, heron, eagle, songbirds, other: ___________ _ Mammals: deer, bear, elk, beaver, other: ____________ _ Fish: bass, salmon, trout, herring, shellfish, other---------- b. List any threatened and endangered species known to be on or near the site. ~ None known. 9 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. Is the site part of a migration route? If so, explain.~ No. d. Proposed measures to preserve or enhance wildlife, if any: ~ None proposed. e. List any invasive animal species known to be on or near the site. None known. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc.~ Electric energy will be used for all heating, cooling and domestic cooking needs of the development. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe.~ It is not anticipated that the proposed structures will shade neighboring parcels. Sight-obscuring vegetation planted along the northerly boundary of the parcel will shade the southern portions of the northerly neighbor. It is expected that the most substantial shading will occur during summer months. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: ~ The project will be constructed to the standards of BuiltGreen (rating unconfirmed). This could include highly efficient building equipment and appliances, increased envelope R-ratings, and material selections lower in embodied energy than used in conventional construction. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe.~ None anticipated. 10 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe any known or possible contamination at the site from present or past uses. None anticipated. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. None known. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. None anticipated. 4) Describe special emergency services that might be required. None anticipated. 5) Proposed measures to reduce or control environmental health hazards, if any: It is not anticipated that any will be required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? Irul1Q] The site is located adjacent to Interstate 405, a significant source of traffic noise. Airplane traffic is also a source of noise throughout the area. 11 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. [llitlQ] Typical construction noise would be produced on site during the construction of the project. Construction noise would be produced during work hours (7:30am -6pm, Monday through Friday). 3) Proposed measures to reduce or control noise impacts, if any: (llitlQ] Construction activities will be limited to typical work hours (8am -5pm, Monday through Friday). A vegetated buffer is also provided between the development and 1-405. Overhead noise is to be mitigated through the provision of insulated roofs. 8. LAND AND SHORELINE USE a. What is the current use ofthe site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe. (llitlQ] The site is undeveloped land with gravel surfacing near Sunset Boulevard NE. The sloped portion of the site is vegetated. The adjacent properties include multifamily residential, single family residential, undeveloped land, city right-of-way and an Interstate highway. It is not anticipated that the proposal will adversely affect current land uses on surround properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or non-forest use? [llitlQ] The site has not been used as working farmlands or working forest lands. 1) Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No working farm or forest lands are nearby. c. Describe any structures on the site. [llitlQ] None present. 12 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Will any structures be demolished? If so, what? [bgjQ] None present. e. What is the current zoning classification of the site? 1bfilQ] Residential -Multifamily (RMF) Density limited to 20 dwelling units per acre before bonuses are applied. f. What is the current comprehensive plan designation of the site? [bgjQ] Residential High Density (RHO) g. If applicable, what is the current shoreline master program designation of the site? [bgjQ] NIA h. Has any part of the site been classified as a critical area by the city or county? If so, specify. Ib.filQl Per GIS mapping, a portion of the site has been classified as a steep slope critical area. However, it has been established by the project and city geotechnical engineers that this slope is artificial and therefore not regulated. Refer to the survey and geotechnical report for additional information. i. Approximately how many people would reside or work in the completed project? Ib.filQl 15 -38 persons j. Approximately how many people would the completed project displace? [bg)Q] None. k. Proposed measures to avoid or reduce displacement impacts, if any: Ib.filQ} N/A I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: Ib.filQl Townhouse developments are permitted outright in the RMF zone. The RHO Comprehensive Plan designation also states that developments with that designation should incorporate features of both single family and multifamily housing, facilitate infill development. and efficiently use urban services and infrastructure. By locating multiple townhouse structures around a single access point, responding architecturally to traditional forms and providing utility infrastructure, the project meets these standards. 13 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 m. Proposed measures to ensure the proposal is compatible with nearby agricultural and forest lands of long-term commercial significance, if any: NIA 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing.~ 15 units of middle income housing will be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing.~ None. c. Proposed measures to reduce or control housing impacts, if any:~ No adverse impacts to housing availability or cost are anticipated. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; hat is the principal exterior building material(s) proposed?~ -36ft to peak of highest roof. Principal exterior building materials include standing seam metal and cement fiberboard. b. What views in the immediate vicinity would be altered or obstructed?~ Territorial views from properties to the east and north would be altered by this devel pment. It is not anticipated that any views would be fully blocked. c. Proposed measures to reduce or control aesthetic impacts, if any: ~ The site is terraced to reduce the apparent height and bulk of the townhomes. Vege ted buffers are also provided along the north and south property boundaries. Finally, the architectural massing of the development is designed to respond to and reinterpret t aditional urban forms found throughout the area. 14 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? IlN!Ql It is expected that interior lighting will be visible through windows during early evening and morning hours. Exterior lighting in this development is minimal and decorative only. Reflections may be produced by window glazing under certain weather conditions, but no mirror glass is proposed. b. Could light or glare from the finished project be a safety hazard or interfere with views? IlN!2l It is not expected that light or glare from the proposed project will be a safety hazard or interfere with views. c. What existing off-site sources of light or glare may affect your proposal? IlN!Ql An existing street light is located in the right-of-way near the project site. This light will be relocated and is expected to remain near the project site. Other nearby light sources include the multifamily developments and single-family residences to the north and east. It is not anticipated that these light sources will negatively impact the project. d. Proposed measures to reduce or control light and glare impacts, if any: IlN!Ql All exterior lighting fixtures will be directed downward and shielded to minimize light pollution. No site lighting is proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? IlN!2l The nearest public open space and recreational facilities appear to be located at Highlands Elementary School, approximately half a mile from the site. Windsor Hills Park is localed approximately one mile away. Neighbors have also expressed that the vegetated area between the project site and Interstate 405 is often used as an informal recreational area. b. Would the proposed project displace any existing recreational uses? If so, describe. IlN!Ql No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: IlN!Ql The project proposal includes a children's play area, common open space with seating and private yards for some units. All units are also provided with balconies and decks. 15 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers located on or near the site? If so, specifically describe. (bfilQ] No. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Is there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources. (bfilQ] No landmarks or material evidence of archaeological significance have been observed. c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc. (bfilQ] The WISMRD database has been consulted. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. No cultural resources have been located on the project site. 14. TRANSPORTATION a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any. (bfilQ] The site is served by Sunset Boulevard NE. It also abuts, but is not served by, Interstate 405. Access to Sunset Boulevard is provided by a single curb cut as shown on the site plan. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop? (bfilQ] No transit currently serves the immediate area of the project site. The nearest transit stop is located at the intersection of NE 7th Street and Edmonds Avenue NE, approximately a quarter mile away. 16 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate? I!N!Q1 31 new parking spaces will be provided. The site is currently undeveloped, and no parking spaces will be removed. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways? If so, generally describe (indicate whether public or private). I!N!Q1 A new private woonerf is proposed as part of the project. The project also proposes to dedicate a 9'-6" strip of land along Sunset Boulevard NE for road purposes and install frontage improvements such as a curb and gutter, sidewalk, planter strip and street trees. e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. Ih.fill2.l Generally, no. Due to the location of Boeing's facilities and Sea-Tac International Airport, air transportation occurs throughout the Renton area. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and non-passenger vehicles). What data or transportation models were used to make these estimates? I!N!Q1 Traffic analysis has been waived by the project's assigned planner. Trips per day have not been calculated. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. No such traffic exists on streets in the area. h. Proposed measures to reduce or control transportation impacts, if any: I!N!Ql As noted above, street dedication and frontage improvement is proposed. The project also proposes surface parking in addition to the dedicated garages to provide off-street parking for the use of guests, delivery vehicles, etc. 15. PUBLIC 5ERVICE5 a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe. I!N!Q1 17 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 The proposed project would increase the population of the immediate area, creating a potential increase in the need for public services. Schools, emergency services, fire and police protection, and utilities are all expected to be impacted. Due to the amount of parking provided, it is anticipated that a greater impact will be made on road infrastructure than on public transit. b. Proposed measures to reduce or control direct impacts on public services, if any . .Ib.!lli!] The proposed project will be designed to incorporate emergency vehicle access to all portions of the site. Impact fees will also be paid as required by the City of Renton. 16. UTILITIES a. Check or circle utilities currently available at the site:.Ib.!lli!] ..,/ natural gas, Stubs only. ...,/ electricity, } V water, ..,/ refuse service, telephone, V sanitary sewer, Stub only. septic system, other ______________ _ b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. IllitlQ} As the site is undeveloped, no utility service lines are currently available. The project proposes to construct utilities as shown on the civil site plan. Utilities constructed shall include a water main extension and services, sanitary side sewers, storm drainage collection and detention, electrical services and communication services. Utilities shall be constructed as extensions of publicly-owned and franchise-operated systems, and a utility easement shall be provided as required by utility operators and/or the City of Renton. C. SIGNATURE IllitlQ} The above answers are true and complete to the best of lead agency is relying on them to make its decision. Position and Agency/Organization: Project Applicant, Citizen Design Collaborative Date Submitted: ....::.01.::.i!:.27:...:i.:c20::..1:...:7 _____ _ 18 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT --------Renton© ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. INSTRUCTIONS FOR APPLICANTS: I!:@Q} This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use "not applicable" or "does not apply'' only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. INSTRUCTIONS FOR LEAD AGENCIES: Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 USE OF CHECKLIST FOR NONPROJECT PROPOSALS:~ For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B even though questions may be answered "does not apply". In addition the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words "project", "applicant", and "property or site" should be read as "proposal", "proponent", and "affected geographic area" respectively. The lead agency may exclude (for non-projects) questions in Part B -Environmental Elements -that do not contribute meaningfully to the analysis of the proposal. For help go to: http://www.ecy.wa.gov/programs/sea/sepa/e-review.html A. BACKGROUND~ 1. Name of proposed project, if applicable:~ Sunset's Edge Townhomes 2. Name of applicant: ~ Citizen Design Collaborative (Primary Contact) Tottenham, LLC (Owner) 3. Address and phone number of applicant and contact person: ~ Jacob Young Citizen Design Collaborative 46 Etruria Street, Suite 201 Seattle, WA 98109 206.853.8055 4. Date checklist prepared: ~ October 27, 2016 Revised: January 27, 2017 5. Agency requesting checklist:~ Joe Notarangelo Tottenham, LLC 50 116th Ave SE, Suite 111 Bellevue, WA 98004 Renton Department of Planning and Development 6. Proposed timing or schedule (including phasing, if applicable):~ The proposal is intended for completion in the fall of 2018. 2 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. £!1illm No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. £!1illm Geotechnical Report and Topographic Survey: E3RA, Inc. PO Box44840 Tacoma, WA 98448 Arborist's Report: Arborists NW 1710 SW 318th Place #44D Federal Way, WA 98023 Drainage Report: Duncanson Company, Inc. 145 SW 155th St, Ste 102 Seattle, WA 98166 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. £!1illm No. 10. List any government approvals or permits that will be needed for your proposal, if known. l!1illm Planned Urban Development Permit City of Renton Building Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) £!1illm Construct 15 townhomes ranging in size from 1000 sf to 1800 sf under a Planned Urban Development. Four townhome plans are proposed. Additional improvements to the site include subgrade utility installation, driveways, a woonerf, landscaping, pedestrian pathways and retaining walls. Zoning for this site is RMF. An unregulated, artificial steep slope is located on site. Street frontage improvements to be constructed include sidewalks, planter strips, and concrete curbs and gutters. The project site is composed of three legal lots. All three lots are currently undeveloped. At the conclusion of construction, a full plat will be performed to create fee simple lots and common tracts. 3 H:\CEO\Oata\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. IbmQ} 701-707 Sunset Boulevard NE Renton, WA 98056 Situate in NE 8-23-5, WM Legal description is located on survey, sheet SV1 B. ENVIRONMENTAL ELEMENTS IbmQ} 1. EARTH a. General description of the site IbmQ} (check or circle one): Flat, rolling, hilly, v"steep slopes, mountainous, other~~~~~~ b. What is the steepest slope on the site (approximate percent slope)? IbmQ} -64% (artificial slope) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils. IbmQ} 6" surface mantle (sod, topsoil, and/or gravel surfacing) 4-1/2 ft fill zone (silty sand with woody debris and general refuse} Native glacial till deposits (gravelly, silty sand} Refer to attached geotechnical report for additional information. 4 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. [illtlQ] None. Refer to geotechnical report for additional details. e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill. [illtlQ] Excavation and fill to take place throughout portions of site proposed for development to provide level building sites and remove incompetent soil. Approximately 75% of the lot will be regraded to provide for building sites, access driveways, common open space and parking areas. Structural fill to be imported as necessary, and incompetent soils to be exported as necessary. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. [illtlQ] Possibility of erosion during construction due to earthwork grading required by this project. Once construction is complete and permanent landscape plantings are established, erosion risks are expected to be approximately equivalent to those of the undeveloped site or better. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? [illtlQ] -65.4% impervious surface h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Z. AIR [illtlQ] Project will be designed and constructed in accordance with the standards and requirements of the City of Renton and recognized Best Management Practices. Silt fences, sheet plastic coverings for exposed slopes, tree protection and stabilized construction entrances will be used to minimize potential erosion. a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. [illtlQ] Emissions due to standard construction activity are expected. No emissions are anticipated after the completion of construction. 5 H :\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. ~ None are known. c. Proposed measures to reduce or control emissions or other impacts to air, if any:~ N/A 3. WATER a. Surface Water: ~ 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into.~ No. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans.~ N/A 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. ~ N/A 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known.~ N/A 6 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.1bmQ} No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge.1bmQ} No. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known.1bmQ} No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals. ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve.1bmQ} None anticipated. c. Water runoff (including stormwater): 7 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. I!N!Q} Runoff is expected from roof area and impervious surfacing for driveways and pedestrian paths. Runoff will be collected and routed to a detention system. No runoff is expected to flow into other surface waters. Refer to drainage report for additional information. 2) Could waste materials enter ground or surface waters? If so, generally describe. I!N!Q} None anticipated. 3} Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. As noted above, drainage will be routed to a detention system. No alteration to the drainage patterns of neighboring sites is anticipated. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: All runoff water will be routed to a subgrade detention tank on the site via a piped storm drainage system. The tank will drain to a 12" outflow at the western margin of the parcel. No groundwater seepage is anticipated. 4. PLANTS I!N!Q} a. Check the types of vegetation found on the site: I!N!Q} V deciduous tree: alder, maple, aspen, other Vevergreen tree: fir, cedar, pine, other Vshrubs V grass _pasture __ crop or grain __ orchards, vineyards or other permanent crops. __ wet soil plants: cattail, buttercup, bull rush, skunk cabbage, other 8 H :\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 __ water plants: water lily, eelgrass, milfoil, other __ other types of vegetation b. What kind and amount of vegetation will be removed or altered? {l}§Ql Trees located within the footprints of proposed structures or impervious areas will be removed. Trees that cannot retained due to proximity to proposed structures will also be removed. Shrubs, grass and other vegetation will be removed throughout the area of work. c. List threatened and endangered species known to be on or near the site. {l}§Ql None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: {l}§Ql Proposed landscaping to utilize native plants and drought-tolerant design. Existing trees to be protected and retained when possible. Refer to landscape design documents for additional information. e. List all noxious weeds and invasive species known to be on or near the site. None known. 5. ANIMALS a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. Examples include: {l}§Ql Birds: hawk, heron, eagle, songbirds, other: ___________ _ Mammals: deer, bear, elk, beaver, other:------------- Fish: bass, salmon, trout, herring, shellfish, other _________ _ b. List any threatened and endangered species known to be on or near the site. {l}§Ql None known. 9 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 c. Is the site part of a migration route? If so, explain. {illtlQ} No. d. Proposed measures to preserve or enhance wildlife, if any: {mtlQ1 None proposed. e. List any invasive animal species known to be on or near the site. None known. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. {mtlQ1 Electric energy will be used for all heating, cooling and domestic cooking needs of the development. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. {illtlQ} It is not anticipated that the proposed structures will shade neighboring parcels. Sight-obscuring vegetation planted along the northerly boundary of the parcel will shade the southern portions of the northerly neighbor. It is expected that the most substantial shading will occur during summer months. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: {illtlQ} The project will be constructed to the standards of BuiltGreen (rating unconfirmed). This could include highly efficient building equipment and appliances, increased envelope R-ratings, and material selections lower in embodied energy than used in conventional construction. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe. {illtlQ} None anticipated. 10 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe any known or possible contamination at the site from present or past uses. None anticipated. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. None known. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. None anticipated. 4) Describe special emergency services that might be required. None anticipated. 5) Proposed measures to reduce or control environmental health hazards, if any: It is not anticipated that any will be required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? lll@!ru The site is located adjacent to Interstate 405, a significant source of traffic noise. Airplane traffic is also a source of noise throughout the area. 11 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site.1ill!)Q] Typical construction noise would be produced on site during the construction of the project. Construction noise would be produced during work hours (7:30am -6pm, Monday through Friday). 3) Proposed measures to reduce or control noise impacts, if any: 1ill!)Q] Construction activities will be limited to typical work hours (8am -5pm, Monday through Friday). A vegetated buffer is also provided between the development and 1-405. Overhead noise is to be mitigated through the provision of insulated roofs. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe.1ill!]Q] The site is undeveloped land with gravel surfacing near Sunset Boulevard NE. The sloped portion of the site is vegetated. The adjacent properties include multifamily residential, single family residential, undeveloped land, city right-of-way and an Interstate highway. It is not anticipated that the proposal will adversely affect current land uses on surround properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or non-forest use? 1ill!]Q] The site has not been used as working farmlands or working forest lands. 1) Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No working farm or forest lands are nearby. c. Describe any structures on the site.1ill!)Q] None present. 12 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 d. Will any structures be demolished? If so, what? [illl1Q] None present. e. What is the current zoning classification of the site? [illl1Q] Residential -Multifamily (RMF) Density limited to 20 dwelling units per acre before bonuses are applied. f. What is the current comprehensive plan designation of the site? [illl1Q] Residential High Density (RHD) g. If applicable, what is the current shoreline master program designation of the site? [illl1Q] N/A h. Has any part of the site been classified as a critical area by the city or county? If so, specify. [illl1Q] Per GIS mapping, a portion of the site has been classified as a steep slope critical area. However, it has been established by the project and city geotechnical engineers that this slope is artificial and therefore not regulated. Refer to the survey and geotechnical report for additional information. i. Approximately how many people would reside or work in the completed project? [illl1Q] 15 -38 persons j. Approximately how many people would the completed project displace? [illl1Q] None. k. Proposed measures to avoid or reduce displacement impacts, if any: [illl1Q] NIA I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: [illl1Q] Townhouse developments are permitted outright in the RMF zone. The RHD Comprehensive Plan designation also states that developments with that designation should incorporate features of both single family and multifamily housing. facilitate infill development, and efficiently use urban services and infrastructure. By locating multiple townhouse structures around a single access point, responding architecturally to traditional forms and providing utility infrastructure, the project meets these standards. 13 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 m. Proposed measures to ensure the proposal is compatible with nearby agricultural and forest lands of long-term commercial significance, if any: N/A 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. ~ 15 units of middle income housing will be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. ~ None. c. Proposed measures to reduce or control housing impacts, if any: ~ No adverse impacts to housing availability or cost are anticipated. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed?~ -36ft to peak of highest roof. Principal exterior building materials include standing seam metal and cement fiberboard. b. What views in the immediate vicinity would be altered or obstructed?~ Territorial views from properties to the east and north would be altered by this development. It is not anticipated that any views would be fully blocked. c. Proposed measures to reduce or control aesthetic impacts, if any:~ The site is terraced to reduce the apparent height and bulk of the townhomes. Vegetated buffers are also provided along the north and south property boundaries. Finally, the architectural massing of the development is designed to respond to and reinterpret traditional urban forms found throughout the area. 14 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur?~ It is expected that interior lighting will be visible through windows during early evening and morning hours. Exterior lighting in this development is minimal and decorative only. Reflections may be produced by window glazing under certain weather conditions, but no mirror glass is proposed. b. Could light or glare from the finished project be a safety hazard or interfere with views? ~ It is not expected that light or glare from the proposed project will be a safety hazard or interfere with views. c. What existing off-site sources of light or glare may affect your proposal?~ An existing street light is located in the right-of-way near the project site. This light will be relocated and is expected to remain near the project site. Other nearby light sources include the multifamily developments and single-family residences to the north and east. It is not anticipated that these light sources will negatively impact the project. d. Proposed measures to reduce or control light and glare impacts, if any: ~ All exterior lighting fixtures will be directed downward and shielded to minimize light pollution. No site lighting is proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? ~ The nearest public open space and recreational facilities appear to be located at Highlands Elementary School, approximately half a mile from the site. Windsor Hills Park is located approximately one mile away. Neighbors have also expressed that the vegetated area between the project site and Interstate 405 is often used as an informal recreational area. b. Would the proposed project displace any existing recreational uses? If so, describe.~ No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any:~ The project proposal includes a children's play area, common open space with seating and private yards for some units. All units are also provided with balconies and decks. 15 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers located on or near the site? If so, specifically describe. I!N)Ql No. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Is there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources. I!N)Ql No landmarks or material evidence of archaeological significance have been observed. c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc. I!N)Ql The WISMRD database has been consulted. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. No cultural resources have been located on the project site. 14. TRANSPORTATION a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any. I!N)Ql The site is served by Sunset Boulevard NE. It also abuts, but is not served by, Interstate 405. Access to Sunset Boulevard is provided by a single curb cut as shown on the site plan. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop? I!N)Ql No transit currently serves the immediate area of the project site. The nearest transit stop is located at the intersection of NE 7th Street and Edmonds Avenue NE, approximately a quarter mile away. 16 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate? l!1filQl 31 new parking spaces will be provided. The site is currently undeveloped, and no parking spaces will be removed. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways? If so, generally describe (indicate whether public or private). IhfilQl A new private woonerf is proposed as part of the project. The project also proposes to dedicate a 9'-6" strip of land along Sunset Boulevard NE for road purposes and install frontage improvements such as a curb and gutter, sidewalk, planter strip and street trees. e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe.1h!tl2.l Generally, no. Due to the location of Boeing's facilities and Sea-Tac International Airport. air transportation occurs throughout the Renton area. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and non-passenger vehicles). What data or transportation models were used to make these estimates? l!1filQl Traffic analysis has been waived by the project's assigned planner. Trips per day have not been calculated. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. No such traffic exists on streets in the area. h. Proposed measures to reduce or control transportation impacts, if any: l!1filQl As noted above, street dedication and frontage improvement is proposed. The project also proposes surface parking in addition to the dedicated garages to provide off-street parking for the use of guests. delivery vehicles, etc. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe. IhfilQl 17 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 The proposed project would increase the population of the immediate area, creating a potential increase in the need for public services. Schools, emergency services, fire and police protection, and utilities are all expected to be impacted. Due to the amount of parking provided, it is anticipated that a greater impact will be made on road infrastructure than on public transit. b. Proposed measures to reduce or control direct impacts on public services, if any.JhfilQ] The proposed project will be designed to incorporate emergency vehicle access to all portions of the site. Impact fees will also be paid as required by the City of Renton. 16. UTILITIES a. Check or circle utilities currently available at the site:JhmQ] V_ electricity, } .../ natural gas, Stubs only . .../ water, .../ refuse service, telephone, .../ sanitary sewer, Stub only. septic system, other~-------------~ b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. [bmQ} As the site is undeveloped, no utility service lines are currently available. The project proposes to construct utilities as shown on the civil site plan. Utilities constructed shall include a water main extension and services, sanitary side sewers, storm drainage collection and detention, electrical services and communication services. Utilities shall be constructed as extensions of publicly-owned and franchise-operated systems, and a utility easement shall be provided as required by utility operators and/or the City of Renton. C. SIGNATURE [bmQ} The above answers are true and complete to the best of lead agency is relying on them to make its decision. Position and Agency/Organization: Project Applicant, Citizen Design Collaborative Date Submitted: _0=..1.:.:./=-27'-'/=-20=-1'-'7 _____ _ 18 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT -------Renton 0 ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. INSTRUCTIONS FOR APPLICANTS:~ This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use "not applicable" or "does not apply'' only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. INSTRUCTIONS FOR LEAD AGENCIES: Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. 1 H:\CED\Data\forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 USE OF CHECKLIST FOR NONPROJECT PROPOSALS:~ For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B even though questions may be answered "does not apply". In addition the SUPPLEMENTAL SHEET FOR NON PROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words "project", "applicant", and "property or site" should be read as "proposal", "proponent", and "affected geographic area" respectively. The lead agency may exclude (for non-projects) questions in Part B -Environmental Elements -that do not contribute meaningfully to the analysis of the proposal. For help go to: http:ljwww.ecy.wa.gov/programs/sea/sepa/e-review.html A. BACKGROUND~ 1. Name of proposed project, if applicable:~ Sunset's Edge Townhomes 2. Name of applicant:~ Citizen Design Collaborative (Primary Contact) Tottenham, LLC (Owner) 3. Address and phone number of applicant and contact person: ~ Jacob Young Citizen Design Collaborative 46 Etruria Street, Suite 201 Seattle, WA 98109 206.853.8055 4. Date checklist prepared:~ October 27, 2016 Revised: January 27, 2017 5. Agency requesting checklist: ~ Joe Notarangelo Tottenham, LLC 50 116th Ave SE, Suite 111 Bellevue, WA 98004 Renton Department of Planning and Development 6. Proposed timing or schedule (including phasing, if applicable}:~ The proposal is intended for completion in the fall of 2018. 2 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. ~ No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal.~ Geotechnical Report and Topographic Survey: E3RA, Inc. PO Box44840 Tacoma, WA 98448 Arborist's Report: Arborists NW 1710 SW 318th Place #44D Federal Way, WA 98023 Drainage Report: Duncanson Company, Inc. 145 SW 155th St, Ste 102 Seattle, WA 98166 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain.~ No. 10. List any government approvals or permits that will be needed for your proposal, if known. ~ Planned Urban Development Permit City of Renton Building Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.)~ Construct 15 town homes ranging in size from 1000 sf to 1800 sf under a Planned Urban Development. Four townhome plans are proposed. Additional improvements to the site include subgrade utility installation, driveways, a woonerf, landscaping, pedestrian pathways and retaining walls. Zoning for this site is RMF. An unregulated, artificial steep slope is located on site. Street frontage improvements to be constructed include sidewalks, planter strips, and concrete curbs and gutters. The project site is composed of three legal lots. All three lots are currently undeveloped. At the conclusion of construction, a full plat will be performed to create fee simple lots and common tracts. 3 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/201S 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. ~ 701-707 Sunset Boulevard NE Renton, WA 98056 Situate in NE 8-23-5, WM Legal description is located on survey, sheet SV1 8. ENVIRONMENTAL ELEMENTS~ 1. EARTH a. General description of the site~ (check or circle one): Flat, rolling, hilly, Vsteep slopes, mountainous, other _____ _ b. What is the steepest slope on the site (approximate percent slope)?~ -64% {artificial slope) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils.~ 6" surface mantle {sod, topsoil, and/or gravel surfacing) 4-1/2 ft fill zone {silty sand with woody debris and general refuse) Native glacial till deposits {gravelly, silty sand) Refer to attached geotechnical report for additional information. 4 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe.~ None. Refer to geotechnical report for additional details. e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill.~ Excavation and fill to take place throughout portions of site proposed for development to provide level building sites and remove incompetent soil. Approximately 75% of the lot will be regraded to provide for building sites, access driveways, common open space and parking areas. Structural fill to be imported as necessary, and incompetent soils to be exported as necessary. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. ~ Possibility of erosion during construction due to earthwork grading required by this project. Once construction is complete and permanent landscape plantings are established, erosion risks are expected to be approximately equivalent to those of the undeveloped site or better. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)?~ -65.4% impervious surface h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: Z. AIR ~ Project will be designed and constructed in accordance with the standards and requirements of the City of Renton and recognized Best Management Practices. Silt fences, sheet plastic coverings for exposed slopes, tree protection and stabilized construction entrances will be used to minimize potential erosion. a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. ~ Emissions due to standard construction activity are expected. No emissions are anticipated after the completion of construction. 5 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe.~ None are known. c. Proposed measures to reduce or control emissions or other impacts to air, if any:~ N/A 3. WATER a. Surface Water: ~ 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. ~ No. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. ~ N/A 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. ~ N/A 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. ~ N/A 6 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.~ No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge.~ No. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. ~ No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals. ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve.~ None anticipated. c. Water runoff (including stormwater): 7 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 1} Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe.~ Runoff is expected from roof area and impervious surfacing for driveways and pedestrian paths. Runoff will be collected and routed to a detention system. No runoff is expected to flow into other surface waters. Refer to drainage report for additional information. 2) Could waste materials enter ground or surface waters? If so, generally describe.~ None anticipated. 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. As noted above, drainage will be routed to a detention system. No alteration to the drainage patterns of neighboring sites is anticipated. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: All runoff water will be routed to a subgrade detention tank on the site via a piped storm drainage system. The tank will drain to a 12" outflow at the western margin of the parcel. No groundwater seepage is anticipated. 4. PLANTS~ a. Check the types of vegetation found on the site:~ V deciduous tree: alder, maple, aspen, other ~ evergreen tree: fir, cedar, pine, other ~shrubs V grass __ pasture __ crop or grain __ orchards, vineyards or other permanent crops. __ wet soil plants: cattail, buttercup, bull rush, skunk cabbage, other 8 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 __ water plants: water lily, eelgrass, milfoil, other __ other types of vegetation b. What kind and amount of vegetation will be removed or altered?~ Trees located within the footprints of proposed structures or impervious areas will be removed. Trees that cannot retained due to proximity to proposed structures will also be removed. Shrubs, grass and other vegetation will be removed throughout the area of work. c. List threatened and endangered species known to be on or near the site.~ None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any:~ Proposed landscaping to utilize native plants and drought-tolerant design. Existing trees to be protected and retained when possible. Refer to landscape design documents for additional information. e. List all noxious weeds and invasive species known to be on or near the site. None known. 5. ANIMALS a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. Examples include:~ Birds: hawk, heron, eagle, songbirds, other: ___________ _ Mammals: deer, bear, elk, beaver, other:------------ Fish: bass, salmon, trout, herring, shellfish, other---------- b. List any threatened and endangered species known to be on or near the site.~ None known. 9 H :\CED\Data\Forms-T em plates\Self-Help Handouts\Pla nning\envchecklist.doc Rev: 08/2015 c. Is the site part of a migration route? If so, explain. [bmQ} No. d. Proposed measures to preserve or enhance wildlife, if any: [bmQ} None proposed. e. List any invasive animal species known to be on or near the site. None known. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. [bmQ} Electric energy will be used for all healing, cooling and domestic cooking needs of the development. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. [bmQ} It is not anticipated that the proposed structures will shade neighboring parcels. Sight-obscuring vegetation planted along the northerly boundary of the parcel will shade the southern portions of the northerly neighbor. II is expected that the most substantial shading will occur during summer months. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: [bmQ} The project will be constructed lo the standards of BuillGreen (rating unconfirmed). This could include highly efficient building equipment and appliances, increased envelope R-ratings, and material selections lower in embodied energy than used in conventional construction. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe. [bmQ} None anticipated. 10 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 1) Describe any known or possible contamination at the site from present or past uses. None anticipated. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. None known. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. None anticipated. 4) Describe special emergency services that might be required. None anticipated. 5) Proposed measures to reduce or control environmental health hazards, if any: It is not anticipated that any will be required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? ~ The site is localed adjacent to Interstate 405, a significant source of traffic noise. Airplane traffic is also a source of noise throughout the area. 11 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 2} What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other}? Indicate what hours noise would come from the site.~ Typical construction noise would be produced on site during the construction of the project. Construction noise would be produced during work hours (7:30am -6pm, Monday through Friday). 3) Proposed measures to reduce or control noise impacts, if any:~ Construction activities will be limited to typical work hours (8am -5pm, Monday through Friday). A vegetated buffer is also provided between the development and 1-405. Overhead noise is to be mitigated through the provision of insulated roofs. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe.~ The site is undeveloped land with gravel surfacing near Sunset Boulevard NE. The sloped portion of the site is vegetated. The adjacent properties include multifamily residential, single family residential, undeveloped land, city right-of-way and an Interstate highway. It is not anticipated that the proposal will adversely affect current land uses on surround properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or non-forest use?~ The site has not been used as working farmlands or working forest lands. 1) Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No working farm or forest lands are nearby. c. Describe any structures on the site.~ None present. 12 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 d. Will any structures be demolished? If so, what?~ None present. e. What is the current zoning classification of the site?~ Residential -Multifamily (RMF) Density limited to 20 dwelling units per acre before bonuses are applied. f. What is the current comprehensive plan designation of the site?~ Residential High Density (RHD) g. If applicable, what is the current shoreline master program designation of the site?~ N/A h. Has any part of the site been classified as a critical area by the city or county? If so, specify.~ Per GIS mapping, a portion of the site has been classified as a steep slope critical area. However. it has been established by the project and city geotechnical engineers that this slope is artificial and therefore not regulated. Refer to the survey and geotechnical report for additional information. i. Approximately how many people would reside or work in the completed project?~ 15 -38 persons j. Approximately how many people would the completed project displace?~ None. k. Proposed measures to avoid or reduce displacement impacts, if any:~ N/A I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: ~ Townhouse developments are permitted outright in the RMF zone. The RHO Comprehensive Plan designation also states that developments with that designation should incorporate features of both single family and multifamily housing, facilitate infill development, and efficiently use urban services and infrastructure. By locating multiple townhouse structures around a single access point, responding architecturally to traditional forms and providing utility infrastructure, the project meets these standards. 13 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 m. Proposed measures to ensure the proposal is compatible with nearby agricultural and forest lands of long-term commercial significance, if any: NIA 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. I!N!Q} 15 units of middle income housing will be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. I!N!Q} None. c. Proposed measures to reduce or control housing impacts, if any: I!N!Q} No adverse impacts to housing availability or cost are anticipated. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s} proposed? I!N!Q} -36ft to peak of highest roof. Principal exterior building materials include standing seam metal and cement fiberboard. b. What views in the immediate vicinity would be altered or obstructed? I!N!Q} Territorial views from properties to the east and north would be altered by this development. It is not anticipated that any views would be fully blocked. c. Proposed measures to reduce or control aesthetic impacts, if any: I!N!Q} The site is terraced to reduce the apparent height and bulk of the townhomes. Vegetated buffers are also provided along the north and south property boundaries. Finally, the architectural massing of the development is designed to respond to and reinterpret traditional urban forms found throughout the area. 14 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? I!N!Q1 It is expected that interior lighting will be visible through windows during early evening and morning hours. Exterior lighting in this development is minimal and decorative only. Reflections may be produced by window glazing under certain weather conditions, but no mirror glass is proposed. b. Could light or glare from the finished project be a safety hazard or interfere with views? I!N!Q} It is not expected that light or glare from the proposed project will be a safety hazard or interfere with views. c. What existing off-site sources of light or glare may affect your proposal? I!N!Q1 An existing street light is located in the right-of-way near the project site. This light will be relocated and is expected to remain near the project site. Other nearby light sources include the multifamily developments and single-family residences to the north and east. It is not anticipated that these light sources will negatively impact the project. d. Proposed measures to reduce or control light and glare impacts, if any: I!N!Q1 All exterior lighting fixtures will be directed downward and shielded to minimize light pollution. No site lighting is proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? I!N!Q} The nearest public open space and recreational facilities appear to be located at Highlands Elementary School, approximately half a mile from the site. Windsor Hills Park is located approximately one mile away. Neighbors have also expressed that the vegetated area between the project site and Interstate 405 is often used as an informal recreational area. b. Would the proposed project displace any existing recreational uses? If so, describe. I!N!Q} No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: I!N!Q} The project proposal includes a children's play area, common open space with seating and private yards for some units. All units are also provided with balconies and decks. 15 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers located on or near the site? If so, specifically describe.~ No. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Is there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources.~ No landmarks or material evidence of archaeological significance have been observed. c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc.~ The WISAARD database has been consulted. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. No cultural resources have been located on the project site. 14. TRANSPORTATION a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any.~ The site is served by Sunset Boulevard NE. It also abuts, but is not served by, Interstate 405. Access to Sunset Boulevard is provided by a single curb cut as shown on the site plan. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop?~ No transit currently serves the immediate area of the project site. The nearest transit stop is located at the intersection of NE 7th Street and Edmonds Avenue NE, approximately a quarter mile away. 16 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate? lbfilQ} 31 new parking spaces will be provided. The site is currently undeveloped, and no parking spaces will be removed. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways? If so, generally describe (indicate whether public or private). lbfilQ} A new private woonerf is proposed as part of the project. The project also proposes to dedicate a 9'-6" strip of land along Sunset Boulevard NE for road purposes and install frontage improvements such as a curb and gutter, sidewalk, planter strip and street trees. e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. lb.!tl21 Generally, no. Due to the location of Boeing's facilities and Sea-Tac International Airport, air transportation occurs throughout the Renton area. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and non-passenger vehicles). What data or transportation models were used to make these estimates? lbfilQ1 Traffic analysis has been waived by the project's assigned planner. Trips per day have not been calculated. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. No such traffic exists on streets in the area. h. Proposed measures to reduce or control transportation impacts, if any: lbfilQ1 As noted above, street dedication and frontage improvement is proposed. The project also proposes surface parking in addition to the dedicated garages to provide off-street parking for the use of guests, delivery vehicles, etc. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe. lbfilQ1 17 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 The proposed project would increase the population of the immediate area, creating a potential increase in the need for public services. Schools, emergency services. fire and police protection, and utilities are all expected to be impacted. Due to the amount of parking provided, it is anticipated that a greater impact will be made on road infrastructure than on public transit. b. Proposed measures to reduce or control direct impacts on public services, if any . .lh!illll The proposed project will be designed to incorporate emergency vehicle access to all portions of the site. Impact fees will also be paid as required by the City of Renton. 16. UTILITIES a. Check or circle utilities currently available at the site:.lh!illll v electricity, } V natural gas, Stubs only. V water, V refuse service, telephone, V sanitary sewer, Stub only. septic system, other --------------- b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed.~ As the site is undeveloped. no utility service lines are currently available. The project proposes to construct utilities as shown on the civil site plan. Utilities constructed shall include a water main extension and services, sanitary side sewers, storm drainage collection and detention, electrical services and communication services. Utilities shall be constructed as extensions of publicly-owned and franchise-operated systems. and a utility easement shall be provided as required by utility operators and/or the City of Renton. C. SIGNATURE~ The above answers are true and complete to the best of lead agency is relying on them to make its decision. Position and Agency/Organization: Project Applicant, Citizen Design Collaborative Date Submitted: 01/27/2017 ----------- 18 H:\CED\Data\Forms·Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT --------Renton® ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. INSTRUCTIONS FOR APPLICANTS:~ This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use "not applicable" or "does not apply" only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. INSTRUCTIONS FOR LEAD AGENCIES: Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 USE OF CHECKLIST FOR NONPROJECT PROPOSALS: 1b.!l!Q} For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B even though questions may be answered "does not apply". In addition the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words "project", "applicant", and "property or site" should be read as "proposal", "proponent", and "affected geographic area" respectively. The lead agency may exclude (for non-projects) questions in Part B -Environmental Elements -that do not contribute meaningfully to the analysis of the proposal. For help go to: http://www.ecy.wa.gov/programs/sea/sepa/e-review.html A. BACKGROUND 1b.!l!Q} 1. Name of proposed project, if applicable: 1b.!l!Q} Sunset's Edge Townhomes 2. Name of applicant: 1b.!l!Q} Citizen Design Collaborative (Primary Contact) Tottenham, LLC (Owner) 3. Address and phone number of applicant and contact person: 1b.!l!Q} Jacob Young Citizen Design Collaborative 46 Etruria Street, Suite 201 Seattle, WA 98109 206.853.8055 4. Date checklist prepared: 1b.!l!Q} October 27, 2016 Revised: January 27, 2017 5. Agency requesting checklist: 1b.!l!Q} Joe Notarangelo Tottenham, LLC 50 116th Ave SE, Suite 111 Bellevue, WA 98004 Renton Department of Planning and Development 6. Proposed timing or schedule (including phasing, if applicable}: 1b.!l!Q} The proposal is intended for completion in the fall of 2018. 2 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/201S 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. ~ No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. ~ Geotechnical Report and Topographic Survey: E3RA, Inc. PO Box44840 Tacoma, WA 98448 Arborist's Report: Arborists NW 1710 SW 318th Place #44D Federal Way, WA 98023 Drainage Report: Duncanson Company, Inc. 145 SW 155th St, Ste 102 Seattle, WA 98166 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. ~ No. 10. List any government approvals or permits that will be needed for your proposal, if known. ~ Planned Urban Development Permit City of Renton Building Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.)~ Construct 15 townhomes ranging in size from 1000 sfto 1800 sf under a Planned Urban Development. Four townhome plans are proposed. Additional improvements to the site include subgrade utility installation, driveways, a woonerf, landscaping, pedestrian pathways and retaining walls. Zoning for this site is RMF. An unregulated, artificial steep slope is located on site. Street frontage improvements to be constructed include sidewalks, planter strips, and concrete curbs and gutters. The project site is composed of three legal lots. All three lots are currently undeveloped. At the conclusion of construction, a full plat will be performed to create fee simple lots and common tracts. 3 H:\CED\Data\Forms-Templates\Self·Help Handouts\Planning\envchecklist.doc Rev: 08/2015 12. Location ofthe proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. {!N!Q} 701-707 Sunset Boulevard NE Renton, WA 98056 Situate in NE 8-23-5, WM Legal description is located on survey, sheet SV1 8, ENVIRONMENTAL ELEMENTS {!N!Q} 1. EARTH a. General description of the site {!N!Q} (check or circle one): Flat, rolling, hilly, Vsteep slopes, mountainous, other~~~~~~ b. What is the steepest slope on the site (approximate percent slope)? {!N!Q} -64 % ( artificial slope) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils. {!N!Q} 6" surface mantle (sod, topsoil, and/or gravel surfacing) 4-1/2 ft fill zone (silty sand with woody debris and general refuse) Native glacial till deposits (gravelly, silty sand) Refer to attached geotechnical report for additional information. 4 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. I!E!Q} None. Refer to geotechnical report for additional details. e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source offill. I!E!Q} Excavation and fill to take place throughout portions of site proposed for development to provide level building sites and remove incompetent soil. Approximately 75% of the lot will be regraded to provide for building sites, access driveways, common open space and parking areas. Structural fill to be imported as necessary, and incompetent soils to be exported as necessary. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. I!E!Q} Possibility of erosion during construction due to earthwork grading required by this project. Once construction is complete and permanent landscape plantings are established, erosion risks are expected to be approximately equivalent to those of the undeveloped site or better. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? I!E!Q} -65.4% impervious surface h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: 2. AIR I!E!Q} Project will be designed and constructed in accordance with the standards and requirements of the City of Renton and recognized Best Management Practices. Silt fences, sheet plastic coverings for exposed slopes, tree protection and stabilized construction entrances will be used to minimize potential erosion. a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. I!E!Q} Emissions due to standard construction activity are expected. No emissions are anticipated after the completion of construction. 5 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. ~ None are known. c. Proposed measures to reduce or control emissions or other impacts to air, if any: ~ N/A 3. WATER a. Surface Water:~ 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into.~ No. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. ~ N/A 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. ~ N/A 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known.~ N/A 6 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site p I a n . D:!.fillll No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. D:!.fillll No. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. D:!.fillll No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals. ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. D:!.fillll None anticipated. c. Water runoff (including stormwater): 7 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. ~ Runoff is expected from roof area and impervious surfacing for driveways and pedestrian paths. Runoff will be collected and routed to a detention system. No runoff is expected to flow into other surface waters. Refer to drainage report for additional information. 2) Could waste materials enter ground or surface waters? If so, generally describe.~ None anticipated. 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. As noted above, drainage will be routed to a detention system. No alteration to the drainage patterns of neighboring sites is anticipated. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: All runoff water will be routed to a subgrade detention tank on the site via a piped storm drainage system. The tank will drain to a 12" outflow at the western margin of the parcel. No groundwater seepage is anticipated. 4. PLANTS~ a. Check the types of vegetation found on the site: ~ <../ deciduous tree: alder, maple, aspen, other ~ evergreen tree: fir, cedar, pine, other ~shrubs ~rass __ pasture __ crop or grain __ orchards, vineyards or other permanent crops. __ wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other 8 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 __ water plants: water lily, eelgrass, milfoil, other __ other types of vegetation b. What kind and amount of vegetation will be removed or altered?~ Trees located within the footprints of proposed structures or impervious areas will be removed. Trees that cannot retained due to proximity to proposed structures will also be removed. Shrubs, grass and other vegetation will be removed throughout the area of work. c. List threatened and endangered species known to be on or near the site. ~ None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: ~ Proposed landscaping to utilize native plants and drought-tolerant design. Existing trees to be protected and retained when possible. Refer to landscape design documents for additional information. e. List all noxious weeds and invasive species known to be on or near the site. None known. 5. ANIMALS a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. Examples include:~ Birds: hawk, heron, eagle, songbirds, other: ___________ _ Mammals: deer, bear, elk, beaver, other: ____________ _ Fish: bass, salmon, trout, herring, shellfish, other _________ _ b. List any threatened and endangered species known to be on or near the site. ~ None known. 9 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. Is the site part of a migration route? If so, explain. Ihllli11 No. d. Proposed measures to preserve or enhance wildlife, if any: l!1llli11 None proposed. e. List any invasive animal species known to be on or near the site. None known. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. Ihllli11 Electric energy will be used for all heating, cooling and domestic cooking needs of the development. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. Ihllli11 It is not anticipated that the proposed structures will shade neighboring parcels. Sight-obscuring vegetation planted along the northerly boundary of the parcel will shade the southern portions of the northerly neighbor. It is expected that the most substantial shading will occur during summer months. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: l!1llli11 The project will be constructed to the standards of BuiltGreen (rating unconfirmed). This could include highly efficient building equipment and appliances, increased envelope R-ratings, and material selections lower in embodied energy than used in conventional construction. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe. Ihllli11 None anticipated. 10 H:\CED\Oata\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe any known or possible contamination at the site from present or past uses. None anticipated. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. None known. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. None anticipated. 4) Describe special emergency services that might be required. None anticipated. 5) Proposed measures to reduce or control environmental health hazards, if any: It is not anticipated that any will be required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? {bg!Q} The site is located adjacent to Interstate 405, a significant source of traffic noise. Airplane traffic is also a source of noise throughout the area. 11 H :\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site.1!:!mm Typical construction noise would be produced on site during the construction of the project. Construction noise would be produced during work hours {7:30am -6pm, Monday through Friday). 3) Proposed measures to reduce or control noise impacts, if any: 1t:!mm Construction activities will be limited to typical work hours (8am -5pm, Monday through Friday). A vegetated buffer is also provided between the development and 1-405. Overhead noise is to be mitigated through the provision of insulated roofs. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe.1!:!mm The site is undeveloped land with gravel surfacing near Sunset Boulevard NE. The sloped portion of the site is vegetated. The adjacent properties include multifamily residential, single family residential, undeveloped land, city right-of-way and an Interstate highway. It is not anticipated that the proposal will adversely affect current land uses on surround properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or non-forest use? 1t:!mm The site has not been used as working farmlands or working forest lands. 1) Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No working farm or forest lands are nearby. c. Describe any structures on the site.1!:!mm None present. 12 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Will any structures be demolished? If so, what?~ None present. e. What is the current zoning classification of the site?~ Residential -Multifamily (RMF) Density limited to 20 dwelling units per acre before bonuses are applied. f. What is the current comprehensive plan designation of the site?~ Residential High Density (RHO) g. If applicable, what is the current shoreline master program designation of the site?~ NIA h. Has any part of the site been classified as a critical area by the city or county? If so, specify.~ Per GIS mapping, a portion of the site has been classified as a steep slope critical area. However, it has been established by the project and city geotechnical engineers that this slope is artificial and therefore not regulated. Refer to the survey and geotechnical report for additional information. i. Approximately how many people would reside or work in the completed project?~ 15 -38 persons j. Approximately how many people would the completed project displace?~ None. k. Proposed measures to avoid or reduce displacement impacts, if any: ~ NIA I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: ~ Townhouse developments are permitted outright in the RMF zone. The RHO Comprehensive Plan designation also states that developments with that designation should incorporate features of both single family and multifamily housing, facilitate infill development, and efficiently use urban services and infrastructure. By locating multiple townhouse structures around a single access point, responding architecturally to traditional forms and providing utility infrastructure, the project meets these standards. 13 H:\CEO\Oata\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 m. Proposed measures to ensure the proposal is compatible with nearby agricultural and forest lands of long-term commercial significance, if any: N/A 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. [llitlQ} 15 units of middle income housing will be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. [llitlQ} None. c. Proposed measures to reduce or control housing impacts, if any: [llitlQ} No adverse impacts to housing availability or cost are anticipated. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? [llitlQ} -36ft to peak of highest roof. Principal exterior building materials include standing seam metal and cement fiberboard. b. What views in the immediate vicinity would be altered or obstructed? [llitlQ} Territorial views from properties to the east and north would be altered by this development. It is not anticipated that any views would be fully blocked. c. Proposed measures to reduce or control aesthetic impacts, if any: [llitlQ} The site is terraced to reduce the apparent height and bulk of the townhomes. Vegetated buffers are also provided along the north and south property boundaries. Finally, the architectural massing of the development is designed to respond to and reinterpret traditional urban forms found throughout the area. 14 H:\CEO\Oata\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur?~ It is expected that interior lighting will be visible through windows during early evening and morning hours. Exterior lighting in this development is minimal and decorative only. Reflections may be produced by window glazing under certain weather conditions, but no mirror glass is proposed. b. Could light or glare from the finished project be a safety hazard or interfere with views? ~ It is not expected that light or glare from the proposed project will be a safety hazard or interfere with views. c. What existing off-site sources of light or glare may affect your proposal?~ An existing street light is located in the right-of-way near the project site. This light will be relocated and is expected to remain near the project site. Other nearby light sources include the multifamily developments and single-family residences to the north and east. It is not anticipated that these light sources will negatively impact the project. d. Proposed measures to reduce or control light and glare impacts, if any:~ All exterior lighting fixtures will be directed downward and shielded to minimize light pollution. No site lighting is proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? ~ The nearest public open space and recreational facilities appear to be located at Highlands Elementary School, approximately half a mile from the site. Windsor Hills Park is located approximately one mile away. Neighbors have also expressed that the vegetated area between the project site and Interstate 405 is often used as an informal recreational area. b. Would the proposed project displace any existing recreational uses? If so, describe.~ No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any:~ The project proposal includes a children's play area, common open space with seating and private yards for some units. All units are also provided with balconies and decks. 15 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers located on or near the site? If so, specifically describe. It:!filll1 No. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Is there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources. It:!filll1 No landmarks or material evidence of archaeological significance have been observed. c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc. It:!filll1 The WISAARD database has been consulted. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. No cultural resources have been located on the project site. 14. TRANSPORTATION a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any. It:!filll1 The site is served by Sunset Boulevard NE. It also abuts, but is not served by, Interstate 405. Access to Sunset Boulevard is provided by a single curb cut as shown on the site plan. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop? It:!filll1 No transit currently serves the immediate area of the project site. The nearest transit stop is located at the intersection of NE 7th Street and Edmonds Avenue NE, approximately a quarter mile away. 16 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 . ' c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate?~ 31 new parking spaces will be provided. The site is currently undeveloped, and no parking spaces will be removed. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways? If so, generally describe (indicate whether public or private). ~ A new private woonerf is proposed as part of the project. The project also proposes to dedicate a 9'-6" strip of land along Sunset Boulevard NE for road purposes and install frontage improvements such as a curb and gutter, sidewalk, planter strip and street trees. e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe . .lb.filQl Generally, no. Due to the location of Boeing's facilities and Sea-Tac International Airport, air transportation occurs throughout the Renton area. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and non-passenger vehicles). What data or transportation models were used to make these estimates?~ Traffic analysis has been waived by the project's assigned planner. Trips per day have not been cal cu lated. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. No such traffic exists on streets in the area. h. Proposed measures to reduce or control transportation impacts, if any: ~ As noted above, street dedication and frontage improvement is proposed. The project also proposes surface parking in addition to the dedicated garages to provide off-street parking for the use of guests, delivery vehicles, etc. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe.~ 17 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 The proposed project would increase the population of the immediate area, creating a potential increase in the need for public services. Schools, emergency services, fire and police protection, and utilities are all expected to be impacted. Due to the amount of parking provided, it is anticipated that a greater impact will be made on road infrastructure than on public transit. b. Proposed measures to reduce or control direct impacts on public services, if any.J!:lfilQ) The proposed project will be designed to incorporate emergency vehicle access to all portions of the site. Impact fees will also be paid as required by the City of Renton. 16. UTILITIES a. Check or circle utilities currently available at the site:J!:lfilQ) ...,/ electricity, } V natural gas, Stubs only. V water, V refuse service, telephone, V sanitary sewer, Stub only. septic system, other ______________ _ b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. Ih@!Q} As the site is undeveloped, no utility service lines are currently available. The project proposes to construct utilities as shown on the civil site plan. Utilities constructed shall include a water main extension and services, sanitary side sewers, storm drainage collection and detention, electrical services and communication services. Utilities shall be constructed as extensions of publicly-owned and franchise-operated systems, and a utility easement shall be provided as required by utility operators and/or the City of Renton. C. SIGNATURE Ih@!Q} The above answers are true and complete to the best of lead agency is relying on them to make its decision. Position and Agency/Organization: Project Applicant, Citizen Design Collaborative Date Submitted: 01/27/2017 ----------- 18 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 . . DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT --------Renton 0 ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. INSTRUCTIONS FOR APPLICANTS: IhfilQ1 This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use "not applicable" or "does not apply" only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. INSTRUCTIONS FOR LEAD AGENCIES: Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. 1 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 USE OF CHECKLIST FOR NONPROJECT PROPOSALS: l!]mru For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B even though questions may be answered "does not apply". In addition the SUPPLEMENTAL SHEET FOR NON PROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words "project", "applicant", and "property or site" should be read as "proposal", "proponent", and "affected geographic area" respectively. The lead agency may exclude (for non-projects) questions in Part B -Environmental Elements -that do not contribute meaningfully to the analysis of the proposal. For help go to: http://www.ecy.wa.gov/programs/sea/sepa/e-review.html A. BACKGROUND l!]mru 1. Name of proposed project, if applicable: l!]mru Sunset's Edge Townhomes 2. Name of applicant: l!]mru Citizen Design Collaborative (Primary Contact) Tottenham, LLC (Owner) 3. Address and phone number of applicant and contact person: l!]mru Jacob Young Citizen Design Collaborative 46 Etruria Street, Suite 201 Seattle, WA 98109 206.853.8055 4. Date checklist prepared: l!]mru October 27, 2016 Revised: January 27, 2017 5. Agency requesting checklist: l!]mru Joe Notarangelo Tottenham, LLC 50 116th Ave SE, Suite 111 Bellevue, WA 98004 Renton Department of Planning and Development 6. Proposed timing or schedule (including phasing, if applicable): I!Jmru The proposal is intended for completion in the fall of 2018. 2 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. lbfilQl No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. lbfilQl Geotechnical Report and Topographic Survey: E3RA, Inc. PO Box44840 Tacoma, WA 98448 Arborist's Report: Arborists NW 1710 SW 318th Place #44D Federal Way, WA 98023 Drainage Report: Duncanson Company, Inc. 145 SW 155th St, Ste 1 02 Seattle, WA 98166 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. lbfilQl No. 10. List any government approvals or permits that will be needed for your proposal, if known. lbfilQl Planned Urban Development Permit City of Renton Building Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) lbfilQl Construct 15 townhomes ranging in size from 1000 sf to 1800 sf under a Planned Urban Development. Four townhome plans are proposed. Additional improvements to the site include subgrade utility installation, driveways, a woonerf, landscaping, pedestrian pathways and retaining walls. Zoning for this site is RMF. An unregulated, artificial steep slope is located on site. Street frontage improvements to be constructed include sidewalks, planter strips, and concrete curbs and gutters. The project site is composed of three legal lots. All three lots are currently undeveloped. At the conclusion of construction, a full plat will be performed to create fee simple lots and common tracts. 3 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. IbmQ1 701-707 Sunset Boulevard NE Renton, WA 98056 Situate in NE 8-23-5, WM Legal description is located on survey, sheet SV1 8. ENVIRONMENTAL ELEMENTS IbmQ1 1. EARTH a. General description of the site IbmQ} (check or circle one): Flat, rolling, hilly, v'steep slopes, mountainous, other ------ b. What is the steepest slope on the site (approximate percent slope)? IbmQ} -64% (artificial slope) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils. I!JmQ1 6" surface mantle (sod, topsoil, and/or gravel surfacing) 4-1/2 ft fill zone (silty sand with woody debris and general refuse) Native glacial till deposits (gravelly, silty sand) Refer to attached geotechnical report for additional information. 4 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe.~ None. Refer to geotechnical report for additional details. e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill.~ Excavation and fill to take place throughout portions of site proposed for development to provide level building sites and remove incompetent soil. Approximately 75% of the lot will be regraded to provide for building sites, access driveways, common open space and parking areas. Structural fill to be imported as necessary, and incompetent soils to be exported as necessary. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. ~ Possibility of erosion during construction due to earthwork grading required by this project. Once construction is complete and pennanent landscape plantings are established, erosion risks are expected to be approximately equivalent to those of the undeveloped site or better. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)?~ -65.4% impervious surface h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: 2. AIR ~ Project will be designed and constructed in accordance with the standards and requirements of the City of Renton and recognized Best Management Practices. Silt fences, sheet plastic coverings for exposed slopes, tree protection and stabilized construction entrances will be used to minimize potential erosion. a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known.~ Emissions due to standard construction activity are expected. No emissions are anticipated after the completion of construction. 5 H :\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. ~ None are known. c. Proposed measures to reduce or control emissions or other impacts to air, if any:~ N/A 3. WATER a. Surface Water:~ 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into.~ No. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans.~ NIA 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. ~ NIA 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. ~ N/A 6 H:\CED\Oata\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.~ No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge. ~ No. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. ~ No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals. ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. ~ None anticipated. c. Water runoff (including stormwater): 7 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 1) Describe the source of runoff (including storm water} and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe. Illi!!Q] Runoff is expected from roof area and impervious surfacing for driveways and pedestrian paths. Runoff will be collected and routed to a detention system. No runoff is expected to flow into other surface waters. Refer to drainage report for additional information. 2} Could waste materials enter ground or surface waters? If so, generally describe. Illi!!Q1 None anticipated. 3} Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. As noted above, drainage will be routed to a detention system. No alteration to the drainage patterns of neighboring sites is anticipated. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: All runoff water will be routed to a subgrade detention tank on the site via a piped storm drainage system. The tank will drain to a 12" outflow at the western margin of the parcel. No groundwater seepage is anticipated. 4. PLANTS Illi!!Q1 a. Check the types of vegetation found on the site: Illi!!Q] V deciduous tree: alder, maple, aspen, other Vevergreen tree: fir, cedar, pine, other Vshrubs V grass __ pasture __ crop or grain __ orchards, vineyards or other permanent crops. __ wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other 8 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 __ water plants: water lily, eelgrass, milfoil, other __ other types of vegetation b. What kind and amount of vegetation will be removed or altered? l.t@Ql Trees located within the footprints of proposed structures or impervious areas will be removed. Trees that cannot retained due to proximity to proposed structures will also be removed. Shrubs, grass and other vegetation will be removed throughout the area of work. c. List threatened and endangered species known to be on or near the site. l.t@Ql None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: l.t@Ql Proposed landscaping to utilize native plants and drought-tolerant design. Existing trees to be protected and retained when possible. Refer to landscape design documents for additional information. e. List all noxious weeds and invasive species known to be on or near the site. None known. 5. ANIMALS a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. Examples include: l.t@Ql Birds: hawk, heron, eagle, songbirds, other:------------ Mammals: deer, bear, elk, beaver, other: ------------- Fish: bass, salmon, trout, herring, shellfish, other---------- b. List any threatened and endangered species known to be on or near the site. l.t@Ql None known. 9 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. Is the site part of a migration route? If so, explain.~ No. d. Proposed measures to preserve or enhance wildlife, if any:~ None proposed. e. List any invasive animal species known to be on or near the site. None known. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc.~ Electric energy will be used for all heating, cooling and domestic cooking needs of the development. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. ~ II is not anticipated that the proposed structures will shade neighboring parcels. Sight-obscuring vegetation planted along the northerly boundary of the parcel will shade the southern portions of the northerly neighbor. It is expected that the most substantial shading will occur during summer months. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: ~ The project will be constructed to the standards of BuiltGreen (rating unconfirmed). This could include highly efficient building equipment and appliances, increased envelope R-ratings, and material selections lower in embodied energy than used in conventional construction. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe.~ None anticipated. 10 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe any known or possible contamination at the site from present or past uses. None anticipated. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. None known. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. None anticipated. 4) Describe special emergency services that might be required. None anticipated. 5) Proposed measures to reduce or control environmental health hazards, if any: It is not anticipated that any will be required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)?~ The site is located adjacent to Interstate 405, a significant source of traffic noise. Airplane traffic is also a source of noise throughout the area. 11 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site.~ Typical construction noise would be produced on site during the construction of the project. Construction noise would be produced during work hours (7:30am -6pm, Monday through Friday). 3) Proposed measures to reduce or control noise impacts, if any:~ Construction activities will be limited to typical work hours (8am -5pm, Monday through Friday). A vegetated buffer is also provided between the development and 1-405. Overhead noise is to be mitigated through the provision of insulated roofs. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe. ~ The site is undeveloped land with gravel surfacing near Sunset Boulevard NE. The sloped portion of the site is vegetated. The adjacent properties include multifamily residential, single family residential, undeveloped land, city right-of-way and an Interstate highway. It is not anticipated that the proposal will adversely affect current land uses on surround properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or non-forest use?~ The site has not been used as working farmlands or working forest lands. 1) Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No working farm or forest lands are nearby. c. Describe any structures on the site.~ None present. 12 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Will any structures be demolished? If so, what?~ None present. e. What is the current zoning classification of the site?~ Residential -Multifamily (RMF) Density limited to 20 dwelling units per acre before bonuses are applied. f. What is the current comprehensive plan designation of the site?~ Residential High Density (RHD) g. If applicable, what is the current shoreline master program designation ofthe site?~ NIA h. Has any part of the site been classified as a critical area by the city or county? If so, specify.~ Per GIS mapping, a portion of the site has been classified as a steep slope critical area. However, it has been established by the project and city geotechnical engineers that this slope is artificial and therefore not regulated. Refer to the survey and geotechnical report for additional information. i. Approximately how many people would reside or work in the completed project?~ 15 -38 persons j. Approximately how many people would the completed project displace?~ None. k. Proposed measures to avoid or reduce displacement impacts, if any:~ NIA I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: ~ Townhouse developments are permitted outright in the RMF zone. The RHD Comprehensive Plan designation also states that developments with that designation should incorporate features of both single family and multifamily housing, facilitate infill development, and efficiently use urban services and infrastructure. By locating multiple townhouse structures around a single access point, responding architecturally lo traditional forms and providing utility infrastructure, the project meets these standards. 13 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 m. Proposed measures to ensure the proposal is compatible with nearby agricultural and forest lands of long-term commercial significance, if any: N/A 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing.~ 15 units of middle income housing will be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing.~ None. c. Proposed measures to reduce or control housing impacts, if any:~ No adverse impacts to housing availability or cost are anticipated. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed?~ -36ft to peak of highest roof. Principal exterior building materials include standing seam metal and cement fiberboard. b. What views in the immediate vicinity would be altered or obstructed?~ Territorial views from properties to the east and north would be altered by this development. It is not anticipated that any views would be fully blocked. c. Proposed measures to reduce or control aesthetic impacts, if any: ~ The site is terraced to reduce the apparent height and bulk of the townhomes. Vegetated buffers are also provided along the north and south property boundaries. Finally, the architectural massing of the development is designed to respond to and reinterpret traditional urban forms found throughout the area. 14 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur?~ It is expected that interior lighting will be visible through windows during early evening and morning hours. Exterior lighting in this development is minimal and decorative only. Reflections may be produced by window glazing under certain weather conditions, but no mirror glass is proposed. b. Could light or glare from the finished project be a safety hazard or interfere with views? ~ It is not expected that light or glare from the proposed project will be a safety hazard or interfere with views. c. What existing off-site sources of light or glare may affect your proposal?~ An existing street light is located in the right-of-way near the project site. This light will be relocated and is expected to remain near the project site. Other nearby light sources include the multifamily developments and single-family residences to the north and east. It is not anticipated that these light sources will negatively impact the project. d. Proposed measures to reduce or control light and glare impacts, if any: ~ All exterior lighting fixtures will be directed downward and shielded to minimize light pollution. No site lighting is proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? ~ The nearest public open space and recreational facilities appear to be located at Highlands Elementary School, approximately half a mile from the site. Windsor Hills Park is located approximately one mile away. Neighbors have also expressed that the vegetated area between the project site and Interstate 405 is often used as an informal recreational area. b. Would the proposed project displace any existing recreational uses? If so, describe.~ No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any:~ The project proposal includes a children's play area, common open space with seating and private yards for some units. All units are also provided with balconies and decks. 15 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers located on or near the site? If so, specifically describe.~ No. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Is there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources. ~ No landmarks or material evidence of archaeological significance have been observed. c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc.~ The WISAARD database has been consulted. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. No cultural resources have been located on the project site. 14. TRANSPORTATION a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any.~ The site is served by Sunset Boulevard NE. It also abuts, but is not served by, Interstate 405. Access to Sunset Boulevard is provided by a single curb cut as shown on the site plan. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop?~ No transit currently serves the immediate area of the project site. The nearest transit stop is located at the intersection of NE 7th Street and Edmonds Avenue NE, approximately a quarter mile away. 16 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate? lbfilQ} 31 new parking spaces will be provided. The site is currently undeveloped, and no parking spaces will be removed. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways? If so, generally describe (indicate whether public or private). lbfilQ} A new private woonerf is proposed as part of the project. The project also proposes to dedicate a 9'-6" strip of land along Sunset Boulevard NE for road purposes and install frontage improvements such as a curb and gutter, sidewalk, planter strip and street trees. e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. IbJtlQl Generally, no. Due to the location of Boeing's facilities and Sea-Tac International Airport, air transportation occurs throughout the Renton area. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and non-passenger vehicles). What data or transportation models were used to make these estimates? lbfilQ} Traffic analysis has been waived by the project's assigned planner. Trips per day have not been calculated. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. No such traffic exists on streets in the area. h. Proposed measures to reduce or control transportation impacts, if any: lbfilQ} As noted above, street dedication and frontage improvement is proposed. The project also proposes surface parking in addition to the dedicated garages to provide off-street parking for the use of guests, delivery vehicles, etc. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe. lbfilQ} 17 H :\CE D\Oata\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 The proposed project would increase the population of the immediate area, creating a potential increase in the need for public services. Schools, emergency services, fire and police protection, and utilities are all expected to be impacted. Due to the amount of parking provided, it is anticipated that a greater impact will be made on road infrastructure than on public transit. b. Proposed measures to reduce or control direct impacts on public services, if any . .ll:lfilQl The proposed project will be designed to incorporate emergency vehicle access to all portions of the site. Impact fees will also be paid as required by the City of Renton. 16. UTILITIES a. Check or circle utilities currently available at the site:.ll:lfilQl \ii' electricity, } V natural gas, Stubs only. V water, V refuse service, telephone, V sanitary sewer, Stub only. septic system, other~~~~~~~~~~~~~~~ b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. [b.!ill1] As the site is undeveloped, no utility service lines are currently available. The project proposes to construct utilities as shown on the civil site plan. Utilities constructed shall include a water main extension and services, sanitary side sewers, storm drainage collection and detention, electrical services and communication services. Utilities shall be constructed as extensions of publicly-owned and franchise-operated systems, and a utility easement shall be provided as required by utility operators and/or the City of Renton. C. SIGNATURE [b.!ill1] The above answers are true and complete to the best of lead agency is relying on them to make its decision. Position and Agency/Organization: Project Applicant, Citizen Design Collaborative Date Submitted: -..::.01.:.:.i2:::7c::/2:::0:...:1..:..7 _____ _ 18 H :\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT --------Ren ton 0 ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. INSTRUCTIONS FOR APPLICANTS:~ This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use "not applicable" or "does not apply" only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period oftime or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. INSTRUCTIONS FOR LEAD AGENCIES: Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 USE OF CHECKLIST FOR NONPROJECT PROPOSALS:~ For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B even though questions may be answered "does not apply". In addition the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words "project", "applicant", and "property or site" should be read as "proposal", "proponent", and "affected geographic area" respectively. The lead agency may exclude (for non-projects) questions in Part B -Environmental Elements -that do not contribute meaningfully to the analysis of the proposal. For help go to: http://www.ecv.wa.gov/programs/sea/sepa/e-review.html A. BACKGROUND~ 1. Name of proposed project, if applicable:~ Sunset's Edge Townhomes 2. Name of applicant: ~ Citizen Design Collaborative (Primary Contact) Tottenham, LLC (Owner) 3. Address and phone number of applicant and contact person: ~ Jacob Young Citizen Design Collaborative 46 Etruria Street, Suite 201 Seattle, WA 981 09 206.853.8055 4. Date checklist prepared:~ October 27, 2016 Revised: January 27, 2017 5. Agency requesting checklist:~ Joe Notarangelo Tottenham, LLC 50 116th Ave SE, Suite 111 Bellevue, WA 98004 Renton Department of Planning and Development 6. Proposed timing or schedule (including phasing, if applicable):~ The proposal is intended for completion in the fall of 2018. 2 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. ~ No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. ~ Geotechnical Report and Topographic Survey: E3RA, Inc. PO Box44840 Tacoma, WA 98448 Arborist's Report: Arborists NW 1710 SW 318th Place #44D Federal Way, WA 98023 Drainage Report: Duncanson Company, Inc. 145 SW 155th St, Ste 102 Seattle, WA 98166 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. ~ No. 10. List any government approvals or permits that will be needed for your proposal, if known. ~ Planned Urban Development Permit City of Renton Building Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) ~ Construct 15 townhomes ranging in size from 1000 sf to 1800 sf under a Planned Urban Development. Four town home plans are proposed. Additional improvements to the site include subgrade utility installation, driveways, a woonerf, landscaping, pedestrian pathways and retaining walls. Zoning for this site is RMF. An unregulated, artificial steep slope is located on site. Street frontage improvements to be constructed include sidewalks, planter strips, and concrete curbs and gutters. The project site is composed of three legal lots. All three lots are currently undeveloped. At the conclusion of construction, a full plat will be performed to create fee simple lots and common tracts. 3 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. l!N!Ql 701-707 Sunset Boulevard NE Renton, WA 98056 Situate in NE 8-23-5, WM Legal description is located on survey, sheet SV1 8. ENVIRONMENTAL ELEMENTS l!N!Ql 1. EARTH a. General description of the site l!N!Q} {check or circle one): Flat, rolling, hilly, ~steep slopes, mountainous, other ------ b. What is the steepest slope on the site (approximate percent slope}? l!N!Q} -64 % ( artificial slope) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils. l!N!Ql 6" surface mantle (sod, topsoil, and/or gravel surfacing) 4-1 /2 ft fill zone (silty sand with woody debris and general refuse) Native glacial till deposits (gravelly, silty sand) Refer to attached geotechnical report for additional information. 4 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe.~ None. Refer to geotechnical report for additional details. e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill.~ Excavation and fill to take place throughout portions of site proposed for development to provide level building sites and remove incompetent soil. Approximately 75% of the lot will be regraded to provide for building sites, access driveways, common open space and parking areas. Structural fill to be imported as necessary, and incompetent soils to be exported as necessary. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. ~ Possibility of erosion during construction due to earthwork grading required by this project. Once construction is complete and permanent landscape plantings are established, erosion risks are expected to be approximately equivalent to those of the undeveloped site or better. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)?~ -65.4% impervious surface h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: 2. AIR ~ Project will be designed and constructed in accordance with the standards and requirements of the City of Renton and recognized Best Management Practices. Silt fences, sheet plastic coverings for exposed slopes, tree protection and stabilized construction entrances will be used to minimize potential erosion. a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known.~ Emissions due to standard construction activity are expected. No emissions are anticipated after the completion of construction. s H:\CED\Data\forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. lb.!lli!l None are known. c. Proposed measures to reduce or control emissions or other impacts to air, if any: lb.!lli!l N/A 3. WATER a. Surface Water: lb.!lli!l 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. lb.!lli!l No. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. lb.!lli!l N/A 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. lb.!lli!l N/A 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. lb.!lli!l N/A 6 H :\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.~ No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge.~ No. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known.~ No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals. ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve. ~ None anticipated. c. Water runoff (including stormwater): 7 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe.~ Runoff is expected from roof area and impervious surfacing for driveways and pedestrian paths. Runoff will be collected and routed to a detention system. No runoff is expected to flow into other surface waters. Refer to drainage report for additional information. 2) Could waste materials enter ground or surface waters? If so, generally describe.~ None anticipated. 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. As noted above. drainage will be routed to a detention system. No alteration to the drainage patterns of neighboring sites is anticipated. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: All runoff water will be routed to a subgrade detention tank on the site via a piped storm drainage system. The tank will drain to a 12" outflow at the western margin of the parcel. No groundwater seepage is anticipated. 4. PLANTS~ a. Check the types of vegetation found on the site: ~ ../ deciduous tree: alder, maple, aspen, other ~ evergreen tree: fir, cedar, pine, other ~shrubs '7 grass __ pasture __ crop or grain __ orchards, vineyards or other permanent crops. __ wet soil plants: cattail, buttercup, bull rush, skunk cabbage, other 8 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/201S __ water plants: water lily, eelgrass, milfoil, other __ other types of vegetation b. What kind and amount of vegetation will be removed or altered?~ Trees located within the footprints of proposed structures or impervious areas will be removed. Trees that cannot retained due to proximity to proposed structures will also be removed. Shrubs, grass and other vegetation will be removed throughout the area of work. c. List threatened and endangered species known to be on or near the site.~ None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: ~ Proposed landscaping to utilize native plants and drought-tolerant design. Existing trees to be protected and retained when possible. Refer to landscape design documents for additional information. e. List all noxious weeds and invasive species known to be on or near the site. None known. 5. ANIMALS a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. Examples include:~ Birds: hawk, heron, eagle, songbirds, other:----------- Mammals: deer, bear, elk, beaver, other:------------- Fish: bass, salmon, trout, herring, shellfish, other---------- b. List any threatened and endangered species known to be on or near the site. ~ None known. 9 H :\CED\Data\Forms-Templates\Self-Help Handouts\Planni ng\envchecklist.doc Rev: 08/2015 c. Is the site part of a migration route? If so, explain.~ No. d. Proposed measures to preserve or enhance wildlife, if any:~ None proposed. e. list any invasive animal species known to be on or near the site. None known. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc.~ Electric energy will be used for all heating, cooling and domestic cooking needs of the development. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. ~ It is not anticipated that the proposed structures will shade neighboring parcels. Sight-obscuring vegetation planted along the northerly boundary of the parcel will shade the southern portions of the northerly neighbor. II is expected that the most substantial shading will occur during summer months. c. What kinds of energy conservation features are included in the plans of this proposal? list other proposed measures to reduce or control energy impacts, if any:~ The project will be constructed to the standards of BuiltGreen (rating unconfirmed). This could include highly efficient building equipment and appliances, increased envelope R-ratings, and material selections lower in embodied energy than used in conventional construction. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe.~ None anticipated. 10 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 1) Describe any known or possible contamination at the site from present or past uses. None anticipated. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. None known. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. None anticipated. 4) Describe special emergency services that might be required. None anticipated. 5) Proposed measures to reduce or control environmental health hazards, if any: It is not anticipated that any will be required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)?~ The site is located adjacent to Interstate 405, a significant source of traffic noise. Airplane traffic is also a source of noise throughout the area. 11 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. Cbllli1] Typical construction noise would be produced on site during the construction of the project. Construction noise would be produced during work hours (7:30am -6pm, Monday through Friday). 3) Proposed measures to reduce or control noise impacts, if any: Cbllli1] Construction activities will be limited to typical work hours (8am -5pm, Monday through Friday). A vegetated buffer is also provided between the development and 1-405. Overhead noise is to be mitigated through the provision of insulated roofs. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe. Cbllli1] The site is undeveloped land with gravel surfacing near Sunset Boulevard NE. The sloped portion of the site is vegetated. The adjacent properties include multifamily residential, single family residential, undeveloped land, city right-of-way and an Interstate highway. It is not anticipated that the proposal will adversely affect current land uses on surround properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or non-forest use? Cbllli1] The site has not been used as working farmlands or working forest lands. 1) Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No working farm or forest lands are nearby. c. Describe any structures on the site. Cbllli1] None present. 12 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Will any structures be demolished? If so, what? {bg]Q1 None present. e. What is the current zoning classification of the site? {bg]Q1 Residential -Multifamily (RMF) Density limited to 20 dwelling units per acre before bonuses are applied. f. What is the current comprehensive plan designation of the site? {bg]Q1 Residential High Density (RHD) g. If applicable, what is the current shoreline master program designation of the site? {bg]Q1 N/A h. Has any part of the site been classified as a critical area by the city or county? If so, specify. {bg]Q1 Per GIS mapping, a portion of the site has been classified as a steep slope critical area. However, it has been established by the project and city geotechnical engineers that this slope is artificial and therefore not regulated. Refer to the survey and geotechnical report for additional information. i. Approximately how many people would reside or work in the completed project? {bg]Q1 15 -38 persons j. Approximately how many people would the completed project displace? {bg]Q1 None. k. Proposed measures to avoid or reduce displacement impacts, if any: {bg]Q1 N/A I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: {bg]Q1 Townhouse developments are permitted outright in the RMF zone. The RHO Comprehensive Plan designation also states that developments with that designation should incorporate features of both single family and multifamily housing, facilitate infill development, and efficiently use urban services and infrastructure. By locating multiple townhouse structures around a single access point, responding architecturally to traditional forms and providing utility infrastructure, the project meets these standards. 13 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 m. Proposed measures to ensure the proposal is compatible with nearby agricultural and forest lands of long-term commercial significance, if any: N/A 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing.~ 15 units of middle income housing will be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing.~ None. c. Proposed measures to reduce or control housing impacts, if any: ~ No adverse impacts to housing availability or cost are anticipated. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed?~ -3611 to peak of highest roof. Principal exterior building materials include standing seam metal and cement fiberboard. b. What views in the immediate vicinity would be altered or obstructed?~ Territorial views from properties to the east and north would be altered by this development. It is not anticipated that any views would be fully blocked. c. Proposed measures to reduce or control aesthetic impacts, if any: ~ The site is terraced to reduce the apparent height and bulk of the townhomes. Vegetated buffers are also provided along the north and south property boundaries. Finally, the architectural massing of the development is designed to respond to and reinterpret traditional urban forms found throughout the area. 14 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur?~ It is expected that interior lighting will be visible through windows during early evening and morning hours. Exterior lighting in this development is minimal and decorative only. Reflections may be produced by window glazing under certain weather conditions, but no mirror glass is proposed. b. Could light or glare from the finished project be a safety hazard or interfere with views? ~ It is not expected that light or glare from the proposed project will be a safety hazard or interfere with views. c. What existing off-site sources of light or glare may affect your proposal?~ An existing street light is located in the right-of-way near the project site. This light will be relocated and is expected to remain near the project site. other nearby light sources include the multifamily developments and single-family residences to the north and east. It is not anticipated that these light sources will negatively impact the project. d. Proposed measures to reduce or control light and glare impacts, if any:~ All exterior lighting fixtures will be directed downward and shielded to minimize light pollution. No site lighting is proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? ~ The nearest public open space and recreational facilities appear to be located at Highlands Elementary School, approximately half a mile from the site. Windsor Hills Park is located approximately one mile away. Neighbors have also expressed that the vegetated area between the project site and Interstate 405 is often used as an informal recreational area. b. Would the proposed project displace any existing recreational uses? If so, describe. I!N!Q} No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: I!N!Q} The project proposal includes a children's play area, common open space with seating and private yards for some units. All units are also provided with balconies and decks. 15 H :\CE D\Data\Forms-T emplates\Self-Help Handouts\Pla nning\envchecklist.doc Rev: 08/2015 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers located on or near the site? If so, specifically describe.~ No. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Is there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources. ~ No landmarks or material evidence of archaeological significance have been observed. c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc.~ The WISMRD database has been consulted. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. No cultural resources have been located on the project site. 14. TRANSPORTATION a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any.~ The site is served by Sunset Boulevard NE. It also abuts, but is not served by, Interstate 405. Access to Sunset Boulevard is provided by a single curb cut as shown on the site plan. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop?~ No transit currently serves the immediate area of the project site. The nearest transit stop is located at the intersection of NE 7th Street and Edmonds Avenue NE, approximately a quarter mile away. 16 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate? IlN!Q} 31 new parking spaces will be provided. The site is currently undeveloped, and no parking spaces will be removed. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways? If so, generally describe (indicate whether public or private). IlN!Q} A new private woonerf is proposed as part of the project. The project also proposes to dedicate a 9'-6" strip of land along Sunset Boulevard NE for road purposes and install frontage improvements such as a curb and gutter, sidewalk, planter strip and street trees. e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe.~ Generally, no. Due to the location of Boeing's facilities and Sea-Tac International Airport, air transportation occurs throughout the Renton area. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and non-passenger vehicles). What data or transportation models were used to make these estimates? IlN!Q} Traffic analysis has been waived by the project's assigned planner. Trips per day have not been calculated. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. No such traffic exists on streets in the area. h. Proposed measures to reduce or control transportation impacts, if any: IlN!Q} As noted above, street dedication and frontage improvement is proposed. The project also proposes surface parking in addition to the dedicated garages to provide off-street parking for the use of guests, delivery vehicles, etc. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe. IlN!Q} 17 H :\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 The proposed project would increase the population of the immediate area, creating a potential increase in the need for public services. Schools, emergency services, fire and police protection, and utilities are all expected to be impacted. Due to the amount of parking provided, it is anticipated that a greater impact will be made on road infrastructure than on public transit. b. Proposed measures to reduce or control direct impacts on public services, if any . .l!:!ltl!ll The proposed project will be designed to incorporate emergency vehicle access to all portions of the site. Impact fees will also be paid as required by the City of Renton. 16. UTILITIES a. Check or circle utilities currently available at the site:.l!:!ltl!ll .../ natural gas, Stubs only. ../ electricity, } V water, V refuse service, telephone, V sanitary sewer, Stub only. septic system, other~~~~~~~~~~~~~~~ b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed.~ As the site is undeveloped, no utility service lines are currently available. The project proposes to construct utilities as shown on the civil site plan. Utilities constructed shall include a water main extension and services, sanitary side sewers, storm drainage collection and detention, electrical services and communication services. Utilities shall be constructed as extensions of publicly-owned and franchise-operated systems, and a utility easement shall be provided as required by utility operators and/or the City of Renton. C. SIGNATURE~ The above answers are true and complete to the best of lead agency is relying on them to make its decision. Position and Agency/Organization: Project Applicant, Citizen Design Collaborative Date Submitted: _.::.01.:.:./2:::7c.c/2:::0:...:1..:..7 _____ _ 18 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT -------Renton€> ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. INSTRUCTIONS FOR APPLICANTS: ~ This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use "not applicable" or "does not apply" only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. INSTRUCTIONS FOR LEAD AGENCIES: Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 USE OF CHECKLIST FOR NONPROJECT PROPOSALS:~ For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B even though questions may be answered "does not apply". In addition the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words "project", "applicant", and "property or site" should be read as "proposal", "proponent", and "affected geographic area" respectively. The lead agency may exclude (for non-projects) questions in Part B -Environmental Elements -that do not contribute meaningfully to the analysis of the proposal. For help go to: htto://www.ecy.wa.gov/programs/sea/sepa/e-review.html A. BACKGROUND~ 1. Name of proposed project, if applicable: ~ Sunset's Edge Townhomes 2. Name of applicant: ~ Citizen Design Collaborative (Primary Contact) Tottenham, LLC (Owner) 3. Address and phone number of applicant and contact person:~ Jacob Young Citizen Design Collaborative 46 Etruria Street, Suite 201 Seattle, WA 98109 206.853.8055 4. Date checklist prepared:~ October 27, 2016 Revised: January 27, 2017 S. Agency requesting checklist:~ Joe Notarangelo Tottenham, LLC 50 116th Ave SE, Suite 111 Bellevue, WA 98004 Renton Department of Planning and Development 6. Proposed timing or schedule (including phasing, if applicable):~ The proposal is intended for completion in the fall of 2018. 2 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. llifilQ} No. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. llifilQI Geotechnical Report and Topographic Survey: E3RA, Inc. PO Box44840 Tacoma, WA 98448 Arborist's Report: Arborists NW 1710 SW 318th Place #44D Federal Way, WA 98023 Drainage Report: Duncanson Company, Inc. 145 SW 155th St, Ste 102 Seattle, WA 98166 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. llifilQ} No. 10. List any government approvals or permits that will be needed for your proposal, if known. llifilQl Planned Urban Development Permit City of Renton Building Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.) lb.!tlJ;1l Construct 15 town homes ranging in size from 1000 sf to 1800 sf under a Planned Urban Development. Four townhome plans are proposed. Additional improvements to the site include subgrade utility installation, driveways, a woonerf, landscaping, pedestrian pathways and retaining walls. Zoning for this site is RMF. An unregulated, artificial steep slope is located on site. Street frontage improvements to be constructed include sidewalks, planter strips, and concrete curbs and gutters. The project site is composed of three legal lots. All three lots are currently undeveloped. At the conclusion of construction, a full plat will be performed to create fee simple lots and common tracts. 3 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. [illtlQ} 701-707 Sunset Boulevard NE Renton, WA 98056 Situate in NE 8-23-5, WM Legal description is located on survey, sheet SV1 8. ENVIRONMENTAL ELEMENTS [illtlQ} 1. EARTH a. General description of the site [illtlQ} (check or circle one): Flat, rolling, hilly, v'steep slopes, mountainous, other _____ _ b. What is the steepest slope on the site (approximate percent slope)? [mtlQ} -64% (artificial slope) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils. [illtlQ} 6" surface mantle (sod, topsoil, and/or gravel surfacing) 4-1/2 ft fill zone (silty sand with woody debris and general refuse) Native glacial till deposits (gravelly, silty sand) Refer to attached geotechnical report for additional information. 4 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. IbfilQl None. Refer to geotechnical report for additional details. e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill. IbfilQl Excavation and fill to take place throughout portions of site proposed for development to provide level building sites and remove incompetent soil. Approximately 75% of the lot will be regraded to provide for building sites, access driveways, common open space and parking areas. Structural fill to be imported as necessary, and inccmpetent soils to be exported as necessary. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. IbfilQl Possibility of erosion during construction due to earthwork grading required by this project. Once ccnstruction is ccmplete and permanent landscape plantings are established, erosion risks are expected to be approximately equivalent to those of the undeveloped site or better. g. About what percent ofthe site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? IbfilQl -65.4% impervious surface h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: 2. AIR IbfilQl Project will be designed and constructed in acccrdance with the standards and requirements of the City of Renton and reccgnized Best Management Practices. Silt fences, sheet plastic ccverings for exposed slopes, tree protection and stabilized construction entrances will be used to minimize potential erosion. a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. IbfilQl Emissions due to standard construction activity are expected. No emissions are anticipated after the completion of construction. s H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe.~ None are known. c. Proposed measures to reduce or control emissions or other impacts to air, if any:~ N/A 3. WATER a. Surface Water:~ 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. ~ No. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans.~ N/A 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. ~ N/A 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known.~ N/A 6 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.~ No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge.~ No. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known.~ No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals. ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve.~ None anticipated. c. Water runoff (including stormwater): 7 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe.~ Runoff is expected from roof area and impervious surfacing for driveways and pedestrian paths. Runoff will be collected and routed to a detention system. No runoff is expected to flow into other surface waters. Refer to drainage report for additional information. 2) Could waste materials enter ground or surface waters? If so, generally describe.~ None anticipated. 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site 7 If so, describe. As noted above, drainage will be routed to a detention system. No alteration to the drainage patterns of neighboring sites is anticipated. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: All runoff water will be routed to a subgrade detention tank on the site via a piped storm drainage system. The tank will drain to a 12" outflow at the western margin of the parcel. No groundwater seepage is anticipated. 4. PLANTS~ a. Check the types of vegetation found on the site: ~ V deciduous tree: alder, maple, aspen, other ~ evergreen tree: fir, cedar, pine, other ~shrubs V grass __ pasture __ crop or grain __ orchards, vineyards or other permanent crops. __ wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other 8 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 __ water plants: water lily, eelgrass, milfoil, other __ other types of vegetation b. What kind and amount of vegetation will be removed or altered? IlJ.lllil1 Trees located within the footprints of proposed structures or impervious areas will be removed. Trees that cannot retained due to proximity to proposed structures will also be removed. Shrubs, grass and other vegetation will be removed throughout the area of work. c. List threatened and endangered species known to be on or near the site. IlJ.lllil1 None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any: IlJ.lllil1 Proposed landscaping to utilize native plants and drought-tolerant design. Existing trees to be protected and retained when possible. Refer to landscape design documents for additional information. e. List all noxious weeds and invasive species known to be on or near the site. None known. 5. ANIMALS a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. Examples include: IlJ.lllil1 Birds: hawk, heron, eagle, songbirds, other:------------ Mammals: deer, bear, elk, beaver, other:------------- Fish: bass, salmon, trout, herring, shellfish, other---------- b. List any threatened and endangered species known to be on or near the site. IlJ.lllil1 None known. 9 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. Is the site part of a migration route? If so, explain. Im!)Q1 No. d. Proposed measures to preserve or enhance wildlife, if any: Im!)Q1 None proposed. e. List any invasive animal species known to be on or near the site. None known. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. Im!)Q1 Electric energy will be used for all heating, cooling and domestic cooking needs of the development. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. Im!)Q1 It is not anticipated that the proposed structures will shade neighboring parcels. Sight-obscuring vegetation planted along the northerly boundary of the parcel will shade the southern portions of the northerly neighbor. It is expected that the most substantial shading will occur during summer months. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: Im!)Q1 The project will be constructed to the standards of BuiltGreen (rating unconfirmed). This could include highly efficient building equipment and appliances, increased envelope R-ratings, and material selections lower in embodied energy than used in conventional construction. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe. Im!)Q1 None anticipated. 10 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 1) Describe any known or possible contamination at the site from present or past uses. None anticipated. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. None known. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. None anticipated. 4) Describe special emergency services that might be required. None anticipated. 5) Proposed measures to reduce or control environmental health hazards, if any: It is not anticipated that any will be required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)?~ The site is located adjacent to Interstate 405, a significant source of traffic noise. Airplane traffic is also a source of noise throughout the area. 11 H :\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 2) What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site.~ Typical construction noise would be produced on site during the construction of the project. Construction noise would be produced during work hours (7:30am -6pm, Monday through Friday). 3) Proposed measures to reduce or control noise impacts, if any:~ Construction activities will be limited to typical work hours (8am -5pm, Monday through Friday). A vegetated buffer is also provided between the development and 1-405. Overhead noise is to be mitigated through the provision of insulated roofs. 8. LAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe.~ The site is undeveloped land with gravel surfacing near Sunset Boulevard NE. The sloped portion of the site is vegetated. The adjacent properties include multifamily residential, single family residential, undeveloped land, city right-of-way and an Interstate highway. It is not anticipated that the proposal will adversely affect current land uses on surround properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or non-forest use?~ The site has not been used as working farmlands or working forest lands. 1) Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No working farm or forest lands are nearby. c. Describe any structures on the site.~ None present. 12 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 d. Will any structures be demolished? If so, what? IbmQ} None present. e. What is the current zoning classification of the site? IbmQ} Residential -Multifamily (RMF) Density limited to 20 dwelling units per acre before bonuses are applied. f. What is the current comprehensive plan designation of the site? IbmQ} Residential High Density (RHD) g. If applicable, what is the current shoreline master program designation of the site? IbmQ} N/A h. Has any part of the site been classified as a critical area by the city or county? If so, specify. IbmQ} Per GIS mapping, a portion of the site has been classified as a steep slope critical area. However, it has been established by the project and city geotechnical engineers that this slope is artificial and therefore not regulated. Refer to the survey and geotechnical report for additional information. i. Approximately how many people would reside or work in the completed project? IbmQ} 15 -38 persons j. Approximately how many people would the completed project displace? IbmQ} None. k. Proposed measures to avoid or reduce displacement impacts, if any: IbmQ} N/A I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: IbmQ} Townhouse developments are permitted outright in the RMF zone. The RHD Comprehensive Plan designation also states that developments with that designation should incorporate features of both single family and multifamily housing, facilitate infill development, and efficiently use urban services and infrastructure. By locating multiple townhouse structures around a single access point, responding architecturally to traditional forms and providing utility infrastructure, the project meets these standards. 13 H:\CED\Data\Forms-Templates\Self-Help Handouts\Pla nning\envchecklist.doc Rev: 08/2015 m. Proposed measures to ensure the proposal is compatible with nearby agricultural and forest lands of long-term commercial significance, if any: NIA 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing.~ 15 units of middle income housing will be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing.~ None. c. Proposed measures to reduce or control housing impacts, if any:~ No adverse impacts to housing availability or cost are anticipated. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed?~ -36ft to peak of highest roof. Principal exterior building materials include standing seam metal and cement fiberboard. b. What views in the immediate vicinity would be altered or obstructed?~ Territorial views from properties to the east and north would be altered by this development. It is not anticipated that any views would be fully blocked. c. Proposed measures to reduce or control aesthetic impacts, if any:~ The site is terraced to reduce the apparent height and bulk of the townhomes. Vegetated buffers are also provided along the north and south property boundaries. Finally, the architectural massing of the development is designed to respond to and reinterpret traditional urban forms found throughout the area. 14 H :\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur?~ It is expected that interior lighting will be visible through windows during early evening and morning hours. Exterior lighting in this development is minimal and decorative only. Reflections may be produced by window glazing under certain weather conditions, but no mirror glass is proposed. b. Could light or glare from the finished project be a safety hazard or interfere with views? ~ It is not expected that light or glare from the proposed project will be a safety hazard or interfere with views. c. What existing off-site sources of light or glare may affect your proposal?~ An existing street light is located in the right-of-way near the project site. This light will be relocated and is expected to remain near the project site. Other nearby light sources include the multifamily developments and single-family residences to the north and east. II is not anticipated that these light sources will negatively impact the project. d. Proposed measures to reduce or control light and glare impacts, if any: ~ All exterior lighting fixtures will be directed downward and shielded to minimize light pollution. No site lighting is proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? ~ The nearest public open space and recreational facilities appear to be located at Highlands Elementary School, approximately half a mile from the site. Windsor Hills Park is located approximately one mile away. Neighbors have also expressed that the vegetated area between the project site and Interstate 405 is often used as an informal recreational area. b. Would the proposed project displace any existing recreational uses? If so, describe.~ No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any:~ The project proposal includes a children's play area, common open space with seating and private yards for some units. All units are also provided with balconies and decks. 15 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers located on or near the site? If so, specifically describe.~ No. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Is there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources. ~ No landmarks or material evidence of archaeological significance have been observed. c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc.~ The WISAARD database has been consulted. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. No cultural resources have been located on the project site. 14. TRANSPORTATION a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any.~ The site is served by Sunset Boulevard NE. It also abuts, but is not served by, Interstate 405. Access to Sunset Boulevard is provided by a single curb cut as shown on the site plan. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop?~ No transit currently serves the immediate area of the project site. The nearest transit stop is located at the intersection of NE 7th Street and Edmonds Avenue NE, approximately a quarter mile away. 16 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate?~ 31 new parking spaces will be provided. The site is currently undeveloped, and no parking spaces will be removed. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways? If so, generally describe (indicate whether public or private).~ A new private woonerf is proposed as part of the project. The project also proposes to dedicate a 9'-6" strip of land along Sunset Boulevard NE for road purposes and install frontage improvements such as a curb and gutter, sidewalk, planter strip and street trees. e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. I.b.rlJ:!l Generally, no. Due to the location of Boeing's facilities and Sea-Tac International Airport, air transportation occurs throughout the Renton area. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and non-passenger vehicles). What data or transportation models were used to make these estimates?~ Traffic analysis has been waived by the project's assigned planner. Trips per day have not been calculated. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. No such traffic exists on streets in the area. h. Proposed measures to reduce or control transportation impacts, if any:~ As noted above, street dedication and frontage improvement is proposed. The project also proposes surface parking in addition to the dedicated garages to provide off-street parking for the use of guests, delivery vehicles, etc. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe.~ 17 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 The proposed project would increase the population of the immediate area, creating a potential increase in the need for public services. Schools, emergency services, fire and police protection, and utilities are all expected to be impacted. Due to the amount of parking provided, it is anticipated that a greater impact will be made on road infrastructure than on public transit. b. Proposed measures to reduce or control direct impacts on public services, if any.Jllil!Ql The proposed project will be designed to incorporate emergency vehicle access to all portions of the site. Impact fees will also be paid as required by the City of Renton. 16. UTILITIES a. Check or circle utilities currently available at the site:Jllil!Ql V electricity, } V natural gas, Stubs only. V water, V refuse service, telephone, V sanitary sewer, Stub only. septic system, other ______________ _ b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed. {llitlQ} As the site is undeveloped, no utility service lines are currently available. The project proposes to construct utilities as shown on the civil site plan. Utilities constructed shall include a water main extension and services, sanitary side sewers, storm drainage collection and detention, electrical services and communication services. Utilities shall be constructed as extensions of publicly-owned and franchise-operated systems, and a utility easement shall be provided as required by utility operators and/or the City of Renton. C. SIGNATURE lllilli1} The above answers are true and complete to the best of lead agency is relying on them to make its decision. Position and Agency/Organization: Project Applicant, Citizen Design Collaborative Date Submitted: ....::.01.:.:.f.::.27:.:f.::.20=-1:.:7 _____ _ 18 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT ---------Iten ton 0 ENVIRONMENTAL CHECKLIST PURPOSE OF CHECKLIST: Planning Division 1055 South Grady Way-Renton, WA 98057 Phone: 425-430-7200 I www.rentonwa.gov Governmental agencies use this checklist to help determine whether the environmental impacts of your proposal are significant. This information is also helpful to determine if available avoidance, minimization or compensatory mitigation measures will address the probable significant impacts or if an environmental impact statement will be prepared to further analyze the proposal. INSTRUCTIONS FOR APPLICANTS: [DIDQ] This environmental checklist asks you to describe some basic information about your proposal. Please answer each question accurately and carefully, to the best of your knowledge. You may need to consult with an agency specialist or private consultant for some questions. You may use "not applicable" or "does not apply" only when you can explain why it does not apply and not when the answer is unknown. You may also attach or incorporate by reference additional studies reports. Complete and accurate answers to these questions often avoid delays with the SEPA process as well as later in the decision-making process. The checklist questions apply to all parts of your proposal, even if you plan to do them over a period of time or on different parcels of land. Attach any additional information that will help describe your proposal or its environmental effects. The agency to which you submit this checklist may ask you to explain your answers or provide additional information reasonably related to determining if there may be significant adverse impact. INSTRUCTIONS FOR LEAD AGENCIES: Additional information may be necessary to evaluate the existing environment, all interrelated aspects of the proposal and an analysis of adverse impacts. The checklist is considered the first but not necessarily the only source of information needed to make an adequate threshold determination. Once a threshold determination is made, the lead agency is responsible for the completeness and accuracy of the checklist and other supporting documents. 1 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 USE OF CHECKLIST FOR NONPROJECT PROPOSALS:~ For nonproject proposals (such as ordinances, regulations, plans and programs), complete the applicable parts of sections A and B even though questions may be answered "does not apply''. In addition the SUPPLEMENTAL SHEET FOR NONPROJECT ACTIONS (part D). Please completely answer all questions that apply and note that the words "project", "applicant", and "property or site" should be read as "proposal", "proponent", and "affected geographic area" respectively. The lead agency may exclude (for non-projects) questions in Part B -Environmental Elements -that do not contribute meaningfully to the analysis of the proposal. For help go to: http://www.ecy.wa.gov/programs/sea/sepa/e-review.html A. BACKGROUND~ 1. Name of proposed project, if applicable:~ Sunset's Edge Townhomes 2. Name of applicant: ~ Citizen Design Collaborative (Primary Contact) Tottenham, LLC (Owner) 3. Address and phone number of applicant and contact person:~ Jacob Young Citizen Design Collaborative 46 Etruria Street, Suite 201 SeaWe, WA 98109 206.853.8055 4. Date checklist prepared: ~ October 27, 2016 Revised: January 27, 2017 5. Agency requesting checklist: ~ Joe Notarangelo Tottenham, LLC 50 116th Ave SE, Suite 111 Bellevue, WA 98004 Renton Department of Planning and Development 6. Proposed timing or schedule (including phasing, if applicable):~ The proposal is intended for completion in the fall of 2018. 2 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. ~ No. 8. list any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. ~ Geotechnical Report and Topographic Survey: E3RA, Inc. PO Box44840 Tacoma, WA 98448 Arborist's Report: Arborists NW 1710 SW 318th Place #44D Federal Way, WA 98023 Drainage Report: Duncanson Company, Inc. 145 SW 155th St, Ste 102 Seattle, WA 98166 9. Do you know whether applications are pending for governmental approvals of other proposals directly affecting the property covered by your proposal? If yes, explain. ~ No. 10. List any government approvals or permits that will be needed for your proposal, if known. ~ Planned Urban Development Permit City of Renton Building Permit 11. Give brief, complete description of your proposal, including the proposed uses and the size of the project and site. There are several questions later in this checklist that ask you to describe certain aspects of your proposal. You do not need to repeat those answers on this page. (Lead agencies may modify this form to include additional specific information on project description.)~ Construct 15 townhomes ranging in size from 1000 sfto 1800 sf under a Planned Urban Development. Four townhome plans are proposed. Additional improvements to the site include subgrade utility installation. driveways. a woonerf, landscaping, pedestrian pathways and retaining walls. Zoning for this site is RMF. An unregulated, artificial steep slope is located on site. Street frontage improvements to be constructed include sidewalks, planter strips, and concrete curbs and gutters. The project site is composed of three legal lots. All three lots are currently undeveloped. At the conclusion of construction, a full plat will be performed to create fee simple lots and common tracts. 3 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 12. Location of the proposal. Give sufficient information for a person to understand the precise location of your proposed project, including a street address, if any, and section, township, and range, if known. If a proposal would occur over a range of area, provide the range or boundaries of the site(s). Provide a legal description, site plan, vicinity map, and topographic map, if reasonably available. While you should submit any plans required by the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist.~ 701-707 Sunset Boulevard NE Renton, WA 98056 Situate in NE 8-23-5, WM Legal description is located on survey, sheet SV1 8. ENVIRONMENTAL ELEMENTS~ 1. EARTH a. General description of the site~ (check or circle one): Flat, rolling, hilly, Vsteep slopes, mountainous, other ------ b. What is the steepest slope on the site (approximate percent slope)?~ -64% (artificial slope) c. What general types of soils are found on the site (for example, clay, sand, gravel, peat, muck)? If you know the classification of agricultural soils, specify them and note any agricultural land of long-term commercial significance and whether the proposal results in removing any of these soils.~ 6" surface mantle (sod, topsoil, and/or gravel surfacing) 4-1/2 ft fill zone (silty sand with woody debris and general refuse) Native glacial till deposits (gravelly, silty sand) Refer to attached geotechnical report for additional information. 4 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. lilll!Q} None. Refer to geotechnical report for additional details. e. Describe the purpose, type, total area, and approximate quantities and total affected area of any filling, excavation, and grading proposed. Indicate source of fill. lilll!Q} Excavation and fill to take place throughout portions of site proposed for development to provide level building sites and remove incompetent soil. Approximately 75% of the lot will be regraded to provide for building sites, access driveways, common open space and parking areas. Structural fill to be imported as necessary, and incompetent soils to be exported as necessary. f. Could erosion occur as a result of clearing, construction, or use? If so, generally describe. lilll!Q} Possibility of erosion during construction due to earthwork grading required by this project. Once construction is complete and permanent landscape plantings are established, erosion risks are expected to be approximately equivalent to those of the undeveloped site or better. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? lilll!Q} -65.4% impervious surface h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any: 2. AIR lilll!Q} Project will be designed and constructed in accordance with the standards and requirements of the City of Renton and recognized Best Management Practices. Silt fences, sheet plastic coverings for exposed slopes, tree protection and stabilized construction entrances will be used to minimize potential erosion. a. What types of emissions to the air would result from the proposal during construction, operation, and maintenance when the project is completed? If any, generally describe and give approximate quantities if known. lilll!Q} Emissions due to standard construction activity are expected. No emissions are anticipated after the completion of construction. 5 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. (bmQ] None are known. c. Proposed measures to reduce or control emissions or other impacts to air, if any: lbmQ] N/A 3. WATER a. Surface Water: lbmQ] 1) Is there any surface water body on or in the immediate vicinity of the site (including year-round and seasonal streams, saltwater, lakes, ponds, wetlands)? If yes, describe type and provide names. If appropriate, state what stream or river it flows into. (bmQ] No. 2) Will the project require any work over, in, or adjacent to (within 200 feet) the described waters? If yes, please describe and attach available plans. lbmQ] N/A 3) Estimate the amount of fill and dredge material that would be placed in or removed from surface water or wetlands and indicate the area of the site that would be affected. Indicate the source of fill material. lbmQ] N/A 4) Will the proposal require surface water withdrawals or diversions? Give general description, purpose, and approximate quantities if known. lbmQ] N/A 6 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 5) Does the proposal lie within a 100-year floodplain? If so, note location on the site plan.~ No. 6) Does the proposal involve any discharges of waste materials to surface waters? If so, describe the type of waste and anticipated volume of discharge.~ No. b. Ground Water: 1) Will groundwater be withdrawn from a well for drinking water or other purposes? If so, give a general description of the well, proposed uses and approximate quantities withdrawn from the well. Will water be discharged to groundwater? Give general description, purpose, and approximate quantities if known. ~ No. 2) Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (for example: Domestic sewage; industrial, containing the following chemicals. ; agricultural; etc.). Describe the general size of the system, the number of such systems, the number of houses to be served (if applicable), or the number of animals or humans the system(s) are expected to serve.~ None anticipated. c. Water runoff (including stormwater): 7 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 1) Describe the source of runoff (including storm water) and method of collection and disposal, if any (include quantities, if known). Where will this water flow? Will this water flow into other waters? If so, describe.~ Runoff is expected from roof area and impervious surfacing for driveways and pedestrian paths. Runoff will be collected and routed to a detention system. No runoff is expected to flow into other surface waters. Refer to drainage report for additional information. 2) Could waste materials enter ground or surface waters? If so, generally describe.~ None anticipated. 3) Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. As noted above. drainage will be routed to a detention system. No alteration to the drainage patterns of neighboring sites is anticipated. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: All runoff water will be routed to a subgrade detention tank on the site via a piped storm drainage system. The tank will drain to a 12" outflow at the western margin of the parcel. No groundwater seepage is anticipated. 4. PLANTS~ a. Check the types of vegetation found on the site:~ V deciduous tree: alder, maple, aspen, other ~ evergreen tree: fir, cedar, pine, other ~shrubs ../ grass _pasture __ crop or grain __ orchards, vineyards or other permanent crops. __ wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other 8 H:\CED\Data\Forms-T emplates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 __ water plants: water lily, eelgrass, milfoil, other __ other types of vegetation b. What kind and amount of vegetation will be removed or altered?~ Trees located within the footprints of proposed structures or impervious areas will be removed. Trees that cannot retained due to proximity to proposed structures will also be removed. Shrubs, grass and other vegetation will be removed throughout the area of work. c. List threatened and endangered species known to be on or near the site. ~ None known. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any:~ Proposed landscaping to utilize native plants and drought-tolerant design. Existing trees to be protected and retained when possible. Refer to landscape design documents for additional information. e. List all noxious weeds and invasive species known to be on or near the site. None known. 5. ANIMALS a. List any birds and other animals which have been observed on or near the site or are known to be on or near the site. Examples include:~ Birds: hawk, heron, eagle, songbirds, other: ___________ _ Mammals: deer, bear, elk, beaver, other: ------------- Fish: bass, salmon, trout, herring, shellfish, other---------- b. List any threatened and endangered species known to be on or near the site.~ None known. 9 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. Is the site part of a migration route? If so, explain. I!N]Q1 No. d. Proposed measures to preserve or enhance wildlife, if any: I!N]Q1 None proposed. e. List any invasive animal species known to be on or near the site. None known. 6. ENERGY AND NATURAL RESOURCES a. What kinds of energy (electric, natural gas, oil, wood stove, solar) will be used to meet the completed project's energy needs? Describe whether it will be used for heating, manufacturing, etc. I!N]Q1 Electric energy will be used for all heating, cooling and domestic cooking needs of the development. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. I!N]Q1 It is not anticipated that the proposed structures will shade neighboring parcels. Sight-obscuring vegetation planted along the northerly boundary of the parcel will shade the southern portions of the northerly neighbor. It is expected that the most substantial shading will occur during summer months. c. What kinds of energy conservation features are included in the plans of this proposal? List other proposed measures to reduce or control energy impacts, if any: I!N]Q1 The project will be constructed to the standards of BuiltGreen (rating unconfirmed). This could include highly efficient building equipment and appliances, increased envelope R-ratings, and material selections lower in embodied energy than used in conventional construction. 7. ENVIRONMENTAL HEALTH a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste that could occur as a result of this proposal? If so, describe. I!N]Q1 None anticipated. 10 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 1) Describe any known or possible contamination at the site from present or past uses. None anticipated. 2) Describe existing hazardous chemicals/conditions that might affect project development and design. This includes underground hazardous liquid and gas transmission pipelines located within the project area and in the vicinity. None known. 3) Describe any toxic or hazardous chemicals that might be stored, used, or produced during the project's development or construction, or at any time during the operating life of the project. None anticipated. 4) Describe special emergency services that might be required. None anticipated. 5) Proposed measures to reduce or control environmental health hazards, if any: It is not anticipated that any will be required. b. Noise 1) What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? [bg!Ql The site is located adjacent to Interstate 405, a significant source of traffic noise. Airplane traffic is also a source of noise throughout the area. 11 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 2} What types and levels of noise would be created by or associated with the project on a short-term or a long-term basis (for example: traffic, construction, operation, other)? Indicate what hours noise would come from the site. l!N!Q} Typical construction noise would be produced on site during the construction of the project. Construction noise would be produced during work hours (7:30am -6pm, Monday through Friday). 3) Proposed measures to reduce or control noise impacts, if any: l!N!Q} Construction activities will be limited to typical work hours (8am -5pm, Monday through Friday). A vegetated buffer is also provided between the development and 1-405. Overhead noise is to be mitigated through the provision of insulated roofs. 8. lAND AND SHORELINE USE a. What is the current use of the site and adjacent properties? Will the proposal affect current land uses on nearby or adjacent properties? If so, describe. l!N!Q} The site is undeveloped land with gravel surfacing near Sunset Boulevard NE. The sloped portion of the site is vegetated. The adjacent properties include multifamily residential, single family residential, undeveloped land, city right-of-way and an Interstate highway. It is not anticipated that the proposal will adversely affect current land uses on surround properties. b. Has the project site been used as working farmlands or working forest lands? If so, describe. How much agricultural or forest land of long-term commercial significance will be converted to other uses as a result of the proposal, if any? If resource lands have not been designated, how many acres in farmland or forest land tax status will be converted to nonfarm or non-forest use? l!N!Q} The site has not been used as working farmlands or working forest lands. 1} Will the proposal affect or be affected by surrounding working farm or forest land normal business operations, such as oversize equipment access, the application of pesticides, tilling, and harvesting? If so, how: No working farm or forest lands are nearby. c. Describe any structures on the site. l!N!Q} None present. 12 H:\CED\Oata\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 d. Will any structures be demolished? If so, what? itlfilQl None present. e. What is the current zoning classification of the site? itlfilQl Residential -Multifamily (RMF) Density limited to 20 dwelling units per acre before bonuses are applied. f. What is the current comprehensive plan designation of the site? itlfilQl Residential High Density (RHD) g. If applicable, what is the current shoreline master program designation of the site? itlfilQl N/A h. Has any part of the site been classified as a critical area by the city or county? If so, specify. itlfilQl Per GIS mapping, a portion of the site has been classified as a steep slope critical area. However, it has been established by the project and city geotechnical engineers that this slope is artificial and therefore not regulated. Refer to the survey and geotechnical report for additional information. i. Approximately how many people would reside or work in the completed project? itlfilQl 15 -38 persons j. Approximately how many people would the completed project displace? itlfilQl None. k. Proposed measures to avoid or reduce displacement impacts, if any: itlfilQl NIA I. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any: itlfilQl Townhouse developments are permitted outright in the RMF zone. The RHD Comprehensive Plan designation also states that developments with that designation should incorporate features of both single family and multifamily housing. facilitate infill development, and efficiently use urban services and infrastructure. By locating multiple townhouse structures around a single access point, responding architecturally to traditional forms and providing utility infrastructure, the project meets these standards. n H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 m. Proposed measures to ensure the proposal is compatible with nearby agricultural and forest lands of long-term commercial significance, if any: N/A 9. HOUSING a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing.~ 15 units of middle income housing will be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing.~ None. c. Proposed measures to reduce or control housing impacts, if any:~ No adverse impacts to housing availability or cost are anticipated. 10. AESTHETICS a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed?~ -36ft to peak of highest roof. Principal exterior building materials include standing seam metal and cement fiberboard. b. What views in the immediate vicinity would be altered or obstructed?~ Territorial views from properties to the east and north would be altered by this development. It is not anticipated that any views would be fully blocked. c. Proposed measures to reduce or control aesthetic impacts, if any:~ The site is terraced to reduce the apparent height and bulk of the townhomes. Vegetated buffers are also provided along the north and south property boundaries. Finally, the architectural massing of the development is designed to respond to and reinterpret traditional urban forms found throughout the area. 14 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 11. LIGHT AND GLARE a. What type of light or glare will the proposal produce? What time of day would it mainly occur? I!N]Ql It is expected that interior lighting will be visible through windows during early evening and morning hours. Exterior lighting in this development is minimal and decorative only. Reflections may be produced by window glazing under certain weather conditions, but no mirror glass is proposed. b. Could light or glare from the finished project be a safety hazard or interfere with views? I!N]Ql It is not expected that light or glare from the proposed project will be a safety hazard or interfere with views. c. What existing off-site sources of light or glare may affect your proposal? I!N]Ql An existing street light is located in the right-of-way near the project site. This light will be relocated and is expected to remain near the project site. other nearby light sources include the multifamily developments and single-family residences to the north and east. It is not anticipated that these light sources will negatively impact the project. d. Proposed measures to reduce or control light and glare impacts, if any: I!N]Q} All exterior lighting fixtures will be directed downward and shielded to minimize light pollution. No site lighting is proposed. 12. RECREATION a. What designated and informal recreational opportunities are in the immediate vicinity? I!N]Ql The nearest public open space and recreational facilities appear to be located at Highlands Elementary School, approximately half a mile from the site. Windsor Hills Park is located approximately one mile away. Neighbors have also expressed that the vegetated area between the project site and Interstate 405 is often used as an informal recreational area. b. Would the proposed project displace any existing recreational uses? If so, describe. I!N]Ql No. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: I!N]Ql The project proposal includes a children's play area, common open space with seating and private yards for some units. All units are also provided with balconies and decks. 15 H:\CEO\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 13. HISTORIC AND CULTURAL PRESERVATION a. Are there any buildings, structures, or sites, located on or near the site that are over 45 years old listed in or eligible for listing in national, state, or local preservation registers located on or near the site? If so, specifically describe.~ No. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Is there any material evidence, artifacts, or areas of cultural importance on or near the site? Please list any professional studies conducted at the site to identify such resources.~ No landmarks or material evidence of archaeological significance have been observed. c. Describe the methods used to assess the potential impacts to cultural and historic resources on or near the project site. Examples include consultation with tribes and the department of archeology and historic preservation, archaeological surveys, historic maps, GIS data, etc. ~ The WISAARD database has been consulted. d. Proposed measures to avoid, minimize, or compensate for loss, changes to, and disturbance to resources. Please include plans for the above and any permits that may be required. No cultural resources have been located on the project site. 14. TRANSPORTATION a. Identify public streets and highways serving the site or affected geographic area and describe proposed access to the existing street system. Show on site plans, if any.~ The site is served by Sunset Boulevard NE. It also abuts, but is not served by, Interstate 405. Access to Sunset Boulevard is provided by a single curb cut as shown on the site plan. b. Is the site or affected geographic area currently served by public transit? If so, generally describe. If not, what is the approximate distance to the nearest transit stop?~ No transit currently serves the immediate area of the project site. The nearest transit stop is located at the intersection of NE 7th Street and Edmonds Avenue NE, approximately a quarter mile away. 16 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/2015 c. How many additional parking spaces would the completed project or non-project proposal have? How many would the project or proposal eliminate?~ 31 new parking spaces will be provided. The site is currently undeveloped, and no parking spaces will be removed. d. Will the proposal require any new or improvements to existing roads, streets, pedestrian, bicycle or state transportation facilities, not including driveways? If so, generally describe (indicate whether public or private).~ A new private woonerf is proposed as part of the project. The project also proposes to dedicate a 9'-6" strip of land along Sunset Boulevard NE for road purposes and install frontage improvements such as a curb and gutter, sidewalk, planter strip and street trees. e. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. J.hrli2l Generally, no. Due to the location of Boeing's facilities and Sea-Tac International Airport, air transportation occurs throughout the Renton area. f. How many vehicular trips per day would be generated by the completed project or proposal? If known, indicate when peak volumes would occur and what percentage of the volume would be trucks (such as commercial and non-passenger vehicles). What data or transportation models were used to make these estimates?~ Traffic analysis has been waived by the project's assigned planner. Trips per day have not been calculated. g. Will the proposal interfere with, affect or be affected by the movement of agricultural and forest products on roads or streets in the area? If so, generally describe. No such traffic exists on streets in the area. h. Proposed measures to reduce or control transportation impacts, if any: ~ As noted above, street dedication and frontage improvement is proposed. The project also proposes surface parking in addition to the dedicated garages to provide off-street parking for the use of guests, delivery vehicles, etc. 15. PUBLIC SERVICES a. Would the project result in an increased need for public services (for example: fire protection, police protection, public transit, health care, schools, other)? If so, generally describe.~ 17 H:\CEO\Oata\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev:08/2015 The proposed project would increase the population of the immediate area, creating a potential increase in the need for public services. Schools, emergency services, fire and police protection, and utilities are all expected to be impacted. Due to the amount of parking provided, it is anticipated that a greater impact will be made on road infrastructure than on public transit. b. Proposed measures to reduce or control direct impacts on public services, if any.JhfilQ] The proposed project will be designed to incorporate emergency vehicle access to all portions of the site. Impact fees will also be paid as required by the City of Renton. 16. UTILITIES a. Check or circle utilities currently available at the site:JhfilQ] ...,I' electricity, } .../ natural gas, Stubs only . .../ water, .../ refuse service, telephone, .../ sanitary sewer, Stub only. septic system, other --------------- b. Describe the utilities that are proposed for the project, the utility providing the service, and the general construction activities on the site or in the immediate vicinity which might be needed.~ As the site is undeveloped, no utility service lines are currently available. The project proposes to construct utilities as shown on the civil site plan. Utilities constructed shall include a water main extension and services, sanitary side sewers, storm drainage collection and detention, electrical services and communication services. Utilities shall be constructed as extensions of publicly-owned and franchise-operated systems, and a utility easement shall be provided as required by utility operators and/or the City of Renton. C. SIGNATURE~ The above answers are true and complete to the best of lead agency is relying on them to make its decision. Position and Agency/Organization: Project Applicant, Citizen Design Collaborative Date Submitted: 01127/2017 ----------- 18 H:\CED\Data\Forms-Templates\Self-Help Handouts\Planning\envchecklist.doc Rev: 08/201S Preliminary Technical Information Report Renton 701 Townhomes lfrntl1n 701 Townhomes a Planned Unit Development Prepared: October 26, 2016 Revised January 27, 2017 DCI Project: 15375 Duncanson Company, Inc. 145 SW 155" Street, Suite IU2 Seattle, Washington 98166 (206) 244-4141 DCI l.'i"i7'i Table Of Contents 1. Project Overview Figure 1.1 -Technical Information Report Worksheet Figure 1.2 -Vicinity Map Figure 1.3 -Basin Map Figure 1.4 -Soils Survey Map 2. Conditions and Requirements Summary 3. Offsite Analysis Figure 3.1 -Offsite Analysis Map 4. Flow Control and Water Quality Facility Analysis and Design Figure 4.1 -?redeveloped Basin Map Figure 4.2 -Postdeveloped Basin Map 5. Conveyance System Analysis and Design 6. Special Reports and Studies 7. Other Permits 8. CSWPPP Analysis and Design 9. Bond Quantities, Facility Summaries, and Declaration of Covenant 10. Operations and Maintenance Manual NOTE: Sections 5, 7, 8, 9 and 10 will be completed at the building permit stage. 11.emon 7111 Im, nh<1me, !)(115375 1. Project Overview l{~nlon 701 io,~nhllmt', llCl 15375 1. Project Overview The proposed Renton 701 Townhomes project is located at 701-707 Sunset Blvd NE in Renton, WA (tax lot 311990-0011 & -0010 & -0005). The existing parcel is 39,187 SF or 0.90 acres. Approximately 1,943 SF of right-of-way will be dedicated along Sunset Boulevard and improved with minor widening, a planter strip and a sidewalk. This work will involve less than 2,000 SF of new impervious surface and is not considered in this analysis. The Project Site basin area is 37,244 SF or 0.86 acres. The Site is bordered to the north by apartments, to the east by Sunset Blvd NE, to the south and west by forested PSE right-of-way. The project will access Sunset Blvd NE via a new public drive extending west into the site. The site was previously improved with a small building with a paved and gravel access drive. Fill was also placed on the property to create a terraced area even with Sunset Boulevard. The building has been removed; however, the pavement and gravel areas remain in an unmaintained condition. The remainder of site is covered by trees, blackberry bushes, and grass. The USGS Soil Map identifies site soils to be Alderwood gravelly sandy loam and Ragnar-Indianola soils (Figure 1.4). Sanitary sewer exists along the western margin of the site. Water, and storm drainage systems are located within the Sunset Blvd NE right-of-way. Runoff from the existing Site generally sheet flows west through the PSE right-of-way and ultimately into the ditch and pipe system along Interstate 405. The project includes construction of 15 townhouse units in duplex to 5-plex configurations. A new internal road and sidewalk will provide access to the units. A stonn drain will collect runoff from the access drive, roof surfaces and some landscape areas. Sewer and water services and dry utilities will be stubbed to the new units. . Included are Figures 1.1 -Technical Information Report Worksheet, 1.2 -Vicinity Map, 1.3 - Soils Map Renton 70 I Townhom::~ DC[ 15375 KING COUNTY, WASHINGTON, SURFACE WATER DES!Gl\ MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 1 PROJECT OWNER AND PROJECT ENGINEER Project Owner Jot+cl'lha."'1 1 LLC Phone yz..5-i'f8-2300 Address so i lb'"" A11, s E. fr£ 1lt , g,J/ e VLi<:1 WA <iu~._._OQ""'----4..___ __ Project Engineer J-/ci f.;, id Q,..., u., n J<>l\ Company t2,. hl<U1J on Lo Phone 206 -2 Part 3 TYPE OF PERMIT APPLICATION Qsl Landuse Services Subdivison / Short Subd. 1§ D Building Services M/F / Commerical / SFR D Clearing and Grading D Right-of-Way Use D Other Part 5 PLAN AND REPORT INFORMATION Technical Information Report Type of Drainage Review ~ / Targeted I (circle): arge Site Date (include revision :c/u[th dates): Date of Final: Part 6 ADJUSTMENT APPROVALS Part 2 PROJECT LOCATION AND DESCRIPTION Project Name Wl<»l Joi lov>nhon,c( DDES Permit# ---------- Location Township 2?N Range 5t Section _ __;l=8,___ __ _ Site Address ".JOl-70".1-S'i..01)c.+ J?j.J 1/£ o?~~1-o-WA "1K05b ' Part 4 OTHER REVIEWS AND PERMITS D DFWHPA D Shoreline D COE 404 Management D DOE Dam Safety ~ Structural D RockeryNaulU __ FEMA Floodplain D ESA Section 7 D COE Wetlands D other Site Improvement Plan (Engr. Plans) Type (circle one): <§II), Modified I Small Site Date (include revision {Ol-zhllfo dates): Date of Final: Type (circle one): Standard / Complex / Preapplication / Experimental/ Blanket Description: (include conditions in TIR Section 2) Date of Aooroval: 2009 Surface Water Design Manual 1 1/9/2009 KING COUI\TY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 7 MONITORING REQUIREMENTS Monitoring Required: Yes,€) Describe: Start Date: Completion Date: Part 8 SITE COMMUNITY AND DRAINAGE BASIN Community Plan : Gn-Y Clf:: b~ Special District Overlays:----------------------- Drainage Basin: CiZ Qf'1!-):'.,...i,aL., J Li<. 't/11s-< ,../<.,,'or( • Stormwater Requirements: Part 9 ONSITE AND ADJACENT SENSITIVE AREAS CJ River/Stream --------- CJ Lake CJ Wetlands -----------CJ Closed Depression _______ _ CJ Floodplain---------- CJ Other __________ _ Part 10 SOILS CJ Steep Slope --------- CJ Erosion Hazard -------- CJ Landslide Hazard ______ _ CJ Coal Mine Hazard ______ _ CJ Seismic Hazard _______ _ CJ Habitat Protection-------CJ _________ _ Soil Type Slopes Erosion Potential l'l,i'IO.r · Ivid,g,1wl« ..,,Jel,d-c, Jt-ecn h' b ~woc.J ) ' 'Y CJ High Groundwater Table (within 5 feet) CJ Sole Source Aquifer CJ Other CJ Seeps/Springs CJ Additional Sheets Attached 2009 Surface Water Design Manual 1/9/2009 2 KING COUNTY, WASHINGTON, SURFACE WATER DESIG:-.1 MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 11 DRAINAGE DESIGN LIMITATIONS REFERENCE LIMITATION/ SITE CONSTRAINT I;$ Core 2 -Offsite Analysis HU± D Sensitive/Critical Areas D SEPA D Other D D Additional Sheets Attached Part 12 TIR SUMMARY SHEET (provide one TIR Summary Sheet per Threshold Discharge Area) Threshold Discharge Area: I (name or descriotion) Core Requirements (all 8 apply) Discharae at Natural Location Number of Natural Discharae Locations: I Offsite Analysis Level: 01213 dated: 10'-I., Flow Control Level: ~i 2 / 3 or Exemption Number (incl. facility summary sheet) Small Site MPs ~es ' = C...-,,P• ,.rr Conveyance System Spill containment located at: vL.o.J ,.. "at='-,er Erosion and Sediment Control ESC Site Supervisor: Contact Phone: After Hours Phone: Maintenance and Operation Responsibility: Private / Public If Private, Maintenance Loa Reauired: Yes I No Financial Guarantees and Provided: Yes / No Liabilitv Water Quality Type: t~ / Sens. Lake / Enhanced Basicm I Bog (include facility summary sheet} or Exemptio o. Landscape Manaaement Plan: Yes / No Special ReQuirements (as aoolicable) Area Specific Drainage Type: CDA I SDO / MOP I BP/ LMP / Shared Fae. I None Reauirements Name: Floodplain/Floodway Delineation Type: Major I Minor I Exemption / None 100-year Base Flood Elevation (or range}: Datum: Flood Protection Facilities Describe: Source Control Describe landuse: (comm./industrial landuse} Describe any structural controls: 2009 Surface Water Design Manual 3 11912009 KING COUNTY, WASHINGTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Oil Control High-use Site: Yes / No Treatment BMP: Maintenance Agreement: Yes / No with whom? Other Drainaae Structures Describe: Part 13 EROSION AND SEDIMENT CONTROL REQUIREMENTS MINIMUM ESC REQUIREMENTS MINIMUM ESC REQUIREMENTS DURING CONSTRUCTION AFTER CONSTRUCTION ~!earing Limits [I} Stabilize Exposed Surfaces ~over Measures CJ""Remove and Restore Temporary ESC Facilities erimeter Protection G'c1ean and Remove All Silt and Debris, Ensure ~raffic Area Stabilization Operation of Permanent Facilities ~ Sediment Retention D Flag Limits of SAO and open space 13'" Surface Water Collection preservation areas D Other [!;I' Dewatering Control ~ust Control Flow Control Part 14 STORMWATER FACILITY DESCRIPTIONS /Note: Include Facilitv Summarv and Sketch) Flow Control Tvne/Descriotion Water Qualitv Tvne/Descriotion ~Detention 'T Ar/K,, D Biofiltration D Infiltration D Wetpool D Regional Facility ~edia Filtration ~ fl<..IT::7L D Shared Facility D Oil Control lijJ Flow Control f.i::.'~l..fi:P D Spill Control BMPs r-am'l',rif D Flow Control BMPs D other D other 2009 Surface Water Design Manual 1/9/2009 4 KING COlJKTY, WASH!l\GTON, SURFACE WATER DESIGN MANUAL TECHNICAL INFORMATION REPORT (TIR) WORKSHEET Part 15 EASEMENTS!TRACTS Part 16 STRUCTURAL ANALYSIS a-Drainage Easement 0 Cast in Place Vault ca' Covenant D Retaining Wall 0 Native Growth Protection Covenant 0 Rockery> 4' High D Tract D Structural on Steep Slope D Other D Other Part 17 SIGNATURE OF PROFESSIONAL ENGINEER I, or a civil engineer under my supervision, have visited the site, Actual site conditions as observed were incorporated into this worksheet and the attached Technical Information Report. To the best of my knowledge the information P\Oyided e is accurate. I.., tD IZ6 JI::, 2009 Surface Water Design Manual 1/9/2009 5 VICINITY MAP NOT TO SCALE e DUNCANSON COMPANY, INC. Civil Engineering Surveying land Planning 145 SW 155th Street, Suitf' /02 Seattle, Washington ()f/Jf,(i Phone 206.244.4/41 Fax 20fi.244.4455 FIGURE 1.2 -Vicinity Map Scale: NTS Drawn: HMO Job No. 15375 $011 M c1p-Km9 County Arna Washtngton '-',apScJIII! 1:5,350f :;1"1tcdtnt..~(ll'":,,6.5";:;IQ.\. ,------~-----so 100 200 n "" 0 250 500 :oo:i 151.1J "'<Ucroploi:~Mc,l'.a!)" C.:.TO'~ ~\G.'58-1 eorro·I.JTM 7J:N>ION "'~ Nat ural Resources Conservation Service Map Unit Legend Web Sod Survey Nalional Coopera!Jve Soil Sur,,ey King County A,-, WH h klgton (WM33) """" '""' I i ~ ~ ; i ~ ; i •.•NUN """' "''"" ' " ~ 10124 12016 P3ge 1 of 3 Map Unit Symbol MapUnltNflffle AcrH In A ot Perc:entotAOI AgC Al<F Roe RdE u, To1al• for A re.a o f lnteres1 AJoorv.·ood grav<il}' soridy k).)m. 8 lo 15 pti1Cflll1Sk>pes AldMrv.'CJOd ~nu K11s.ip so.ls. 11ery sleep R&gMr-lM,ano a aMOC.ial on stop1ns; Rag"l,u-lnd,ano,a .Jssocla! on. maderatttly steep Urt»ln l.;1ntl 2'. 1 9 3'9 ,. 67 0 138.1 • S<.:ak: NTS 180% 1 ~·:.. 260% 6 1·~ 485"9 100.0% D U N C A N S O N C O M P A N Y, I N C Ci,·il Eng ineering Sun t'ying Land Planning 145 SW I 55 1h S1r<'<'T. Suite /02 Sea11/e. Washingf{)n 98/66 Phone 206.2./4.4 /4/ Fax 206.2 ./4.4455 FTCi UR E 1.3 -Soi l Map Dra\vn: HMO Job No. 153 75 2. Conditions and Requirements Summary Renton 70! To"nhomes DCI 15375 2. Preliminary Conditions and Requirements Summary Following is a discussion of how the Project will conform to the Core and Special Requirements of the 2009 King County Surface Water Design Manual (KCSWDM) and the City of Renton Amendments. King County Surface Water Design Manual Core Requirements: 1. Discharge at the Natural Location Runoff will continue to flow to the west toward the PSE and 1-405 right-of-way. After detention, runoff will be discharged onto a rock pad. Project runoff will be discharged at a location where downstream slopes are less than 15% for a distance of at least 50 feet. Some landscape/vegetated areas will continue to sheet flow to the west. 2. Offsite Analysis A Level 1 offsite analysis has been perfonned for this project. See Section 3 for more infonnation. 3. Flow Control The Site is within Renton's Peak Rate Flow Control Standard area. A detentions tank is proposed to control flow rates to match the existing conditions for the 2-, 10-, and 100-year storm events. Onsite storm water management BMPs are proposed in the form of Restricted Footprint. See Section 4 for more information. 4. Conveyance System Conveyance will consist of roof drain collectors and 12-inch pipes. Detailed analysis of the conveyance system will be prepared at the final engineering/building permit stage. 5. Erosion and Sediment Control Erosion and sediment control issues and plans will be addressed at the final engineering stage. 6. Maintenance and Operations The property owners will be responsible for maintenance of the individual detention system and water quality facility. 7. Financial Guarantees and Liability The project owner will provide financial guarantees and liability insurance for construction of the improvements. 8. Water Quality Basic Water Quality treatment will be provided in the form of a Stormfilter. The project is attached single-family, which could be interpreted as multi-family. However, a leachable metal restrictive covenant will be recorded, so that the Project will meet Exception #4 of the Enhanced Basic Water Quality requirement. A nominal amount of New PGIS (1,670 SF) associated with the frontage improvements will remain untreated. Kenton 70 I T ownhomes DCl 1537S King County Surface Water Design Manual Special Requirements: (w/City of Renton Amendment) I. Other Adopted Area-Specific Requirements No Area-Specific Requirements have been identified. 2. Flood Hazard Area Delineation This site does not contain and 1s not adjacent to a flood hazard area; therefore, this requirement does not apply. 3. Flood Protection Facilities This project does not rely on and does not propose to modify or construct a flood protection facility; therefore, this requirement does not apply. 4. Source Control A detailed Construction Stormwater Pollution Prevention Plan (CSWPPP), including appropriate source controls will be prepared for initial site development activity in accordance with the 2009 KCSWDM. CSWPPPs will also be part of the building permits for each lot. 5. Oil Control This project is not a high use site; therefore, this requirement does not apply. 6. Aquifer Protection Area Per Reference 11-8 of the City of Renton Amendment, this project site is not within and Aquifer Protection Area. Renton 701 Townhomes 1)(:11.5375 3. Offsite Analysis Ren\On 701 To"nht>m~s IJCI 15315 3. Offsite Analysis Task 1 -Study Area Definition & Maps The study area is defined as the upstream contributing area located west of the Site and the downstream area extending 1 mile from the Project Site. Task 2 -Resource Review 1. Adopted Basin Plan, Basin Reconnaissance Summary Reports No special basin plan requirements were identified through the pre-application process. 2. FE!v!A Maps The Site is entirely within Zone X. The FEMA map did not reveal any problems. 3. Offsite Analysis Reports Finalized Drainage Studies No other offsite analyses were reviewed. 4. Sensitive Area Folio The Site has been identified as an Erosion Hazard and Landslide Area by City of Renton GIS, based on the much of the site slopes exceeding 15%. A steep slope exists along the western margin of the site; however, this was created by past filling activity. This slope is proposed to be reduced to 15 feet or less in height so as to not be a regulated slope. Project runoff will be discharged at a location where downstream slopes are less than 15% for a distance of at least 50 feet. 5. Drainage Complaints and Studies No downstream complaints have been identified for this Site. 6. Road Drainage Prob/ems None noted. 7. King County Soils Survey The USGS Soil Map identifies site soils to be Alderwood gravelly sandy loam and Ragnar- Indianola soils (Figure 1.4). The soil map did not identify any drainage related problems. 8. Wetlands Inventory NIA 9. Migrating River Studies No channel migration hazard areas are within the study area. 10. WSDOE Clean Water Act Section 303d WSDOE Water Quality Assessment for Washington map was accessed on 10/25/16. The map indicate that John's Creek, approximately V. mile downstream from the Site, is impaired for temperature, bacteria and dissolved oxygen. No mitigation is required at this time. 11.~nton 7111 lov.nh,)mes DCI 15375 11. King County Designated Water Quality Problems There are no King County identified water quality problems listed in the 2009 KCSWDM Reference Section IO posted on King County's Surface Water Design Manual website. 12. Stormwater Compliance Plans NIA Task 3 -Field Reconnaissance A field reconnaissance was conducted on November 19, 2015, (weather conditions were partly cloudy and dry). No evidence of flooding or erosion problems were observed. The upstream runoff is intercepted by a private drainage system to the north and Sunset Boulevard to the east. The resource review did not identify any conditions that warranted extended field review beyond a '!. mile downstream. Task 4 -Drainage System Description And Problem Screening See Figure 3.1 -Offsite Analysis Map Runoff exists the property and flows northwest through PSE right-of-way down a well vegetated slope of less than 15% for at least 50 feet. Runoff continues west for another 200 feet through the PSE and I-405 rights-a-way consisting of well vegetated natural and constructed slopes. At the toe of the l-405 right-of-way cut embankment, runoff enters the stormwater conveyance system in Interstate 405. Safety concerns precluded direct inspection of the 1405 conveyance system; however Renton GIS runoff is conveyed north in a pipe system for approximately 950 feet, near the vicinity of where John's Creek is conveyed under 1-405. The 1-405 piped conveyance system appears to turn west at this location and convey runoff down the west slope of the right-of-way and combine with the piped flow of John's Creek. This point of combination is at or beyond the '!. mile downstream point from the Site. Task 5 -Mitigation of Existing or Potential Problems The project will provide Peak Rate Flow Control. No problems were identified that would warrant a higher level of flow control or additional mitigation. It is Duncanson Company's opinion from the available infonnation that the developed Site will not create or aggravate any downstream problems. Renton 70 I Townhome.s DC! 15375 • D U NC A N SO N CO MPANY, IN C. Ci vi l Engint'ering S un eying La nd Plann ing 145 S W l 55rh Srreer. Suire /02 Seurr le. IVwhingron 'Iii //Iii Phone 2111\.24-1.4 f.J I Fax 211624 ./.4./55 F IGURE 3.1 -Offs itc Ana lys is Map Scale: NTS Drawn: HMD Job No. 15375 4. Flow Control Analysis and Design Rentnn 701 Tov,.nhnm~s I)( I 15l7:\ 4. Flow Control and Water Quality Facility Analysis and Design Part A -Existing Site Hydrology The Site has been previously graded and filled, and was historically developed with a small building. Asphalt and crushed rock surfacing remain in the central, eastern portion of the site. These surfaces were modeled in their existing condition as impervious. A large portion of the Site is covered with brush, blackberries and only a few trees. These areas were modeled as 50% pasture and 50% forested. The slope in the south and western margin of the site is covered with small to medium size deciduous alder and maple trees. This portion of the Site was modeled as forested. Site soils consist of fill underlain by till; therefore, till soil conditions were assumed for storrnwater modeling. See Figure 4.1-Predeveloped Conditions for delineation of these areas. KCRTS input parameters are tabulated below. Land Type Acre lmoervious 0.20 Till Forest 0.40 Till Pasture 0.27 Total 0.87 Results A time series file was generated for the predeveloped conditions stated above, using SeaTac Region, scale factor 1.00, reduced record and hourly time steps. The time series files for the predeveloped basin has the following peaks: Flow Frequency Analysis Time Series File:predev.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- Flow Rate Rank Time of Peak (CFS) 0.079 5 2/09/01 2:00 0.056 7 1/05/02 16:00 0.091 2 2/27/03 7:00 0.051 8 8/26/04 2:00 0.061 6 10/28/04 16:00 0.086 3 1/18/06 16:00 0.080 4 11/24/06 3:00 0.156 1 1/09/08 6:00 Computed Peaks Renton 70 I T ownhomes -----Flow Frequency Analysis------- --Peaks Rank Return Prob (CFS) Period 0.156 1 100.00 0.990 0.091 2 25.00 0. 960 0.086 3 10.00 0.900 0.080 4 5.00 0.800 0. 07 9 5 3.00 0.667 0.061 6 2.00 0.500 0.056 7 1. 30 0.231 0.051 8 1. 10 0.091 0.134 50.00 0.980 IJCI l 5.l75 LEGEND ; :; ) :; ; l ~ ~ m A1MP IMPERVIOUS AFC FOREST ApF 50% PASTURE/50% FOREST Yi § i'if ' t• Cl') / § Cl) I wi _'::: I t, "' SITE 8,684 SF 0.20 AC ' ' ' ' ! I I SITE 5,485 SF 0.13 AC (+ 0.27 = 0.40 AC) SITE 23,376 SF 0.54 AC (50% = 0.27 AC) SITE BASIN LIMITS 37,545 SF 0.87± AC a GRAPHIC SCALE (IN FEET) I inch~ 40 IL DUNCANSON COMPANY, INC. Civil Engineering Sunc:ying !.anJ !'Janning 145 SW 155th Stn:et, Suite 102 Seattle, Washington 91'166 Phrme 206.244.4 l 41 Fax 206.244.4455 Fig 4.1 Pre-Developed Basin Map Scale: I "=40' Drawn: HMD I Job No. 15375 Part B -Developed Site Hydrology Project development will result in the addition of 23,280 SF of new and/or replaced impervious surface in the form of roof, patio, road and driveway. The remainder of the site was modeled as landscaping (till grass). The western edge of the property will continue to sheet flow to the west and not be collected. This area was modeled as a bypass basin. There is 0.06 acres of pervious pavers on the site, which were modeled as 50% till grass and 50% impervious. See Figure 4.2-Postdeveloped Conditions for delineation of these areas. KCRTS input parameters are tabulated below. Land Tvne AC lmoervious 0.45 Till Grass 0.15 Bypass Till Grass 0.25 Total 0.85 Results The postdeveloped, BMP-credited time series files was generated using Seatac Region, scale factor 1.00, reduced record and hourly time steps. The time series files for the two postdeveloped basins computed the following peaks: Site (undetained) Flow Frequency Analysis Time Series File:postdev.~sf Project Location:Sea-Tac ---Annual Peak Flow Rates--- Flow Rate Rank Time of Peak (CFS) 0.145 6 2/09/01 2:00 0.123 8 1/05/02 16:00 0.174 3 12/08/02 18:00 0 .137 7 8/26/04 2:00 0.164 4 10/28/04 16:00 0.155 5 1/18/06 16:00 0.200 2 10/26/06 0:00 0.289 1 1/09/08 6:00 Computed Peaks R~nton 70 I l ,)wnhome~ -----Flow Frequency Analysis------- --Peaks Rank Return Prob (CFS) Period 0.289 1 100.00 0.990 0.200 2 25.00 0. 960 0 .174 3 10.00 0.900 0.164 4 5.00 0.800 0.155 5 3. 00 0.667 0.145 6 2.00 0.500 0.137 7 1. 30 0.231 0.123 8 1. 10 0.091 0.260 50.00 0.980 IJ('I l.'H75 Bypass Basin Flow Frequency Analysis Time Series File:postbypass.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- Flow Rate Rank Time of Peak (CFS) 0.015 4 2/09/01 2:00 0.008 7 1/05/02 16:00 0.020 2 2/27/03 7:00 0.003 8 3/24/04 19:00 0.009 6 1/05/05 8:00 0.015 3 1/18/06 16:00 0.014 5 11/24/06 3:00 0.036 1 1/09/08 6:00 Computed Peaks Combined undetained Site and Bypass Flow Frequency Analysis Time Series File:postcombo.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--- Flow Rate Rank Time of Peak (CFS) 0.160 6 2/09/01 2:00 0.130 8 1/05/02 16: 00 0.193 3 2/27 /03 7:00 0.141 7 8/26/04 2:00 0.170 5 10/28/04 16:00 0.170 4 1/18/06 16:00 0.205 2 10/26/06 0:00 0. 326 1 1/09/08 6:00 Computed Peaks -----Flow Frequency Analysis------- --Peaks Rank Return Prob (CFS) Period 0.036 1 100.00 0.990 0.020 2 25.00 0.960 0.015 3 10.00 0.900 0.015 4 5.00 0.800 0.014 5 3.00 0.667 0.009 6 2.00 0.500 0.008 7 1. 30 0.231 0.003 8 1.10 0.091 0.031 50.00 0.980 -----Flow Frequency Analysis------- --Peaks Rank Return Prob (CFS) Period 0. 32 6 1 100.00 0.990 0.205 2 25.00 0. 960 0.193 3 10.00 0.900 0 .170 4 5.00 0.800 0 .170 5 3.00 0.667 0.160 6 2.00 0.500 0.141 7 1. 30 0.231 0 .130 8 1.10 0.091 0.285 50.00 0.980 Note the combined 100-year peak flow increase is > 0.1 CFS confirming that a flow control facility is required. Renton 701 fo1>,nhrnnes DC] 15375 ~ LEGEND I ................. I ········-······ , .. . . ·······-....... . .............. ............ ·.-.-:. 1:::::::::::::::: I 1( )( )( )( )9 kYXREEE2?Xl I>>>>>>> 1 ~M AiMP.P. IMPERVIOUS PAVEMENT SITE 5,595 SF 0.13 AC AP.P. PERVIOUS PAVERS SITE 2,805 SF 0.06 AC A1MP.B. IMPERVIOUS ROOF SITE 12,712 SF 0.29 AC ArG TILL GRASS SITE 5,146 SF 0.12 AC A8 rn BYPASS TILL GRASS SITE 10,988 SF 0.25 AC BYPASS LIMITS 10,988 SF 0.25 AC SITE BASIN LIMITS 37,244 SF 0.86 AC ~~ £2 ii} /... iJ1 § Cl) i I I i / I ! e GRAPHIC SCALE ~o (IN rEFT) I inch ~ 40 ft. DUNCANSON COMPANY, INC Civil Engineering Surveying 1.an<l Plannrn)! 145 srv 155th Street, Suite 102 Seattle, WashinKron 98166 Phone J(){j 244.4141 Fax 206244.4455 Fig 4.2 Post-Developed Basin Map Scale: l "=40' Drawn: HMD I Job No. 15375 Part C -Performance Standards The City of Renton specifies Peak Rate Flow Control and Basic Water Quality treatment as the required performance standards for this Site. Part D -Flow Control Systems BMPs Per the KCSWDM, the individual Site or Lots are required to have Flow Control BMPs. Full Dispersal is not considered feasible due to lack of available flow paths. Due to fill and till soils and slope considerations, infiltration was also deemed infeasible. Flow control BMPs are proposed to take the form permeable pavers for the internal site walkways. The individual lots sizes vary from 740 SF to 910 SF, which fall in the small lot category, requiring mitigation of at least 10% of the Site/Lot areas. There are penneable pavers adjacent to each lot. The sum of all the lot areas is 12,236 SF. There is approximately 2,805 SF of permeable pavers proposed. This averages out to 23% of the Site/Lot areas, thereby satisfying the BMP requirement. Flow Control Facility A detention tank was selected to provide flow control. Multiple iterations of level pool routing were run using KCRTS to find an acceptable configuration. An 80-foot long by 10-foot diameter detention tank was found to achieve the required performance including combination of the bypass runoff for downstream point of compliance. Additional iterations at the final design stage will likely result in a smaller storage facility. KCRTS detention sizing results are provided below. Rcnlon 70 I T,m·nhnmc, IJCI 15375 Retention/Detention Facility Type of Facility: Detention Tank Tank Diameter: 10.00 ft Tank Length: 80.00 ft Effective Storage Depth: 9.50 ft Stage O Elevation: Storage Volume: Riser Head: Riser Diameter: Number of orifices: 154.00 ft 6166. cu. ft 9.50 ft 12.00 inches 2 Full Head Pipe Orifice# Height (ft) 0.00 4.50 Diameter (in) 0.88 0. 63 Discharge Diameter 1 2 (CFS) (in) 0.065 0.024 4.0 Top Notch Weir: None Outflow Rating Curve: None Stage (ft) a.co 0.01 O.C2 O.C3 O.C4 O.C5 O.C6 0. C7 0.23 0.40 0.56 0. 72 0.88 1. 04 1. 20 1. 36 1. 52 1. 68 1. 84 2.01 2.17 2.33 2.49 2.65 2.81 2. 97 3.13 3.29 3.45 3.62 Renton 701 To..,,nhomes Elevation (ft) 154.00 154.01 154.02 154.03 154.04 154.05 154.06 154.07 154.23 154.40 154.56 154.72 154.88 155.04 155.20 155.36 155.52 155.68 155.84 156. 01 156.17 156. 33 156.49 156.65 156.81 156.97 157.13 157.29 157.45 157.62 (cu. Storage ft) (ac-ft) 0. 0.000 4. 7. 11. 14. 18. 22. 25. 88. 163. 239. 320. 4 0 6. 4 97. 591. 689. 790. 8 94. 1001. 1118. 1230. 1344. 14 61. 1579. 1698. 1820. 1942. 2066. 2190. 2324. 0.000 0.000 o.oco o.oco 0.000 o.oco O.OCl 0. 002 0. 004 0.005 0. 007 0.009 0. 011 0.014 0.016 0.018 0.021 0.023 0.026 0.028 0.031 0.034 0.036 0.039 0.042 0.045 0.047 0.050 0.053 Discharge (cfs) 0.000 0.002 0.003 0.003 0.004 0.005 0.005 0.006 0.010 0. 013 0. 016 0.018 0.020 0.021 0.023 0.025 0. 02 6 0. 027 0.029 0.030 0.031 0.032 0.033 0.034 0.035 0.036 0.037 0.038 0.039 0.040 Percolation (cfs) 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 DCI 15375 3.78 157.78 2450. 0.056 0.041 0.00 3.94 157.94 2577. 0.059 0.042 0.00 4.10 158.10 2705. 0.062 0.043 0.00 4.26 158.26 2832. 0.065 0.043 0.00 4.42 158.42 2960. 0.068 0.044 0.00 4.50 158.50 3024. 0.069 0.045 0.00 4.51 158.51 3032. 0.070 0.045 0.00 4.52 158.52 3040. 0.070 0.045 0.00 4.53 158.53 3048. 0.070 0.047 0.00 4.54 158.54 3056. 0.070 0.047 0.00 4.55 158.55 3064. 0.070 0.047 0.00 4.71 158.71 3192. 0.073 0.051 0.00 4.87 158.87 3320. 0.076 0.053 0.00 5.04 159.04 3455. 0.079 0.055 0.00 5.20 159.20 3582. 0.082 0.057 0.00 5.36 159.36 3709. 0.085 0.059 0.00 5.52 159.52 3834. 0.088 0.060 0.00 5.68 159.68 3959. 0. 091 0. 062 0.00 5.84 159.84 4083. 0. 094 0.063 0.00 6.00 160.00 4206. 0. 097 0.065 0.00 6.16 160.16 4327. 0.099 0.066 0.00 6.32 160.32 4447. 0.102 0.067 0.00 6.48 160.48 4566. 0.105 0.069 0.00 6.65 160.65 4690. 0.108 0.070 0.00 6.81 160.81 4804. 0 .110 0 .071 0.00 6.97 160. 97 4917. 0.113 0.072 0.00 7 .13 161. 13 5027. 0.115 0.074 0.00 7.29 161.29 5134. 0.118 0.075 0.00 7.45 161. 45 5239. 0.120 0.076 0.00 7.61 161. 61 5341. 0.123 0.077 0.00 7. 77 161. 77 5439. 0.125 0.078 0.00 7.93 161. 93 5534. 0.127 0.079 0.00 8.09 162.09 5626. 0.129 0.080 0.00 8.26 162. 2 6 5718. 0.131 0.081 0.00 8.42 162.42 5800. 0.133 0.082 0.00 8.58 162.58 5876. 0.135 0.083 0.00 8.74 162.74 5947. 0.137 0.084 0.00 8.90 162.90 6012. 0 .138 0.085 0.00 9.06 163.06 6069. 0.139 0.086 0.00 9.22 163.22 6116. 0.140 0.087 0.00 9.38 163.38 6152. 0.141 0.088 0.00 9.50 163.50 6166. 0.142 0.089 0.00 9.60 163.60 6166. 0.142 0.397 0.00 9.70 163.70 6166. 0.142 0. 961 0.00 9.80 163.80 6166. 0.142 1. 690 0.00 9.90 163.90 6166. 0.142 2.480 0.00 10.00 164.00 6166. 0.142 2. 770 0.00 Hyd Inflow Outflow Peak Storage Stage Elev (Cu-Ft) (Ac-Ft) 1 0.29 0.07 7.06 161.06 4975. 0 .114 2 0.20 0.04 3.48 157.48 2215. 0.051 3 0.17 0.05 4.63 158.63 3128. 0.072 4 0.15 0.06 5.59 159.59 3885. 0.089 Rmton 701 Townhornes DCI !5375 5 C.16 0.04 3.07 157.07 1893. 6 0.15 C.C6 5.95 159.95 4166. 7 C.14 C.03 2. 3i; 156.34 1355. 8 C.12 C.03 2.26 156.26 1291. Hyd R/D Facility Tributary Reservoir POC Outflow Outflow Inflow Inflow 1 0.07 0.04 ******** 2 0.04 0.01 ******** 3 0.05 0.02 ******** 4 0.06 0.02 ******** 5 0.04 0.01 ******** 6 0.06 0.02 ******** 7 0.03 0.00 ******** 8 0.03 0.01 ******** ---------------------------------- Route Time Series through Facility Inflow Time Series File:postdev.tsf Outflow Time Series File:Tankout POC Time Series File:DownstreamOut Inflow/Outflow Analysis Peak Inflow Discharge: 0.289 CFS Peak Outflow Discharge: 0.073 CFS Peak Reservoir Stage: 7.06 Ft Peak Reservoir Elev: 161.06 Ft Target ******* ******* ******* ******* ******* ******* ******* ******* at 6:00 at 11: 00 Peak Reservoir Storage: 4 97 5. Cu-Ft 0 .114 Ac-Ft Add Time Series:postbypass.tsf Cale 0.09 0.04 0.06 0.07 0.04 0.08 0.03 0.04 on Jan on Jan 0.043 0. 096 0. 031_ 0.030 9 in Year 8 9 in Year 8 Peak Summed Discharge: 0.093 CFS at 9:00 on Jan 9 in Year 8 Point of Compliance File:DownstreamOut.tsf Flow Frequency Analysis Time Series File:tankout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--------Flow Frequency Analysis------- Flow Rate Rank Time of Peak --Peaks --Rank Return Prob (CFS) (CFS) (ft) Period 0.064 2 2/09/01 19:00 0.073 7.06 1 100.00 0.990 0.032 8 1/05/02 18:00 0.064 5. 95 2 25.00 o. 960 0.049 5 3/06/03 21:00 0.063 5.85 3 10.00 0.900 0.032 7 8/24/04 0:00 0.061 5.59 4 5.00 o.soc 0.039 6 1/05/05 10:00 0.049 4. 63 5 3.CO 0.667 0.061 4 1/18/06 22:00 0.039 3.51 6 2.00 0.500 0.063 3 11/24/06 7:00 0.032 2.34 7 1. 30 0.231 0.073 1 1/09/08 11: 00 0.032 2.26 8 1.10 0. 091 Computed Peaks 0.070 6.68 50.00 0.980 Re11ton 70 I l"m-,nhome, [)("! 15375 Flow Frequency Analysis Time Series File:downstreamout.tsf Project Location:Sea-Tac ---Annual Peak Flow Rates--------Flow Frequency Analysis------- Flow Rate Rank Time of Peak --Peaks Rank Return Prob (CFS) (CFS) Period 0.077 2 2/09/01 18:00 0.093 1 100.00 0.990 0.035 7 1/05/02 18:00 0.077 2 25.00 0. 960 0.058 5 3/06/03 21:00 0.073 3 10.00 0.900 0.032 8 8/24/04 0:00 0.071 4 5.00 0.800 0. 04 6 6 1/05/05 8:00 0.058 5 3.00 0.667 0. 071 4 1/18/06 21:00 0.046 6 2.00 0.500 0. 073 3 11/24/06 6:00 0.035 7 1. 30 0.231 0.093 1 1/09/08 9:00 0.032 8 1.10 0. 091 Computed Peaks 0.088 50.00 0.980 Peak Flow Control Performance Check Storm Event Predeveloped Peak Postdeveloped Peak Downstream POC 2-yr 0.061 0.046 10-vr 0.086 0.073 100-yr 0.156 0.093 Note that the I 00-year peak flow release from the detention tank is only 0.073 CFS, which is well within the allowance for discharge onto a rock pad per Core Requirement# I. Part E -Water Quality System This site is in a Basic Water Quality area. A stormfilter is proposed to provide water quality treatment. Detailed sizing and selection of the stormfilter will be prepared at the building permit stage. Renll>n 701 Townhomes !Kl 15375 6. Special Reports and Studies Renton 7111 Tnwntiorne, DC] 15375 6. Special Reports and Studies A geotechnical engineering report has been prepared by E3RA. A copy of that report 1s included in this Section. Renrun 701 r,m,nh<Jme, DCl l.~17.~ Geotechnical Engineering Report 701 Sunset Blvd NE Renton, Washington P/Ns 311990001, 3119900010, 3119900005 Submitted to: Totenham, LLC Attn: Joe Notarangelo 50 116th Ave SE, Suite 111 Bellevue, Washington 98004 Submitted by: E3RA, Inc. PO Box44840 Tacoma, Washington 98448 (253) 537-9400 April 16, 2015 Project No. 115034 • TABLE OF CONTENTS Page No. 1.0 SITE AND PROJECT DESCRIPTION .................................................................................... 1 2.0 EXPLORATORY METHODS ................................................................................................... 2 2.1 Test Pit Procedures ..................................................................................................... 2 3.0 SITE CONDITIONS ............................................................................................................... 3 3.1 Surface Conditions ....................................................................................................... 3 3.2 Soil Conditions ............................................................................................................. 3 3.3 Groundwater Conditions .............................................................................................. 3 3.4 Seismic Conditions ...................................................................................................... 4 3.5 Liquefaction Potential ................................................................................................ 4 4.0 CONCLUSIONS AND RECOMMENDATIONS......... .. ..................................................... 4 4.1 Site Preparation ........................................ .. ............................................................ 5 4.2 Spread Footings................ . ................................................................. 7 4.3 Slab-On-Grade Floors .................................................................................................. 8 4.4 Asphalt Pavement ........................................................................................................ 8 4.5 Structural Fill ............................................................................................................. 9 5.0 RECOMMENDED ADDITIONAL SERVICES ........................................................................ 10 6.0 CLOSURE ........................................................................................................................... 11 List of Tables Table 1. Approximate Locations and Depths of Explorations List of Figures Figure 1. Topographic and Location Map Figure 2. Site and Exploration Plan APPENDIX A Soil Classification Chart and Key to Test Data ...... . Logs of Test Pits TP-1 through TP-3 ..................... . .............................................................. 2 .. .............................................. A-1 . ............................................. A-2 ... A-4 April 16, 2015 Tl5034 Totenham, LLC 50 I 16th Ave SE, Suite 111 Bellevue, WA 98004 Attention: Subject: Joe N otarangelo Geotechnical Engineering Report 701 Sunset Blvd NE P/Ns3119900011, 3119900010,3119900005 Renton, Washington Dear Mr. Notarangelo: PO Box44840 Tacoma, WA 98448 253-537-9400 253-537-9401 Fax E3RA, Inc. (E3RA) is pleased to submit this revised report describing the results of our geotechnical engineering evaluation for the improvements planned at 701 Sunset Blvd NE in Renton, Washinb>ton. This report has been prepared for the exclusive use of the Totenham, LLC and their consultants, for specific application to this project, in accordance with generally accepted geotechnical engineering practice. 1.0 SITE AND PROJECT DESCRIPTION The project site consists of three separate, but adjacent tax parcels on the west side of Sunset Blvd NE, located directly northwest of its intersection with NE 7th St in Renton, Washington, as shown on the enclosed Topographic and Location Map (Figure I). The subject property contains a frontage on Sunset Blvd NE of approximately 200 feet, and extends west of the roadway± I 25 to 200 feet; encompassingjust under one acre. Currently, the property is undeveloped, with the only distinguishing site feature being a "U" shaped gravel driveway which enters/exits Sunset Blvd NE along the east side of the site. Generally, the easterrnnost two-thirds of the property is relatively level, containing a slight slope from east to west, no steeper than 15 percent. The western third of the site consists of a moderate to steep slope which descends to the west at grades of 50 to 60 percent and represents an elevation change of 15 to 20 feet. Directly west of the subject property is long, thin parcel owned by Puget Sound Enerb'Y, which acts as a pathway for transmission towers which service the area. One such transmission tower is in close proximity to the project area. Areas west of this parcel are steeply sloped, and descend down to 1-405. The western boundary of the site is approximately 200 feet east ofl-405. Improvement plans involve the clearing/stripping of the site and developing IO to 12 townhouses within its confines. Preliminary discussions have the townhouses being three-story, wood-framed structures. Garages will either be attached or detached, with no preliminary layouts available thus far. Paved driving and parking surfaces will also be incorporated into the proposed development. April 16, 2015 T15034 / Totenham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report 2.0 EXPLORATORY METHODS We previously explored surface and subsurface conditions at the project site on January 21, 2015. Our exploration and evaluation program comprised the following elements: • Surface reconnaissance of the site; • Three test pits (designated TP-1 through TP-3), advanced on January 21, 2015; and A review of published geologic and seismologic maps and literature. Table I summarizes the approximate functional locations and termination depths of our subsurface explorations, and Figure 2 depicts their approximate relative locations. The following sections describe the procedures used for excavation of test pits. TABLE 1 APPROXIMATE LOCATIONS AND DEPTHS OF EXPLORATIONS Termination Exploration Functional Location Depth (feet) TP-1 Eastern third of the site, north end of "U" shaped gravel driveway 7Y.i TP-2 Eastern third of the site, south end of "U" shaped gravel driveway 71h TP-3 Centrally within the site, west of the "U" shaped gravel driveway 71h The specific number and locations of our explorations were selected in relation to the existing site features, under the constraints of surface access, underground utility conflicts, and budget considerations. It should be realized that the explorations performed and utilized for this evaluation reveal subsurface conditions only at discrete locations across the project site and that actual conditions in other areas could vary. Furthermore, the nature and extent of any such variations would not become evident until additional explorations are performed or until construction activities have begun. If significant variations are observed at that time, we may need to modify our conclusions and recommendations contained in this report to reflect the actual site conditions. Test Pit Procedures Our exploratory test pits were excavated with a rubber-tracked mini-excavator operated by an excavation contractor under subcontract to E3RA. A geotechnical engineer from our firm observed the test pit excavations, collected soil samples, and Jogged the subsurface conditions. The enclosed test pit logs indicate the vertical sequence of soils and materials encountered in each test pit, based on our field classifications. Where a soil contact was observed to be gradational or undulating, our logs indicate the average contact depth. We estimated the relative density and consistency of the in-situ soils by means of the excavation characteristics and the stability of the test pit sidewalls. Our logs also indicate the approximate depths of any sidewall caving or groundwater seepage observed in the test pits. The soils were classified visually in general accordance with the system described in Figure A-1, which includes a key to the exploration logs. Summary logs of the explorations are included as Figures A-2 through A-4. 2 April 16, 2015 T15034 / Totenham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report 3.0 SITE CONDITIONS The following sections present our observations, measurements, findings, and interpretations regarding, surface, soil, groundwater, and infiltration conditions. Surface Conditions As previously described, the project site consists of three separate but adjacent tax parcels on the west side of Sunset Blvd NE, located directly northwest of its intersection with NE 7th St, in Renton, Washington. It is located on the outskirts of a larger residential development further to the east, and is positioned on the top of a small ridgeline which runs north/south, forming the eastern boundary ofl-405. The eastern two-thirds of the site is relatively level, containing a slight slope (less than 15 percent) from east to west. This portion of the site has limited vegetation, containing only a sparse grass cover and limited gravel surfacing along the "U" shaped driveway. The western third of the site consists ofa moderate to steep slope which descends to the west at grades of 50 to 60 percent and represents an elevation change of 15 to 20 feet. The slope face itself is densely vegetated with thin conifers, blackberry bushes, and other brush, and does not display any irregularities indicating slope failure, such as ancient or recent landslide scarps, hummocks, slide blocks, or jack-strawed trees. The adjacent property to the west is owned by Puget Sound Energy, and acts as a pathway for transmission towers servicing the area. A narrow driveway to this property is located directly south of the project site. The western boundary of the PSE property is marked by a chainlink fence, with areas west of this mark being steeply sloped and directly descend down to 1-405. No hydrologic features were observed on site, such as seeps, springs, ponds and streams. Soil Conditions Our subsurface explorations revealed relatively consistent subgrade conditions across the site. The entirety of the site contains a surface mantle of sod, topsoil, or gravel surfacing, typically no more than 6 inches thick. Underlying this material, a fill zone spans much of the site, typically extending to 4Y, feet below existing grade. The uppermost 3 feet of the fill material is comprised of silty sand in a medium dense in-situ condition. From 3Y, to 4Y, feet below existing grade, logs, woody debris and general refuse were incorporated into the fill material. Native soils on site consist of glacial till deposited during the most recent glaciation of the area; the Vashon Stade of the Fraser Glaciation. Glacial till deposits observed in our subsurface explorations were all moderately weathered and comprised of gravelly, silty sand in a medium dense in-situ condition. Unweathered deposited are likely encountered with depth. In the Geologic Map of the Renton Quadrangle, King County, Washington, as prepared by the Department of the Interior United States Geological Survey (USGS) ( 1965), the project site is mapped as containing Qgt, or Vashon Glacial Till. These deposits are described as being a generally compact, coherent, unsorted mixture of sand, silt, clay and gravel. Our subsurface explorations generally correspond with the mapping performed by the USGS. The enclosed exploration logs (Appendix A) provide a detailed description of the soil strata encountered in our subsurface explorations. 3.3 Groundwater Conditions At the time of our reconnaissance and subsurface explorations (January 21, 2015), we did not encounter groundwater seepage in any of our subsurface explorations which extended to a maximum depth of 71h feet below existing grade. Given the fact that our subsurface explorations were performed in what is generally 3 April 16, 2015 T15034 / Toten ham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report considered the wet season (December through April), we do not anticipate that groundwater levels will rise higher than that which we observed, and we do not anticipate that groundwater will adversely impact the proposed improvements. Seismic Conditions Based on our analysis of subsurface exploration logs and our review of published geologic maps, we interpret the onsite soil conditions to generally correspond with site class D, as defined by Table 20.3-1 in ASCE 7, per the 2012 International Building Code (!BC). Using 2012 !BC information on the USGS Design Summary Report website, Risk Category VII/III seismic parameters for the site are as follows: S,= 1.436 g S"s = 1.436 g Sos= 0.957 g s, = 0.539 g SM]= 0.809 g So,= 0.539 g Using the 2012 !BC information, MCfa Response Spectrum Graph on the USGS Design Summary Report website, Risk Category 1/TJ/Ill, S,at a period of 0.2 seconds is 1.44 g and S,at a period of 1.0 seconds is 0.54g. The Design Response Spectrum Graph from the same website, using the same IBC information and Risk Category, S,at a period of0.2 seconds is 0.96 g and S,at a period of 1.0 seconds is 0.54g. 3.5 Liquefaction Potential Liquefaction is a sudden increase in pore water pressure and a sudden loss of soil shear strength caused by shear strains, as could result from an earthquake. Research has shown that saturated, loose, fine to medium sands with a fines (silt and clay) content less than about 20 percent are most susceptible to liquefaction. Our subsurface explorations did not encounter any loose sand layers or lenses. 4.0 CONCLUSIONS AND RECOMMENDATIONS Improvement plans involve the clearing/stripping of the site and developing 10 to 12 townhouses within its confines. Preliminary discussions have the townhouses being three-story, wood-framed structures. Garages will either be attached or detached, with no preliminary layouts yet available. Paved driving and parking surfaces will also be incorporated into the proposed development. We offer these recommendations: Feasibility: Based on our field explorations, research, and evaluations, the proposed structure and pavements appear feasible from a geotechnical standpoint. Foundation Options: Given the fact that a zone of organic-laden fill material underlies the site and could result in post-construction settlement if not removed, we recommend the over- excavation of the building footprint down to native soils; a depth of approximately 4Y, feet. Foundation elements should be constructed on undisturbed native soils, or on structural fill bearing pads that extend down to native soils. The thickness of structural fill bearing pads, if used, is at the discretion of the developer. Recommendations for Spread Footings are provided in Section 4.2. Floor Options: Floor sections should bear on medium dense or denser native soils or on properly compacted structural fill that extends down to medium dense or denser native soil. We recommend over-excavation of slab-on-grade floor subgrades to a minimum depth of 4 April 16, 2015 T15034 / Totenham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report 4\1, feet. Slab-on-grade floors should either be constructed on undisturbed native soils or on properly compacted struch1ral fill as a floor sub base. If floor construction occurs during wet conditions, it is likely that a geotextile fabric, placed between the structural fill floor subbase and native soils, will be necessary. Recommendations for slab-on-grade floors are included in Section 4.3. Fill underlying floor slabs should be compacted to 95 percent (ASTM:D-1557). Pavement Sections: After removal of any organics underlying pavements, we recommend a conventional pavement section comprised of an asphalt concrete pavement over a crushed rock base course over a properly prepared ( compacted) subgrade or a granular subbase. All soil subgrades should be thoroughly compacted, then proof-rolled with a loaded dump truck or heavy compactor. Any localized zones of yielding subgrade disclosed during this proof-rolling operation should be overexcavated to a depth of 12 inches and replaced with a suitable structural fill material. The following sections of this report present our specific geotechnical conclusions and recommendations concerning site preparation, spread footings, slab-on-grade floors, asphalt pavement, and structural fill. The Washing1on State Department of Transportation (WSDOT) Standard Specifications and Standard Plans cited herein refer to WSDOT publications M4 l-l 0, Standard Specifications for Road, Bridge, and Municipal Construction, and M21-0I, Standard Plansfor Road, Bridge, and Municipal Construction, respectively. 4.1 Site Preparation Preparation of the project site should involve erosion control, temporary drainage, clearing, stripping, excavations, cutting, subgrade compaction, and filling. Erosion Control: Before new construction begins, an appropriate erosion control system should be installed. This system should collect and filter all surface water runoff through silt fencing. We anticipate a system of berms and drainage ditches around construction areas will provide an adequate collection system. Silt fencing fabric should meet the requirements ofWSDOT Standard Specification 9-33.2 Table 3. In addition, silt fencing should embed a minimum of 6 inches below existing grade. An erosion control system requires occasional observation and maintenance. Specifically, holes in the filter and areas where the filter has shifted above ground surface should be replaced or repaired as soon as they are identified. Temporary Drainage: We recommend intercepting and diverting any potential sources of surface or near-surface water within the construction zones before stripping begins. Because the selection of an appropriate drainage system will depend on the water quantity, season, weather conditions, construction sequence, and contractor's methods, final decisions regarding drainage systems are best made in the field at the time of construction. Based on our current understanding of the construction plans, surface and subsurface conditions, we anticipate that curbs, berms, or ditches placed around the work areas will adequately intercept surface water runoff. Clearing and Stripping: After surface and near-surface water sources have been controlled, sod, topsoil, and root-rich soil should be stripped from the site. Our explorations and field observations indicate that the topsoil horizon is typically 6 inches or less in overall thickness. An organic ridden fill zone was encountered from 3Yi to 4\1, feet below existing grade, which will also need to be over-excavated within the proposed building footprint. Stripping is best performed during a period of dry weather. 5 April 16, 2015 T15034 / Toten ham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report Site Excavations: Based on our explorations, we expect that excavations will encounter loose to medium dense silty fill soils and weathered glacial till which can be easily excavated using standard excavation equipment. Dewatering: Groundwater was not observed in any of our test pit explorations which extended to a maximum depth of 7'!, below existing grade. Given the fact that our test pit explorations were performed in what is generally considered the rainy season, we do not anticipate that groundwater levels will rise higher than that which we observed, nor do we anticipate that groundwater will adversely affect the proposed development. If groundwater is encountered, we anticipate that an internal system of ditches, sumpholes, and pumps will be adequate to temporarily dewater excavations. Temporary Cut Slopes: All temporary soil slopes associated with site cutting or excavations should be adequately inclined to prevent sloughing and collapse. Temporary cut slopes in site soils should be no steeper than 1 Y,H:lV, and should conform to Washington Industrial Safety and Health Act (WISHA) regulations. Subgrade Compaction: Exposed subgrades for the foundations of the planned additions should be compacted to a firm, unyielding state before new concrete or fill soils are placed. Any localized zones of looser granular soils observed within a subgrade should be compacted to a density commensurate with the surrounding soils. In contrast, any organic, soft, or pumping soils observed within a subgrade should be overexcavated and replaced with a suitable structural fill material. Site Filling: Our conclusions regarding the reuse of onsite soils and our comments regarding wet-weather filling are presented subsequently. Regardless of soil type, all fill should be placed and compacted according to our recommendations presented in the Structural Fill section of this report. Specifically, building pad fill soil should be compacted to a uniform density ofat least 95 percent (based on ASTM:D-1557). On site Soils: We offer the following evaluation of these onsite soils in relation to potential use as structural fill: • • • Surficial Organic Soil and Organic-Rich Fill Soils: Where encountered, surficial organic soils, like duff, topsoil, root-rich soil, and organic-rich fill soils are not suitable for use as structural fill under any circumstances, due to high organic content. Consequently, this material can be used only for non-structural purposes, such as in landscaping areas. Silty Sand Fill Soils: Much of the site is overlain by 4 feet of fill material. This material contains a high relative fines (percent silt/clay) content and should be considered extremely moisture sensitive. Reuse of this soil type should be limited to summer months and moisture conditioning should be anticipated. Glacial Till: This material type underlies much of the project site and is encountered with depth. These soils are moisture sensitive and will be difficult to reuse during wet weather conditions. Permanent Slopes: All permanent cut slopes and fill slopes should be adequately inclined to reduce long-term raveling, sloughing, and erosion. We generally recommend that no permanent slopes be steeper than 2H:l V. For all soil types, the use of flatter slopes (such as 2'!,H: 1 V) would further reduce long-term erosion and facilitate revegetation. 6 April 16. 2015 E3RA, Inc. T15034 / Totenham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report Slope Protection: We recommend that a permanent berm, swale, or curb be constructed along the top edge of all pem1anent slopes to intercept surface flow. Also, a hardy vegetative groundcover should he established as soon as feasible, to further protect the slopes from runoff water erosion. Alternatively, permanent slopes could be armored with quarry spalls or a geosynthetic erosion mat. 4.2 Spread Footings In our opinion, conventional spread footings will provide adequate support for the new additions if the subgrades are properly prepared. Footing Depths and Widths: For frost and erosion protection, the bases of all exterior footings should bear at least 18 inches below adjacent outside grades, whereas the bases of interior footings need bear only 12 inches below the surrounding slab surface level. To reduce post-construction settlements, continuous (wall) and isolated (column) footings should be at least 18 and 24 inches wide, respectively. Bearing Subgrades: Given the fact that a zone oforganic-laden fill material underlies the site and could result in post-construction settlement if not removed, we recommend the over-excavation of the building footprint down to native soils; a depth of approximately 4Y, feet. Foundation elements should be constructed on undisturbed native soils, or on structural fill bearing pads that extend down native soils and compacted to a density of at least 95 percent (based on ASTM:D-1557). The thickness of structural fill bearing pads, if used, is at the discretion of the developer. If foundation construction occurs during wet conditions, it is possible that a geotextile fabric, placed between the bearing pad and native soils, will be necessary. In general, before footing concrete is placed, any localized zones of loose soils exposed across the footing subgrades should be compacted to a firm, unyielding condition, and any localized zones of soft, organic, or debris-laden soils should be overexcavated and replaced with suitable structural fill. Lateral Overexcavations: Because foundation stresses are transferred outward as well as downward into the bearing soils, all structural fill placed under footings, should extend horizontally outward from the edge of each footing. This horizontal distance should be equal to the depth of placed fill. Therefore, placed fill that extends 24 inches below the footing base should also extend 24 inches outward from the footing edges. Subgrade Observation: All footing subgrades should consist of firm, unyielding, native soils, or structural fill materials that have been compacted to a density of at least 95 percent (based on ASTM:D-1557). Footings should never be cast atop loose, soft, or frozen soil, slough, debris, existing uncontrolled fill, or surfaces covered by standing water. Bearing Pressures: In our opinion, for static loading, footings that bear on a properly prepared subgrade, or structural fill bearing pads can be designed for a preliminary allowable soil bearing pressure of2,000 psf A one-third increase in allowable soil bearing capacity may be used for short-term loads created by seismic or wind related activities. Footing Settlements: Assuming that structural fill soils are compacted to a medium dense or denser state, we estimate that total post-construction settlements of properly designed footings bearing on properly prepared subgrades will not exceed I inch. Differential settlements for comparably loaded elements may approach one-half of the actual total settlement over horizontal distances of approximately 50 feet. 7 April 16, 2015 T15034 / Toten ham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report Footing Backfill: To provide erosion protection and lateral load resistance, we recommend that all footing excavations be backfilled on both sides of the footings and stemwalls after the concrete has cured. Either imported structural fill or non-organic onsite soils can be used for this purpose, contingent on suitable moisture content at the time of placement. Regardless of soil type, all footing backfill soil should be compacted to a density of at least 90 percent (based on ASTM:D-1557). Lateral Resistance: Footings that have been properly backfilled as recommended above will resist lateral movements by means of passive earth pressure and base friction. We recommend using an allowable passive earth pressure of250 psffor and an allowable base friction coefficient of0.35 for site soils. 4.3 Slab-On-Grade Floors In our opinion, soil-supported slab-on-grade floors can be used if the subgrades are properly prepared. We offer the following comments and recommendations concerning slab-on-grade floors. Floor Subbase: We recommend over-excavation of slab-on-grade floor subgrades to a minimum depth of 4 Y, feet. Slab-on-grade floors should eith.er be constructed on undisturbed native soils or on properly compacted structural fill as a floor subbase. If floor construction occurs during wet conditions, it is likely that a geotextile fabric, placed between the structural fill floor subbase and native soils, will be necessary. All subbase fill should be compacted to a density of at least 95 percent (based on ASTM:D-1557). Capillary Break and Vapor Barrier: To retard the upward wicking of moisture beneath the floor slab, we recommend that a capillary break be placed over the 12 inch subbase. Ideally, this capillary break would consist of a 4-inch-thick layer of pea gravel or other clean, uniform, well-rounded gravel, such as "Gravel Backfill for Drains" per WSDOT Standard Specification 9-03 .12( 4), but clean angular gravel can be used ifit adequately prevents capillary wicking. In addition, a layer of plastic sheeting (such as Crosstuff, Visqueen, or Moistop) should be placed over the capillary break to serve as a vapor barrier. During subsequent casting of the concrete slab, the contractor should exercise care to avoid puncturing this vapor barrier. 4.4 Asphalt Pavement Since asphalt pavements will be used for the new driveway and parking areas, we offer the following comments and recommendations for pavement design and construction. Sub grade Preparation: After removal of any surficial sod, topsoil, or organic-rich fill, all soil subgrades should be thoroughly compacted, then proof-rolled with a loaded dump truck or heavy compactor. Any localized zones of yielding subgrade disclosed during this proof-rolling operation should be over excavated to a maximum depth of 12 inches and replaced with a suitable structural fill material. All structural fill should be compacted according to our recommendations given in the Structural Fill section. Specifically, the upper 2 feet of soils underlying pavement section should be compacted to at least 95 percent (based on ASTM D-1557), and all soils below 2 feet should be compacted to at least 90 percent. Pavement Materials: For the base course, we recommend using imported crushed rock, such as "Crushed Surfacing Top Course" per WSDOT Standard Specification 9-03.9(3). If a subbase course is needed, we recommend using imported, clean, well-graded sand and gravel such as "Ballast" or "Gravel Borrow" per WSDOT Standard Specifications 9-03.9(1) and 9-03.14, respectively. 8 April 16, 2015 T15034 /Totenham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report Conventional Asphalt Sections: A conventional pavement section typically comprises an asphalt concrete pavement over a crushed rock base course. We recommend using the following conventional pavement sections: Pavement Course Asphalt Concrete Pavement Crushed Rock Base Granular Fill Subbase (if needed) Minimum Thickness Parking Areas 2inches 4inches 6inches Driveways 3inches 6inches 8inches Compaction and Observation: All subbase and base course material should be compacted to at least 95 percent of the Modified Proctor maximum dry density (ASTM D-1557), and all asphalt concrete should be compacted to at least 92 percent of the Rice value (ASTM D-2041). We recommend that an E3RA representative be retained to observe the compaction of each course before any overlying layer is placed. For the sub base and pavement course, compaction is best observed by means of frequent density testing. For the base course, methodology observations and hand-probing are more appropriate than density testing. Pavement Life and Maintenance: No asphalt pavement is maintenance-free. The above described pavement sections present our minimum recommendations for an average level of performance during a 20-year design life; therefore, an average level of maintenance will likely be required. Furthermore, a 20-year pavement life typically assumes that an overlay will be placed after about 10 years. Thicker asphalt and/or thicker base and subbase courses would offer better long-term performance, but would cost more initially; thinner courses would he more susceptihle to "alligator" cracking and other failure modes. As such, pavement design can be considered a compromise between a high initial cost and low maintenance costs versus a low initial cost and higher maintenance costs. 4.5 Structural Fill The term "structural fill" refers to any material placed under foundations, retaining walls, slab-on-grade floors, sidewalks, pavements, and other structures. Our comments, conclusions, and recommendations concerning structural fill are presented in the following paragraphs. Materials: Typical structural fill materials include clean sand, gravel, pea gravel, washed rock, crushed rock, well-graded mixtures of sand and gravel (commonly called "gravel borrow" or "pit-run"), and miscellaneous mixtures of silt, sand, and gravel. Recycled asphalt, concrete, and glass, which are derived from pulverizing the parent materials, are also potentially useful as structural fill in certain applications. Soils used for structural fill should not contain any organic matter or debris, nor any individual particles greater than about 6 inches in diameter. Fill Placement: Clean sand, gravel, crushed rock, soil mixtures, and recycled materials should be placed in horizontal lifts not exceeding 8 inches in loose thickness, and each lift should be thoroughly compacted with a mechanical compactor. Compaction Criteria: Using the Modified Proctor test (ASTM:D-1557) as a standard, we recommend that structural fill used for various onsite applications be compacted to the following minimum densities: 9 April 16, 2015 T15034 / Totenham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report Fill Application Footing subgrade and bearing pad Foundation backfill Slab-on-grade floor subgrade and subbase Asphalt pavement base Asphalt pavement subgrade (upper 2 feet) Asphalt pavement subgrade (below 2 feet) Minimum Compaction 95 percent 90 percent 95 percent 95 percent 95 percent 90 percent E3RA, Inc. Sub grade Observation and Compaction Testing: Regardless of material or location, all structural fill should be placed over finn, unyielding subgrades prepared in accordance with the Site Preparation section of this report. The condition of all subgrades should be observed by geotechnical personnel before filling or construction begins. Also, fill soil compaction should be verified by means of in-place density tests perfonned during fill placement so that adequacy of soil compaction efforts may be evaluated as earthwork progresses. Soil Moisture Considerations: The suitability of soils used for structural fill depends primarily on their grain-size distribution and moisture content when they are placed. As the "fines" content (that soil fraction passing the U.S. No. 200 Sieve) increases, soils become more sensitive to small changes in moisture content. Soils containing more than about 5 percent fines (by weight) cannot be consistently compacted to a finn, unyielding condition when the moisture content is more than 2 percentage points above or below optimum. For fill placement during wet-weather site work, we recommend using "clean" fill, which refers to soils that have a fines content of 5 percent or less (by weight) based on the soil fraction passing the U.S. No. 4 Sieve. 5.0 RECOMMENDED ADDITIONAL SERVICES Because the future perfonnance and integrity of the structural elements will depend largely on proper site preparation, drainage, fill placement, and construction procedures, monitoring and testing by experienced geotechnical personnel should be considered an integral part of the construction process. Consequently, we recommend that E3RA be retained to provide the following post-report services: Review all construction plans and specifications to verify that our design criteria presented in this report have been properly integrated into the design; Prepare a letter summarizing all review comments (ifrequired); Check all completed subgrades for footings and slab-on-grade floors before concrete is poured, in order to verify their bearing capacity; Prepare a post-construction letter summarizing all field observations, inspections, and test results (if required); and 10 April 16, 2015 T15034 / Toten ham, LLC -701 Sunset Blvd NE, Renton Geotechnical Engineering Report 6.0 CLOSURE The conclusions and recommendations presented in this report are based, in part, on the explorations that we observed for this study; therefore, if variations in the subgrade conditions are observed at a later time, we may need to modify this report to reflect those changes. Also, because the future perfonnance and integrity of the project elements depend largely on proper initial site preparation, drainage, and construction procedures, monitoring and testing by experienced geotechnical personnel should be considered an integral part of the construction process. E3RA is available to provide geotechnical monitoring of soils throughout construction. We appreciate the opportunity to be of service on this project. If you have any questions regarding this report or any aspects of the project, please feel free to contact our office. Sincerely, EJRA, Inc. Zach L. Logan Staff Geologist ZLL:JEB:jb James E. Brigham, P.E. Principal Engineer T ACOZ:\20 l 5 JOB FILES\Tl 5034 Totenham. LLC -701 NE Sunset Blvd, Rl'T1ton Gtotech\Tl 5034 701 Sunset Blvd NE Renton Geotcchnical Report.doc 11 z 0 " 1 112°15.000'W 122°15.000'W 122'14.000 W E3RA, Inc. P.O. Box 44840 Tacoma, WA 98448 112°13.000'W 122°13.000' W TO~' ~ pmted on 04/03/15 from 'Untnd.t?J' 112'11.000'W 122°12.000' W 122°11.000' W L .J 1w ba,1DfH1 ! W M I. M _rtl'liTIYi ~illll!tm:Oi':IIC:Wl'.ilo.u~l""~llllt:p1 1)20!0,000' W 122°10.000' IV 701 Sunset Blvd NE Renton, Washington Topographic and Location Map WGS84 l2l 009.D0J' W z 0 0 0 ,I . 11 WGS84 122°09.000' W FIGURE 1 T15034 \ ____ 232:__ \ \ \ \ \ co s:t 94' --- r---------~ ~, ..->:. -Y I I \ \ ------TP-2--/frf I I \ Ell \ \ ... · . --~ --; \ :,_ , I ... \• / I \ I L__ _ _ _1 122' 7 I I 40 N l ·r TEST PIT LOCATIONS TP-1 - 0 40 80 --------- SCALE IN FEET NOTE: BOUNDARY AND TOPOGRAPHY ARE BASED ON MAPPING PROVIDED TO E3RA AND OBSERVATIONS MADE IN THE FIELD. THE INFORMATION SHOWN DOES NOT CONSTITUTE A FIELD SURVEY BY E3RA. E3RA Inc. PO Box 44840 PROJECT: 701 Sunset Blvd NE Renton, Washington SHEET TITLE: Site and Exploration Plan Tacoma, WA 98448 DESIGNER: CRL JOB NO. T15034 253-537-9400 DRAWN BY: CRL SCALE As Shown 253-537-9401 fax CHECKED BY: JEB FIGURE:2 www.e3ra.com DATE: Apr. 16 , 20 15 FILE: T15034.dwg APPENDIX A SOIL CLASSIFICATION CHART AND KEY TO TEST DATA LOG OF TEST PITS ~ z z z ~ § MAJOR DIVISIONS CLEAN GRAVELS GRAVELS WITH UTILE OR NO FINES MORE THAN HALF ~ COARSE FRACTION <I) > ~ .~ IS LARGER THAN 0 -GRAVELS WITH <I) 0 NO 4SIEVE 0 0 OVER 15% FINES N UJ .. ;,; ' ., ,a c,: ~ 0 :i: UJ C CLEAN SANDS ~ <I) £ SANDS WITH UTILE c,: ., ~ OR NO FINES 0 0 (.) "' MORE THAN HALF COARSE FRACTION IS SMALLER THAN SANDS WITH N0.4SIEVE OVER 15% FINES SIL TS AND CLAYS Cl) -~ ~ -LIQUID LIMIT LESS THAN 50 oo </) al 0 .. 0 ,, GM o o GC 6 SW SP TYPICAL NAMES WELL GAADED GRAVELS. GRAVEL-SAND MIXTURES POORLY GRADED GRAVELS, GRAVEL-SAND MIXTURES SIL TY GRAVELS, POORLY GRADED GRAVEL-SAND-SILT MIXTURES CLAYEY GRAVELS, POORLY GRADED GRAVEL-SAND-CLAY MIXTURES WELL GRADED SANDS, GRAVELLY SANDS POORLY GRADED SANDS, GRAVELLY SANDS SIL TY SANDS, POOORL Y GRADED SAND-SILT MIXTURES SC ~ CLAYEY SANDS, POORLY GRADED SAND-CLAY MIXTURES f/, < ML INORGANIC SIL TS AND VERY FINE SANDS, ROCK FLOUR, SILTY OR CLAYEY FINE SANDS, OR CLAYEY SILTS WITH SLIGHT PlASTICITY INORGANIC CLAYS OF LOW TO MEDIUM PLASTICITY, I CL ~-~G_RA_v_E_LL_Y_c_LA_Y_s._s_A_N_D_Y_c_LA_Y_s_._s_1LTY_c_LA_Y_s_. ------1 ~ LEANCLAYS UJ V z,a~----------------~-~~~n----------------------1 ~ ;t ~ INORGANIC SIL TS, M1CACEOUS OR DIATOMACIOUS FINE OL ~ -ORGANIC CLAYS AND ORGANIC SILTY CLAYS OF LOW PLASTICITY (9 § SANDY OR SILTY SOILS, ELASTIC SILTS UJ £ ~ ~ SIL TS AND CLAYS ~ INORGANIC CLAYS OF HIGH PLASTICITY, FAT CLAYS LIQUID LIMIT GREATER THAN 50 HIGHLY ORGANIC SOILS ~ Modified California l3l Splrt Spoon • Pushed Shelby Tube Ill Auger Cuttings ~ Grab Sample • Sample Attempt with No Recovery CA Chemical Analysis CN Consolidation CP Compaction DS Direct Shear PM Permeability pp Pocket Penetrometer OH~ ORGANIC CLAYS OF MEDIUM TO HIGH PLASTICITY, ORGANIC SIL TS pt (..!. ~ PEP.TANDOTHERHIGHLYORGANICSOILS RV R-Value SA Sieve Analysis SW swell Test TC Cyclic Triaxial TX Unconsolidated Undrained Triaxial TV Torvane Shear UC Unconfined Compression (1.2) (Shear Strength, ksf) WA Wash Analysis (20) (with % Passing No. 200 Sieve) 'SJ. Water Level at Time of Drilling :? Water Level after Drilling(with date measured) SOIL CLASSIFICATION CHART AND KEY TO TEST DATA Figure A-1 I I ~--------------------------------------------~ E 3 RA, Inc. I E3RA, Inc. TEST PIT NUMBER TP-1 P.O. Box44840 PAGE 1 OF 1 Tacoma, WA 98448 Figure A-2 Telephone: 253-537-9400 Fax: 253-537-9401 CLIENT Totenham LLC PROJECT NAME 701 Sunset Blvd NE PROJECT NUMBER _I15034 ---PROJECT LOCATION Renton, Washington DATE STARTED 1/21/15 COMPLETED 1/21/15 GROUND ELEVATION TEST PIT SIZE -------- EXCAVATION CONTRACTOR GROUND WATER LEVELS: EXCAVATION METHOD AT TIME OF EXCAVATION --------- LOGGED BY DMW CHECKED BY AT END OF EXCAVATION ------- NOTES AFTER EXCAVATION -- w 0. 0 :,: i'=ffi ui I--w<D c..i :i\, 0."' -'::; 0. 0 MATERIAL DESCRIPTION w-en ii-' 0 0.::, ::i ::;z " ;ii 0.0 GP ---.::::7 \ .. c r\ 0 0.5 (GP) Gray gravel with sand and some silt (medium dense. moist) (Gravel Surfacing) - (SM) Bra,,,vn silty sand (medium dense, moist) (Fill) --- GB SM S-1 2.5 --- 3.5 ----I (SM) Dark brown silty sand with logs, WOOO'f debris and general refuse (loose, moist) (Fill) SM 4.5 -- ! 5.0 (SM) Light brown silty sand with some gravel (medium dense, moist) (Weathered Till) L - L GB SM S-2 L ' 7.5 75 No caving observed No groundwater seepage observed The depths on the test pit logs are based on an average cl measurements across the test pit and should be considered accurate to 0.5 foot. Bottom of test ptt at 7.5 feet. I E3RA, Inc. ' PO Box44840 ' 3 IE RA, Inc. ' Tacoma, WA 98448 Telephone: 253-537-9400 Fax 253-537-9401 CLIENT Totenham, LLC PROJECT NUMBER Tl5D34 __ _ DATESTARTED 1/21/15 EXCAVATION CONTRACTOR EXCAVATION METHOD COMPLETED 1/21115 LOGGED BY DMW CHECKED BY ------------ NOTES w a_ I 1: ffi <Ii ',l ~~ w"' u Ic, a_ 0 w---'::E <Ii i2 --' 0 a_:, ::i ::Ez '-" "' (/) TEST PIT NUMBER TP-2 PROJECT NAME _701 ~unset Bjv_g NE PROJECT LOCATION ~§_ntQ_n, Washington GROUND ELEVATION GROUND WATER LEVELS: TEST PIT SIZE AT TIME OF EXCAVATION _--_-_ _ _ _ AT END OF EXCAVATION --- AFTER EXCAVATION --- MATERIAL DESCRIPTION PAGE 1 OF 1 Figure A-3 0.0 ~1-'"-"-1----l---l----1-------------------------------------------l <!l (GP) Gray gravel with sand and some silt (medium dense, moist) (Gravel Surfacing) ~ ~ ~ w ~ ~ ~ E • u s w ~ z ~ w ~ ~ m ~ ~ ~ w w z R j ~ z w ~ - - J~§_ - L . L ?_'-Q_ g 7.5 w ~ 0 ~ ~ I m ~ ~ ~ w z w " ~ 0 > ~ GP GB S-1 SM SM GB S-2 SM --·--, C -~-' '-- ' ' - V ' --' 0.5 3.5 4.5 75 ---------------- (SM) Brown silty sand (medium dense, moist) (Fill) --------------------------s---------------------------- (SM) Dark brown silty sand with logs, woody debris and general refuse (loose. moist) (Fill) (SM) Light brown silty sand with some gravel (medium dense, moist) (Weathered Till) No caving observed No groundwater seepage observed The depths on the test pit logs are based on an average of measurements across the test pit and should be considered accurate to 0.5 foot. Bottom of test pit at 7.5 feet. UL-----------------------------------------------------' I E 3 RA, Inc. I E3RA, Inc. TEST PIT NUMBER TP-3 P.O. Box44840 PAGE 1 OF 1 Tacoma, WA 98448 Figure A-4 Telephone: 253-537-9400 Fax: 253-537-9401 CLIENT Totenham LLC PROJECT NAME 701 Sunset Blvd NE ------ PROJECT NUMBER T1503'!_ __ PROJECT LOCATION _R~Q_tQ!"l_,_Washington DATE ST ART ED 1121/15 COMPLETED _1/<_l/J§_ --GROUND ELEVATION TEST PIT SIZE EXCAVATION CONTRACTOR GROUND WATER LEVELS: EXCAVATION METHOD AT TIME OF EXCAVATION ------- LOGGED BY DMW CHECKED BY AT END OF EXCAVATION ---------·- NOTES AFTER EXCAVATION --------------- w "-() I i':ffi u; ,__ w OJ Li :i: c, "-"' -'::; "-0 MATERIAL DESCRIPTION w-"' ii-' 0 "-::, =i ::ez " ;Ji 0.0 -Sod and Topsoil f--· 0.5 - (SM) Bro.vn silty sand (medium dense, moist) (Fill) - - -SM 2.5 ~ -? 3.5 ----- (SM) Dark brown silty sand with logs, woody debris and general refuse (loose, moist) (Fill) f--SM f--4.5 5.0 {SM) Light brown silty sand with some gravel (medium dense, moist) (Weathered nll) r---- - -SM - f-- 7.5 7.5 No caving observed No groundwater seepage observed The depths oo the test pit logs are based on an average of measurements across the test pit and should be considered accurate to 0.5 foot. Bottom of test pit at 7.5 feet.