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HomeMy WebLinkAboutEx_02_Environmental_Checklist ATTACHMENT 6: ENVIRONMENTAL CHECKLIST Exhibit 2 09/06/24AMorganroth RECEIVED 10/23/2024 AMorganroth PLANNING DIVISION Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 1 (WAC 197-11-960) SEPA1 Environmental Checklist Purpose of checklist 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 Please adjust the format of this template as needed. 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. 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, plus 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. 1 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/Checklist-guidance Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 2 (WAC 197-11-960) A. Background Find help answering background questions2 1. Name of proposed project, if applicable: Windsock General Aviation (GA) Apron and 243 Building GA Apron and Parking Lot Rehabilitation 2. Name of applicant: City of Renton - Renton Municipal Airport 3. Address and phone number of applicant and contact person: William Adams, PE City of Renton 616 W Perimeter Road, Unit A Renton, WA 98057 wadams@rentonwa.gov 425-430-7437 4. Date checklist prepared: July 18, 2024 5. Agency requesting checklist: City of Renton Department of Community and Economic Development 6. Proposed timing of schedule (including phasing, if applicable): Construction would start upon permit approval and is anticipated to begin late summer 2024. 7. Do you have any plans for future additions, expansion, or further activity related to or connected with this proposal? If yes, explain. There are no plans for future additions, expansion or further activity related to or connected with this proposal. This proposal only relates to the apron and parking lot rehabilitation for the Building 243 and Windsock aprons. 8. List any environmental information you know about that has been prepared, or will be prepared, directly related to this proposal. In addition to this SEPA Environmental Checklist, a Shoreline Exemption will be prepared for this proposal. 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 other applications are pending. If review under Section 106 of the National Historic Preservation Act is required, State Historic Preservation Office approval will be needed. 2 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-A-Background Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 3 (WAC 197-11-960) 10. List any government approvals or permits that will be needed for your proposal, if known. The following permits will be needed for this proposal: • City of Renton Land Use Permit Application • City of Renton Shoreline Exemption 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.) Renton Municipal Airport is proposing two concurrent projects within the Renton Municipal Airport: Building 243 Pavement Rehabilitation and Windsock Apron Pavement Rehabilitation. Building 243 Pavement Rehabilitation The Building 243 Pavement Rehabilitation project is located adjacent to the existing Renton Municipal Airport administrative building located at 243 W Perimeter Road, Renton, WA 98057. The existing pavement at the Building 243 parking lot (publicly accessible) and airport apron (not publicly accessible) is beyond its useful life, and a full depth repair of both pavement sections. As illustrated on the included site plan (Attachment X), the applicant is proposing to construct the following: • Full depth pavement repair • Parking lot reconfiguration • Aircraft apron tiedowns • Miscellaneous site elements pertinent to rehabilitation Windsock Apron Pavement Rehabilitation The Windsock Apron Pavement Rehabilitation project is located between Taxiway B (to the west) and Cedar River Commercial Waterway (to the east), and just south of Buildings 749A and 749B on the Renton Municipal Airport Property. As illustrated on the included site plan (Attachme the applicant is proposing to construct the following: • Full depth pavement repairs • Aircraft Apron Tiedowns • Miscellaneous site elements pertinent to rehabilitation 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 Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 4 (WAC 197-11-960) the agency, you are not required to duplicate maps or detailed plans submitted with any permit applications related to this checklist. The proposed apron and rehabilitation areas are located on Renton Municipal Airport property. The Renton Municipal Airport is located at 616 W Perimeter Road on City of Renton parcel 073059007. The Building 243 project area is located at the parking lot and aircraft apron area just north and east of 243 W. Perimeter Rd building. The Building 243 project is within Section 18, Township 23 North, Range 05 East. The Windsock project area is located at the aircraft apron area just south of the 749 E. Perimeter Rd buildings. The Windsock project area is within Section 7, Township 23 North, Range 05 East. B. Environmental Elements 1. Earth Find help answering earth questions3 a. General description of the site: Circle or highlight one: Flat, rolling, hilly, steep slopes, mountainous, other: The topography of the site is relatively flat with slopes ranging from 1% to 3%. The site is largely developed and is generally covered in asphalt or concrete with some landscaped areas. b. What is the steepest slope on the site (approximate percent slope)? 3% 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. The Natural Resources Conservation Service Web Soil Survey maps the soils at the Renton Municipal Airport as Urban Land with small percentages of Alderwood gravelly sandy loam, 15 to 30 percent slopes and Indianola loamy sand, 5 to 15 percent slopes along the western boundary of the airport property. A geotechnical investigation was conducted by HWA Geosciences Inc. in November 2023. Their geotechnical report describes the soils as “soft to very soft, fine-grained soils, including layers of peat and organic silt”. Soils near the Windsock Apron are described as “loose but mostly granular subsurface”. 3 https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist- guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-earth Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 5 (WAC 197-11-960) The airport property does not contain any agricultural land of long-term commercial significance and therefore no soils of this type will be removed. d. Are there surface indications or history of unstable soils in the immediate vicinity? If so, describe. The geotechnical explorations and testing near the Building 243 site indicated the presence of soft to very soft, fine grained soils, including layers of peat and organic silt, that will likely require stabilization before new pavement is constructed. Near the Windsock Apron, soils were loose and will require thorough compaction before pavement reconstruction. 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. The purpose of the project is to rehabilitate the existing pavement at both the 243 building and the Windsock Apron which is aged beyond its useful life. This project will reconstruct and regrade the aprons in these two locations, along with the parking lot located adjacent to the 243 Building. These aprons will be reconfigured to maximize aircraft parking areas at both locations. A total of 49,091 square feet of regrading and excavation is proposed at the 243 Building project area. A total of 66,725 square feet of regrading and excavation is proposed at the Windsock Apron. The project will result in 45.69 cubic yards of net fill. The project work will reconstruct the existing paved areas and there very little earth work happening overall. Fill material will consist of subbase course under the reconstructed pavement section to slightly raise grade, classified as P-154 by the Federal Aviation Administration (FAA). f. Could erosion occur because of clearing, construction, or use? If so, generally describe. The risk of erosion is minimal because all work is proposed in previously paved and disturbed areas. Temporary erosion control measures will be in place during construction to minimize impacts. g. About what percent of the site will be covered with impervious surfaces after project construction (for example, asphalt or buildings)? For the Windsock apron area, 100% of the site will be covered with impervious surface. For the 243 Building Apron, 93% of the site will be covered with impervious surface. h. Proposed measures to reduce or control erosion, or other impacts to the earth, if any. A Temporary Erosion and Sediment Control Plan (TESC) and Stormwater Pollution Prevention Plan (SWPPP) were developed for this site to provide temporary sediment control measures while construction is ongoing. Temporary erosion control measures will be in place during construction to minimize impacts. Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 6 (WAC 197-11-960) 2. Air Find help answering air questions4 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 from motorized construction equipment will occur during project construction. All construction equipment will meet current emission standards and will be maintained to function properly. There will be no additional emissions after the project is completed. b. Are there any off-site sources of emissions or odor that may affect your proposal? If so, generally describe. There are no known off-site sources of emissions or odor that may affect the proposal. c. Proposed measures to reduce or control emissions or other impacts to air, if any: All onsite equipment will be properly maintained and will meet current emission standards. 3. Water Find help answering water questions5 a. Surface: Find help answering surface water questions6 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. The Cedar River is adjacent to the eastern edge of the Renton Municipal Airport. The Cedar River flows into Lake Washington at the northeast corner of the airport. The City of Renton Sensitive Areas: Wetlands and Water Classifications Map also shows a non-fish bearing, seasonal stream that originates near 76th Avenue South and South 132nd Street, crosses Rainier Avenue and turns north to parallel W Perimeter Road. This stream outlets to Lake Washington. There are no other streams, lakes, ponds, or wetlands mapped on or in the immediate vicinity of the site. 4 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-Air 5 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-3-Water 6 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-3-Water/Environmental- elements-Surface-water Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 7 (WAC 197-11-960) 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. The project will not require any work over or in the Cedar River or the seasonal stream. The Windsock project area is adjacent (within 200 feet) of the Cedar River. The Cedar River is shown on the attached site plans (Attachment X). The seasonal stream is more than 200 feet from the Building 243 project area. 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. The project will not place or remove any fill or dredge material from any surface water or wetlands. 4. Will the proposal require surface water withdrawals or diversions? Give a general description, purpose, and approximate quantities if known. The proposal will not require surface water withdrawals or diversions. 5. Does the proposal lie within a 100-year floodplain? If so, note location on the site plan. The proposed projects are outside of the 100-year floodplain. 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. The proposal does not involve any discharges of waste materials to surface waters. b. Ground: Find help answering ground water questions7 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 a general description, purpose, and approximate quantities if known. The proposal will not withdraw groundwater for any purposes and the proposal will not result in any discharges to groundwater. 2. Describe waste material that will be discharged into the ground from septic tanks or other sources, if any (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. The proposal will not discharge any waste material into the ground from septic tanks or other sources. 7 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-3-Water/Environmental- elements-Groundwater Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 8 (WAC 197-11-960) c. Water Runoff (including stormwater): 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 from the windsock apron is collected in catch basins and either outfalls directly into the Cedar River or is detained in an onsite detention pond before it outfalls into the Cedar River. Runoff from the 243-building apron and parking lot is collected in catch basins and is routed to an offsite conveyance pipe which routes runoff north and eventually outfalls into Lake Washington. 2. Could waste materials enter ground or surface waters? If so, generally describe. No waste material will enter ground or surface waters as a result of this project. Construction will occur outside of the 100-year floodplain of the Cedar River. Machines will be maintained to prevent incidental discharges of waste. 3. Does the proposal alter or otherwise affect drainage patterns in the vicinity of the site? If so, describe. The proposal will not alter or otherwise affect drainage patterns in the vicinity of the site. No adjustments will be made to the drainage system. Stormwater structures will be protected in place and the site’s discharge location will remain as is. d. Proposed measures to reduce or control surface, ground, and runoff water, and drainage pattern impacts, if any: A Temporary Erosion and Sediment Control Plan (TESC) and Stormwater Pollution Prevention Plan (SWPPP) were developed for this site to provide temporary sediment control measures while construction is ongoing. Inlet protection shall be installed in all catch basins within the project vicinity. Triangular silt dikes and silt fences are proposed for the pavement areas and landscaped area respectively to ensure sediment laden runoff does not leave the site. 4. Plants Find help answering plants questions a. Check the types of vegetation found on the site: ☐ deciduous tree: alder, maple, aspen, other ☐ evergreen tree: fir, cedar, pine, other ☐ shrubs ☒ grass ☐ pasture Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 9 (WAC 197-11-960) ☐ crop or grain ☐ orchards, vineyards, or other permanent crops. ☐ wet soil plants: cattail, buttercup, bullrush, skunk cabbage, other ☐ water plants: water lily, eelgrass, milfoil, other ☐ other types of vegetation b. What kind and amount of vegetation will be removed or altered? Approximately 3,900 square feet of grass will be removed at the Building 243 project site. c. List threatened and endangered species known to be on or near the site. Washington Natural Heritage Program Data Explorer map tool shows there are no threatened or endangered plant species known to be on or near the site. The nearest mapped rare plant occurs approximately 2 miles west of the Renton Municipal Airport, near the Duwamish River in Tukwila. d. Proposed landscaping, use of native plants, or other measures to preserve or enhance vegetation on the site, if any There will be several landscape islands either reconstructed or added to the 243 building parking lot. These planter islands will likely include small trees and shrubs. e. List all noxious weeds and invasive species known to be on or near the site. Tansy ragwort ( Senecio jacobaea) is mapped by King County iMap on the east side of the Renton Municipal Airport property. Giant hogweed (Heracleum mantegazzianum) is mapped just west of the airport property at 515 Rainier Avenue N. 5. Animals Find help answering animal questions8 a. List any birds and other animals that 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: The Cedar River contains salmon and trout. b. List any threatened and endangered species known to be on or near the site. The Cedar River contains Chinook salmon (Oncorhynchus tshawytscha; federally Threatened), steelhead trout (Oncorhynchus mykiss; federally Endangered), and bull 8 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-5-Animals Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 10 (WAC 197-11-960) trout (Salvelins confluentus; federally Threatened). There are no other threatened or endangered species known to be on or near the site. c. Is the site part of a migration route? If so, explain. The site is within the Pacific flyway, a major migrating corridor for birds in North America west of the continental divide. However, the project site itself is not a known congregation point for migrating birds. Additionally, the site is adjacent to the Cedar River which is an important migration route for salmonid species. d. Proposed measures to preserve or enhance wildlife, if any. There are no measures proposed. e. List any invasive animal species known to be on or near the site. There are no invasive animal species known to be on or near the site. 6. Energy and natural resources Find help answering energy and natural resource questions9 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. The completed project will not have any energy needs. b. Would your project affect the potential use of solar energy by adjacent properties? If so, generally describe. The completed project will not affect the potential use of solar energy by adjacent properties because the proposed project involves pavement repair and apron rehabilitation. The proposal does not include any above ground structures that might shade adjacent properties and the completed project will be similar to the current conditions. 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 proposal does not include energy conservation features or measures to reduce or control energy impacts. The proposal includes pavement and apron rehabilitation which will not generate any new energy needs. 7. Environmental health Health Find help with answering environmental health questions10 9 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-6-Energy-natural-resou 10 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-7-Environmental-health Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 11 (WAC 197-11-960) a. Are there any environmental health hazards, including exposure to toxic chemicals, risk of fire and explosion, spill, or hazardous waste, that could occur because of this proposal? If so, describe. There are no known environmental health hazards that could occur because of this proposal. 1. Describe any known or possible contamination at the site from present or past uses. Washington Department of Ecology’s What’s in My Neighborhood map tool shows three cleanup sites on the Renton Municipal Airport property. The three sites are associated with aviation facilities on the airport property. One site has the status “cleanup complete”, one has the status “awaiting cleanup”, and one has the status “clean up started”. The cleanup sites are outside of the Building 243 and Windsock project areas. 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. There are no known existing hazardous chemicals or conditions that might affect project development or design. The National Pipeline Mapping System online map tool does not show any hazardous liquid or gas transmission pipelines located within the project area or in the vicinity. The nearest mapped pipeline to the airport is approximately 0.5 mile west of the airport property. 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. Spilling of fluids associated with construction equipment has the potential to occur. Potential spills will be minimized or avoided by implementing appropriate BMPs and by properly maintaining construction equipment. Fluids such as gasoline and oil will be stored away from the surface waters and in spill preventative containers. There will be no other storage, use or production of hazardous chemicals during project development and construction. The completed project will not use or require any toxic or hazardous chemicals. 4. Describe special emergency services that might be required. Emergency 911 response may be needed if there is a worker injury during construction. No other emergency services are anticipated. 5. Proposed measures to reduce or control environmental health hazards, if any. Appropriate BMPs will minimize risk of environmental health hazard exposure and mitigate environmental health hazards should exposure occur. b. Noise Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 12 (WAC 197-11-960) 1. What types of noise exist in the area which may affect your project (for example: traffic, equipment, operation, other)? Existing noise in the area consists of vehicular and aviation noises typical of a municipal airport. Existing noise will not affect the project. 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)? Short term noise associated with the project includes sound from construction equipment typical of paving projects. Long-term noise levels are not anticipated to increase as a result of this project. Construction noise will be temporary in nature and be restricted to daylight hours. 3. Proposed measures to reduce or control noise impacts, if any: Mufflers on motorized equipment will be maintained and construction will occur during daylight hours. There are no other proposed measures to control noise impacts. 8. Land and shoreline use Find help answering land and shoreline use questions11 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 current use of the site is as a municipal airport with supporting aviation facilities located on site. The site is zoned by City of Renton as Industrial Medium. The adjacent properties are within areas zoned by City of Renton as Urban Center – 2 and Commercial Arterial. Adjacent property uses west of the airport include: the Kiwanas Bicentennial Air Park (between West Perimeter Road and Rainier Avenue N); a retirement community, an apartment complex, and a mobile home park. A seaplane facility is to the north. A Boeing aviation manufacturing facility is east of Renton Municipal Airport and connected via a bridge over the Cedar River. The proposal will occur on Renton Municipal Airport property and will not affect current land uses on nearby or adjacent 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 because 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 nonforest use? The site is in a historic wetland and floodplain of the Cedar and Black Rivers that have historically been used as agricultural land, lumber mills and has been used as an airport since 1922. The site does not contain working farmlands or working forest lands. As 11 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-8-Land-shoreline-use Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 13 (WAC 197-11-960) there are no designated agricultural or forest land of long-term commercial significance on the airport property, none will be converted by the proposal. c. 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? There are no working farms or forest land operations in the vicinity of the Renton Airport. Therefore, the proposal will not affect or be affect by working farm or forest land operations. d. Describe any structures on the site. Both the Building 243 project site and the Windsock site contain an existing apron. The Building 243 site also contains a parking lot and is adjacent to a building used for administrative purposes. There are no other structures within the Windsock project site. However, both sites are within the Renton Municipal Airport which contains numerous buildings and structures used for aviation facilities and operations. e. Will any structures be demolished? If so, what? The proposal will not demolish any structures. f. What is the current zoning classification of the site? The Renton Municipal Airport site is in a Medium, Industrial (IM) zoning designation. g. What is the current comprehensive plan designation of the site? The Renton Municipal Airport is within an Employment Area Comprehensive Plan Land Use Designation. h. If applicable, what is the current shoreline master program designation of the site? The Renton Municipal Airport is within a Shoreline High Intensity Overlay District. i. Has any part of the site been classified as a critical area by the city or county? If so, specify. The City of Renton critical area maps show that the entire Renton Municipal Airport property is within a Zone 2 Aquifer Protection Area. The City of Renton Flood Hazard Map shows the entire Renton Municipal Airport property is mapped as within a FEMA Flood Zone X – Non Regulatory. Flood Zone X indicates an area with moderate to low risk for floods. There are no other critical areas mapped within the Renton Municipal Airport property. j. Approximately how many people would reside or work in the completed project? The proposal is improvements to existing an existing parking area and aprons. The completed project will not provide housing or additional employment opportunities. k. Approximately how many people would the completed project displace? The proposal is improvements to existing an existing parking area and aprons. No people would be displaced by the completed project. Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 14 (WAC 197-11-960) l. Proposed measures to avoid or reduce displacement impacts, if any. Not applicable. The project will not have any displacement impacts. m. Proposed measures to ensure the proposal is compatible with existing and projected land uses and plans, if any. The proposed apron and parking lot rehabilitation projects are consistent with existing land uses. The proposed project will not alter existing or projected land uses or plans. n. Proposed measures to reduce or control impacts to agricultural and forest lands of long-term commercial significance, if any: Not applicable. The project will not have any impacts to agricultural and forest lands of long-term commercial significance. 9. Housing Find help answering housing questions12 a. Approximately how many units would be provided, if any? Indicate whether high, middle, or low-income housing. The proposal is improvements to existing an existing parking area and aprons. No housing units would be provided. b. Approximately how many units, if any, would be eliminated? Indicate whether high, middle, or low-income housing. The proposal is improvements to existing an existing parking area and aprons. No housing units would be eliminated. c. Proposed measures to reduce or control housing impacts, if any: Not applicable. The project will not have any impacts on housing. 10. Aesthetics Find help answering aesthetics questions13 a. What is the tallest height of any proposed structure(s), not including antennas; what is the principal exterior building material(s) proposed? The project does not include any proposed structures. The completed parking area and apron improvements will be flush to the ground surface. b. What views in the immediate vicinity would be altered or obstructed? The completed parking area and apron improvements will not alter or obstruct any views in the immediate vicinity. c. Proposed measures to reduce or control aesthetic impacts, if any: 12 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-9-Housing 13 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-10-Aesthetics Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 15 (WAC 197-11-960) Not applicable. The completed parking area and apron improvements will not result in any aesthetic impacts. 11. Light and glare Find help answering light and glare questions14 a. What type of light or glare will the proposal produce? What time of day would it mainly occur? This project does not anticipate any replacement, installation, or temporary deactivation of any lights at the Renton Municipal Airport. b. Could light or glare from the finished project be a safety hazard or interfere with views? Not applicable. The completed project will not produce any new sources of light or glare. c. What existing off-site sources of light or glare may affect your proposal? Not applicable. The proposal will not be affected by off-site sources of light or glare. d. Proposed measures to reduce or control light and glare impacts, if any: Not applicable. There are no light or glare impacts anticipated. 12. Recreation Find help answering recreation questions a. What designated and informal recreational opportunities are in the immediate vicinity? The Renton Municipal Airport allows opportunities for recreational flying. b. Would the proposed project displace any existing recreational uses? If so, describe. The proposed project will not displace any existing recreational opportunities. c. Proposed measures to reduce or control impacts on recreation, including recreation opportunities to be provided by the project or applicant, if any: Not applicable. The proposed project will not have any impacts on recreation. 13. Historic and cultural preservation Find help answering historic and cultural preservation questions15 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? If so, specifically describe. 14 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-11-Light-glare 15 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-13-Historic-cultural-p Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 16 (WAC 197-11-960) The Washington State Department of Archaeology and Historic Preservation’s (DAHP) Information System for Architectural and Archaeological Resources (WISAARD) database has nine (9) recorded buildings, structures, or sites within 1,000 ft of the project area. Each of the WISAARD sites are outside of the project area and eight (8) of them are off the airport property. Seven (7) of the WISAARD sites have been determined not eligible for the National Register of Historic Places (NRHP), one (1) has had no determination of eligibility made, and one (1) has been determined eligible for the NRHP. The eligible property, the Jolly Boy Drive ID (344312), is located 111 Airport Way, approximately 250 ft south of the project area. b. Are there any landmarks, features, or other evidence of Indian or historic use or occupation? This may include human burials or old cemeteries. Are 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. There are no landmarks, features, areas of cultural importance, or other evidence of Indigenous or historic use or occupation on or near the project area. Five previous cultural resources surveys have been conducted in the vicinity of the project area, conducted by Celmer (1995) and Kent (2007), Butler (2014), Baldwin et al. (2016), and Baldwin et al. (2020). There is material evidence and historic artifacts known near project area 2B, Butler (2014) recorded a historic debris archaeological site at the location of the Renton airport runway blast wall. The site was determined ineligible for the NRHP and is not adversely affected by runway blast wall construction activities. 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. A review was conducted of existing cultural resources data for the project area (e.g., previous cultural resources survey reports, historic and ethnographic literature) to understand the nature and type of resources present near the project area. The review included information from the WISAARD maintained by the State of Washington DAHP and the NRHP and National Historic Landmark databases maintained by the National Park Service for recorded archaeological and historic resources. In addition, previous surveys and other literature relevant to the project area were reviewed. The WISAARD database is a repository used to identify previous cultural resource studies and previously recorded sites, historic buildings, structure, objects, or historic districts in or near the project area. Technical reports, memoranda, and letters generated by past cultural resources investigators that are held as digital files at DAHP through the WISAARD were assembled and reviewed. 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. It is recommended that no eligible properties will be affected by the Renton Aprons Project. If any previously unidentified cultural resources are discovered during project Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 17 (WAC 197-11-960) implementation all work in the area will stop, any features or items will not be touched, moved, or further disturbed once observed, and both the City of Renton and DAHP must be immediately notified. If items protected by the Native American Graves Protection and Repatriation Act are discovered during project implementation, all activities must cease in the area of discovery, and immediate notice made to the Federal Aviation Administration, the City of Renton, the DAHP, and the appropriate federally recognized Indian Tribes/Organizations. 14. Transportation Find help with answering transportation questions16 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. West Perimeter Road and East Perimeter Road serve the west and east sides of the airport. West Perimeter Road is accessed via Rainier Avenue which continues north, approximately 9 miles and connects to Interstate 90. East Perimeter Road is access from the south via Airport Way. Airport Way provides access to Interstate 405, approximately 1.5 miles east of the Renton Municipal Airport. The proposed project will not provide any additional access to the existing street systems. 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? Renton Municipal Airport is approximately 1 mile north of the Renton Transit Center which provides regional bus service operated by King County. c. 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). The proposal will not require any new or improvements to existing roads, streets, pedestrian, bicycle, or state transportation facilities. d. Will the project or proposal use (or occur in the immediate vicinity of) water, rail, or air transportation? If so, generally describe. The proposal is located within a regional airport and occurs in the immediate vicinity of air transportation. The proposal is not within the immediate vicinity of and will not use water or rail transportation. e. 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 nonpassenger vehicles). What data or transportation models were used to make these estimates? 16 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-B-Environmental-elements/Environmental-elements-14-Transportation Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 18 (WAC 197-11-960) The 243 building is the new airport administration building, supporting approximately four staff. It is not anticipated that this project will generate vehicle traffic in excess of 20 vehicles per hour at any time. No traffic impact analysis will be provided. f. 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. The proposal will not interfere with, affect, or be affected by the movement of agricultural and forest products on roads or streets in the area. The Renton Municipal Airport is in an urban area and there are no farms or working forest lands in the vicinity. Furthermore, the proposal is entirely located within Renton Municipal Airport property and will not have any impact any roads or streets in the surrounding area. g. Proposed measures to reduce or control transportation impacts, if any: Not applicable. The proposal is entirely located within Renton Municipal Airport property and will not have any transportation impacts. 15. Public services Find help answering public service questions17 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. The project will not result in an increased need for public services. b. Proposed measures to reduce or control direct impacts on public services, if any. Not applicable. The project will not have any direct impacts on public services. 16. Utilities Find help answering utilities questions18 a. Circle utilities currently available at the site: electricity, natural gas, water, refuse service, telephone, sanitary sewer, septic system, other: The Windsock and Building 243 apron sites themselves do not have any accessible utilities but the indicated utilities are available at the Renton Municipal Airport property. All existing utilities are underground. 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. A new gravity sewer will intercept the service from the 243 Building and re-route to the existing gravity sewer on W. Perimeter Road. The existing sewer lift station located between the 243 building and 250 building (hangar) will be decommissioned and filled with pea gravel, and the sewer lateral will be either abandoned in place or removed 17 https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist- guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-15-public-services 18 https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist- guidance/sepa-checklist-section-b-environmental-elements/environmental-elements-16-utilities Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 19 (WAC 197-11-960) completely. If existing lift station conflicts with new pavement section or other new construction, the lift station will be fully removed. C. Signature Find help about who should sign19 The above answers are true and complete to the best of my knowledge. I understand that the lead agency is relying on them to make its decision. X Type name of signee: Position and agency/organization: Date submitted: D. Supplemental sheet for nonproject actions Find help for the nonproject actions worksheet20 Do not use this section for project actions. Because these questions are very general, it may be helpful to read them in conjunction with the list of the elements of the environment. When answering these questions, be aware of the extent the proposal, or the types of activities likely to result from the proposal, would affect the item at a greater intensity or at a faster rate than if the proposal were not implemented. Respond briefly and in general terms. 1. How would the proposal be likely to increase discharge to water; emissions to air; production, storage, or release of toxic or hazardous substances; or production of noise? • Proposed measures to avoid or reduce such increases are: 2. How would the proposal be likely to affect plants, animals, fish, or marine life? 19 https://ecology.wa.gov/Regulations-Permits/SEPA/Environmental-review/SEPA-guidance/SEPA-checklist- guidance/SEPA-Checklist-Section-C-Signature 20 https://ecology.wa.gov/regulations-permits/sepa/environmental-review/sepa-guidance/sepa-checklist- guidance/sepa-checklist-section-d-non-project-actions Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7 SEPA Environmental checklist September 2023 Page 20 (WAC 197-11-960) • Proposed measures to protect or conserve plants, animals, fish, or marine life are: 3. How would the proposal be likely to deplete energy or natural resources? • Proposed measures to protect or conserve energy and natural resources are: 4. How would the proposal be likely to use or affect environmentally sensitive areas or areas designated (or eligible or under study) for governmental protection, such as parks, wilderness, wild and scenic rivers, threatened or endangered species habitat, historic or cultural sites, wetlands, floodplains, or prime farmlands? • Proposed measures to protect such resources or to avoid or reduce impacts are: 5. How would the proposal be likely to affect land and shoreline use, including whether it would allow or encourage land or shoreline uses incompatible with existing plans? • Proposed measures to avoid or reduce shoreline and land use impacts are: 6. How would the proposal be likely to increase demands on transportation or public services and utilities? • Proposed measures to reduce or respond to such demand(s) are: 7. Identify, if possible, whether the proposal may conflict with local, state, or federal laws or requirements for the protection of the environment. Docusign Envelope ID: D31D61AF-180E-439C-B708-0C917E2644A7