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HomeMy WebLinkAboutD_ERC_Determination_Boeing_Mitigation_Hangar_180618.pdf DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT SIGNATURES: Gregg Zimmerman, Administrator Public Works Department Date Rick M. Marshall, Administrator Renton Regional Fire Authority Date Kelly Beymer, Administrator Community Services Department Date C.E. Vincent, Administrator Department of Community & Economic Development Date ENVIRONMENTAL (SEPA) DETERMINATION OF NON-SIGNIFICANCE - MITIGATED (DNS-M) PROJECT NUMBER: LUA18-000293, ECF APPLICANT: Mark Clement, PO Box 3707, MC 96-01, Seattle, WA 98124 PROJECT NAME: Boeing Mitigation Hangar PROJECT DESCRIPTION: The applicant is requesting Environmental (SEPA) Review for the construction of a 58,474 square foot hangar at the Boeing plant site. The subject property (APN 0723059001) is to the east of the Ce dar River along the southern shore of Lake Washington. The site, home to the Boeing 737 plant and associated support buildings, is located in the Urban Center (UC) zone and has a Commercial Mixed Use designation on the Comprehensive Land Use Map. The proposed hangar would be used as an extension of the final assembly building (4-81-82). The hangar would have space for two un-fueled 737 aircrafts to undergo troubleshooting of problems that may arise during final inspections. The proposed location of the hangar is near the northwest corner of the assembly building approximately 215 feet from the Lake Washington Ordinary High Water Mark (OHWM) and is outside of the Shoreline Jurisdiction of Lake Washington, Reach I, designated as Shoreline High Intensity. A High Seismic Hazard is mapped on the project site. No change in access to the site is proposed, but internal roads and parking may be affected. The applicant has not proposed any impervious surface increase, tree removal, or vegetation removal as a part of the project. The applicant submitted a Drainage Report, Geotechnical Report, and Parking/Traffic Analysis with the application. PROJECT LOCATION: 737 Logan Ave N, Renton, WA 98054 LEAD AGENCY: City of Renton Environmental Review Committee Department of Community & Economic Development The City of Renton Environmental Review Committee has determined that it does not have a probable significant adverse impact on the environment. An Environmental Impact Statement (EIS) is not required under RCW 43.21C.030(2)(c). Conditions were imposed as mitigation measures by the Environmental Review Committee under their authority of Section 4-9-070D Renton Municipal Code. These conditions are necessary to mitigate environmental impacts identified during the environmental review process. Because other agencies of jurisdiction may be involved, the lead agency will not act on this proposal for fourteen (14) days. Appeals of the environmental determination must be filed in writing on or before 5:00 p.m. on June 22, 2018. Appeals must be filed in writing together with the required fee with: Hearing Examiner, City of Renton, 1055 South Grady Way, Renton, WA 98057. Appeals to the Examiner are governed by RMC 4-8-110 and more information may be obtained from the Renton City Clerk’s Office, (425) 430-6510. PUBLICATION DATE: June 22, 2018 DATE OF DECISION: June 18, 2018 DocuSign Envelope ID: 4576C8FD-5022-4B7E-8EBD-9B0DB50F2CBE 6/18/2018 | 4:52 PM PDT 6/18/2018 | 3:09 PM PDT 6/18/2018 | 3:23 PM PDT 6/18/2018 | 3:13 PM PDT DETERMINATION OF NON-SIGNIFICANCE – MITIGATED (DNS-M) MITIGATION MEASURES AND ADVISORY NOTES PROJECT NUMBER: LUA18-000293, ECF APPLICANT: Mark Clement, PO Box 3707, MC 96-01, Seattle, WA 98124 PROJECT NAME: Boeing Mitigation Hangar PROJECT DESCRIPTION: The applicant is requesting Environmental (SEPA) Review for the construction of a 58,474 square foot hangar at the Boeing plant site. The subject property (APN 0723059001) is to the east of the Cedar River along the southern shore of Lake Washington. The site, home to the Boeing 737 plant and associated support buildings, is located in the Urban Center (UC) zone and has a Commercial Mixed Use designation on the Comprehensive Land Use Map . The proposed hangar would be used as an extension of the final assembly building (4-81-82). The hangar would have space for two un-fueled 737 aircrafts to undergo troubleshooting of problems that may arise during final inspections. The proposed location of the hangar is near the northwest corner of the assembly building approximately 215 feet from the Lake Washington Ordinary High Water Mark (OHWM) and is outside of the Shoreline Jurisdiction of Lake Washington, Reach I, designated as Shoreline High Intensity. A High Seismic Hazard is mapped on the project site. No change in access to the site is pro posed, but internal roads and parking may be affected. The applicant has not proposed any impervious surface increase, tree removal, or vegetation removal as a part of the project. The applicant submitted a Drainage Report, Geotechnical Report, and Parking/Traffic Analysis with the application. PROJECT LOCATION: 737 Logan Ave N, Renton, WA 98054 LEAD AGENCY: The City of Renton Department of Community & Economic Development Planning Division MITIGATION MEASURES: 1. The applicant shall comply with the recommendations of the geotechnical report prepared by S&EE, dated April 23, 2018, or an updated report submitted at a later date. 2. The applicant shall submit documentation to the Current Planning Project Manager showing no net increase in artificial light levels at the OHWM as a result of the project. The documentation shall be submitted prior to Civil Construction Permit application submittal. ADIVISORY NOTES: The following notes are supplemental information provided in conjunction with the administrative land use action. Because these notes are provided as information only, they are not subject to the appeal process for the land use actions. DEPARTMENT OF COMMUNITY AND ECONOMIC DEVELOPMENT Page 1 of 5 LUA18-000293 ADVISORY NOTES TO APPLICANT The following notes are supplemental information provided in conjunction with the administrative land use action. Because these notes are provided as information only, they are not subject to the appeal process for the land use action. Planning: (Contact: Alex Morganroth, 425-430-7219, amorganroth@rentonwa.gov) 1. RMC section 4-4-030.C.2 limits haul hours between 8:30 am to 3:30 pm, Monday through Friday unless otherwise approved by the Development Services Division. 2. Commercial, multi-family, new single family and other nonresidential construction activities shall be restricted to the hours between seven o’clock (7:00) a.m. and eight o’clock (8:00) p.m., Monday through Friday. Work on Saturdays shall be restricted to the hours between nine o’clock (9:00) a.m. and eight o’clock (8:00) p.m. No work shall be permitted on Sundays. 3. Within thirty (30) days of completion of grading work, the applicant shall hydroseed or plant an appropriate ground cover over any portion of the site that is graded or cleared of vegetation and where no further construction work will occur within ninety (90) days. Alternative measures such as mulch, sodding, or plastic covering as specified in the current King County Surface Water Management Design Manual as adopted by the City of Renton may be proposed bet ween the dates of November 1st and March 31st of each year. The Development Services Division’s approval of this work is required prior to final inspection and approval of the permit. 4. A National Permit Discharge Elimination System (NPDES) permit is required when more than one acre is being cleared. 5. The applicant may not fill, excavate, stack or store any equipment, dispose of any materials, supplies or fluids, operate any equipment, install impervious surfaces, or compact the earth in any way within the area defined by the drip line of any tree to be retained. 6. This permit is shall comply with the Bald and Golden Eagle Protection Act. The permitted is responsible for adhering to the U.S. Fish and Wildlife Service National Bald Eagle Management Guidelines (2007) and /or your U.S. Fish and Wildlife Service permit. Development Engineering: (Contact: Ann Fowler, 425-430-7382 , afowler@rentonwa.gov) 1. See Attached Development Engineering Memo dated May 22, 2018 Fire Authority: (Contact: Corey Thomas, 425-430-7024, cthomas@rentonrfa.org) 1. The required fire flow does not change with this new addition. Existing private fire hydrant looped water main system provides adequate fire flow and shall be relocated as necessary to accommodate footprint of proposed building. Fire protection water mains are not allowed by code to be run underneath a building. A minimum of one hydrant is required within 150-feet of the structure and all other additional hydrants are required within 300-feet of the structure. Maximum hydrant spacing is 300 feet on center around the building. One hydrant shall be within 50-feet of the fire department sprinkler connection. A looped water main is required to be installed around the building. ADVISORY NOTES TO APPLICANT Page 2 of 5 LUA18-000293 2. Approved fire sprinkler and fire alarm systems are required throughout the building. Separate plans and permits required by the fire department. Direct outside access is required to the fire sprinkler riser room. Fully addressable and full detection is required for the fire alarm system. 3. Fire department apparatus access roadways are required within 150 -feet of all points on the building. Fire lane signage required for the on site roadway. Required turning radius are 25 -feet inside and 45- feet outside. Roadways shall be a minimum of 20-feet wide. Roadways shall support a minimum of a 30-ton vehicle and 75-psi point loading. 4. Applicant shall provide a completed Hazardous Material Inventory Statement prior to building permit issuance. Use of City of Renton form or approved equivalent is required. ADVISORY NOTES TO APPLICANT Page 3 of 5 LUA18-000293 DEPARTMENT OF COMMUNITY & ECONOMIC DEVELOPMENT M E M O R A N D U M DATE: May 22, 2018 TO: Alex Morganroth, Planner FROM: Ann Fowler, Civil Plan Reviewer SUBJECT: Utility and Transportation Comments for Boeing New 4-87 Mitigation Hangar 737 Logan Ave N LUA 18-000293 I have reviewed the application for the Boeing New 4-87 Mitigation Hangar at 737 Logan Ave N (APN(‘s) 0723059001) and have the following comments: EXISTING CONDITIONS The project site is located at the northern extent of the existing Boeing Reproduction Plant, directly adjacent to the northwest corner of Building 4-81 and just south of Apron R. Aircraft staging stalls are located on the western end of the project. A two-way vehicular drive aisle and pedestrian path separates the area uses and includes a dedicated fire access lane. There is an existing employee parking area located at the southern end of the project site. Stormwater r unoff from the existing site is collected in a series of private catch basins and conveyance pipes and routed through a combined oil/water separator and water quality vault prior to discharge into the existing outfalls within Lake Washington. The existing vault is located within the proposed building footprint. CODE REQUIREMENTS WATER 1. The applicant has not proposed the addition, removal or replacement of any public water utility lines or appurtenances. However, there are numerous utilities owned by Boeing, including water lines for domestic and fire protection within the proposed redevelopment area. The Civil plans should clearly identify the impacted private water lines and hydrants and their proposed relocations. 2. Relocation of the fire line will require separate fire permits. SEWER 1. The applicant has not proposed the addition, removal or replacement of any public sewer utility lines or appurtenances. Civil plans and permit will be required if the project results in the installation of a new, replaced, or relocated wastewater main. If floor drains are required by the building department, drains are required to be connected to the sanitary sewer system. Flows shall be directed through the floor drains that are installed in accordance with the Uniform Plumbing Code to an interior or exterior oil/water separator. SURFACE WATER ADVISORY NOTES TO APPLICANT Page 4 of 5 LUA18-000293 1. A geotechnical report, dated April 23, 2018, completed by Soil & Environmental Engineers, Inc. (S&EE) for the site has been provided. The submitted report describes the site is a Low Erosion Hazard area. Erosion control measures will need to be in place prior to starting grading activities on the site. Geotechnical recommendations presented need to be address within the project plans. 2. A Preliminary Drainage Plan and Technical Information Report (TIR), dated April 26, 2018, was submitted by BergerABAM with the Land Use Application. Based on the City of Renton’s flow control map, the site falls within the Peak Rate Flow Control Standard area matching Existing Site Conditions and is within the Lake Washington and Cedar River Drainage Basin. The development is subject to Full Drainage Review in accordance with the 2017 Renton Surface Water Design Manual (RSWDM). All nine core requirements and the six special requirements have been discussed in the Technical Information Report. 3. Direct Discharge Exception - The project site is located within the Lake Washington and Cedar River drainage basin and the flowpath from the project site discharge point is less than a half mile to the 100-year floodplain of Lake Washington and qualifies for the direct discharge exemption in accordance with Section 1.2.3.1 of the 2017 RSWDM and must adhere to all requirements thereof. 4. The project is classified as a redevelopment project in accordance with the definition of redevelopment project provided in the RSWDM. As a redevelopment project, the project is exempt from Core Requirement #8 – Water Quality as it meets the exemption criteria outlined in Section 1.2.8 of the RSWDM - #3 Cost Exemption for Parcel Redevelopment Projects. However, the applicant has elected to provide enhanced water quality treatment prior to discharge in order to provide a benefit to Lake Washington and its aquatic habitat. Project water quality treatment will consist of conveyance to oil/water separator vaults, which will direct surface water to several Linear Modular Wetland systems prior to discharge to the outfalls in Lake Washington. 5. The proposed oil/water separator and water quality systems shall be designed in accordance with the RSWDM that is current at the time of civil construction permit application. Separate structural plans will be required to be submitted for review and approval under a separate building permit for the detention and/or water quality vault. Special inspection from the building department is required. 6. All conveyance systems and outfalls impacted and/or created by the redevelopment project shall be analyzed in accordance with the RSWDM. 7. Appropriate on-site BMPs will be required to help mitigate the new runoff created by this development. The final drainage plan and drainage report, addressing the implementation of on-site BMPs must be submitted with the civil construction permit application. The applicant will need to re-evaluate the feasibility of utilizing basic dispersion for the target impervious surface areas that may be able to disperse into any added or existing landscaping areas. 8. A Construction Stormwater General Permit from Department of Ecology will be required if grading and clearing of the site exceeds one acre. A Stormwater Pollution Prevention Plan (SWPPP) is required for this site. 9. Surface water system development fee is $0.687 per square foot of new impervious surface, but not less than $1,718.00. This is payable prior to issuance of the construction permit. 10. The applicant shall provide a resolution to the ponding of water on top of the pavement to the west of the project site as a maintenance activity prior to or as part of the civil construction permit approval for the Boeing Mitigation Hangar Project. TRANSPORTATION 1. The proposed redevelopment does not front any public right-of-way. 2. On-site improvements include restriping of the parking lot area to provide accessible parking stalls and restriping of the existing pavement surfaces to redirect traffic flow, including a designated fire lane. All fire lanes shall be designed and constructed per Renton Fire Authority standards with all required signage installed. 3. If removal and/or grading of the parking lot or drive aisles is required or proposed, the replaced impervious surfaces may trigger water quality mitigation and will need to be reviewed and addressed as part of the final drainage report. GENERAL COMMENTS 1. Maximum exposed retaining wall height is outlined in RMC 4-4-040 – Fences, Hedges and Retaining Walls. ADVISORY NOTES TO APPLICANT Page 5 of 5 LUA18-000293 2. Adequate separation between utilities as well as other features shall be provided in accordance with code requirements. a. 7-ft minimum horizontal and 1-ft vertical separation between storm and other utilities is required with the exception of water lines which require 10-ft horizontal and 1.5-ft vertical. b. The stormwater line should be minimum 5 feet away from any other structure or wall or building. c. Trench of any utility should not be in the zone of influence of the retaining wall or of the building. 3. All civil construction permits for utility and street improvements will require separate plan submittals. All utility plans shall confirm to the Renton Drafting Standards. A licensed Civil Engineer shall prepare the civil plans. Please visit the Development Engineering Forms page for the most up-to-date plan submittal requirements: http://rentonwa.gov/business/default.aspx?id=42473 4. A landscaping plan shall be included with the civil plan submittal. Each plan shall be on separate sheets. 5. Fees quoted in this document reflect the fees applicable in the year 2017 only and will be assessed based on the fee that is current at the time of the permit application or issuance, as applicable to the permit type. Please visit www.rentonwa.gov for the current development fee schedule. * An additional 5% technology fee will be added to each fee marked with an asterisk (*). 6. A demo permit is required for the demolition of the existing vault. The demo permit shall be acquired through the building department.