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bld20151448_Campbell-Revision-1.docx City of Edmonds TH 121 5 AVENUE NORTH • EDMONDS, WA 98020 • (425) 771-0220 FAX(425) 771-0221 Website: www.ci.edmonds.wa.us PUBLIC WORKS DEPARTMENT Engineering Division Plan Review Corrections Plan Check : Date: # BLD20151448-Revision August 9, 2016 Project Name/Address: Campbell Garage 209 Caspers St Contact Person/Address/Fax: Rob Michel rwmichel@nwlink.com Reviewer: JoAnne ZulaufDivision:Engineering During review of the subject submittal, it was found that the following information, corrections, or clarifications would need to be addressed. All Handouts and Standard Details referred to in these comments can be accessed at our website: www.edmondswa.gov by choosing the Services and then Permits/Development. This submittal is incomplete. Storm drainage conveyance and sizing cannot be reviewed. A full engineering review shall be provided upon receipt of a complete submittal. 1. Stormwater Report and design over 5000sf is a Category 2 project. Please provide minimum requirements for a Small Site Category 2 project. Also see Stormwater Consultant Comments below. 2. There is currently a road extending to the east from the driveway circle. Please show on plans and include in stormwater mitigation. 3. There is currently a rockery along the east property line. Show on plan. 4. Show location of all utilities on plan, water, revise sewer location and dry utilities to confirm no conflict with location of storm system. 5. On the classification worksheet section, line 4 and line 7 do not match, please correct typo or revise calculations to show why these are different. 6. The Lot Line Adjustment was completed in 2014. Show property with final lot lines. In other words, remove the area at the southeast section of the property. It is not a part of the subject property. 7. Please correct the amended soils note errors. 8. Please review section 5.6.2 of the Stormwater Supplement and revise note #4. 9. Call out rim and invert elevations for the shop drainage to the catch basin. 10. Call out size of the catch basin and all invert elevations. 11. Please provide a list of each area of impervious surface and it’s square footage for clarity. 12. Is the existing driveway to be replaced? Include in list separate from patio. 13. How will the existing house roof runoff be collected and directed to the storm system? 14. Please number the two yard drains at the traffic circle. Show connection of the east yard drain to the system. Show what it is collecting. 15. Provide rim and invert elevations for all four yard drains. DATE FAXED/E-MAILED 7/2/2017 PAGE ___ OF __ 12 Stormwater Report and Plan: Consultant Stormwater Engineer review comments. 1.The plans and report for the subject property dated November 5, 2015 proposed a total of 4,114 square feet of new plus replaced impervious surface, qualifying the project as a Category 1 Small Site Project. The plans and report for the subject property dated June 29, 2016 propose a total of 6,507 of new impervious surface, as well as a replaced impervious patio (unknown area), qualifying the project as a Category 2 Small Site Project. Please update the report to address the minimum requirements associated with a Category 2 Small Site Project, and quantify each new and replaced impervious surface area. 2.The proposed infiltration facility is 28” deep. City of Edmonds Handout #E72D states that for Category 2 small sites, borings and test pits shall extend 5 feet below the bottom of the facility. The soils report (Drainfield Designs, 6/16/16) includes descriptions of 3 soil logs indicating that explorations extended 48-65 inches below grade. Please submit soil data for soil at depths extending at least 5 feet below the infiltration facility, within the proposed footprint of the infiltration facility. Please define any acronyms included in the descriptions. 3.The soils report (Drainfield Designs, 6/16/16) includes descriptions of 3 soil logs with brief statements of soil classification. Please follow one of the approved methods for determining design infiltration rates listed in City of Edmonds Handout #E72D Requirements for Establishing Design Infiltration Rates (USDA Textural Classification or Modified PIT). Please resubmit 3 copies of the revised plans/documents to a Development Services Coordinator. Please contact me at 425-771-0220 if you have specific questions regarding these plan corrections. DATE FAXED/E-MAILED 7/2/2017 PAGE ___ OF __ 22