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SECTION IV: CONSTRUCTION STORMWATER POLLUTION <br /> PREVENTION PLAN <br /> This Stormwater Pollution Prevention Plan(SWPPP)has been prepared as part of <br /> the Construction stormwater permit requirements for the project Holbrook SFR in Everett, <br /> WA. It is located in Section 35, Township 29 North, and Range 4 East of the Willamette <br /> Meridian in the City of Everett, Washington. The site is currently vacant and exists as <br /> residential landscaping. The site contains one drainage basin that flows to the east. Per <br /> NRCS survey of Snohomish County, the project site contains Alderwood-Everett soils that <br /> have a hydrologic classification of Type"C" and Indianola type soils that have a <br /> classification of Type "A". The site area is 0.27 Acres. The proposal is to construct a <br /> single-family residence with a driveway and associated utilities. Access to the site will be <br /> from Darlington Ln. Minimum requirements 1-5 apply to the project because the project <br /> Lot's effective impervious area is 4,937 SF which is less than 5,000 SF. Onsite stormwater <br /> management(MR#5) for the proposed building will be provided by a 6' deep, 12' 0 <br /> infiltration drywell located in the northwestern portion of the site. A 6' deep, 3' 0 <br /> infiltration drywell will be provided in the northeastern corner of the site to provided <br /> infiltration for the building foundation drain. <br /> The purpose of this SWPPP is to describe the proposed construction activities and all <br /> temporary and permanent erosion and sediment control (TESC) measures, pollution <br /> prevention measures, inspection/monitoring activities, and recordkeeping that will be <br /> implemented during the proposed construction project. The objectives of the SWPPP are <br /> to: <br /> 1. Implement Best Management Practices (BMPs) to prevent erosion <br /> and sedimentation, and to identify, reduce, eliminate or prevent <br /> stormwater contamination and water pollution from construction <br /> activity. <br /> 2. Prevent violations of surface water quality, ground water quality, or <br /> sediment management standards. <br /> Insight Engineering Co. - Stormwater Site Plan 6/22/2022 <br /> - 13 - <br />