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• <br /> In addition to the maintenance checklists provided in the Stormwater Management <br /> Manual,the three checklists found at the end of Section 4 of the DCSS must also be <br /> included as applicable. <br /> CIVIL PLANS <br /> The outlet pipe from the wetland to the west of this project crosses the northeast <br /> corner of proposed lot 1. A minimum of 5' from the edge of this pipe shall be dedicated <br /> in a private drainage easement granted to the adjacent property owner at 10518 13th <br /> Ave W, where the pipe originates. <br /> The existing pipe information for the 18" storm drain along the frontage of this project <br /> indicates the pipe is corrugated metal on all the plan views. However,the detail of CB <br /> #2 on the profile view indicates the pipe is CPEP. All references to the pipe must be <br /> consistent. <br /> If any portion of the drainage system for the two lots is shared, such as the pipe <br /> connecting the two proposed perforated stub-outs, a private drainage easement must <br /> be provided to the upstream property owner for the portion of the system located on <br /> the adjacent, downstream property. If feasible,the systems must be kept separate in <br /> order to avoid conflicts between neighbors in the future... Therefore, any drainage <br /> system on lot 2 should be connected to the catch basin in the ROW in front of lot 2. <br /> The following performance standard for BMP T5.13 shall be included on the storm <br /> drainage plans: <br /> BMP T5.13: Post-Construction Soil Quality and Depth <br /> Soil Quality: All areas subject to clearing and grading that have not been covered by <br /> hard surface, incorporated into a drainage facility, or engineered as structural fill or <br /> slope shall demonstrate the following at project completion: <br /> 1) A topsoil layer with a minimum organic matter content of 10% dry weight in <br /> planting beds and 5% organic content in turf areas, with a pH from 6.0—8.0 or <br /> matching the pH of the undisturbed native soil. <br /> 2) The topsoil layer shall have a minimum depth of eight inches except where tree <br /> roots limit the depth of incorporation of amendments needed to meet the <br /> criteria. <br /> 3) Subsoils below the topsoil layer shall be scarified at least four inches with some <br /> incorporation of the upper material to avoid stratified layers, where feasible. <br /> 4) Planting beds shall be mulched with 2 inches of organic material. <br /> s:\jzimmerm\word\pr_8417 Evg Way <br />