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H N Lehtinen <br />Eneineering <br />321G Wetmore Ave. <br />Everett, WA 98201 <br />(42S)252-2373 <br />EXISTING CONDITION: <br />The 5ite is located South of Everett at 18➢4 — t05�' SE. <br />The site is relatively flat. Th� subject is currently covered with grass with <br />several coniferous trees. ' <br />Existing residential house is located in the middle of property with a <br />driveway,Surface water currently sheet flows west to er.isting natural pond. <br />PROPOSED CONDITIUN5: <br />Existing build'rng is to be remodeled for office with sssociated parking. <br />The dd system consist of wet pond end water quality pond with a controlled <br />discharge to existing pond downstream. <br />The water quality pond will be sized based on volume of run off from 6- <br />month, 24-hr, design stornt, using develaped site conditions. <br />Wet pond will be sized b�sed on retaining/ detaining for the'/z the 2- years <br />storm at the 2-year developed rate and the 10 years and the 100 years storm. <br />