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Z <br />'Z�. Site Assessment <br />The existing site is developed as a 12.500-square-foot bwld�ng accompanied by a 2,500-,quare-foot <br />garage and associatetl parking. Landscaped areas are small and there are siz ezisUng trees on the <br />east side of the srte. Existing slopes gradually slope down to lhe east and south, wRh approx�mately 9 <br />feet of rehet across the srte. The westem edge of the srte is bordered by steep slopes approximately <br />10-feet tall. Stormwater runoff is coi�ectetl by catch basins on srte and conveyed by storm dram pipe to <br />the 18�inch combined sewer runnmg paratlel ro Rainier Avenue. <br />�. ��t� �e�•elopment Plan <br />The proposed de�elopment has been designed to mmim�ze the creauon of stormwater runoff anC to <br />safely and efflc�enUy capture runoff that may be genereted as a resWt of development. This secUon <br />provides an overv�ew of the site developmen[ plan, includmg threshold discharge area determinat�or. <br />determmauon of flow control and water quahty requirements, and a discussion of OmSite Sto�mwater <br />Best �tanagement PracUces (BMPs) for this proJect. <br />THRESHOLD DISCHARGE AREA DETERMINATION <br />Stormwater runoR from this parcel is conveyed to the exlsting comb�ned sewer hne that runs parallel to <br />Rainier Avenue. The proposetl development will mclude one srorm drain connection to the ex�sting <br />sewer and reuse o( one ezis[ing connection to the same sewer, resu�ting m one threshold discharge <br />area compnsmg the enlire site. The total area for this threshold discharge area is 2.925 acres. <br />FLOW CONTROL REQUIREMENTS <br />Per (he reqwrements of the City of Everett Public 1Vorks Poticy No. 2d1, runoff fram the proposed <br />development must match the runoff of the ezisling s�te :onditions as described in SecUon 2.2.7 of Uu.� <br />Gry of Evere[t Stormwater Manual, 2010. io tlemonstrate compliance �vlth this reqwrement, the total <br />impervious area for both the ea�stir.g and developed ccndiUons is shown in Table 3-1. <br />Because the proposed development wdt reduce the total impernous cover of the srte, rt is ezpected <br />that Ihe stormwater runoff for peak flows from 50 F�rcent of the 2�year through the 50�year wdl <br />EHA Plvotal Polnt Apartments anC DVS <br />S�Ormwdter $ile Pl�n <br />