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Seattle,Washington <br /> www.pacland.com <br /> T 206.522.9510 <br /> TURNING VISIONS INTO REALITY <br /> The site isr <br /> const alned by the existing developed stormwater system of catch basins and <br /> underground detention pipes. Additionally there is limited area to propose aboveground <br /> treatrh nt facilities. Therefore, the Department of Ecology (DOE) General Use Level <br /> Designation (GULD) StormfilterTM system has been selected to provide Basic Treatment. <br /> A Summar of the stormwater treatment facility is provided in the table below. <br /> Table 7 — Stormwater Treatment Facility Information <br /> Treatment Locatio Cover Type Area Water Quality 15-min Number of Cartridges <br /> (AC) Flow Rate(cfs) (18") <br /> I East Parking (POC Pavement/ 1.55 0.2079 14 <br /> #1) Landscape <br /> West Parking (POC P. ement/ 1.37 0.1991 12 <br /> #2) Lari o scape <br /> Per discussions with the City • Everett, an equivalent catchment area can be used to <br /> provide treatment for the new p. lution generating impervious surfaces. The table below <br /> provides a breakdown of these ares. <br /> Table 8 •uivalent Treatment Areas <br /> Equivalent Area Treatment Areas Area <br /> Area to Treat (AC) (AC) <br /> ast Parking (POC#1)- 1.48 <br /> 'Pavement Area Only <br /> New PGIS 1.81 <br /> West Parking(POC #2) 1.26 <br /> - Pave "ent Area Only <br /> Total petal 2.74 <br /> - �1.� <br /> For additional information including basin maps, detai and WWHM results of the <br /> proposed treatment facility, see Appendix D — Treatmet Supplemental Information. <br /> Ce,0 ocecA <br /> I <br /> Everett Mall Plaza Parcel Ill Retail Expansion Stormwater Site Plan Page 23 <br />