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Western 9740 Evergreen Way * Everett, Washington 98204 <br />Engineers (425) 356-2700 <br />i& Inc. <br />SURVEYORS • PLANNERS • ENGINEERS <br />FAX (425) 356-2708 <br />• Inlet shut off valve is not necessary in this case. Project is small in <br />size and detained runoff entering into the sand filter is expected to <br />be only around 0.05 .cfs. for a 100 year storm event. If necessary, a <br />pump system can be used during maintenance to keep sediment <br />chamber relatively dry. <br />• Grated removable lid specified over entire width of sand filter <br />vault. <br />• Under drain cleanouts specified at both end of pipe. <br />• Cover over vault noted as removable. <br />• Structural calculations to be deferred until a later date. <br />Please let me know if you have any questions regarding this comment response letter or the revised <br />report and civil plans. <br />Sincerely, <br />O'PJP�ga"--W <br />Jesse Jarrell, P.E. <br />Project Manager <br />LAND USE CONSULTANTS *CIVIL ENGINEERS *LAND SURVEYORS *ENGINEERING CORPORATION <br />PIV <br />RAIDSERVER\2015\15-1415-A SILVER PLAZA\ENGINEERING\PUBLIC WORKS REVIEW RESPONSE LETTER _ r: <br />