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• 2 <br /> H N Lehtinen <br /> StructuraU Civil Engineers <br /> 3216 Wetmore Ave. <br /> Everett, WA 98201 <br /> (206)252-2373 <br /> GENERAL SITE CONDITION <br /> The subject property, which consist approximately .95 acres is located in <br /> 1020 SE Everett Mall Way, Everett, Washington. <br /> Developed impervious area 0.70 Ac. (existing). <br /> Pervious area is 0.25 Ac. (existing) <br /> EXISTING CONDITION AND DRAINAGE <br /> Existing site has five (5) C.B.'s and one (1) controlled M.H. w/ <br /> oiUwater separator and drains directly into existing 12" storm drain on <br /> Everett Mall Way. <br /> PROPOSED CONDITION AN�J DRAINAGE SYSTEM <br /> Approximately 0.01 Ac. of impervious area is added or 0.71 Ac. total. <br /> The stuface water drains into existing M.H. w/ oil water separator and into <br /> new M.H. and wet vault and from there is pumped into new wet pond <br /> treahnent facility from there the stonn water gravit�� flows into new M.H. and <br /> to existing ]2" � storm drain on Everett Mall Way. <br />