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3 . Proposed Conditions <br /> The proposed conditions can be broken down into three cat;gories. <br /> 1. East drainage basin. <br /> � 2. West drainage basin. <br /> 3. Building roof and footing drains. <br /> The runoff generated by the eastem portion of the site will be collected, trcated and discharged into <br /> the Merrill Creek Pazkway storm drainage system. The stormwater will be collected and conveyed <br /> to a conuol structure. The control structure will regulate the 6-month, 24-hour flows through a <br /> wetvault and compost stormwater filter and the higher flows will bypass the water quality system <br /> and be discharged directly into the stormwater system. <br /> The runoff generated by the westem nortion of the site will be collected, treated and dispersed by <br /> a level spreader into the native growth protection azea. This stormwater will be collected and <br /> conve,yed to a control structure.The contral structure will regula.:e the 2-yenr,24-liour flows through <br /> an oiUwater separator and a vegetative swale and dischazge into a level spreader.The higher flows <br /> will bypass the oiUwater separator and vegetative swnle and be discharged dimctly into the level <br /> • spreader. <br /> The runoff generated from the building roof top and the building footing drains does not need to be <br /> trcated by the site's water quality system. The stormwater flows will be divided, with a smaller <br /> portion going to the weatern basin and a lazger portion going into the eastem basin. The portion <br /> going to the western basin will be discharged directly into the level spreader.The portion going to <br /> the eastem basin will be discharged directly into the Merrill Creek Pazkway stormwater system. <br /> A CN of 98 will be used to represent the impervious area on the site. <br /> Smrm Drainage Repor� I:IPROJEC71168l80011FIYDIREPORT.WPD <br /> W&H Pacific, /nc. Julv 3, l°96/Page 3 <br />