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RAMSEY WASHINGTON METRO WATERSHED <br />VOLUME REDUCTION <br />Stormwater retention shall be achieved on —site in the amount equivalent <br />to the runoff generated from a one inch rainfall over the impervious area. <br />Determine if the site has potential <br />contamination, uncontrollable physical <br />limitations, or and use limitations. <br />No <br />Meet the infiltration <br />standard <br />Yes <br />Achieve volume reduction on site to the <br />maximum extent practical through <br />alternative volume reduction methods. <br />If standard not met <br />Comply or partially comply with volume <br />reduction standard offsite or through <br />banked credits. <br />T <br />If standard not met <br />Pay into the Districts stormwater Impact fund <br />to cover cost of implementating elsewhere. <br />(Capped at $20,000 / impervious acre for <br />linear projects.) <br />WATER QUALITY <br />90% Total Suspended Solids (TSS) removal from 2.5" rainfall event. (If <br />infiltration standard is met you will have acheived this water quality <br />requirement) <br />Little Canada <br />3 <br />