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state or federal regulations that apply to the area'or body of water receiving the runoff. To~be <br />eligible for the impact reduction, the: owner must guarantee that the system will function as <br />intended. <br />6.1 Single Family Development (SFD) and .Duplex Development <br />Because stormwater SDCs for SFDs and duplexes are based on average amounts of <br />impervious surface, these buildings can qualify only for one of two impact reduction <br />rates: <br />a) 100% SDC reduction for complete elimination and management of runoff from the <br />site entering the public system or discharging into an area which ultimately enters <br />into: the public system; or <br />b) 50% reduction for partial reduction and management of runoff from the site entering <br />the public system regardless of the amount of reduction. <br />The SDC reduction will be granted after review and approval by the City Engineer of <br />:construction drawings, calculations, and other supporting documents prepared by a <br />licensed Civil Engineer demonstrating how the reduction in runoff will be achieved, <br />accompanied by a site plan showing the proposed mitigating facility and locations of <br />private and public stormwater facilities currently in use within.. and adjacent to the site. <br />6.2 Multi-family, Commercial, Industrial, and other Non-SFD Development <br />stormwater SDCs for these developments will be reduced proportional to the reduction in <br />total stormwater runoff entering the public stormwater system from the fully-developed <br />---- <br />site. (Total stormwater runoff includes both runoff from the site. in its natural condition <br />-- and any increase due to construction of impervious surfaces).. The SDC reduction-will be <br />granted after review and approval by the City Engineer of a report submitted by a <br />licensed Civil Engineer which includes a site plan showing the proposed mitigating facility <br />and locations of private and public stormwater facilities currently in use within and <br />adjacent to the site, existing natural drainage courses or other sources of water entering <br />the site, construction drawings, calculations, and other supporting documents <br />demonstrating how the reduction in runoff will be achieved and listing proposed <br />maintenance operations with a maintenance schedule. <br />City of Eugene SDC Methodology stormwater, .Page D-5 <br />