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the owner must guarantee that the system will function as 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 rates: <br />~)~ 100% SDC reduction for complete elimination and management of runoff from the site <br />entering the public system or discharging into an area which ultimately enters into the <br />public system; or <br />b) 50% reduction for partial reduction and management of runoff from the site entering the <br />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 licensed <br />Civil Engineer demonstrating how the reduction in runoff will be achieved, accompanied by <br />a site plan showing the proposed mitigating facility and_ locations of private and .public <br />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 site. <br />(Total stormwater runoff includes both runoff#rom the site in its natural condition and any <br />increase due to construction of impervious surfaces). The SDC reduction will be granted <br />after review and approval by the City Engineer of a report submitted by a .licensed Civil <br />Engineer which includes 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, existing <br />natural drainage courses or other sources of water entering the site, construction drawings, <br />calculations, and other supporting documents demonstrating how the reduction in runoff will <br />be achieved and listing proposed maintenance operations with a maintenance schedule. <br />~~ <br /> <br />City of Eugene SDC Methodology stormwater, :Page D-5 <br />