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<br />I <br />I <br />f <br />I <br />I <br />I <br />I <br />I ! <br /> / <br />I \ <br />, <br />\ <br />..) \ <br />1/ <br />I <br />I <br />I <br />I <br />I <br />I <br />" 10/89 <br />I <br /> <br />Par1<1ng lot <br /> <br />- <br /> <br />Storm <br />sewer <br /> <br />I InfiltratIon trench with surface Inlet I <br /> <br />Finer strip <br /> <br />Finer fabric <br />lines trench <br /> <br /> <br />Underground trench with OJUgrlt separator <br /> <br />Downspout <br />Overflow outlet <br /> <br />10' minimum <br /> <br />Paved surface <br /> <br />Overflow to storm sewer <br /> <br />Washed stone <br />or gravel <br /> <br />. <br /> <br />Washed stone <br />or gravel <br /> <br />6"-12" sand filter <br /> <br />6"-12" sand finer <br /> <br /> <br />I Cfstern type design <br /> <br />~ Screen to keep <br />leaves out <br /> <br /> <br />3-chamber oiV <br />grit separator <br /> <br />Washed stone <br />or gravel <br /> <br />~ .. ~ <br /> <br />'-' <br /> <br /> <br /> <br />6"-12" sand filter <br /> <br />Figure 4.4-1: Typical Infiltration trench Use <br /> <br />Observation port <br /> <br />Observatio <br />port <br /> <br />4.4.3 <br />