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Trash dumpsters and recycling containers shall be in an enclosed and roofed area <br />to minimize water flowing in and from the area and to contain litter and trash to <br />minimize disbursement by the wind or runoff. These areas shall not drain to the <br />storm drain system, but to the sanitary sewer system and an area drain shall be <br />installed in the enclosure area with a structural control such as an oil /water <br />separator or sand filter. No other area shall drain into the trash enclosure; a ridge <br />or a berm shall be constructed to prevent such drainage if found necessary by the <br />City Engineer /Chief Building Official. A sign shall be posted prohibiting the <br />dumping of hazardous materials into the sanitary sewer. The project <br />applicant/developer shall notify the Dublin San Ramon Services District of the <br />sanitary sewer connection and provide written verification of such notification to <br />the City Engineer /Chief Building Official prior to the installation of the connection. <br />'g) All paved outdoor storage areas shall be designed to minimize pollutant runoff. <br />Bulk materials stored outdoors that may contribute to the pollution of storm water <br />runoff must be covered as deemed appropriate by the City Engineer /Chief <br />Building. <br />h) All metal roofs, gutters, and downspouts shall be finished with rust - inhibitive <br />finish /paint as determined by the Chief Building Official. <br />ii) All projects using architectural copper roofing, gutters, downspouts, etc., shall <br />utilize the following Best Management Practices for the use and maintenance: <br />During installation, copper material shall be pre - patinated at the factory, if <br />available. If patination is done on -site, collect the rinse water in a tank and <br />haul off -site for disposal. With prior authorization from Dublin San Ramon <br />Services District (DSRSD), the rinse water may be collected in a tank and <br />discharged to the sanitary sewer. Consider coating the copper materials <br />with a clear coating that prevents further corrosion and storm water <br />pollution. The clear coating, if utilized, shall be reapplied (as <br />recommended by the coating manufacturer) to maintain its efficacy. <br />During maintenance (e.g., washing or re- patination), the following applies: <br />Minimize washing of architectural copper as it damages the patina and <br />any protective coating. <br />Block storm drain inlets as needed to prevent runoff from entering <br />storm drains. <br />Collect the wash or rinse water in a tank and dispose off -site or (with <br />prior authorization from DSRSD), discharge the wash or rinse water to <br />the sanitary sewer. <br />Roof drains shall drain away from the building foundation. Ten percent of the <br />storm water flow shall drain to a landscaped area or to an unpaved area wherever <br />practicable as determined by the City Engineer /Chief Building Official. <br />Construction Requirements <br />The project shall comply with the "Construction General Permit' requirements of the <br />,NPDES Permit for construction activities (including other land disturbing activities) that <br />Page 23 <br />