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f) 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 /> i) 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 /> ii. 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 /> j) 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 />