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g. All paved outdoor storage areas shall be designed to minimize pollutant <br /> runoff. Bulk materials stored outdoors that may contribute to the pollution of <br /> stormwater runoff must be covered as deemed appropriate by the City <br /> Engineer/Chief Building Official. <br /> h. AU 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 use and maintenance: <br /> a. During installation, copper material shall be pre-patinated at the <br /> factory. If patination is done on-site; collect the rinse water in a tank <br /> and haul off-site for disposal. With prior authorization from Dublin San <br /> Ramon Services District (DSRSD), you may collect the rinse water in a <br /> tank and discharge to the sanitary sewer. Optionally, consider coating <br /> the copper materials with a clear coating that prevents further <br /> corrosion and stormwater pollution. The clear coating, if utilized, shall <br /> be reapplied (as recommended by the coating manufacturer) to <br /> maintain its efficacy. <br /> b. During maintenance, the following applies during washing and <br /> patination: <br /> i. Minimize washing of architectural copper as it damages the <br /> patina and any protective coating. <br /> ii. Block all storm drain inlets downstream of the wash. <br /> iii. collect in a tank and dispose off-site, or discharge the wash <br /> water to the sanitary sewer (with prior authorization from <br /> DSRSD). <br /> c. During re-patination, collect the rinse water in a tank'and dispose off- <br /> site or discharge to sewer (with prior authorization from DSRSD) . <br /> j. Roof drains shall drain away from the building foundation. Stormwater flow <br /> shall drain to a landscaped area or to an unpaved area wherever practicable <br /> as determined by the City Engineer/Chief Building Official. <br /> k. There shall be no direct roof leaders connected to the street gutter/parking lot <br /> or storm drain system, unless otherwise approved by the City engineer. <br /> B. 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 /> disturb one acre or more (including smaller sites that are part of a larger common plan <br /> of development). <br /> Information related to the Construction General Permit is on line at: <br /> • http://www.waterboards.ca.aov/water issues/programs/stormwater/construction.shtml <br /> PUD-98, CarMax Auto Superstores Page 33 <br />