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I` <br />'t <br /> 9. Control Pollutants <br /> Design, install, implement and maintain effective pollution prevention measures to <br /> minimize the discharge of pollutants.The Permittee must: <br /> a. Handle and dispose of all pollutants, including waste materials and demolition <br /> debris that occur on site in a manner that does not cause contamination of <br /> stormwater. <br /> b. Provide cover,containment, and protection from vandalism for all chemicals, liquid <br /> i products, petroleum products, and other materials that have the potential to pose a <br /> threat to human health or the environment. Minimize storage of hazardous <br /> materials on-site. Safety Data Sheets (SDS)should be supplied for all materials <br /> stored. Chemicals should be kept in their original labeled containers. On-site fueling <br /> tanks must include secondary containment. Secondary containment means placing <br /> tanks or containers within an impervious structure capable of containing 110%of <br /> j the volume of the largest tank within the containment structure. Double-walled <br /> tanks do not require additional secondary containment. <br /> E c. Conduct maintenance,fueling, and repair of heavy equipment and vehicles using <br /> spill prevention and control measures. Clean contaminated surfaces immediately <br /> following any spill incident. <br /> E <br /> d. Discharge wheel wash or tire bath wastewater to a separate on-site treatment <br /> system that prevents discharge to surface water,such as closed-loop recirculation <br /> or upland land application, or to the sanitary sewer with local sewer district <br /> f approval. <br /> e. Apply fertilizers and pesticides in a manner and at application rates that will not <br /> result in loss of chemical to stormwater runoff. Follow manufacturers' label <br /> requirements for application rates and procedures. <br /> E <br /> f. Use BMPs to prevent contamination of stormwater runoff by pH-modifying sources. <br /> The sources for this contamination include, but are not limited to: bulk cement, <br /> cement kiln dust, fly ash, new concrete washing and curing waters, recycled <br /> concrete stockpiles,waste streams generated from concrete grinding and sawing, <br /> exposed aggregate processes, dewatering concrete vaults, concrete pumping and <br /> mixer washout waters. (Also refer to the definition for"concrete wastewater" in <br /> Appendix A—Definitions.) <br /> g. Adjust the pH of stormwater or authorized non-stormwater if necessary to prevent <br /> an exceedance of groundwater and/or surface water quality standards. <br /> h. Assure that washout of concrete trucks is performed off-site or in designated <br /> concrete washout areas only. Do not wash out concrete truck drums onto the <br /> ground, or into storm drains, open ditches, streets, or streams. Washout of small <br /> concrete handling equipment may be disposed of in a formed area awaiting <br /> concrete where it will not contaminate surface or groundwater. Do not dump excess <br /> concrete on site, except in designated concrete washout areas. Concrete spillage or <br /> concrete discharge directly to groundwater or surface waters of the State is <br /> Construction Stormwater General Permit Page 29 <br />