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The Contractor shall prevent the flow of water, including ground water, from mixing with contaminated soil by using <br /> one or a combination of the following measures: <br /> A. Bemis, <br /> B. Cofferdams, <br /> C. Grout curtains, <br /> D. Freeze walls,or <br /> E. Concrete seal course. <br /> If water mixes with contaminated soil and becomes contaminated,the water shall be sampled and tested by a laboratory <br /> certified by the DHS. If levels of contamination are found to be hazardous, the water shall be handled and disposed of as <br /> hazardous waste. <br /> Concrete Waste <br /> The Contractor shall implement practices to prevent the discharge of portland cement concrete or asphalt concrete waste <br /> into storm drain systems or watercourses. <br /> Portland cement concrete or asphalt concrete waste shall be collected at the following locations and disposed of: <br /> A. Where concrete material,including grout,is used; <br /> B. Where concrete dust and debris result from demolition; <br /> C. Where sawcutting, coring,grinding, grooving, or hydro-concrete demolition of portland cement concrete or asphalt <br /> concrete creates a residue or slurry;or <br /> D. Where concrete trucks or other concrete-coated equipment is cleaned at the construction site. <br /> Sanitary and Septic Waste <br /> Wastewater from sanitary or septic systems shall not be discharged or buried within the Department right of way. The <br /> WPCM shall inspect sanitary or septic waste storage and monitor disposal procedures at least weekly. Sanitary facilities that <br /> discharge to the sanitary sewer system shall be properly connected and free from leaks. <br /> The Contractor shall obtain written approval from the local health agency, city, county, and sewer district before <br /> discharging from a sanitary or septic system directly into a sanitary sewer system, and provide a copy to the Engineer. The <br /> Contractor shall comply with local health agency requirements when using an on-site disposal system. <br /> Liquid Waste <br /> The Contractor shall not allow construction site liquid waste, including the following, to enter storm drain systems or <br /> watercourses: <br /> A. Drilling slurries or fluids, <br /> B. Grease-free or oil-free wastewater or rinse water, <br /> C. Dredgings, <br /> D. Liquid waste running off a surface including wash or rinse water,or <br /> E. Other non-storm water liquids not covered by separate permits. <br /> The Contractor shall hold liquid waste in structurally sound,leak proof containers such as: <br /> A. Sediment traps, <br /> B. Roll-off bins,or <br /> C. Portable tanks. <br /> Liquid waste containers shall be of sufficient quantity and volume to prevent spills and leaks. The containers shall be <br /> stored at least 15 in from storm drains,watercourses,moving vehicles,and equipment. <br /> The Contractor shall remove and dispose of deposited solids from sediment traps as provided in "Solid Waste" of these <br /> special provisions,unless determined infeasible by the Engineer. <br /> Liquid waste may require testing to determine hazardous material content before disposal. <br /> Drilling fluids and residue shall be disposed of outside the highway right of way. If the Engineer determines that an <br /> appropriate location is available, fluids and residue exempt under California Code of Regulations, Title 23, Section 2511(g) <br /> may be dried by infiltration and evaporation in a leak proof container. The remaining solid waste may be disposed of as <br /> provided in"Solid Waste"of these special provisions. <br /> Contract No. l 0-OM7104 <br /> 141 <br />