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WASTE DISCHARGE REQUIREMENTS -2- <br /> UNIVERSITY OF CALIFORNIA <br /> LAWRENCE LIVERMORE NATIONAL <br /> LABORATORY SITE 300 AND <br /> THE U. S. DEPARTMENT OF ENERGY <br /> ALAMEDA AND SAN JOAQUIN COUNTIES <br /> Constituent iql I lbs da <br /> 1 , 1 Dichloroethylene 3 0.002 <br /> 1 ,2 Dichloroethylene 8 0.006 <br /> Trichloroethylene 2.5 0.002 <br /> Tetrachloroethylene 2 0.002 <br /> 1 , 1 Dichloroethane 10 0.0083 <br /> 1 ,2 Dichloroethane 0.5 0.0004 <br /> 1 ,1 ,1 Trichloroethane 100 0.083 <br /> Chloroform 50 0.04 <br /> 7. The Discharger proposes to airstrip the VOCs from the ground water with air- <br /> sparging tanks capable of reducing the VOCs to nondetectable concentrations. The <br /> VOCs are subsequently adsorbed onto activated carbon and the clean air is <br /> discharged. <br /> 8. 40 CFR 125.3 requires the Discharger use the Best Available Technology <br /> economically achievable (BAT) for waste treatment prior to discharge under an <br /> NPDES permit. Airstripping is the BAT for removing VOCs from ground water. <br /> Airstripping can reduce halogenated volatile organic compound (VOC) concentrations <br /> in water to the minimum method detection limits of EPA Methods 601 and 602. <br /> Therefore, this Order provides effluent limitations of nondetectable VOCs. <br /> 9. The Board has adopted a Water Quality Control Plan, 2nd Edition, for the <br /> Sacramento-San Joaquin Delta Basin (5B) which contains water quality objectives <br /> for all waters of the basin. These requirements are consistent with that Plan. <br /> 10. Corral Hollow Creek is underlain by alluvial deposits consisting of permeable sand <br /> and gravel beds overlying clayey gravels interbedded with clayey sands. The <br /> alluvial deposits lie atop layers of interbedded sandstones and siltstones <br /> exhibiting moderate to high permeabilities, alternating with layers of interbedded <br /> siltstones and claystones of low to moderate permeabilities. <br /> 11 . The beneficial uses of Corral Hollow Creek are recreation; esthetic enjoyment; <br /> ground water recharge; fresh water replenishment; and preservation and enhancement <br /> of fish, wildlife and other aquatic resources. <br /> 12. The beneficial uses of the ground water are domestic, industrial and agricultural <br /> supply. <br /> 13. Effluent limitation, and toxic and pretreatment effluent standards established <br /> pursuant to Sections 301 , 302, 304, and 307 of the Clean Water Act and amendments <br /> thereto are applicable to the discharge. <br />