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April 4, 2012 <br /> soils received, time of storage, and/or the types of contaminants and levels <br /> of contamination present will all be limited to assure exposure risks are no <br /> greater than 10-6. The following limitations apply: <br /> Acreage of Chlorinated Hydrocarbon-Contaminated Soil Treatment — <br /> 0.5 acres <br /> Concentration of Contaminants in mg/kg: <br /> Volatile Organic Compounds <br /> Benzene— 5.0 x 10-1 <br /> Toluene—6.9 x 10-1 <br /> Ethylbenzene—9.9 x 102 <br /> Xylene— 1.3 x 104 <br /> Chlorinated Hydrocarbons <br /> Trichloroethylene— 1.0 <br /> Perch loroethylene— 1.0 x 101 <br /> 1,2 Dichloroethane—2.0 x 10-1 <br /> 1,1 Dichloroethane- 1.0 x 10-2 <br /> 1,1,1 Trichloroethane— 1.0 x 101 <br /> Methylene Chloride— 1.0 <br /> PAHs (carcinogenic) —7.5 x 101 <br /> PCBs- 1.0x101 <br /> PCDD/Fs—3.0 x 10-5 <br /> Cresol —4.0 x 103 <br /> Metals <br /> Arsenic—5.0 x 101 <br /> Beryllium —7.5 <br /> Cadmium— 1.0 x 101 <br /> Chromium III —4.0 x 102 <br /> Copper-2.2 x 102 <br /> Lead -5.0 x 101 <br /> Mercury—2.0 <br /> Nickel—2.0 x 102 <br /> Zinc—9.2 x 101 <br /> To mange both on-and off-site impacts due to the on-site aeration or <br /> treatment of contaminated soils, the concentration of chlorinated <br /> hydrocarbons in the soil will be restricted to lower levels than those <br /> assumed in the health risk assessment contained in the Forward Final EIR <br /> (1993). <br /> Page 17 <br />