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MOBILE CHEM LABS INC. <br /> 1678 Reliez Valley Road • Lafayette, CA 94549 <br /> Phone (925) 945-1266 • Fax (925) 943-6884 <br /> 800530\2162\014281 <br /> CH2M HILL <br /> 155 Grand Ave. , Suite 1000 <br /> Oakland, CA 94612 Date Sampled: 04-14-04 <br /> Attn: Diane Sarmiento Date Received: 04-14-04 <br /> Project Manager Date Analyzed: 04-14-04 <br /> SOIL <br /> Sample Sample Detection Total Extractable <br /> Number Description Limit Petroleum Hydrocarbons <br /> ppm ppm <br /> PG&E Lathrop Remediation <br /> 5441 West Undine Rd. , Lathrop, CA <br /> Project # 283984. 0l.SA <br /> B044007 90SW1-10 Diesel 5 <5 <br /> Motor Oil 250 <250 <br /> B044008 90B2-12 Diesel 10 800 <br /> Motor Oil 500 <500 <br /> B044009 90SW3-9 Diesel 10 2, 900 <br /> Motor Oil 500 <500 <br /> B044010 90SW4-8 Diesel 10 50 <br /> Motor Oil 500 <500 <br /> Note: Duplicate Deviation on B044008 is 14 <br /> Spike Recovery B044007 is 91 <br /> LCS Recovery is 96 % <br /> Note: Analysis was performed using EPA method 3550 modified and <br /> TPH LUFT(8015MOD) . <br /> (Ppm) = (m9/kg) <br /> MOBILE CHEM LABS <br /> Ronald G. Evans <br /> Lab Director <br />