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26105 '00 FRI 09:51 FAX 19251469968 ERMWEST WC r'- 1@002 Rwirmmental Resources MxnagcmC�t 1777 Botelho Drive Suite 260 walnut creek,C.A. 94596 (925)946-0455 (925)946-9%8(Fax) 10 December 1998 Harlin Knoll public Health Services San Joaquin Co=ty 304 E.Weber Avenue,Third Floor ERM® Stockton,CA 95201-0388 Subject: Soil and Ground Water Sampling Results Former Heinz Facility ' Tracv,California Dear Mr.Knoll: This letter presents the results of soil,and ground water samples collected at the former Heinz facility (the site)in Tracy,California. Soil samples were collected during the installation of 4 ground water monitoring wells at the site on 10 November 1.998- Ground water samples were collected from the 4 new monitoring wells and 2 existing monitoring wells on 1.6 November 1998. In accordance with the 4 November 1998 workplan, the soil samples were analyzed for total petroleum hydrocarbons as gasoline (TPI T-g) (EPA Method 8015), total petroleum hydrocarbons as diesel (TPH-d) (EPA Method 8015), and benzene, toluene, ethylbenzene,and xylenes (BTEX) (EPA Method 8020). The ground water samples were analyzed for TPH-g, TFH-d; BTEX,and oxygenated compounds (EPA Method 8260). The soil sampling results are presented in Table 1 (attached). As shown, the samples collected at MW-3,MW-5, and MW-6 contained no detectable concentratiom of TPH-g,TPH-d, or BTEC. The sample collected at MW-4 contained detectable concentrations of TF'H-g and toluene,ethylbenzene, and xylenes. The ground water sampling results are presented in Tables 2 and 3 (attached). As shown,the samples collected from the two wells located upgradient of the former tank locations(MW-3 and MW-5) contained no detectable concentrations of compounds. The concentration of TPH-g and BTEX compounds in the downgradient wells (MW-1 and TVfW-2) were consistent with previous sampling results. As anticipated,the concentrations of TPH-g and BTEX compounds in the wells installed