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Environmental <br /> Resources <br /> Management <br /> 1777 Botelho Drive <br /> Suite 260 <br /> { Walnut Creek,CA 94596 <br /> (925)946-0455 <br />' 15 December 2004 (925)946-9968(fax) <br /> D E C 1 6 2004 <br />' Mr Harlin Knoll ENVIR€ NIVIr�, � tiR <br /> Public Health Services PEWITISERVGES <br />' San Joaquin County <br /> 304 E Weber Avenue, Third Floor -0e <br /> Stockton, CA 95201-0388 ERM® <br /> Subject 2004 Annual Ground Water Monitoring Results <br /> 1 Former Heinz Facility <br /> Tracy, California <br /> Dear Mr Knoll <br /> On behalf of Heinz North America (Heinz), Environmental Resources <br /> Management (ERM) has prepared this letter to present the results of the <br /> 2004 annual ground water sampling event conducted at the former <br /> Heinz facility (site) in Tracy, California <br /> GROUND WATER SAMPLING RESULTS <br /> Water level measurements and ground water samples were collected from <br /> eight monitoring wells on 29 September 2004 Ground water samples were <br /> analyzed for total petroleum hydrocarbons as gasoline (TPH-g) (United States <br /> Environmental Protection Agency [USEPAI Method 8015), and benzene, <br />' toluene, ethylbenzene, and xylenes (BTEX) (USEPA Method 8020) Sampling <br /> locations are shown on Figures 1 and 2 Analytical results for ground water <br />' for the current and previous sampling events within the former Tank 1 area <br /> and the former Tank 2 area are summarized in Tables 1 and 2, respectively <br /> Ground water elevation measurements taken during the sampling event are <br />' included in Table 3 Copies of the laboratory analytical results are attached <br /> (Appendix A) <br />' The ground water sampling results are summarized below <br />' Former Tank 1 Area Location <br /> No detectable concentrations of chemicals were reported at MW-3 or <br /> MW-7 (Figure 1) Hydrocarbon concentrations at MW-1 were within the <br /> range of historical values, while concentrations at MW-4 were below <br />