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BLAINE <br /> TECH SERVICES mc. <br /> GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1985 <br /> i <br /> March 28, 2007 <br /> Denis Brown <br /> Shell Oil Products US <br /> 20945 South Wilmington Avenue <br /> Carson, CA 90810 <br /> First Quarter 2007 Groundwater Monitoring at <br /> f Shell-branded Service Station <br /> 2375 West Grant Line Road <br /> Tracy, CA <br /> Monitoring performed on November 28 and <br /> December 14, 2006 and January 22,February 23, <br /> and March 5, 2007 <br /> Groundwater Monitoring Report 070122-EM-1 (Revised) <br /> This report covers the routine monitoring of groundwater wells at this Shell-branded facility. In <br /> accordance with standard procedures that conform to Regional Water Quality Control Board <br /> requirements, routine field data collection includes depth to water,total well depth,thickness of <br /> any separate immiscible layer, water column volume, calculated purge volume(if applicable), <br /> elapsed evacuation time(if applicable),total volume of water removed (if applicable), and <br /> standard water parameter instrument readings. Sample material is collected, contained, stored, <br /> I1 and transported to the laboratory in conformance with EPA standards. Purgcwater(if applicable) <br /> is, likewise, collected and transported to the Martinez Refining Company. <br /> Basic field information is presented alongside analytical values excerpted from the laboratory <br /> report in the cumulative table of WELL CONCENTRATIONS. The full analytical report for <br /> the most recent samples and the field data sheets are attached to this report. <br /> At a minimum,Blaine Tech Services,Inc. field personnel are certified on completion of a forty- <br /> hour Hazardous Materials and Emergency Response training course per 29 CFR 1910.120. Field <br /> personnel are also enrolled in annual eight-hour refresher courses. <br /> SAN JOSE SACRAMENTO LDS ANGELES SAN DIEGO . <br /> 1680 ROGERS AVENUE SA11 JOSE.CA 9611 E-]105 (608)873-0885 FAX (468)673-7771 LIC. 746684 www.bicinatech.com <br />