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BLAINE <br /> TECH SERVICES INC <br /> GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1985 <br /> March 22, 2006 <br /> Denis Brown <br /> Shell Oil Products US <br /> 20945 South Wilmington Avenue <br /> Carson,CA 90810 <br /> First Quarter 2006 Groundwater Monitoring at <br /> Shell-branded Service Station <br /> 620 West Charter Way <br /> Stockton, CA <br /> Monitoring performed on February 6, 2006 <br /> Groundwater Monitoring Report 460206-EM-1 <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 /> and transported to the laboratory in conformance with EPA standards Purgewater()f 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 LOS ANGELES SAN DIEGO <br /> 1680 ROGERS AVENUE SAN JOSE CA 95112-1105 (4041 573 0355 FAX 1408)673 7771 L1C 746684 www blalnefech com <br />