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10 BLAINE <br /> TECH SERVICES INC <br /> GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1995 <br /> August 31, 2005 <br /> Denis Brown <br /> Shell Oil Products US <br /> 20945 South Wilmington Avenue <br /> Carson, CA 90810 <br /> Third Quarter 2005 Groundwater Monitoring at <br /> Shell-branded Service Station <br /> 620 West Charter Way <br /> Stockton, CA <br /> Monitoring performed on August 8,2005 <br /> Groundwater Monitoring Report 050808-DK-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 /> and transported to the laboratory in conformance with EPA standards Purgewater(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 /> SA71 JOSE SACRAMENTO LOS ANGELES SAN DIEGO <br /> 1690 R06E99 AVENUE SAN JOSE CA 96112 1105 (106)673 0566 FAX (603)073 7771 LIC 746684 www blalnel*Ch CDT <br />