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BLAINE <br /> TECH SERVICES SNC <br /> GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1965 <br /> October 22, 2004 <br /> Karen Petryna <br /> Shell Oil Products US <br /> P O Box 7869 <br /> Burbank, CA 91510-7869 <br /> Third Quarter 2004 Groundwater Monitoring at <br /> Shell-branded Service Station <br /> 1160 West Yosemite Avenue <br /> Manteca, CA <br /> • Monitoring performed on September 28, 2004 <br /> Groundwater Monitoring Report 040928-MS-2 <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 /> SAN JOSE SACRAMENTO LOS ANGELES 80401 DWGO <br /> lean ROGERS AVENUE &AN.ICS¢.CA 45112-1103 (4091 a73-0558 PAX (408)473-7771 UC 746694 www blatnetech com <br />