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BLAINE <br /> TECH SERVICES SWC <br /> GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1485 <br /> January 12,2006 <br /> Denis Brown <br /> Shell Oil Products US <br /> 20945 South Wilmington Avenue <br /> Carson, CA 90810 <br /> Fourth Quarter 2005 Groundwater Monitoring at <br /> Former Shell-branded Service Station <br /> 1160 West Yosemite Avenue <br /> Manteca, CA <br /> Monitoring performed on December 22,2005 <br /> Groundwater Monitoring Report 051222-DK-2 <br /> This report covers the routine monitoring of groundwater wells at this former Shell 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 /> • <br /> SAN Daae <br /> iilcOMENio Lai ANGELES SAN OTE00 <br /> 16800MRSAVENUE Ili JOIE-GA"112-1 ion (401)n13-0588 VAX (408)673-7771 uc 746694 www btairlefsor com <br />