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1 <br />' BLAINE <br /> TECH SERVICES�Nc <br />' GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1988 <br /> ' May 10, 2006 <br /> Denis Brown <br /> ' Shell Oil Products US <br /> 20945 South Wilmington Avenue <br /> Carson, CA 90810 <br /> 1 <br /> Second Quarter 2006 Groundwater Monitoring at <br /> Shell-branded Service Station <br /> 2320 North Eldorado <br /> Stockton, CA <br /> Monitoring performed on April 17, 2006 <br /> ' Groundwater Monitoring Report 060417-DK-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 forry- <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 /> 1660 eOGERS AVENUE SAN JOSE CA 93112 1105 {406)473 0555 FAX (406)573-7771 LIC 746664 www bloine190n Cam <br />