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BLAINE <br /> TECH SERVICESo4c <br /> GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1983 <br /> July 6, 2005 <br /> Denis Brown <br /> Shell Oil Products US <br /> 20945 South Wilmington Avenue <br /> Carson,CA 90810 <br /> Second Quarter 2005 Groundwater Monitoring at <br /> Former Shell-branded Service Station <br /> 1160 West Yosemite Avenue <br /> Manteca,CA <br /> . Monitoring performed on June 14,2005 <br /> Groundwater Monitoring Report 05061.4-DK-1 <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 Refimng 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 /> MN Jew SACQMAENTo Los ANGBXA UN Diwo <br /> 16i0A0GEOSAWNUE 6ANJOU.CA 96119-1106 [,061673-UN FAX [406)676 7771 LC 74"" WWW b[n1n414oh eom <br />