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BLAINE <br /> TECH SERVICES <br /> GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1985 <br /> January 18, 2005 <br /> Karen Petryna <br /> Shell Oil Products US <br /> 20945 South Wilmington Avenue <br /> Carson, CA 90810 <br /> Fourth Quarter 2004 Groundwater Monitoring at <br /> Former Shell-branded Service Station <br /> 1160 West Yosemite Avenue <br /> Manteca, CA <br /> Monitoring performed on December 28, 2004 <br /> Groundwater Monitoring Report 041228-KB-3 <br /> This report covers the routine monitoring of groundwater wells at this former Shell-branded <br /> facility In accordance with standard procedures that conform to Regional Water Quality Control <br /> Board requirements, routine field data collection includes depth to water, total well depth, <br /> thickness of any separate immiscible layer, water column volume, calculated purge volume (1f <br /> applicable), elapsed evacuation time (if applicable), total volume of water removed(if <br /> applicable), and standard water parameter instrument readings Sample material Is collected, <br /> contained, stored, and transported to the laboratory in conformance with EPA standards <br /> Purgewater(if applicable) 1s, Iikewise, collected and transported to the Martinez Refining <br /> Company <br /> Basic field information 1s 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 /> M"Jose 8AcRMENTo 109 ANeEM Uh MEso <br /> 1650 Yl06ERS AVENUr 5AM J08E CA 06112-1106 14081673-MM FAX 0118)675-7771 UC 746654 www blaln*fech COm <br />