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10 BLAINE <br /> TECH SERVICES ewe <br /> GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1985 <br /> May 3, 2005 <br /> Karen Petryna <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 /> 1071 North Main Street <br /> Manteca, CA <br /> Monitoring performed on April 12, 2005 <br /> Groundwater Monitoring Report 050412-BS-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 /> RAN d0S2 SACRAMENTO LOS AM6EIM SAN 131200 <br /> 16SO 110GERE AVENUE RAM JCK.CA 96112.1106 (4011573.011011 FAX (400)ala-7771 UC 146684 WWW Dfalffetw0h aom <br />