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rF <br /> I <br /> BLAINS <br /> TECH SERVICES J. <br /> GROUNDWATER SAMPLING SPECIALISTS <br /> SINCE 1985 <br /> jk <br /> January 18, 2005 <br /> Karen Petryna G <br /> Shell Oil Products US <br /> 20945 South Wilmington Avenue <br /> Carson, CA 90810 <br /> .i <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 /> s <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 conformito Regional Water Quality Control <br /> Board requirements,routine field data collection includes depth to water,total well depth, I <br /> thickness of any separate immiscible layer,water column volume, calculated purge volume (if <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) is, likewise, collected and transported to the Martinez Refining <br /> Company. <br /> Basic field information is presented alongside analytical values excerpted from the laboratory Y <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 /> ' f <br /> SAN JOSE SACRAMENTO LOS ANGELES SAN DIEGO- <br /> 1080ROGERS AVENUE SAN JOSE,CA 9511 R•/105 (4081875.0888 FAX (4081 878-77 71 1 UC. 744884 www.blolnetoch.com } <br /> Y <br /> I <br />