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BLAINE 1680 ROGERS AVENUE <br /> TECH SERVICES_ SAN.LOSE, CA 95112-1105 I <br /> (408) 573-7771 FAX <br /> 044� 'T "neo A (408) 573-0555 PHONE <br /> a CONTRACTOR'S LICENSE#746684 <br /> • www blainetech corn <br /> June 11, 2003 <br /> Karen Petryna <br /> Shell Oil Products US <br /> P O Box 7869 <br /> Burbank, CA 91510-7869 <br /> Second Quarter 2003 Groundwater Monitoring at <br /> Shell-branded Service Station <br /> 6131 Pacific Avenue <br /> Stockton, CA <br /> Monitoring performed on May 7, 2003 <br /> Groundwater Monitoring Report 030507-MS-1 <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 unmiscible 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 Iaboratory in conformance with EPA standards Purgewater(if applicable) <br /> is, Iikewise, 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 />