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BLAINE 1680 ROGERS AVENUE <br /> TECH SERVICES— SAN JOSE, CA 95112-1105 <br /> (40B)573-7771 FAX <br /> T 'Nwb (406) 573-0555 PHONE <br /> CONTRACTOR'S LICENSE#746684 <br /> www blainetech com <br /> August 23, 2002 <br /> Karen Petryna <br /> Shell Oil Products US <br /> P O. Box 7869 <br /> Burbank, CA 91510-7869 <br /> Thud Quarter 2002 Groundwater Monitoring at <br /> Shell-branded Service Station <br /> 4315 Waterloo Road <br /> Stockton, CA <br /> Monitoring performed on July 31, 2002 <br /> Groundwater Monitoring Report 020731-MM-2 <br /> This report covers the routine monitoring of groundwater wells at this Shell-branded facility. lin <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 any <br /> separate unmiscible layer, water column volume, calculated purge volume (if applicable), elapsed <br /> evacuation time(if applicable), total volume of water removed (if applicable), and standard water <br /> parameter instrument readings. Sample material is collected, contained, stored, and transported to <br /> the laboratory in conformance with EPA standards Purgewater (if applicable) is, hkewise, <br /> collected and transported to the Martinez Refining Company <br /> Basic field information is presented alongside analytical values excerpted from the laboratory report <br /> in the cumulative table of WELL CONCENTRATIONS The full analytical report for the most <br /> recent samples and the field data sheets are attached to flus report <br /> At a minimum, Blaine Tech Services, Inc. field personnel are certified on completion of a forty hour <br /> 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 />