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BLAINE 1680 ROGERS AVENUE <br /> � TECH SERVICES„ SAN JOSE,CA 95112-1105 <br /> (408)573-7771 FAX <br /> (408)573-0556 PHONE <br /> CONTRACTOR'S LICENSE#746684 <br /> • www.blainetech.com <br /> N <br /> April 25, 2002 <br /> Karen Petryna <br /> Shell Oil Products US <br /> P.O. Box 7869 <br /> Burbank, CA 91510-7869 <br /> Second Quarter 2002 Groundwater Monitoring at <br /> Shell-branded Service Station <br /> 341 East Main Street <br /> Ripon, CA <br /> Monitoring performed on April 15, 2002 <br /> Groundwater Monitoring Report 020415-BM-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 immiscible layer, water column volume, appropriate 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. Purge <br /> water (if applicable) is, likewise, collected and transported to the Shell Martinez Manufacturing <br /> Complex. <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 /> hnnr Ra7arcious Materials ani F.merrrenry RecnnngP. traininvy rmincu:ner 99 rFR 1910 190 Finld <br /> personnel are also enrolled in annual eight hour refresher courses. <br /> • <br />