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s <br /> BLAINE 1680 ROGERS AVENUE <br /> TECH SERVICES. SAN JOSE,CALIFORNIA 65112 <br /> (408)573-7771 FAX 4 r <br /> On <br /> TH (408)573-0555 PHONE - e rfr ! <br /> � ju';' 3!� PFJ 1: 39 <br /> June 20, 1997 <br /> Brett Hunter <br /> Chevron U S.A. Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583-0904 <br /> 2nd Quarter 1997 monitoring at 9-1848 <br /> Second Quarter 1997 Groundwater Monitoring at <br /> Chevron Service Station number 9-1848 <br /> 1257 Yosemite Avenue <br /> Manteca, California <br /> Monitoring performed on May 21, 1997 <br /> Groundwater Sampling Report 970521-H-2 <br /> This report covers the routine quarterly monitoring of groundwater wells at this Chevron facility. <br /> Blame Tech Services, Inc work at the site includes inspection, gauging, evacuation, purgewater <br /> containment, sample collection and sample handling in accordance with standard procedures that <br /> conform to Regional Water Quality Control Board requirements. <br /> Routine field data collection includes depth to water, total well depth, thickness of any separate <br /> immiscible layer, water column volume, calculated volume of a three case volume purge, <br /> elapsed evacuation time, total volume of water removed, and standard water parameter <br /> instrument readings. Sample material is collected, contained, stored, and transported to the <br /> laboratory in conformance with EPA standards Purgewater is, likewise,collected and <br /> transported to McKittnck Waste Treatment Site for disposal <br /> Basic field information is presented alongside analytical values excerpted from the laboratory <br /> report in the cumulative table of WELL DATA AND ANALYTICAL RESULTS. The full <br /> analytical report for the most recent samples is located in the Analytical Appendix. The table <br /> i <br /> 9laine Tech Services,Inc Report No 970521-H-2 2nd-O 1997 Monitoring at Chevron 9-1848 <br />