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BLAINE 1680 ROGERS AVENUE <br /> TECH SERVICES- SAN JOSE, CA 95112-1105 <br /> (408) 573-7771 FAX <br /> • w� <br /> 147 T", (408) 573-0555 PHONE <br /> CONTRACTOR'S LICENSE#746684 <br /> `. www.blainetech.com <br /> April 25, 2000 <br /> Brett Hunter <br /> Chevron U.S.A. Products Cor-lpany <br /> P.O. Box 6004 <br /> San Ramon, CA 94583-0904 <br /> 1st Quarter 2000 M011it0l'ing at 9-0557 <br /> First Quarter 2000 Groundwater Monitoring at <br /> Chevron Service Station Number 9-0557 <br /> 139 South Center Street <br /> Stockton, CA <br /> Monitoring Performed on February 2, 2000 <br /> Groundwater Sampling Report 000202-Al-1 <br /> This report covers the routine monitoring of groundwater wefts at this Chevron facility. Blaille <br /> Tech Services, Inc.'s work at the site includes inspection, gauging, evacuatiotl, purgewater <br /> containment, sample collection and sample liaridling in accordance with standard procedures that <br /> conforry to Regional Water Quality Control Board requirements. <br /> Routine field data collection r17C]LldCS dC]]tll to Ovate]', total well dCIA11, thicl(ness of any scpal',itc <br /> immiscible Dryer, water column volume, calculated volume of a three-case VOILIMc ])urge, <br /> elapsed evacuation time, total voltlrne of water- removed, and standard ,vater parameter <br /> instrument readings. Sample material is collected, contained, stored, and trarlspartcd to the <br /> laboratory in conformance with EPA standards. Purgewater is, likewise, collected and <br /> transported to McKittrick Waste Trcatnlcnt Site for disposal. <br /> Basic field information is presented alongside analytical values eXcerpted frorll the laboralory <br /> report ir] the Cumulative table of '"'l?LL DATA AND ANALYTICAL RESULTS. The full <br /> analytical report for the most recent samples is located in the Analytical Appendix. The table <br /> also contains new groundwater elevation calculations taken front the computer blotted gradierll <br /> map which is located in the Professional Engineering Appendix. <br /> Blaine Tech Services, Inc. Repori No. 000202-M-1 #st-0 2000 Monitoring ai Chevron 9-4557 <br />