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am '931.Pn.N1.; <br /> ���❑ <br /> n GROUNDWATER <br /> ❑❑ TECHNOLOGY INC. 1401 Halyard Drive.Suite 140 West Sacramento CA 95691 916 372-4700 <br /> FAX(9I6)372-8781 <br /> ,tune 25, 1993 Project No. 02070 4367 <br /> Mr. Brett L Hunter S E P 2 7 1993 <br /> Chevron U.S.A. Products Company. GIVV1kGIvMNTAL HEALTH <br /> 2410 Camino Ramon <br /> San Ramon, CA 94583-0804 PERMIT/SERVICES <br /> RE: QUARTERLY MONITORING AND SAMPLING ACTIVITIES ` <br /> CHEVRON SERVICE STATION NO. 9-0302 <br /> 6421 PADDOCK PLACE <br /> L.ODI, CALIFORNIA <br /> Dear Mr. Hunter: <br /> Groundwater Technology, Inc. submits this letter as a summary of quarterly groundwater monitoring <br /> and sampling data collected at the above-referenced site on May 18, 1993. The three groundwater <br /> monitoring wells at the site were gauged to determine depth to groundwater (DTW) and to check for <br /> the presence of separate-phase petroleum hydrocarbons. A potentiometric surface map (Figure 1) <br /> and a summary of groundwater monitoring data (Table 1) are included. After measuring DTW, each <br /> monitoring well was purged and sampled. The groundwater samples were analyzed for dissolved <br /> benzene, toluene, ethylbenzene and xylenes (BTEX), total petroleum hydrocarbons-as-gasoline <br /> (TPH-G), and organic lead. Results of the chemical analyses are summarized in Table 1. <br /> Laboratory reports and chain-of-custody manifests are included in Attachment 1. All purge water <br /> generated during the sampling process was collected in a Department of Transportation (DOT)- <br /> approved purge water trailer and transported for recycling to the Chevron refinery in Richmond, <br /> California. <br /> Groundwater Technology, Inc. is pleased to assist Chevron on this project. If you have any <br /> questions or comments please call our West Sacramento office. <br /> Sincerely, <br /> Groundwater Technology, Inc. Groundwater Technology, Inc. _ <br /> Written/Submitted by Reviewed/Approved by <br /> BRUCE H. EPPLER E. K. SIMONIS, R.G. ED GE <br /> Environmental Geologist Senior Environmental G <br /> Project Manager <br /> c, PS1ED1Irsc� <br /> PR & <br /> DSB/ HE/EKS:rb 35Z <br /> Attachments D <br /> 0 N0.4422 y <br /> 42a3orRz.�r� <br /> Offices throughout the U.S.,Canada and Overseas � r <br /> �A'CA f <br />