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5608 North Pershing Avenue, Stockton, California July 29, 1993 <br /> Chevron U.S.A. Products Company Page 2 <br /> soil sample will be field screened for volatile petroleum constituents using a portable photoionization <br /> detector (PID). <br /> Each sample will be sealed, labeled,:and stored on Ice for manifested transport to Groundwater <br /> Technology Environmental Laboratories (GTEL) in Concord, Califomia. <br /> LABORATORY ANALYSIS <br /> One soil sample from each of the sampled abandoned borings will be analyzed for benzene, toluene, <br /> ethylbenzene, xylenes (BTEX) and total petroleum hydrocarbons-as-gasoline (TPH-G) using EPA <br /> modified Method 8020/8015. <br /> MONITORING AND SAMPLING <br /> This work will be conducted in coordination with the ongoing groundwater monitoring and sampling <br /> Program at the site. Groundwater monitoring and sampling will be conducted following well <br /> abandonment on approximately September 1, 1993 under a revised sampling schedule. The revised <br /> schedule is as follows: <br /> MW-4A, and 9 monitor and sample quarterly. <br /> MW-8 and 10 monitor and sample semi-annually (every 6 months). <br /> MW-11 monitor and sample annually. <br /> Upon receiving field and analytical results, a report will be prepared by Groundwater Technology to <br /> document Wings. Groundwater Technology is pleased to be of service to you at this site. If you <br /> should have any questions please contact the West Sacramento office at (916) 372-4700. <br /> Sincerely, <br /> GROUNDWATER TECHNOLOGY, INC. GROUNDWATER TECHNOLOGY, INC. <br /> Written/Submitted by <br /> Reviewed/Approved/ pproved by <br /> BRUCE H. EPPLER <br /> Environmental Geologist EX SIMONIS, R.G. <br /> Project Manager Senior Environmental Geologist <br /> �,F CF�� <br /> 13HE/EKS:rb <br /> Attachment 2' <br /> WEUA9ND.WKP <br /> Z <br /> W No.4422 c <br /> GROUNDWATER <br /> CA Ll �[]I TECHNOLOGY { <br /> i' <br />