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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 constduents 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, California <br /> LABORATORY ANALYSIS <br /> One soil sample from each of the sampled abandoned borings will be analyzed for benzene, toluene, <br /> ethylbenzene, xyienes (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 /> ■ MWA 1 monitor and sample annually <br /> Upon receiving field and analytical results, a report will be prepared by Groundwater Technology to <br /> document findings 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) 372-47oo <br /> Sincerely, <br /> GROUNDWATER TECHNOLOGY, INC. GROUNDWATER TECHNOLOGY, INC <br /> Written/Submitted by Reviewed/Approved by <br /> - /�<,_ e�4 E'Z_BRUCE H EPPLER E K SIMONIS, R G <br /> Environmental Geologist Senior Environmental Geologist <br /> Project Manager Ep G�o� <br /> ti <br /> 1 ED1 <br /> BHE/EKS rb <br /> . Attachment c^1 <br /> w£uL+aND wKP Z <br /> W No 4422 <br /> GROUNDWATER <br /> � ��'CALIFOR �:_� TECHNOLOGY <br />