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..� . <br /> a Vv ATER VY OftK 0010. <br /> RESNA <br /> !\DUS[Itlf.� <br /> MAR 21 1^n1 <br /> March 18, 1991 ; ; :.; ;l ENTAL HEALTH <br /> 'E AIT/SERVICES <br /> Eleanor Ratliff <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 2009 <br /> Stockton, CA 95202 <br /> January-March, 199 <br /> Re: Quarterly Monitoring Report, <br /> Gardner Property, 26056 Thornton Rand, Thornton, CAA <br /> , <br /> Site Code 1864 <br /> Dear Eleanor: <br /> ry 27, 1991, WaterWork <br /> As you requested in your letter of FebruaprQ ram at the above <br /> has initiated the quarterly monitoring program <br /> referenced site (Figure 1) . This letter outlines the activities <br /> carter of 1991. Activities during <br /> performed during the first sum ling for dissolved hydrocarbons, <br /> the quarter have nflall weals (MW1, MW2, and MW3) at the project <br /> and monitoring <br /> site. <br /> les ,,.Fere collected from the three wells on Febru- <br /> Groundwater same The samples <br /> ary 1- , 1991, and transported under chain-of-on No. custody <br /> dY protocol <br /> Applied Analytical (DHS certificat ethylbenzene, xylenes (BTEX} <br /> for benzene, toluene, TPHG) , by EPA <br /> were analyzed gasoline ( petroleum <br /> and total petroleum hydrocarbons as g No dissolved <br /> methods 8020 and 8015, respectively. <br /> radiant well MW1. Monitor- <br /> it contained <br /> hydrocarbons were deteeted in the the <br /> hydrocarbon constituents, <br /> ing well MW3, the closest well to the farmer tank p� , <br /> moderate levels of dissolved petroleum by 400 parts per billion <br /> most notably, benzene and 'PPHG at 270 and 4• etroleum hydrocar- <br /> (ppb), respectively. in addition, dissolved P <br /> bons were detected in down-gradient well MV12. <br /> Benzene was de- <br /> bons total xylenes at a .2 ppb, and TPHG at 70 data <br /> tected at 17 ppb, Laboratory <br /> documentation resented in <br /> Analytical results are summarized in Table hydrocarbon <br /> sheets and chThe-estimated dex ant ofthedissolved by <br /> Attachment 1. The <br /> on Figure 3. <br /> plume is dap <br /> 1710 MAIN STREET • ESCALON.CA 95320 • (209)838-3507 <br /> 2350-A 1VALSH AVENUE • SANTA CLARA,CA 95051 (408)496-1249 <br />