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.P,f yr. A-4.I 'W 1": <br /> rr -W; <br /> j� 4� <br /> J <br /> IZ:prN <br /> July 3, 1991 07 t7/7,1 <br /> lfcStation 285). Stockton, California <br /> —LaboratoryArialys(-s <br /> The watcF s:1111PIcs Were submitted for analyses of total pe hydrocarbons Jrocarbons j-s gasojij)e <br /> UN 19)11-Sing modified Environmental Protection Agency(F_'P.,k)Method 8015 and benzene. <br /> lobjene, C11120an <br /> benzene. d total �OTILcjje Isomers (13 <br /> Laboratory analyses A <br /> yscs were perfortiled ' X) f-,PA Aluthod 602. <br /> applied Analytical Envir-011ftlental Lihoratorles ill <br /> Sacramento. California (hazardous Waste Testing L-lboratory No. 1;773). 'I'lie results of <br /> these and previous analyses are summarized in Table 2. Copies of the laboratury analysis <br /> reports are included willt this report. <br /> Results of laboratory analyses indicated TP111, was detected in the samples collected fl-0 :11 <br /> wc)h MWA and 11IV-5 at Coucentrallons of 290 parts per billion (ppb) and 2-10 ppb. <br /> respectively. 13clizelm tollielle,e(hylbemcl)e,and xviene iso,jers were detected U, the water <br /> Sample collected front 1110111turing well MW-4 at colicenTrations of 1.4, 1.0, 2.2. and 3.2 ppb. <br /> respectively. A concentration of 0.09 ppb xylene isomers was detected in the sample <br /> collected from well NINV-S. <br /> 1:0ricluslon'; and Recommendatioms <br /> M. <br /> Results indicated JITEX concentrations continue to fluctuate in water samples collected <br /> (roil' welfs LARVA and MW-5. Concentrations of dissolved benzene detected in water <br /> samples from well ,M WA Nkcre above ma-6rill ill, concentration levels for drinking water <br /> Outlined in `Title 22. California Code of lZegtilillion. Sections 64444. Based on dissolved <br /> hydrocarbon concentrations dcjecja,(j <br /> m weil MNV-4, we j-ecc)jj)jncj)d cOj)tij)IjjI?_q qm' rlcrjy <br /> r110111101-Ing We have scheduled the IleM sampling for the week of August 12, 1991, ]n <br /> addition,additiorl, a work pian is in [II-Cparation (or drl'111'111; a Val)Gf-exTranoll well onsite for use in <br /> a vapor-extraction test. The vapor-extraction test will be performed at Ullocal's request to <br /> evaluate whether remediation of soil using vapor-extraction is feasible, <br /> atilt Rlti <br /> 3 <br /> kW <br />