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GEst M Z8 <br /> �""MIT 2 ow� <br /> I <br /> Mr. R. R.Zielinski 202/150 4150 <br /> March t9, 1991 Page 3 <br /> The water samples were analyzed using mod-led EPA methods 5630/43020/87315, which measure <br /> concentrctlons of total petroleum hydrocarbons-as-gasoline(TPH-G),and benzene,toluene,eth}lbenzene, <br /> and xylenes(BTEX). Ccples of the laboratory analysis reports and chain-of-custody manifest are presented <br /> In Attachment 11. <br /> GROUNDWATER ANALYTICAL RESULTS <br /> Cancentratlons of TPH-G in the groundwater samples;ranged from W Farts per 6110oh,(ppb)tq'841'000ppb; <br /> hlgher levels thin those.reparted for the_prevfous qua•er, ZI?t-3,G concentrations In groundwater for <br /> February 8, 1991 are shown in Figure 2. The benzene concentrations ra .ged from 2 to 25,000 ppb, <br /> Benzene concentrations In groundwater for the same sampling event are shown la Figure 3. Results of the <br /> analyses Pre presented in Table 2(,attachment III). <br /> Please contact Groundwater Technology's West Sacramento Office If you have questions or comments <br /> regarding this quarterly report. <br /> Sincerely, <br /> GROUNDWATER TECHNOLOGY, INC. <br /> MARTIN J.4STENDORF <br /> Senior Project Geologist <br /> a <br /> JOHN E. BOWER j <br /> Environmental Geologist <br /> Project Manager f <br /> U <br /> E. K. SIMONIS S(EI)) <br /> California Registered <br /> Geologist, No.4422 k 4, <br /> No.4422 <br /> MJO/J1B/EISS:rc <br /> Attachments <br /> +' <br /> � R <br /> jf OF C 6,111 1' s <br /> ,. <br /> j <br /> �i <br /> '$IT GROUNDWATER <br /> TECHNOLOGY,INC. <br /> r , <br />