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RON <br /> Mr. R.R. Zielinski <br /> 02320 0075 September 24, 1991 <br /> Page 2 <br /> ethylbenzene and xylenes IBTEXI. Copies of the laboratory analysis reports and chain-of-custody <br /> manifest are presented in Artachment C. <br /> GROUNDWATER ANALYZ-ICAL RESULTS <br /> Concentrations of TPH-G in the groundwater samples ranged from 430 parts per billion(ppb)to 82,000 <br /> ppb. The benzene concentrations ranged from 7 to 20,000 ppb. i PH-G and benzene concentrations <br /> in groundwater for August 9, 1991,�c:hnwn in Figures 2 and 3(Attachment A),are generally lower than <br /> those reported the previous quarter. Table 2 (Attachment D), presents results of the laboratory <br /> analyses for the last five sampling events. <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.61TENDORF <br /> Senior Project Geologist <br /> JOHN E. [SOWER <br /> Environmental Geologist <br /> Project Manager <br /> E. K. SIMONIS <br /> California Registered Lu' <br /> Geologist, No.4422 h,o.4422 <br /> MJO/JEB/EKS:rc <br /> Attachments <br /> 00760TR.PA <br /> 1 • <br /> GRGROUNDWATER <br /> '..J TmINO.UGY <br /> R - <br />