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• 440 West Charter Way, Stockton, California April 19, 1993 <br /> Texaco Environmental Services Page 2 <br /> on ice, and transported to a California state-certified laboratory, accompanied by a chain-of-custody <br /> manifest <br /> The water samples were analyzed using modified EPA methods 5030/8020/8015, which measure <br /> concentrations of total petroleum hydrocarbons-as-gasoline (TPH-G), and benzene, toluene, <br /> ethylbenzene and xylenes (BTEX) Monitoring wells MW-6, MW-7, and MW-10 are additionally <br /> analyzed biannually for fecal coliform <br /> MW-1 was not sampled due to the presence of SP <br /> GROUNDWATER ANALYTICAL RESULTS <br /> Concentrations of TPH-G in the March 18, 1993 groundwater samples ranged from 180 parts per <br /> billion (ppb) to 150,000 ppb (Figure 3), benzene concentrations ranged from 9 6 ppb to 20,000 ppb <br /> (Figure 4) Analytical results including fecal coliform analyses are presented in Table 3 Copies of <br /> the laboratory analyses reports are presented in Attachment I <br /> Please contact Groundwater Technology's West Sacramento Office d you have questions or <br /> comments regarding this report <br /> Sincerely, <br /> Groundwater Technology, Inc Groundwater Technolog , Inc <br /> Written/Submitted by Rev a Approved by <br /> DANISE SCRIVEN BEGNAUD ME;-�EnvironmentalS W GRAS11, R E <br /> Associate Geologist Geologi IV <br /> Project Manager <br /> E K SIMONIS, R G <br /> Senior EnvironTtatal Geologist <br /> ED <br /> VP <br /> DSB/JWG/EKS rb 5 tED)Ir <br /> Attachments Q3' SPS tp <br /> 32940SR 01 <br /> cc D E Heinrich, Texaco Environmental Services j O <br /> D z <br /> ►�' No.4421 <br /> CALjFOR�t� <br /> GROUNDWATER <br /> —iLi' TECHNOLOGY <br />