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GROUNDWATER <br /> EIDETECHNOLOGY INC. 1401Ha1 Halyard Suite 140 West Sacramento CA 9569 916 372-4700 <br /> � y 1,f ) <br /> FAX(916)372.6781 <br /> September 24, 1993 Project No 02070 4650 <br /> Mr Brett Hunter <br /> Chevron U S A. Products Company <br /> 2410 Camino Ramon <br /> San Ramon, CA 94583-0804 <br /> RE: MONITORING AND SAMPLING ACTIVITIES <br /> FORMER CHEVRON STATION NO. 9-6155 <br /> 9474 HWY 99 AND MORADA LANE <br /> STOCKTON, CALIFORNIA <br /> Dear Mr Hunter <br /> Groundwater Technology, Inc submits this letter as a summary of groundwater monitoring and <br /> sampling data collected at the above-referenced site on August 30, 1993 (Figure 1) The three <br /> sole-related groundwater monitoring wells were gauged to determine depth to bottom (DTB), depth <br /> to groundwater (DTW), and to check for the presence of separate-phase petroleum hydrocarbons <br /> (fable 1) Monitoring wells MW-2 and MW-3 were dry Monitoring well MW-1 was purged and <br /> sampled The MW-1 groundwater sample and rinsate and a trip blank sample were analyzed for <br /> dissolved benzene, toluene, ethylbenzene and xylenes (BTEX), and total petroleum <br /> hydrocarbons-as-gasoline (TPH-G) Results of the chemical analyses are summarized in Table 1 <br /> Laboratory reports and chain-of-custody manifests are included in Attachment I All purge water <br /> generated during the sampling process was collected in a Department of Transportation <br /> (DOT)-approved purge water trader and transported for recycling to the Chevron refinery in <br /> Richmond, Calffomla <br /> Groundwater Technology, Inc is pleased to assist Chevron on this project If you have any <br /> questions or comments please call our West Sacramento office <br /> Sincerely, <br /> Groundwater Technology, Inc. Groundwater Technology, Inc <br /> Written/Submitted by Reviewed/Approved by <br /> BRUCE H EPPLER E K. SIMONIS, R G <br /> Environmental Geologlst Senior Environmental <br /> Project Manager 5 PS tED) Joy, <br /> r <br />.� <br /> PR �� <br /> DSB/BHE/EKS rz Z <br /> Attachments 0 <br /> 4650CLOS LTR No 4422 <br /> Offices throughout the U S Canada and Overseas ���F C`4 L1 F0� <br />