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i. <br /> " 4 <br /> � tAL <br /> ,_ �: Chevron <br /> rte SEP 2-0 pi", 1` 05 ' I <br /> G Chevron U-SA.Products CompanY <br /> 6001 Bollinger Canyon Rd., Bldg. L <br /> P.O. Box 5004 <br /> San Ramon, CA 94SM804 <br /> -Site Assessment&Remediation Groep <br /> Phone(510)842-9500 <br /> September`22, 1995 <br /> i, <br /> Mr.Harlin Knoll <br /> Sari Joaquin County Public Health Services <br /> P.O. Box 2009 <br /> Stockton, CA 95201 <br /> t, Re: Chevron Station#.9-4183 236 N.Ham Lane Lodi CA <br /> Attached Soil and Groundwater Investigation Report(Pacific, 9113195) <br /> 1 <br /> { <br /> . i <br /> Dear Mr.Knott: <br /> _ Please find attached a reportdated.September 13, 1995;which was prepared by Chevron's consultant, <br /> 'Pacific Environmental Group,Inc. (Pacific),to describe the results of their subsurface investition that <br /> was performed at the subject-site on July 25=26,,1995. During their investigation Pacific drilled four soil- <br /> borings and converted each to groundwater monitoring wells.As part of their investigation Pacific also <br /> conducted a database search to identify potential offsite contaminant sources. <br /> Soil samples were collected during the drilling of all four groundwater monitoring wells. Samples from <br /> each well/boring were analyzed for TPHGas and BTEX constituents. In addition,samples collected from <br /> well/boring MW-3 were analyzed fbr total oil and grease,metals,TPHDiesel,VOC's,and SVOC's.. <br /> Except for the metals chromium;nickel and zinc,none of the above analytes were detected. The metal <br /> concentrations detected appear to be representative of background levels. <br /> After being installed,each groundwater monitoring well was gauged and sampled.The measured depth to . <br /> groundwater beneath"the'site was approximately 43 feet.below grade. The measured direction of <br /> groundwater flow was toward the southwest. Groundwater samples were collected from each well and <br /> analyzed according to the protocol described above for soil..All analytes tested for were non-detect with <br /> the exception of 6.0 ppb tetrachlorethene and 26 ppb cadmium from well MW-3:Results of•soil sampling <br /> at the site:.suggest no onsite source of these contaminants. Further groundwater monitoring will be <br /> 44 performed to confirm their presence. <br /> Results of Pacific's data base search identified 19 hazardous material sites within one mile of the subject <br /> site.Two of these were leaking UST sites.The closest of these two is a Circle K located approximately. _ <br /> 350 feet to the northeast(up gradient).Results of groundwater.analyses suggest no petroleum hydrocarbon <br /> impact from offsite sources. <br /> If you have any questions or.comments,Tcan be reached at(510) 842-8695. <br />