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1 <br /> Envir iumenra&Engineering Cnnsulranrs <br /> January 8, 1993 <br /> Job No. 4780200 <br /> 1 Ouikrete of Northern California <br /> 6018 Stewart Avenue <br /> 1 Fremont, California 94538 <br /> ATTN: Mr. Allen Law <br /> 1 SUBJECT: SUBSURFACE SOIL INVESTIGATION <br /> 820 South American Street <br /> Stockton, California <br /> 1 Gentlemen: <br /> Pursuant to our workplan dated December 23, 1992, EZC, Inc. has completed a <br /> subsurface investigation at the aforementioned subject site. The purpose of this <br /> investigation was to assess the likelihood that soils beneath the site have been <br /> 1 adversely impacted by the former presence of hydrocarbons contained within <br /> Underground Storage Tanks (USTs)• <br /> Soil samples collected at the time of this investigation were analyzed for petroleum <br /> hydrocarbons and Volatile Organic Compounds (VOCs). The laboratory reported that <br /> 1 soil samples from one of the borings has high concentrations of Total Petroleum <br /> Hydrocarbons in the form of gasoline (TPHg) and its VOC constituents Benzene, <br /> Toluene, Ethyl benzene, and Xylenes (BTEX). Based on the laboratory report for the <br /> 1 samples collected for analysis from the site, field observations and our professional <br /> judgement, it appears that the soils at the site have been adversely impacted by <br /> TPI-Ig and BTEX which has been released from the former USTs. <br /> 1 Should you have any questions or require supplemental information, please do not <br /> hesitate to contact us. <br /> i <br /> Sincerely, Q��V\RO^rFy� <br /> N <br /> 1 _. �� ` <br /> c� 2 00450 � <br /> Robb Welch enda.11 W. rice, EA <br /> p %l3 <br /> Staff Geologist President <br /> F OF CAx\FAQ <br /> 1 122O Crossman Avenue. Suite 200•Sunnyvale. Califnmia 940M•(40B)747-1414 •FAX(406)745-/B6g <br />