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l J� —• <br /> CHAPTER 3 <br /> LABORATORY ANALYTICAL RESULTS <br /> f <br /> To evaluate soil and groundwater quality beneath the ARCO <br /> Petroleum Products Company (ARCO) Service Station 6080 site, six <br /> soil samples and three groundwater samples were collected and <br /> analyzed. The soil samples were analyzed for total petroleum fuel <br /> hydrocarbons (U.S. Environmental Protection Agency (EPA) Method <br /> 8015, modified) , and benzene, toluene, and xylene (BTX) (EPA Method <br /> 8020) . The groundwater samples were analyzed for EPA 8015 modified, <br /> r total lead, and EPA 602 BTX in fluid. All analyses were completed ' <br /> j <br /> at Brown and Caldwell's (EC) . California 7epartraent of Health <br /> Services certified Emeryville laboratory. <br /> t <br /> k Soil Quality , <br /> Sligrtly--' detectable concentrations of totalhydro- <br /> carbons;; were found 'yin two so-l' samples, AL-r1-1 and.;.AL 5--1, using <br /> ` U.S. Environmental Protection Agency (EPA) Method 8015 modified. <br /> The concentrati'ors were 29 -'and :10' m_illig rams per xilograin (mg/kg) , <br /> respectively. "'Using EPA Method 8020 testing for benzene, toluene, <br /> and xylene (BTX) , no detectable hydrocarbons were found. No <br /> standard for total petroleum hydrocarbon has been set. The ' <br /> suggested designated levels. for BTX in a solid, for the protection <br /> ofroundwater <br /> g quality, are 0.7 mg/kg, 100 mg/kg, and 620 mg/kg. <br /> The detection limit for each constituent is below its suggested ; <br /> designated level. Designated levels for these constituent.; are <br /> X= <br />' a identified in "Water Quality Objectives and Hazardous and Designated <br /> 14 <br /> Levels for . Chemical Constituents," published by the California ` <br /> ry Regional Water Quality Control Board, Central Valley Region, in <br /> September 1986. Results or the samples submitted for laboratoi:y <br /> analysis are--sI,,own in` Table -3-1. The complete analytical results <br /> are inaludf�d in Appendix A. <br /> PF <br /> 17 <br /> t <br /> x . <br /> s k� <br />