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} <br /> SmnplingReport—P.G.&E,Stoclaon,C1 October,2003 <br /> q <br /> The analytical results for the two waste oil pie trench sam Iles were n - <br /> P p on detectable for all of the <br /> analytes except for metals and tetrachloroethylene (PCE). ,All of the LUFT five metals except <br /> cadmium were detected in the samples at what appear to be inaturally occurring background levels. 4 <br /> PCE was detected in Pl- and P2 at concentrations of 0.0079 and. 0.0055 pprn, respectively. The <br /> analytical data is summarized on Table 1. Copies of the laboratory data sheets and the chain of custody <br /> are attached to this report. <br /> The analytical results for the two unleaded gasoline dispenser samples were non-detectable for all of + <br /> the analytes except for MTBE. MTBE was detected in UNL 1 and LTNL 2 at concentrations of 1.5 <br /> and 0.0055 ppm, respectively. <br /> The analytical results of the sample collected from beneath the diesel dispenser was non-detectable for <br /> all of the analytes except for TPH as diesel and TPH as gasoline, which were detected -.at <br /> concentrations of 140 and .4. <br /> 2 m, respectively. The anal 'cal data is <br /> PPsummarized o <br /> n Table 2 <br /> Yu . Copies <br /> of the laboratory data sheets and the chain of custody are attached to this report. <br /> Environental Screening Levels" (ESLs) for concentratio <br /> mns. of contaminants in soils and <br /> groundwater have been established b the Regional Water Qualty Cont <br /> rol Board (RWQCB}. r <br /> The ESLs for the analytes encountered in the soil samples are',shown on Tables 1 through 3. The <br /> ESLs from Table A assume that groundwater is a source of rinking water, and are therefore the <br /> most conservative screening levels for these compounds..ounds. The <br /> a p ESLs from Table B assume that � <br /> groundwater is not a source of drinking water. <br /> E i <br /> All of the analytes from the two waste oil.pipe trench samples are below both the residential and <br /> commercial ESLs. The occurrences of MTBE in samples UNL 1 and LTNL 2, and of diesel in the <br /> sample from below the diesel dispenser, are above the ESLs&m, Table A, but below the ESLS <br /> from Table B. i[ <br /> E <br /> 3 a <br /> L <br />