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California Department of Transportation July 7, 1994 <br /> Project No 102818-01 <br /> a cooler contairung ice, and transported to Quality Assurance Laboratones for chemical <br /> testing under ch in-of-custody protocol <br /> Do <br /> ANALYTICAL a <br /> Groundwater samples collecte ere ;Valyzed for total petroleum hydrocarbons (TPH) as <br />' gasoline by EPA test method 8015-modified Department of Health Services (DHS), TPH as <br /> diesel by EPA test method 8015-modified DHS, and benzene, toluene, ethylbenzene, and <br />' xylenes (BTEX) by EPA test method 8020 Soil samples collected from the two stockpiles <br /> were analyzed for TPH as gasoline, BTEX, and total lead (EPA method 7241) <br /> ANALYTICAL RESULTS <br />' TPH as gasoline was detected at a concentration of 2,570 micrograms per liter (µg/C) in the <br /> groundwater sample collected from morutoring well MW-10 and at a concentration of 52 2 <br /> Ag/Cin the sample collected from monitoring well MW-14 TPH as gasoline was not detected <br /> in concentrationsg reater than the detection limit in groundwater samples collected from <br /> morutoring wells MW-11, MW-12, MW-13, MW-16, MW-19, MW-20, and MW-24 TPH as <br /> diesel was not detected in concentrations greater than the detection limit in groundwater <br /> 1 <br /> samples collected <br /> Elevated concentrations of BTEX were detected in groundwater samples collected from <br /> monitoring wells MW-10, MW-11, MW-12, MW-13, MW-14, MW-19, and MW-24 <br /> Concentrations of benzene ranged from less than the detection limit to 13,000 µg/C, <br /> concentrations of toluene ranged from less than the detection limit to 3,400 gg/C, <br /> concentrations of ethylbenzene ranged from less than the detection limit to 22 9 µg/C, and <br /> concentrations of xylenes ranged from less than the detection limit to 2,800 µg/C BTEX was <br /> f <br /> not detected in groundwater samples collected from monitoring wells MW-16 and MW-20 <br /> A summary of the res�off tth�he�� groundwater analysis is presented as Table 2 The <br /> laboratory analytical rx l lain quality control/quality assurance data and chain of <br /> custody documentation, is pres s ix C <br /> 5 py"wo&PI r,a <br />