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• TABLE 1 - SOIL CHEMICAL ANALYTICAL DATA <br /> Tosco (Former Unocal) Service Station 46951 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Sample Ethyl- Total <br /> Sample Sample Depth TPHg Benzene Toluene benzene Xylenes MtBE <br /> Number Date (feet bgs) (ppm) (ppm) (ppm) (ppm) (ppm) (ppm) <br /> Bonng MW-15 <br /> MW-15-21 08/18/99 21 ND- ND ' ND ND ' ND ND <br /> MW-15-26 08/18/99 26 ND- ND ND- ND ND ND <br /> MW-15-31 08/18/99 31 ND- ND ND ND" ND - ND <br /> MW-15-36 08/18/99 36 ND ND ND ND ND ND <br /> MW-15-39 08/18/99 39 ND ND ND ND ND ND <br /> Stockpile_Samples <br /> ^SP-l* 08/18/99 ---- 36 91 , 0 0738 - 0 546 0 320 248 ND ' <br /> Explanation_ Analytical Laboratory <br /> TPHg=Total Petroleum Hydrocarbons as gasoline Sequoia Analytical(FLAP 41624) <br /> BTEX=benzene,toluene, ethyl benzene,total xylenes <br /> MtBE=methyl tertiary-butyl ether Analytical Methods <br /> feet bgs=feet below ground surface TPHg/BTEX/MtBE DHS LUFI'Methodology <br /> . (ppm)=parts per nnllion <br /> ----=not applicable <br /> ND =analytes not present above the stated limit of detection <br /> Note See certified analytical results for detection limits <br /> = Sample analyzed for Total Lead by EPA 6000/7000 Series Methods Results were ND <br /> 1 Laboratory report indicated weathered gasoline C6-C12 <br /> Z Laboratory report indicated unidentified hydrocarbons C7-C12 <br /> 3 Laboratory report indicated unidentified hydrocarbons C6-C12 <br /> 4 Laboratory report indicated weathered gasoline C7-C12 <br /> 5 Laboratory report indicated gasoline C6-C12 <br /> 140124 05 Page 2 of 2 <br />