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TABLE 2 - GROUNDWATER CHEMICAL ANALYTICAL DATA <br /> Tosco (Former Unocal) Service Station #6981 <br /> 4707 Pacific Avenue <br /> Stockton, California <br /> Depth to Ethyl- Total <br /> Well No/ Sample Water GWE TPHg Benzene Toluene benzene Xylenes MtBE* TBA DIPE EtBE TAME Ethanol <br /> TOC Date (ft) (ft) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) <br /> MW-14 08/21/99 2858 -1699 ND ND ND ND- ND 1101110 ND ND ND ND ND, <br /> 1159 <br /> MW-15 08/21/99 2862 -1725 ND ND ND , ND NO ND12 0 ND ND ND . ND ' ND <br /> 1137 <br /> 1 <br /> MW-16 08/21/99 2845 -1666 1,900 27 - ND. 26 150 120169 ND ND ND ND , ND <br /> 1179 <br /> VW-7 08/21/99 2857 ---- 37,000 2,500 - 6,100 610' 7,000 ND/510 ND ND ND ND ND <br /> ExpIgnation. AnalYtical Laboratory <br /> TOC=top of casing Sequoia Analytical(ELAP#1624) <br /> TPHg=total petroleum hydrocarbons as gasoline <br /> BTEX=benzene,toluene, ethylbenzene,total xylenes Analytical Methods <br /> MtBE=methyl tertiary-butyl ether TPHg/BTEX/MtBE 8015W8020 <br /> TBA = tertiary-butyl alcohol Oxygenates EPA Method 8260 <br /> DIPE = di-isopropyl ether ' =EPA Method 8020/EPA Method 8260 <br /> EtBE = ethyl tentary-butyl ether <br /> TAME = tertiary-amyl methyl ether <br /> (ppb)=parts per billion <br /> ND=analytes not present above the stated limit of detection <br /> Note See certified analytical results for detection limits <br /> 140I25 05 Page 1 ofl <br />