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t <br /> ry <br /> TABLE 2 - GROUNDWATER CHEMICAL ANALYTICAL DATA <br /> Chevron Station #9-3232 <br /> 8660 Lower Sacramento Road <br /> Stockton, California <br /> Ethyl- Total <br /> Well ID/ Date DTW GWE TPHg Benzene Toluene benzene Xylenes MTBE <br /> TOC (ft) Collected (ft) (msl) (ppb) ( b) (ppb) _(ppb) ( b) (ppb) <br /> MW-1/ <br /> 1302 11/4/98 31 93 -1891 1,100 13 <1 0 43 < 1 0 24/<2 0 <br /> MW-2/ <br /> 1376 11/4/98 3607 -2231 120,000 23,000 18,000 4,300 15,000 < 1,000/<2002 <br /> MW-3/ <br /> 1285 11/4/98 3522 -2237 18,000 2,900 720 1,100 2,500 <125/<403 <br /> Trip Blank 11/4/98 ---- ---- <50 <0 50 <0 50 <0 50 <0 50 <25 <br /> . Txnlanattan. <br /> TOC = Top of casing elevation Analytical Laboratory <br /> (ft) = feet Sequoia Analytical(ELAP#I210) <br /> DTW = Depth to Water <br /> GWE = Groundwater elevation Analytical Methods <br /> msl = Measurement referenced relative to mean sea level TPHgBTEX/MTBE = EPA Method 8015 Mod/8020 <br /> TPHg = Total Petroleum Hydrocarbons as gasoline <br /> BTEX = benzene, toluene, ethylbenzene, total xylenes <br /> MTBE = Mediyl tert-butyl ether <br /> ppb = part, per billion <br /> ---- = not applicable <br /> t MTBE result confirmed by EPA Method 8260 Sample also analyzed for the oxygenates ethanol (<500 ppb), <br /> tert-butanol (<100 ppb), di-isopropyl ether(<2 0 ppb), ethyl tert-butyl ether (<2 0 ppb), tert-amyl methyl ether (<2 0 ppb) <br /> 2 MTBE result confirmed by EPA Method 8260 Sample also analyzed for the oxygenates ethanol (<50,000 ppb), <br /> tert-butanol (<10,000 ppb), di-isopropyl ether(<200 ppb), ethyl tent-butyl ether (<200 ppb), and tert amyl ether (<200 ppb) <br /> 3 MTBE result confirmed by EPA Method 8260 Sample also analyzed for the oxygenates ethanon (< 10,000 ppb), <br /> tert-butanol (<2,000 ppb), di-isopropyl ether (<40 ppb), ethyl tert-butyl ether (<40 ppb), and tert-amyl methyl ether (<40 ppb) <br /> 346463 01 <br />