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TABLE 2 - GROUNDWATER CHEMICAL ANALYTICAL DATA
<br />Chevron Station #9-3232
<br />8660 Lower Sacramento Road
<br />Stockton, California
<br />Trip Blank 11/4/98 --- ---- < 50 <0.50 <0.50 <0.50 <0.50 < 2.5
<br />Explanation-
<br />TOC =Top of casing elevation
<br />(ft) = feet
<br />DTW = Depth to Water
<br />GWE = Groundwater elevation
<br />msl = Measurement referenced relative to mean sea level
<br />TPHg = Total Petroleum Hydrocarbons as gasoline
<br />BTEX = benzene, toluene, ethylbenzene, total xylenes
<br />MTBE = Methyl tert-butyl ether
<br />ppb = parts per billion
<br />---- = not applicable
<br />Aijalytical T abnratoa
<br />Sequoia Analytical (FLAP #1210)
<br />Analytical Me ho k
<br />TPHg/BTEX/MTBE = EPA Method 8015 Mod/8020
<br />' 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 />'- 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 tert-butyl ether (<200 ppb), and tert amyl ether (<200 ppb).
<br />a 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 tort -butyl ether (<40 ppb), and tert-amyl methyl ether (<40 ppb)
<br />346463.01
<br />Ethyl-
<br />Total
<br />Well ID/
<br />Date
<br />DTNN'
<br />GWE
<br />TPHg
<br />Benzene
<br />Toluene
<br />benzene
<br />Xylenes
<br />MTBE
<br />TOC (ft)
<br />Collected
<br />(ft)
<br />(msl)
<br />(ppb)
<br />(ppb)
<br />(ppb)
<br />(ppb)
<br />(ppb)
<br />(ppb)
<br />MW -1/
<br />13.02
<br />11/4/98
<br />31.93
<br />-18.91
<br />1,100
<br />13
<br /><1.0
<br />43
<br /><1.0
<br />24/<2.0'
<br />MW -2/
<br />13.76
<br />11/4/98
<br />36.07
<br />-22.31
<br />120,000
<br />23,000
<br />18,000
<br />4,300
<br />15,000
<br />< 1,000/ < 200'
<br />MW -3/
<br />12.85
<br />11/4/98
<br />35.22
<br />-22.37
<br />18,000
<br />2,900
<br />720
<br />1,100
<br />2,500
<br />< 125/ < 40'
<br />Trip Blank 11/4/98 --- ---- < 50 <0.50 <0.50 <0.50 <0.50 < 2.5
<br />Explanation-
<br />TOC =Top of casing elevation
<br />(ft) = feet
<br />DTW = Depth to Water
<br />GWE = Groundwater elevation
<br />msl = Measurement referenced relative to mean sea level
<br />TPHg = Total Petroleum Hydrocarbons as gasoline
<br />BTEX = benzene, toluene, ethylbenzene, total xylenes
<br />MTBE = Methyl tert-butyl ether
<br />ppb = parts per billion
<br />---- = not applicable
<br />Aijalytical T abnratoa
<br />Sequoia Analytical (FLAP #1210)
<br />Analytical Me ho k
<br />TPHg/BTEX/MTBE = EPA Method 8015 Mod/8020
<br />' 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 />'- 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 tert-butyl ether (<200 ppb), and tert amyl ether (<200 ppb).
<br />a 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 tort -butyl ether (<40 ppb), and tert-amyl methyl ether (<40 ppb)
<br />346463.01
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