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. Table 3 Analytical Results for ARCO Facility 2133,Stockton,California Monitoring well Water-level number and Concentrations mggfL elevation, date sampled Benzene Toluene Eth lbenzene Xylenes TPH-G (a) in feet(b) 6/27194 55 13 9 6 72 390 -1341 9/29/94(g) -- -- -- -- -- -- 12/8/94 29 27 6 2 130 580 -1255 3/8/95 180 42 89 370 3800 -- 6/1/95 (i) -- -- -- -- --9/11/95 290 51 140 170 4100 -- 12/5/95 (h) -- -- -- -- -- -1295 3/19/96 250 18 56 280 4800 -7.45 MW-3 3/8/95 <0 5 <0 5 <0 5 <0 5 <50 -1187 6/1/95 <0 5 <0 5 <0 5 <0 5 <50 -1024 9/11/95 <0 5 <0 5 <0 5 <0 5 <50 -1253 12/5/95(h) -- -- -- -- -- -1289 3/18/96 <0.5 <0.5 <0 5 <0 5 <50 -8.44 MW-4 3/8/95 <0 5 <0 5 <0 5 <0 5 <50 -1177 • 6/2/95 <0 5 <0 5 <0 5 <0 5 <50 -1032 9/11/95 <0 5 <0 5 <0 5 <0 5 <50 -1250 12/5/95 <0 5 <0 5 <0 5 <05 <50 -1292 3/18/96 <0 5 <0 5 <0 5 <0 5 58 -7 71 MW-5 3/8/95 43 4 7 3 3 60 1800 -11 87 6/2/95 55 2 7 2 3 75 1300 -1036 9/11/95 87 3 9 1 29 1500 -1261 12/5/95 120 <10(c) 16 11 2200 -1299 3/18196 190 19 24 800 8200 -9.78 (a)TPH-G—Total petroleum hydrocarbons as gasoline (b)Unknown hydrocarbon-most likely weathered gasoline (c)Raised reporting limit due to high analyte concentration requiring sample dilution (d)Xylenes were incorrectly reported in the second quarter 1994 quarterly report data shown herein is correct (e)Sample not collected because well was covered by soil pile (t)Raised reporting limit due to matrix interference (g) Sample not collected because well was dry (h)Well on a semi-annual sampling schedule Sampled during the first and third quarters of each year (i)Sample not collected because well connected to SVF/AS system,was under a vacuum and inaccessible • {l}Sample not collected because well contained free product Note Dash indicates not measured or not analyzed 3316\TABLES\2133MAR6 XLS