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Table 2 Groundwater Elevation and Analytical Data(ARCO) ARCO Service Station#2133 2908 West Benjamin Holl Drive Stockton,California Well Depth Product Groundwater Groundwater Ethyl. Total Well Date Elevation to Water Thickness Elevation Elevation TPHg Benzene Toluene benzene xylenes MtI3E DO Number Sampled Motes Ift,MSL) (ft,TOC) (ft) (ft,MSL) Change(ft) (ugfl) WWI) (Ug/1) (uglq WWI) (ug1l) 1mg1L) MW-1 1111011993 1.29 15.69 - -14.40 - <50 <0.5 <0.5 <0.5 <0.5 - - 3121/1994 15.11 - -13.82 0.58 <10 <0.3 <0.3 <0.3 <0.5 - - 6127/1994 14.94 - -13.65 0.17 <10 <0.3 <0.3 <0.3 <0.5 -- - 9/2911994 16.06 - -14.77 -1.12 <50 <0.5 <0.5 <0.5 <0.5 - -- 1DW1994 15.63 - -14.34 0.43 <50 -0.5 -0.5 <0.5 <0.5 -- -- 3/8/1995 13.21 -- -11,92 2.42 <50 <0.5 <0.5 <0.5 <0.5 -- -- 61111995 11.72 -- -10.43 1.49 <50 <0.5 <0.5 <0.5 <0.5 - -- 9l1111995 13.94 -- -12.65 -2.22 830 82 100 9 110 -- 1215/1995 1416 - -12.97 -0.32 - - - - - •• - 3/1811996 8.93 - -7.64 5.33 720 12 53 24 160 - - 6/1811995 9.92 - -8.63 -0.99 -- - -- - - •- - 9/2511996 12.53 - -11.24 -2.61 1500 110 9.7 94 52 25 - 121411996 12.00 -- -10.71 0.53 -- - - - - -3/1911997 P 7.45 -6.16 4.55 •50 0.51 <0.5 -0.5 <05 -5 0.2 615!1997 P 9.13 -- -7.84 -1.68 -• -- - -- - - 0.2 811911997 NP 10.51 -- -9.22 -1.38 <50 •0.5 <0.5 <0.5 <0.5 <5 0.2 11!2511997 P Mall -9.52 -0.30 - - - -- - - - 311911998 P 4.60 - -3.31 6.21 •50 <0.5 <0.5 <0.5 <0.5 <5 2.8 6/2411998 6.56 -- •5.27 -1.96 - - - - - - -- 911011998 P 8.28 -- -6.99 -1.72 -50 -0.5 .0.5 •0.5 <0.5 <5 -- 12/1711998 8.38 -- -7.09 •0.10 - - -- - - - - 3110l1999 P 6.17 - -4.88 2.21 <50 <0.5 -0.5 <0.5 <0.5 <5 2.3 6122!1999 8.21 -- -6.92 •2.04 - -- - - - -• 3.9 9113/1999 P 9.63 -- -8.34 -1.42 <50 <0.5 -0.5 <0.5 <0.5 4,800 1.8 12115/1999 9.61 - -8.32 0.02 - - - -- -• - 2.7 3123!2009 P 5.13Y -3.84 4.48 <50 -0.5 .0.5 •0-5 <0.5 <2.5 6,0 8121/2000 7.35 x8.08 -2.22 DA 9113/2000 P 9.12 - -7.83 -1.77 <50 <0,5 <0.5 -0.5 •D.5 117 1.55 1211512000 8.56 - -7.27 0.56 - - -- - - -- 0.86 31212001 P 6.65 - -5.36 1.91 <50.0 <0.500 -0.500 •0.500 -0.500 <2.50 4.6 5110/2001 6,65 - -5.36 0.00 -- -- - - •- - 2.3 812212001 P 9.10 - -7.81 -2.45 <50 <0.50 <0.50 •0.50 -0.50 16 -- 1215/2001 6.58 -- -7.29 0.52 - -- - - _ -_ -- 31212002 P 6.80 -- -5.51 1.78 <50 <0.50 -0.50 <0.50 -0.50 <2.5 1.11 616!2002 7.70 -- -6.41 -0.90 -- - -- - - -- 0.14 972412002 P 9.45 -- -8.16 -1.75 <50 <0.50 <0.50 <0,50 <0.50 3.7 D,28 12117/2002 8.03 - -6.74 1.42 -- - - - - -- - 371812003 P 7.71 - -6.42 0.32 <50 <0.50 <0.50 -0.50 <0.50 <2.5 0.96 6/1712003 7.91 - -6.62 -0.20 - - - - - - 0.10 9!24103 a P 9.50 -- -8.21 -1.59 <50 <0.50 <0.50 -0.50 -0.50 -0.50 0.79 1271812003 9.08 - -7.79 0.42 - - -- - _- -_ - 311672004 P 6.72 - -5,43 2.36 -50 <0.50 <0.50 -0.50 <0.50 <0.50 -- 6122l2004 8.91 -- -7.62 -2.26 - - - -- - 9121!2004 9.94 - -8.65 -0.84 <50 <0.50 -0.50 <0.50 <D,50 1.3 -- 12/2812004 8.68 - -7.39 -0.10 - -- - - - - _ 31712005 5.78 -4.49 1.02 <50 <0.50 -0.50 -0.50 <0.50 <0.50 2.6 MW-2 11/1011993 2.88 16.89 -- -14.01 - 950 67 72 6.6 120 -- -- 3121/1994 16.44 - _ -13.56 0.45 450 100 6.2 16 83 - - M711994 16.29 - -13.41 0.15 390 55 13 9.6 72 - - 9129194 -- - -- - -- - -- -- - - - 12l8194 15.43 - -12.55 - 580 29 27 6.2 130 - 378795 2.54 12.97 - -10-09 2.46 3,800 160 42 89 370 - - 611195 -- -- - -- - - - -- - -- _ 9/11/1995 13.74 - -11.20 -- 4,100 290 51 140 170 1215/1995 1.15 14.10 -- -12.95 -1.75 - - - .. -- -- 311EV1996 6.60 -- -7.45 5.50 4,800 250 18 56 280 6!1811996 9.61 Y - -1. - - - -- - - 9l25l7996 12.20 -77.01.0 5 -2.55 9 120 2.7 <0.5 3 18 -5 1214/1996 11.78 -10.63 0.42 3!1911997 P 7.33 -- -6.18 4.45 510 17 0.89 3.1 4.4 -_ D.3 615/1997 P 8.83 - -7.68 -1.50 - - - -- - 0.4 I:IB P-ARCO121331Ta bleslgwtables2133.x la 21 Of 24