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Table 2 Groundwater Elevation and Analytical Data(ARCO) ARCO Service Station#2133 2908 Benjamin Holt Drivedve Stockton,California Well Depth Product Groundwater Groundwater Ethyl- Xylenes Well Date Elevation to Water Thickness Elevation Elevation TPI-Ig Benzene Toluene benzene (total) MtBE DO Number Sampled (1t,MSL) (ft.TOC) (ft) (ft,MSL) Change(R) NO) (ugn) (ugn) (ug") (ugll) (ugn) (mg/!-) 12!511995 1.41 14.55 - -13.14 -2.05 - - - - - _ _ E-8 3116/1996 9.38 - -7.97 5.17 1,200 14 <5 24 27 - - (conL) 6/16/1996 9.90 - -8.49 -0.52 » - -- - - - _ 9125/1996 12,62 - -11,21 -2.72 3,700 42 <5 120 99 <50 - 12/411996 1204, - -10,63 0.58 -- - -- - - _ 3/1911997 NP 7.56 -- -6.15 4,48 <50 <D.5 <0.5 <0.5 <0.5 -- 0.2 61511997 P 9.19 -- -7,76 -1.63 -- - - - - - 0.3 811911997 NP 10.57 -- -9.16 -1.38 200 2.4 0.91 2.7 2.6 24 0.3 11/25/1997 P 10.83 -- -9.42 -0.26 -- - - - - _ - 3/1911998 NP 5.37 - -3.96 5.46 <50 <O.5 <0.5 <0.5 <0.5 13 2.3 612411998 6.62 - -5.21 -1.25 -- - - - - _ _ 911011998 NP 8.41 - -7,00 -1.79 <50 107 0.742 <0.5 1.21 <5.0 -- 1211711998 8.35 - -6.04 0.06 -- - - - - - .. 311 011 99 9 NP 6.26 -4.S5 2.09 <50 <0.5 <0.5 <0.5 <0.5 <5.0 6.8 6122/1999 8.30 -6.69 -2.04 - -- -- - _ _ 2.4 911371999 NP 10.01 -8.60 -1.71 <50 0.637 <0.5 <0.5 0.923 <5.0 1.8 1211511999 9.85 -8.44 0.16 - - -- - - - 6.8 3/23/200D P 5.21 - -3.80 4.64 107 <0.5 <0.5 <0,5 <0.5 <2.50 5.5 6/21/200D 7.53 - -6.12 -2.32 - - - - -- _ 0.8 9113/200D NP 9.26 - -7,65 -1.73 <50 <0.5 <0.5 <05 <0.5 <2.50 1.26 12115/2000 8.70 - -7.29 0.56 - - - - - - 2.63 3!112001 P 6.79 - -5.38 1.91 <50.0 <0.500 <0.500 <0.500 0.600 6.31 3.7 5/1012001 8.80 - -5.39 -0.01 -- - - - - - 3.0 812212001 P 9.52 - -6.11 -2.72 99 0.68 0.60 <0.50 <0.50 3:8 - 121512001 855 -7,14 0.97 311 112 0 02 P 6.89 -5.48 1.66 <500 <5.D <5.0 <5.0 <50 270 1.63 616!2002 7.76 - -6.35 -0.87 - - - - _ _ 0.64 9124/2002 P 9.65 -- -8.24 -1.89 <50 <0.50 <0.50 <0.50 <0.50 43 0.29 12/17/2002 7.83 -- -6.42 1,82 - - - - _ _ 311 812 0 03 P 7.88 -- -6.45 -0.03 <56 <0.50 <0.50 <0.50 <0.50 <2.5 1.08 611712003 8.02 - -6.61 -0.16 - - - -- -- - 0.20 9124103 a P 9.86 - -8.45 -1.84 <50 0.56 <0.50 <0.50 0.52 15 0.45 12116/2003 9.16 - -7.75 0.70 -- - - .- .- _ _ 3117!2004 P 7.03 - -5.62 2.13 63,00 <0.50 <0.50 <0.50 <0.50 6-10 - 612212004 9.04 - -7.63 -2.01 -- - _ _- - _ _ 912112004 10.13 -8.72 -1,09 <50 0.6 x0.50 <0.50 <0.50 3.4 - E-7 812611988 1.16 - - .- _ - 1112811988 2/27/1989 - - - -- - 36.6 <0,5 <0.5 O.7 -- - W3071989 - -- _ _ _ - 8/22/1989 - -- - - - 1.5 0,5 <0.5 <0.5 - - 121471989 - -- - _ _ „ 11411990 - 2!111990 211571990 2/2211990 - - -- _ _ _ 3/811990 15.70 - -14,54 » - 13.7 1.5 0.8 1.4 47511990 15.88 - -14,72 -0.18 -- - - - _ 411911990 16.00 - -14,84 -0.12 511011990 16.30 - -15.14 -0.30 5/2411990 16,28 » -15.12 0,02 6/5/1990 - - _ _ 6/1811990 dry - - 7112/1990 17.03 -- -15.87 8/1611990 17,12 - •15.96 -0.09 9/1711990 17.72 - -16.56 -0,60 9/181199017.72 -16.56 0.00 1,100 100 12 4.5 28 1011111990 17.76 - -16.60 -0.04 - - -- _ _ 121611990 - - - - - _ - 2/1211991 17.28 - -16.12 - 840 33 8 T2 21 I:1ProjectslARC012133i7ab lestgwtables 2133,As 7024