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Table 1 Groundwater Elevation and Analytical Data(CHEVRON) Chevron Service Station 4 94275 2905 W ask Benjamin Holt Drive Stockton.California Well Groundwater Depth Ethyl- Total Well Date Elevation Elevation to Water TPHg Benzene Toluene benzene Xylenes MtBE ID Sampled Notes (H,MSL) (h MSL) ((L TOC) NO) (ug/1) (u94) (ug/!) NO) (ug/0 MW-3 06107/02 -7.12 9.52 <50. <1. <1. 0, <1. 1,200 (cont.) 09124/02 -9.21 11.61 <50. <0.5 <0.5 <0.5 -0.5 450 12/17/02 -8.33 10.73 <50. -0.5 <0.5 <0.5 <0.5 430 03/18/03 -7.33 9.73 <50 <0.5 -0.5 <0.5 <0.5 2,200 06117/03 -7.56 9.96 <50 -0.5 <0.5 <0.5 <0.5 170 09/24103 -9.30 11.70 <50 <0.5 <0.5 <0.5 <0.5 22 12N8103 -8.95 11.35 <50 <0,5 -0.5 <0.5 <0.5 480 03123104 -6.74 9.14 <50 <1 <1 <1 <1 1,600 06122104 -6.63 11.03 <50 -0.5 -0.5 <0.5 <0.5 1,600 09/21/04 -9.79 12.19 -50 <0.5 -0.5 <0.5 <0.5 630 12/28/04 -8.34 10.74 <50 <0.5 <0.5 <0.5 -0.5 19 03107105 -5.73 8.13 -50 <3 <3 <3 <3 1,400 MW-4 03122/89 2.61 -13.48 16.29 NO NO ND ND NO -- 06112/89 -14.16 16.97 NO ND NO NO NO •- 09107/89 -15.54 18.35 170 1.7 NO NO NO -- 12118/89 -14.99 17.80 ND NO NO ND NO -- 03/20190 -14.59 17.40 85 2.9 NO NO 0.9 -- 07/03190 -15.24 18.05 93 NO NO NO ND - 10/19190 -16.77 1958 73 NO 2.6 1.5 ND - 01117191 -1638 19.19 150 ND NO ND NO -- 03/19191 -- - 100 NO ND NO NO -- 07718191 -16.24 19.05 81 NO NO NO ND -- 10131191 -16.71 19.52 160 ND NO NO NO -- 01/16/92 -16.01 16.82 NO NO ND 0.5 2.0 03111/92 -15.09 17.90 -- -- •• - -- _ . 03117/92 -14.97 17.78 150 2.9 9.7 3.0 9.7 = 06129192 -16.59 19.40 130 2.9 0.6 0.9 1.1 12110/92 -17.22 20.03 NO ND NO ND NO -- 02104/93 -15.54 18.35 64 ND NO NO ND -- 05118/93 -13.23 16.04 ND ND ND ND ND •• 08/05193 -14.02 16.83 ND AFD ND ND NO - 11/09193 -14.71 17.52 NO ND NO ND ND - 01/18194 -14.12 16.93 ND ND NO ND NO - 06/27194 -13.63 16.44 NO ND ND ND NO -- 09129194 -14.83 17.84 ND NO NO NO NO -- 12/08/94 -14.55 17.36 <50 <0.5 -0.5 <0.5 <0.5 -- 03198l95 -12.68 15.49 <50 <0.5 <0.5 <0.5 <0.5 -- 06101/95 -10.60 13.61 <50 <0.5 -0.5 <0.5 1.3 -- 09111/95 -12.52 15.33 <50 <0.5 <0.5 <0.5 <0.5 12105/95 -10.77 13.58 <50 <0.5 <0.5 <0.5 <0.5 - 03118/96 -9.67 12.48 <50 <0.5 <0.5 <0.5 <0.5 - 06118196 -9.39 12.20 80 <0.5 <0.5 <0.5 <0.5 65 09124/96 -10.99 13.80 80 <0.5 <0.5 -0.5 0.8 52 12/04196 -10.91 13.72 -50 <0.5 -0.5 <0.5 -0.5 36 02/25/97 -6.72 9.53 110 0.5 <0.5 <0.5 <0.5 16 05/06197 -7.70 10.51 <50, <0.5 -0.5 <0.5 <0.5 3,600 09/29197 -10.41 13.22 <1000 <10 -10 <10 -10 2,100 11!25!97 •10.39 13.20 <50 <0.5 <0.5 <0.5 <0.5 48 03/26198 -3.97 6.78 65 1.9 <0.5 <0.5 <0.5 1,300 06124198 -5.82 6.63 <50 <0,5 <0.5 <0.5 <0.5 4,700 09/10/98 -7.79 10.60 -500 13 -5.0 <5.0 -5.0 6,600 12117/98 -7.75 10.56 -50 <0.5 <0,5 <0.5 -0.5 2,900 03110/99 -6.07 8.88 57 <0.5 <0.5 <0.5 <0,5 340 O6/22/99 -7.39 10.20 <5000 <50 <50 <50 -50 8,740 09/13/99 -9.06 11.89 <50 <0.5 <0.5 <0.5 <0.5 1,600 12116199 -9.00 11.81 <50 <0.5 -0.5 <0.5 -0.5 272 03!01100 -5.39 8.20 68.7 0.542 <0.5 <0.5 <0.5 108 66/13100 -6.49 9.30 -50.0 -0.500 <0.500 <0.500 -0.500 896 09/13100 -8.53 11.34 -50.0 <0.500 1.02 <0.500 0.767 619 12/14100 -8.08 10.89 -50.0 -0.500 -0.500 -0.500 -1.50 217 03/02101 (5) -6.69 9.50 <50 <0.50 -0.50 -0.50 <0.50 791960 03102/018 (K) -6.69 9.50 -50 -0.50 -0.50 -0.50 -0.50 90 05110/01 -5.92 6.73 120 -0.50 0.66 -0.50 0.63 180 08121/01 -8.70 11.51 51 <0.50 -0.50 -0.50 <0.50 110 1,lChevron1942751Pedo&c MomtoringlQ M R194275_OMR.xls 4 of 11