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TaCbie 3 . Groundwater Elevation and Analytical Data Tosco (Former BP) Station No. 11193 " 3202 W. Hammer Lane, Stockton, California Well Date of P/NP Well Depth to Groundwater Groundwater TPH-G TPH-D TPH B T E X MtBE VOCs[1) DO Number Sampling Elevation Water Elevation Elevation (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (uglL) (ug/L) M/L) (ppm) (Feet) (Feet) (Feet) Change (Feet) MW-4 1/19/1999 5.43 13.76 -8.33 -0.59 ND<50 --- --- ND<1.0 ND<1.0 ND<1.0 ND<1.0 2 --- (cont.) 10/14/1999 5.43 14.04 -8.61 -0.28 ND<50 ND<1,0 ND<1.0 ND<1.0 ND<1.0 4.0 1/20/2000 5.43 13.87 -8.44 0.17 ND<50 --- --- ND<0.5 ND<0.5 ND<0,5 ND<0.5 9.7 5/4/2000 5.43 11.28 -5.85 2.59 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 7.8 7/14/2000 5.43 12.47 -7.04 -1.19 ND<50 --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 3.7 10/27/2000 5.43 13.43 -8.00 -0.96 ND<50 --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 12 --- 1/19/2001 5.43 13.30 -7.87 0.13 ND<50 --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 19 --- 4/23/2001 5.43 12.78 -7.35 0.52 ND<50 --- --- ND<0,5 ND<0.5 ND<0.5 ND<1.5 21,5 --- 7/27/2001 5.43 13.48 -8.05 -0.70 54 --- --- ND<0.5 ND<0.5 ND<0.5 ND<1.5 24 11/1/2001 5.43 14.50 -9.07 -1.02 ND<50 --- --- ND<0.5 ND<0.5 ND<0.5 ND<1.5 28.9 --- 1/28/2002 5,43 13.15 -7.72 1.35 ND<50 --- ND<0.5 ND<0.5 ND<0.5 ND<1.0 20.9 --- --- 4/23/2002 5.43 12.98 -7.55 0.17 ND<50 --- ND<0.5 ND<0.5 ND<0.5 ND<1.o 19.9 --- 7/29/2002 P 5.43 14.05 -8.62 -1,07 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 35,1 ND[3] --- 9/11/2002 P 5.43 14.66 -9.23 -0.61 ND<50 ND<0.5 ND<0.5 ND<0.5 ND<0.5 28 4/7/2003 P 5.43 13.97 -8.54 0.69 ND<50 --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 14 6/27/2003 P 5.43 14.3 -8.87 -0.33 N113<50 --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 27 ... -_ MW-5 4/25/1994 4.38 17.40 -13.02 --- 170 --- --- 34 1 ND<0.5 8 11 --- 3.9 7/28/1994 4.38 17.86 -13.48 -0.46 1,000 --- --- 440 19 10 38 ND<5.0 --- 3.9 QC-1 7/28/1994 --- --- --- --- 1,200 --- --- 470 23 11 46 12/9/1994 4.38 18.34 -13.96 930 --- --- 260 5 31 21 --- 4.6 QC-1 12/9/1994 --- --- --- --- 1,000 --- --- 280 6 34 24 3/3/1995 4.38 16.99 -12.61 --- 1,200 --- --- 450 7 6 28 --- --- 5.4 1 4/12/1995 4.38 15.71 -11.33 1.28 ND<50 9 ND<0.50 3 2 _._ ___ 7.9 7/20/1995 4.38 16.00 -11.62 -0,29 4,100 --- 220 ND<5.0 28 ND<10 --- --- 6.7 11/2/1995 4.38 16.90 -12.52 -0.90 220 44 1 9 7 ND<5.0 --- 3.6 1/16/1996 4.38 16.27 -11.89 0.63 160 --- --- 47 3 13 11 ND<5.0 --- --- 4/22/1996 4.38 14.17 -9.79 2.10 100 --- --- 48 3 6 11 ND<10 7/12/1996 4.38 14.46 -10.08 -0.29 960 --- --- 320 4 78 42 31 2.9 11/14/1996 4.38 15.36 -10.98 -0.90 560 --- --- 180 ND<1.0 49 17 19 3.1 3/t 1/1997 4.38 12,42 -8.04 2.94 ND<50 --- --- 1 ND<1.0 ND<1.0 ND<1.0 ND<10 --- 37 5/22/1997 4.38 13.04 -8.66 -0.62 60 --- --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 --- 4.9 8/6/1997 4.38 13.90 -9.52 -0.86 --- 9/22/1997 4.38 13,99 -9.61 -0.09 ND<50 --- --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 7,0 QC-1 9/22/1997 --- --- --- --- ND<50 --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 1/7/1998 4.38 13,98 -9.60 --- ND<50 --- --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 --- 6,3 1:1ConocoPhillipslTosco Marketing1111931Tables111193 2QMR03.sds Page 5 of 11