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Tab.e 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) (ug/L) (ug/L) (ug/L) (ppm) (Feet) (Feet) (Feet) Change (Feet) MW-6 9/18/1998 3.56 11.31 -7.75 -1.72 50 --- --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 74 --- 5.7 (cont.) 1/19/1999 3.56 11.81 -8.25 -0.50 ND<50 --- --- ND<1.0 ND<11.0 ND<1.0 ND<1.0 45 --- 10/14/1999 3.56 13.32 -9.76 -1.51 ND<50 --- --- ND<1.0 ND<1.0 ND<1.0 ND<1.0 29 1/20/2000 3.56 12.77 -9.21 0.55 ND<50 --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 33 5/4/2000 3.56 9.48 -5.92 3.29 140 --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 710 7/14/2000 3.56 11.97 -8.41 -2.49 ND<50 --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 110 10/27/2000 3.56 --- --- --- --- _._ --- --- --- --- 1/19/2001 3.56 --- --- --- --- --- --- ___ - 4/23/2001 3,56 --- --- --- --- .-_ 7/27/2001 3.56 --- --- _.. --- --- ... --- -- --- --- --- 8/6/2001 3.56 11.82 -8.26 --- 120 --- --- ND<0.5 ND<0.5 ND<0.5 ND<1.5 123 11/1/2001 3.56 12.79 -9.23 -0.97 320 --- --- ND<0.5 ND<0.5 ND<0.5 ND<1.5 389 --- 1/28/2002 3.56 11.37 -7.81 1.42 210 --- --- ND<0.5 ND<0.5 ND<0.5 ND<1.0 256 --- 4/23/2002 3.56 11.25 -7.69 0.12 510 --- --- ND<0.5 ND<0.5 ND<0.5 ND<1.0 412 --- --- 8/8/2002 P 3.56 12.50 -8.94 -1.25 ND<50 --- --- ND<2.5 ND<2.5 ND<2.5 ND<7.5 848 9/11/2002 P 3.56 12.96 -9.40 -0.46 200 --- --- ND<100 ND<100 ND<100 ND<100 780 --- 4/7/2003 P 3.56 12.26 -8.70 0.70 280(6] --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 250 --- --- 6/2712003 P 3.56 12.58 -9.02 -0.32 170[6] --- --- ND<0.5 ND<0.5 ND<0.5 ND<0.5 200 -- _- MW-7 4/25/1994 4.46 17.59 -13.13 76 --- --- 1 ND<0.5 ND<0.5 2 26 --- 4.7 7/28/1994 4.46 18.06 -13.60 -0.47 67 --- --- 7 ND<0.5 ND<0.5 ND<0.5 ND<5.0 --- 4.6 12/9/1994 4.46 18.78 -14.32 -0.72 57 --- --- 5 1 ND<0.5 ND<1 ... --- 4.7 3/3/1995 4.46 17.40 -12.94 1.38 ND<50 --- --- 6 ND<0,50 ND<0.50 ND<1.0 --- ... 4.3 4/12/1995 4.46 16.29 -11.83 1.11 ND<50 --- --- 5 ND<0.50 ND<0.50 ND<1.o --- --_ 7.8 7/20/1995 4.46 16.26 -11.80 0.03 ND<50 --- --- 3 ND<0.50 ND<0.50 ND<1.0 --- --- 5.3 11/2/1995 4.46 17.10 -12.64 -0.84 ND<50 --- --- 3 ND<0.5 ND<0.5 ND<1.0 ND<5.0 4.2 1/16/1996 4.46 16.44 -11.98 0.66 ND<50 --- --- 5 ND<0.50 ND<0.50 ND<1.0 ND<5.o --- --- 4/22/1996 4.46 14.27 -9.81 2.17 ND<50 --- --- 2 ND<1 ND<1 ND<1 ND<10 --- _._ 7/12/1996 4.46 14.67 -10.21 -0.40 ND<50 --- --- ND<0.5 ND<1 ND<1 ND<1 ND<10 --- 1.7 11/14/1996 4,46 15.60 -11.14 -0.93 ND<50 --- --- ND<0.5 ND<1.0 ND<1.o ND<1.0 ND<10 --- 3.2 3/11/1997 4.46 12.55 -8.09 3.05 --- --- --- --- 5/22/1997 4.46 13.19 -8.73 -0.64 --- --- --- --- --- ___ 8/6/1997 4.46 13.99 -9.53 -0.80 --- --- --- ___ 9/22/1997 4.46 14.06 -9.60 -0.07 ... --- --- -- --- --- 1/7/1998 4.46 14.20 -9,74 -0.14 ND<50 --- ND<0.5 ND<1.0 ND<1.0 ND<1.0 ND<10 --- B.3 7/1/1998 4.46 10.63 -6.17 3.57 --- --- --- -__ _._ lAConocoPhillipslTosco Marketing1111931Tables111193 20MR03.xls Page 7 of 11