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Table 2:Historical Groundwater Gauging and Analytical Results
<br /> ARCO Service Station No.5469
<br /> a TOC Depth to Measured CaIG.
<br /> Well No. pate o Elevation water SPH GW GRD B T E X MTBE TBA DIPE ETSE TAME Ethanol 1,2-OCA EDB D.O. Comments
<br /> * (ft-MSL) (feet) Thickness Elev. (Vg/L) (Vg/L) (Vg1L) (Vg1L) (pg/IQ (Vg/L) IV91L) (Vg/L) (pglL) (V911-) {V91L) (Vg1L) (Vg1L) (mg1L)
<br /> (feet) (ft-MSL)
<br /> MW-7 06/25/07 16.49 37.49 0.00 -21.00 <50 <0.50 <0.50 <0,50 <O.50 <0.50 <20 <0.50 <0.50 <0.50 <300 <0.50 0.50 6.7
<br /> 09/12/07 16.49 37.98 0.00 -21.49 <60 <0.50 <0.50 <0.50 <0.50 <0.50 <20 <0.50 <0.60 .40.50 <300 0.50 <0.50 5.9
<br /> 12119/07 16.49 38.35 0.00 -21.86 <50 <0.50 <0.50 <0.50 <0.50 .40.50 <20 <0.50 <0.50 eO.50 <300 <0.50 <0.50 1.8
<br /> 03/17/08 16.49 37.19 0.00 -20.70 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <10 <0,50 .40,50 <0.50 <300 <0.50 <0.50 8.24
<br /> 06118/08 16.49 37.07 0.00 -20.58 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <300 <0.50 <0.50 1.65
<br /> 09104/08 16.49 37.96 0.00 -21.47 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <300 <0.50 <0.50 1.35
<br /> 11118/08 NS 16.49 38.17 0.00 -21.68 - - - -
<br /> 12109/08 16.49 39.13 0.00 -22,64 <50 40.50 <0.50 .40,50 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <3DO <0.50 0.50 6.34
<br /> 02104/09 16.49 38.80 0.00 -22.31 <50 <0.50 <0.50 <0.50 <0.5D <0.50 <10 <0.50 <0.50 <0.50 <300 0.50 <0.50 7.11
<br /> 05111/09 16.49 38.36 0.00 -21.87 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <300 .40.50 <0.50 2.50
<br /> 1213/2009 16.49 40.23 0.00 -23.74 <50 <0.50 <0.50 0.50 <0.50 <0.50 <10 <0.50 <0.50 <0.50 <300 <0.50 <0.50 5.41
<br /> 6/2/2010 SA 16.49 - - - - - - - - - - - -
<br /> 11108/10 16.49 38.70 0.00 -22.21 <50 <0.50 <0.50 <0.50 <0.50 <0.50 <10 <0.50 5.98
<br /> 06114/11 NS 16.49 36.10 0.00 -19.61 - - - - - - - - 4.28
<br /> MW-8 06125/01 NS 16.46 38.10 0.00 -21.64 - - - - - - - - -
<br /> 06/28/01 16.46 38.23 0.00 -21.77 <5,000 2,300 <50 <50 <50 1,600 <5,000 <50 <50 <5D <75,OW <50 <50
<br /> 09/14/01 16.46 39.63 0.00 -23.17 <2,000 980 <20 <20 <20 7,500 <20,000 <200 .4200 <200 <200 <200
<br /> 12/14/01 16.46 40.72 0.00 -24.26 29,000 N 18,000 640 120 470 17,000 <500 <50 <50 <50 450 <50 Past holding time
<br /> 02121/02 16.46 40.39 0.00 -23.93 30,000 15,000 <200 <200 <20D 22,000 0,000 <100 <100 <100 <100 000
<br /> 04123/02 16.46 40.48 0.00 -24,02 27,000 N 16,000 <200 <200 <200 26,000 <5,000 <500 <500 <500 <500 <500
<br /> 09/19/02 16.48 42.47 0.00 -26.01 460 190 <0.50 <0.50 <0.50 16,000 <500 <50 <50 <50 <5,DDO <50 <50
<br /> 12111/02 16.46 43.30 0.00 -26.84 29,000 N 9,600 <250 <250 <25D 24,000 <10,DDO <260 <250 .4250 <260 <250
<br /> 01/14103 NP 16.46 - - 26,000 N 6,200 <50 450 <50 18,000 <10,000 <250 <250 <250
<br /> 02112/03 NP 16.46 - - - 27,000 5,200 <250 <250 <250 21,000 00,000 <250 <250 X250 <20,000 - -
<br /> 02/26/03 16.46 43.11 0.00 -26.65 <50,000 5,000 <500 <500 <WO 19,000 <20.000 <500 <500 <500 <40,000 <600 <500
<br /> 05/19/03 16.46 42.20 0.00 -25.74 29,000 6,000 <50 <50 450 33,000 <4,000 <200 <200 <200 <20,000 <100 <100
<br /> 09/09/03 16.46 43.67 0.00 -27.21 7,200R 980 <1.0 41.0 <1.0 23,000 <40,000 <2,000<2,000<2,000<200,000 <1,000 0,000
<br /> 12110/03 16.46 44.31 0.00 -27.85 18,000 3,000 <250 <250 <250 28,000 <10,000 <500 <500 <500 <50.000 <250 <250
<br /> 03/041D4 16.46 43.69 D.00 -27.23 15,000 3,100 <500 <500 <500 31,000 <20,000 <1,000 41,000<1,000<100,000 <500 X500
<br /> 06/48/04 16.46 43.23 0.00 -26.77 180 990 <10 <10 <10 32,000 <400 <20 <20 <20 <2,000 34 <10
<br /> 09114/04 16.46 44.90 0.00 -28.44 25,000 420 <250 <250 <250 20,000 <10,000 <250 <250 <250 <50,000 <25D <250 0.6
<br /> 12/09/04 16.46 45.77 0.00 -29.31 13,000 1,400 <500 <500 <500 23,000 <20,000 <1,000<1,OD0<1,000<100,000 <500 <500 2.7
<br /> 03116/05 16.46 44.67 0.00 -28.21 27,000 600 <100 4100 <100 23,000 A,000 000 <100 <100 <20,000 000 <100 0.8
<br /> 06/48/05 16.46 42.95 0.00 -26.49 <25.000 <250 <250 <260 <260 18,000 <10,000 <250 <250 <250 <50,000 <250 <250 1.8
<br /> 09148!05 16.46 43.3 0.00 -26.84 6,900 <50 <50 <50 <50 9,500 <2,ODO <50 <50 <50 <10,000 <50 <50 1.9
<br /> 12108/05 16.46 43.84 0.00 -27.38 <5,000 <60 <50 <50 <50 4,100 <2,000 <50 <50 <50 <10,D00 <50 <50 1.9
<br /> 02!27106 INA 16.46 42.39 0.00 -25.93 - - - - - - - - - -
<br /> 03106/O6 16.46 42.29 0.00 -25.83 <5,000 <50 <50 <50 <50 4,800 <2,000 <50 <50 <SO <30,000 <50 <50 1.8
<br /> 0550/06 16.46 39.52 0.00 -23.06 3,500 <25 <25 <25 <25 4,000 <1,000 <25 <25 <25 <15.000 <25 <25 0.7
<br /> 09106/06 16.46 38.40 0.00 -21.94 64 <0.50 <0.50 <0.50 <0.50 100 <21) <0.50 <0.50 40.50 <300 <0.50 <0.50 2.3
<br /> 12126/06 16.46 38.47 0.00 -22.01 360 40.50 <0.50 <0.50 <0.50 1,300 28 <0.50 <0.50 <0.50 <300 <0.50 <0.50 1.7
<br /> 02126/07 16.46 38.98 0.00 -22.52 1,300 <5.0 <5.0 <5.0 <5.0 1,800 <200 45.0 <5.0 <5.0 <3,OD0 <5.0 <5.0 7.2
<br /> 06125/07 16.46 37.43 0.00 -20.97 - - - - - - - -
<br /> 08125/07 16.46 37.54 0.DO -21.08 610 <5.0 <5.0 <5.0 <5.0 820 <200 <5.0 <5.0 <5.0 <3,000 <5.0 <5.0 3.5
<br /> 49!12!07 16.46 37.98 0.00 -21.52 <50 <0.50 <0.50 <0.50 <0.50 50 <20 <0.50 <0.50 <0.50 <300 <0.50 <0.50 3.3
<br /> 12/19/07 16.46 38.41 0.DO -21.95 610 N <0.50 <0.50 <0.50 <0.50 1,100 21 <0.50 <0.50 <O.50 <300 0.70 <0.50 2.65
<br /> 03117/08 16.46 37.26 0.00 -20.8 <50 <0.50 <0.50 <0.50 <0.50 fib <10 <0.50 <0.50 <0.50 <300 <0.50 <0.50 4.29 Dry at 27 gallons
<br /> 06/18108 16.46 37.06 0.00 -20.60 62 <2.5 42,5 <2.5 42.5 350 <50 425 42.5 42.5 <1,500 <2.5 <2.5 0.58
<br /> D9104108 16.46 38.04 0.00 -21.58 <60 <2.5 <2.5 <2.5 <2.5 130 <50 <2.5 <2.5 <2.5 <1,500 <2.5 <2.5 0.91
<br /> 11/18/08 NS 16.46 37.91 0.00 -21.45 - - - - - - - - - - - - - -
<br /> 17/09/08 16.46 39.16 0.00 -22.70 <50 <2.5 <2.5 <2.5 <2.5 60 <50 <26 <2.5 <2.5 <1500 <2.5 <2.5 1.91
<br /> OVUM 16.46 38.88 0.00 -22.42 73 <2.0 <2.0 <2.0 <2.0 240 W0 <2.0 <2.0 <2.0 <1,200 <2.0 <2.0 1.14
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