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Table 2 <br /> Historical Groundwater Monitoring and Analytical Data <br /> 7-Eleven Store#14117 <br /> 2725 Country Club Boulevard <br /> Stockton,CA <br /> Well IDI Ethyl- MtBE 1,2- Meth- Eth. Ace- Dissolved <br /> Elevation Date Benzene Toluene Benzene Xylene TPHg 8020 MtBE TBA DIPE EtBE TAME DCA EDB enol anol tone Notes Oxygen DTW SPT WTE <br /> OC /L IL L IL /L /L L IL /L /L /L L /L /L /L !L m L feet (feet) feet <br /> MW-4 <br /> i <br /> 0.92 08/28/99 340 <10 750 150 4,200 -- 510 <400 <100 <100 <100 - - -- 0.7 9.20 0.00 -8.28 <br /> 11/24/99 485 13.4 553 169 6,740 1,240 969 <100 <25 <25 <25 - 1.3 9.95 0.00 -9.03 <br /> 02/02/00 446 <3 1,150 664 2,150 1,220 1,490 <100 <25 <25 <25 -- - -- - 1.3 9.96 0.00 -9.04 <br /> 05/16/00 190 <12 250 130 9,600 -- <br /> 1,700 <1,200 <50 <50 <50 -- - - -- 0.4 7.17 0.00 x.25 <br /> 08/08/00 980 <25 380 550 7,400 1,200 <1,200 <50 <50 <50 -- - 0.3 8.55 0.00 -7.63 <br /> 11/15/00 200 <10 400 300 4,700 1,100 650 <25 <25 <25 -- -- 0.5 8.72 0.00 -7.80 <br /> 02/07/01 200 <25 580 440 7,900 - 810 <620 <25 <25 <25 - - -- a 0.8 7.67 0.00 -6.75 <br /> 05/23/01 89 <5 340 260 3,500 -- 810 <620 <25 <25 <25 - -- -- 1.0 7.60 0.00 -6.68 <br /> 09/25/01 650 <10 190 140 4,500 -- 1,300 <500 <120 <120 <120 - -- -- -- 0.6 9.72 0.00 -8.80 <br /> 11/05/01 92 3.3 220 120 3,600 -- 1,100 230 <50 <50 <50 <50 <50 - -- 0.8 9.49 0.00 -8.57 <br /> 01/08/02 141 22 439 336 4,000 -- 1,890 1,010 <5 <5 <5 -- -- 0.7 6.45 0.00 -5.53 <br /> 04/12/02 170 9.9 330 220 4,400 870 910 1,800 <12 <12 <12 -- 0.7 7.11 0.00 -6.19 <br /> 07/09/02 1,600 20 160 110 6,900 900 1,300 1,900 <25 <25 <25 - -- -- 0.8 7.47 0.00 -6.55 <br /> 10/16/02 12 5.5 25 7.3 770 180 210 1,300 <5 <5 <5 -- -- -- -- 0.9 8.80 0.00 -7.88 <br /> 03/17/03 37 2.7 73 57 2,300 200 1,300 <0.50 <0.50 <0.50 - - - -- 1.4 7.75 0.00 -6.83 <br /> I <br /> 05/29/03 56 6.0 170 120 4,100 - 170 1,800 <0.50 <0.50 <0.50 - b 0.2 8.11 0.00 -7.19 <br /> i <br /> 0.88 09/18/03 16 0.76 31 11 1,400 96 780 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <5.0 <8.0 c 1.1 9.30 0.00 -8.42 <br /> 12/02/03 8.4 <0.50 8.8 3.4 1,300 70 730 <0.50 <0.50 <0.50 <0.50 <0.50 <50 <5.0 - 0.1 8.71 0.00 -7.83 j <br /> 03/03/04 5.7 0.80 17 8.2 1,000 63 550 <0.50 <0.50 <0.50 <0.50 <0.50 -- d 0.2 6.39 0.00 -5.51 <br /> li <br /> I:\7-Eleven\7-11 Stores\14117\Tables\14117 04-1Q.xlsHistorical Water Page 4 of 6 <br />