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TC2 ' Historical Groundwater Monitoring and Analytical Data 7-Eleven Store#20632 4627 Da Vinci Drive Stockton,CA ,Well IDI Ethyl ". MEBE.�= Dissolved Elevation Date Benzene Toluene Benzene Xylene TPHg 8020 MtBE TBA DIPS EtBE TAMB Notes Oxygen DTW. SPT WTE TOC (µg1L) tN9/L) (µgfL) (µg1L) (µg!1-) (µg/L) (PgIL)' (t'g!E) (Pg1L). (Pg/L) (NgfL-)" (mgIQ (feet) '(feet) (feet) MW-5 2.57 02/17/99 85 <1 30 110 890 49 fit <20 <5 <5 <5 0.7 5.79 0.00 -3.22 05/21/99 24.2 0.86 14.1 17.2 220 -- 188 <20 <5 <5 <5 0.9 7.00 0.00 -4.43 08/28/99 36.6 <0.3 32.1 3.48 296 -- 64 <20 <5 <5 <5 0.8 6.70 0.00 -4.13 11/24/99 21.4 1.29 14.2 1.49 257 25.9 28 <20 <5 <5 <5 1.1 7.50 0.00 -4.93 02/02/00 29.6 <0.3 26.5 0.63 284 35.3 75 <20 <5 <5 <5 1.1 6.50 0.00 -3.93 05/16/00 <0.5 <0.5 0.99 <1 <100 -- 160 <100 <4 <4 <4 0.6 6.37 0.00 -3.80 08/08/00 2.8 <0.5 4.4 2.2 <100 -- 160 <120 <5 <5 <5 0.4 7.35 0.00 -4.78 11/15/00 2.9 <0.5 3.6 2.8 170 -- 59 <50 <2 <2 <2 0.6 6.75 0.00 -4.18 02/07/01 <0.5 <0.5 0.72 <1.5 <100 -- 24 <50 <2 <2 <2 a 0.7 6.60 0.00 -4.03 05/23/01 1.2 <0.5 <0.5 <1 <100 -- 86 <50 <2 <2 <2 2.0 6.93 0.00 -4.36 08/21/01 <0.5 <0.5 0.67 1 <100 -- 26 <50 <2 <2 <2 0.1 7.57 0.00 -5.00 11/05/01 2.2 <0.5 <0.5 1.2 130 -- 76 <20 <5 <5 <5 1.0 7.40 0.00 -4.83 01/09/02 <5 <5 <5 <5 <50 -- 52 <20 <5 <5 <5 0.9 5.00 0.00 -2.43 04/10/02 20 <0.5 <0.5 <0.5 92 85 80 <25 <2.5 <2-5 <2.5 1.2 6.96 0.00 -4.39 07/10/02 0.86 <0.5 <0.5 0.73 <50 77 72 <17 <1.7 <1.7 <1.7 1.1 7.40 0.00 -4.83 10/16/02 11 1.8 2.3 13 220 85 75 <25 <2.5 <2.5 <2.5 1.0 7.60 0.00 -5.03 03/26/03 <0.50 1.0 <0.50 <0.50 <50 -- 20 <5.0 <0.50 <0.50 <0.50 0.7 6.84 0.00 -4.27 05/20/03 <0.50 <0.50 <0.50 <0.50 51 -- 60 16 <0.50 <0.50 <0.50 0.2 7.05 0.00 -4.48 08/01103 0.52 <0.50 <0.50 <0.50 <50 -- 80 7.8 <0.50 <0.50 <0.50 0.2 7.65 0.00 -5.08 10/23/03 <0.50 <0.50 <0.50 <0.50 <50 -- 28 <5.0 <0.50 <0.50 <0.50 1.5 6.95 0.00 -4.38 01/12/04 <0.50 <0.50 <0.50 <0.50 <50 -- 70 6.0 <0.50 <0.50 <0.50 0.8 5.90 0.00 -3.33 04/27/04 0.68 <0.50 <0.50 1.9 <50 -- 110 9.7 <0.50 <0.50 <0.50 0.8 7.03 0.00 -4.46 07/08/04 <0.50 <0.50 <0.50 <0.50 <50 -- 170 17 <0.50 <0.50 <0.50 0.7 7.35 0.00 -4.78 10/08/04 0.75 <0.50 0.82 0.62 78 -- 110 41 0.55 <0.50 <0.50 d 0.1 7.50 0.00 -4.93 02/18/05 <0.50 <0.50 <0.50 <0.50 <50 -- 36 29 <0.50 <0.50 <0.50 0.4 5.67 0.00 -3.10 06/08/05 0.57 <0.50 <0.50 <0.50 <50 -- 160 96 0.76 <0.50 <0.50 0.6 6.96 0.00 -4.39 09/01/05 2.3 0.78 <0.50 1.1 110 -- 100 81 0.84 <0.50 <0.50 3.5 7.51 0.00 -4.94 1:17-Elevenl7-11 Stores1206321Tables120632 Current Groundwater.xisHistorical Water Page 6 of 8