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Table 3-5 C-Sparge System Area Groundwater Analytical Data Summary Former Unocal Service Station #0187 437 East Miner Avenue Stockton, California Sample DO TPH9 Benzene Toluene Ethylbenzene Xylenes MTBE Well ID Date ( pm) (ppb) (ppb) (ppb) (ppb) (ppb) ( b) U-3113aseline 11/20-22/001'1 ---- 12,3001�1 515 65.0 1,460 1,290 <250/<20.0131 02/26-27/011'1 ---- 279 0.75 0.657 <0.500 7.93 <2.50/<2A131 05/14-16/011'1 --- <50.0 <0.500 <0.500 <0.500 <0.500 <5.00/<2.00131 08/13-15101�'� ---- <50 <0.50 0.72 <0.50 <0.50 <5.0/<2.0131 11/26-28/011'1 ---- 1,600121 17 7.6 33 44 <25/3.1131 02/25-27/02111 ---- 92141 <0.50 0.55 2.4 2.8 <5.0/<1.0131 05107-09102'1 ---- <50 <0.50 <0.50 <0.50 <0.50 <5.0/<1.0131 05/21/02 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.5 06/19/02 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.5 07/19/02 ---- 590161 6.0 1.8 6.3 5.2 <2.5 08/12-14102'1 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.5/<1.0131 08/22/02 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.5 09/20/02 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.5 10/21/02 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.5 11/05-06/02111 ---- 220 2.1 <0.50 2.4 1.9 <2.5/<2.0131 11/21/02 ---- 170 c0.50 <0.50 2.0 <0.50 <2.5 12/18/02 -.-- <50 <0.50 <0.50 <0.50 <0.50 <2.0 01/23/03 ---- 150 3.3 <0.50 0.5 2.1 <2.0 02/04-06103111 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.0/<2.0131 03/21/03 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.0 04/22/03 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.0 05/20/03 ---- 190 39 3.1 2.0 30 <2.0 05/27-301031'1 ---- 150 1.2 <0.50 <0.50 0.74 c2.0/<0.50131 06/20/03 ---- <50 1.5 <0.50 <0.50 <0.50 <2.0 07/22/03 ---- 230 1.8 0.59 1.7 2.3 <2.0 08/22/03 ---- 550 5.4 3.3 5.3 3.0 <2.0 8/26-29/03['J -- - 350 4.3 2.0 2.4 2.6 <2.0/<0.50131 09/18/03 - -- 530111 2.0 1.0 2.7 0.59 <0.50 10/16/03 ---- 760[6] 3.2 1.9 6.8 2.0 <2.0 11/28/03 7.4 760 9.5 3.9 11.0 7.5 <0.50131 14 of 17 302005 06940-325