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Table 9 C-Sparge System Pilot Test Groundwater Chemical Analytical Data Former Unocal Service Station #0187 437 East Miner Avenue, Stockton Sample DO TPHg Benzene Toluene Ethytbenzene Xylenes MTBE Well ID Date (PPM) (ppb) (ppb) ( b) (ppb) (Pb) (ppb) U-101 Baseline 11120-221001'1 ---- 3831" 57.9 0.738 1.90 1.42 <5.001<2.00131 02/26-27101 334 30.4 <0.500 0.852 <0.500 <2.50/<2.0131 05/14-16/011'1 ---- 261[21 22.7 <0.500 <0.500 <0.500 <5.00/<2.00131 08113-15/011'1 ---- 3601'1 33 1.1 <0.50 <0.50 <5.0/<2.0131 11126-281011'1 ---- 160121 17 0.51 <0.50 <0.50 <5.0/<1.0131 02125-27102111 --_ 280151 29 0.69 <0.50 <0.50 <5.01<1.0j31 05/07-09102111 -- 130141 13 1.4 <0.50 1.2 <5.01<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 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.5 8112-141021'1 ---- 180 25 0.81 <0.50 0.69 <2.51<1.0131 08122/02 -- <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 10121/02 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.5 11/05-06/021'1 ---- 50 1.9 <0.50 <0.50 <0.50 <2.5/<2.0131 11121/02 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.5 12/18/02 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.0 01/23/03 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.0 02/04-06/03111 ---- 99 1.8 <0.50 <0.50 <0.50 4.21<2.0131 03/21/03 -- <50 <0.50 <0.50 <0.50 <0.50 <2.0 04/22/03 ---- 160161 3.5 <0.50 <0.50 <0.50 12 05/20103 --- 200 2.4 <0.50 <0.50 <0.50 6.6 05/27-30/031'1 140 1.5 1.4 <0.50 1.6 4.9/0.76131 06/20/03 ---- 130 1.3 <0.50 <0.50 0.71 4.2 07/22/03 ---- 130 0.69 <0.50 <0.50 0.59 <2.0 08/22/03 ---- 700 6.7 4.7 8.5 5.6 <2.0 8/26-291031'1 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.01<0.50131 09/18/03 ---- <50 <0.50 <0.50 <0.50 <0.50 <0.50 10/16/03 ---- <50 <0.50 <0.50 <0.50 <0.50 <2.0 0694 ENSOoration �■■ 1■■I r IIIA � I� >• � Is � � � � � IIIA i■r � � �