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Table 8 ARCO Historical Soil Analytical Data ARCO Service Staton 2133 . 2908 Benjamin Holt Drive Stockton,California Sample TRH as Sample Depth Date Gasoline Benzene Toluene Ethylbenzene Xylenes MtBE Lead Name (feet) Sampled (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) AS-9 9-9.5 02/24/06 0.32 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 15-15.5 02/24/06 73 <0.050 <0.050 <0.050 <0.050 <0.025 20-20.5 .02/24/06 3.3 <0.0050 <0.0050 <0.0050 . <0.0050 <0.0050 26-26.5 02/24/06 <0.10 <0.0050 <0.0050 <0.0050 <0:0050 <0.0050 34-34.5 02/24/06 <0.10 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 43.5-44 02/24/06 <0.10 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 53.5-54 02/24/06 <0.10 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 AS-10 10.5-11 02/27/06 1000 <10 <10 <10 87 <5.0 15-15.5 02/27/06 0,22 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 23-23.5 02/27/06 130, 0.0069 0.20 0.52 6.6 <0.025 36-36.5 02/27/06' <0.10 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 45-45.5 02/27/06 <0.10 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 -- 53-53.5 02/27/06 <0.10 <0.0050 <0.0050 <0.0050 0.0077 <0.0050 -- 60-60.5 02/27/06 <0.10 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 -- AS-11 10-10.5 03)02/06 <0.10 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 - 15-15.5 03/02/06 <0.10 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 - Monitoring Wells MW-1 13.5-14 10/11/93 <1.0 <0.005 <0.005 <0.005 <0.005 - MW-2 10.5-11 10/19/93 560 0.45 4.8 3.2 42 - 15.5-16 10/19/93 780 0.39 2.6 4.7 2.7 - MW-3 6-6.5 12/21/94 <1.0 <0.005 <0.005 <0.005 <0.005 11-11.5 12/21/94 <1.0 <0.005 <0.005 <0.005 <0.005 16-16.5 12/21/94 <1.0 <0.005 <0.005 <0.005 <0.005 MW-4 6-6.5 12/21/94 <1.0 <0.005 <0.005 <0.005 <0.005 - 11-11.5 12/21/94 <1.0 <0.005 <0.005 <0.005 <0.005 - 16-16.5 12/21/94 <1.0 <0.005 <0.005 <0.005 <0.005 MW-5 6-6.5 12/21/94 <1.0 <0.005 <0.005 <0.005 <0.005 -- 11-11.5 12/21/94 <1.0 <0.005 <0.005 <0.005 <0.005 -- 16-16.5 12/21/94 <1.0 0.01 <0.005 <0.005 0.021 94275 Chevron&2133 Arco Historical soil Page 3 of 5 SECOR