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Attachment 3 Historical Soil Analytical Data Former Arco Service Station No. 0595 6100 North Highway 99, Stockton, California Sample MTBE Sample Depth Date GRO DRO B T E X MTBE (8260) TBA DIPE ETBE TAME Ethanol 7,2-DCA EDB Lead Name (feet) Sampled (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mglkg) (mg/kg) (mg/kg) (mg/k ) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) D1-0 13 1/3/2006 850 11.2 1.2 5.8 47 10.62 1120 10.62 <0 62 <0,62 <250 10.62 10.62 110 DHE 7 10/27/2010 <0.50 - 10.0010 <0.0010 10.0010 <0.0010 - 10.0010 - - - - 10.0010 - - 13 10/27/2010 <0.50 - <0.0010 0.0016 <0.0010 0.0014 - <0.0010 - - - - - <0.0010 - - 16 10/27/2010 10.50 - <0.0010 .0.0010 <0.0010 <0.0010 - <0.0010 - - - - - <0.0010 - - 20 10/27/2010 <0.50 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 - <0.0010 - D14W 7 10/27/2010 27' - <0.0010 0A13 0.066 0.48 - 0.0016 - - - - - 10.0010 - - 13 10/27/2010 2,100' - <0.10 <0.10 1.2 17 - <0.10 - - - - - <0.10 - - <0.10 0.21 15 120 10.10 <0.10 i6 70272010 2,600' - - - - - - - 20 10/27/2010 280' - 10.10 <0.10 0.42 3.1 - <D,10 - - - - - 10.10 - - <0.10 <0.10 <0.10 OA1 10.10 10.10 - 25 10/27/2010 72' - - - " DHD 7 10/27/2D10 <0.50 - 10.0010 <0.0010 <0.0010 -O.DO10 - '0.0010 - - - - - <D.DD10 - - 13 10/27/2010 <0.50 - <0.0010 <0.0010 <0.0010 10.0010 - '0.0010 - - - - - <0.0010 - - 16 10/27/2010 <0.50 - 10.0010 <0.0010 <O.DD10 <g.0010 - 0.0013 - - - - - <0.0010 - - 20 10/27/2010 <0.50 <0.0010 <0.0010 <0.0010 <0.0010 0.0026 - - <0.0010 DI-IN 7 10/272010 <0.50 - 0.0012 0.011 0.0032 0.021 - 0.0069 - - - - - <0.0010 - 13 10272010 11,000 - <4.0 41 100 1,000 - <4.0 - - - - - <4.0 - 16 10272010 4,800 - 14.0 44 77 490 - <4.0 - - - - <4.0 - - 20 10272010 8,600 - <2.0 76 130 800 - <2.0 - - - - - 12.0 - - 25 10272010 4,400 - 14.0 36 67 410 - <4.0 - - - - q.0 " 33 70272010 2.3' - <0.10 0.27 0.12 0.78 - 0.24 - - - - - <0.10 - - 40 70272010 2.7' 0.010 0.16 0.068 0.41 0.13 - <0.0010 - - <1.0 16 1 t 63 <1.0 <1.0 - DI-IN2 7 7027/2010 1,900 - - - - - - ' 13 10/27/2010 2,800 - 0.70 20 34 190 - 0.26 - - - - - <0.10 - - 14.5 1027/2010 1,600 - 0.23 9.0 20 100 - 0.10 - - - - - <D10 - - 16 10272010 2,100 - 0.28 76 32 170 - 0.19 - - - - - <0.10 - - 20 10272010 6,100 - 0.63 42 52 280 - 0.14 - - - - <0.10 - - 25 10272010 780' - 10.10 4.2 7.9 43 - 0.15 - - - - - 10.10 - - 42 10272010 0.96' 0.0024 0.023 0.013 0.099 0.097 - 0.0023 - - DI-IN3 5.5 11/12010 130 - 10.20 3.4 2.1 13 - <0.2D - - - - - <0.20 - - 7 11/1/2010 40 - 10.10 0.15 0.23 1.5 - <0.10 - - - - - < Ao - - 13 11/1/2010 <0.50 - 0.0023 0.0078 0.0062 0.035 - 0.018 - - - - - <0.0010 - - < <0.10 0.12 0.93 <0.10 10.10 i6 11/12010 1.2' - 0.10 - - - - - - - - 20 17/12010 4,600 - 0.40 22 67 370 - <D.20 - - - - - <0.20 - - 25 11/12010 360 - <0.20 1.2 4.3 26 - <0.20 - - - - - <D.20 - - 40 11/1/2010 0.69' 0.0069 0.053 0.037 0.23 0.14 - 0.0034 - DHS 6 10/26/2010 10.50 - 10.0010 <0.001 D 10.0010 <0.0010 - <0.0010 - - - - 10.0010 " 13.5 10/28/2010 10.50 - <0.0010 <0.001D <0.0010 <0.0010 - -0.0010 - - - - - <0.0010 - - 16 10/28/2010 10.50 < .0010 <0.0010 <0.0010 -0.001 D - 0.0042 - - - - - <0.0010 - - 20 1028/2010 1.1' - 10.0010 <0.0010 0.015 0.092 - 0.040 - - - - - <0.0010 - - 24 1028/2010 <0.50 <0.0010 <0.0010 <0.0010 <O.D010 0.0052 - <0.0010 - DI-4N 8 10282010 <0.50 - 10.0010 <0.0010 <0.0010 <0.0010 - <0.0010 - - - - - <0.0010 - - 13.5 10282010 1,300' - <0.10 -0.10 <0.10 <0.10 - <0.10 - - - - - 10.10 - - 16 10282010 8,800 - <2.0 <2.0 8.7 860 - <2.0 - - - - - -2.0 " 20 10282010 19,000' - <10 200 270 1,800 - <10 - - - - - 110 - - 25 10282010 430' - <0.20 1.0 3.2 22 - <0.20 - - - - - <0.20 - - 40 10282010 1.7' <0.10 0.14 0.14 0.74 0.76 - - -0.10 - - DI-4E 6 10282010 <0.50 - <0.0010 <0.0010 <0.0010 0.0011 - 0.0011 - - - - - <0.0010 - - <0.0010 <0.001D - 0.0017 <0.0010 13.5 10262010 10.50 - 10.0010 10.0010 - - - - - - - 16 10282010 0.87' - <0.0010 0.0019 0.0014 0.012 - 0.0043 - - - - - <0.0010 - - 20 10282010 2.8' - <0.10 <0.10 <0.10 0.43 - <0.10 - - - - - 10.10 - - 25 1o282010 16' - -O.lD 0.56 0.29 1.7 - <0.10 - - - - - 10.10 - - 35 10/282010 0.70 - <0.0010 0.011 0.0067 0.046 - 0.059 - - - - - <0.0010 - - 40 10/282010 9.1 0.013 0.066 0.062 0.26 0.62 - <0.0010 - - - DI-4D 6 10/282010 10.50 <0.0010 <0.0010 10.0010 10.0010 0.0039 - - - <0.0010 - 595 Arco Historical soil.xls Page 2 of 6