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Attachment 3 Historical Soil Analytical Data Former Arco Service Station No. 0595 6100 North Highway 99, Stockton, California Sample WEE Sample Depth Date GRO DRO B T E X MTBE (8260) TBA DIPE ETBE TAME Ethanol 1,2-DCA EDB Lead Name (feet) Sampled (mg/kg) (mglkg) (mg/kg) (mg/kg) (mglk ) (mg/kg) (mg/kg) (m /kg) (mg/kg) (m kg) (m /k ) (m /k ) (mg/kg) (mg/k ) (mg/k ) (mg/kg) Underground Storage Tanks PB) PB-1 17 12/29/2005 .0.10 - <0.0050 .0.0050 .0.0050 .0.0050 - <0.0050 <0.020 .0.0050 <0.0050 <0.0050 <0.10 <0.0050 -0.0050 <10 PB-2 77 12/29/2005 .0.10 - .0.0050 .0.0050 .0.0050 .0.0050 - .0.0050 <0.020 <0.0050 .0.0050 .0.0050 <0.10 <0.0050 <0.0050 110 PB-3 17 12/29/20D5 2,200 - <1.2 1.6 1.8 100 - <0.62 <120 <0.62 <0.62 <0.62 <250 <0.62 <D.62 -10 PBA 17 12/29/2005 <0.10 - <0.0050 <0.0050 .0.0050 <0.0050 - <0.0050 <0.020 <0.0050 .0.0050 <0.0050 <0.10 <0.0050 <0.0050 -10 PBA 17 12129/2005 <0.10 - <0.0050 <D.0050 <0.0050 <0.0050 - <0.0050 <0.020 <0.0050 .0.0050 <0.0050 <0.10 <0.0050 <0.0050 11 PB-6 17 12119/2005 <0.10 - .0.0050 <0.0050 <0.0050 <0.0050 - <0.0050 <0.020 <0.0050 -0.0050 <0.0050 <0.10 <0.0050 <0.0050 <10 0 PB-7 17 12119/2005 <0.10 .0050 <0.0050 <0.0050 .0.0050 - <0.0050 <O.D20 .0.0050 <0.0050 <O.D050 <0.10 <0.0050 <0.0050 <10 - < PBA 17 12(29/2005 .0.10 .0.0050 .0.0050 .0.0050 .0.0050 .0.0050 .0.020 c0.005D .0.0050 .0.0050 .0.70 .0.0050 .0.0050 -10 PB-3S 18 10/29/2010 2,600 - <0.20 1.3 1.9 130 - <0.2D - - - - - <D20 - - 21.5 10/29/2010 4,200 - <0.20 68 73 590 - <0.20 - - - - - <0.20 - - 25 10/29/2010 2,600 <0.20 32 46 310 - 0.28 - - - - - .0.20 - - 40 10/29/2010 1,600 OAS 48 26 170 3.900 - - <020 PB-3W 17 11/1/2010 <0.50 - <0.0010 0.0050 0.0019 0.0076 - 0.0018 - - - - - -0.0010 - - 21.5 11/1/2010 3,600 - <0.20 3.1 60 320 - <0.20 - - - - - .0.20 - - 25 17/1/2010 470 - <0.20 <0.20 4.6 24 - <0.20 - - - - - .0.20 - - 40 11/1/2010 710 <0.20 10 13 76 028 - - <0.20 PB30 18 10/29/2010 610 - <D20 0.46 0.62 26 - OAS - - - - - <020 - - 20 10/29/2010 7,600 - <020 66 120 1,300 - OA4 - - - - - <0.20 - - 2L5 10/29/2010 14,000 - 1.4 480 320 2,500 - 0.89 - - - - - <0.20 - 25 10/29/2010 1,200 - <0.20 20 18 130 - 1.6 - - - - - <020 - 40 10/29/2010 1,100 - 0.32 41 18 110 - 4.6 - - - - - <0.20 - - Product Line Samples(PL,OPL,VL and LS) PL-1@4' 4 9/10/1999 2,130 - 11A 68.8 35.3 159 <5.00 1.26 <10.0 <0.100 -0.100 <0.100 <150 <0.100 <0.100 - PL-2@5' 5 9/10/1999 1,750 - <0.250 4.62 9.75 52.6 <2.50 0.229 <10.D <O.1DD -0.100 <0.100 <150 <0.100 <0.100 PL-2@7' 7 9/10/1999 24.1 - 0.0316 0.247 0.275 1.72 <0.0500 <0.100 <1D.0 <0.100 -0.1()0 <0.100 <160 <0.100 <0.100 - PL-3 @ 3.5' 3.5 9/14/1999 11.1 - 0.114 0.216 0.269 1.18 0.38 0.299 <10.0 <0.100 <0.100 <D.100 <150 <0.100 <0.100 - PL4 @ 3' 3 9/14/1999 843 - 2.02 9.06 9.69 60.3 <5.00 0.692 <10.0 <0.100 <0,100 <0.100 <150 <0.100 .0.100 PL-5 @ 4.5' 4.5 9/14/1999 1.94 - <0.00500 <0.00500 <0.00500 0.0382 <0.0500 -0.100 470.0 <0.100 <0.100 <0.100 <150 <0.100 <0.100 - PLA @ 5' 5 9/14/1999 <1.0 - -0.00500 <0.00500 <0.00500 <0.00500 <0.0500 <0.100 <10.0 <0.100 <0.100 <0.100 <15D <0.100 <0.100 - VP-1 @ 3.5' 3.5 9/14/1999 5.07 - .0.00500 <0.00500 0.0117 0.0108 <0.0500 <0.100 <10.0 -0.100 <0.100 <0.100 <150 <0.100 <0.100 - OPL-1 @ 3.5' 3.5 9/14/1999 <1.0 - <0.00500 <O.OD500 <0.00500 <0.00500 <0.0500 <0.100 <10.D <0.100 <0.100 <0.100 <150 <0.100 <0.100 - OPL-2 @ 5' 5 9/14/1999 <1.0 - <D.00500 <O,OD500 <0.00500 -0.00500 <0.0500 <0.100 <1D.0 4.100 <0.100 <0.10D <150 <0.10D <0.100 - OPL3 @ 4.5' 4.5 9/14/1999 11,300 - 10.3 73.2 114 485 <25.0 <0.100 <10.0 <0.100 <0.100 <0.100 <150 <0.100 <0.100 - VL-1@3.5' 3.5 9/14/1999 8,740 - 74.6 177 98 382 <25.0 0.774 <10.0 <0.100 <0.100 -0.100 .150 <0.100 <0.100 - VL-2 @ 3' 3 9/14/1999 21 - 0.106 0.222 0.123 1.01 <0.25D 0.197 .10.0 <0.100 <0.100 .0.100 -150 -0.100 <0.100 - VL-3@3' 3 9/14/1999 136.0 - 0.592 -0.250 0.623 6.09 <2.50 0.11 <10.0 <D.1DO <0.100 -0.100 <150 <O.1D0 .0.100 - - 9.59 67.1 44 204 <12.5 1.00 <10.0 <0.100 <0.100 .0.100 .150 .0.100 .0.100 - LS-1 6 12/29//29/2005 1.8 <0 0050 10.0050 <0.0050 0.020 - VL-4 @ 3.5' 3.5 2 999 3,410 <0.0050 -0.020 <0.0050 .0.0050 <0.0050 .0.10 <0.0050 .0.0050 <10 - 1-S-2 6 12/29/2005 0.17 - <0.0050 <0.0050 '0.0050 0.014 - .0.0050 <0.020 .0.0050 10.0050 <O.DO50 <0.10 <0.0050 <0.0050 11 Dispenser Island Boreholes(D and DI) -1 @ 3' 3 9/10/1999 6,370 - 30.3 156 81.3 362 <12.5 6.47 <10.0 <0.100 <0.100 <0.100 <150 <0.100 .0.100 - D-1 @ 5' 5 9/10/1999 1,830 - 2.08 19.6 19 92.9 <5.00 1.34 <10.0 -0.100 <0.100 <0.10D <150 <0.100 <0.100 - D-2 @ 5' 5 9/10/1999 220 - 1.38 6.72 3.77 18.7 <1.00 0.699 <10.0 <0.100 <0.100 <0.1DO <150 <0.100 <0.100 - D-3 @ 4.5' 4.5 9/10/1999 7,670 - 45.2 294 127 582 <25.0 0.8D2 410.0 <D.1DO <0.100 <0.100 <150 <0.100 <0.100 - D3 @ 5' 5 9/10/1999 4,280 - 483 196 76.6 351 <25.0 1.61 <10.0 -0.100 <0.100 <0.100 <150 <0.100 <0.100 - 0-5@4' 4 9/10/1999 4,210 - 29.7 122 62.2 298 <25.0 1.00 <10.0 <0.100 <D.100 <0.100 <150 <0.100 -0.100 - DI-1 7 12/29/2005 610 - <1.2 <1.2 3.8 28 - <0.62 <120 .0.62 <0.62 <0.62 <250 <0.62 .0.62 11 DI-1 13 1/3/2006 1,000 - <1.2 <2.5 6.9 61 - 11.2 <250 <1.2 11.2 11.2 .SOD 11.2 <1.2 16 DI-2 12/29/2005 <0.10 - <0.0050 <0.0050 <0.0050 -0.0050 - .0.0050 -0.020 <0.0050 .0.0050 -0.0050 .0.10 -0.0050 .0.0050 14 D43 5..5 12/29/2005 .0.70 - .0.0050 .0.0050 .0.0050 .0.0050 - .0.0050 0.039 .0.0050 .0.0050 .0.0050 .0.10 .0.0050 .0.0050 17 DI-4 5.5 12/29/2005 1,100 12.5 2.7 6.6 48 <1.2 .250 <1.2 <1.2 11.2 .500 11.2 <1.2 76 595 Arco Historical soil.lds Page 1 of 6