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Attachment 3 Historical Soil Analytical Data Former Arco Service Station No. 0595 6100 North Highway 99, Stockton, California Sample Mlhh Sample Depth Date GRD DRO B T E X MTBE (8260) TBA RIPE ETBE TAME Ethanol 1,2-DCA EDB Lead Name (feet) Sampled (mglkg) (mg/kg) (mg/kg) (mglkg) (mg/kg) (mglkg) (mglkg) (mg/kg) (mg/kg) (mglkg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (mglkg) Underground Storage Lanka(PB) PB-1 17 72/29/2005 -0.10 - 10.0050 -0.0050 -0.0050 -0.0050 - <0.0050 <0.020 -0.0050 -0.0050 -0.0050 -0.10 -0.0050 '0.0050 110 PB-2 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-3 17 12/29/2005 2,200 - <1.2 1.6 1.8 1DO - -0.62 <120 <0.62 <0.62 -0.62 <250 <0.62 <0.62 <10 PB-4 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 PBS 17 12/29/2005 <0.10 - <0.0050 <0.0050 -0.0050 <0.0050 - <0.0050 <O.D20 <0.0050 <0.0050 <0.0050 <0.10 <0.0050 <0.0050 11 PB{ 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 <O.OD50 <0.0050 <10 PB-7 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 <to PB-8 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 110 PB-3S 18 10/29/2010 2,600 - <0.20 1.3 1.9 130 - <0.20 - - - - - <0.20 - - 21.5 10/292010 4,200 - <0,20 68 73 590 - <0.20 - - - - - <020 - - 25 10292010 2,600 - <0.20 32 46 310 - 0.28 - - - - - <0.20 - - 40 10292010 1.600 0.46 48 26 170 3.900 - <0.20 - PB-3W 17 11/12010 750 - <0.0010 0.0050 0.0019 0.0076 - 0.0018 - - - - - <0.0010 21.5 11/1/2010 31600 - <0.20 3.1 60 320 - <0.20 - - - - - <0.20 - - 25 11/1/2010 470 - <0.20 <0.20 4.6 24 - <0.20 - - - - - <0.20 - - 40 11/12010 710 <0.20 10 13 75 0.28 - - <0.20 - - P6-3D 18 10/292010 610 - <0.20 0.46 0.62 25 - 0.48 - - - - - <D.20 - - 20 10/292010 7,600 - <D20 66 120 1,300 - 0.44 - - - - - <0.20 - - 21.5 10292010 14,000 - 1.4 480 320 2,500 - 0.89 - - - - - <0.2D - - 25 10/29/2010 1,200 - -0.20 20 18 130 - 1.6 - - - - - <0.20 - - 40 10/29/2010 11100 - 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 <OADO <0.100 7100 <150 7100 <0.100 - PL-2 @ 5' 5 9/10/1999 1,750 - <0.250 4.52 9.75 52.6 <2.50 0.229 <10.0 <0.100 <0.100 <0.10D <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 <lD.0 <0.100 <0.100 <0.100 <150 <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 <0.100 050 <0.100 <0.100 - PL-4 @ 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 <15D -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 <10.0 <0.100 <0.100 -0.100 <150 <0.100 <0.100 - PL-6 @ 5' 5 9/14/1999 <1.0 - <D.00500 <0.00500 <0.00500 <0.00500 <0.0500 <0.100 <10.0 <0.100 <0.100 -0.100 <150 <0.100 <0.100 - VP-1@3.5' 3.5 9/14/1999 6.07 - <0.00500 <0.00500 0.0117 0.0108 <D.0500 <0.100 <10.0 <0.100 <0.100 -OADD <150 <0.100 <0.100 - OPL-1 @ 3.5' 3.5 9/14/1999 <1.0 - <0.00500 <0.00500 <0.00500 <0.00500 <D.0500 <0.100 <10.0 <0.100 <0.100 <O.IOD <150 <0.100 <0.100 - OPL-2 @ 5' 5 9/14/1999 <1.0 - <0.00500 <0.00500 <0.00500 -0.00500 <D.0500 <0.100 <10.0 <0.100 <D,100 -0.100 <150 <0.100 <0.100 - OPL-3@4.5' 4.5 9/14/1999 11,300 - 10.3 73.2 114 485 <25.0 <0.100 00.0 <0.100 -0.100 <0.100 <150 <0.100 <0.100 - VL-1 @ 3.5' 3.5 9/14/1999 8,740 - 34.6 177 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 <0.250 0.197 <10.0 <D.100 <OADO <0.100 <150 <0.100 -0.100 - VL-3 @ 3' 3 9/14/1999 138.0 - 0.592 <0.250 0.623 6.09 <2.50 0.11 <10.0 <0.100 <OADO <0.100 <150 <0.100 <0.100 - VL-4@3.5' 3.5 9/14/1999 3,410 - 9.69 67.1 44 204 <12.5 1.00 <10.0 <0.100 <0.100 <0.100 <150 -0.100 <0.100 - LS-1 6 1228/2005 1.8 - c0.0050 -0.0050 -00050 0.020 - <0.0050 <0.020 <0.0050 <0.0050 <0.0050 <0.10 -0.0050 <0.0050 <10 LS-2 6 12/29/2005 0.17 - <0.0050 <0.0050 10.0050 0.014 - -0.0050 <0.020 -0.0050 <0.0050 <0.0050 <0.10 <0.0050 <0.0050 11 Dispenser Island Boreholes(D antl DI) D-1 @ 3' 3 9/10/1999 6,370 - 30.3 155 81.3 362 -12.5 6.47 <10.0 <0.100 <0.100 <0.100 050 <0.100 -0.100 - D-1@5' 5 9/10/1999 11630 - 2.08 19.6 19 92.9 <5.00 1.34 <10.0 -0.100 <OADO <0.100 <150 <0.100 <0.100 - D-2 @ 5' 5 9/10/1999 220 - 1.38 5.72 3.77 13.7 <1.00 0.699 <1D.0 <0.100 <0.100 -OAD0 <150 <0.100 <0.100 - D-3 @ 4.5' 4.5 9/10/1999 7,670 - 45.2 294 127 582 <25.0 0.802 <10.0 <0.100 <0.100 <0.100 -150 <0.100 <0.100 - D4 @ 5' 5 9/10/1999 4,280 - 48.3 195 76.5 351 <25.0 1.61 <10.0 -0.100 <0.100 <0.100 <150 <0.100 <0.100 - D-5 @ 4' 4 9/10/1999 4,210 - 29.7 122 62.2 298 <25.0 1.00 <10.0 -0.100 <0.100 <0.100 <150 -0.100 <0.100 - <0.62 <120 <0.62 <0.62 <0.62 <250 <0.62 -0.62 11 01-1 7 12/292005 610 - 11.2 <1.2 3.8 28 - 01-1 13 1/3/2006 1,000 - 11.2 12.5 6.9 61 - 11.2 -250 11.2 17.2 <1.2 -500 11.2 <1.2 16 DI-2 1229/2005 <0.10 - <0.0050 <0.0050 <0.0050 -0.0050 - <0.0050 <0.020 <0.0050 -0.0050 <D.D050 <0.10 <0.0050 <0.0050 14 DI-3 5..5 1229/2005 -0.10 - -0.0050 -0.0050 -0.0050 -0.0050 - -0.0050 0.039 -0.0050 -0.0050 <p.0050 -0.10 -0.0050 -0.0050 17 D" 6.6 1229/2005 11100 <2.5 2.7 6.6 48 <1.2 <250 11.2 <1.2 11.2 <S00 <12 <1.2 16 595 Arco Histoncal soil.lds Page 1 of 6