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Attachment 3 Historical Soil Analytical Data Former Arco Service Station No. 0595 6100 North Highway 99, Stockton, California Sample NITHE 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) (mg/kg) (mg/kg) (mg/kg) (mg/kg) (m /k ) (mg/kg) (m /k ) (mg/kg) (Mg/kg) (mglkg) (mg/kg) (mg/kg) (mglk ) (m /kg) (mg/kg) DMW-2,94' 94 6/25/2002 <1.0 <5.0 <0.0050 '0.0050 '0.0050 '0.0050 '0.20 <2,5 '0.10 '0.10 '0.10 - '0.10 '0.20 - DMW-3,60' 60 6/27/2002 -1.0 <5.0 '0.0050 <0.0050 '0.0050 <0.0050 - <0.20 -2.5 <0.10 -0.10 '0.10 - '0.10 <0.20 DMW-3,79' 79 627/2002 <1.0 <5.0 <0.0050 -0.0050 '0.0050 <D.0050 - <0.20 <2.5 '0.10 '0.10 <0.10 - <0.10 <0.20 - DMW-3,96' 96 627/2002 <1.0 <5.0 <0.0050 -0.0050 '0.0050 <D.0050 - <D.20 <2.5 <0.10 <0.10 <0.10 <0.10 <0.20 - MW-1R 61' 61 11/182008 <0.50 - 0.0091 <0.0010 <0.13010 <O.DO10 - 0.022 '0.010 <O.0020 <0.0020 <0.0020 <0.10 <0.0010 <0.0010 - MW-1R 66' 66 11/182008 <0.50 - 0.0020 <0.0010 <0.0010 <0.0010 - 0.020 0.012 <0.0020 <0.0020 '0.0020 <0.10 '0.0010 <0.0010 - MW-1R 71' 71 11/182OD8 <0.50 <O.OD10 <0.0010 <0.0010 <0.0010 0.012 -O.D10 <0.0020 <0.0020 <0.0020 <0.10 -0.0010 '0.0010 - MW-2R 60' 60 11/122008 -0.50 - <0.0010 <0.0010 <0.0010 <0.0010 - 0.0160 <O.D10 <0.0020 <0.0020 <O.DO2D <0.10 0.002 <0.0010 MW-2R 65' 65 11/122008 <0.50 - <0.0010 <0.0010 <0.0010 -0.0010 - 0.0059 <0.010 <0.002D <0.0020 <0.0020 '0.10 0.0027 <0.0010 - MW-2R 70' 70 11/122008 -0.50 <0.0010 <0.0010 <O.DO10 '0.0010 - 0.0082 <0.010 '0.0020 <O.0020 <0.0020 -0.10 0.0026 <0.0010 MW-3R 65' 65 11/192008 <0.50 - <0.0010 <0.0010 <O.DO10 <O.D010 - <0.0010 <0.010 <0.0020 <0.0020 <0.0020 <0.10 <0.0010 <0.0010 - ' MW-3R 70' 70 11/192008 <0.50 - <0.0010 <0.0010 <0.0010 <0.0010 - <0.0010 <0.010 <0.0020 <0.0020 '0.0020 <0.10 <0.0010 <O.DO10 - MW-3R 75' 75 11/192006 <0.50 <0.0010 <0.0010 <O.D01D <0.0010 <0.0010 -O.D10 <0.0020 <0.0020 <0.0020 <0.10 <0.0010 '0.0010 - MW-4R40' 40 11/132008 <0.50 - <0.0010 <0.0010 <0.0010 <0.0010 - '0.0010 <0.010 <0.0020 <0.0020 <O.DO20 <0.10 '0.0010 <0.0010 - MW<R 70' 70 11/13/2008 <0.50 - -0.0010 <0.001D -0.0010 <0.0010 - 0.018 <0.010 <0.002D <0.0020 <0.0020 <0.10 0.0031 <0.0010 - MW-0R 75' 75 11/13/2008 <0.50 <0.0010 '0.0010 <0.0010 <0.0010 0.041 <0.010 <0.0020 <0.0020 <0.0020 <0.10 0.0025 <0.0010 - Monitoring Wells(MW)continued MW-6R 10 10 4/14/2009 <0.50 - <0.0010 <0.0010 -0.001D '0.0010 - <0.0010 <0.010 <0.002D <0.0020 <0.0020 '0.10 -0.0010 <0.0010 - MW-6R70' 70 4/14/2009 <0.50 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 '0.010 <0.0020 <0.0020 <0.0020 '0.10 <0.0010 '0.0010 - <0.001D <0.0010 - <0.0010 <0.010 <0.0020 <0.0020 <0.0020 <0.10 <0.0010 <0.0010 MW-BR 60' 60 11/112008 '0.50 - '0.0010 '0.0010 - MW-8R 65' 65 11/112008 <0.50 - <0.0010 <0.0010 <0.0010 <0.0010 - <0.0010 <0.010 <O.0020 -0.0020 <0.0020 <0.10 '0.0010 <0.0010 - MW-8R 75' 75 11/112008 <0.50 <0.0010 <0.001D -0.0010 -0.0010 <0.0010 <0.010 <0.0020 <0.0020 <0.0020 <0.10 <0.0010 -0.0010 - MW-10R-61 61 1282009 <0.50 <0.0010 <0.0010 '0.0010 <0.0010 - <0.0010 '0.010 <0.0020 '0.0020 <0.0020 <0.10 <0.0010 '0.0010 - <0.0010 <0.0010 <0.0010 <D.DO10 <0.0010 '0.010 <0.0020 <0.0020 <0.0020 <0.10 <O.OD70 <0.0010 - MW-tOR45 66 1/121208 <0.50 - DMW-1R45' 45 11/122008 '0.50 - '0.0010 '0.0010 '0.0010 '0.0010 - '0.0010 '0.010 '0.0020 '0.0020 -0.0020 '0.10 '0.0010 '0.0010 - DMW-1R 65' 65 11/122008 <0.50 - <0.0010 <0.0010 <0.D01p <0.0010 - <0.0010 <0.010 <0.0020 <0.0020 <O.DD20 <0.10 <0.0010 <0.0010 - DMW-1R75' 75 11/12/2008 <0.50 - <0.0010 <0.0010 -0.0010 <0.0010 - 0.018 <O.010 <0.002D -0.0020 <0.0020 <0.10 0.0017 '0.0010 - DMW-1R 100' 100 11/12/2008 <0.50 '0.0010 <0.0010 -0.0010 <0.0010 0.077 -0.010 <0.0020 <0.0020 <0.0020 <0.10 0.0023 '0.0010 '0.0010 <0.0010 <0.0D10 <0.010 <0.0020 <0.0020 -0.0020 <0.10 0.0044 <0.0010 DMW-2R 60' 60 11/132008 <0.50 - <0.0010 <D.0010 - - DMW-2R 65' 65 11/132008 '0.50 - '0.0010 '0.0010 '0.0010 '0.0010 - '0.0010 '0.010 '0.0020 -0.0020 '0.0020 '0.10 0.0067 '0.0010 - DMW-2R70' 70 11/142008 <0.50 <0.0010 <0.0010 <0.0010 <0.0010 <0.0010 <0.010 <0.0020 <0.0020 <0.002D <0.10 0.0023 <0.0010 <0.0010 0.0013 <0.0010 '0.010 <D.0020 <0.002D '0.0020 <0.10 <D.001D <0.0010 DMW-3R 65' 65 11/172008 <0.50 - '0.0010 0.0011 - - DMWJR70' 70 11/17/2008 '0.50 - '0.0010 0.0073 '0.0010 0.0016 - '0.0010 '0.010 '0.0020 '0.0020 '0.0020 '0.10 '0.0010 '0.0010 - DMW-3R 75' 75 11/17/2008 -0.50 - <0.0010 0.0011 <0.001D 0.0016 - <D.D010 '0.010 '0.0020 .0.0020 '0.0020 '0.10 '0.0010 <O.OD10 - Stookpiled6ol4(SP) <0.0050 -0.020 <0.0050 '0.0050 .0.0050 <0.099 <0.0050 <0.0050 <10 P-1-2 - 12/29/2005 '0.099 - <0.0050 <0.0050 '0.0050 <0.0050 - <0.0050 <0.0050 <10 SP-34 - 12292005 '0.10 - '0.0050 '0.0050 '0.0050 '0.0050 - '0.0050 '0.020 '0.0050 '0.0050 -0.0050 '0.10 SP-7- - 12/292005 <0.10 - <0.0050 <0.0050 '0.0050 <0.0050 - '0.0050 <0.020 <0.0050 <0,005D -0.0050 <0.10 <0.0050 <0.0050 <10 SP-7-88 - 12/282005 '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 SP-9-10 - 12292005 '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 SP-11-12 - 12292005 <0.10 - -0.0050 <0.0050 <0.0050 <0.0050 - <0.0050 <0.020 <0.005D -0.0050 <0.0050 <0.10 <0.0050 <0.0050 -10 '0.025 <5.0 <0.025 '0.025 <0.025 <10 <0.025 '0.025 -10 SP-13-14 - 1229/2005 210 - '0.050 0.067 3.7 1.9 - <0.50 -100 <0.50 <0.50 <0.50 <200 <D.50 <0.50 is SP-19-22 - 1/3/2006 540 - 0.2 1.6 3.7 29 - SP-19-22 - 1/3/2006 620 - '0.25 0.74 3.6 27 - '0.12 <26 '0.12 '0.12 '0.12 <50 '0.12 '0.12 <10 SWc-1 11/112008 <0.50 <0.0010 <0.0010 <0.0010 <0.0010 <O.OD10 <0.010 <0.0020 <0.0020 <O.DO20 <0.10 <0.0010 <0.0010 6.26 Notes GRO=Gasoline range organics 'Quantification of unknown hydrocarbon(s)in the sample based upon the specified standard DRO=Diesel range organics B=Benzene T=Toluene E=Ethylbenzene X=Xylenes 595 Arco Historical soil.xls Page 5 of 6