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Table 1:Current and Historical Soil Analytical Data Former ARCO Service Station No.0595 Sample Total MTBE Sample Depth Date TPHGRO TPH-DRO Benzene Toluene Ethylbenzene Xylenes MTBE (8260) TBA DIPE ETBE TAME Ethanol 1,2-DCA EDB Lead Name (feet Sampled Nae lemi (or8t 1 m gl Im k ) mg/kg) mglkg) (m k (mg)k mglk 1 (m (mglkg m Ik (mglkg) nnOc I (mglkg) (m k L Cheri(Resideneiall ommedcaluLtioly Worker) - - t.g;2.019.2;12/14 - 21;]2199;1341314 - - May 2013 ESLs ShallowlDeep 1001490 100210 0.044 2.9 3.3 2.3 0.023 0.023 0.075 - 0.0045 0.00033 80 Monitorin Wells ii continued Del 65' 65 11/132008 <OSO - -0.0010 <00010 <0.0010 -.110 - -0.0010 -0.010 -0.0020 10.0020 <00020 X0.10 -0.0010 DMW-2R]0' ]0 11/14201 -0.50 - '00010 -00010 <0110 -00010 - -0.0010 -0.010 -00020 10.0020 -0.0020 -0.10 0.0029 -0.0010 DMW-3R B5' 85 11/1]2008 -0.50 - -0.0010 0.0011 -0.0010 0.0013 - -0.0010 -0.010 -0.0020 10.0020 -0.0020 -0.10 -0.0010 10.0010 DM-3R]0 70 111172W8 <0.50 - -00010 0,0013 :0.0010 0.0018 <O.W10 -0.010 <0.0020 <0.W20 -0.0020 -0.10 :0.0010 -0.0010 DMW-3R75' n 7I s 11/1]2000 10.50 - <.1f0 0.0011 :0.110 0.0016 <0.0010 -0.010 10.W20 -0 W20 -0.0020 <.10 :0.0010 <0.0010 o a or as oe VE-1.10' 10 1120/2012 -0.10 -0. SVE-1-20' 20 11202012 10 - _ - _ -1.0 10 SVE-1-35' 00.10 0.67 0.67 - - 35 11202012 41 - _ - 10.10 SVE-1489' 99 11202012 1 -0.0010 0.013 0.016 0.1 0.013 - - SVE-2-25' 25 11/192012 -0.50 - -.110 -00010 -0.0010 -0.0010 - -0.0010 - - - -0.0010 SVE-2-88 66 11/192012 <0.1 - -0.0010 -0.0010 :0.0010 -.110 - 0.0088 0.001 SVE-2-]0 92 70 11/1012 -0.50 -0.110 <0.110 -0.0010 0.0012 0.00 4 43 - - - - - -0004 - as am 9iled 8 92 198] <10 e10 -0.001 < D01 -U.Wl <0001 - - - - Stockpiled Soils SP) - - - -0.001 - -1-2 - 1229200 :0. - -0.0050 <o 50 <.1W -0.0350 - -0WW -0.020 -0.0050 <O.W50 <),W50 :o088 <0.00 -00050 110 SP-3-0 - 1229/2005 -0.10 - <0.00W -0.0050 100050 c0.W50 - -00050 <.02(I -0.0050 -0.100 < ,W50 -0.10 -0.0050 :0.0050 <10 SP-66 1229215 -0.10 - <O.WW <O.WW <.OD50 -0.11 - -0.0050 -0.020 <.W1 10.0050 -.150 <0.10 :0.0050 -0.0050 -10 SP-7-8 - 122&215 -0.10 - <OW1 <.0050 -0.0050 <W53 - :00050 -0.020 -0.11 -.0000 eoD050 -0.10 -0.0050 :0.150 :10 SP-&10 - 1228215 <.10 - -0.11 -0.11 -0.0050 -0.0050 - -0.0050 <.020 <.WW -O.00W <.W50 :0.10 -0.0050 :0.1X)50 e10 SP-11-12 - 1228215 10.10 - -0.150 <0.0050 -.00.50 <0.0000 - <0.001 :0.020 -0.150 -0.150 <.150 -0.10 10.0050 :0.0050 -10 SP-1314 - 1229215 210 - :0050 0.057 0.13 1.9 - <.025 15.0 -0.025 -IyW5 <0.025 00 -0.025 -0.025 :10 SP-1518 - 132006 840 - 11.0 1.5 3.7 2B <,W 111 <.50 <.50 <.1 121 -0.50 <.50 15 SP-19-22 - 13201 820 - -0.25 0.74 3.5 2] - <.12 -26 -0.12 -0.12 <0.12 -50 <0.12 10.12 <10 SWP1 - 11/11218 <0.50 - <.0010 -0.0010 -0.110 <'W10 <.W10 -.010 <OW1 -00020 <.0020 <.10 -0.110 -0.110 5.28 plane' l TPH-GRO=Taal petroleum hydrocarbons quantified as gasoline range organics•Desertification a arknam hydroortesal in the sample based upon the specified standard TPH-DRO=Taal POnsieum hydrocarbons quantified as diesel range organks MTBE=Methyl tertiary butyl elver TBA=Tel butyl alcohol DRE=Di-isopropyl emer ETBE in Ethyl bursary butyl elver TAME=Tertiary amyl methyl ether 1,2-DCA=1,2 Dkhloroethene EDB=1,2-Dibromoethane -=Not analtesomot applicable mglkg=milligram per kilogram Exca aced=Soil samples aver-excavated during underground storage tank(UST,dispenser island,and/or as kea h d piping removal activities. IW¢eveited'ad'sample co a entration above assocated LTC ani ESL Notes. 1=LowThreat UST Case Closure Policy(LTC),Table 1,Concentrations of Petroleum Constituents in Soil That Will Have No Significant Risk of Advemly,AReclmg Human Health. Naphthalene and polyaromakc hydrecarbons(PAH)have not been analyeud for the sal samples collected. 2=California Regional Water Duality Control Board,Central Valley Region Environments)Sneering Levels(ESL),Tables A-1 and G1.Muy 2013. 595 Table 1-Soil AnaMical.xle Pill 5 of 5