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Table A-Historical Groundwater Monitoring Data B T E X MTBE Other TPH-G TPH-D,K,MO Ground Oxygenates Water DTW Elevation Detection limits: 0.5 0.5 0.5 1.0 0.5 0.5-13 50 50-500 Monitor Well(TOC) DATE µg1L Ng1L Ng1L µg1L µg1L µ81L µg/L ug11' MW-I(17.42) 12/19/01 <0.5 0.6 <0.5 <1.0 <0.5 ND <50 ND 37.56 -20.14 6/28/02 <0.5 <0.5 <0.5 <1.0 <0.5 ND <50 ND 37.16 -19.74 9/11102 <0.5 <0.5 <0.5 <1.0 <0.5 ND <50 ND 39.04 -21.62 12/27102 <0.5 <0.5 <0.5 <1.0 <0.5 ND <50 ND 39.87 -22.45 3113103 <0.5 <0.5 <0.5 <1.0 <0.5 ND <50 ND 38.90 -21.48 8110104 <0.5 <0.5 <0.5 <1.0 <0.5 ND <50 80(TPH-D) 41.31 -23.89 11/10/04 <0.5 <0.5 <0.5 <l.0 <0.5 <0.5-20 <so ND 42.71 -25.29 MW-2(17.59) 12/18!01 0.5 1.0 <0.5 <1.0 <05 4.3(1,2-DCA) 150 ND 37.64 -20.05 6128/02 <0.5 <0.5 <0.5 <1.0 <0.5 3.3(l,2-DCA) <50 ND 37.38 -19.79 9/11/02 <0.5 0.5 <0.5 <1.0 <0.5 2,5(1,2-DCA) 100 ND 39.30 -21.71 12/27102 0.8 2.5 1.1 t.3 <0.5 2.0(1,2-DCA) 210 ND 39.98 -22.39 3/13/03 0.7 1.7 1.9 2.9 <0.5 1.9(t,2-DCA) 240 230(THP-D) 39.05 -21.46 550(TPH-MO) 8110/04 <0.5 <0.5 0.9 <1.0 <0.5 2.5(1,2-DCA) 110 NA 4L65 -24,06 11/11104 <0.5 <0.5 0.9 1.0 <0.5 2.1(1,2-DCA) 220 NA 42.97 -25.38 MW-3(17.16) 12/18101 2.8 t.5 1.6 4.5 82 54(TBA) 210 ND 37.38 -20.22 71(1,2-DCA) 6128102 4.7 1.3 3.7 4.6 190 93(1,2-DCA) 480 ND 37.02 -19.86 9/11102 5.0 0.7 5.5 4.9 160 74(1,2-DCA) 680 350*(TPH-D) 38.92 -21.76 12/27/02 2.9 2.2 1.3 11 75 40(1,2-DCA) 610 540(TPH-K) 39.63 -22.47 3113/03** 8.6 1.4 5.6 12 85 41(1,2-DCA) 930 220(TPH-D) 38.75 -21.59 l.2(TAME) 81t0l04 ll <0.5 5.0 3.2 70 140(1,2-DCA) 640 490*(TPH-D) 41.23 -24.07 29(TBA) L4(TAME) 130(TPH-D) 11/10104 6.2 <0.5 2.5 1.9 83 160(1,2-DCA) 510 320* 42.60 -25.44 33(TBA) ("rPH K) All Water Level Measurements and Groundwater Elevations Are In Feet. TOC=top of casing. Units:gg/L=parts per billion BTEX=benzene,toluene,ethyl benzene,total xylenes TPH-G=total petroleum hydrocarbons,quantified as gasoline TPH-D,K,MO=total petroleum hydrocarbons quantified as diesel(D),kerosene(K),or motor oil(MO) MTBE=methyl tert-butyl ether Other oxygenates include tertiary-butanol (TBA), di-isopropyl ether (RIPE), ethyl tertiary butyl ether (ETBB), tertiary-amyl methyl ether (TAME), 1,2-Dichloroethane(1,2-DCA),1,2-Dibromoethane,and ethanal.See laboratory results for detection limits of individual compounds ND=not detected at or above the laboratory reported detection limits NA=Sample not analyzed for this constituent *=the sample chromatogram does not match the standard chromatogram and the result is an estimated value **=high surrogate recovery for TPH-G and BTEX due to matrix interferences P:13000-prj\3024 CSUS-Multi-CampuslQMR12004 AugustlHistorical Data Table.doc