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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 DT'W Elevation Detection limits: 0.5 0.5 0.5 1.0 0.5 0.5-13 50 50-500 Monitor We11(TOC) DATE µg/L Ag/L µg/L }ig/L 4L µg/L Kg/L µg/L MW-1(17.42) 12/18101 <D.5 0.6 <0.5 <LD <0.5 ND <50 NO 37.56 -20.14 6128102 <.0.5 <0.5 <0.5 <l.0 <0.5 NO <5o ND 37.16 -19.74 9111102 <0,5 <0.5 <0.5 <1.0 <0.5 NO <50 NO 39.04 -21.62 12/27/02 <0.5 <0.5 <0.5 <1.0 <0.5 NO <50 NO 39.87 -22.45 3/13103 <0.5 <0.5 <0.5 <LO <0.5 NO <50 NO 38.90 -21.48 8/10104 <0.5 <0.5 <0.5 <1.0 <0.5 NO <50 80(TPH-D) 41.31 -23.89 MW-2(17.59) 12/18/01 0.5 1.0 <0.5 <1.0 <0.5 4.3(1,2-DCA) 150 NO 37.64 -20.05 6/28102 <0.5 <0.5 <0.5 <Lo <0.5 3.3(1,2-DCA) <50 ND 37.38 -19.79 9111/02 <0.5 0.5 <0.5 <1.0 <CiL 2.5(1,2-DCA) 100 NO 39.30 -21.71 12/27102 0.8 2.5 1.1 1.3 <0.5 2.0(4,2-DCA) 210 NO 39.98 -22.39 3113103 0.7 1.7 L9 2.9 <0.5 1.9(t,2-DCA) 240 230(THP-D) 39.05 -21,46 550(TPH-MO) 8/10/04 <0.5 <0.5 0.9 <1.0 <0.5 2.5(1,2-DCA) I 1 0 NA 41.65 -24.06 MW-3(17.16) I211a101 2.8 1.5 L6 4.5 82 54(TBA}71(1,2-DCA) 210 ND 37.38 -20.22 6/28102 4.7 1.3 3.7 4.6 190 93(1,2-DCA) 4a0 ND 37.02 49.86 9111/02 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 1.2(TAME) 8/10/04 1 11 <0.55.0 3.2 70 140(1,2-DCA) 640 490*(TPH-D) 41.23 -24.07 29(TBA) All Measurements Are In Feet-Elevations Are In Feet Above Mean Sea Level. TQC=top of casing. Units: pg(L=parts per billion Analytical: 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(DIPS),ethyl tertiary butyl ether(ETBE),tertiary-amyl methyl ether (TAME), 1,2-Dichloroethane (1,2-DCA), 1,2-Dibromoethane, and ethanol. 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 diesel chromatogram and the result is an estimated value **=high surrogate recovery for TPH-G and BTEX due to matrix interferences . P:13000_pd\3024 CSUS-Multi-Campus\QMR12004 August\Historical Data Table.doc