ARCHIVED REPORTS_SECOND SEMIANNUAL AND 2011 ANNUAL GROUNDWATER MONITORING REPORT

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Table C.2 Historical Groundwater Concentration Data SFPP, LP-HOLT SITE �I SAMPLING TPH-E TPH-P BENZENE TOLUENE ETHYL- TOTAL BENZENE XYLENES COMMENTS E DATE (DRO) (GRO) Without Silica Gel (M/DIY) (mg/L) (m9/1-) (ug/L) (ug/L) (ug/L) (ug/L) N-16 03/06/08 0.8r 10 2,700 17 100 70 N-16 09/10/08 0.38 x 6.4 610 7.4 53 76 N-16 03/12/09 0.53 3.1 84 2.3 47 18 N-16 09/03/09 <0.50 1.0 43 0.89 11 4.6 N-16 03/09/10 <0.50 <0.50 33 1.6 22 8.8 N-16 09/08/10 <0.50 1.6 49 1.5 15 4.9 N-16 03/02/11 0.53 1.6 12 0.85 6.2 1.5 N-16 09/01/11 2.0 1.9 30 0.88 7.3 1.5 J N-17 03/06/08 12' 7.9 2,800 <25 47 <2& J N-17 09/10/08 1.7 5.1 1,000 10 28 19 N-17 03/12/09 1.8 1.8 110 <2.5° 14 31 N-17 09/03/09 <0.50 1.1 21 1.2 1.9 4.0 N-17 03/09/10 1.5 2.8 92 <2.5° 22.0 27.0 N-17 09/08/10 1.4 3.2 120 2.4 26 6.0 N-17 03/02/11 0.52 1.5 19 1.1 3.0 8.1 N-17 09/01/11 1.0 2.3 100 1.4 8.6 9.9 N-18 03/05/08 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-18 09/09/08 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-18 03/11/09 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-18 09/02/09 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-18 03/09/10 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-18 09/08/10 c0.50 <0.50 1.5 <0.50 <0.50 <0.50 N-18 03/02/11 <0.50 0.52 16 0.94 0.51 1.6 N-18 03/21/11 <0.50 <0.50 11 <0.50 <0.50 0.83 Resample from 3/2/11 N-18 06/01/11 <0.50 <0.50 12 0.59 <0.50 0.93 Quarterly Sample N-18 09/01/11 <0.50 0.66 29 1.2 0.60 2.0 N-19 03/05/08 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-19 09/09/08 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-19 03/11/09 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-19 09/02/09 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-19 03/09/10 <0.50 <0.50 0.54 <0.50 <0.50 <0.50 N-19 09!08/10 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-19 03102/11 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-19 09/01/11 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-20 03/05/08 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-20 09/10/08 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-20 03/11/09 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-20 09/02/09 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 J N-20 03/09/10 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-20 09/08/10 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-20 03/02/11 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 , N-20 09/01/11 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 ,J N-24 03/05/08 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-24 09/10/08 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-24 03/11/09 <0.050 <0.050 <0.50 <0.50 <0.50 <0.50 N-24 09/02/09 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-24 03/09/10 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-24 09/08/10 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-24 03/02/11 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 N-24 09101111 0.53°L <0.50 2.7 <0.50 <0.50 <0.50 file: Appendix_C_Historical_Data.xlsx\Sample Table2 Page 2 of 3