ARCHIVED REPORTS_SEMI-ANNUAL GROUNDWATER MONITORING REPORT AUGUST 2010

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ameec(91 TABLE 3 GROUNDWATER ANALYTICAL RESULTS - FRENCH CAMP FACILITY Well TPH-Diesel Total Cr Dissolved Cr Dissolved Cr VI Identification Sample ID Date Sampled Method 8015M Method 6010 Method 6010 Method 7199 Units pg/L pg/L µg/L Pg/1 CDPH MCL --- 50 50 50 RWQCB WQG 100 50 50 50 FCW-2 FC-D-051509 05/15/09 <50 17 14 15 (cont.) FCW-2 11/24/09 <50 11 12 13 FC-D-112409 11/24/09 <50 12 12 14 FCW-2 08/26/10 <50 12 12 10 FC-D-082610 08/26/10 <50 13 12 10 FCW-3 FCW-3 03/26/02 <50 10 8 J 7.6 FCW-3 06/20/02 <50 9 J 8 J 8.0 FC-D-062002 06/20/02 <50 10 9 J 8.0 FCW-3 09/20/02 <50 40 1 30 8.6 FCW-3 11/18/02 <50 20 20 6.1 FC-D-111802 11/18/02 <50 20 20 6.6 FCW-3 05/07/03 <50 50 40 29 FCW-3 11/06/03 <50 72/11 G1 9 J 8.7 FCW-3-051804 05/18/04 <50 20 20 12 FCW-3 11/22/04 <50 20 10 13 FCW-D-041122 11/22/04 <50 20 10 13 FCW-3 06/16/05 <50 40 40 40 FCW-3 11/18/05 <50 33 33 31 FCW-3 05/03/06 <50 72 73 70 FCW-3 06/08/06 NA 73170 G2 70/70 G2 79 FC-D-060806 06/08/06 NA 77 73 78 FCW-3 11/16/06 <50 60 54 66.6 J1 FCW-3 05/22/07111 1 <50 108 84.8 102 FCW-3121 11/16/07 <50(2) 54 52 60 FCW-3 05/14/08 <50 67 67 38 FCW-3 11/25/08 <50 30 42 24 FCW-3 05/15/09 <50 33 64 69 FCW-3 11/24/09 <50 15 23 29 FCW-3 08/26/10 <50 49 32 27 Reporting Limit 50 10 10 0.5 Method Detection Limit --- 3 3 0.2 Notes: 1.Analysis conducted by Agriculture and Priority Pollutants Laboratories,Inc.(APPL,Inc.)in Clovis,California. 2.The TPH-Diesel resample for FCW-3 was collected by Geomatrix on December 11,2007. TPH-diesel=Diesel range total petroleum hydrocarbons. Cr=chromium. Cr VI=hexavalent chromium(or chromium VI). pg/L=micrograms per liter. CDPH MCL=California Department of Public Health Maximum Contaminant Level for Cr in drinking water. WQG=Water Quality Goal,Central Valley Regional Water Quality Control Board(RWQCB). <=not detected at or above the Reporting Limit(RL)or Method Detection Limit(MDL). J=estimated concentration between the RL and MDL. J1 =estimated value;samples were analyzed outside the holding time for Cr VI by the laboratory. G=Sample was reported by URS to be cloudy and the initial reported analytical result for Total Cr was 65 pg/L. Due to turbidity,the sample was filtered through 47 mm glass fiber filter prior to digestion and reanalysis. Total Cr concentration after reanalysis was reported at 15 pg/L. G1=Sample was reported by URS to be cloudy and the initial reported analytical result for Total Cr was 72 pg/L. Due to turbidity,the sample was filtered through 47 mm glass fiber filter prior to digestion and reanalysis. Total Cr concentration after reanalysis was reported at 11 pg/L. G2=Well was resampled on June 8,2006. After the initial results were obtained,sample was filtered through 47 mm glass fiber filter prior to digestion reanalysis. Total Cr and dissolved Cr concentration after reanalysis were similar to the initial analysis. W=weathered diesel or other petroleum hydrocarbons with higher boiling points. Bold=concentrations exceed screening criteria. Listed data before June 2005 are from the URS Semi-Annual Groundwater Report(November 2004 and December 2004). AMEC Geomatrix, Inc. PA10626.000.0\Docs\Semi-Annua1 Groundwater Monitoring&Sampling\Semi-Annual 1-10\Table 3 Page 2 of 2