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TABLE 1 DETECTED HALOGENATED VOLATILE ORGANIC COMPOUNDS 1999-2000 CPT INVESTIGATION Pioneer Americas Inc.,Tracy, California EPA Method 82606 Sample Sample Sample Sample Carbon Location Depth'" Horizon ID Date Tetrachloride Chloroform 1,2-DCP CPT A 32-35 Upper CPT-A-1 11/16/00 ......<0.0005 ...<0.005 0.0016 47-50 Middle CPT-A-2 11/16/00 <0.0005 0.0038 0.0086 .... ........ 82-85 Lower CPT-A-3 11/16/00 <0.0005 0.0013 <0.0005 CPT B 18.5-21.5 Upper CPT-B-1 11/17/00 .<0.0005 .....<0:005 0:0024 43-47 Middle CPT-B-2 11/17/00 <0.0005 0:0014 0.0024 ..... ......... ........ .... 67-71 Lower CPT-B 3 11/17/00 <0.0005 <0.0005 <0.0005 CPT C 27-31 Upper CPT-C 1 11/16/00 <0:0005 ...0.011 0:0019 27-31 Upper DUP-1 11/6/00 <0.0005 0 012 0 0020 .................. 47-50 Middle CPT-C-2 11/16/00 <0.0005 0:0062 0:0097 76-80 Lower CPT-C-3 11/16/00 <0.0005 0.012'j- 0.0051 USEPA Primary MCL 0.005 0.1 0.005 USEPA Secondary MCL 0.0005 0.1 0.005 DHS Primary MCL DHS Secondary MCL Notes: 1. 1999 Analyses conducted in accordance with the U.S. Environmental Protection Agency Method 8010. 2. Sample Depth in feet below ground surface. 3. 1,2-DCP= 1,2 Dichloropropane 4. 2000 Analyses conducted in accordance with the U.S. Environmental Protection Agency Method 8260B. 5. Only detected compounds are listed in this table. 6. Results and water quality goals are reported in milligrams per liter(mg/1). 6. <= not detected at or above indicated laboratory analytical reporting limit(mg/1). 7. Water Quality Goals: Primary MCLs=Primary Maximum Contaminant Levels established by the US Environmental Protection Agency(US EPA) or California Department of Health Services(DHS). Drinking water standards derived from health-based criteria. Enforceable standards that may be applied to groundwater and surface water. (Compilation of Water Quality Goals, Central Valley, RWQCB, March 1998.) Secondary MCLs=Secondary Maximum Contaminant Levels established by the US EPA or DHS. Drinking water standards based on human welfare considerations(i.e.,taste, odor, laundry staining). Enforceable standards that may be applied to groundwater and surface water. (Compilation of Water Quality Goals, Central Valley, RWQCB, March 1998.) 8. Bold results exceed Water Quality Goals. 9. Blank cell denotes no water quality goals listed in reference document. (Compilation of Water Quality Goals, Central Valley, RWQCB, March 1998.) Work Plan 2001 Tablet Page 2 of 2 SECOR International,Inc.