The detection limit for tritium is 300 pci/l

Transcription

1 New Jersey Department of Environmental Protection - Bureau of Nuclear Engineering (BNE) Investigation of Found in Onsite Vault Background and Installation of Groundwater Monitoring Wells In April of 009, during a planned cable replacement within an onsite cable vault, plant workers at the Oyster Creek Nuclear Generating Station (Oyster Creek) discovered water within the vault. Plant policy is to sample any water collecting onsite in vaults, excavation trenches, and buildings for radioactivity. As a result, sampling of the water that had collected within the vault indicated 0,000 picocuries per Liter tritium. Subsequent to this discovery, 4.5 million pci/l of tritium was detected in an existing, onsite groundwater monitoring well (Well MW-5K-A). Five additional groundwater wells (Wells MW-50, MW-5, MW-5, MW-53, and MW-54) were installed and sampled in the vicinity of the underground cable vault. Existing groundwater monitoring wells were sampled (Wells MW-I-A, MW- I-A, W-, W-C, W-K, W-5C, W-5K, W-3, W-4, W-5 and W-6). These wells are part of Exelon s ongoing voluntary Radiological Groundwater Protection Program (RGPP). As part of Exelon s investigation, they discovered two active pipe leaks. The underground portion of these pipes was replaced during April and May 009. Following this discovery, other nearby pipes underwent pressure testing or excavated and visually inspected and no leakage was found. The inspection of a one-inch stainless steel pipe near the Condensate Storage Tank (CST) was completed in July 009. No leak was detected. In May 009, divers completed an underwater inspection of the inside of a large tank containing water with tritium. This inspection concluded that the tank was not leaking. A pumping well, designated W-55, was installed in May, close to the existing well W-50, in order to conduct a pump test to evaluate hydrogeologic parameters and groundwater flow rates. In August 009, Exelon discovered water leaking into a sump inside the Turbine Building. An investigation revealed that a sixinch aluminum pipe was leaking at the location where the pipe enters through the Turbine Building wall underground. The leaking water had elevated levels of tritium. Exelon made a 4-hour report to the DEP hotline, since some of this water had leaked outside of the building. The leak was stopped and the section of pipe with the leak was replaced. Based on reviews of groundwater elevation and tritium sampling results, additional groundwater monitoring wells were needed in order to better define the groundwater flow paths and the potential for migration of tritium. In September 009, Exelon installed monitoring wells in the Cohansey Formation to assess the potential for vertical migration of tritium from the Cape May Formation into the Cohansey. One well (MW-56I) was installed in the area near existing well MW-5K-A. The second well (MW-57I) was installed east of the Intake Structure in the area of the April 009 leak. A map showing sample locations is available for download here. In March of 00, Exelon completed the drilling of four (4) additional wells in the Cape May Formation (MW-6, MW-64, MW-65, and MW-67) and one () well in the Cohansey Formation (MW-59I) in order to further characterize the groundwater movement in the area. One Cape May well (MW-64) was installed alongside the existing Cohansey well MW-57I. A second well (MW-65) was installed north of existing well W-50 between it and the existing RGPP wells W-5 and W-6. The other two new Cape May wells were installed closer to the CST. One new well (MW-6) is located near the aforementioned oneinch stainless steel pipe near the CST (northwest corner of the Turbine Building). The other new well (MW-67) was installed between the west wall of the Turbine Building and the CST, north of the concrete

2 vault. Wells MW-6 and MW-67 are located in the vicinity of the April 009 release. The newlyinstalled Cohansey Formation well designated MW-59I is co-located with Cape May well, MW-65. In June 00, the DEP and Exelon agreed that additional groundwater monitoring wells were needed in the intermediate and deep Cohansey Formation to further delineate the horizontal and vertical extent of the tritium plume in the Cohansey Formation. As a result, eight (8) new groundwater monitoring wells were installed during June 6 through July 6, 00. Four of the wells (MW-58I, MW-6I, MW-66I and MW-69) were installed in the intermediate Cohansey Formation and four wells (MW-60I, MW-63I, MW-68I and MW-70I) were installed in the deep Cohansey Formation. All of the wells were installed near existing shallow Cohansey and Cape May Formation wells, essentially forming four (4) clusters of wells. Each well cluster includes a shallow, intermediate, and deep Cohansey Formation well along with a Cape May Formation well. The depth of each well is noted on the corresponding table of results. A map showing the locations of the cluster wells is available for download here. In early July 00, two new wells, designated MW-7 and MW-7, were installed in the Cape May Formation. The wells were installed in close proximity to several plant-related system underground pipes/vaults that potentially contain radionuclides (including tritium). Well MW-7 is located along the southwest corner of the Reactor Building near the recently renovated underground piping vault. Well MW-7 is located just north of the Reactor Building. On September 8, 00, a remedial pumping well (MW-73) was installed near the center of the defined shallow Cohansey onsite tritium plume. This well is located on the south side of the circulating water discharge tunnel. It extends into the upper Cohansey Formation, approximately 55-feet deep. It was installed in accordance with a directive issued by the DEP on May 7, 00 that directs Exelon to clean up and remove the discharge of tritium at the Oyster Creek Nuclear Generating Station. A copy of the directive is available for download here. Since November 7, 00, MW-73 has pumped at an approximate rate of 70 gallons per minute. With DEP approval, Exelon is pumping groundwater from remedial well MW-73, continuously measuring the concentration of tritium in the extracted groundwater, and discharging it into the plant s cooling water intake structure in order to reduce the tritium concentration. After being discharged to the plant s intake structure, the extracted groundwater is combined with up to 460,000 gallons of water per minute and pumped through the plant s circulating water system. Up through January 08, 0 million gallons of groundwater have been extracted from pumping well MW-73 and discharged to the plant s intake structure. The BNE is presently receiving weekly split samples from remedial pumping well MW-73. Since pumping of well MW-73 began, tritium concentrations in groundwater monitoring wells, located in the Cape May and Cohansey Formations, have decreased significantly, as indicated by the following DEP split sampling results. The detection limit for tritium is pci/l. MW-5K-A: Highest Reading:,795,335 pci/l Latest Reading: < 37 pci/l MW-50: Highest Reading:,83,074 pci/l Latest Reading: < 43 pci/l MW-55: Highest Reading:,47,70 pci/l Latest Reading: < 44 pci/l MW-56I: Highest Reading:,,800 pci/l Latest Reading:,00 ± 8 pci/l MW-57I: Highest Reading: 76,976 pci/l Latest Reading: 855 ± 73 pci/l MW-67: Highest Reading:,70,000 pci/l Latest Reading: 460 ± 3 pci/l The detection limit for tritium is pci/l

3 At this time, there is no estimate for when the remediation of the entire plume will be completed, however DEP s split sampling results to date indicate that the remedial efforts are having some effect. In addition to monitoring the concentrations of tritium being discharged from the pumping well, Exelon has revised or created new site procedures for the pumping system to ensure that discharge of any extracted groundwater, and evaluation of the impact of discharged groundwater, is done in accordance with U.S. Nuclear Regulatory Commission (NRC) federal regulatory requirements. Liquid (and gaseous) effluent discharges from Oyster Creek are reported to the DEP on a monthly basis. This information is also reported to the NRC on an annual basis in the licensee s Annual Effluent Release Report (the Effluent Report ), available through the NRC website s public library at or at any branch of the Ocean County Public Library. Monitoring and Data Reporting Exelon continues to collect groundwater and surface water samples for tritium analysis to assess the extent and migration of the exiting tritium plumes and to ensure that the tritium levels decrease. The BNE receives splits of these samples for an independent analysis of tritium and gamma emitting radionuclides by the BNE s radiological contract laboratories. Table represents BNE results obtained from split samples of Exelon s onsite groundwater monitoring wells. BNE split sample results from early May 00 through mid-june 00 are not available due to the shutdown of the BNE s Radiological Contract Lab, Centauri Labs, of Montgomery, Alabama on June 9, 00, with no prior notification to the BNE. For this time period, split sample data from Exelon s contract laboratory, Teledyne Brown Engineering, Inc., (Teledyne) have been reported in Table. Immediately following the closing of Centauri Lab s Montgomery lab facility, two short term purchase orders for radiological lab services were consecutively awarded to Eberline Services (Eberline) of Oak Ridge, Tennessee and GEL Laboratories (GEL) of Charleston, South Carolina. Following the expiration of these PO's, a longer-term contract (Waiver of Advertising) was awarded to GEL, on January 0, 0, under the state procurement process. The waiver served as an interim measure (approximately 9 months) while a Request for Proposal (RFP) was developed and put out for open competitive bidding as a multiyear term contract. In August 00, following the shutdown of Centauri Labs, the U.S. Environmental Protection Agency s (EPA) National Air and Radiation Monitoring Laboratory (NAREL) in Montgomery, Alabama, offered to analyze the BNE s split surface water samples for tritium while the BNE secured radioanalytical lab services under the waiver. This is noted on Table (Surface Water). Additional details with regard to the NAREL facility can be found at their website, On October 4, 0, the BNE's three-year term contract for Radiological Environmental Lab Services was awarded to GEL. As the sole contractor, GEL is analyzing all of the BNE's sampling media. s reported in Table were analyzed for tritium and/or gamma emitting radionuclides. No gamma emitting radionuclides have been found. The depth of each well along with the associated groundwater aquifer designation is indicated on Table. Based on the groundwater monitoring wells currently installed in the Cape May and Cohansey Formations, the tritium being detected has not migrated beyond the immediate vicinity of the onsite pipe leaks. No tritium has been detected in any groundwater wells monitored offsite or through the licensee s RGPP. Information on Exelon s RGPP can be found in the licensee s Annual Radiological Environmental Operating Report (the Environmental Report ) available through the U.S. Nuclear Regulatory Commission s website at

4 or at any branch of the Ocean County Public Library. General information on the Oyster Creek Project can be found on Exelon s public website at Exelon groundwater monitoring well split sample data from 009 through the present can be viewed in the licensee s Annual Environmental Monitoring Report, available through the NRC website s public library at Table represents BNE results from split samples of surface water obtained from the plant s intake canal: the main condenser discharge sampling point: and in the discharge canal located at the Route 9 Bridge, which represents the nearest public access point. The DEP s split sample results for tritium and/or gamma emitting radionuclides indicated no activity. A surface water sample taken from the intake canal by Exelon on June, 009 indicated 6,600 pci/l of tritium activity. The DEP did not receive a split of this sample for analysis. The level of tritium activity detected in the intake canal was below the New Jersey Groundwater Quality Standards limit of pci/l and poses no threat to public health and safety. The New Jersey Groundwater Quality Standards are the same as the New Jersey Surface Water Quality Standards and the EPA s drinking water standards for radionuclides. Table 3 represents BNE results obtained from split samples of soil core borings during the installation of the groundwater monitoring wells, MW-50 through MW-55, MW-58I, MW-59I, MW-60I, MW-6, MW- 63I, MW-64, MW-65, MW-66I, MW-67, MW-68I, MW-69I, MW-70I, MW-7, and MW-73. Sampling has shown no detectable levels of gamma emitting radionuclides in any of the soil cores. The DEP will be receiving split soil samples of any additional wells that are installed and will post this data as it becomes available. Throughout the investigation of tritium found onsite at Oyster Creek, BNE staff will continue to participate in ongoing inspections with Exelon and the NRC. Additional information on tritium in groundwater at nuclear power plants can be found at the NRC website address at: Revised: 03/06/8

5 BNE Split Results Table : Groundwater Monitoring Wells MDA NJGWQS MW-5K-A 8.5 Cape May 04/7/09,467,85 ± 4,0 09/5/09 7,50 ± /0/09,358,090 ± 3,003 09/8/09 65,840 ± 74 04/9/09,753,467 ± 4,904 09/30/09 67,80 ± 73 05/0/09,795,335 ± 4,980 0/0/09 60,90 ± /06/09,478,67 ± 4,66 0/07/09 60,630 ± /3/09,304,093 ± 3,40 0/4/09 4,470 ± /0/09 776,787 ±,64 0//09 49,590 ± 65 05/8/09 45,406 ±,007 0/9/09 39,660 ± /0/09 3,30 ±,650 /04/09 3,760 ± /09/09 46,670 ± 658 //09,50 ± 38 06/6/09 63,90 ± 755 /8/09 6,630 ± /3/09 57,60 ± 78 /4/09 6,460 ± /0/09 43,050 ± 63 /0/09 7,400 ± /07/09 48,660 ± 668 /08/09 46,460 ± 6 07/5/09 56,380 ± 666 /5/09,640 ± 44 07//09 65,30 ± 73 //09 4,450 ± /9/09 98,550 ± 868 /9/09 7,360 ± /05/09 94,040 ± 848 0/05/0 8,60 ± //09 48,750 ± 69 0//0 7,40 ± /9/09 35,550 ± 536 0/9/0 9,030 ± 49 08/5/09 4,750 ± 583 0/6/0 37,340 ± /8/09 48,070 ± 65 0/0/0 3,660 ± /3/09,030 ± 957 0/09/0 3,480 ± 44 09/08/09 68,550 ± 79 0/6/0 3,560 ± 3 09/09/09 97,90 ± 866 0/4/0,940 ± 00 09/8/09 08,690 ± 95 03/0/0,670 ± 97 09//09 9,940 ± /09/0 3,40 ± 0 09/3/09 77,890 ± /6/0,70 ± Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

6 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-5K-A 8.5 Cape May 03/3/ ± 56 09//0,900 ± 38 (continued) 03/3/0 4,30 ± 5 09/8/0 9,950 ± /06/0 5,370 ± 7 0/3/0 85 ± 64 04/4/0 4,50 ± 36 0/7/0,40 ± 34 04/0/0 7,30 ± 70 /0/0,0 ± 38 04/7/0 9,600 ± 308 /0/0 3,470 ± /04/0,800* /4/0 6,80 ± 90 05//0 7,390* 0// 46,000 ± /9/0 9,360* 0/5/ 0,00 ± /5/0 8,00* 03/5/ 0,000 ± /0/0 4,70* 04/3/ 4,500 ± /08/0 6,0* 05/0/ 9,70 ± /5/0 4,770* 06/4/ 8, ± //0 3,884 ± /3/ 4,370 ± 48 06/30/0 3,666 ± /6/,450 ± 96 07/07/0 5,849 ± /3/,670 ± 94 07/3/0 6,47 ± 445 0//,480 ± 8 07//0 8,59 ± 49 /6/,450 ± 7 07/7/0 7,6 ± 47 /4/ 557 ± 44 08/04/0 8,87 ± 483 0/8/ 84 ± 83 08//0 8,73 ± 493 0/4/,30 ± 7 08/8/0 9,46 ± /3/ < 3 08/4/0 0,700 ± /8/ 4,0 ± 44 09/08/0 9,400 ± /5/ < 5 *BNE split sample results from 05/04/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

7 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-5K-A 8.5 Cape May 06/0/ < 68 0/8/6 < 4 (continued) 07/03/ < 58 0/0/7 < 4 08/5/ < 63 04/05/7 < 0 09/9/ < 97 07//7 < 36 0/0/ < 73 0/7/7 < 4 /4/ < 4 0/8/8 < 37 /05/ < 7 0/08/3 < 0 0//3 < 6 03/05/3 < 76 04/09/3 < 7 07//3 < 63 0/08/3 < 59 0/3/4 < 85 04/09/4 < 09 07/5/4 < 58 0/4/4 70 ± 58 0/3/5 < 6 04/4/5 < 38 07/5/5 < 7 0/3/5 < 6 0/0/6 < 60 04/05/6 < 0 07/9/6 < 3 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

8 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 04//09,83,074 ± 4,349 09/8/09 6,0 ±,60 04/9/09,4,7 ± 4,44 09/30/09 477,00 ±,890 05/06/09,05,065 ± 4,87 0/0/09 565,00 ±,050 05/3/09,9,943 ± 4,53 0/07/09 39,60 ±,70 05/0/09,97,053 ± 4,9 0/4/09 30,340 ±,550 05/8/09,587,4 ± 3,80 0//09 366,750 ±,660 06/0/09,90,60 ± 3,30 0/8/09 37,940 ±,00 06/09/09,775,50 ± 3,940 /04/09 85, ±,450 06/6/09,608,80 ± 3,890 //09 7,690 ±,430 06/3/09,559,0 ± 3,680 /8/09 343,80 ±,60 07/0/09,6,650 ± 3,70 /4/09 333,790 ±,580 07/07/09 940,90 ±,860 /0/09 353,550 ±,630 07/5/09,094,690 ±,850 /08/09 374,360 ±,670 07//09 94,0 ±,640 /5/09 07,30 ±,50 07/9/09 909,470 ±,600 //09 74,40 ±,430 08/05/09 980,50 ±,690 /9/09 44,980 ±,350 08//09 80,90 ±,460 0/05/0 59,840 ±,40 08/9/09 56,00 ±,040 0//0 57,0 ±,40 08/5/09,45,40 ±,90 0/9/0 73,830 ±,430 08/8/09 866,00 ±,530 0/6/0 7,30 ±,40 08/3/09,600,500 ± 3,440 0/0/0 386,0 ±,670 09/08/09,070,50 ±,80 0/09/0 363,060 ±,60 09/09/09,074,50 ±,830 0/6/0 388,700 ±,670 09/6/09 88,0 ±,480 0/4/0 07,050 ±,30 09/8/09 494,480 ±,90 03/0/0 43, ±,00 09//09 67,730 ±,60 03/09/0 86,460 ±,60 09/3/09 634,360 ±,70 03/6/0 34,80 ± /5/09 65,0 ±,00 03/3/0 80,000 ±,00 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

9 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 03/3/0 73,000 ±,80 0/06/0 9,000 ±,40 (continued) 04/07/0 53,000 ±,00 0/3/0 46,000 ±,870 04/4/0 76,000 ±,090 0/0/0 4,000 ±,430 04//0 95,800 ± 843 0/7/0 33,000 ±,360 04/8/0,000 ±,60 /03/0 5,000 ±,30 05/04/0 5,000* /0/0 34,000 ±,640 05//0 6,000* /7/0 5,000 ±,00 05/8/0 75,000* /3/0,000 ±,350 05/6/0 09,000* /5/0 7,000 ±,60 06/0/0 4,000* 0// 83,000 ±,340 06/08/0 87,000* 0/5/ 3,000 ±,40 06/5/0 48,000* 04/3/ 0,000 ±,030 06//0 95,9 ± /0/ 63,00 ±,70 06/30/0 67,085 ± /4/ 65, ±,40 07/07/0 64,79 ± /3/ 5,800 ±,390 07/4/0 84,564 ± 99 08/6/ 99,000 ±,90 07//0 75,7 ± 93 09/3/ 7,700 ±,080 07/7/0 36,00 ± 788 0// 46,400 ± 94 08/04/0 07,94 ± 760 /6/ 50,700 ± 93 08//0 07,404 ± 768 /08/ 44,500 ±, 08/8/0 9,550 ±,87 0/7/ 5,00 ± /4/0 74,000 ± 3,430 0/4/ 54, ±,540 08/3/0 4,000 ±,50 03/3/ 48,900 ± /08/0 83,500 ±,650 04/8/ 36,400 ±,60 09/5/0 3,000 ±,580 05/5/ 3,900 ± //0 44,000 ±,00 06/0/ 0,900 ± /9/0 05,000 ± 4,000 07/03/ 0,00 ± 688 *BNE split sample results from 05/04/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

10 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 08/4/ 3,000 ± 77 0/7/8 < 43 (continued) 09/9/ 6,0 ± 46 0/0/ 9,000 ± 789 /4/ 3,600 ± 780 /05/, ± 640 0/08/3 8,000 ± 94 0//3 7, ± /05/3 8,350 ± 67 04/08/3 8,500 ± /0/3 8,330 ± 366 0/08/3,500 ± 430 0/4/4 4,600 ± /08/4 3,60 ± /5/4 6,70 ± 38 0/4/4 3,080 ± 47 0/3/5 5,980 ± 38 04/4/5 337 ± 54 07/5/5 733 ± 55 0/3/5,990 ± 8 0/0/6 4,440 ± /05/6,350 ± 73 07/9/6 653 ± 58 0/8/6,00 ± 3 0/0/7 < 76 04/04/7 < 07 07/0/7 < 4 0/7/7 < Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

11 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 04/9/09,38,59 ± 4,083 /9/09 3,680 ± 33 05/06/09,8,494 ± 6,463 0/05/0 34,90 ± /3/09,549,98 ± 3,908 0/9/0 99,360 ± 87 05/0/09,84,459 ± 3,470 0/6/0 98,360 ± 86 05/7/09,99,630 ± 4,060 0/0/0 50,990 ± 63 06/0/09,00,40 ± 3,880 0/09/0 95,00 ± 84 06/09/09,356,880 ± 3,440 0/6/0 7,880 ± 88 06/6/09,53,90 ± 3,360 0/3/0 36,930 ± /3/09 535,990 ±,50 03/0/0 7,50 ± 8 07/0/09 78,470 ±,60 03/09/0 5,50 ± /07/09 80,40 ±,640 03/6/0 8,60 ± /5/09,570,800 ± 3,40 03/3/0 9,80 ± 3 07/9/09,555,80 ± 3,390 03/30/0 5,970 ± 78 08/05/09,433,50 ± 3,50 04/06/0 4,500 ± //09 93,0 ±,60 04/3/0 3,00 ± 43 08/0/09 03,960 ±,40 04/0/0 37,500 ± 5 08/6/09 3,630 ±,550 04/7/0 33,800 ± 5 08/3/09 9,80 ±,80 05/04/0 48,600* 09/6/09 47,000 ±,00 05/5/0 37,800* 09/8/09 4,000 ±,30 06/0/0 38,00* 09//09 4,000 ±,80 09/4/ 6,350 ± 9 09/3/09 697,000 ±,360 04/05/7 < 3 09/5/09 76,000 ±,480 09/8/09 744,000 ±,450 BNE split samples between 0/09/09 and //09, 05//0, 05/9/0, 06/08/0 through 08/04/, and 0/4/ through 0/0/7 were not available. The well was reported dry by Exelon. * BNE split sample results from 05/04/0 through 06/0/0 were not available due to the closing of Centauri Labs Alabama facility. For this time-period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

12 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 04/3/09 < 96 /8/09 < 94 04/9/09 < 90 /4/09 < 94 05/3/09 < 83 /0/09 < 94 05/0/09 < 96 /08/09 < 93 05/7/09 < 88 /5/09 < 67 06/0/09 < 77 //09 < 67 06/09/09 < 75 /9/09 < 76 06/6/09,30 ± 09 0/05/0 < 89 06/3/09 < 73 0//0 < 94 06/30/09 < 84 0/9/0 < 90 07/07/09 < 83 0/6/0 < 87 07/5/09 < 78 0/0/0 < 87 07//09 < 78 0/09/0 < 87 07/9/09 < 77 0/6/0 < 84 08/05/09 < 77 0/3/0 < 85 08//09,50 ± 8 03/0/0 < 85 08/9/09 < 66 03/09/0 < 79 08/5/09 < 66 03/6/0 < 73 09/6/09 < 73 03/30/0 < 86 09/3/09 < 73 04/06/0 < 86 09/30/09 < 7 04/3/0 < 67 0/07/ ± 60 04/0/0 < 67 0/4/ ± 60 04/8/0 < 66 0//09 < 48 05/04/0 < 79* 0/8/ ± 60 05//0 < 77* /04/09 < 5 05/8/0 < 53* //09 < 56 05/5/0 < 78* *BNE split sample results from 05/04/0 through 06/6/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

13 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 06/03/0 < 55* /5/ < 80 (continued) 06/09/0 < 68* /4/ < 04 06/6/0 < 5* 0/7/ < 7 06//0 < 6 0/3/ < 3 06/9/0 < 07 03/3/ < 9 07/07/0 < 0 04/7/ < 03 07/3/0 < /5/ < 53 07//0 < /9/ < 60 07/8/0 < /0/ < 57 08/03/0 < /5/ < 70 08/0/0 < /8/ < 90 08/7/0 < 59 0/0/ < 79 08/5/0 < 34 /4/ < 7 09/8/0 < 45 /05/ < 68 0/3/0 < 0/08/3 < 4 /6/0 < 99 0//3 < /4/0 < 4 03/05/3 < 77 0// < 0 04/09/3 < 40 0/5/ < 7 07/09/3 < 63 03/5/ < 84 0/09/3 < 98 04// < 57 0/4/4 < 85 05/0/ < 97 04/09/4 < 09 06/4/ < 8 07/6/4 < 54 07// < 59 0/3/4 < 37 08/6/ < 69 0/3/5 < 6 09/3/ < 04/4/5 < 40 0// < 69 07/5/5 < 09 *BNE split sample results from 05/04/0 through 06/6/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

14 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 0/3/5 < (continued) 0/0/6 < 64 04/05/6 < 03 07/9/6 < 7 0/7/6 < 9 0/0/7 < 43 04/05/7 < 0 07/0/7 < 38 0/0/7 < 0/7/8 < 37 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

15 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 04/4/09,56 ± 98 /04/09 < 50 04/9/09 4,59 ± 6 //09 < 53 05/0/09 7,0 ± 98 /8/09 < 94 05/06/09 6,43 ± 89 /4/09 < 94 05/3/09,54 ± 7 /0/09 < 94 05/0/09,048 ± 0 /08/09 < 93 05/7/09,93 ± /5/09 < 67 06/0/09 76 ± 8 // ± 67 06/09/09 37 ± 7 /9/09 < 76 06/6/09 < 63 0/05/0 < 89 06/3/09 < 73 0//0 < 93 06/30/09 < 84 0/9/0 < 89 07/07/09 < 83 0/6/0 < 87 07/5/09 < 78 0/0/0 < 87 07//09 < 78 0/09/0 < 87 07/9/09 < 77 0/6/0 < 88 08/05/09 < 77 0/3/0 < 89 08// ± 6 03/0/0 < 96 08/9/09 < 66 03/09/0 < 86 08/5/09 < 66 03/6/0 < 7 09/6/09 < 73 03/30/0 < 67 09/3/09 < 73 04/06/0 < 89 09/30/09 < 7 04/3/0 < 66 0/07/ ± 60 04/0/0 < 0 0/4/ ± 67 04/7/0 < 63 0//09 < 49 05/04/0 < 75* 0/8/09 49 ± 56 05//0 < 78* *BNE split sample results from 05/04/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

16 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 05/8/0 < 68* 07//,940 ± 85 (continued) 05/5/0 < 78* 08/6/ 39 ± 33 06/03/0 < 79* 09/3/ < 0 06/08/0 < 68* 0// < 74 06/5/0 5* /5/ < 78 06//0 < 4 /4/ < 0 06/30/0 < 0 0/7/ < 07/08/0 < 0 0/3/ < 80 07/3/0 < 49 03// < 07//0 < /7/ < 00 07/7/0 < /5/ < 53 08/04/0 < /0/ < 76 08//0 < /03/ < 6 08/7/0 < /5/ < 67 08/5/0 < 35 09/8/ < 90 09/8/0 < 47 0/0/ < 75 0//0 < 06 /4/ < 7 /6/0 < 04 /05/ < 68 /4/0 < 07 0/09/3 < 37 0// < 03 0//3 < 09 0/5/ < 78 03/05/3 < 79 03/5/ 33 ± 45 04/09/3 < 33 04// < 53 07//3 < 06 05/0/ < 96 0/08/3 < 60 06/4/ 7,770 ± 503 0/5/4 < 3 *BNE split sample results from 05/04/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

17 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 04/0/4 < 09 (continued) 07/7/4 < 0 0/4/4 < 44 0/3/5 < 58 04/6/5 < 39 07/5/5 < 8 0/4/5 < 3 0//6 < 6 04/07/6 < 03 07/0/6 < 30 0/0/6 < 4 0//7 < 04/05/7 < 97 07//7 < 38 0//7 < 05 0/9/8 < 43 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

18 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 04//09 3,565 ± 34 /04/09 54 ± 63 04/9/09 46 ± 8 //09,0 ± 73 05/0/09 44 ± 56 /8/ ± 94 05/06/09 5,894 ± 85 /4/09 3,390 ± 3 05/3/09 3,65 ± 46 /0/09 5,950 ± 69 05/0/09,40 ± 8 /08/09,60 ± 05/8/09 4,93 ± 70 /5/09 45 ± 69 06/0/09 6,460 ± 94 // ± 75 06/09/09 4,0 ± 54 /9/ ± 74 06/6/09,690 ± 0 0/05/0 49 ± 84 06/3/09 4,000 ± 47 0//0,535 ± 08 06/30/09,950 ± 3 0/9/0,30 ± 00 07/07/09 3,380 ± 39 0/6/0 5,00 ± 53 07/5/09 8,380 ± 98 0/0/0 4,480 ± 43 07//09 6,070 ± 67 0/09/0 3,470 ± 8 07/9/09 5,050 ± 53 0/6/0 0,670 ± 30 08/05/09 3,440 ± 8 0/3/0 759 ± 79 08//09,590 ± 07 03/0/0 < 90 08/9/09 3,00 ± 8 03/09/0,0 ± 83 08/5/09,760 ± 95 03/6/0 < 70 09/6/09,30 ± 8 03/30/0 < 84 09/3/09,860 ± 95 04/06/0 45 ± 80 09/30/09,50 ± 69 04/3/0 47 ± 68 0/07/09,500 ± 8 04/0/0 4,860 ± 38 0/4/09, ± 05 04/7/0,890 ± 94 0// ± 65 05/04/0 550* 0/8/09 55 ± 60 05//0 368* *BNE split sample results from 05/04/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

19 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 05/8/0 < 49* 05/0/ < 98 (continued) 05/5/0 < 79* 06/4/,040 ± 06/0/0 < 80* 07/3/ 350 ± 49 06/09/0 < 00* 08/6/ 97 ± 43 06/5/0 44* 09/3/ < 06//0 < 7 0//,050 ± 08 06/9/0 < 09 /6/ 749 ± 00 07/08/0 < 09 /4/ 47 ± 3 07/4/0 < 473 0/8/ < 44 07//0 < 47 0/4/ 334 ± 50 07/7/0 < 45 03/3/ 73 ± 44 08/04/0 < 48 04/8/ < 08//0 < /6/ < 49 08/8/0 < 58 06/0/ 659 ± 0 08/5/0 304 ± 66 07/03/,060 ± 67 09/08/0 57 ± 4 08/5/ 38 ± 53 09//0 < 5 09/8/ 3,780 ± /8/0 304 ± 6 0/0/ 3,990 ± 374 0/3/0 343 ± 93 /4/ < 5 0/7/0 809 ± 37 /05/ < 68 /0/0 473 ± 65 0/08/3 < 38 /3/0,00 ± 55 0//3 < 06 /4/0 570 ± 50 03/05/3 < 79 0// < 0 04/09/3 < 39 0/5/ < 9 07/0/3 303 ± 66 03/5/ < 83 0/08/3 < 65 04/3/ < 58 0/4/4 < 3 *BNE split sample results from 05/04/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

20 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 04/09/4 < 09 (continued) 07/6/4 0 ± 40 0/4/4 33 ± 6 0/3/5 < 73 04/4/5 38 ± 54 07/5/5 389 ± 43 0/3/5 56 ± 33 0/0/6 < 55 04/05/6 < 08 07/9/6 < 9 0/8/6 < 9 0/0/7 58 ± 37 04/05/7 < 08 07//7 380 ± 54 0/0/7 668 ± 5 0/7/8 < 6 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

21 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 06/0/09,469,959 ± 3,637 /5/09 3,950 ± 53 07/0/09 0,780 ± 996 //09 50,500 ± /9/09 84,070 ±,460 /9/09 0,770 ± 45 08/5/09 667,030 ±,0 0/05/0 3,30 ± 59 08/8/09,47,70 ± 3,90 0//0 6,40 ± 7 08/3/09 75,630 ±,360 0/9/0 5,30 ± /04/09 560,560 ±,040 0/6/0 66,470 ± /08/09 607,780 ±,30 0/0/0 5,680 ± /4/09 35,90 ±,00 0/09/0 6,970 ± /6/09 55,90 ±,080 0/6/0 34,740 ± 5 09/8/09 3,440 ± 978 0/4/0,80 ± //09 5,960 ±,070 03/0/0 4,630 ± 36 09/3/09 73,70 ±,40 03/09/0,60 ± /5/09 0,770 ±,90 03/6/0 3,90 ± /8/09 346,540 ±,60 03/3/0,400 ± /30/09 6,80 ±,80 03/3/0 0,400 ± 334 0/0/09 0,770 ±,40 04/07/0 7,800 ± 378 0/07/09 79,870 ±,60 04/4/0 9,900 ± 47 0/4/09 90,80 ±,00 04//0 68,800 ± 69 0//09 5,40 ± 99 04/7/0 87,500 ± 80 0/8/09 90,360 ± /04/0 68,000* /04/09 44,050 ± //0 95,000* //09 96,450 ± /9/0 9,800* /8/09 75,490 ± 80 05/6/0 50,800* /4/09 83,350 ± /0/0 56,600* /0/09 94,60 ± 85 06/08/0 53,800* /08/09 40,390 ± /5/0 58,800* *BNE split sample results from 05/04/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

22 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 06//0 65,480 ± /0/ 9,060 ± 669 (continued) 06/30/0 7,079 ± /4/ 3,00 ± 98 07/08/0 88,38 ± /3/ 6,30 ± /4/0 77,3 ± /6/,40 ± 79 07//0 66, ± /3/ 7,0 ± /7/0 53,776 ± 506 0// 8,650 ± 46 08/04/0 5,43 ± 546 /6/ 6,900 ± //0 66,778 ± 607 /08/ 4,980 ± /8/0 6,733 ±,80 0/7/ 9,550 ± 4 08/4/0 7,400 ±,840 0/4/ 0,400 ± /3/0 50,700 ±,00 03/3/ 6,90 ± 98 09/08/0 74, ±,470 04/8/ 4,900 ± /5/0 85,00 ±,680 05/5/ 3,50 ± 60 09//0 53,900 ±,0 06/0/,600 ± 99 09/9/0 36,800 ± /03/,470 ± 363 0/06/0 7,460 ± /4/ < 85 0/3/0 3,000 ± /9/,90 ± 39 0/0/0 8,000 ± 5 0/0/,400 ± 656 0/7/0 7,700 ± 50 /4/ 7 ± 4 /03/0 7,000 ± 640 /05/ 978 ± /0/0,000 ± 439 0/08/3,730 ± 307 /7/0 4,900 ± 49 0//3 64 ± 56 /3/0,400 ± /05/3 94 ± 3 /5/0 30,400 ± /08/3,70 ± 84 0// 4,00 ± 49 07//3,330 ± 85 0/5/ 6,700 ± 59 0/08/3 3,00 ± 63 03/5/ 7,90 ± 55 0/4/4 < 5 04/3/ 5,000 ± /08/4 < 09 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

23 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 07/5/4,00 ± 75 (continued) 0/4/4 539 ± 66 0/3/5 < 67 04/4/5 < 7 07/5/5 < 3 0/3/5 < 0/0/6 < 63 04/05/6 < 05 07/9/6 < 3 0/8/6 < 9 0/0/7 < 74 04/04/7 < 07 07//7 < 4 0/0/7 < 4 0/7/8 < 44 Results in picocuries per liter Sampling frequency is quarterly

24 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-56I 5.9 Cohansey 09/6/09 47,830 ±,870 0/3/0,76,430 ±,870 09/8/09 430,890 ±,790 03/0/0,54,40 ±,900 09/3/09 537,400 ±,000 03/09/0,060,50 ±,70 09/5/09 53,540 ±,990 03/6/0,069,680 ±,740 09/8/09 566,0 ±,070 03/3/0 98,000 ±,690 09/30/09 596,900 ±,0 03/3/0 906,000 ±,660 0/0/09 636,940 ±,80 04/06/0 87,000 ±,60 0/07/09 589,30 ±,090 04/4/0 9,000 ±,470 0/4/09 698,70 ±,80 04/0/0 96,000 ±,470 0//09 765,490 ±,390 04/7/0 990,000 ±,650 0/9/09 897,460 ±,570 05/04/0,,000* /04/09 938,790 ±,630 05//0 979,000* //09 945,70 ±,670 05/8/0 985,000* /8/09 957,790 ±,670 05/5/0 868,000* /4/09 993,90 ±,70 06/0/0,00,000* /0/09,86,030 ±,970 06/08/0,080,000* /08/09,,800 ± 3,00 06/5/0,0* /5/09,66,990 ±,940 06//0 777,484 ±,978 //09,40,40 ±,90 06/30/0 749,60 ±,88 /9/09,056,500 ±,800 07/07/0 70,353 ±,805 0/05/0,06,580 ±,80 07/4/0 60,8 ±,650 0//0 983,540 ±,750 07//0 657,40 ±,764 0/9/0 940,970 ±,640 07/7/0 55,797 ±,57 0/6/0,089,600 ±,800 08/04/0 63,57 ±,86 0/0/0,,600 ±,890 08//0 603,66 ±,79 0/09/0,39,800 ±,880 08/8/0 634,648 ± 3,96 0/6/0 874,00 ±,470 08/4/0 64,000 ±,500 *BNE split sample results from 05/04/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

25 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-56I 5.9 Cohansey 08/3/0 538,000 ± 0,500 0/4/ 4,400 ± 789 (continued) 09/08/0 596,000 ±,700 03/3/ 4,90 ± 7 09/5/0 578,000 ±,30 04/8/ 3,440 ± 40 09//0 96,000 ±,730 05/5/ 5,00 ± 94 09/8/0 333,000 ± 6,490 06/0/ 98,700 ±,080 0/06/0 474,000 ±,80 07/03/,800 ± 409 0/4/0 305,000 ± 5,940 08/4/ 4,00 ±,340 0/0/0 337,000 ±,80 09/9/ 6,50 ± 470 0/7/0 3,000 ± 3,30 0/0/ 6,690 ± 483 /03/0 377,000 ± 7, /4/ 46,700 ±,440 /0/0 338,000 ± 6,60 /05/ 34, ±,070 /7/0 74,000 ±,760 0/08/3 5,350 ± 493 /3/0 4,000 ± 8 0//3 4,800 ± 93 /5/0 3,90 ± 35 03/05/3 6,80 ± 56 0//,340 ± 93 04/08/3 6,00 ± 0/5/ 4,960 ± 36 07//3 8,70 ± 38 03/5/ 5,060 ± 459 0/08/3 4,340 ± 9 04/3/ 5,090 ± 506 0/3/4 8,900 ± 54 05/0/ 3,980 ± /09/4 7,870 ± 64 06/4/ 0,700 ± /5/4 5,630 ± /3/ 7,540 ± 55 0/4/4 4,500 ± /6/ 46,500 ±,90 //4 7,90 ± /3/ 7,800 ± 86 0/3/5 5,090 ± 305 0// 5,490 ± /4/5,00 ± 53 /6/ 5,960 ± 35 06/05/5,980 ± 70 /4/ 6,0 ± 8 07/5/5 7,330 ± 33 0/8/ 5,870 ± 33 0/3/5,30 ± 95 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

26 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-56I 5.9 Cohansey 0/0/6,50 ± 357 (continued) 04/05/6,90 ± 07/9/6,580 ± 0/8/6,770 ± 89 0/7/7 8,030 ± /05/7 9,970 ± 35 07//7 3,340 ± 46 0/0/7 4,070 ± 40 0/7/8,00 ± 8 Results in picocuries per liter

27 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-57I 47.9 Cohansey 09/03/09 536,700 ±,000 0/09/0 4,60 ±,50 09//09 76,976 ±,383 0/6/0 9,860 ±,90 09/6/09 455,60 ±,840 0/4/0 87,30 ±,440 09/8/09 39,930 ±,700 03/0/0 46,90 ±,330 09/3/09 407,43 ±,740 03/09/0 07,840 ±,0 09/5/09 388,670 ±,700 03/6/0 8,560 ±,50 09/8/09 359,0 ±,650 03/3/0 98,000 ±,40 09/30/09 389,40 ±,70 03/3/0 4,000 ± 956 0/0/09 470,360 ±,870 04/07/0 94,000 ±,40 0/07/09 505,0 ±,940 04/4/0 68,000 ±,060 0/4/09 43,30 ±,780 04/0/0 55,000 ±,00 0//09 9,380 ±,480 04/7/0 74,000 ±,0 0/9/09 40,580 ±,740 05/05/0 83,800* /04/09 33,990 ±,570 05//0 60,00* //09 88,900 ±,460 05/9/0 83,800* /8/09 403,090 ±,740 05/5/0 59,800* /4/09 350,30 ±,60 06/0/0 53,600* /0/09 569,690 ±,060 06/08/0 5,900* /08/09 89,460 ±,470 06/5/0 5,* /5/09 549,530 ±,00 06//0 69,680 ± 60 //09 34,700 ±,530 06/9/0 96,565 ± 678 /9/09 53,00 ±,380 07/07/0 9,65 ± 67 0/05/0 94,700 ±,50 07/4/0,60 ± 336 0//0 94,680 ±,50 07//0 55,763 ± 5 0/9/0 637,900 ±,80 07/7/0 5,550 ± 54 0/6/0 48,750 ±,330 08/03/0 40,496 ± 476 0/0/0 77,340 ±,430 08//0 54,53 ± 556 *BNE split sample results from 05/05/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

28 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-57I 47.9 Cohansey 08/8/0 49,698 ±,50 0/4/ 0,600 ± 946 (continued) 08/4/0 50,000 ±,960 03/3/ 4,400 ± /3/0 49, ± /8/ 8,700 ±,0 09/08/0 64,700 ±,80 05/6/ 35, ± /5/0 60, ±,00 06/0/ 34,800 ±,30 09//0 7,700 ± /03/ 3, ±,00 09/9/0 64,700 ±, 08/4/ 9,500 ± 90 0/06/0 54,900 ± /8/ 3,800 ± 690 0/3/0 80,800 ±,60 0/0/ 6,000 ± 74 0/0/0 40,900 ± 773 /4/ 8,700 ± 95 0/7/0 7,450 ± 358 /05/ 5,800 ± 70 /03/0 7,00 ±,380 0/08/3 6,690 ± 557 /0/0 4,700 ± 857 0//3 3,700 ± 46 /6/0 47,600 ± /05/3 5,900 ± 860 /5/0 69,900 ± 86 04/08/3 9, ± 500 0// 8,600 ± 89 07/09/3,900 ± 449 0/5/ 80,00 ±,0 0/08/3,40 ± 0 04/3/ 84,000 ±,670 0/4/4 4,400 ± /0/ 37,400 ±,330 04/09/4 0,900 ± 70 06/4/ 40,700 ±,0 07/5/4 6,940 ± /3/ 7,00 ± 798 0/3/4 6,370 ± 34 08/6/ 49,400 ±,30 0/3/5,760 ± 9 09/3/ 38,700 ±,90 04/4/5,660 ± 0 0// 5,700 ± 55 07/5/5 70 ± 54 /6/ 33,600 ± 768 0/3/5,970 ± 08 /08/ 7,600 ±,00 0/0/6 6,350 ± 5 0/7/ 9,800 ±,40 04/05/6,670 ± 4 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

29 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-57I 47.9 Cohansey 07/9/6,680 ± 8 (continued) 0/7/6 3,500 ± 395 0/0/7 435 ± 64 04/03/7 < 0 07/0/7 < 4 0/0/7 56 ± 47 0/7/8 855 ± 73 Results in picocuries per liter Current sampling frequency is quarterly

30 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-58I 7.0 Cohansey 07//0 < 3 0/0/6 < 6 07/7/0 < 99 04/05/6 < 40 08/03/0 < 7 07/9/6 < 0 08//0 < 8 0/7/6 < 93 08/8/0 < 58 0/0/7 < 8 08/4/0 < 37 04/03/7 < 5 0/4/0 < 0 07/0/7 < 96 0// < 5 0/0/7 < 4 04/3/ < 8 0/7/8 < 83 07// < 8 0// < 55 0/8/ < 40 04/8/ < 8 07/03/ < 7 0/0/ < 6 0/08/3 < 40 04/09/3 < 8 07/09/3 < 6 0/08/3 < 60 0/4/4 < 8 04/09/4 < 55 07/5/4 < 08 0/3/4 < 45 0/3/5 < 69 04/4/5 < 73 07//5 < 6 0/3/5 < 3 Results in picocuries per liter Well Water ID MW-58I is part of the Exelon Nuclear existing Radiological Groundwater Protection Program. Current sampling frequency is quarterly.

31 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-59I 44.0 Cohansey 03/4/0,540 ± 08 09/8/0 < 49 03/30/0,660 ± 7 0/3/0 < 3 04/06/0,000 ± 4 0/7/0 < 45 04/3/0,0 ± 99 /0/0 < 48 04//0,40 ± 07 /3/0 353 ± 9 04/8/0,060 ± 98 /4/0 < 08 05/05/0,580* 0// < 99 05//0,60* 0/5/ < 8 05/8/0,580* 04/3/ < 56 05/6/0,70* 07/3/ < 59 06/0/0 776* 0// < 79 06/08/0 755* 0/7/ < 4 06/6/0 563* 04/8/ < 03 06//0 < 5 07/0/ < 60 06/9/0 < 447 0/0/ < 69 07/07/0 < 438 0/08/3 < 77 07/3/0 < /09/3 < 40 07//0 < /09/3 < 6 07/8/0 < 456 0/09/3 < 5 08/03/0 < 440 0/4/4 < 84 08/0/0 < /09/4 < 58 08/8/0 < /6/4 < 08/4/0 < 36 0/3/4 < 40 09/08/0 < 09 0/3/5 < 66 09//0 < 5 04/4/5 < 75 *BNE split sample results from 05/05/0 through 06/6/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter Current sampling frequency is quarterly.

32 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-59I 44.0 Cohansey 07//5 < (continued) 0/3/5 < 00 0/0/6 < 59 04/05/6 < 4 07/9/6 < 0/7/6 < 9 0/0/7 < 80 04/04/7 534 ± 56 07/0/7 < 0 0/0/7 < 3 0/7/8 < 64 *BNE split sample results from 05/05/0 through 06/6/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter Current sampling frequency is quarterly.

33 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-60I 9.0 Cohansey 07//0 < 0 07//5 < 07 07/7/0 < 98 0/3/5 < 99 08/03/0 < 3 0/0/6 < 60 08//0 < 3 04/05/6 < 6 08/8/0 < /9/6 < 08/4/0 < 36 0/7/6 < 90 0/4/0 < 4 0/0/7 < 8 0// < 3 04/03/7 < 03 04/3/ < 79 07/0/7 < 0 07// < 85 0/0/7 < 0 0// < 75 0/7/8 < 90 0/8/ < 47 04/8/ < 07/03/ < 4 0/0/ < 0 0/08/3 < 37 04/09/3 < 50 07/09/3 < 64 0/08/3 < 54 0/4/4 < 87 04/09/4 < 64 07/5/4 < 3 0/3/4 < 40 0/3/5 < 76 04/4/5 < 78 Results in picocuries per liter Well Water ID MW-60I is part of the Exelon Nuclear existing Radiological Groundwater Protection Program. Current sampling frequency is quarterly.

34 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-6I 7.0 Cohansey 07//0 4,85 ± 98 07//5 < 07/7/0 8,469 ± 3 0/3/5 < 0 08/03/0 0,569 ± 68 0/0/6 < 53 08//0,337 ± 77 04/05/6 < 44 08/8/0,766 ± /9/6 < 08/4/0,000 ± 746 0/8/6 < 88 0// 6,80 ±,40 0/0/7 < 8 04// 390 ±75 04/03/7 < 6 07/3/ < 59 07//7 < 9 0// < 78 0/0/7 < 0/8/ < 3 0/7/8 < 39 04/7/ < 07/03/ < 0 0/03/ < 0 0/08/3 < 40 04/09/3 < 5 07//3 < 6 0/08/3 < 59 0/3/4 < 04/0/4 < 55 07/6/4 < 03 0/4/4 < 38 0/3/5 < 69 04/5/5 < 75 Results in picocuries per liter Well Water ID MW-6I is part of the Exelon Nuclear existing Radiological Groundwater Protection Program. Current sampling frequency is quarterly.

35 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 03/0/0 < 70 09/8/0 < 45 03/7/0 < 9 0/3/0 < 3 03/4/0 < 84 /6/0 < 03 03/30/0 < 83 /4/0 < 03 04/06/0 < 84 0// < 0 04/3/0 < 70 0/5/ < 9 04/0/0 < 65 03/5/ 40 ± 30 04/8/0 < 67 04// < 55 05/04/0 < 80* 05/0/ < 95 05//0 < 76* 06/4/ < 79 05/8/0 < 68* 07// < 60 05/7/0 < 78* 08/6/ < 74 06/03/0 < 00* 09/3/ < 8 06/09/0 < 69* 0// < 77 06/6/0 < 50* /5/ < 78 06/3/0 < 05 /08/ < 06 06/9/0 < 05 0/7/ < 44 07/07/0 < 06 0/3/ < 0 07/3/0 < /3/ < 0 07//0 < 0 04/7/ < 99 07/8/0 < /5/ < 55 08/04/0 < /9/ < 69 08/0/0 3,0 ± /0/ < 64 08/7/0 < /4/ < 70 08/5/0 < 4 09/8/ < 9 *BNE split sample results from 05/04/0 through 06/6/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

36 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 0/0/ < 75 (continued) 03/05/3 < 37 04/08/3 < 70 07//3 < 05 0/09/3 < 00 0/4/4 < 7 04/08/4 < 09 07/5/4 < 0/4/4 < 35 0/3/5 < 75 04/6/5 < 36 07/5/5 < 5 0/4/5 < 07 0/0/6 < 65 04/06/6 < 0 07/9/6 < 33 0/8/6 < 3 0/0/7 < 87 04/04/7 < 06 07//7 < 4 0/0/7 < 4 0/7/8 < 94 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

37 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-63I 9.0 Cohansey 07//0 < 3 07//5 < 07/7/0 < 03 0/3/5 < 06 08/03/0 < 4 0/0/6 < 60 08//0 < 3 04/05/6 < 4 08/7/0 < 56 07/9/6 < 7 08/4/0 < 33 0/8/6 < 90 0/4/0 < 0 0/0/7 < 0// < 5 04/03/7 < 08 04// < 70 07//7 < 48 07/3/ < 80 0/0/7 < 09 0// < 79 0/7/8 < 7 0/8/ < 48 04/7/ < 07/03/ < 07 0/03/ < 0/08/3 < 4 04/09/3 < 53 07//3 < 95 0/08/3 < 80 0/3/4 < 86 04/0/4 < 56 07/6/4 < 07 0/4/4 < 40 0/3/5 < 75 04/5/5 < 87 Results in picocuries per liter Well Water ID MW-63I is part of the Exelon Nuclear existing Radiological Groundwater Protection Program. Current sampling frequency is quarterly.

38 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 03/0/0,930 ± /08/0 5,00 ± /7/0 5,450 ± 68 09//0, ± /4/0,830 ± 30 09/9/0 8,00 ± 63 03/3/0,50 ± 6 0/3/0 4,00 ± /07/0,90 ± 96 0/7/0 3,000 ± /4/0,640 ± 93 /0/0 7,50 ± /0/0,60 ± 0 /3/0 6,00 ± 39 04/7/0 3, ± 348 /5/0 6,060 ± 79 05/05/0,070* 0// 3,650 ± 05//0 7,040* 0/5/,850 ± 9 05/9/0 6,00* 03/5/ 3,490 ± /5/0 5,30* 04/3/ 3,40 ± 5 06/0/0 4,80* 05/0/,680 ± /08/0 6,50* 06/4/,360 ± 90 06/5/0 3,00* 07/3/,050 ± 06//0 0,55 ± 53 08/6/,080 ± 70 06/9/0 6,608 ± /3/ 3,780 ± 45 07/07/0 7,767 ± 47 0//,780 ± 77 07/4/0 3,86 ± 58 /6/ 3,80 ± 85 07//0 3,88 ± 58 /08/,030 ± 30 07/7/0 7,70 ± 480 0/7/,00 ± 38 08/03/0 0,6 ± 536 0/4/ 3,800 ± 4 08//0,38 ± /3/,650 ± 9 08/8/0 0,984 ± 63 04/8/,950 ± 35 08/4/0 40, ±,390 05/6/ 88 ± 80 *BNE split sample results from 05/05/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

39 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 06/0/ < 70 0/0/7 < 38 (continued) 07/03/ < 49 04/03/7 < 05 08/4/ < 83 07/0/7 < 60 09/8/ < 96 0/0/7 < 3 0/0/ 40 ± 38 0/7/8 < 77 /4/ < 5 /05/ < 09 0/08/3 384 ± 80 0//3 6 ± 33 03/05/3 08 ± 38 04/09/3 < 7 07/09/3 < 45 0/08/3 80 ± 66 0/4/4 86 ± 04/09/4 < 09 07/5/4 < 0/3/4 < 4 0/3/5 < 74 04/4/5 < 40 07/5/5 < 4 0/3/5 < 08 0/0/6 < 56 04/05/6 < 00 07/9/6 < 34 0/7/6 < 9 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

40 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 03/0/0 < 69 08/4/0 < 33 03/7/0 < 94 09/8/0 < 46 03/4/0 < 83 0//0 < 03/30/0 < 83 /6/0 < 0 04/06/0 < 85 /4/0 < 07 04/3/0 < 68 0// < 0 04//0 < 67 0/5/ < 8 04/8/0 < 65 03/5/ 93 ± 4 05/05/0 < 74* 04// < 55 05//0 < 74* 05/0/ < 98 05/8/0 < 5* 06/4/ < 76 05/6/0 < 78* 07// < 6 06/0/0 < 8* 08/6/ < 75 06/08/0 < 70* 09/3/ < 9 06/6/0 < 49* 0// < 80 06//0 < 6 /5/ < 78 06/9/0 < 0 /4/ < 0 07/07/0 < 0/7/ < 43 07/3/0 < 469 0/3/ < 75 07//0 < 44 03// < 07/8/0 < 45 04/7/ < 04 08/03/0 < /6/ < 54 08/0/0 < /9/ < 7 08/8/0 < /0/ < 56 *BNE split sample results from 05/05/0 through 06/6/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

41 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 08/5/ < 67 04/04/7 < 5 (continued) 09/8/ < 90 07/0/7 < 57 0/0/ < 75 0/0/7 < 5 /4/ < 7 0/7/8 < 9 /05/ < 7 0/08/3 < 38 0//3 < 0 03/05/3 < 7 04/09/3 < 37 07/09/3 < 57 0/09/3 < 56 0/4/4 < 84 04/09/4 < 09 07/6/4 < 0 0/3/4 < 44 0/3/5 < 70 04/4/5 < 36 07/5/5 < 0/3/5 < 09 0/0/6 < 68 04/05/6 < 04 07/9/6 < 34 0/7/6 < 9 0/0/7 < 85 Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly

42 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW-66I 80.0 Cohansey 07//0 < 0/4/5 < 06 07/9/0 < 0//6 < 07 08/05/0 < 8 04/07/6 < 40 08/0/0 < 3 07/0/6 < 7 08/7/0 < 555 0/9/6 < 08/5/0 < 06 0//7 < 0//0 < 04/04/7 < 4 0// < 54 07//7 < 45 04// < 78 0//7 < 04 07/3/ < 88 0/8/8 < 9 0// < 73 04/7/ < 0 07/0/ < 4 0/0/ < 0/09/3 < 03 04/0/3 < 5 07/0/3 < 48 0/09/3 < 70 0/4/4 < 84 04//4 < 68 07/6/4 < 4 0/5/4 < 34 0/4/5 < 74 04/6/5 < 74 07/0/5 < 3 Results in picocuries per liter Well Water ID MW-66I is part of the Exelon Nuclear existing Radiological Groundwater Protection Program. Current sampling frequency is quarterly.

43 BNE Split Results Table : Groundwater Monitoring Wells (continued) MDA NJGWQS MW Cape May 03/0/0 637,40 ±,0 08/5/0 554,000 ± 0,800 03/7/0 78,000 ±,390 08/3/0 570,000 ±,00 03/4/0 787,000 ±,480 09/08/0 577,000 ±, 03/30/0 806,000 ±,50 09/5/0 47,000 ± 8,360 04/06/0 965,000 ±,740 09//0 480,000 ±,90 04/3/0 98,000 ±,450 09/9/0 55,000 ± 0,700 04/0/0 736,000 ±,0 0/06/0 639,000 ±,630 04/8/0 904,000 ±,50 0/4/0 306,000 ± 5,960 05/04/0 70,000* 0/0/0 77,000 ±,990 05//0 893,000* 0/7/0 43,000 ±,380 05/8/0 83,000* /03/0,70,000 ±,400 05/7/0 899,000* /0/0 74,000 ± 3,900 06/03/0 95,000* /7/0 64,000 ±,650 06/09/0 95,000* /3/0 544,000 ± 0,500 06/5/0 94,000* /5/0 676,000 ±,640 06/3/0 688,075 ±,847 0// 83,000 ±,830 06/9/0 630,745 ±,76 0/5/ 759,000 ± 7,360 07/07/0 605,089 ±,698 04/3/ 458,000 ± 8,950 07/4/0 59,45 ±,666 05/0/ 0,000 ± 3,0 07//0 579,843 ±,69 06/4/ 88,000 ± 5,580 07/8/0 579,669 ±,73 07/3/ 00,000 ± 3,890 08/04/0 608,76 ± 3,558 08/6/ 38,000 ± 6,40 08/0/0 563,6 ± 3,438 09/3/ 83,000 ± 3,560 08/7/0 594,373 ± 3,86 0// 0,000 ±,900 *BNE split sample results from 05/04/0 through 06/5/0 were not available due to the closing of Centauri Labs- Alabama facility. For this time period, data reported above are from Exelon s contract lab, Teledyne Brown Engineering. Subsequent samples were analyzed by Eberline Services and GEL Laboratories, both under contract with the NJDEP. Results in picocuries per liter On May, 03, the sampling frequency was reduced from monthly to quarterly