ML061070497
| ML061070497 | |
| Person / Time | |
|---|---|
| Site: | Braidwood  |
| Issue date: | 02/02/2006 |
| From: | Polson K Exelon Generation Co, Exelon Nuclear |
| To: | Booker B Office of Nuclear Reactor Regulation, State of IL, Environmental Protection Agency, Bureau of Water |
| References | |
| BW060011, FOIA/PA-2006-0115, FOIA/PA-2010-0209 | |
| Download: ML061070497 (19) | |
Text
E>Plon GCTerationCompa ny, LLC whov.AvexeIcnccrp.com Exekln..
Nuclear 6rmdwood StatiorN 35!0o South Rt 53. Suite 84 Br.cevil~e, IL6o4o7-9619 February 2, 2006 BWO60011 Ms. Beverly Booker IllInois Environmental Protection Agency Bureau of Water, CAS #19 P. 0. Box 19276 Springfield, IL 62794-9276
Subject:
Braidwood Station Response to Violation Notice W-2005-00537
Reference:
Letter from Illinois EPA, "Violation Notice: Exelon Generation -
Braidwood Station," dated December 16, 2005
Dear Ms. Booker:
In the referenced letter, the Illinois Environmental Protection Agency (Illinois EPA) issued a Violation Notice to Exelon Generation Company, LLC (Exelon) regarding groundwater quality at Braidwood Station and adjoining property. The Violation Notice is based on sampling results obtained between December 1 and December 12, 2005, that indicate the level of tritium exceeds the standards set forth in Section 12 of the Illinois Environmental Protection Act and the Illinois Pollution Control Board's regulations.
The enclosure to this letter contains Exelon's response to the Violation Notice. The response describes our actions to protect and inform the public, cease the release of tritium to groundwater, prevent future release of tritium to the groundwater, and our plans to address the elevated levels of tritium in the existing groundwater.
In accordance with 415 ILCS 5/31, "Notice; complaint; hearing;" subdivision (a)(2)(C), Exelon requests a meeting with representatives of the Illinois EPA to discuss this matter. We will contact the Illinois EPA to arrange this meeting.
This written response is being submitted within 45 days of Exelon's receipt of the Violation Notice via certified mail (i.e., December 20, 2005). By submitting this response, Exelon is not admitting that it has violated the Illinois Environmental Protection Act or the regulations of the Illinois Pollution Control Board. If you have any questions about this response, please contact Kenneth Ainger at 630 657-2800.
Respectfully, Keith J. Polson Site Vice President Braidvwood Station VIA CERTIFIED MAIL RETURN RECEIPT REQUESTED
ENCLOSURE RESPONSE TO VIOLATION NOTICE W-2005-00537 I. Violation Notice Allegations On December 16, 2005, the Illinois EPA issued the following in a violation notice to Exelon Generation Company, LLC:
Groundwater Quality No person shall cause, threaten, or allow the release of any contaminant to resource groundwater such that treatment or additional treatment is necessary to continue an existing use or to assure a potential use of such groundwater, or such that the existing or potential use of such groundwater is precluded. Exelon Generation - Braidwood Station must cease and decease of any further violations of the Act; Violation Violation Date Descriotion 12112/05 Sampling results indicate violations of Section 12 of the Act, the General Prohibition Against Use Impairment of Resource Groundwater, and the causing of the groundwater quality standard of tritium (20,000 pCi/L) to be exceeded during the time period and at the location(s) designated below:
RW-2 10.5 ft. depth 58,621 pC1L RW-2 20.5 ft. depth 170,024 pCi/L RW-2 25 ft. depth 223,888 pCi/L Rule/Reg. Section 12(a), and (d) of the Act, 415 ILCS 5/12, 35 III. Adm. Code 620.115, 35 Ill. Adm. Code 620.301 (a)(1) and (2), and 35 III. Adm. Code 620.41 0(e)(3).
12/07/05 Sampling results indicate violations of Section 12 of the Act, the General Prohibition Against Use Impairment of Resource Groundwater during the time period and at the location(s) designated below:
Private well located at horse barn North of pond 1,151 pCi/L Flule/Reg. Section 12(a), and (d) of the Act, 415 ILCS 5/12, 35 Ill. Adm. Code 620.115, and 35 III. Adm. Code 620.301(a)(1) and (2).
12106/05 Sampling results indicate violations of Section 12 of the Act, the General Prohibition Against Use Impairment of Resource Groundwater, and the causing of the groundwater quality standard of tritium (20,000 pCi/L) to be exceeded during the time period and at the location(s) designated below:
VB-3-4 58,489 pCi/L VB-3-3 43,894 pCi/L VB-3-2 32,830 pCi/L VB-3-6 53,572 pCi/L P-4 33,736 pCi/L RW-2 33,736 pCilL
i.
Rule/Reg. Section 12(a), and (d) of the Act, 415 ILCS 5/12,35 III. Adm. Code 620.115, 35 III. Adm. Code 620.301 (a)(1) and (2), and 35 III. Adm. Code 620.41 0(e)(3).
Violation Violation Date - escriotion 12/01/05 Sampling results indicate violations of Section 12 of the Act, the General Prohibition Against Use Impairment of Resource Groundwater during the time period and at the location(s) designated below:
Pond located just north of Smiley Rd. and west of the 2,347 pCI/L blow-down line. 2,464 pCi/L Rule/Reg. Section 12(a), (d), and (f) of the Act, 415 ILCS 5/12.
II. Exelon Response The following response describes our actions to protect and inform the public, cease the release of tritium to groundwater, prevent future release of tritium to the groundwater, and our plans to address the elevated levels of tritium in the existing groundwater. In order to further assist the Illinois EPA in an understanding of site conditions, we are including in Attachment 1 a summary of key investigative data collected to date at the site. These data summaries are considered preliminary, as we are collecting additional data and continuing our evaluations, and include:
- 1. A base map of monitoring locations and key site features.
- 2. Groundwater level contour maps of the shallow and deep zones of the upper aquifer.
- 3. Estimated tritium concentrations presented in contour maps of the shallow and deep zones.
- 4. A hydrogeologic cross-section.
- 5. A table summarizing permanent and temporary well monitoring specifications.
- 6. A table summarizing sample results for tritium analyses from wells in the site area; and
- 7. A table summarizing tritium results from samples collected at private wells.
Protection and Notification of the Public Exelon's first priority in response to this issue is the protection of the public. When we determined in late November 2005 that tritium in groundwater had likely migrated off the Braidwood Station property, we notified potentially affected residents. Door-to-door initial notifications were made to inform them of the status of our investigation, present them a fact sheet from the U. S. EPA regarding tritium, offer to sample their private wells for the presence of tritium, and respond to their questions and concerns. The results of the private well sample analyses, conducted by an independent laboratory, were provided to the residents. On December 12, 2005, Exelon conducted a meeting with the potentially affected local residents to update them on the status of our ongoing investigation, explain future actions and address their questions and concerns. In addition, we have met individually with a number of residents to address specific 2
concerns. A second round of door-to-door updates was conducted with the potentially affected residents on December 29, 2005, during which we provided those residents a copy of our December 29, 2005 news release and invited them to another update meeting which was held on January 26, 2006.
Inaddition to sampling private wells, Exelon obtained permission from potentially affected residents to drill temporary wells on their property and to sample water from ponds on their property to determine the migration of the tritium in groundwater.
Exelon's plume characterization team continued sampling, analyzing and notifying adjoining land owners until the leading edge of the tritium was identified. Exelon has sampled over 31 private wells, drilled and sampled over 150 monitoring wells on and off the property, and sampled nearby surface water ponds offsite to laterally and vertically identify the distribution of tritium in the groundwater.
In order to identify potential users of groundwater in the down-gradient direction of flow (which is to the north) from the blowdown pipeline, Exelon initiated a comprehensive well inventory and well records search. This search is being conducted through the Illinois State Water Survey and includes groundwater users that can be identified within a one mile radius of the blowdown pipeline. The location of the wells, their use, depth and construction are being compiled for future evaluations. This well inventory, along with previously identified well users (private residences where wells have already been sampled), will form the basis of Exelon's notification list. This list will identify additional private, as well as public, water supply users that would be notified if it isdetermined there is a potential for impact to their water supply wells.
Cessation of Release of Tritium to Groundwater Liquid radioactive effluent releases into the Braidwood Station circulating water blowdown line were suspended on November 23, 2005. This action was taken until additional information could be collected and testing conducted to ensure the integrity of the pipeline at all locations. Braidwood Station has not processed any liquid radioactive effluents through the circulating water blowdown pipeline since November 23, 2005.
As a result of suspending liquid radioactive effluent releases into the circulating water blowdown pipeline, temporary 20,000 gallon water storage tanks are being used to store lijuid radioactive effluents onsite until new radioactive waste processing equipment is made operational.
An acoustical leak detection test was completed on January 6, 2006 to verify the integrity of the circulating water blowdown pipeline. A tethered acoustical sensor head inserted into the pipe was carried by the circulating water blowdown flow providing leak detection as it traversed along the pipeline length. The sensitivity of the sensor was determined by Exelon Engineering to detect a one gallon per minute leak under-normal operating blowdown line pressure. One anomaly was identified at the end of the pipeline near the Kankakee River. This area was excavated and a visual inspection of the exposed pipe determined there was no leak.
AlI:hough there have been no liquid radioactive effluent releases through the circulating water blowdown pipeline since November 23, 2005, because the vacuum breaker valves installed along the length of the blowdown pipeline have been a source of leaks and 3
spills, a daily visual inspection of the blowdown pipeline is being conducted to verify no gross leakage.
In addition, Exelon has completed the following activities.
- Installation and sampling of over 30 shallow (approximately 15 ft. deep) and over 20 deep (approximately 25 ft. deep) monitoring points adjacent to the blowdown pipeline.
- Laboratory analyses of over 60 samples for tritium as a direct indicator of leakage from the blowdown pipeline and 45 samples for chloride and sodium which have been established as an indicator of the Braidwood Station cooling lake water flowing in the blowdown pipeline.
- Measurement of water levels along the blowdown pipeline and comparison with the regional, shallow groundwater table to determine if significant leaks are creating a mounding effect on the water table.
- Comparison of the three dimensional distribution of tritium in the groundwater to the plumes located south of Smiley Road to determine if it correlates with an on-going, or active release from the blowdown pipeline.
The above activities have relied upon groundwater data collected to date near and down-gradient of the blowdown pipeline. None of the data have indicated to Exelon and to its hydrogeologic experts that tritium measured in the groundwater on and off property has come from an active leak in the circulating water blowdown pipeline or vacuum breakers.
Prevention of Future Release of Tritium to Groundwater Exelon is taking several actions, as described below, to prevent future releases of tritium into the groundwater. These include a potential design change involving discharge of liquid effluent into an additional circulating water blowdown pipeline, a project to significantly reduce the overall liquid discharge of tritium from Braidwood Station, and, in the event of a future spill, procedure changes to create a more effective response to minimize the impact to the environment.
Liquid effluents will not be introduced into the current circulating water blowdown p peline unless leakage from this pipeline and vacuum breaker valves can be prevented with a high level of confidence. Exelon is currently exploring options for an alternate pipeline for discharge of liquid radioactive effluents that would maintain the current discharge point, but eliminate concerns with the existing circulating water blowdown piDeline and vacuum breaker valves.
Additionally, a project is underway at Braidwood Station to minimize liquid radioactive effluent releases into the circulating water blowdown pipeline in the future with the installation of new water processing equipment in the radioactive waste system. These improvements include state-of-the-art technologies in reverse osmosis and an additional unit to recycle existing liquid radioactive waste inventory into water that meets our quality requirements for the reactor coolant system. Also, Braidwood Station intends to install a means of converting liquid effluents to gaseous effluents.
4
Exelon is also looking into methods of reducing the production of tritium through various changes in reactor core configuration and primary water chemistry. These include potential changes in the reactor fuel rod design, "burnable poisons" in the reactor core, and fuel cycle length. Exelon is also partnering with its vendors to explore possible new technologies in tritium separation.
Finally, in the event of a future spill, the following actions are being taken to improve Exelon's response and minimize the impact to the environment.
- 1. A corporate environmental manager was assigned the action to institutionalize Exelon's tritium environmental spill response knowledge. The manager will utilize input from the various functional areas to develop an integrated set of procedures to mitigate and remediate spills with the potential to contain radioactive isotopes. Appropriate personnel will be trained on these procedures.
A review of the effectiveness of the procedure development and training will be conducted at a suitable interval following completion.
- 2. The knowledge of Braidwood Station personnel regarding environmental regulations and reporting requirements will be enhanced with additional training.
Training programs for personnel in the Operations, Chemistry/Environmental, and Radiation Protection Departments will be analyzed to determine additional knowledge requirements to address low level radioactivity spill reporting and personnel will be trained and tested on the changes. General training for all employees will be reviewed to identify any needed changes.
- 3. Exelon's applicable procedures/programs will be reviewed to ensure the Illinois regulations governing radioactive contamination of groundwater are correctly reflected and implemented in those documents.
Plans to Address Elevated Levels of Tritium in Existing Groundwater E-xelon proposes to address the elevated levels of tritium in existing groundwater through the Illinois EPA's Site Remediation Program (SRP). Participation in the SRP will include the following.
- 1. Conduct of a focused site investigation to characterize the extent of contamination. The investigation will focus on tritium. Since November 2005, Exelon has conducted extensive sampling as described above, and is currently evaluating the results to determine if additional sampling is necessary. A well survey, as described above, consistent with SRP rules and Illinois EPA policy, will also be included. Prior to submitting the final Site Investigation Report, Exelon will contact the Illinois EPA SRP staff to obtain input on any additional needs. The Site Investigation Report will be.
submitted as soon as possible, but no later than March 24, 2006.
- 2. Development of remedial objectives. As part of this step, Exelon will not only evaluate compliance with Part 620.410(e)(3), but risk to the public as well.
Work on developing a Remedial Objectives Report (ROR) will commence as soon as possible, and will be submitted no later than 30 days after Illinois EPA approval of the Site Investigation Report.
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- 3. Preparation of a Remedial Action Plan. Based on the results of the Site Investigation and the Remedial Objectives Report, a Remedial Action Plan (RAP) will be prepared and submitted. Options are currently being evaluated which include pumping areas of high concentration and returning these waters to the circulating water system. The RAP will include a schedule for all activities from startup to completion, and also provide for quarterly reports.
This plan will be submitted within 30 days of approval of the Remedial Objectives Report.
- 4. Submission of a Remedial Action Completion Report (RACR). Once the RAP is approved, the final remedial design will commence within 30 days and the final RACR will be submitted within 30 days of completion.
The site has not yet been precisely identified, but generally is shown as the area on figures 4 and 5. Areas separate from this site, to the east along the routing of the blowdown pipeline, are currently being investigated.
As part of the overall strategy to address this issue, a community relations plan is being implemented. The plan builds on Braidwood Station's existing community outreach program that has been used, as described above in this response, to conduct multiple communications to keep the public informed. Exelon intends to continue this effort.
The community relations plan includes development of a website with access to a fact sheet on the Braidwood tritium issue, a telephone hotline for interested members of the public to acquire information on the issue, and an upcoming community information night. The actions in our community relations plan may be adjusted over time, as the circumstances of this issue evolve. Our current community relations action plan will be submitted by March 1, 2006.
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Attachment I Summary of Key Investigative Data Figure 1 Groundwater Monitoring Locations Figure 2 Average Groundwater Contours Shallow - January 2006 Figure 3 Average Groundwater Contours Deep - January 2006 Figure 4 Estimated Tritium Results Shallow Groundwater Zone Figure 5 Estimated Tritium Results Deep Groundwater Zone Figure 6 Site Specific Hydrogeologic Profile Table 1 Monitoring Well Construction Specifications Table 2 Summary of Tritium Results in Monitoring Wells Table 3 Summary of Tritium Results at Private Wells
DRAFr Page I of 6 TABLE I MONITORING WELL CON5TRtUCT!N0 SpE CFHCAT - O 4S EXELON GENERATION BRAIDWOOD STATION Well Borint, 0 round Well Well Screen Top of Riser Screen Top Screen Bottom Stick Number Total Depth Surface Diameter Material Interval Elevation Elevation Elevation uIp (ft BGS)1 (N VD)' (iniches) (ft BG.S) (NGVD) (NGVD) (NGVI)) (ft AGS) '
MW-101 1.0.0 599.49 2 PVe 5 to 10 602.77 594.49 589.49 3.28 MW-102 11.0 602.42 2 PVC 6 to11 605.70 596.42 591.42 3.28 MW-103 8.0 595.72 2 PVC 3 to 8 598.84 592.72 587.72 3.12 MW-104 8.0 596.60 2 pvc 3 to 8 598.80 593.60 588.60 .220 MW-105 16.0 597.29 2 PVC 11 to 16 600.74 586.29 581.29 3.45 MW-105r) 24.0 59722 1 PVC 19 to 24 598.20 578.22 573.22 0.98 MW-106 16.0 599.60 2 PVC 11 to 16 602.73 588.60 583.60 3.13 MW-1061) 27.0 599.70 I PVC 22 to 27 601.81 577.70 572.70 2.11 MW-107 16.0 599.85 2 PVC 11 to 16 603.24 588.85 583.85 3.39 MW-1Q8 16.0 599.76 2 PVC 11 to16 603.10 588.76 583.76 3.34 MW-1m9 16.0 598.81 2 PVC 11 to 16 601.23 587.81 582.81 2.42 MW-l 10 20.0 604.01 3 rVc 9.5 to 19.5 607.27 594.01 584.01 3.26 MW-II 1 16.0 603.29 4 PVC 5.5 to 15.5 607.20 597.29 587.29 3.91 MW- 111D 26.5 603.17 I PVC 21.5 to 26.5 605.05 581.67 576.67 1.88 MW-112 16.0 598.57 5 PVC 5.5 to 15.6 602.62 592.57 582.57 4.05 MW-1121) 26.5 598.61 I PVC 21.5 to 26.5 600.85 577.11 572.11 2.24 MW- 13 16.0 596.10 6 PVC 5.5 to 15.7 599.77 590.10 580.10 3.07 MW-113D 24.0 *596.14 I PVC 19 to 24 596.90 577.14 572.14 0.76 VB-2-1 15.0 601.27 PVC If) to 15. 605.71 591.27 586.27 4.44 VB-2-2 15.0 596.82 I PVc 10 to 15 600.16 586.82 581.82 .134 V1-2-21) 29.5 596.49 1 PVC 24.5 to 29.5 598.95 571.99 566.99 2.46 VB.2-3 15.0 595.95 I PVC 1O to.15 600.16 585.95 550.95 4.21 V1,32-4 15.() 596.0O 1 PVC It to 15 600.82 586.08 581.08 4.74 Vn-2-5 15.0 595.76 1 PVC 10 to 15 599.82 585.76 580.76 4.06 VB-2-51) 24.0 595.76 PVC 19 to 24 596.78 576. 76 571.76 1.02 V13-2-6 n . . 1.
15.0 596.01 Pvr 6u i.44 581.01 5.43 VBs-2-6D 24.0 596.01 1 PVC 19 to 24 596.77 577.01 572.01 0.76 VP32-7 15.0 600.51 I PVC 10 to 15 602.04 59l.51 585.51 1.53 CRA 1(6$I P'rownI.lfio l. 1 TI
DRAFr TABLE 1 MONITORING WELL Page 2 of 6 CONSTRUCTMIO SPECIFICATIONS EXELON GFNERATION BRAIDWOOD STATION Well Boring Ground Well Well . Screen Top of Riser Screen Top Screen Bottom Stick Number Total Depth Surfrcr Diameter Material Interval Elevation Elevation Elevation UP (ft BGS)' (NGVD) 2 (inches) (ft BGS) (NGVD) (NGVD) (NGVV) (ftAGS) J VB-2-71) 25.0 600.51 I PVC 20 to 25 602.28 580.51 575.51 1.77 VB-2-8 15.0 598.18 I Pvc 10 to 15 599.05 588.18 583.18 0.87 VB-2-9 14.0 I PVC 9 to 14 VB-2-9D 28.() I PVC 23 to 28 VB-3-1 15.0 596.38 1 PVC 10 to 15 600.99 586.38 581.38 4.61 VB-3-2 15.0 596.49 I PVC 10 to 15 601.51 586.49 581.49 5.02 VB-3-3 15.0 596.27 I PVC -10 to 15 6)00.03 586.27 581.27 3.76 VBI-3-4 15.0 596.18 I rPVC 10 to 15 601.37 586.18 581.18 5.19 VB-34D 571.18 4.64 VB-.3-4 D 25.0 596.18 I PVC 20 to 25 600(.82 576.18 VB-3-5 15.0 I PVC 10 to 15 VB3-6 15.0 1 PVC 10 to 15 VBL3-7 14.5 596.24 1 PVC 9.5 to 14.5 599.49 586.74 581.74 3.25 VB-3-71) 24.0 596.24 PVC 19 to 24 597.04 577.24 572.24 0.80 V1-3-8 14.5 396.44 I PVC 9.5 to 14.5 599.51 586.94 581.94 3.07 VB-3-9D 24.5 595.68 rPVC 19.5 to 24.5 596.62 577.18 572.18 0.94 VR-3-10 I PVC 8 to 13 599.28 588.43 583.43 2.85 13.0 596.43 VB-3-101 23.5 596.49 1 PVC 18.5 to 23.5 598.44 577.99 572.99 1.95 VB-1-1 15.0 602.14 I PVC 10 to 15 605.62 592.14 587.14 3.48 VB-I-ID 32.0 I PVC 27 to 32 VB-1-2 15.0 599.94 I PVC 10 to 15 604.65 589.94 584.94 4.71 VB- 1-21) 28.0 rPVC 23 to 28 VB-1-3 15.0 599.64 I PVC IO to 15 603.61 589.64 584.64 3.97 4
VB-1-3D) 27.5 1 Pvc 22.5 to 27.5 VB-1-4 15.0 599.32 I PrVC 10 to 15 601.50 589.32 584.32 2.18 VB-1-4D 28.0 I PVC 23 to 28 VB-1 -5 15.0 600.17 I PVC 10e&.15 ,90(. 1/ 585.17 3.68 VH-1-5D 28.0 I PVC 23 to 28 VB-1 -6 15.0 1 PVC 10 to 15 605.34 CRA Ib8iI 1'"'enawtaon 3 -Tj
r~
r .
DRAFTr Page 3 of 6 TABLE 1 MONITORING WELL CONSTRUCT '. S.rENriCATIONS
.F EXELON GENERATION BRAIDWOOD STATION Well Boring Ground Well Well Screen Top of Riser Screen Top Screen Bottont Stick Number Total Depth Surface Diameter Material lIfterval Elevation Elevation . Elevation Up (ft BGS) I (NC VD) 2 (inches) * (ft BfGS) (NGVD) fiNl:VI)) (NC,VD) (ft AGS) 4 VB-1-6D 27.0 1 PVC 22 to 27 V13-1-7 15.0 rPVC 10 to 15 603.62 VR-1-7D 26.5 600.48 I PVC 21.5 to 26.5 602.80 578.98 573.98 2.32 VB-1.-8 15.0 1 PVC 10 to 15 603.36 VB-I-8D 26.5 600.15 1 PVC 21.5 to 26.5 602.49 578.65 57.3.65 2.34 VB-1-9 15.0 I PVC 10 to 15 601.86 V13-1-91) 27.0 I l'VC 22 to 27 RW-1 25.0 596.68 I PVC 5 to 25 599.36 591.68 572 2.68 RW-2 24.1) 596.59 I PVC 4 to 24 599.30 591.59 571.59 2.71 RW-3 24.0 396.24 I PVC 4 to 24 599.19 592.24 572.27 2.95 RW-4 24.0 596.31 1 PVC 4 to 24 598.77 592.31 572.31 2.46 031.-I 17.0 600.38 PVC 12 to 17 (05.58 588.38 583.38 5.20 131.-2 14.5 600.16 1 PVC 9.5 to 14.5 604.84 590.66 585.66 4.68 BL-3 23.0 600.60 1 PVC 18 to 23 604.50 582.60 577.60 3.90 13L-4 14.5 599.76 I PVC 10 to 15 601.91 589.76 58%1.76 2.15 BL-5 21.0 599.76 I PVC 16 to 21 602.60 583.76 578.76 2.84 BL-6 16.5 597.74 1 PVC 11.5 to 16.5 601.83 586.24 581.24 4.09 BL-7 14.0 597.57 l IPVC 9 to 14 601.08 588.57 583.57 3.51 BL-8 18.1) 598.53 I PVC 13 to 18 602.29 585.53 580.53 3.76 BL.-9 12.5 599.75 7.5 to 12.5 602.75 592.25 587.25 3.00 BL-9 21.0 599.60 I PVC 16 to 21 602.49 583.60 578.60 2.89 29.0 599.65 1 PVC 24to29 600.36 575.65 570.65 0.71 BL-10 17.0 602.49 1 PVC 12 to 17 605.37 590.28 58528 2.88 Bl.-IOD 32.0 602.43 1 PVC 27 to 32 605.16 57543 570.43 2.73 BL-1 I rvc 16.5 597.47 lPVC 11.5 to 16.5 600.65 585.97 1 PVC 580.97 3.18 BL-llD 28.0 597,34 574.34 569.34 1.75 BL-12 17.0 598.03 I PVC 12 to 17 601.60 586.03 581.03 3.57 BL-121) 28.0 598.10 I PVC 23 to 28 599.87 575.10 570.10 1.77 CIA 1641 Pmentttitn 3.1
DRAFT Page 4 otf TABLE 1 MONITOIUNG WELL CONSSi KURC TiON SPECIFICATIONS EXELON GENERATION BRAIDWOOD STATION Well Horing Ground Well Well Screen Top ofRiser Screen Top Screen Battol" Stick Number Total Depth Suirface Diamneter Material Ilterval Elevation Elevation Elevation Up (ft BGS)1 (NWVD)) (inches) (ft BGS) (NGVD) (NGVD) (NC.VD) (ft AC.S)
BL,'13 15.0 598.07 'I PVC 10 to 15 601.37 588.07 583.07 3.30 Bl-13D 24.5 598.05 1 PVC 19.5 to 24.5 600.82 565.55 564.55 2.77 BL-14 18.0 59 9 I PVC 13 to 18 601.26 584.34 579.34 3.92 BIA14D 26.5 597.46 I 1P1VC 21.5 to 265 599.90 575.96 570.96 2.44 i3L-15 17.5 597.29 1 PVC 12.5 to 17.5 600.98 584.79 579.79 3.69 BL-151) 24.0 59754 1 PVC 19 to 24 598.50 578.54 573.64 0.96 BL-16 17.0 597.12 1 PVC 12to 17 60030 585.12 580.12 3.18 Bl.-16D 24.0 597.28 1 PVC 19 to 24 598.17 578.28 573.28 0.89 BL-17 14.5 597.01 1 PVC 9.5 to 14.5 597.62 587.51 582.51 0.61 BL-17D 24.0 597.01 i PVC 19 to 24 598.11 578.01 573.01 l.10 B1.-18 14.5 596.82 1 PVC 9.5 to 14.5 597.59 587.32 582.32 0.77 Bl'-19 9.0 594.94 1 PVC 4 to 9 595.55 590.94 585.94 0.61 BL-20D 28.0 596.89 1 PVC 23 to 28 600.45 57.3.89 568.89 3.56 p-1 14.5 594.90 1 PVC 9.5 TO 14.5 595.59 585.40 580.40 0.69 P-2 14.5 595.65 1 PVC 9.5 TO 14.; 596.27 586.15 581.15 0.62 P-2D 23.5 595.88 I PVC 18.5 to 23.5 596.55 577.38 572.38 0.h7 P-3 14.5. 595.69 1 I'VC 9.5 TO 14.5 596.26 586.19 581.19 0.57 P-4 14.5 -1 PVC 9.5 TO 14.5 597.14 * -
- 4 P-7 14.5 599.77 1 PVC 9.5 to 14.5 600.24 590.27 585.27 (0.47 P-8 14.5 595.49 1 PVC 9.5 to 14:5 596.24 585.99 580.99 0.75 P-9 14.5 598.55 I PVC 9.5 to 14.5 599.19 589.05 584.05 0.64 P-10 14.5 5P6.08 1 ;VC 3.5 to 14.5 .596.58 586.58 581.58 0.50 P-11 14.5 595.19 1 PVC 9.5 to 14.5 596.23 585.69 580.69 1.04 P-12 14.5 595.56 1 I'VC 9.5 to 14.5 596.13 586.06 581.06 0.57 CRA IM4I Pre, i,, i 3. 11
DRAFT Page 5 of 6 TABLE 1 MONITORING WELL CONSITRUCTiON SPECIFICATIONS EXELON GENERATION BRAIDWOOD STATION Well Boring Ground Well Well Screen Top of Riser Screen Top Screen Bottomn Stick Niunber Total Depth Surface Diameter Matcrial Interval Elevatio,, Elevation Elevattion Up (ft 1?GS)' (NeV t)) 2 (inches) (ft BGS) (NGVD) (NGVI)) (NGVD) (ft A GS)
P-13D 27.0 596.11 I PVC 22 to 27 598.76 574.11 569.11 2.65
'14 15.5 1 I'VC 10.5 to 15.5
- 4 P-14[) 28.0 vc 23 to 28 +
-1 1¶5.( 599.64 1 PVC 10 to 15 603.69 589.64 584.64 4.05 D-D1D 27.0 599.82 1 PVC 22 to 27 603.77 577.82 572.82 3.95 D-2 15.0 598.78 1 PVC 10 to 15 601.92 588.78 583.78 3.14 D-2D 27.0 598.65 I PVC 22 to 27 601.47 576.65 571.65 2.82 D-3 15.0 599.00 1 PVC Ill to 15 602.48 589.00 584.00 3.48 D-31) 27.0 598.91 1 pVC 22 to 27 602.22 576.91 571.91 3.31 D-4 15.0 598.48 1 PVC 10 to 15 602.55 588.48 -83.48 4.07 D-5 15.0 598.58 1 PVC 10 to 15 602.27 588.58 583.58 3.69 5-1 14.5 594.99 1 PVC 9.5 to 14.5 595.60 585.49 580.49 0.61
.S-1D 28.0 1 I'VC 23 to 28 8-2 14.5 592.72 I PVC 9.5 to 14.5 593.32 583.22 578.22 0.60 821) 23.5 592.72 1 PVC 18.5 to 23.5 593.98 574.22 569.22 1.26 5-3 14.5 592.65 1 I'VC 9.5 to 14.5 593.37 583.15 578.15 0.72 S94 14.5 594.23 1 PVC 9.5 to 14.5 594.63 584.73 579.73 0.40 S-4D 24.5 1 PVC 19.5 to 24.5 * '
- S-5 14.5 592.76 1 PVC 9.5 to 14.5 593.44 583.26 578.26 0.68 8-6 14.5 594.99 1 PVC 9.5 to 14.5 595.57 585.49 580.49 0.58 8-7 13.6 ' 1 PVC 8.6 to 1336 4
-71) 27.5
- PVC 22.5 to 27.5 '
C-1 14.5 590.7() 1 PVC 9.5 to 14.5 59535 581.20 576.20 4.65 (3-2 14.5 590.24 1 PVC 9.5 to 14.5 590.82 580.74 575.74 0.38 G-2D 24.0 1 PVC 19 to 24 *
- C;-3 14.5 5V2.31 ! *vC 9.5 to 14.5 592.93 582.84 577.84 0.59
- -1 14.0 595.27 1 PVC 9 to 14 596.25 586.27 581.27 0.98 F-1 D 24.0 595.27 1 PVC 19 to 24 596.19 576.27 571.27 0.92 (A URI841 ar..lifati.0 3 TI
V..
DRAFT P'age 6 of 6 TABLE t MONITORING WELL CONSTRUCTiUON SrECIFICATIONS EXELON GENERATION BRAIDWOOD STATION Well Boring Ground Well Well Screen Top of Riser Screen Top Screen Bottomn Stick Number Total Depth Surface Diameter Material Interval Elevatiom: Elevation Elevation UP (ft BGS)1 (N(;VD) (necles). (ft BGS) (NGVD) (NGVD) (NGVD) (ft AGS) '
1 -2D 25.0 594.05 1 PVC 20 to 2.5 597.26 574.05 569.05 3.21 F-31) 25.0 594.59 PVC 20 to 25 597.3i6 544.59 53Q.59 2.77 rFl) 29.5 1 PVC 24.5 to 29.5 F-5D 27.0 *1 PVC 22 to 27 4 F-6D 27.5 PVC 22.5 to 27.5 F-7D 28.0 I PVC 23 to 28 4 F-81 26.0 1 PVC 21 to 26 C-I 14.0 595.00 PVC 9 to 14 595.78 586.00 581.00 0.78 C-tD 24.0 595.00 1 PVC 19 to 24 595.87 576.00 571.00 (0.87 I
('-2 15.5 PVC 10.5 to 15.5
- 1 C-21) 27.5 44 PVC 22.5 to 27.5 A-l 15.0 PVC l0 to 15 A-1 D 25.0 PVC 20 to 25 Notes ft BGS - feet below ground surface 2 NGVD - National Geodetic Vertical Daturm PVC - polyvinyl chloride above ground surface Abandoned ground surface not yet shot, survey data incomplete CgA 16811 \ 3. rI
DRAFT Page I of 4 TABLE 2
SUMMARY
OF TRITIUM RESULTS IN MONITORING WELLS EXELON GENERATION BRAIDWOOD STATION Location Sample Name Samiple Date 3H-Tritium (pCilL)
A-I GW011106-MB-A-1 1/11/2006 33 A-ID GW011106-MB-A-ID 1/11/2006 60 BL-01 GW-111705-JK-B3L-01 11/17/2005 70 BL.02 GWV-111705-JK-BL-02 11/17/2005 156 BL-03 GW-111805-JK-BL-15 11/18/2005 0 BL-04 GW-1 1I805-JK-BL-14 11/18/2005 40 BL-05 GW-1 I 1805-JK-BL-13 11/18/2005 102 BL-06 GW-111805-JK-BL-12 11/18/2005 114 BL-07 GW-111805-JK-BL-11 11/18/2005 39 BL-08 GW-111805-]K-BL-10 11/18/2005 90 BL-09 GW-012506-JL-BL-9 1/25/2006 4809 BL-09D GW-012506-JL-BL-9D 1/25/2006 20383 BL-10 GW-010406-JEL-BL-10 1/4/2006 -104 BL.-OD GW-010406-]L-BL-I OD 1/4/2006 7535 BL-11 GW-010306-JL-BL- 11 1/3/2006 13 BL-1IV GW-010306-JL-BL-lI D 1/3/2006 -27 Bl.-12 GW-010306-Jl.-BL-12 1/3/2006 -39 BL-12D GW-010306-JL-BL-12D 1/3/2006 -35 BL-13 GW-010306-JL-BL-13 1/3/2006 -16 BL-13D GW-010306-JL-BL-13D 1/3/2006 9 BL-14 GW-010306-JL-BL-14 1/3/2006 -37 BL-14D GW-010306-JL-13L-14D 1/3/2006 -91 BL-15 GW-010306-JL-BL-15 1/3/2006 146 BL-15D GW-010306-JL-BL-15D 1/3/2006 -49 BL-16 GU/-010306-JL-BL-16 1/3/2006 3364 BL-16D GW-010306-JL-BL-16D 1/3/2006 -91 BL-17 GW-010306-JL-BL-17 1/3/2006 -44 BL.- 7D GW-010306-JL-BL-17D 1/3/2006 -126 BL-18 GWV-120105-DS-BL-IS 12/1/2005 108 BL-19 GW-120105-DS-BL-19 12/1/2005 37 BL-20D GIV-010406-Jl-BL-20V 1/4/2006 -117 C-l GW-010306-JL-C-1 1/3/2006 -80 C-1D GV-01 0306-iL-C-ID 1/3/2006 -140 C-2 GW-012406-MB-C-2 1/24/2006 48 C-2D GW-012406-MB-C-2D 1/24/2006 147 D-l GW-010406-JI.-D-I 1/4/2006 -13 D-I D GIV-010406-JL-D-ID 1/4/2006 -141 D-2 GW-010406-JL-D-2 1/4/2006 -165 D2D GIV-010406-JL-D-2D 1/4/2006 -36 D-3 GW-010406-JL-D-3 1/4/2006 -168 D-3D GIV-010406-JL-D-3D 1/4/2006 5tlO D-4 GWV-120605-JRB-D-4 12/6/2005 91 D-5 GIV-120205-MK-D-5 12/2/2005 73 Ditch at Culvert Ditch at Culvert-12/22/05 12/22/2005 1007 Ditch by Alpha Gate Ditch by Alpha Gate-01 /12/06 1/12/2006 -30 GW-010306-jL-F-1 1/3/2006 -44 i--lD GW-010306-JL-F-ID 1/3/2006 -56 CRAtN-W~r-,,jt 6., , *r
DRAFI' Page 2of4 TABLE 2
SUMMARY
OF TRITIUM RESULTS IN MONITORING WELLS EXELON GENERATION BRAIDWOOD STATION Location Saniple NamC Sample Date 3H-Tritiuln (pCilL) f:-2D GW-0O 1206-MB-F-2D 1/12/2006 546 F-3D GW-01 1206-MB-F-3D 1/12/2006 1689 F4D GW-012406-MB-F-4D 1/24/2006 -22 F-5D GW-012406-MB-F-5D 1/24/2006 1512 F-6D GW-012406-MB-F-6D 1/24/2006 689 F-7D GW-012406-lB-F-7D 1/24/2006 575 F-SD GW-012406-MB-F-&D 1/24/2006 872 G-l G;Wv-120605-JL-G-1 12/6/2005 133 G-2 GW-120605-JI.-G-2 12/6!2005 87 G-3 GW-120605-J1.-G-3 12/6/2005 &I MW-I01 GW-111505-JK-17-Dup 11/15/2005 162 MW-101 GW-111505-JK-17 11/15/2005 157 MWV-102 MW-102 3/24/2005 58 MW-103 GW-1 11 505-JK-13-Dup 11/15/2005 1970 MW-103 GW-111505-JK-13 11/15/2005 2497 MW-104 MW-104 7/28/2005 142 MW-105 GW-010406-JL-MW-I05 1/4/2006 169 MW-105D GW-010406-JL-MW-105D 1/4/2006 -120 MW-106 GW-010406-lL-MW-106 1/4/2006 -35 MW-106D GVV-010406-JL-MIV-106D 1/4/2006 -25 MW-107 GW-111605-JK-19 11/15/2005 269 MW-108 GW-1 11605-JK-20 11/15/2005 91 MW-109 GW-093005-DC-03 9/30/2005 305 MW-110 GW-010406-JK-MWII 1O 1/4/2006 -104 MlW-ill G;V-010406-jl-MW-111 1/4/2006 -78 MW-llID GWO10906-MB-MWI 1D 1/9/2006 -66 MW-112 GWV-010406-JL-MW-112 1/4/2006 -127 MWV-112D GW010906-MPMWI12D 1/9/2006 -111 MW-1 13 GW-010306-JL-MW-113 1/3/2006 4008 MW-113D GW-010306-JL-MW-1 13D 1/3/2006 4772 P-I GW-120105-DS-I-1 12/1/2005 2484 P-10 GW-120605-JL-P-10 12/6/2005 1 23 P-ll GW-120605-JL-P-1 1 12/6/2005 1476 P-12 GW-120605-JL-P-12 12/6/2005 1622 P-13D GW-012506-JL-P-13D 1/25/2006 217122 P-14 GW-012406-tvB-P-14 1/24/2006 2537 P-14D GW-012406-MB-P-14D 1/24/2006 2388 P-2 GW-010306-JL-P-2 1/3/2006 2045 P-2D GW-0I0306-JL-P-2D 1/3/2006 2384 P-3 GW-120205-MK-P-3 12/2/2005 3258 P.4 GW-012506-IL-P-4 1/25/2006 j 9588 i P4D GWV-01 2506-IL-P4D 1/25/2006 38965 i t
P-5 GW-010306-JL-P-5 1/3/2006 6166 i
P-5D GWV-010306-JL-P-5D 1/3/2006 2165 i'-6 GIV-01 1806-MB-P-6 1/I 8/2006 110 i
>-7 GW-120105-DS-P-7 12/1/2005 1210 II 1P-S GW-120605-J.-P-8 12/6/2005 .2212 C'RA R-44)wsjlioJT
DRAlrr Page 3 of4 TABLE 2
SUMMARY
OF TRITIUM RESULTS IN MONITORING WELLS EXELON GENERATION BRAIDWOOD STATION Location Sam:ple 'Nante Sample Date 3H-Tritiutm (pCi/L)
P.9 GW-1213.05-JL-P-9-recount 12/13/2005 27 P-9 GW-121305-JL-P-9 12/13/2005 111 PW-6P Pond-12/08/05 12/8/2005 142 IRW-1 RW-1 -12/04/05 12/4/2005 7855 RVV-2 GW-121305-JL-RIV2t 20' 12/13/2005 171166 RW-2 CGW- 121305-JL-RMV2325; 12/13/2005 246442 RW-2 GW-121305-JI.-RW26j10 12/13/2005 54111 RW-3 GW-1 20205-Ji.-RW-3 12/2/2005 197 RW-4 GW-1 20205-JL-RlV-4 12/2/2005 380 S-1 GW-120605-)L-S-1 12/6/2005 83 S-2 GW-010306-JL---2 1/3/2006 62 S-2D GIV-010306-JL-S-2D 1/3/2006 -2 S-3 GW-120605-IL-S-3 12/6/2005 57 S4 GW-120605-JI.,-S-4 12/6/2005 1086 S-5 GW-1 20605-iL-S-5 12/6/2005 1874 S-6 GW- 120605-JL-S-6 12/6/2005 411 S7 GW-012406-MP-S-7 1/24/2006
- 1373 S-7D GW-01 406-MB-S-7D 1/24/2006 1546 SG-1 SG-I 7/28/2005 61.3 SG-2 S(G-2 7/28/2005 1970 SG-3 SC-3 7/28/2005 -21.4 SW-1 Lake #- I 11/30/05 11/30/2005 2464 SW-2 GW-012506- L-SW-2 1/25/2006 2441 SW-3 GW-120205-NWV-FTL-Laklc 12/2/2005 96 SW-4 GW-120205-SE-FTL- Lake 12/2/2005 8f3 VB-1 VB-1 -05/27/2005 5/27/2005 51295 VB^1-1 GW-010406-JL-VBl-l 1/4/2006 425 VB-I-lD GW-010406-JL-VB11-I D 1/4/2006 -132 YB-1-2 GIV-111705-JK-VBI-2 11/17/2005 337 VB-1-2D GW-01 1306-M13-VB1-2D 1/13/2006 23S VB-1-3 CGW-111605-DC-VBI-3 11/15/2005 206 VB-1-3D I-MB-V B-3D)
GI:-01 1o 1/13/2006 19431 VB-1-4 GWV-1 I1605-DC-VBI-4 11/15/2005 384 VB-1-4D GW--011306-MB-VB1-4D 1/13/2006 7424 VB-1-5 GW-111605-DC-VB1-5 11/15/2005 130 VB-1-;D GW-011306-JL-VBI-5D 1/13/2006 22928 VB-1-6 GIV-112205-JL-VBI-6 11/22/2005 95 VB-1-6D GWV-01'306-Jl-VBI-6D 1/13/2006 41 VB-1-7 GWV-I 12205-I.-VB1-7 11/22/2005 140 VB-1-7D GW010906-NB-VBI-7D 1/9/2006 -116 VB-1-8 GV-l 12205-JL-VB. -S 11/22/2005 57 VB-1-8D GWO10906-.%lB-VBI-SD 1/9/2006 10877 VB-1 -9 GW-112205-JL-VBI-9 11/22/2005 107 VB-1-9D GW-011306-MB-VBI-9D 1/13/2006 3370 VB-2-1 GW-111505-DC-VB2-1-Dup 11/15/2005 2.3S VB-2-2 GW-O] 0406-JL-VB2-2 1/4/2006 5232
'/B-2-2D GW-Ol 0406-JL-VB2-2D 1/4/2006 4037 CR, ltz541 r,,,-w- 3 -t-1
DRAFT Page 4 of 4 TABLE 2 SUM MARY OF TRITIUM RESULTS IN MONITORING WELLS EXELON GENERATION BRAIDWOOD STATION Location Snmple Name Sample Date 3H-Tritiuin (pCiIL)
VB-2-3 GW-1 11505-DC-VB2-3-Dup 11/15/2005 3460 VB-2-3 GW-I 11505-DC-VB2-3 11/15/2005 3940 VB-24 GW-1 11505-DC-VB2-4-Dup 11/ 15/2005 3350 VB-24 GW-1 11505-DC-VB2-4 11/15/2005 3664 VB-2-5 GW-010306-JL-VB2-5 1/3/2006 3834 VR-2-5D GW-010306-Jl,-VB2-5D 1/3/2006 102, VB-2-6 GW-010306-1I.-VB-2-6 1/3/2006 1412 VB-2-6D GCW-010306-JL-VB-2-6D 1/3/2006 44 VB-2-7 GW-010406-JL-VB2-7 1/4/2006 -60 VB-2-7D GW-010406-JI.-VB2-7D 1/4/2006 -53 VB-2-8 GW-121405-JS-VB-2-8 12/14/2005 -103 VB-2-9 GW-011206-MIB-VB2-9 1/12/2006 78 VB-2-9V) GW-011206-MB-VB2-9D 1/12/2006 -65 VB-3 V'B-3-05/11/2005 5/11/2005 1521 VB-3-1 GW-111505-DC-VB3-1 11/15/2005 5959 VB-3-1 GW-1 I 1.505-DC-VB3-1 -Dup 11 / 15/2005 5460 VB-3-10 GW-010306-JL-VB3-10 1/3/2006 12076 VB-3-1OD GW-010306-JlI-VB3-lOD 1/3/2006 108736 VB-3-2 GW-11150S-DC-VB3-2 11/15/2005 32830 VB-3-3 GW-1 11 605-DC-VB3-3 11/16/2005 43894 VB-3-4 GW-010306-JL-VB3-4 1/3/2006 29286 VB-3-4D GW-010306-JL-VB34D 1/3/2006 790 VB-3-5 GW-112205-JL-VB3-5 11/22/2005 95 VB-3-6 GV-1 12205-JL-VB3-6 11/22/2005 535,2 VB-3-7 GWV-010306-JL-VB3-7 1/3/2006 -126 VB-3-7D GW-010306-JL-VB3-7D 1/3/2006 -205 VB-3-s GIV-120205-MK-VB-3-8 12/2/2005 171 VB-3-9D GW-010406-JL-VB3-9D 1/4/2006 19605 CR.% t" 1l lrw.intelalm T-2
DRAFT Page 1 of 1 TABLE3
SUMMARY
OF TRITIUM RESULTS AT PRIVATE WELLS EXELON GENERATION BRAIDWOOD STATION Location Samnple Date 3H-Tritiumi (pCi/L)
PW-1 11/30/2005 -26 PW-2 11/30/2005 48 PW-3 11/30/2005 25 PW-4 12/2/2005 43 PW-5 1/19/2006 -12 PW-7 12/7/2005 -58 PW-8 12/8/2005 1367 PW-9 12/5/2005 142 PW-10 12/7/2005 72 PW-ll 12/5/2005 99 PW-12 12/7/2005 44 PW-13 12/7/2005 -62 PW-14 12/14/2005 -118 PW-15 12/14/2005 -51 CKlA lhS41 Pre;..wlj lion 3 - 17