ML18354B066

Summary of Monitoring Well Installation Details

ML18354B066
Person / Time
Site:	Peach Bottom
Issue date:	12/20/2018
From:	Exelon Generation Co
To:	Office of Nuclear Reactor Regulation
Shared Package
ML18354B113	List: ML18354B061 ML18354B066
References
EPID L-2018-RNW-0013
Download: ML18354B066 (227)

Text

GHD I Hydrogeologic Investigation Report 111137316 (1)

Page 1of1 TABLE 4.1

SUMMARY

OF MONITORING WELL INSTALLATION DETAILS PEACH BOTTOM ATOMIC POWER STATION DEL TA, PENNSYLVANIA Hydrogeologic Sample Surface Reference Installation Boring Screened Interval Well Unit Location North East Elevation Elevation Date Tota/Depth To Bottom To Bottom Construction Screened or Open 1

(UTM Coordinates 1 ) (ft above C.D.) ni (ft above C.D.) (ft bgs) " (ft bgs) (ft above C.D.)

MW-PB-1 14440834.8 1283000.48 292.71 293.56 04/28/06 100 25 100 267.71 192.71 6-1nch Sleel Open Borehole 141 Bedrock MW-PB-2 14441781 .9 1283476.56 134.52 133.71 05/10/06 50 20 50 114.52 84 52 2-rnch PVC Screen Bedrock MW-PB-3 14441027.5 1283983.87 133.07 132.37 05110/06 50 30 50 103.07 83.07 2-inch PVC Screen Bedrock MW-PB-4 14441840.4 1284107.77 115.72 115.02 05/09/06 30 10 30 105.72 85.72 2-lnch PVC Screen Overburden MW-PB-5 14442808.7 1283465.20 11811 117.58 05/04/06 25 10 25 108.11 93.11 2-lnch PVC Screen Overburden MW-PB-6 14442421 .2 1284574.34 114.94 114.06 05/03/06 25 5 25 109.94 89_94 2-rnch PVC Screen Overburden MW-PB-7 14441188.7 128440412 115.73 115.15 05/04/06 25 5 25 110.73 90.73 2-rnch PVC Screen Overburden MW-PB-8 14440723.5 1284405.41 11491 114.26 05/03/06 25 5 25 109.91 89.91 2-rnch PVC Screen Overburden MW-PB-9 14439416.5 1285415.82 12009 119.50 05/01/06 30 10 30 110.09 90.09 2-rnch PVC Screen Overburden MW-PB-10 14440628.18 1284097.72 116.10 115.50 05/02/06 25 5 25 111 .10 9110 2-inch PVC Screen Overburden MW-PB-11 14441414.7 1284103.59 115.94 115.32 05/08/06 25 5 25 110.94 9094 2-lnch PVC Screen Overburden MW-PB-12 14441992.2 1283913.22 116.51 115.78 05/05/06 35 20 35 96.51 81 .51 2-inch PVC Screen Overburden MW-PB-13 14441942.6 1283546.59 133 72 132.92 05/09/06 28 8 28 125.72 105 72 2-inch PVC Screen Bedrock MW-PB-14 14440485 1283931.43 120.44 119.77 05/02/06 30 10 30 110.44 90.44 2-inch PVC Screen Overburden MW-PB-15 14440794 1284368.68 115.87 114.98 10/20/08 19 5 19 110.87 96.87 2-rnch PVC Screen Overburden MW-PB-16 14440781 .5 1284374.52 115.80 114.91 10/17/08 105 25 105 90.BO 10.BO 6-inch Steel Open Borehole 141 Bedrock MW-PB-17 14440868.2 1284331.45 115_60 114.63 10/14/08 105 26.5 105 89.10 10.60 6-lnch Steel Open Borehole 1' 1 Bedrock MW-PB-18 14440864.03 1284333.49 115.65 114.75 10/15/08 20.5 5 20 110.65 9565 2-lnch PVC Screen Overburden MW-PB-19 14441878 04 1283628.37 134.79 134.14 10/24/08 50 24 50 110.79 84.79 6-inch Steel Open Borehole 141 Bedrock MW-PB-20 14441721 3 1284035.95 115.78 115.02 10/27/08 28 8 28 107.78 87.78 2-inch PVC Screen Overburden MW-PB-21 14441710_8 1284139.17 115.78 114.99 10/29/08 32 12 32 103.78 83.78 2-lnch PVC Screen Overburden MW-PB-22 14441943 1 1283983.67 115.92 115.23 10/30/08 33 12 32 103.92 83.92 2-lnch PVC Screen Overburden MW-PB-23 14441783.17 1283616.31 134.63 134.13 04/30/09 16.5 6.5 16.5 128.13 118.13 2-inch PVC Screen Overburden MW-PB-24 14441889.24 1283806.22 115.16 114.83 07/28/09 8.0 4.0 8.0 111 .16 107.16 2-inch PVC Screen Overburden MW-PB-25 14441861.59 1283811.33 114.97 114.53 07/28/09 6.5 4.5 6.5 110.47 108.47 2-inch PVC Screen Overburden MW-PB-26 14441813.71 1283831 .06 115.23 114.83 07/28/09 20.5 10.5 20.5 104.73 94.73 2-rnch PVC Screen Overburden MW-PB-27 14441842.72 1283819 23 115 50 115.28 02/16/10 46 8.0 46 107.50 69.50 4-inch Steel Open Borehole Bedrock MW-PB-28 14441787.01 1283619.69 134.49 134.42 02/09/10 48 16.5 48 117.99 86.49 4-inch Sleel Open Borehole Bedrock MW-PB-29 14441407.64 1284025.24 115.30 115.05 05/26/11 10 4.5 10 110.80 105.BO 2-inch PVC Screen Overburden MW-PB-30 14441373.26 1284039,50 115 27 114.69 05/26/11 15 5.0 15 110.27 100.27 2-inch PVC Screen Overburden MW-PB-31 14441303.61 1284053.19 115.59 114.73 05/26111 8 3.0 8 112 59 107.59 2-inch PVC Screen Overburden Notes:

1) Universal Transverse Mercator (UTM) , Zone 18, NAO 83.

2) fl above C.D feel above Conowrngo Dalum

3) fl bgs - feet below ground surface.

4) Ouler sleel casing lo minimum 5 feel lnlo bedrock . open bedrock well lo terminal deplh.

GHD 11137316

TABLE 4.2 Page 1of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-1 04/25/2016 293.56 64.11 229.45 MW-PB-1 07/25/2016 293.56 65.66 227 .90 MW-PB-1 10/10/2016 293.56 71.17 222.39 MW-PB-1 01/18/2017 293.56 71.00 222.56 MW-PB-1 08/14/2017 293.56 73.87 219.69 MW-PB-1 05/10/2017 293.56 72.95 220.61 MW-PB-10 02/01/2016 115.5 6.61 108.89 MW-PB-10 04/25/2016 115.5 6.25 109.25 MW-PB-10 07/25/2016 115.5 5.95 109.55 MW-PB-10 10/10/2016 115.5 6.57 108.93 MW-PB-10 01/18/2017 115.5 6.13 109.37 MW-PB-10 08/14/2017 115.50 5.69 109.81 MW-PB-10 05/10/2017 115.50 5.56 109.94 MW-PB-11 02/01/2016 115.32 4.42 110.90 MW-PB-11 04/25/2016 115.32 4.98 110.34 MW-PB-11 07/25/2016 115.32 5.10 110.22 MW-PB-11 10/10/2016 115.32 5.22 110.10 MW-PB-11 01/18/2017 115.32 5.78 109.54 MW-PB-11 08/14/2017 115.32 5.95 109.37 MW-PB-11 04/11/2017 115.32 4.35 110.97 MW-PB-12 02/01/2016 115.78 5.69 110.09 MW-PB-12 04/25/2016 115.78 5.65 110.13 MW-PB-12 07/25/2016 115.78 5.52 110.26 MW-PB-12 11/30/2016 115.78 5.55 110.23 MW-PB-12 01/18/2017 115.78 5.49 110.29 MW-PB-12 08/14/2017 115.78 5.36 110.42 MW-PB-12 05/09/2017 115.78 5.56 110.22 MW-PB-13 02/01/2016 132.92 10.68 122.24 MW-PB-13 04/25/2016 132.92 11.91 121.01 MW-PB-13 07/25/2016 132.92 12.07 120.85 MW-PB-13 10/10/2016 132.92 12.76 120.16 MW-PB-13 01/18/2017 132.92 11.98 120.94 MW-PB-13 08/14/2017 132.92 11.81 121.11 MW-PB-13 05/09/2017 132.92 12.32 120.60 MW-PB-13 04/11/2017 132.92 12.40 120.50 MW-PB-13 02/17/2017 132.92 0.53 132.39 GHD 11137316 (1)

TABLE 4.2 Page 2of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-14 04/25/2016 119.77 9.72 110.05 MW-PB-14 07/25/2016 119.77 9.75 110.02 MW-PB-14 10/10/2016 119.77 9.92 109.85 MW-PB-14 01/18/2017 119.77 9.82 109.95 MW-PB-14 08/14/2017 119.77 9.67 110.10 MW-PB-14 05/10/2017 119.77 9.61 110.16 MW-PB-15 02/01/2016 114.98 6.55 108.43 MW-PB-15 04/25/2016 114.98 6.03 108.95 MW-PB-15 07/25/2016 114.98 5.80 109.18 MW-PB-15 10/10/2016 114.98 6.29 108.69 MW-PB-15 01/18/2017 114.98 6.50 108.48 MW-PB-15 08/14/2017 114.98 5.02 109.96 MW-PB-15 05/10/2017 114.98 5.00 109.98 MW-PB-16 02/01/2016 114.91 6.71 108.20 MW-PB-16 04/25/2016 114.91 6.30 108.61 MW-PB-16 07/25/2016 114.91 5.85 109.06 MW-PB-16 10/10/2016 114.91 6.05 108.86 MW-PB-16 01/18/2017 114.91 5.93 108.98 MW-PB-16 08/14/2017 114.91 5.05 109.86 MW-PB-16 05/10/2017 114.91 5.09 109.82 MW-PB-17 01/18/2017 114.63 5.90 108.73 MW-PB-17 08/14/2017 114.63 4.73 109.90 MW-PB-18 01/18/2017 114.75 6.15 108.60 MW-PB-18 08/14/2017 114.75 4.61 110.14 MW-PB-19 02/01/2016 134.14 17.91 116.23 MW-PB-19 04/25/2016 134.14 18.32 115.82 MW-PB-19 07/25/2016 134.14 18.39 115.75 MW-PB-19 08/27/2016 134.14 18.31 115.83 MW-PB-19 10/10/2016 134.14 18.21 115.93 MW-PB-19 01/18/2017 134.14 17.48 116.66 MW-PB-19 08/14/2017 134.14 18.22 115.92 MW-PB-19 05/09/2017 134.14 18.20 115.94 MW-PB-19 02/17/2017 134.14 18.08 116.06 GHD 11137316 (1)

TABLE 4.2 Page 3of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-2 02/01/2016 133.71 7.21 126.50 MW-PB-2 04/25/2016 133.71 1.14 132.57 MW-PB-2 07/25/2016 133.71 2.10 131.61 MW-PB-2 10/10/2016 133.71 3.26 130.45 MW-PB-2 01/18/2017 133.71 0.76 132.95 MW-PB-2 08/14/2017 133.71 0.7 133.0 MW-PB-2 05/09/2017 133.71 0.79 132.92 MW-PB-2 02/17/2017 133.71 0.68 133.03 MW-PB-20 02/01/2016 115.02 5.85 109.17 MW-PB-20 04/25/2016 115.02 5.70 109.32 MW-PB-20 07/25/2016 115.02 5.42 109.60 MW-PB-20 10/10/2016 115.02 7.90 107.12 MW-PB-20 01/18/2017 115.02 5.88 109.14 MW-PB-20 08/14/2017 115.02 5.03 109.99 MW-PB-20 05/09/2017 115.02 5.58 109.44 MW-PB-21 02/01/2016 114.99 6.84 108.15 MW-PB-21 04/25/2016 114.99 6.55 108.44 MW-PB-21 07/25/2016 114.99 6.25 108.74 MW-PB-21 10/10/2016 114.99 6.67 108.32 MW-PB-21 01/18/2017 114.99 6.88 108.11 MW-PB-21 08/14/2017 114.99 0 115.0 MW-PB-21 05/09/2017 114.99 6.18 108.81 MW-PB-21 04/11/2017 114.99 5.82 109.17 MW-PB-22 02/01/2016 115.23 6.01 109.22 MW-PB-22 04/25/2016 115.23 5.93 109.30 MW-PB-22 07/25/2016 115.23 5.69 109.54 MW-PB-22 10/10/2016 115.23 6.05 109.18 MW-PB-22 01/18/2017 115.23 6.64 108.59 MW-PB-22 08/14/2017 115.23 5.46 109.77 MW-PB-22 05/09/2017 115.23 5.58 109.65 GHD 11137316 (1)

TABLE 4.2 Page 4of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-24 02/01/2016 114.83 4.71 110.12 MW-PB-24 03/03/2016 114.83 4.88 109.95 MW-PB-24 03/29/2016 114.83 5.02 109.81 MW-PB-24 04/05/2016 114.83 5.09 109.74 MW-PB-24 04/12/2016 114.83 4.85 109.98 MW-PB-24 04/19/2016 114.83 4.96 109.87 MW-PB-24 04/25/2016 114.83 4.98 109.85 MW-PB-24 05/02/2016 114.83 4.82 110.01 MW-PB-24 05/11/2016 114.83 4.75 110.08 MW-PB-24 05/17/2016 114.83 4.89 109.94 MW-PB-24 05/25/2016 114.83 4.69 110.14 MW-PB-24 06/01/2016 114.83 4.65 110.18 MW-PB-24 06/08/2016 114.83 4.81 110.02 MW-PB-24 06/15/2016 114.83 4.92 109.91 MW-PB-24 06/22/2016 114.83 4.88 109.95 MW-PB-24 06/29/2016 114.83 4.94 109.89 MW-PB-24 07/06/2016 114.83 4.72 110.11 MW-PB-24 07/12/2016 114.83 4.76 110.07 MW-PB-24 07/19/2016 114.83 4.89 109.94 MW-PB-24 07/25/2016 114.83 4.76 110.07 MW-PB-24 08/04/2016 114.83 4.70 110.13 MW-PB-24 08/09/2016 114.83 4.66 110.17 MW-PB-24 08/16/2016 114.83 4.83 110.00 MW-PB-24 08/23/2016 114.83 4.70 110.13 MW-PB-24 08/27/2016 114.83 4.88 109.95 MW-PB-24 09/07/2016 114.83 4.95 109.88 MW-PB-24 09/13/2016 114.83 5.11 109.72 MW-PB-24 09/20/2016 114.83 4.78 110.05 MW-PB-24 09/27/2016 114.83 5.02 109.81 MW-PB-24 10/10/2016 114.83 4.90 109.93 MW-PB-24 11/14/2016 114.83 4.94 109.89 MW-PB-24 11/30/2016 114.83 3.90 110.93 MW-PB-24 01/18/2017 114.83 4.77 110.06 MW-PB-24 09/11/2017 114.83 4.70 110.13 MW-PB-24 08/14/2017 114.83 4.71 110.12 MW-PB-24 07/11/2017 114.83 4.69 110.14 MW-PB-24 06/15/2017 114.83 4.72 110.11 MW-PB-24 05/09/2017 114.83 4.68 110.15 MW-PB-24 04/24/2017 114.83 4.82 110.01 MW-PB-24 04/17/2017 114.83 4.76 110.07 MW-PB-24 04/12/2017 114.83 4.63 110.20 MW-PB-24 04/03/2017 114.83 4.59 110.24 MW-PB-24 03/27/2017 114.83 4.75 110.08 GHD 11137316 (1)

TABLE 4.2 Page 5of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-24 03/13/2017 114.83 4.88 109.95 MW-PB-24 03/06/2017 114.83 4.88 109.95 MW-PB-24 02/27/2017 114.83 4.91 109.92 MW-PB-24 02/21/2017 114.83 4.95 109.88 MW-PB-24 02/17/2017 114.83 4.92 109.91 MW-PB-25 02/01/2016 114.53 4.52 110.01 MW-PB-25 03/03/2016 114.53 4.60 109.93 MW-PB-25 03/29/2016 114.53 4.74 109.79 MW-PB-25 04/05/2016 114.53 4.81 109.72 MW-PB-25 04/12/2016 114.53 4.59 109.94 MW-PB-25 04/19/2016 114.53 4.70 109.83 MW-PB-25 04/25/2016 114.53 4.75 109.78 MW-PB-25 05/02/2016 114.53 4.54 109.99 MW-PB-25 05/11/2016 114.53 4.42 110.11 MW-PB-25 05/17/2016 114.53 4.69 109.84 MW-PB-25 05/25/2016 114.53 4.41 110.12 MW-PB-25 06/01/2016 114.53 4.44 110.09 MW-PB-25 06/08/2016 114.53 4.54 109.99 MW-PB-25 06/15/2016 114.53 4.67 109.86 MW-PB-25 06/22/2016 114.53 4.65 109.88 MW-PB-25 06/29/2016 114.53 4.68 109.85 MW-PB-25 07/06/2016 114.53 4.49 110.04 MW-PB-25 07/12/2016 114.53 4.52 110.01 MW-PB-25 07/19/2016 114.53 4.71 109.82 MW-PB-25 07/25/2016 114.53 4.47 110.06 MW-PB-25 08/04/2016 114.53 4.27 110.26 MW-PB-25 08/09/2016 114.53 4.32 110.21 MW-PB-25 08/16/2016 114.53 4.53 110.00 MW-PB-25 08/23/2016 114.53 4.35 110.18 MW-PB-25 08/27/2016 114.53 4.56 109.97 MW-PB-25 09/07/2016 114.53 4.67 109.86 MW-PB-25 09/13/2016 114.53 4.87 109.66 MW-PB-25 09/20/2016 114.53 4.65 109.88 MW-PB-25 09/27/2016 114.53 4.87 109.66 MW-PB-25 10/10/2016 114.53 4.64 109.89 MW-PB-25 11/14/2016 114.53 4.76 109.77 MW-PB-25 11/30/2016 114.53 4.41 110.12 MW-PB-25 01/18/2017 114.53 4.53 110.00 MW-PB-25 09/11/2017 114.53 4.43 110.10 MW-PB-25 08/14/2017 114.53 4.41 110.12 MW-PB-25 07/11/2017 114.53 4.41 110.12 MW-PB-25 06/15/2017 114.53 4.48 110.05 GHD 11137316 (1)

TABLE 4.2 Page 6of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-25 05/09/2017 114.53 4.40 110.13 MW-PB-25 04/24/2017 114.53 4.51 110.02 MW-PB-25 04/17/2017 114.53 4.68 109.85 MW-PB-25 04/12/2017 114.53 4.38 110.15 MW-PB-25 04/03/2017 114.53 4.29 110.24 MW-PB-25 03/27/2017 114.53 4.40 110.10 MW-PB-25 03/20/2017 114.53 4.29 110.24 MW-PB-25 03/13/2017 114.53 4.60 109.90 MW-PB-25 03/06/2017 114.53 4.62 109.91 MW-PB-25 02/27/2017 114.53 4.66 109.87 MW-PB-25 02/21/2017 114.53 4.62 109.91 MW-PB-25 02/17/2017 114.53 4.68 109.85 MW-PB-25 02/02/2017 114.53 4.62 109.91 MW-PB-26 02/01/2016 114.83 4.70 110.13 MW-PB-26 03/03/2016 114.83 4.72 110.11 MW-PB-26 03/29/2016 114.83 4.93 109.90 MW-PB-26 04/05/2016 114.83 5.04 109.79 MW-PB-26 04/12/2016 114.83 4.75 110.08 MW-PB-26 04/19/2016 114.83 4.85 109.98 MW-PB-26 04/25/2016 114.83 4.91 109.92 MW-PB-26 05/02/2016 114.83 4.72 110.11 MW-PB-26 05/11/2016 114.83 4.54 110.29 MW-PB-26 05/17/2016 114.83 4.81 110.02 MW-PB-26 05/25/2016 114.83 4.54 110.29 MW-PB-26 06/01/2016 114.83 4.49 110.34 MW-PB-26 06/08/2016 114.83 4.60 110.23 MW-PB-26 06/15/2016 114.83 4.75 110.08 MW-PB-26 06/22/2016 114.83 4.74 110.09 MW-PB-26 06/29/2016 114.83 4.86 109.97 MW-PB-26 07/06/2016 114.83 4.58 110.25 MW-PB-26 07/12/2016 114.83 4.65 110.18 MW-PB-26 07/19/2016 114.83 4.80 110.03 MW-PB-26 07/25/2016 114.83 4.61 110.22 MW-PB-26 08/04/2016 114.83 4.36 110.47 MW-PB-26 08/09/2016 114.83 4.42 110.41 MW-PB-26 08/16/2016 114.83 4.74 110.09 MW-PB-26 08/23/2016 114.83 4.45 110.38 MW-PB-26 09/07/2016 114.83 4.80 110.03 MW-PB-26 09/13/2016 114.83 4.99 109.84 MW-PB-26 09/20/2016 114.83 4.87 109.96 MW-PB-26 09/27/2016 114.83 5.06 109.77 MW-PB-26 10/10/2016 114.83 4.78 110.05 GHD 11137316 (1)

TABLE 4.2 Page 7of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-26 11/14/2016 114.83 4.92 109.91 MW-PB-26 11/30/2016 114.83 4.76 110.07 MW-PB-26 01/18/2017 114.83 4.43 110.40 MW-PB-26 09/11/2017 114.83 4.58 110.25 MW-PB-26 08/14/2017 114.83 4.51 110.32 MW-PB-26 07/11/2017 114.83 4.51 110.32 MW-PB-26 06/15/2017 114.83 4.58 110.25 MW-PB-26 05/09/2017 114.83 4.45 110.38 MW-PB-26 04/24/2017 114.83 4.51 110.32 MW-PB-26 04/17/2017 114.83 4.56 110.27 MW-PB-26 04/12/2017 114.83 4.36 110.47 MW-PB-26 04/03/2017 114.83 4.30 110.50 MW-PB-26 03/27/2017 114.83 4.51 110.32 MW-PB-26 03/20/2017 114.83 4.37 110.46 MW-PB-26 03/13/2017 114.83 4.86 109.97 MW-PB-26 03/06/2017 114.83 4.9 109.93 MW-PB-26 02/27/2017 114.83 4.91 109.92 MW-PB-26 02/21/2017 114.83 4.86 109.97 MW-PB-27 02/01/2016 115.28 5.13 110.15 MW-PB-27 03/03/2016 115.28 4.76 110.52 MW-PB-27 03/29/2016 115.28 4.98 110.30 MW-PB-27 04/05/2016 115.28 5.12 110.16 MW-PB-27 04/12/2016 115.28 4.76 110.52 MW-PB-27 04/19/2016 115.28 4.91 110.37 MW-PB-27 04/25/2016 115.28 4.95 110.33 MW-PB-27 05/02/2016 115.28 5.01 110.27 MW-PB-27 05/11/2016 115.28 4.59 110.69 MW-PB-27 05/17/2016 115.28 4.95 110.33 MW-PB-27 05/25/2016 115.28 4.72 110.56 MW-PB-27 06/01/2016 115.28 4.66 110.62 MW-PB-27 06/08/2016 115.28 4.61 110.67 MW-PB-27 06/15/2016 115.28 4.72 110.56 MW-PB-27 06/22/2016 115.28 4.63 110.65 MW-PB-27 06/29/2016 115.28 4.86 110.42 MW-PB-27 07/06/2016 115.28 4.61 110.67 MW-PB-27 07/12/2016 115.28 4.76 110.52 MW-PB-27 07/19/2016 115.28 4.67 110.61 MW-PB-27 07/25/2016 115.28 4.69 110.59 MW-PB-27 08/04/2016 115.28 4.21 111.07 MW-PB-27 08/09/2016 115.28 4.40 110.88 MW-PB-27 08/16/2016 115.28 4.88 110.40 MW-PB-27 08/23/2016 115.28 4.50 110.78 GHD 11137316 (1)

TABLE 4.2 Page 8of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-27 09/07/2016 115.28 4.56 110.72 MW-PB-27 09/13/2016 115.28 5.15 110.13 MW-PB-27 09/20/2016 115.28 5.15 110.13 MW-PB-27 09/27/2016 115.28 5.09 110.19 MW-PB-27 10/10/2016 115.28 4.98 110.30 MW-PB-27 11/14/2016 115.28 5.17 110.11 MW-PB-27 11/30/2016 115.28 5.00 110.28 MW-PB-27 01/18/2017 115.28 5.00 110.28 MW-PB-27 09/11/2017 115.28 4.62 110.66 MW-PB-27 08/14/2017 115.28 4.55 110.73 MW-PB-27 07/11/2017 115.28 4.55 110.73 MW-PB-27 06/15/2017 115.28 4.72 110.56 MW-PB-27 05/09/2017 115.28 4.60 110.68 MW-PB-27 04/24/2017 115.28 4.9 110.4 MW-PB-27 04/17/2017 115.28 4.72 110.56 MW-PB-27 04/12/2017 115.28 4.32 110.96 MW-PB-27 04/03/2017 115.28 4.31 110.97 MW-PB-27 03/27/2017 115.28 4.70 110.60 MW-PB-27 03/20/2017 115.28 4.60 110.68 MW-PB-27 03/13/2017 115.28 5.13 110.15 MW-PB-27 03/06/2017 115.28 5.19 110.09 MW-PB-27 02/27/2017 115.28 5.23 110.05 MW-PB-27 02/21/2017 115.28 5.05 110.23 MW-PB-28 02/01/2016 134.42 20.41 114.01 MW-PB-28 04/25/2016 134.42 20.66 113.76 MW-PB-28 07/25/2016 134.42 20.09 114.33 MW-PB-28 08/27/2016 134.42 20.05 114.37 MW-PB-28 10/10/2016 134.42 20.22 114.20 MW-PB-28 01/18/2017 134.42 20.08 114.34 MW-PB-28 08/14/2017 134.42 20.17 114.25 MW-PB-28 05/09/2017 134.42 20.19 114.23 MW-PB-28 04/11/2017 134.42 20.27 114.15 MW-PB-28 02/17/2017 134.42 20.47 113.95 GHD 11137316 (1)

TABLE 4.2 Page 9of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-29 02/01/2016 115.05 5.72 109.33 MW-PB-29 04/25/2016 115.05 5.63 109.42 MW-PB-29 07/25/2016 115.05 5.37 109.68 MW-PB-29 10/10/2016 115.05 5.59 109.46 MW-PB-29 11/30/2016 115.05 5.52 109.53 MW-PB-29 01/18/2017 115.05 5.99 109.06 MW-PB-29 10/06/2017 115.05 5.70 109.35 MW-PB-29 09/12/2017 115.05 5.17 109.88 MW-PB-29 08/14/2017 115.05 4.96 110.09 MW-PB-29 05/09/2017 115.05 5.18 109.87 MW-PB-29 04/11/2017 115.05 4.75 110.30 MW-PB-29 02/02/2017 115.05 5.98 109.07 MW-PB-3 02/01/2016 132.37 5.11 127.26 MW-PB-3 04/25/2016 132.37 5.06 127.31 MW-PB-3 07/25/2016 132.37 6.46 125.91 MW-PB-3 10/10/2016 132.37 7.30 125.07 MW-PB-3 01/18/2017 132.37 7.92 124.45 MW-PB-3 08/14/2017 132.37 4.27 128.10 MW-PB-3 05/09/2017 132.37 5.62 126.75 MW-PB-3 04/11/2017 132.37 5.02 127.35 MW-PB-30 02/01/2016 114.69 4.34 110.35 MW-PB-30 04/25/2016 114.69 5.22 109.47 MW-PB-30 07/25/2016 114.69 4.92 109.77 MW-PB-30 10/10/2016 114.69 5.15 109.54 MW-PB-30 11/30/2016 114.69 5.05 109.64 MW-PB-30 01/18/2017 114.69 5.89 108.80 MW-PB-30 10/06/2017 114.69 5.27 109.42 MW-PB-30 09/12/2017 114.69 4.77 109.92 MW-PB-30 08/14/2017 114.69 4.6 110.1 MW-PB-30 05/09/2017 114.69 4.75 109.94 MW-PB-30 04/11/2017 114.69 4.43 110.26 MW-PB-30 02/02/2017 114.69 5.89 108.80 MW-PB-31 02/01/2016 114.73 5.07 109.66 MW-PB-31 04/25/2016 114.73 4.94 109.79 MW-PB-31 07/25/2016 114.73 4.67 110.06 MW-PB-31 10/10/2016 114.73 4.84 109.89 MW-PB-31 11/30/2016 114.73 4.65 110.08 MW-PB-31 01/18/2017 114.73 5.38 109.35 MW-PB-31 10/06/2017 114.73 4.98 109.75 GHD 11137316 (1)

TABLE 4.2 Page 10of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-31 09/12/2017 114.73 4.52 110.21 MW-PB-31 08/14/2017 114.73 5.11 109.62 MW-PB-31 05/09/2017 114.73 4.47 110.26 MW-PB-31 04/12/2017 114.73 4.21 110.52 MW-PB-4 02/01/2016 115.02 7.75 107.27 MW-PB-4 04/25/2016 115.02 7.72 107.30 MW-PB-4 07/25/2016 115.02 7.81 107.21 MW-PB-4 10/10/2016 115.02 8.03 106.99 MW-PB-4 01/18/2017 115.02 7.86 107.16 MW-PB-4 08/14/2017 115.02 6.77 108.25 MW-PB-4 05/09/2017 115.02 6.62 108.40 MW-PB-5 02/01/2016 117.58 4.65 112.93 MW-PB-5 04/25/2016 117.58 4.50 113.08 MW-PB-5 07/25/2016 117.58 5.10 112.48 MW-PB-5 10/10/2016 117.58 5.72 111.86 MW-PB-5 01/18/2017 117.58 5.55 112.03 MW-PB-5 08/14/2017 117.58 5.02 112.56 MW-PB-5 05/10/2017 117.58 4.89 112.69 MW-PB-6 02/01/2016 114.06 6.89 107.17 MW-PB-6 04/25/2016 114.06 10.00 104.06 MW-PB-6 07/25/2016 114.06 7.48 106.58 MW-PB-6 10/10/2016 114.06 7.10 106.96 MW-PB-6 01/18/2017 114.06 6.80 107.26 MW-PB-6 08/14/2017 114.06 5.9 108.2 MW-PB-6 05/10/2017 114.06 6.00 108.06 MW-PB-7 02/01/2016 115.15 6.63 108.52 MW-PB-7 04/25/2016 115.15 6.99 108.16 MW-PB-7 07/25/2016 115.15 6.42 108.73 MW-PB-7 10/10/2016 115.15 5.36 109.79 MW-PB-7 01/18/2017 115.15 7.24 107.91 MW-PB-7 08/14/2017 115.15 7.42 107.73 MW-PB-7 05/10/2017 115.15 5.19 109.96 GHD 11137316 (1)

TABLE 4.2 Page 11of11

SUMMARY

OF GROUNDWATER ELEVATIONS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Reference Top of Depth to Water Groundwater Well Measurement Casing Elevation (feet Below Top Elevation Identification Date (feet C.D.) of Casing) (feet C.D.)

MW-PB-8 02/01/2016 114.26 6.04 108.22 MW-PB-8 04/25/2016 114.26 5.55 108.71 MW-PB-8 07/25/2016 114.26 5.80 108.46 MW-PB-8 10/10/2016 114.26 5.01 109.25 MW-PB-8 01/18/2017 114.26 5.98 108.28 MW-PB-8 08/14/2017 114.26 4.4 109.9 MW-PB-8 05/10/2017 114.26 4.32 109.94 Notes:

1) C.D. - Conowingo Datum.

GHD 11137316 (1)

TABLE 5.1 Page 1of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Report Result Sample Location Sample Date Detected (pCi/L)

MW-PB-1 04/26/2016 193 No MW-PB-1 04/26/2016 181 No MW-PB-1 05/10/2017 187 No MW-PB-1 05/10/2017 183 No MW-PB-10 02/03/2016 193 No MW-PB-10 04/25/2016 192 No MW-PB-10 07/25/2016 165 No MW-PB-10 10/12/2016 180 No MW-PB-10 01/19/2017 193 No MW-PB-10 05/10/2017 196 No MW-PB-10 08/16/2017 172 No MW-PB-11 02/02/2016 196 No MW-PB-11 04/25/2016 192 No MW-PB-11 07/27/2016 171 No MW-PB-11 10/11/2016 182 No MW-PB-11 01/18/2017 193 No MW-PB-12 02/02/2016 194 No MW-PB-12 04/27/2016 191 No MW-PB-12 07/27/2016 250 Yes MW-PB-12 07/27/2016 220 Yes MW-PB-12 07/27/2016 181 Yes MW-PB-12 11/30/2016 245 Yes MW-PB-12 01/19/2017 193 No MW-PB-12 05/09/2017 193 No MW-PB-12 08/14/2017 172 No MW-PB-13 02/02/2016 248 Yes MW-PB-13 04/25/2016 192 No MW-PB-13 07/26/2016 169 No MW-PB-13 10/11/2016 185 No MW-PB-13 01/18/2017 214 Yes MW-PB-13 02/17/2017 230 Yes MW-PB-13 05/09/2017 197 No MW-PB-13 08/14/2017 205 Yes MW-PB-14 04/26/2016 195 No MW-PB-14 05/10/2017 196 No MW-PB-15 02/03/2016 181 No GHD 11137316 (1)

TABLE 5.1 Page 2of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTTOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-15 04/25/2016 193 No MW-PB-15 07/25/2016 167 No MW-PB-15 10/12/2016 184 No MW-PB-15 01/19/2017 192 No MW-PB-15 05/10/2017 198 No MW-PB-15 08/16/2017 174 No MW-PB-16 02/03/2016 178 No MW-PB-16 04/25/2016 194 No MW-PB-16 07/25/2016 180 Yes MW-PB-16 07/25/2016 173 No MW-PB-16 10/12/2016 183 No MW-PB-16 01/19/2017 189 No MW-PB-16 05/10/2017 183 No MW-PB-16 08/16/2017 172 No MW-PB-19 02/02/2016 196 No MW-PB-19 04/25/2016 189 No MW-PB-19 07/26/2016 167 No MW-PB-19 08/27/2016 178 No MW-PB-19 10/11/2016 179 No MW-PB-19 10/11/2016 182 No MW-PB-19 01/18/2017 193 No MW-PB-19 02/17/2017 180 No MW-PB-19 05/09/2017 180 No MW-PB-19 08/14/2017 171 No MW-PB-2 02/02/2016 194 No MW-PB-2 04/25/2016 194 No MW-PB-2 07/26/2016 171 No MW-PB-2 10/11/2016 181 No MW-PB-2 01/18/2017 188 No MW-PB-2 02/17/2017 181 No MW-PB-2 05/09/2017 197 No MW-PB-2 08/14/2017 176 No MW-PB-20 02/02/2016 195 No MW-PB-20 04/25/2016 194 No MW-PB-20 07/27/2016 162 No MW-PB-20 10/11/2016 182 No MW-PB-20 01/18/2017 192 No MW-PB-20 05/09/2017 192 No MW-PB-20 08/14/2017 170 No GHD 11137316 (1)

TABLE 5.1 Page 3of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTTOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-21 02/02/2016 198 No MW-PB-21 04/26/2016 192 No MW-PB-21 07/27/2016 161 No MW-PB-21 10/11/2016 181 No MW-PB-21 01/19/2017 189 No MW-PB-21 05/09/2017 180 No MW-PB-21 09/11/2017 177 No MW-PB-22 02/02/2016 507 Yes MW-PB-22 04/26/2016 581 Yes MW-PB-22 07/27/2016 745 Yes MW-PB-22 07/27/2016 702 Yes MW-PB-22 10/11/2016 429 Yes MW-PB-22 01/19/2017 322 Yes MW-PB-22 05/09/2017 220 Yes MW-PB-22 08/14/2017 379 Yes MW-PB-24 02/02/2016 200 No MW-PB-24 03/03/2016 232 Yes MW-PB-24 03/29/2016 229 Yes MW-PB-24 04/05/2016 186 Yes MW-PB-24 04/12/2016 255 Yes MW-PB-24 04/19/2016 192 No MW-PB-24 04/26/2016 305 Yes MW-PB-24 05/02/2016 250 Yes MW-PB-24 05/11/2016 1010 Yes MW-PB-24 05/11/2016 833 Yes MW-PB-24 05/11/2016 800 Yes MW-PB-24 05/17/2016 567 Yes MW-PB-24 05/25/2016 592 Yes MW-PB-24 06/01/2016 1060 Yes MW-PB-24 06/08/2016 1320 Yes MW-PB-24 06/15/2016 1010 Yes MW-PB-24 06/22/2016 275 Yes MW-PB-24 06/29/2016 285 Yes MW-PB-24 07/06/2016 1180 Yes MW-PB-24 07/06/2016 1260 Yes MW-PB-24 07/12/2016 1000 Yes MW-PB-24 07/19/2016 344 Yes MW-PB-24 07/27/2016 893 Yes MW-PB-24 08/04/2016 1910 Yes MW-PB-24 08/04/2016 1690 Yes MW-PB-24 08/09/2016 1680 Yes MW-PB-24 08/16/2016 1700 Yes GHD 11137316 (1)

TABLE 5.1 Page 4of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-24 08/23/2016 3180 Yes MW-PB-24 08/23/2016 3040 Yes MW-PB-24 08/23/2016 3270 Yes MW-PB-24 08/27/2016 2190 Yes MW-PB-24 09/07/2016 1230 Yes MW-PB-24 09/13/2016 1180 Yes MW-PB-24 09/20/2016 260 Yes MW-PB-24 09/20/2016 307 Yes MW-PB-24 09/20/2016 283 Yes MW-PB-24 09/27/2016 539 Yes MW-PB-24 10/10/2016 362 Yes MW-PB-24 11/14/2016 382 Yes MW-PB-24 11/30/2016 246 Yes MW-PB-24 01/18/2017 260 Yes MW-PB-24 02/17/2017 257 Yes MW-PB-24 02/21/2017 355 Yes MW-PB-24 02/27/2017 298 Yes MW-PB-24 03/06/2017 650 Yes MW-PB-24 03/06/2017 815 Yes MW-PB-24 03/06/2017 757 Yes MW-PB-24 03/13/2017 735 Yes MW-PB-24 03/27/2017 504 Yes MW-PB-24 04/03/2017 2250 Yes MW-PB-24 04/12/2017 1680 Yes MW-PB-24 04/17/2017 1660 Yes MW-PB-24 05/09/2017 1840 Yes MW-PB-24 06/15/2017 1540 Yes MW-PB-24 07/11/2017 1490 Yes MW-PB-24 08/15/2017 1490 Yes MW-PB-24 09/11/2017 1850 Yes MW-PB-24 12/12/2017 284 Yes MW-PB-24 12/21/2017 510 Yes MW-PB-25 02/02/2016 8890 Yes MW-PB-25 03/03/2016 9130 Yes MW-PB-25 03/29/2016 9410 Yes MW-PB-25 04/05/2016 11000 Yes MW-PB-25 04/12/2016 10000 Yes MW-PB-25 04/19/2016 8970 Yes MW-PB-25 04/26/2016 7560 Yes MW-PB-25 05/02/2016 10900 Yes MW-PB-25 05/11/2016 10000 Yes MW-PB-25 05/17/2016 8030 Yes MW-PB-25 05/25/2016 10400 Yes GHD 11137316 (1)

TABLE 5.1 Page 5of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-25 06/01/2016 7940 Yes MW-PB-25 06/08/2016 7050 Yes MW-PB-25 06/15/2016 6760 Yes MW-PB-25 06/22/2016 7060 Yes MW-PB-25 06/29/2016 8300 Yes MW-PB-25 07/06/2016 7330 Yes MW-PB-25 07/12/2016 8360 Yes MW-PB-25 07/19/2016 5330 Yes MW-PB-25 07/27/2016 7690 Yes MW-PB-25 08/04/2016 3740 Yes MW-PB-25 08/04/2016 3970 Yes MW-PB-25 08/09/2016 7130 Yes MW-PB-25 08/16/2016 7590 Yes MW-PB-25 08/23/2016 7480 Yes MW-PB-25 08/23/2016 8090 Yes MW-PB-25 08/23/2016 7310 Yes MW-PB-25 08/27/2016 7610 Yes MW-PB-25 09/07/2016 4420 Yes MW-PB-25 09/13/2016 3870 Yes MW-PB-25 09/20/2016 8880 Yes MW-PB-25 09/20/2016 7700 Yes MW-PB-25 09/27/2016 4240 Yes MW-PB-25 10/10/2016 5930 Yes MW-PB-25 11/14/2016 9010 Yes MW-PB-25 11/30/2016 5150 Yes MW-PB-25 01/18/2017 8540 Yes MW-PB-25 01/18/2017 6610 Yes MW-PB-25 02/02/2017 5400 Yes MW-PB-25 02/17/2017 16300 Yes MW-PB-25 02/21/2017 10800 Yes MW-PB-25 02/27/2017 17600 Yes MW-PB-25 03/06/2017 10900 Yes MW-PB-25 03/13/2017 13500 Yes MW-PB-25 03/20/2017 4800 Yes MW-PB-25 03/27/2017 6070 Yes MW-PB-25 04/03/2017 4420 Yes MW-PB-25 04/12/2017 6400 Yes MW-PB-25 04/17/2017 6210 Yes MW-PB-25 05/09/2017 5810 Yes MW-PB-25 06/15/2017 5130 Yes MW-PB-25 07/11/2017 4950 Yes MW-PB-25 08/15/2017 6610 Yes MW-PB-25 08/15/2017 5240 Yes MW-PB-25 09/11/2017 4860 Yes GHD 11137316 (1)

TABLE 5.1 Page 6of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-25 12/12/2017 13900 Yes MW-PB-25 12/12/2017 13800 Yes MW-PB-25 12/12/2017 12700 Yes MW-PB-25 12/21/2017 12800 Yes MW-PB-26 02/02/2016 247 Yes MW-PB-26 03/03/2016 299 Yes MW-PB-26 03/29/2016 266 Yes MW-PB-26 04/05/2016 262 Yes MW-PB-26 04/12/2016 211 Yes MW-PB-26 04/19/2016 295 Yes MW-PB-26 04/26/2016 367 Yes MW-PB-26 04/26/2016 401 Yes MW-PB-26 05/02/2016 214 Yes MW-PB-26 05/11/2016 296 Yes MW-PB-26 05/17/2016 261 Yes MW-PB-26 05/25/2016 194 No MW-PB-26 06/01/2016 179 No MW-PB-26 06/08/2016 176 No MW-PB-26 06/15/2016 205 Yes MW-PB-26 06/22/2016 175 No MW-PB-26 06/29/2016 190 No MW-PB-26 07/06/2016 221 Yes MW-PB-26 07/06/2016 369 Yes MW-PB-26 07/12/2016 253 Yes MW-PB-26 07/19/2016 177 No MW-PB-26 07/27/2016 176 No MW-PB-26 08/04/2016 172 No MW-PB-26 08/09/2016 167 No MW-PB-26 08/16/2016 179 No MW-PB-26 08/23/2016 187 Yes MW-PB-26 09/07/2016 273 Yes MW-PB-26 09/13/2016 189 Yes MW-PB-26 09/20/2016 191 Yes MW-PB-26 09/27/2016 167 No MW-PB-26 10/10/2016 208 Yes MW-PB-26 11/14/2016 227 Yes MW-PB-26 11/30/2016 345 Yes MW-PB-26 01/18/2017 239 Yes MW-PB-26 02/21/2017 193 No MW-PB-26 02/27/2017 245 Yes MW-PB-26 03/06/2017 252 Yes MW-PB-26 03/13/2017 256 Yes MW-PB-26 03/20/2017 418 Yes GHD 11137316 (1)

TABLE 5.1 Page 7of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-26 03/27/2017 272 Yes MW-PB-26 04/03/2017 217 Yes MW-PB-26 04/12/2017 319 Yes MW-PB-26 04/17/2017 333 Yes MW-PB-26 05/09/2017 193 No MW-PB-26 06/15/2017 195 No MW-PB-26 07/11/2017 201 Yes MW-PB-26 08/15/2017 267 Yes MW-PB-26 09/11/2017 176 No MW-PB-26 12/12/2017 189 Yes MW-PB-26 12/21/2017 237 Yes MW-PB-27 02/02/2016 836 Yes MW-PB-27 02/02/2016 792 Yes MW-PB-27 03/03/2016 1280 Yes MW-PB-27 03/29/2016 1100 Yes MW-PB-27 04/05/2016 959 Yes MW-PB-27 04/12/2016 1050 Yes MW-PB-27 04/19/2016 1460 Yes MW-PB-27 04/26/2016 1830 Yes MW-PB-27 05/02/2016 1250 Yes MW-PB-27 05/11/2016 1230 Yes MW-PB-27 05/17/2016 1380 Yes MW-PB-27 05/25/2016 1260 Yes MW-PB-27 06/01/2016 1350 Yes MW-PB-27 06/08/2016 1520 Yes MW-PB-27 06/15/2016 1250 Yes MW-PB-27 06/22/2016 1380 Yes MW-PB-27 06/29/2016 1180 Yes MW-PB-27 07/06/2016 1210 Yes MW-PB-27 07/12/2016 1060 Yes MW-PB-27 07/19/2016 1080 Yes MW-PB-27 07/27/2016 980 Yes MW-PB-27 08/04/2016 903 Yes MW-PB-27 08/09/2016 935 Yes MW-PB-27 08/16/2016 1060 Yes MW-PB-27 08/23/2016 922 Yes MW-PB-27 09/07/2016 829 Yes MW-PB-27 09/13/2016 743 Yes MW-PB-27 09/20/2016 1120 Yes MW-PB-27 09/27/2016 621 Yes MW-PB-27 10/10/2016 1270 Yes MW-PB-27 11/14/2016 712 Yes MW-PB-27 11/30/2016 892 Yes GHD 11137316 (1)

TABLE 5.1 Page 8of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTTOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-27 01/18/2017 816 Yes MW-PB-27 02/21/2017 476 Yes MW-PB-27 02/27/2017 533 Yes MW-PB-27 03/06/2017 482 Yes MW-PB-27 03/13/2017 563 Yes MW-PB-27 03/20/2017 730 Yes MW-PB-27 03/27/2017 890 Yes MW-PB-27 04/03/2017 942 Yes MW-PB-27 04/12/2017 596 Yes MW-PB-27 04/17/2017 773 Yes MW-PB-27 05/09/2017 560 Yes MW-PB-27 05/09/2017 676 Yes MW-PB-27 06/15/2017 608 Yes MW-PB-27 07/11/2017 758 Yes MW-PB-27 08/15/2017 621 Yes MW-PB-27 09/11/2017 610 Yes MW-PB-27 12/12/2017 504 Yes MW-PB-27 12/21/2017 467 Yes MW-PB-28 02/02/2016 192 No MW-PB-28 04/25/2016 176 No MW-PB-28 07/26/2016 168 No MW-PB-28 08/27/2016 179 No MW-PB-28 10/11/2016 184 No MW-PB-28 01/18/2017 193 No MW-PB-28 02/17/2017 179 No MW-PB-28 05/09/2017 185 No MW-PB-28 08/14/2017 169 No MW-PB-29 02/02/2016 203 Yes MW-PB-29 04/27/2016 373 Yes MW-PB-29 07/27/2016 337 Yes MW-PB-29 10/11/2016 294 Yes MW-PB-29 11/30/2016 445 Yes MW-PB-29 01/18/2017 476 Yes MW-PB-29 02/02/2017 287 Yes MW-PB-29 04/11/2017 341 Yes MW-PB-29 05/09/2017 285 Yes MW-PB-29 08/15/2017 310 Yes MW-PB-29 09/12/2017 189 No MW-PB-29 10/06/2017 594 Yes MW-PB-29 10/06/2017 446 Yes MW-PB-29 10/06/2017 427 Yes MW-PB-29 12/11/2017 318 Yes GHD 11137316 (1)

TABLE 5.1 Page 9of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-3 02/02/2016 195 No MW-PB-3 04/25/2016 191 No MW-PB-3 07/26/2016 171 No MW-PB-3 10/11/2016 181 No MW-PB-3 01/18/2017 195 No MW-PB-3 01/18/2017 180 No MW-PB-3 05/09/2017 193 No MW-PB-3 08/14/2017 177 No MW-PB-30 02/02/2016 191 No MW-PB-30 04/27/2016 696 Yes MW-PB-30 07/27/2016 220 Yes MW-PB-30 10/11/2016 196 Yes MW-PB-30 11/30/2016 264 Yes MW-PB-30 01/18/2017 1350 Yes MW-PB-30 01/18/2017 1440 Yes MW-PB-30 02/02/2017 1050 Yes MW-PB-30 04/11/2017 920 Yes MW-PB-30 05/09/2017 338 Yes MW-PB-30 08/15/2017 2720 Yes MW-PB-30 08/15/2017 2510 Yes MW-PB-30 09/12/2017 2390 Yes MW-PB-30 10/06/2017 1700 Yes MW-PB-30 12/11/2017 448 Yes MW-PB-31 02/02/2016 194 No MW-PB-31 02/02/2016 187 Yes MW-PB-31 04/27/2016 177 No MW-PB-31 07/26/2016 213 Yes MW-PB-31 10/11/2016 181 No MW-PB-31 11/30/2016 212 Yes MW-PB-31 01/19/2017 191 No MW-PB-31 05/09/2017 184 No MW-PB-31 08/14/2017 171 No MW-PB-31 09/12/2017 184 No MW-PB-31 10/06/2017 186 No MW-PB-31 12/11/2017 183 No MW-PB-4 02/02/2016 241 Yes MW-PB-4 02/02/2016 200 No MW-PB-4 04/26/2016 192 No MW-PB-4 07/27/2016 211 Yes MW-PB-4 10/11/2016 181 No GHD 11137316 (1)

TABLE 5.1 Page 10of10 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-4 10/11/2016 183 No MW-PB-4 01/19/2017 201 Yes MW-PB-4 05/09/2017 195 No MW-PB-4 08/14/2017 176 No MW-PB-4 08/14/2017 179 No MW-PB-5 04/25/2016 194 No MW-PB-5 05/10/2017 194 No MW-PB-6 04/25/2016 194 No MW-PB-6 05/10/2017 195 No MW-PB-7 02/03/2016 194 No MW-PB-7 04/25/2016 177 No MW-PB-7 04/25/2016 191 No MW-PB-7 07/25/2016 166 No MW-PB-7 10/12/2016 184 No MW-PB-7 01/19/2017 193 No MW-PB-7 05/10/2017 192 No MW-PB-7 05/10/2017 196 No MW-PB-7 08/15/2017 176 No MW-PB-8 02/03/2016 179 No MW-PB-8 04/26/2016 195 No MW-PB-8 07/25/2016 168 No MW-PB-8 10/12/2016 181 No MW-PB-8 01/19/2017 194 No MW-PB-8 05/10/2017 195 No MW-PB-8 08/15/2017 175 No Notes:

pCi/L - picocuries per liter GHD 11137316 (1)

TABLE 5.2 Page 1of39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Report Result Location ID Sample Date Parameter Name Detected (pCi/L)

MW-PB-1 04/26/2016 1-131 13.99 No MW-PB-1 04/26/2016 CS-137 6.067 No MW-PB-1 04/26/2016 C0-60 7.663 No MW-PB-1 04/26/2016 K-40 130.1 No MW-PB-1 04/26/2016 BE-7 57.19 No MW-PB-1 04/26/2016 MN-54 6.079 No MW-PB-1 04/26/2016 CS-134 6.687 No MW-PB-1 04/26/2016 ZR-95 8.084 No MW-PB-1 04/26/2016 NB-95 5.289 No MW-PB-1 04/26/2016 LA-140 10.26 No MW-PB-1 04/26/2016 C0-58 5.301 No MW-PB-1 04/26/2016 ZN-65 9.424 No MW-PB-1 04/26/2016 FE-59 12.24 No MW-PB-1 04/26/2016 BA-140 34.51 No MW-PB-1 04/26/2016 1-131 9.163 No MW-PB-1 04/26/2016 CS-137 3.955 No MW-PB-1 04/26/2016 C0-60 4 .008 No MW-PB-1 04/26/2016 K-40 29.81 No MW-PB-1 04/26/2016 BE-7 36.78 No MW-PB-1 04/26/2016 MN-54 4.073 No MW-PB-1 04/26/2016 CS-134 3.69 No MW-PB-1 04/26/2016 ZR-95 6.68 No MW-PB-1 04/26/2016 NB-95 3.933 No MW-PB-1 04/26/2016 LA-140 7.845 No MW-PB-1 04/26/2016 C0-58 4.136 No MW-PB-1 04/26/2016 ZN-65 7.235 No MW-PB-1 04/26/2016 FE-59 8.194 No MW-PB-1 04/26/2016 BA-140 22.65 No MW-PB-1 05/10/2017 1-131 13.2 No MW-PB-1 05/10/2017 CS-137 4.291 No MW-PB-1 05/10/2017 C0-60 3.655 No MW-PB-1 05/10/2017 K-40 32.84 No MW-PB-1 05/10/2017 BE-7 40.19 No MW-PB-1 05/10/2017 MN-54 3.482 No MW-PB-1 05/10/2017 CS-134 4.26 No MW-PB-1 05/10/2017 ZR-95 7.037 No MW-PB-1 05/10/2017 NB-95 4.72 No MW-PB-1 05/10/2017 LA-140 7.856 No MW-PB-1 05/10/2017 C0-58 3.599 No MW-PB-1 05/10/2017 ZN-65 8.292 No MW-PB-1 05/10/2017 FE-59 9.444 No MW-PB-1 05/10/2017 BA-140 26.98 No GHD 11137316 (1)

TABLE 5.2 Page 2 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-1 05/10/2017 1-131 10.42 No MW-PB-1 05/10/2017 CS-137 3.168 No MW-PB-1 05/10/2017 C0-60 3.336 No MW-PB-1 05/10/2017 K-40 65.35 No MW-PB-1 05/10/2017 BE-7 31.71 No MW-PB-1 05/10/2017 MN-54 3.14 No MW-PB-1 05/10/2017 CS-134 3.696 No MW-PB-1 05/10/2017 ZR-95 5.765 No MW-PB-1 05/10/2017 NB-95 3.362 No MW-PB-1 05/10/2017 LA-140 7.67 No MW-PB-1 05/10/2017 C0-58 3.851 No MW-PB-1 05/10/2017 ZN-65 6.751 No MW-PB-1 05/10/2017 FE-59 8.164 No MW-PB-1 05/10/2017 BA-140 19.82 No MW-PB-10 02/03/2016 1-131 14.51 No MW-PB-10 02/03/2016 CS-137 5.561 No MW-PB-10 02/03/2016 C0-60 5.853 No MW-PB-10 02/03/2016 K-40 65.26 No MW-PB-10 02/03/2016 BE-7 59.92 No MW-PB-10 02/03/2016 MN-54 5.283 No MW-PB-10 02/03/2016 CS-134 5.863 No MW-PB-10 02/03/2016 ZR-95 11.18 No MW-PB-10 02/03/2016 NB-95 7.211 No MW-PB-10 02/03/2016 LA-140 10.89 No MW-PB-10 02/03/2016 C0-58 5.974 No MW-PB-10 02/03/2016 ZN-65 12.82 No MW-PB-10 02/03/2016 FE-59 12 No MW-PB-10 02/03/2016 BA-140 38.12 No MW-PB-10 04/25/2016 1-131 14.81 No MW-PB-10 04/25/2016 CS-137 4.984 No MW-PB-10 04/25/2016 SR-90 0.495 No MW-PB-10 04/25/2016 C0-60 6.007 No MW-PB-10 04/25/2016 GR-A (SUS) 6 .39 Yes MW-PB-10 04/25/2016 GR-B (SUS) 7.77 Yes MW-PB-10 04/25/2016 K-40 126.6 No MW-PB-10 04/25/2016 BE-7 74.82 No MW-PB-10 04/25/2016 U-233/234 0.02188 No MW-PB-10 04/25/2016 MN-54 5.039 No MW-PB-10 04/25/2016 CS-134 7.017 No MW-PB-10 04/25/2016 ZR-95 10.08 No MW-PB-10 04/25/2016 NB-95 7.347 No MW-PB-10 04/25/2016 PU-238 (AS) 0.05621 No MW-PB-10 04/25/2016 LA-140 14.67 No MW-PB-10 04/25/2016 C0-58 5.809 No GHD 11137316 {l)

TABLE 5.2 Page 3 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-10 04/25/2016 ZN-65 6.811 No MW-PB-10 04/25/2016 SR-89 4.35 No MW-PB-10 04/25/2016 AM-241 (AS) 0.04526 No MW-PB-10 04/25/2016 FE-59 11 .06 No MW-PB-10 04/25/2016 BA-140 41.82 No MW-PB-10 04/25/2016 U-235 (AS) 0.02704 No MW-PB-10 04/25/2016 CM-242 (AS) 0.0448 No MW-PB-10 04/25/2016 U-238 0.07057 No MW-PB-10 04/25/2016 GR-A (DIS) 6.6 No MW-PB-10 04/25/2016 GR-B (DIS) 9.93 Yes MW-PB-10 04/25/2016 CM-243/244 (AS) 0.0448 No MW-PB-10 04/25/2016 PU-239/240 (AS) 0.03017 No MW-PB-10 07/25/2016 1-131 14.72 No MW-PB-10 07/25/2016 CS-137 4.203 No MW-PB-10 07/25/2016 C0-60 4.232 No MW-PB-10 07/25/2016 K-40 95.08 No MW-PB-10 07/25/2016 BE-7 41 .99 No MW-PB-10 07/25/2016 MN-54 3.951 No MW-PB-10 07/25/2016 CS-134 4.018 No MW-PB-10 07/25/2016 ZR-95 7.861 No MW-PB-10 07/25/2016 NB-95 4.776 No MW-PB-10 07/25/2016 LA-140 10.69 No MW-PB-10 07/25/2016 C0-58 4 .11 No MW-PB-10 07/25/2016 ZN-65 8.255 No MW-PB-10 07/25/2016 FE-59 11 .03 No MW-PB-10 07/25/2016 BA-140 30.66 No MW-PB-10 10/12/2016 1-131 10.55 No MW-PB-10 10/12/2016 CS-137 6.266 No MW-PB-10 10/12/2016 C0-60 5.41 No MW-PB-10 10/12/2016 K-40 52.68 No MW-PB-10 10/12/2016 BE-7 52.46 No MW-PB-10 10/12/2016 MN-54 6.031 No MW-PB-10 10/12/2016 CS-134 7.917 No MW-PB-10 10/12/2016 ZR-95 10.79 No MW-PB-10 10/12/2016 NB-95 7.642 No MW-PB-10 10/12/2016 LA-140 7.217 No MW-PB-10 10/12/2016 C0-58 5.207 No MW-PB-10 10/12/2016 ZN-65 13.38 No MW-PB-10 10/12/2016 FE-59 9.503 No MW-PB-10 10/12/2016 BA-140 27.43 No MW-PB-10 01/19/2017 1-131 9.893 No MW-PB-10 01/19/2017 CS-137 3.706 No MW-PB-10 01/19/2017 C0-60 3.217 No MW-PB-10 01/19/2017 K-40 25.5 No GHD 11137316 (1)

TABLE 5.2 Page 4 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-10 01/19/2017 BE-7 35.35 No MW-PB-10 01/19/2017 MN-54 3.396 No MW-PB-10 01/19/2017 CS-134 3.582 No MW-PB-10 01/19/2017 ZR-95 6 .762 No MW-PB-10 01/19/2017 NB-95 4 .342 No MW-PB-10 01/19/2017 LA-140 6.956 No MW-PB-10 01/19/2017 C0-58 3.505 No MW-PB-10 01/19/2017 ZN-65 6.748 No MW-PB-10 01/19/2017 FE-59 7.808 No MW-PB-10 01/19/2017 BA-140 22.94 No MW-PB-10 05/10/2017 1-131 14.84 No MW-PB-10 05/10/2017 CS-137 4.427 No MW-PB-10 05/10/2017 SR-90 0.759 No MW-PB-10 05/10/2017 C0-60 3.725 No MW-PB-10 05/10/2017 GR-A (SUS) 1.95 No MW-PB-10 05/10/2017 GR-B (SUS) 3.65 No MW-PB-10 05/10/2017 K-40 62.4 No MW-PB-10 05/10/2017 BE-7 41.45 No MW-PB-10 05/10/2017 MN-54 4.143 No MW-PB-10 05/10/2017 CS-134 4.332 No MW-PB-10 05/10/2017 ZR-95 7.984 No MW-PB-10 05/10/2017 NB-95 4.708 No MW-PB-10 05/10/2017 LA-140 8.036 No MW-PB-10 05/10/2017 C0-58 4.121 No MW-PB-10 05/10/2017 ZN-65 9.566 No MW-PB-10 05/10/2017 SR-89 5.35 No MW-PB-10 05/10/2017 FE-59 7.881 No MW-PB-10 05/10/2017 BA-140 30.89 No MW-PB-10 05/10/2017 GR-A (DIS) 4.16 No MW-PB-10 05/10/2017 GR-B (DIS) 8.74 Yes MW-PB-10 08/16/2017 1-131 12.5 No MW-PB-10 08/16/2017 CS-137 2.357 No MW-PB-10 08/16/2017 C0-60 2.197 No MW-PB-10 08/16/2017 K-40 20.46 No MW-PB-10 08/16/2017 BE-7 21.89 No MW-PB-10 08/16/2017 MN-54 2.292 No MW-PB-10 08/16/2017 CS-134 2.36 No MW-PB-10 08/16/2017 ZR-95 4.61 No MW-PB-10 08/16/2017 NB-95 2.682 No MW-PB-10 08/16/2017 LA-140 7.964 No MW-PB-10 08/16/2017 C0-58 2.395 No MW-PB-10 08/16/2017 ZN-65 5.189 No MW-PB-10 08/16/2017 FE-59 6.292 No MW-PB-10 08/16/2017 BA-140 22.61 No GHD 11137316 (1)

TABLE 5.2 Page 5 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-11 04/25/2016 1-131 12.82 No MW-PB-11 04/25/2016 CS-137 6.543 No MW-PB-11 04/25/2016 SR-90 0.419 No MW-PB-11 04/25/2016 C0-60 6.684 No MW-PB-11 04/25/2016 GR-A (SUS) 13.9 Yes MW-PB-11 04/25/2016 K-40 57.87 No MW-PB-11 04/25/2016 BE-7 53.33 No MW-PB-11 04/25/2016 U-233/234 0.07903 No MW-PB-11 04/25/2016 MN-54 5.411 No MW-PB-11 04/25/2016 CS-134 6.136 No MW-PB-11 04/25/2016 ZR-95 10.93 No MW-PB-11 04/25/2016 NB-95 5.994 No MW-PB-11 04/25/2016 PU-238 (AS) 0.1148 No MW-PB-11 04/25/2016 LA-140 9.267 No MW-PB-11 04/25/2016 C0-58 5.327 No MW-PB-11 04/25/2016 ZN-65 10.93 No MW-PB-11 04/25/2016 SR-89 6.56 No MW-PB-11 04/25/2016 AM-241 (AS) 0.09312 No MW-PB-11 04/25/2016 FE-59 9.132 No MW-PB-11 04/25/2016 BA-140 32.43 No MW-PB-11 04/25/2016 U-235 (AS) 0.05641 No MW-PB-11 04/25/2016 CM-242 (AS) 0.1717 No MW-PB-11 04/25/2016 U-238 0.09125 No MW-PB-11 04/25/2016 CM-243/244 (AS) 0.09219 No MW-PB-11 04/25/2016 PU-239/240 (AS) 0.1452 No MW-PB-11 04/25/2016 GR-B (SUS) 12.1 Yes MW-PB-11 04/25/2016 GR-A (DIS) 4.38 No MW-PB-11 04/25/2016 GR-B (DIS) 6.67 Yes MW-PB-12 04/27/2016 1-131 13.14 No MW-PB-12 04/27/2016 CS-137 7.155 No MW-PB-12 04/27/2016 SR-90 0.484 No MW-PB-12 04/27/2016 C0-60 7.668 No MW-PB-12 04/27/2016 GR-A (SUS) 0.793 No MW-PB-12 04/27/2016 GR-B (SUS) 1.55 No MW-PB-12 04/27/2016 K-40 83.89 No MW-PB-12 04/27/2016 BE-7 64.72 No MW-PB-12 04/27/2016 U-233/234 0.05949 No MW-PB-12 04/27/2016 MN-54 7.959 No MW-PB-12 04/27/2016 CS-134 7.712 No MW-PB-12 04/27/2016 ZR-95 11 .25 No MW-PB-12 04/27/2016 NB-95 8.831 No MW-PB-12 04/27/2016 PU-238 (AS) 0.08248 No MW-PB-12 04/27/2016 LA-140 8.327 No MW-PB-12 04/27/2016 Nl-63 4.06 No GHD 11137316 (1)

TABLE 5.2 Page 6 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-12 04/27/2016 C0-58 7.603 No MW-PB-12 04/27/2016 ZN-65 12 No MW-PB-12 04/27/2016 SR-89 5.19 No MW-PB-12 04/27/2016 AM-241 (AS) 0.2947 No MW-PB-12 04/27/2016 FE-59 15.44 No MW-PB-12 04/27/2016 FE-55 154.2 No MW-PB-12 04/27/2016 BA-140 32.31 No MW-PB-12 04/27/2016 U-235 (AS) 0.147 No MW-PB-12 04/27/2016 CM-242 (AS) 0.2918 No MW-PB-12 04/27/2016 U-238 0.1784 No MW-PB-12 04/27/2016 GR-A (DIS) 0.96 No MW-PB-12 04/27/2016 GR-B (DIS) 1.17 Yes MW-PB-12 04/27/2016 CM-243/244 (AS) 0.2918 No MW-PB-12 04/27/2016 PU-239/240 (AS) 0.1844 No MW-PB-12 05/09/2017 1-131 14.72 No MW-PB-12 05/09/2017 CS-137 4.704 No MW-PB-12 05/09/2017 C0-60 4.632 No MW-PB-12 05/09/2017 K-40 75.75 No MW-PB-12 05/09/2017 BE-7 46.49 No MW-PB-12 05/09/2017 MN-54 2.949 No MW-PB-12 05/09/2017 CS-134 5.21 No MW-PB-12 05/09/2017 ZR-95 8.424 No MW-PB-12 05/09/2017 NB-95 5.308 No MW-PB-12 05/09/2017 LA-140 11.62 No MW-PB-12 05/09/2017 C0-58 5.198 No MW-PB-12 05/09/2017 ZN-65 9.981 No MW-PB-12 05/09/2017 FE-59 9.704 No MW-PB-12 05/09/2017 BA-140 30.54 No MW-PB-13 04/25/2016 1-131 14.4 No MW-PB-13 04/25/2016 CS-137 6.917 No MW-PB-13 04/25/2016 SR-90 0.662 No MW-PB-13 04/25/2016 C0-60 6.229 No MW-PB-13 04/25/2016 GR-A (SUS) 3.99 No MW-PB-13 04/25/2016 K-40 115.8 No MW-PB-13 04/25/2016 BE-7 51.93 No MW-PB-13 04/25/2016 U-233/234 15.07 Yes MW-PB-13 04/25/2016 MN-54 5.7 No MW-PB-13 04/25/2016 CS-134 5.512 No MW-PB-13 04/25/2016 ZR-95 12.01 No MW-PB-13 04/25/2016 NB-95 7.393 No MW-PB-13 04/25/2016 PU-238 (AS) 0.09473 No MW-PB-13 04/25/2016 LA-140 12.99 No MW-PB-13 04/25/2016 C0-58 7.431 No MW-PB-13 04/25/2016 ZN-65 13.36 No GHD 11137316 (1)

TABLE 5.2 Page 7 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-13 04/25/2016 SR-89 5.12 No MW-PB-13 04/25/2016 AM-241 (AS) 0.2079 No MW-PB-13 04/25/2016 FE-59 13.41 No MW-PB-13 04/25/2016 BA-140 35.32 No MW-PB-13 04/25/2016 U-235 (AS) 0.445 Yes MW-PB-13 04/25/2016 CM-242 (AS) 0.05525 No MW-PB-13 04/25/2016 U-238 13.71 Yes MW-PB-13 04/25/2016 GR-B (DIS) 27.3 Yes MW-PB-13 04/25/2016 CM-243/244 (AS) 0.05525 No MW-PB-13 04/25/2016 PU-239/240 (AS) 0.134 No MW-PB-13 04/25/2016 GR-B (SUS) 3.6 No MW-PB-13 04/25/2016 GR-A (DIS) 14.6 Yes MW-PB-13 05/09/2017 1-131 14.69 No MW-PB-13 05/09/2017 CS-137 4.578 No MW-PB-13 05/09/2017 SR-90 0.684 No MW-PB-13 05/09/2017 C0-60 3.732 No MW-PB-13 05/09/2017 GR-A (SUS) 1.83 No MW-PB-13 05/09/2017 GR-B (SUS) 3.25 No MW-PB-13 05/09/2017 K-40 35.07 No MW-PB-13 05/09/2017 BE-7 35.84 No MW-PB-13 05/09/2017 MN-54 3.671 No MW-PB-13 05/09/2017 CS-134 5.105 No MW-PB-13 05/09/2017 ZR-95 7.729 No MW-PB-13 05/09/2017 NB-95 4.737 No MW-PB-13 05/09/2017 LA-140 12.14 No MW-PB-13 05/09/2017 C0-58 4.135 No MW-PB-13 05/09/2017 ZN-65 8.314 No MW-PB-13 05/09/2017 SR-89 3.98 No MW-PB-13 05/09/2017 FE-59 10.77 No MW-PB-13 05/09/2017 BA-140 27.58 No MW-PB-13 05/09/2017 GR-A (DIS) 15.6 Yes MW-PB-13 05/09/2017 GR-B (DIS) 18.8 Yes MW-PB-14 04/26/2016 1-131 13.58 No MW-PB-14 04/26/2016 CS-137 7.72 No MW-PB-14 04/26/2016 C0-60 7.347 No MW-PB-14 04/26/2016 K-40 62.91 No MW-PB-14 04/26/2016 BE-7 58.84 No MW-PB-14 04/26/2016 MN-54 6.888 No MW-PB-14 04/26/2016 CS-134 6.377 No MW-PB-14 04/26/2016 ZR-95 13.89 No MW-PB-14 04/26/2016 NB-95 7.224 No MW-PB-14 04/26/2016 LA-140 13.11 No MW-PB-14 04/26/2016 C0-58 5.437 No MW-PB-14 04/26/2016 ZN-65 11 .97 No GHD 11137316 (1)

TABLE 5.2 Page 8 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-14 04/26/2016 FE-59 15.34 No MW-PB-14 04/26/2016 BA-140 35.57 No MW-PB-14 05/10/2017 1-131 14.55 No MW-PB-14 05/10/2017 CS-137 4.383 No MW-PB-14 05/10/2017 C0-60 3.737 No MW-PB-14 05/10/2017 K-40 82.11 No MW-PB-14 05/10/2017 BE-7 35.96 No MW-PB-14 05/10/2017 MN-54 4.184 No MW-PB-14 05/10/2017 CS-134 4.675 No MW-PB-14 05/10/2017 ZR-95 7.54 No MW-PB-14 05/10/2017 NB-95 4.297 No MW-PB-14 05/10/2017 LA-140 8.58 No MW-PB-14 05/10/2017 C0-58 4.439 No MW-PB-14 05/10/2017 ZN-65 7.728 No MW-PB-14 05/10/2017 FE-59 8.566 No MW-PB-14 05/10/2017 BA-140 28.98 No MW-PB-15 02/03/2016 1-131 14.74 No MW-PB-15 02/03/2016 CS-137 5.976 No MW-PB-15 02/03/2016 C0-60 7.542 No MW-PB-15 02/03/2016 K-40 126.5 No MW-PB-15 02/03/2016 BE-7 61 .6 No MW-PB-15 02/03/2016 MN-54 5.923 No MW-PB-15 02/03/2016 CS-134 6.154 No MW-PB-15 02/03/2016 ZR-95 9.931 No MW-PB-15 02/03/2016 NB-95 7.979 No MW-PB-15 02/03/2016 LA-140 12.87 No MW-PB-15 02/03/2016 C0-58 5.964 No MW-PB-15 02/03/2016 ZN-65 11.6 No MW-PB-15 02/03/2016 FE-59 13.28 No MW-PB-15 02/03/2016 BA-140 38 No MW-PB-15 04/25/2016 1-131 12.82 No MW-PB-15 04/25/2016 CS-137 5.536 No MW-PB-15 04/25/2016 SR-90 0.495 No MW-PB-15 04/25/2016 C0-60 5.461 No MW-PB-15 04/25/2016 GR-A (SUS) 0.867 No MW-PB-15 04/25/2016 GR-B (SUS) 1.57 No MW-PB-15 04/25/2016 K-40 45.08 No MW-PB-15 04/25/2016 BE-7 48.91 No MW-PB-15 04/25/2016 U-233/234 0.1311 No MW-PB-15 04/25/2016 MN-54 5.096 No MW-PB-15 04/25/2016 CS-134 4.82 No MW-PB-15 04/25/2016 ZR-95 7.931 No MW-PB-15 04/25/2016 NB-95 6.459 No MW-PB-15 04/25/2016 PU-238 (AS) 0.1673 No GHD 11137316 (1)

TABLE 5.2 Page 9 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-15 04/25/2016 LA-140 9.761 No MW-PB-15 04/25/2016 C0-58 5.253 No MW-PB-15 04/25/2016 ZN-65 11 .77 No MW-PB-15 04/25/2016 SR-89 4 No MW-PB-15 04/25/2016 AM-241 (AS) 0.1989 No MW-PB-15 04/25/2016 FE-59 9.963 No MW-PB-15 04/25/2016 BA-140 31.59 No MW-PB-15 04/25/2016 U-235 (AS) 0.05127 No MW-PB-15 04/25/2016 CM-242 (AS) 0.08398 No MW-PB-15 04/25/2016 U-238 0.1173 No MW-PB-15 04/25/2016 GR-A (DIS) 1.52 No MW-PB-15 04/25/2016 GR-B (DIS) 8.79 Yes MW-PB-15 04/25/2016 CM-243/244 (AS) 0.1878 No MW-PB-15 04/25/2016 PU-239/240 (AS) 0.1414 No MW-PB-15 07/25/2016 1-131 10.79 No MW-PB-15 07/25/2016 CS-137 3.098 No MW-PB-15 07/25/2016 C0-60 3.309 No MW-PB-15 07/25/2016 K-40 34.5 No MW-PB-15 07/25/2016 BE-7 31.08 No MW-PB-15 07/25/2016 MN-54 3.226 No MW-PB-15 07/25/2016 CS-134 3.222 No MW-PB-15 07/25/2016 ZR-95 5.781 No MW-PB-15 07/25/2016 NB-95 3.812 No MW-PB-15 07/25/2016 LA-140 8.019 No MW-PB-15 07/25/2016 C0-58 3.59 No MW-PB-15 07/25/2016 ZN-65 5.949 No MW-PB-15 07/25/2016 FE-59 7.371 No MW-PB-15 07/25/2016 BA-140 23.89 No MW-PB-15 10/12/2016 1-131 14.68 No MW-PB-15 10/12/2016 CS-137 6.9 No MW-PB-15 10/12/2016 C0-60 9.248 No MW-PB-15 10/12/2016 K-40 159.2 No MW-PB-15 10/12/2016 BE-7 61 .66 No MW-PB-15 10/12/2016 MN-54 6.392 No MW-PB-15 10/12/2016 CS-134 7.435 No MW-PB-15 10/12/2016 ZR-95 14.96 No MW-PB-15 10/12/2016 NB-95 10.64 No MW-PB-15 10/12/2016 LA-140 12.66 No MW-PB-15 10/12/2016 C0-58 8.077 No MW-PB-15 10/12/2016 ZN-65 14.66 No MW-PB-15 10/12/2016 FE-59 13.49 No MW-PB-15 10/12/2016 BA-140 42.2 No MW-PB-15 01/19/2017 1-131 8.24 No MW-PB-15 01/19/2017 CS-137 3.31 No GHD 11137316 (1)

TABLE 5.2 Page 10 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-15 01/19/2017 C0-60 3.411 No MW-PB-15 01/19/2017 K-40 32.34 No MW-PB-15 01/19/2017 BE-7 28.97 No MW-PB-15 01/19/2017 MN-54 2.471 No MW-PB-15 01/19/2017 CS-134 2.418 No MW-PB-15 01/19/2017 ZR-95 5.862 No MW-PB-15 01/19/2017 NB-95 3.296 No MW-PB-15 01/19/2017 LA-140 5.807 No MW-PB-15 01/19/2017 C0-58 2.966 No MW-PB-15 01/19/2017 ZN-65 5.556 No MW-PB-15 01/19/2017 FE-59 6.703 No MW-PB-15 01/19/2017 BA-140 20.41 No MW-PB-15 05/10/2017 1-131 14.42 No MW-PB-15 05/10/2017 CS-137 4.374 No MW-PB-15 05/10/2017 SR-90 0.605 No MW-PB-15 05/10/2017 C0-60 3.776 No MW-PB-15 05/10/2017 GR-A (SUS) 0.799 No MW-PB-15 05/10/2017 GR-B (SUS) 1.43 No MW-PB-15 05/10/2017 K-40 90.98 No MW-PB-15 05/10/2017 BE-7 38.29 No MW-PB-15 05/10/2017 MN-54 3.416 No MW-PB-15 05/10/2017 CS-134 4.621 No MW-PB-15 05/10/2017 ZR-95 7.501 No MW-PB-15 05/10/2017 NB-95 4.223 No MW-PB-15 05/10/2017 LA-140 8.37 No MW-PB-15 05/10/2017 C0-58 4.815 No MW-PB-15 05/10/2017 ZN-65 6.844 No MW-PB-15 05/10/2017 SR-89 5.05 No MW-PB-15 05/10/2017 FE-59 10.23 No MW-PB-15 05/10/2017 BA-140 30.13 No MW-PB-15 05/10/2017 GR-A (DIS) 1.22 No MW-PB-15 05/10/2017 GR-B (DIS) 7.98 Yes MW-PB-15 08/16/2017 1-131 14.23 No MW-PB-15 08/16/2017 CS-137 2.314 No MW-PB-15 08/16/2017 C0-60 2.314 No MW-PB-15 08/16/2017 K-40 33.21 No MW-PB-15 08/16/2017 BE-7 22.68 No MW-PB-15 08/16/2017 MN-54 2.216 No MW-PB-15 08/16/2017 CS-134 2.335 No MW-PB-15 08/16/2017 ZR-95 4.658 No MW-PB-15 08/16/2017 NB-95 2.664 No MW-PB-15 08/16/2017 LA-140 6.951 No MW-PB-15 08/16/2017 C0-58 2.459 No MW-PB-15 08/16/2017 ZN-65 4.495 No GHD 11137316 (1)

TABLE 5.2 Page 11of39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-15 08/16/2017 FE-59 5.816 No MW-PB-15 08/16/2017 BA-140 23.82 No MW-PB-16 02/03/2016 1-131 13.86 No MW-PB-16 02/03/2016 CS-137 3.77 No MW-PB-16 02/03/2016 C0-60 3.281 No MW-PB-16 02/03/2016 K-40 67.49 No MW-PB-16 02/03/2016 BE-7 39.07 No MW-PB-16 02/03/2016 MN-54 3.83 No MW-PB-16 02/03/2016 CS-134 3.688 No MW-PB-16 02/03/2016 ZR-95 7.713 No MW-PB-16 02/03/2016 NB-95 3.843 No MW-PB-16 02/03/2016 LA-140 10.93 No MW-PB-16 02/03/2016 C0-58 3.433 No MW-PB-16 02/03/2016 ZN-65 6.36 No MW-PB-16 02/03/2016 FE-59 8.393 No MW-PB-16 02/03/2016 BA-140 27.77 No MW-PB-16 04/25/2016 1-131 12.15 No MW-PB-16 04/25/2016 CS-137 6.241 No MW-PB-16 04/25/2016 SR-90 0.6 No MW-PB-16 04/25/2016 C0-60 5.575 No MW-PB-16 04/25/2016 GR-A (SUS) 1.76 Yes MW-PB-16 04/25/2016 GR-B (SUS) 1.58 No MW-PB-16 04/25/2016 K-40 108.3 No MW-PB-16 04/25/2016 BE-7 49.99 No MW-PB-16 04/25/2016 U-233/234 0.1005 No MW-PB-16 04/25/2016 MN-54 5.9 No MW-PB-16 04/25/2016 CS-134 5.623 No MW-PB-16 04/25/2016 ZR-95 11 .02 No MW-PB-16 04/25/2016 NB-95 6.82 No MW-PB-16 04/25/2016 PU-238 (AS) 0.122 No MW-PB-16 04/25/2016 LA-140 10.94 No MW-PB-16 04/25/2016 C0-58 5.995 No MW-PB-16 04/25/2016 ZN-65 11 .26 No MW-PB-16 04/25/2016 SR-89 5.13 No MW-PB-16 04/25/2016 AM-241 (AS) 0.1023 No MW-PB-16 04/25/2016 FE-59 11 .91 No MW-PB-16 04/25/2016 BA-140 28.74 No MW-PB-16 04/25/2016 U-235 (AS) 0.02522 No MW-PB-16 04/25/2016 CM-242 (AS) 0.0314 No MW-PB-16 04/25/2016 U-238 0.137 No MW-PB-16 04/25/2016 GR-A (DIS) 3.46 Yes MW-PB-16 04/25/2016 GR-B (DIS) 8.31 Yes MW-PB-16 04/25/2016 CM-243/244 (AS) 0.1547 No MW-PB-16 04/25/2016 PU-239/240 (AS) 0.09963 No GHD 11137316 (1)

TABLE 5.2 Page 12 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-16 07/25/2016 1-131 12.41 No MW-PB-16 07/25/2016 CS-137 3.663 No MW-PB-16 07/25/2016 C0-60 3.087 No MW-PB-16 07/25/2016 K-40 30.95 No MW-PB-16 07/25/2016 BE-7 32.83 No MW-PB-16 07/25/2016 MN-54 3.295 No MW-PB-16 07/25/2016 CS-134 3.116 No MW-PB-16 07/25/2016 ZR-95 6.519 No MW-PB-16 07/25/2016 NB-95 3.832 No MW-PB-16 07/25/2016 LA-140 9.77 No MW-PB-16 07/25/2016 C0-58 3.616 No MW-PB-16 07/25/2016 ZN-65 6.94 No MW-PB-16 07/25/2016 FE-59 9.45 No MW-PB-16 07/25/2016 BA-140 26.66 No MW-PB-16 10/12/2016 1-131 10.42 No MW-PB-16 10/12/2016 CS-137 6.729 No MW-PB-16 10/12/2016 C0-60 7.298 No MW-PB-16 10/12/2016 K-40 84.08 No MW-PB-16 10/12/2016 BE-7 62.19 No MW-PB-16 10/12/2016 MN-54 6.368 No MW-PB-16 10/12/2016 CS-134 6.14 No MW-PB-16 10/12/2016 ZR-95 11.34 No MW-PB-16 10/12/2016 NB-95 8.878 No MW-PB-16 10/12/2016 LA-140 12.05 No MW-PB-16 10/12/2016 C0-58 6.35 No MW-PB-16 10/12/2016 ZN-65 15.55 No MW-PB-16 10/12/2016 FE-59 12.62 No MW-PB-16 10/12/2016 BA-140 33.49 No MW-PB-16 01/19/2017 1-131 8.244 No MW-PB-16 01/19/2017 CS-137 3.257 No MW-PB-16 01/19/2017 C0-60 3.335 No MW-PB-16 01/19/2017 K-40 28.76 No MW-PB-16 01/19/2017 BE-7 29.44 No MW-PB-16 01/19/2017 MN-54 2.82 No MW-PB-16 01/19/2017 CS-134 2.943 No MW-PB-16 01/19/2017 ZR-95 5.895 No MW-PB-16 01/19/2017 NB-95 3.274 No MW-PB-16 01/19/2017 LA-140 6.342 No MW-PB-16 01/19/2017 C0-58 3.221 No MW-PB-16 01/19/2017 ZN-65 6.179 No MW-PB-16 01/19/2017 FE-59 6.958 No MW-PB-16 01/19/2017 BA-140 19.06 No MW-PB-16 05/10/2017 1-131 14.48 No MW-PB-16 05/10/2017 CS-137 3.814 No GHD 11137316 (1)

TABLE 5.2 Page 13 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOITOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-16 05/10/2017 C0-60 3.357 No MW-PB-16 05/10/2017 GR-A (SUS) 3.47 Yes MW-PB-16 05/10/2017 GR-B (SUS) 1.5 No MW-PB-16 05/10/2017 K-40 43.19 No MW-PB-16 05/10/2017 BE-7 41.59 No MW-PB-16 05/10/2017 MN-54 3.462 No MW-PB-16 05/10/2017 CS-134 4.965 No MW-PB-16 05/10/2017 ZR-95 6.961 No MW-PB-16 05/10/2017 NB-95 4.988 No MW-PB-16 05/10/2017 LA-140 11.21 No MW-PB-16 05/10/2017 C0-58 4.473 No MW-PB-16 05/10/2017 ZN-65 9.059 No MW-PB-16 05/10/2017 SR-89 7.69 No MW-PB-16 05/10/2017 FE-59 9.817 No MW-PB-16 05/10/2017 BA-140 33.1 No MW-PB-16 05/10/2017 GR-A (DIS) 3.95 Yes MW-PB-16 05/10/2017 GR-B (DIS) 11.9 Yes MW-PB-16 05/10/2017 SR-90 0.889 No MW-PB-16 08/16/2017 1-131 14.91 No MW-PB-16 08/16/2017 CS-137 2.434 No MW-PB-16 08/16/2017 C0-60 2.165 No MW-PB-16 08/16/2017 K-40 36.74 No MW-PB-16 08/16/2017 BE-7 25.94 No MW-PB-16 08/16/2017 MN-54 2.329 No MW-PB-16 08/16/2017 CS-134 2.572 No MW-PB-16 08/16/2017 ZR-95 4.771 No MW-PB-16 08/16/2017 NB-95 2.831 No MW-PB-16 08/16/2017 LA-140 6.954 No MW-PB-16 08/16/2017 C0-58 2.723 No MW-PB-16 08/16/2017 ZN-65 5.047 No MW-PB-16 08/16/2017 FE-59 5.289 No MW-PB-16 08/16/2017 BA-140 24.94 No MW-PB-19 04/25/2016 1-131 13.01 No MW-PB-19 04/25/2016 CS-137 6.328 No MW-PB-19 04/25/2016 SR-90 0.375 No MW-PB-19 04/25/2016 C0-60 3.438 No MW-PB-19 04/25/2016 GR-A (SUS) 3.04 Yes MW-PB-19 04/25/2016 GR-B (SUS) 3.99 Yes MW-PB-19 04/25/2016 K-40 100.9 No MW-PB-19 04/25/2016 BE-7 47.88 No MW-PB-19 04/25/2016 U-233/234 0.2226 Yes MW-PB-19 04/25/2016 MN-54 4 .782 No MW-PB-19 04/25/2016 CS-134 5.108 No MW-PB-19 04/25/2016 ZR-95 9.07 No GHD 11137316 (1)

TABLE 5.2 Page 14 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-19 04/25/2016 NB-95 4.633 No MW-PB-19 04/25/2016 PU-238 (AS) 0.05171 No MW-PB-19 04/25/2016 LA-140 7.609 No MW-PB-19 04/25/2016 C0-58 5.135 No MW-PB-19 04/25/2016 ZN-65 11 .16 No MW-PB-19 04/25/2016 SR-89 3.25 No MW-PB-19 04/25/2016 AM-241 (AS) 0.2091 No MW-PB-19 04/25/2016 FE-59 11.47 No MW-PB-19 04/25/2016 BA-140 34.64 No MW-PB-19 04/25/2016 U-235 (AS) 0.08407 No MW-PB-19 04/25/2016 CM-242 (AS) 0.207 No MW-PB-19 04/25/2016 U-238 0.2115 Yes MW-PB-19 04/25/2016 GR-A (DIS) 0.957 No MW-PB-19 04/25/2016 GR-B (DIS) 2.86 Yes MW-PB-19 04/25/2016 CM-243/244 (AS) 0.207 No MW-PB-19 04/25/2016 PU-239/240 (AS) 0.1266 No MW-PB-19 05/09/2017 1-131 9.002 No MW-PB-19 05/09/2017 CS-137 2.528 No MW-PB-19 05/09/2017 C0-60 2.573 No MW-PB-19 05/09/2017 GR-A (SUS) 0.511 No MW-PB-19 05/09/2017 GR-B (SUS) 1.49 No MW-PB-19 05/09/2017 K-40 19.96 No MW-PB-19 05/09/2017 BE-7 22.36 No MW-PB-19 05/09/2017 MN-54 2.261 No MW-PB-19 05/09/2017 CS-134 2.645 No MW-PB-19 05/09/2017 ZR-95 4.444 No MW-PB-19 05/09/2017 NB-95 2.545 No MW-PB-19 05/09/2017 LA-140 6.123 No MW-PB-19 05/09/2017 C0-58 2.6 No MW-PB-19 05/09/2017 ZN-65 4.445 No MW-PB-19 05/09/2017 FE-59 5.426 No MW-PB-19 05/09/2017 BA-140 17.98 No MW-PB-19 05/09/2017 GR-A (DIS) 0.696 No MW-PB-19 05/09/2017 GR-B (DIS) 2.34 Yes MW-PB-19 05/09/2017 SR-90 0.913 No MW-PB-19 05/09/2017 SR-89 9.71 No MW-PB-2 04/25/2016 1-131 11.27 No MW-PB-2 04/25/2016 CS-137 6.268 No MW-PB-2 04/25/2016 SR-90 0.451 No MW-PB-2 04/25/2016 C0-60 5.698 No MW-PB-2 04/25/2016 GR-A (SUS) 1.25 No MW-PB-2 04/25/2016 GR-B (SUS) 2.28 No MW-PB-2 04/25/2016 K-40 41.28 No MW-PB-2 04/25/2016 BE-7 49.99 No GHD 11137316 (1)

TABLE 5.2 Page 15 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-2 04/25/2016 U-233/234 2.986 Yes MW-PB-2 04/25/2016 MN-54 6.198 No MW-PB-2 04/25/2016 CS-134 6.842 No MW-PB-2 04/25/2016 ZR-95 11 .26 No MW-PB-2 04/25/2016 NB-95 6.797 No MW-PB-2 04/25/2016 PU-238 (AS) 0.03443 No MW-PB-2 04/25/2016 LA-140 11.02 No MW-PB-2 04/25/2016 C0-58 6.421 No MW-PB-2 04/25/2016 ZN-65 8.95 No MW-PB-2 04/25/2016 SR-89 5.25 No MW-PB-2 04/25/2016 AM-241 (AS) 0.191 No MW-PB-2 04/25/2016 FE-59 11 .92 No MW-PB-2 04/25/2016 BA-140 31 .23 No MW-PB-2 04/25/2016 U-235 (AS) 0.03383 No MW-PB-2 04/25/2016 CM-242 (AS) 0.04457 No MW-PB-2 04/25/2016 U-238 2.109 Yes MW-PB-2 04/25/2016 GR-A (DIS) 2.05 Yes MW-PB-2 04/25/2016 GR-B (DIS) 5.32 Yes MW-PB-2 04/25/2016 CM-243/244 (AS) 0.126 No MW-PB-2 04/25/2016 PU-239/240 (AS) 0.06415 No MW-PB-2 05/09/2017 1-131 14.14 No MW-PB-2 05/09/2017 CS-137 3.933 No MW-PB-2 05/09/2017 SR-90 0.796 No MW-PB-2 05/09/2017 C0-60 4.176 No MW-PB-2 05/09/2017 GR-A (SUS) 0.796 No MW-PB-2 05/09/2017 GR-B (SUS) 1.43 No MW-PB-2 05/09/2017 K-40 36.27 No MW-PB-2 05/09/2017 BE-7 33.88 No MW-PB-2 05/09/2017 MN-54 3.404 No MW-PB-2 05/09/2017 CS-134 4.046 No MW-PB-2 05/09/2017 ZR-95 8.108 No MW-PB-2 05/09/2017 NB-95 4.125 No MW-PB-2 05/09/2017 LA-140 8.507 No MW-PB-2 05/09/2017 C0-58 4.065 No MW-PB-2 05/09/2017 ZN-65 6.57 No MW-PB-2 05/09/2017 SR-89 5.09 No MW-PB-2 05/09/2017 FE-59 9.222 No MW-PB-2 05/09/2017 BA-140 28.25 No MW-PB-2 05/09/2017 GR-A {DIS) 3.59 Yes MW-PB-2 05/09/2017 GR-B (DIS) 6.03 Yes MW-PB-20 04/25/2016 1-131 12.93 No MW-PB-20 04/25/2016 CS-137 6.075 No MW-PB-20 04/25/2016 SR-90 0.65 ' No MW-PB-20 04/25/2016 C0-60 10.21 - No GHD 11137316 (1)

TABLE 5.2 Page 16 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-20 04/25/2016 GR-A (SUS) 0.895 No MW-PB-20 04/25/2016 GR-B (SUS) 1.59 No MW-PB-20 04/25/2016 K-40 74.62 No MW-PB-20 04/25/2016 BE-7 60.72 No MW-PB-20 04/25/2016 U-233/234 0.0576 No MW-PB-20 04/25/2016 MN-54 4 .235 No MW-PB-20 04/25/2016 CS-134 5.346 No MW-PB-20 04/25/2016 ZR-95 8.379 No MW-PB-20 04/25/2016 NB-95 4.993 No MW-PB-20 04/25/2016 PU-238 (AS) 0.1425 No MW-PB-20 04/25/2016 LA-140 5.625 No MW-PB-20 04/25/2016 Nl-63 4 No MW-PB-20 04/25/2016 C0-58 5.616 No MW-PB-20 04/25/2016 ZN-65 12.28 No MW-PB-20 04/25/2016 SR-89 4.49 No MW-PB-20 04/25/2016 AM-241 (AS) 0.09776 No MW-PB-20 04/25/2016 FE-59 13.02 No MW-PB-20 04/25/2016 FE-55 134 No MW-PB-20 04/25/2016 BA-140 35.37 No MW-PB-20 04/25/2016 U-235 (AS) 0.1233 No MW-PB-20 04/25/2016 CM-242 (AS) 0.01895 No MW-PB-20 04/25/2016 U-238 0.09975 No MW-PB-20 04/25/2016 GR-B (DIS) 11 .3 Yes MW-PB-20 04/25/2016 CM-243/244 (AS) 0.01895 No MW-PB-20 04/25/2016 PU-239/240 (AS) 0.06376 No MW-PB-20 04/25/2016 GR-A (DIS) 5.53 No MW-PB-20 05/09/2017 1-131 9.244 No MW-PB-20 05/09/2017 CS-137 2.042 No MW-PB-20 05/09/2017 C0-60 2.12 No MW-PB-20 05/09/2017 K-40 33.61 No MW-PB-20 05/09/2017 BE-7 18.59 No MW-PB-20 05/09/2017 MN-54 1.938 No MW-PB-20 05/09/2017 CS-134 2.236 No MW-PB-20 05/09/2017 ZR-95 3.74 No MW-PB-20 05/09/2017 NB-95 2.537 No MW-PB-20 05/09/2017 LA-140 5.369 No MW-PB-20 05/09/2017 C0-58 2.215 No MW-PB-20 05/09/2017 ZN-65 4.011 No MW-PB-20 05/09/2017 FE-59 4.473 No MW-PB-20 05/09/2017 BA-140 16.59 No MW-PB-21 04/26/2016 1-131 12.76 No MW-PB-21 04/26/2016 CS-137 5.979 No MW-PB-21 04/26/2016 SR-90 0.89 No MW-PB-21 04/26/2016 C0-60 6.991 No GHD 11137316 (1)

TABLE 5.2 Page 17 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-21 04/26/2016 GR-A (SUS) 0.872 No MW-PB-21 04/26/2016 GR-B (SUS) 1.58 No MW-PB-21 04/26/2016 K-40 61 .84 No MW-PB-21 04/26/2016 BE-7 61 .28 No MW-PB-21 04/26/2016 U-233/234 0.1417 No MW-PB-21 04/26/2016 MN-54 6.455 No MW-PB-21 04/26/2016 CS-134 6.425 No MW-PB-21 04/26/2016 ZR-95 12.8 No MW-PB-21 04/26/2016 NB-95 5.968 No MW-PB-21 04/26/2016 PU-238 (AS) 0.02647 No MW-PB-21 04/26/2016 LA-140 10.38 No MW-PB-21 04/26/2016 Nl-63 4.09 No MW-PB-21 04/26/2016 C0-58 6 .554 No MW-PB-21 04/26/2016 ZN-65 11 .01 No MW-PB-21 04/26/2016 SR-89 9.7 No MW-PB-21 04/26/2016 AM-241 (AS) 0.02536 No MW-PB-21 04/26/2016 FE-59 11 .26 No MW-PB-21 04/26/2016 FE-55 137.8 No MW-PB-21 04/26/2016 BA-140 35.49 No MW-PB-21 04/26/2016 U-235 (AS) 0.1997 No MW-PB-21 04/26/2016 CM-242 (AS) 0.06613 No MW-PB-21 04/26/2016 U-238 0.1552 No MW-PB-21 04/26/2016 GR-A (DIS) 4 .65 No MW-PB-21 04/26/2016 GR-B (DIS) 50.7 Yes MW-PB-21 04/26/2016 CM-243/244 (AS) 0.0251 No MW-PB-21 04/26/2016 PU-239/240 (AS) 0.0986 No MW-PB-21 05/09/2017 1-131 14.4 No MW-PB-21 05/09/2017 CS-137 3.398 No MW-PB-21 05/09/2017 C0-60 3.354 No MW-PB-21 05/09/2017 K-40 81.82 No MW-PB-21 05/09/2017 BE-7 31.79 No MW-PB-21 05/09/2017 MN-54 3.195 No MW-PB-21 05/09/2017 CS-134 3.506 No MW-PB-21 05/09/2017 ZR-95 5.997 No MW-PB-21 05/09/2017 NB-95 4.077 No MW-PB-21 05/09/2017 LA-140 7.008 No MW-PB-21 05/09/2017 C0-58 3.464 No MW-PB-21 05/09/2017 ZN-65 6.477 No MW-PB-21 05/09/2017 FE-59 7.666 No MW-PB-21 05/09/2017 BA-140 27.57 No MW-PB-22 04/26/2016 1-131 12.01 No MW-PB-22 04/26/2016 CS-137 5.879 No MW-PB-22 04/26/2016 SR-90 0.594 No MW-PB-22 04/26/2016 C0-60 6.229 No GHD 11137316 (1)

TABLE 5.2 Page 18 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-22 04/26/2016 GR-A (SUS) 0.867 No MW-PB-22 04/26/2016 GR-B (SUS) 1.57 No MW-PB-22 04/26/2016 K-40 47.91 No MW-PB-22 04/26/2016 BE-7 46.59 No MW-PB-22 04/26/2016 U-233/234 0.173 No MW-PB-22 04/26/2016 MN-54 4.915 No MW-PB-22 04/26/2016 CS-134 5.005 No MW-PB-22 04/26/2016 ZR-95 9.211 No MW-PB-22 04/26/2016 NB-95 5.775 No MW-PB-22 04/26/2016 PU-238 (AS) 0.02809 No MW-PB-22 04/26/2016 LA-140 7.864 No MW-PB-22 04/26/2016 Nl-63 4.19 No MW-PB-22 04/26/2016 C0-58 5.364 No MW-PB-22 04/26/2016 ZN-65 11.15 No MW-PB-22 04/26/2016 SR-89 6.35 No MW-PB-22 04/26/2016 AM-241 {AS) 0.03882 No MW-PB-22 04/26/2016 FE-59 11 .34 No MW-PB-22 04/26/2016 FE-55 161 No MW-PB-22 04/26/2016 BA-140 31 .15 No MW-PB-22 04/26/2016 U-235 (AS) 0.1886 No MW-PB-22 04/26/2016 CM-242 (AS) 0.03843 No MW-PB-22 04/26/2016 U-238 0.1631 No MW-PB-22 04/26/2016 GR-A {DIS) 1.29 No MW-PB-22 04/26/2016 GR-B {DIS) 3.48 Yes MW-PB-22 04/26/2016 CM-243/244 (AS) 0.03843 No MW-PB-22 04/26/2016 PU-239/240 (AS) 0.0906 No MW-PB-22 05/09/2017 1-131 10.59 No MW-PB-22 05/09/2017 CS-137 2.893 No MW-PB-22 05/09/2017 C0-60 2.827 No MW-PB-22 05/09/2017 K-40 26.28 No MW-PB-22 05/09/2017 BE-7 26.05 No MW-PB-22 05/09/2017 MN-54 2.483 No MW-PB-22 05/09/2017 CS-134 2.958 No MW-PB-22 05/09/2017 ZR-95 5.223 No MW-PB-22 05/09/2017 NB-95 3.262 No MW-PB-22 05/09/2017 LA-140 6.815 No MW-PB-22 05/09/2017 C0-58 2.909 No MW-PB-22 05/09/2017 ZN-65 5.256 No MW-PB-22 05/09/2017 FE-59 6.374 No MW-PB-22 05/09/2017 BA-140 22.99 No MW-PB-24 04/26/2016 1-131 14.04 No MW-PB-24 04/26/2016 CS-137 7.057 No MW-PB-24 04/26/2016 SR-90 0.359 No MW-PB-24 04/26/2016 C0-60 5.093 No GHD 11137316 {1)

TABLE 5.2 Page 19 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-24 04/26/2016 GR-A (SUS) 1.08 No MW-PB-24 04/26/2016 GR-B (SUS) 1.67 No MW-PB-24 04/26/2016 K-40 58.15 No MW-PB-24 04/26/2016 BE-7 53.23 No MW-PB-24 04/26/2016 U-233/234 0.1004 No MW-PB-24 04/26/2016 MN-54 7.865 No MW-PB-24 04/26/2016 CS-134 5.988 No MW-PB-24 04/26/2016 ZR-95 13.89 No MW-PB-24 04/26/2016 NB-95 6.753 No MW-PB-24 04/26/2016 PU-238 (AS) 0.02503 No MW-PB-24 04/26/2016 LA-140 12.08 No MW-PB-24 04/26/2016 Nl-63 4 .05 No MW-PB-24 04/26/2016 C0-58 6 .001 No MW-PB-24 04/26/2016 ZN-65 8.676 No MW-PB-24 04/26/2016 SR-89 6.27 No MW-PB-24 04/26/2016 AM-241 {AS) 0.0303 No MW-PB-24 04/26/2016 FE-59 12.14 No MW-PB-24 04/26/2016 FE-55 140.6 No MW-PB-24 04/26/2016 BA-140 41.17 No MW-PB-24 04/26/2016 U-235 (AS) 0.08775 No MW-PB-24 04/26/2016 CM-242 (AS) 0.02999 No MW-PB-24 04/26/2016 U-238 0.1296 No MW-PB-24 04/26/2016 GR-A {DIS) 2.05 No MW-PB-24 04/26/2016 GR-B (DIS) 5.28 Yes MW-PB-24 04/26/2016 CM-243/244 (AS) 0.02999 No MW-PB-24 04/26/2016 PU-239/240 (AS) 0.09324 No MW-PB-24 10/10/2016 1-131 9.615 No MW-PB-24 10/10/2016 CS-137 5.213 No MW-PB-24 10/10/2016 C0-60 5.459 No MW-PB-24 10/10/2016 K-40 85.25 No MW-PB-24 10/10/2016 BE-7 46.7 No MW-PB-24 10/10/2016 MN-54 5.403 No MW-PB-24 10/10/2016 CS-134 5.134 No MW-PB-24 10/10/2016 ZR-95 8.863 No MW-PB-24 10/10/2016 NB-95 6 .335 No MW-PB-24 10/10/2016 LA-140 7.815 No MW-PB-24 10/10/2016 C0-58 6.021 No MW-PB-24 10/10/2016 ZN-65 10.39 No MW-PB-24 10/10/2016 FE-59 10.73 No MW-PB-24 10/10/2016 BA-140 27.79 No MW-PB-24 05/09/2017 1-131 13.19 No MW-PB-24 05/09/2017 CS-137 3.858 No MW-PB-24 05/09/2017 C0-60 3.939 No MW-PB-24 05/09/2017 GR-A (SUS) 0.52 No GHD 11137316 (1)

TABLE 5.2 Page 20 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-24 05/09/2017 GR-B (SUS) 1.5 No MW-PB-24 05/09/2017 K-40 30.18 No MW-PB-24 05/09/2017 BE-7 32.89 No MW-PB-24 05/09/2017 U-233/234 0.1227 No MW-PB-24 05/09/2017 MN-54 3.465 No MW-PB-24 05/09/2017 CS-134 3.81 No MW-PB-24 05/09/2017 ZR-95 7.417 No MW-PB-24 05/09/2017 NB-95 4.091 No MW-PB-24 05/09/2017 PU-238 (AS) 0.0562 No MW-PB-24 05/09/2017 LA-140 9.667 No MW-PB-24 05/09/2017 Nl-63 3.88 No MW-PB-24 05/09/2017 C0-58 3.831 No MW-PB-24 05/09/2017 ZN-65 7.418 No MW-PB-24 05/09/2017 RA-226 109.8 Yes MW-PB-24 05/09/2017 AM-241 (AS) 0.1563 No MW-PB-24 05/09/2017 FE-59 8.804 No MW-PB-24 05/09/2017 FE-55 168.9 No MW-PB-24 05/09/2017 BA-140 27.43 No MW-PB-24 05/09/2017 U-235 (AS) 0.1517 No MW-PB-24 05/09/2017 CM-242 (AS) 0.07294 No MW-PB-24 05/09/2017 U-238 0.1227 No MW-PB-24 05/09/2017 GR-A (DIS) 1.18 No MW-PB-24 05/09/2017 GR-B (DIS) 3.31 Yes MW-PB-24 05/09/2017 CM-243/244 (AS) 0.1153 No MW-PB-24 05/09/2017 PU-239/240 (AS) 0.09992 No MW-PB-24 05/09/2017 SR-90 0.966 No MW-PB-24 05/09/2017 SR-89 9.19 No MW-PB-25 04/26/2016 1-131 11.98 No MW-PB-25 04/26/2016 CS-137 6.221 No MW-PB-25 04/26/2016 SR-90 0.366 No MW-PB-25 04/26/2016 C0-60 8.243 No MW-PB-25 04/26/2016 GR-A (SUS) 1.06 No MW-PB-25 04/26/2016 GR-B (SUS) 1.66 No MW-PB-25 04/26/2016 K-40 131.1 No MW-PB-25 04/26/2016 BE-7 50.06 No MW-PB-25 04/26/2016 U-233/234 1.537 Yes MW-PB-25 04/26/2016 MN-54 6.337 No MW-PB-25 04/26/2016 CS-134 5.411 No MW-PB-25 04/26/2016 ZR-95 9.79 No MW-PB-25 04/26/2016 NB-95 6.394 No MW-PB-25 04/26/2016 PU-238 (AS) 0.02907 No MW-PB-25 04/26/2016 LA-140 14.33 No MW-PB-25 04/26/2016 Nl-63 4.11 No MW-PB-25 04/26/2016 C0-58 6.366 No GHD 11137316 (1)

TABLE 5.2 Page 21of39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-25 04/26/2016 ZN-65 10.42 No MW-PB-25 04/26/2016 SR-89 3.73 No MW-PB-25 04/26/2016 AM-241 (AS) 0.1227 No MW-PB-25 04/26/2016 FE-59 11.07 No MW-PB-25 04/26/2016 FE-55 99.74 No MW-PB-25 04/26/2016 BA-140 30.12 No MW-PB-25 04/26/2016 U-235 (AS) 0.03778 No MW-PB-25 04/26/2016 CM-242 (AS) 0.01744 No MW-PB-25 04/26/2016 U-238 0.4966 Yes MW-PB-25 04/26/2016 GR-A (DIS) 1.07 No MW-PB-25 04/26/2016 GR-B (DIS) 11.5 Yes MW-PB-25 04/26/2016 CM-243/244 (AS) 0.08592 No MW-PB-25 04/26/2016 PU-239/240 (AS) 0.1083 No MW-PB-25 10/10/2016 1-131 14.24 No MW-PB-25 10/10/2016 CS-137 8.986 No MW-PB-25 10/10/2016 C0-60 7.109 No MW-PB-25 10/10/2016 K-40 108.3 No MW-PB-25 10/10/2016 BE-7 65.54 No MW-PB-25 10/10/2016 MN-54 7.663 No MW-PB-25 10/10/2016 CS-134 5.652 No MW-PB-25 10/10/2016 ZR-95 14.74 No MW-PB-25 10/10/2016 NB-95 5.774 No MW-PB-25 10/10/2016 LA-140 8.02 No MW-PB-25 10/10/2016 C0-58 5.718 No MW-PB-25 10/10/2016 ZN-65 16.14 No MW-PB-25 10/10/2016 FE-59 16.49 No MW-PB-25 10/10/2016 BA-140 35.46 No MW-PB-25 05/09/2017 1-131 11.93 No MW-PB-25 05/09/2017 CS-137 3.144 No MW-PB-25 05/09/2017 SR-90 0.686 No MW-PB-25 05/09/2017 C0-60 3.024 No MW-PB-25 05/09/2017 GR-A (SUS) 0.513 No MW-PB-25 05/09/2017 GR-B (SUS) 1.49 No MW-PB-25 05/09/2017 K-40 57.87 No MW-PB-25 05/09/2017 BE-7 31.01 No MW-PB-25 05/09/2017 U-233/234 0.606 Yes MW-PB-25 05/09/2017 MN-54 3.026 No MW-PB-25 05/09/2017 CS-134 3.136 No MW-PB-25 05/09/2017 ZR-95 5.7 No MW-PB-25 05/09/2017 NB-95 3.331 No MW-PB-25 05/09/2017 PU-238 (AS) 0.07609 No MW-PB-25 05/09/2017 LA-140 7.223 No MW-PB-25 05/09/2017 Nl-63 4.09 No MW-PB-25 05/09/2017 C0-58 3.193 No GHD 11137316 (1)

TABLE 5.2 Page 22 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-25 05/09/2017 ZN-65 5.342 No MW-PB-25 05/09/2017 SR-89 5.81 No MW-PB-25 05/09/2017 AM-241 (AS) 0.08503 No MW-PB-25 05/09/2017 FE-59 6.785 No MW-PB-25 05/09/2017 FE-55 188.8 No MW-PB-25 05/09/2017 BA-140 23.8 No MW-PB-25 05/09/2017 U-235 (AS) 0.1022 No MW-PB-25 05/09/2017 CM-242 (AS) 0.0972 No MW-PB-25 05/09/2017 U-238 0.2876 Yes MW-PB-25 05/09/2017 GR-A (DIS) 0.801 No MW-PB-25 05/09/2017 GR-B (DIS) 8.48 Yes MW-PB-25 05/09/2017 CM-243/244 (AS) 0.04862 No MW-PB-25 05/09/2017 PU-239/240 (AS) 0.1417 No MW-PB-26 04/26/2016 1-131 12.44 No MW-PB-26 04/26/2016 CS-137 4 .668 No MW-PB-26 04/26/2016 SR-90 0.496 No MW-PB-26 04/26/2016 C0-60 6.034 No MW-PB-26 04/26/2016 GR-A (SUS) 1.25 Yes MW-PB-26 04/26/2016 GR-B (SUS) 1.63 No MW-PB-26 04/26/2016 K-40 35.93 No MW-PB-26 04/26/2016 BE-7 46.09 No MW-PB-26 04/26/2016 U-233/234 4.218 Yes MW-PB-26 04/26/2016 MN-54 4.954 No MW-PB-26 04/26/2016 CS-134 4 .617 No MW-PB-26 04/26/2016 ZR-95 9.721 No MW-PB-26 04/26/2016 NB-95 5.459 No MW-PB-26 04/26/2016 PU-238 (AS) 0.024 No MW-PB-26 04/26/2016 LA-140 9.187 No MW-PB-26 04/26/2016 Nl-63 4.06 No MW-PB-26 04/26/2016 C0-58 5.419 No MW-PB-26 04/26/2016 ZN-65 9.378 No MW-PB-26 04/26/2016 SR-89 7.48 No MW-PB-26 04/26/2016 AM-241 (AS) 0.09456 No MW-PB-26 04/26/2016 FE-59 10.43 No MW-PB-26 04/26/2016 FE-55 168.8 No MW-PB-26 04/26/2016 BA-140 23.67 No MW-PB-26 04/26/2016 U-235 (AS) 0.03005 No MW-PB-26 04/26/2016 CM-242 (AS) 0.03554 No MW-PB-26 04/26/2016 U-238 1.713 Yes MW-PB-26 04/26/2016 GR-A (DIS) 1.87 Yes MW-PB-26 04/26/2016 GR-B (DIS) 5.35 Yes MW-PB-26 04/26/2016 CM-243/244 (AS) 0.0662 No MW-PB-26 04/26/2016 PU-239/240 (AS) 0.06323 No MW-PB-26 04/26/2016 1-131 8.686 No GHD 11137316 (1)

TABLE 5.2 Page 23 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-26 04/26/2016 CS-137 3.837 No MW-PB-26 04/26/2016 SR-90 0.611 No MW-PB-26 04/26/2016 C0-60 3.56 No MW-PB-26 04/26/2016 GR-A (SUS) 0.775 No MW-PB-26 04/26/2016 GR-B (SUS) 1.62 No MW-PB-26 04/26/2016 K-40 30.22 No MW-PB-26 04/26/2016 BE-7 30.72 No MW-PB-26 04/26/2016 U-233/234 4 .815 Yes MW-PB-26 04/26/2016 MN-54 3.296 No MW-PB-26 04/26/2016 CS-134 3.602 No MW-PB-26 04/26/2016 ZR-95 6.475 No MW-PB-26 04/26/2016 NB-95 3.727 No MW-PB-26 04/26/2016 PU-238 (AS) 0.02671 No MW-PB-26 04/26/2016 LA-140 6.399 No MW-PB-26 04/26/2016 Nl-63 4.17 No MW-PB-26 04/26/2016 C0-58 3.169 No MW-PB-26 04/26/2016 ZN-65 6.896 No MW-PB-26 04/26/2016 SR-89 6.77 No MW-PB-26 04/26/2016 AM-241 (AS) 0.05422 No MW-PB-26 04/26/2016 FE-59 7.651 No MW-PB-26 04/26/2016 FE-55 127.4 No MW-PB-26 04/26/2016 BA-140 21 .13 No MW-PB-26 04/26/2016 U-235 (AS) 0.1076 No MW-PB-26 04/26/2016 CM-242 (AS) 0.02038 No MW-PB-26 04/26/2016 U-238 2.195 Yes MW-PB-26 04/26/2016 GR-A {DIS) 1.55 Yes MW-PB-26 04/26/2016 GR-B (DIS) 3.75 Yes MW-PB-26 04/26/2016 CM-243/244 (AS) 0.02038 No MW-PB-26 04/26/2016 PU-239/240 (AS) 0.04976 No MW-PB-26 10/10/2016 1-131 9.882 No MW-PB-26 10/10/2016 CS-137 5.642 No MW-PB-26 10/10/2016 C0-60 5.37 No MW-PB-26 10/10/2016 K-40 77.87 No MW-PB-26 10/10/2016 BE-7 47.81 No MW-PB-26 10/10/2016 MN-54 5.024 No MW-PB-26 10/10/2016 CS-134 4.814 No MW-PB-26 10/10/2016 ZR-95 7.777 No MW-PB-26 10/10/2016 NB-95 5.425 No MW-PB-26 10/10/2016 LA-140 6.84 No MW-PB-26 10/10/2016 C0-58 5.778 No MW-PB-26 10/10/2016 ZN-65 11 .04 No MW-PB-26 10/10/2016 FE-59 9.693 No MW-PB-26 10/10/2016 BA-140 24.3 No MW-PB-26 05/09/2017 1-131 10.04 No GHD 11137316 (1)

TABLE 5.2 Page 24 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-26 05/09/2017 CS-137 2.867 No MW-PB-26 05/09/2017 SR-90 0.814 No MW-PB-26 05/09/2017 C0-60 2.63 No MW-PB-26 05/09/2017 GR-A (SUS) 0.513 No MW-PB-26 05/09/2017 GR-B (SUS) 1.49 No MW-PB-26 05/09/2017 K-40 23.42 No MW-PB-26 05/09/2017 BE-7 28.03 No MW-PB-26 05/09/2017 U-233/234 5.399 Yes MW-PB-26 05/09/2017 MN-54 2.677 No MW-PB-26 05/09/2017 CS-134 3.095 No MW-PB-26 05/09/2017 ZR-95 4.995 No MW-PB-26 05/09/2017 NB-95 3.17 No MW-PB-26 05/09/2017 PU-238 (AS) 0.04387 No MW-PB-26 05/09/2017 LA-140 6.548 No MW-PB-26 05/09/2017 Nl-63 3.96 No MW-PB-26 05/09/2017 C0-58 2.806 No MW-PB-26 05/09/2017 ZN-65 5.226 No MW-PB-26 05/09/2017 SR-89 3.94 No MW-PB-26 05/09/2017 AM-241 (AS) 0.04774 No MW-PB-26 05/09/2017 FE-59 5.971 No MW-PB-26 05/09/2017 FE-55 123.7 No MW-PB-26 05/09/2017 BA-140 22.59 No MW-PB-26 05/09/2017 U-235 (AS) 0.1162 No MW-PB-26 05/09/2017 CM-242 (AS) 0.07471 No MW-PB-26 05/09/2017 U-238 1.478 Yes MW-PB-26 05/09/2017 GR-A (DIS) 2.65 Yes MW-PB-26 05/09/2017 GR-B (DIS) 5.14 Yes MW-PB-26 05/09/2017 CM-243/244 (AS) 0.1494 No MW-PB-26 05/09/2017 PU-239/240 (AS) 0.1103 No MW-PB-27 04/26/2016 1-131 12.37 No MW-PB-27 04/26/2016 CS-137 5.435 No MW-PB-27 04/26/2016 SR-90 0.779 No MW-PB-27 04/26/2016 C0-60 4.627 No MW-PB-27 04/26/2016 GR-A (SUS) 0.363 No MW-PB-27 04/26/2016 GR-B (SUS) 1.63 No MW-PB-27 04/26/2016 K-40 42.66 No MW-PB-27 04/26/2016 BE-7 43.1 No MW-PB-27 04/26/2016 U-233/234 5 Yes MW-PB-27 04/26/2016 MN-54 4.395 No MW-PB-27 04/26/2016 CS-134 4.91 No MW-PB-27 04/26/2016 ZR-95 8.252 No MW-PB-27 04/26/2016 NB-95 7.112 No MW-PB-27 04/26/2016 PU-238 (AS) 0.02883 No MW-PB-27 04/26/2016 LA-140 7.958 No GHD 11137316 (1)

TABLE 5.2 Page 25 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-27 04/26/2016 Nl-63 4.17 No MW-PB-27 04/26/2016 C0-58 4.264 No MW-PB-27 04/26/2016 ZN-65 10.1 No MW-PB-27 04/26/2016 SR-89 5.45 No MW-PB-27 04/26/2016 TH-228 13.33 Yes MW-PB-27 04/26/2016 AM-241 (AS) 0.112 No MW-PB-27 04/26/2016 FE-59 9.706 No MW-PB-27 04/26/2016 FE-55 143.6 No MW-PB-27 04/26/2016 BA-140 30.03 No MW-PB-27 04/26/2016 U-235 (AS) 0.0701 No MW-PB-27 04/26/2016 CM-242 (AS) 0.06403 No MW-PB-27 04/26/2016 U-238 3.346 Yes MW-PB-27 04/26/2016 GR-A (DIS) 2.57 Yes MW-PB-27 04/26/2016 GR-B (DIS) 5.05 Yes MW-PB-27 04/26/2016 CM-243/244 (AS) 0.06403 No MW-PB-27 04/26/2016 PU-239/240 (AS) 0.07594 No MW-PB-27 10/10/2016 1-131 13.22 No MW-PB-27 10/10/2016 CS-137 6.665 No MW-PB-27 10/10/2016 C0-60 6.652 No MW-PB-27 10/10/2016 K-40 84.85 No MW-PB-27 10/10/2016 BE-7 63.7 No MW-PB-27 10/10/2016 MN-54 6.044 No MW-PB-27 10/10/2016 CS-134 6.894 No MW-PB-27 10/10/2016 ZR-95 11.44 No MW-PB-27 10/10/2016 NB-95 9.828 No MW-PB-27 10/10/2016 LA-140 11.26 No MW-PB-27 10/10/2016 C0-58 7.189 No MW-PB-27 10/10/2016 ZN-65 12.48 No MW-PB-27 10/10/2016 FE-59 15.02 No MW-PB-27 10/10/2016 BA-140 37.53 No MW-PB-27 05/09/2017 1-131 10.33 No MW-PB-27 05/09/2017 CS-137 2.949 No MW-PB-27 05/09/2017 SR-90 0.713 No MW-PB-27 05/09/2017 C0-60 3.31 No MW-PB-27 05/09/2017 GR-A (SUS) 0.51 No MW-PB-27 05/09/2017 GR-B (SUS) 1.49 No MW-PB-27 05/09/2017 K-40 56.88 No MW-PB-27 05/09/2017 BE-7 29.66 No MW-PB-27 05/09/2017 U-233/234 5.64 Yes MW-PB-27 05/09/2017 MN-54 3.122 No MW-PB-27 05/09/2017 CS-134 3.728 No MW-PB-27 05/09/2017 ZR-95 5.877 No MW-PB-27 05/09/2017 NB-95 3.923 No MW-PB-27 05/09/2017 PU-238 (AS) 0.0725 No GHD 11137316 (1)

TABLE 5.2 Page 26 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-27 05/09/2017 LA-140 6.755 No MW-PB-27 05/09/2017 Nl-63 3.93 No MW-PB-27 05/09/2017 C0-58 3.391 No MW-PB-27 05/09/2017 ZN-65 5.881 No MW-PB-27 05/09/2017 SR-89 4.58 No MW-PB-27 05/09/2017 AM-241 (AS) 0.07476 No MW-PB-27 05/09/2017 FE-59 7.648 No MW-PB-27 05/09/2017 FE-55 163.7 No MW-PB-27 05/09/2017 BA-140 20.99 No MW-PB-27 05/09/2017 U-235 (AS) 0.1336 No MW-PB-27 05/09/2017 CM-242 (AS) 0.05234 No MW-PB-27 05/09/2017 U-238 2.576 Yes MW-PB-27 05/09/2017 GR-A (DIS) 2.12 Yes MW-PB-27 05/09/2017 GR-B (DIS) 4.49 Yes MW-PB-27 05/09/2017 CM-243/244 (AS) 0.1282 No MW-PB-27 05/09/2017 PU-239/240 (AS) 0.1822 No MW-PB-27 05/09/2017 1-131 7.847 No MW-PB-27 05/09/2017 CS-137 2.153 No MW-PB-27 05/09/2017 SR-90 0.698 No MW-PB-27 05/09/2017 C0-60 2.19 No MW-PB-27 05/09/2017 GR-A (SUS) 0.51 No MW-PB-27 05/09/2017 GR-B (SUS) 1.49 No MW-PB-27 05/09/2017 K-40 19.73 No MW-PB-27 05/09/2017 BE-7 23.14 No MW-PB-27 05/09/2017 U-233/234 5.082 Yes MW-PB-27 05/09/2017 MN-54 2.348 No MW-PB-27 05/09/2017 CS-134 2.582 No MW-PB-27 05/09/2017 ZR-95 4.091 No MW-PB-27 05/09/2017 NB-95 2.741 No MW-PB-27 05/09/2017 PU-238 (AS) 0.04182 No MW-PB-27 05/09/2017 LA-140 5.289 No MW-PB-27 05/09/2017 Nl-63 3.87 No MW-PB-27 05/09/2017 C0-58 2.52 No MW-PB-27 05/09/2017 ZN-65 4.482 No MW-PB-27 05/09/2017 SR-89 4.31 No MW-PB-27 05/09/2017 TH-228 6.755 Yes MW-PB-27 05/09/2017 AM-241 (AS) 0.05435 No MW-PB-27 05/09/2017 FE-59 5.5 No MW-PB-27 05/09/2017 FE-55 148.9 No MW-PB-27 05/09/2017 BA-140 17.03 No MW-PB-27 05/09/2017 U-235 (AS) 0.1064 No MW-PB-27 05/09/2017 CM-242 (AS) 0.04813 No MW-PB-27 05/09/2017 U-238 1.23 Yes MW-PB-27 05/09/2017 GR-A (DIS) 2.31 Yes GHD 11137316 (1)

TABLE 5.2 Page 27 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-27 05/09/2017 GR-B (DIS) 5.08 Yes MW-PB-27 05/09/2017 CM-243/244 (AS) 0.1939 No MW-PB-27 05/09/2017 PU-239/240 (AS) 0.1287 No MW-PB-28 04/25/2016 1-131 11 .5 No MW-PB-28 04/25/2016 CS-137 5.024 No MW-PB-28 04/25/2016 SR-90 0.465 No MW-PB-28 04/25/2016 C0-60 4.65 No MW-PB-28 04/25/2016 GR-A (SUS) 2.83 Yes MW-PB-28 04/25/2016 GR-B (SUS) 3.62 Yes MW-PB-28 04/25/2016 K-40 103.5 No MW-PB-28 04/25/2016 BE-7 39.56 No MW-PB-28 04/25/2016 U-233/234 0.08385 No MW-PB-28 04/25/2016 MN-54 4.604 No MW-PB-28 04/25/2016 CS-134 4.558 No MW-PB-28 04/25/2016 ZR-95 6.973 No MW-PB-28 04/25/2016 NB-95 5.15 No MW-PB-28 04/25/2016 PU-238 (AS) 0.02435 No MW-PB-28 04/25/2016 LA-140 9.436 No MW-PB-28 04/25/2016 C0-58 4.851 No MW-PB-28 04/25/2016 ZN-65 10.69 No MW-PB-28 04/25/2016 SR-89 7.49 No MW-PB-28 04/25/2016 AM-241 (AS) 0.1066 No MW-PB-28 04/25/2016 FE-59 10.32 No MW-PB-28 04/25/2016 BA-140 26.18 No MW-PB-28 04/25/2016 U-235 (AS) 0.1371 No MW-PB-28 04/25/2016 CM -242 (AS) 0.06677 No MW-PB-28 04/25/2016 U-238 0.1224 No MW-PB-28 04/25/2016 GR-A (DIS) 1.02 No MW-PB-28 04/25/2016 GR-B (DIS) 4.71 Yes MW-PB-28 04/25/2016 CM-243/244 (AS) 0.1056 No MW-PB-28 04/25/2016 PU-239/240 (AS) 0.06415 No MW-PB-28 05/09/2017 1-131 9.372 No MW-PB-28 05/09/2017 CS-137 2.941 No MW-PB-28 05/09/2017 SR-90 0.778 No MW-PB-28 05/09/2017 C0-60 2.539 No MW-PB-28 05/09/2017 GR-A (SUS) 0.868 No MW-PB-28 05/09/2017 GR-B (SUS) 1.61 No MW-PB-28 05/09/2017 K-40 59.66 Yes MW-PB-28 05/09/2017 BE-7 25.3 No MW-PB-28 05/09/2017 MN-54 2.714 No MW-PB-28 05/09/2017 CS-134 2.625 No MW-PB-28 05/09/2017 ZR-95 4.891 No MW-PB-28 05/09/2017 NB-95 3.028 No MW-PB-28 05/09/2017 LA-140 7.377 No GHD 11137316 (1)

TABLE 5.2 Page 28 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTTOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-28 05/09/2017 C0-58 2.793 No MW-PB-28 05/09/2017 ZN-65 5.196 No MW-PB-28 05/09/2017 SR-89 5.1 No MW-PB-28 05/09/2017 FE-59 5.803 No MW-PB-28 05/09/2017 BA-140 20.66 No MW-PB-28 05/09/2017 GR-A (DIS) 0.78 No MW-PB-28 05/09/2017 GR-B (DIS) 3.35 Yes MW-PB-29 04/27/2016 1-131 14.16 No MW-PB-29 04/27/2016 CS-137 7.972 No MW-PB-29 04/27/2016 SR-90 0.35 No MW-PB-29 04/27/2016 C0-60 5.914 No MW-PB-29 04/27/2016 GR-A (SUS) 0.362 No MW-PB-29 04/27/2016 GR-B (SUS) 1.63 No MW-PB-29 04/27/2016 K-40 72.28 No MW-PB-29 04/27/2016 BE-7 78.94 No MW-PB-29 04/27/2016 U-233/234 0.11B3 No MW-PB-29 04/27/2016 MN-54 7.09 No MW-PB-29 04/27/2016 CS-134 7.023 No MW-PB-29 04/27/2016 ZR-95 14.22 No MW-PB-29 04/27/2016 NB-95 8.056 No MW-PB-29 04/27/2016 PU-238 (AS) 0.0459 No MW-PB-29 04/27/2016 LA-140 9.93 No MW-PB-29 04/27/2016 C0-58 7.412 No MW-PB-29 04/27/2016 ZN-65 16.87 No MW-PB-29 04/27/2016 SR-89 3.3 No MW-PB-29 04/27/2016 AM-241 (AS) 0.2192 No MW-PB-29 04/27/2016 FE-59 18.9 No MW-PB-29 04/27/2016 BA-140 36.38 No MW-PB-29 04/27/2016 U-235 (AS) 0.1157 No MW-PB-29 04/27/2016 CM-242 (AS) 0.217 No MW-PB-29 04/27/2016 U-238 0.1183 No MW-PB-29 04/27/2016 GR-A (DIS) 0.761 No MW-PB-29 04/27/2016 GR-B (DIS) 2.55 Yes MW-PB-29 04/27/2016 CM-243/244 (AS) 0.217 No MW-PB-29 04/27/2016 PU-239/240 (AS) 0.02464 No MW-PB-29 05/09/2017 1-131 11.48 No MW-PB-29 05/09/2017 CS-137 3.819 No MW-PB-29 05/09/2017 SR-90 0.763 No MW-PB-29 05/09/2017 C0-60 3.895 No MW-PB-29 05/09/2017 GR-A (SUS) 0.845 No MW-PB-29 05/09/2017 GR-B (SUS) 1.59 No MW-PB-29 05/09/2017 K-40 34.14 No MW-PB-29 05/09/2017 BE-7 34.27 No MW-PB-29 05/09/2017 MN-54 3.525 No GHD 11137316 (1)

TABLE 5.2 Page 29 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-29 05/09/2017 CS-134 4.166 No MW-PB-29 05/09/2017 ZR-95 7.215 No MW-PB-29 05/09/2017 NB-95 4.559 No MW-PB-29 05/09/2017 LA-140 10.03 No MW-PB-29 05/09/2017 C0-58 4.084 No MW-PB-29 05/09/2017 ZN-65 8.189 No MW-PB-29 05/09/2017 SR-89 6.39 No MW-PB-29 05/09/2017 FE-59 8.881 No MW-PB-29 05/09/2017 BA-140 25.77 No MW-PB-29 05/09/2017 GR-A (DIS) 0.615 No MW-PB-29 05/09/2017 GR-B (DIS) 2.66 Yes MW-PB-3 04/25/2016 1-131 11.05 No MW-PB-3 04/25/2016 CS-137 4.811 No MW-PB-3 04/25/2016 SR-90 0.527 No MW-PB-3 04/25/2016 C0-60 5.196 No MW-PB-3 04/25/2016 GR-A (SUS) 2.16 Yes MW-PB-3 04/25/2016 GR-B (SUS) 1.63 Yes MW-PB-3 04/25/2016 K-40 83.2 No MW-PB-3 04/25/2016 BE-7 45.47 No MW-PB-3 04/25/2016 U-233/234 1.09 Yes MW-PB-3 04/25/2016 MN-54 5.092 No MW-PB-3 04/25/2016 CS-134 4.865 No MW-PB-3 04/25/2016 ZR-95 8.136 No MW-PB-3 04/25/2016 NB-95 5.463 No MW-PB-3 04/25/2016 PU-238 (AS) 0.04325 No MW-PB-3 04/25/2016 LA-140 7.918 No MW-PB-3 04/25/2016 C0-58 4.854 No MW-PB-3 04/25/2016 ZN-65 9.87 No MW-PB-3 04/25/2016 SR-89 8.47 No MW-PB-3 04/25/2016 AM-241 (AS) 0.1602 No MW-PB-3 04/25/2016 FE-59 12.01 No MW-PB-3 04/25/2016 BA-140 27.36 No MW-PB-3 04/25/2016 U-235 (AS) 0.06865 No MW-PB-3 04/25/2016 CM-242 (AS) 0.07931 No MW-PB-3 04/25/2016 U-238 0.6994 Yes MW-PB-3 04/25/2016 GR-A (DIS) 0.603 No MW-PB-3 04/25/2016 GR-B (DIS) 1.3 Yes MW-PB-3 04/25/2016 CM-243/244 (AS) 0.04258 No MW-PB-3 04/25/2016 PU-239/240 (AS) 0.1611 No MW-PB-3 05/09/2017 1-131 14.55 No MW-PB-3 05/09/2017 CS-137 4.748 No MW-PB-3 05/09/2017 SR-90 0.921 No MW-PB-3 05/09/2017 C0-60 5.451 No MW-PB-3 05/09/2017 GR-A (SUS) 0.795 No GHD 11137316 (1)

TABLE 5.2 Page 30 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-3 05/09/2017 GR-B (SUS) 1.43 No MW-PB-3 05/09/2017 K-40 77.82 No MW-PB-3 05/09/2017 BE-7 45.44 No MW-PB-3 05/09/2017 MN-54 3.994 No MW-PB-3 05/09/2017 CS-134 5.086 No MW-PB-3 05/09/2017 ZR-95 8.513 No MW-PB-3 05/09/2017 NB-95 5.552 No MW-PB-3 05/09/2017 LA-140 12.72 No MW-PB-3 05/09/2017 C0-58 5.449 No MW-PB-3 05/09/2017 ZN-65 10.33 No MW-PB-3 05/09/2017 SR-89 6.84 No MW-PB-3 05/09/2017 FE-59 10.94 No MW-PB-3 05/09/2017 BA-140 32.4 No MW-PB-3 05/09/2017 GR-A (DIS) 1.07 No MW-PB-3 05/09/2017 GR-B (DIS) 5.83 Yes MW-PB-30 04/27/2016 1-131 12.96 No MW-PB-30 04/27/2016 CS-137 6.016 No MW-PB-30 04/27/2016 SR-90 0.598 No MW-PB-30 04/27/2016 C0-60 6.703 No MW-PB-30 04/27/2016 GR-A (SUS) 2.03 Yes MW-PB-30 04/27/2016 GR-B (SUS) 2.1 Yes MW-PB-30 04/27/2016 K-40 94.2 Yes MW-PB-30 04/27/2016 BE-7 56.09 No MW-PB-30 04/27/2016 U-233/234 0.07663 No MW-PB-30 04/27/2016 MN-54 6.463 No MW-PB-30 04/27/2016 CS-134 6.275 No MW-PB-30 04/27/2016 ZR-95 10.43 No MW-PB-30 04/27/2016 NB-95 7.074 No MW-PB-30 04/27/2016 PU-238 (AS) 0.0466 No MW-PB-30 04/27/2016 LA-140 12.41 No MW-PB-30 04/27/2016 C0-58 5.956 No MW-PB-30 04/27/2016 ZN-65 11.95 No MW-PB-30 04/27/2016 SR-89 6.32 No MW-PB-30 04/27/2016 AM-241 (AS) 0.02519 No MW-PB-30 04/27/2016 FE-59 11.62 No MW-PB-30 04/27/2016 BA-140 34.81 No MW-PB-30 04/27/2016 U-235 (AS) 0.1223 No MW-PB-30 04/27/2016 CM-242 (AS) 0.06569 No MW-PB-30 04/27/2016 U-238 0.07663 No MW-PB-30 04/27/2016 GR-A (DIS) 0.719 No MW-PB-30 04/27/2016 GR-B (DIS) 2.8 Yes MW-PB-30 04/27/2016 CM-243/244 (AS) 0.04646 No MW-PB-30 04/27/2016 PU-239/240 (AS) 0.0807 No MW-PB-30 05/09/2017 1-131 11.82 No GHD 11137316 (1)

TABLE 5.2 Page 31of39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-30 05/09/2017 CS-137 3.403 No MW-PB-30 05/09/2017 SR-90 0.716 No MW-PB-30 05/09/2017 C0-60 3.566 No MW-PB-30 05/09/2017 GR-A (SUS) 0.857 No MW-PB-30 05/09/2017 GR-B (SUS) 1.6 No MW-PB-30 05/09/2017 K-40 81.56 No MW-PB-30 05/09/2017 BE-7 32.81 No MW-PB-30 05/09/2017 MN-54 3.326 No MW-PB-30 05/09/2017 CS-134 3.637 No MW-PB-30 05/09/2017 ZR-95 6.483 No MW-PB-30 05/09/2017 NB-95 3.727 No MW-PB-30 05/09/2017 LA-140 8.361 No MW-PB-30 05/09/2017 C0-58 3.522 No MW-PB-30 05/09/2017 ZN-65 6.363 No MW-PB-30 05/09/2017 SR-89 5.4 No MW-PB-30 05/09/2017 FE-59 7.715 No MW-PB-30 05/09/2017 BA-140 23.4 No MW-PB-30 05/09/2017 GR-A (DIS) 0.624 No MW-PB-30 05/09/2017 GR-B (DIS) 2.35 Yes MW-PB-31 04/27/2016 1-131 11.42 No MW-PB-31 04/27/2016 CS-137 5.349 No MW-PB-31 04/27/2016 SR-90 0.709 No MW-PB-31 04/27/2016 C0-60 4.772 No MW-PB-31 04/27/2016 GR-A (SUS) 0.781 No MW-PB-31 04/27/2016 GR-B (SUS) 1.62 No MW-PB-31 04/27/2016 K-40 46.15 No MW-PB-31 04/27/2016 BE-7 49.83 No MW-PB-31 04/27/2016 U-233/234 0.02296 No MW-PB-31 04/27/2016 MN-54 4.418 No MW-PB-31 04/27/2016 CS-134 4.449 No MW-PB-31 04/27/2016 ZR-95 9.101 No MW-PB-31 04/27/2016 NB-95 6.28 No MW-PB-31 04/27/2016 PU-238 (AS) 0.04071 No MW-PB-31 04/27/2016 LA-140 8.856 No MW-PB-31 04/27/2016 C0-58 5.311 No MW-PB-31 04/27/2016 ZN-65 9.694 No MW-PB-31 04/27/2016 SR-89 6.58 No MW-PB-31 04/27/2016 AM-241 (AS) 0.05669 No MW-PB-31 04/27/2016 FE-59 11.41 No MW-PB-31 04/27/2016 BA-140 27.29 No MW-PB-31 04/27/2016 U-235 (AS) 0.09157 No MW-PB-31 04/27/2016 CM-242 (AS) 0.0174 No MW-PB-31 04/27/2016 U-238 0.02296 No MW-PB-31 04/27/2016 GR-A (DIS) 1.08 No GHD 11137316 (1)

TABLE 5.2 Page 32 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-31 04/27/2016 GR-B (DIS) 2.07 Yes MW-PB-31 04/27/2016 CM-243/244 (AS) 0.08573 No MW-PB-31 04/27/2016 PU-239/240 (AS) 0.08141 No MW-PB-31 05/09/2017 1-131 14.75 No MW-PB-31 05/09/2017 CS-137 3.346 No MW-PB-31 05/09/2017 SR-90 0.662 No MW-PB-31 05/09/2017 C0-60 2.993 No MW-PB-31 05/09/2017 GR-A (SUS) 0.857 No MW-PB-31 05/09/2017 GR-B (SUS) 1.6 No MW-PB-31 05/09/2017 K-40 47.94 No MW-PB-31 05/09/2017 BE-7 34.33 No MW-PB-31 05/09/2017 MN-54 3.114 No MW-PB-31 05/09/2017 CS-134 3.748 No MW-PB-31 05/09/2017 ZR-95 6.343 No MW-PB-31 05/09/2017 NB-95 3.717 No MW-PB-31 05/09/2017 LA-140 7.568 No MW-PB-31 05/09/2017 C0-58 3.522 No MW-PB-31 05/09/2017 ZN-65 7.123 No MW-PB-31 05/09/2017 SR-89 6.12 No MW-PB-31 05/09/2017 FE-59 6.504 No MW-PB-31 05/09/2017 BA-140 27.68 No MW-PB-31 05/09/2017 GR-A (DIS) 0.924 No MW-PB-31 05/09/2017 GR-B (DIS) 2.29 Yes MW-PB-4 04/26/2016 1-131 13.27 No MW-PB-4 04/26/2016 CS-137 8.293 No MW-PB-4 04/26/2016 SR-90 0.601 No MW-PB-4 04/26/2016 C0-60 8.579 No MW-PB-4 04/26/2016 GR-A (SUS) 0.847 No MW-PB-4 04/26/2016 GR-B (SUS) 1.6 No MW-PB-4 04/26/2016 K-40 78.65 No MW-PB-4 04/26/2016 BE-7 69.15 No MW-PB-4 04/26/2016 U-233/234 0.04467 No MW-PB-4 04/26/2016 MN-54 7.434 No MW-PB-4 04/26/2016 CS-134 6.722 No MW-PB-4 04/26/2016 ZR-95 14.41 No MW-PB-4 04/26/2016 NB-95 8.663 No MW-PB-4 04/26/2016 PU-238 (AS) 0.03616 No MW-PB-4 04/26/2016 LA-140 11.37 No MW-PB-4 04/26/2016 Nl-63 4.06 No MW-PB-4 04/26/2016 C0-58 7.616 No MW-PB-4 04/26/2016 ZN-65 16.6 No MW-PB-4 04/26/2016 SR-89 5.99 No MW-PB-4 04/26/2016 AM-241 (AS) 0.01924 No MW-PB-4 04/26/2016 FE-59 13.32 No GHD 11137316 (1)

TABLE 5.2 Page 33 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-4 04/26/2016 FE-55 115.4 No MW-PB-4 04/26/2016 BA-140 33.58 No MW-PB-4 04/26/2016 U-235 (AS) 0.02964 No MW-PB-4 04/26/2016 CM-242 (AS) 0.01905 No MW-PB-4 04/26/2016 U-238 0.07736 No MW-PB-4 04/26/2016 GR-A (DIS) 3.74 No MW-PB-4 04/26/2016 GR-B (DIS) 9.11 Yes MW-PB-4 04/26/2016 CM-243/244 (AS) 0.01905 No MW-PB-4 04/26/2016 PU-239/240 (AS) 0.1347 No MW-PB-4 05/09/2017 1-131 13.54 No MW-PB-4 05/09/2017 CS-137 4.094 No MW-PB-4 05/09/2017 C0-60 4.127 No MW-PB-4 05/09/2017 K-40 79.98 No MW-PB-4 05/09/2017 BE-7 34.23 No MW-PB-4 05/09/2017 MN-54 4.044 No MW-PB-4 05/09/2017 CS-134 4.372 No MW-PB-4 05/09/2017 ZR-95 7.767 No MW-PB-4 05/09/2017 NB-95 4.57 No MW-PB-4 05/09/2017 LA-140 8.028 No MW-PB-4 05/09/2017 C0-58 3.947 No MW-PB-4 05/09/2017 ZN-65 9.272 No MW-PB-4 05/09/2017 FE-59 9.758 No MW-PB-4 05/09/2017 BA-140 30.97 No MW-PB-5 04/25/2016 1-131 12.25 No MW-PB-5 04/25/2016 CS-137 4.632 No MW-PB-5 04/25/2016 C0-60 5.992 No MW-PB-5 04/25/2016 K-40 50.73 No MW-PB-5 04/25/2016 BE-7 43.2 No MW-PB-5 04/25/2016 MN-54 4.983 No MW-PB-5 04/25/2016 CS-134 5.443 No MW-PB-5 04/25/2016 ZR-95 9.653 No MW-PB-5 04/25/2016 NB-95 5.445 No MW-PB-5 04/25/2016 LA-140 11 .12 No MW-PB-5 04/25/2016 C0-58 5.306 No MW-PB-5 04/25/2016 ZN-65 10.93 No MW-PB-5 04/25/2016 FE-59 10.12 No MW-PB-5 04/25/2016 BA-140 30.01 No MW-PB-5 05/10/2017 1-131 12.86 No MW-PB-5 05/10/2017 CS-137 4.661 No MW-PB-5 05/10/2017 C0-60 3.935 No MW-PB-5 05/10/2017 K-40 88.84 No MW-PB-5 05/10/2017 BE-7 37.48 No MW-PB-5 05/10/2017 MN-54 4.03 No MW-PB-5 05/10/2017 CS-134 4.363 No GHD 11137316 (1)

TABLE 5.2 Page 34 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-5 05/10/2017 ZR-95 8.658 No MW-PB-5 05/10/2017 NB-95 4.516 No MW-PB-5 05/10/2017 LA-140 12.57 No MW-PB-5 05/10/2017 C0-58 4.815 No MW-PB-5 05/10/2017 ZN-65 8.382 No MW-PB-5 05/10/2017 FE-59 11.16 No MW-PB-5 05/10/2017 BA-140 31.89 No MW-PB-6 04/25/2016 1-131 13.9 No MW-PB-6 04/25/2016 CS-137 7.084 No MW-PB-6 04/25/2016 C0-60 6.064 No MW-PB-6 04/25/2016 K-40 68.41 No MW-PB-6 04/25/2016 BE-7 54.97 No MW-PB-6 04/25/2016 MN-54 5.305 No MW-PB-6 04/25/2016 CS-134 5.628 No MW-PB-6 04/25/2016 ZR-95 12.21 No MW-PB-6 04/25/2016 NB-95 7.178 No MW-PB-6 04/25/2016 LA-140 12.31 No MW-PB-6 04/25/2016 C0-58 6.587 No MW-PB-6 04/25/2016 ZN-65 12.19 No MW-PB-6 04/25/2016 FE-59 12.94 No MW-PB-6 04/25/2016 BA-140 31.42 No MW-PB-6 05/10/2017 1-131 14.74 No MW-PB-6 05/10/2017 CS-137 4.737 No MW-PB-6 05/10/2017 C0-60 4.308 No MW-PB-6 05/10/2017 K-40 111.5 No MW-PB-6 05/10/2017 BE-7 40.19 No MW-PB-6 05/10/2017 MN-54 4.132 No MW-PB-6 05/10/2017 CS-134 4.563 No MW-PB-6 05/10/2017 ZR-95 8.993 No MW-PB-6 05/10/2017 NB-95 4.528 No MW-PB-6 05/10/2017 LA-140 11.67 No MW-PB-6 05/10/2017 C0-58 4.205 No MW-PB-6 05/10/2017 ZN-65 10.77 No MW-PB-6 05/10/2017 FE-59 9.706 No MW-PB-6 05/10/2017 BA-140 31.92 No MW-PB-7 04/25/2016 1-131 9.198 No MW-PB-7 04/25/2016 CS-137 3.171 No MW-PB-7 04/25/2016 SR-90 0.385 No MW-PB-7 04/25/2016 C0-60 3.551 No MW-PB-7 04/25/2016 GR-A (SUS) 0.804 No MW-PB-7 04/25/2016 GR-B (SUS) 1.64 No MW-PB-7 04/25/2016 K-40 65.96 No MW-PB-7 04/25/2016 BE-7 29.71 No MW-PB-7 04/25/2016 U-233/234 0.04697 No GHD 11137316 {1)

TABLE 5.2 Page 35 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-7 04/25/2016 MN-54 3.466 No MW-PB-7 04/25/2016 CS-134 3.311 No MW-PB-7 04/25/2016 ZR-95 6.268 No MW-PB-7 04/25/2016 NB-95 3.599 No MW-PB-7 04/25/2016 PU-238 (AS) 0.03611 No MW-PB-7 04/25/2016 LA-140 6.637 No MW-PB-7 04/25/2016 C0-58 3.239 No MW-PB-7 04/25/2016 ZN-65 6.361 No MW-PB-7 04/25/2016 SR-89 4.4 No MW-PB-7 04/25/2016 AM-241 (AS) 0.3208 No MW-PB-7 04/25/2016 FE-59 7.345 No MW-PB-7 04/25/2016 BA-140 19.44 No MW-PB-7 04/25/2016 U-235 (AS) 0.1161 No MW-PB-7 04/25/2016 CM-242 (AS) 0.09846 No MW-PB-7 04/25/2016 U-238 0.02521 N*o MW-PB-7 04/25/2016 GR-A (DIS) 2.23 No MW-PB-7 04/25/2016 GR-B (DIS) 10 Yes MW-PB-7 04/25/2016 CM-243/244 (AS) 0.09846 No MW-PB-7 04/25/2016 PU-239/240 (AS) 0.1779 No MW-PB-7 04/25/2016 1-131 11.83 No MW-PB-7 04/25/2016 CS-137 4.739 No MW-PB-7 04/25/2016 SR-90 0.614 No MW-PB-7 04/25/2016 C0-60 6.118 No MW-PB-7 04/25/2016 GR-A (SUS) 0.843 No MW-PB-7 04/25/2016 GR-B (SUS) 1.6 No MW-PB-7 04/25/2016 K-40 73.46 No MW-PB-7 04/25/2016 BE-7 40.88 No MW-PB-7 04/25/2016 U-233/234 0.05802 No MW-PB-7 04/25/2016 MN-54 4.779 No MW-PB-7 04/25/2016 CS-134 4.25 No MW-PB-7 04/25/2016 ZR-95 9.213 No MW-PB-7 04/25/2016 NB-95 5.662 No MW-PB-7 04/25/2016 PU-238 (AS) 0.06855 No MW-PB-7 04/25/2016 LA-140 10.8 No MW-PB-7 04/25/2016 C0-58 4.744 No MW-PB-7 04/25/2016 ZN-65 11.15 No MW-PB-7 04/25/2016 SR-89 7.85 No MW-PB-7 04/25/2016 AM-241 (AS) 0.1557 No MW-PB-7 04/25/2016 FE-59 9.912 No MW-PB-7 04/25/2016 BA-140 26.66 No MW-PB-7 04/25/2016 U-235 (AS) 0.07172 No MW-PB-7 04/25/2016 CM-242 (AS) 0.02618 No MW-PB-7 04/25/2016 U-238 0.1535 No MW-PB-7 04/25/2016 GR-A (DIS) 2.29 No GHD 11137316 (1)

TABLE 5.2 Page 36 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-7 04/25/2016 GR-B (DIS) 10.9 Yes MW-PB-7 04/25/2016 CM-243/244 (AS) 0.1463 No MW-PB-7 04/25/2016 PU-239/240 (AS) 0.06855 No MW-PB-7 05/10/2017 1-131 11.62 No MW-PB-7 05/10/2017 CS-137 3.516 No MW-PB-7 05/10/2017 SR-90 0.456 No MW-PB-7 05/10/2017 C0-60 3.796 No MW-PB-7 05/10/2017 GR-A (SUS) 0.804 No MW-PB-7 05/10/2017 GR-B (SUS) 1.44 No MW-PB-7 05/10/2017 K-40 81.43 No MW-PB-7 05/10/2017 BE-7 32.73 No MW-PB-7 05/10/2017 MN-54 3.657 No MW-PB-7 05/10/2017 CS-134 4.093 No MW-PB-7 05/10/2017 ZR-95 6.359 No MW-PB-7 05/10/2017 NB-95 3.786 No MW-PB-7 05/10/2017 LA-140 8.461 No MW-PB-7 05/10/2017 C0-58 3.782 No MW-PB-7 05/10/2017 ZN-65 7.611 No MW-PB-7 05/10/2017 SR-89 4.33 No MW-PB-7 05/10/2017 FE-59 8.524 No MW-PB-7 05/10/2017 BA-140 24.5 No MW-PB-7 05/10/2017 GR-A (DIS) 1.51 No MW-PB-7 05/10/2017 GR-B (DIS) 7.46 Yes MW-PB-7 05/10/2017 1-131 14.02 No MW-PB-7 05/10/2017 CS-137 4.654 No MW-PB-7 05/10/2017 C0-60 4.241 No MW-PB-7 05/10/2017 GR-A (SUS) 0.804 No MW-PB-7 05/10/2017 GR-B (SUS) 1.44 No MW-PB-7 05/10/2017 K-40 39.93 No MW-PB-7 05/10/2017 BE-7 42.92 No MW-PB-7 05/10/2017 MN-54 4.758 No MW-PB-7 05/10/2017 CS-134 4.387 No MW-PB-7 05/10/2017 ZR-95 9.071 No MW-PB-7 05/10/2017 NB-95 4.186 No MW-PB-7 05/10/2017 LA-140 11.71 No MW-PB-7 05/10/2017 C0-58 4.914 No MW-PB-7 05/10/2017 ZN-65 9.176 No MW-PB-7 05/10/2017 FE-59 9.996 No MW-PB-7 05/10/2017 BA-140 32.24 No MW-PB-7 05/10/2017 GR-A (DIS) 1.48 No MW-PB-7 05/10/2017 GR-B (DIS) 7.33 Yes MW-PB-7 05/10/2017 SR-90 0.826 No MW-PB-7 05/10/2017 SR-89 8.19 No MW-PB-8 02/03/2016 1-131 11 .89 No GHD 11137316 (1)

TABLE 5.2 Page 37 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-8 02/03/2016 CS-137 4.456 No MW-PB-8 02/03/2016 C0-60 6.645 No MW-PB-8 02/03/2016 K-40 101.2 No MW-PB-8 02/03/2016 BE-7 55.84 No MW-PB-8 02/03/2016 MN-54 5.251 No MW-PB-8 02/03/2016 CS-134 6.235 No MW-PB-8 02/03/2016 ZR-95 14.58 No MW-PB-8 02/03/2016 NB-95 5.81 No MW-PB-8 02/03/2016 LA-140 14.78 No MW-PB-8 02/03/2016 C0-58 5.547 No MW-PB-8 02/03/2016 ZN-65 13.83 No MW-PB-8 02/03/2016 FE-59 10.31 No MW-PB-8 02/03/2016 BA-140 32.85 No MW-PB-8 04/26/2016 1-131 12.32 No MW-PB-8 04/26/2016 CS-137 6.131 No MW-PB-8 04/26/2016 SR-90 0.427 No MW-PB-8 04/26/2016 C0-60 5.572 No MW-PB-8 04/26/2016 GR-A (SUS) 1.93 Yes MW-PB-8 04/26/2016 GR-B (SUS) 1.57 No MW-PB-8 04/26/2016 K-40 102.5 No MW-PB-8 04/26/2016 BE-7 57.44 No MW-PB-8 04/26/2016 U-233/234 0.0621 No MW-PB-8 04/26/2016 MN-54 5.484 No MW-PB-8 04/26/2016 CS-134 5.827 No MW-PB-8 04/26/2016 ZR-95 8.981 No MW-PB-8 04/26/2016 NB-95 6.538 No MW-PB-8 04/26/2016 PU-238 (AS) 0.04757 No MW-PB-8 04/26/2016 LA-140 11.41 No MW-PB-8 04/26/2016 C0-58 5.552 No MW-PB-8 04/26/2016 ZN-65 11.9 No MW-PB-8 04/26/2016 SR-89 9.35 No MW-PB-8 04/26/2016 AM-241 (AS) 0.1371 No MW-PB-8 04/26/2016 FE-59 11.93 No MW-PB-8 04/26/2016 BA-140 39.68 No MW-PB-8 04/26/2016 U-235 (AS) 0.07676 No MW-PB-8 04/26/2016 CM-242 (AS) 0.05132 No MW-PB-8 04/26/2016 U-238 0.0621 No MW-PB-8 04/26/2016 GR-A (DIS} 2.31 No MW-PB-8 04/26/2016 GR-B (DIS} 23.5 Yes MW-PB-8 04/26/2016 CM-243/244 (AS} 0.1203 No MW-PB-8 04/26/2016 PU-239/240 (AS) 0.06727 No MW-PB-8 07/25/2016 1-131 12.92 No MW-PB-8 07/25/2016 CS-137 4.261 No MW-PB-8 07/25/2016 C0-60 3.778 No GHD 11137316 (1)

TABLE 5.2 Page 38 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-8 07/25/2016 K-40 40.7 No MW-PB-8 07/25/2016 BE-7 35.81 No MW-PB-8 07/25/2016 MN-54 3.649 No MW-PB-8 07/25/2016 CS-134 3.478 No MW-PB-8 07/25/2016 ZR-95 7.631 No MW-PB-8 07/25/2016 NB-95 4.134 No MW-PB-8 07/25/2016 LA-140 7.537 No MW-PB-8 07/25/2016 C0-58 3.138 No MW-PB-8 07/25/2016 ZN-65 7.264 No MW-PB-8 07/25/2016 FE-59 9.891 No MW-PB-8 07/25/2016 BA-140 26.61 No MW-PB-8 10/12/2016 1-131 13.43 No MW-PB-8 10/12/2016 CS-137 8.848 No MW-PB-8 10/12/2016 C0-60 7.484 No MW-PB-8 10/12/2016 K-40 143.7 No MW-PB-8 10/12/2016 BE-7 76.36 No MW-PB-8 10/12/2016 MN-54 8.655 No MW-PB-8 10/12/2016 CS-134 8.773 No MW-PB-8 10/12/2016 ZR-95 15.61 No MW-PB-8 10/12/2016 NB-95 11.47 No MW-PB-8 10/12/2016 LA-140 13.71 No MW-PB-8 10/12/2016 C0-58 8.913 No MW-PB-8 10/12/2016 ZN-65 17.75 No MW-PB-8 10/12/2016 TH-228 17.78 Yes MW-PB-8 10/12/2016 FE-59 16.46 No MW-PB-8 10/12/2016 BA-140 36 No MW-PB-8 01/19/2017 1-131 14.9 No MW-PB-8 01/19/2017 CS-137 4.965 No MW-PB-8 01/19/2017 C0-60 5.466 No MW-PB-8 01/19/2017 K-40 40.73 No MW-PB-8 01/19/2017 BE-7 43.69 No MW-PB-8 01/19/2017 MN-54 4.754 No MW-PB-8 01/19/2017 CS-134 5.064 No MW-PB-8 01/19/2017 ZR-95 7.787 No MW-PB-8 01/19/2017 NB-95 6.288 No MW-PB-8 01/19/2017 LA-140 11 .34 No MW-PB-8 01/19/2017 C0-58 5.033 No MW-PB-8 01/19/2017 ZN-65 11.43 No MW-PB-8 01/19/2017 FE-59 11 .28 No MW-PB-8 01/19/2017 BA-140 30.77 No MW-PB-8 05/10/2017 1-131 14.77 No MW-PB-8 05/10/2017 CS-137 4.328 No MW-PB-8 05/10/2017 SR-90 0.482 No MW-PB-8 05/10/2017 C0-60 3.411 No GHD 11137316 (1)

TABLE 5.2 Page 39 of 39 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN GROUNDWATER PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA MW-PB-8 05/10/2017 GR-A (SUS) 0.796 No MW-PB-8 05/10/2017 GR-B (SUS) 1.43 No MW-PB-8 05/10/2017 K-40 40.69 No MW-PB-8 05/10/2017 BE-7 41.47 No MW-PB-8 05/10/2017 MN-54 4.173 No MW-PB-8 05/10/2017 CS-134 3.955 No MW-PB-8 05/10/2017 ZR-95 7.677 No MW-PB-8 05/10/2017 NB-95 4.815 No MW-PB-8 05/10/2017 LA-140 8.475 No MW-PB-8 05/10/2017 C0-58 5.097 No MW-PB-8 05/10/2017 ZN-65 8.446 No MW-PB-8 05/10/2017 SR-89 5.47 No MW-PB-8 05/10/2017 FE-59 8.783 No MW-PB-8 05/10/2017 BA-140 28.68 No MW-PB-8 05/10/2017 GR-A (DIS) 1.71 No MW-PB-8 05/10/2017 GR-B (DIS) 15.4 Yes MW-PB-8 08/15/2017 1-131 13.62 No MW-PB-8 08/15/2017 CS-137 2.098 No MW-PB-8 08/15/2017 C0-60 2.07 No MW-PB-8 08/15/2017 K-40 45 No MW-PB-8 08/15/2017 BE-7 22.27 No MW-PB-8 08/15/2017 MN-54 2.095 No MW-PB-8 08/15/2017 CS-134 2.072 No MW-PB-8 08/15/2017 ZR-95 4.215 No MW-PB-8 08/15/2017 NB-95 2.43 No MW-PB-8 08/15/2017 LA-140 6.854 No MW-PB-8 08/15/2017 C0-58 2.333 No MW-PB-8 08/15/2017 ZN-65 4.316 No MW-PB-8 08/15/2017 FE-59 5.224 No MW-PB-8 08/15/2017 BA-140 23.9 No Notes:

pCi/L - picocuries per liter GHD 11137316 (1)

TABLE 5.3 Page 1of2 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN SURFACEWATER AND SEEPS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Report Result Location ID Sample Date Detected (pCi/L)

SP-PB-1 02/02/2016 179 No SP-PB-1 04/25/2016 178 No SP-PB-1 07/25/2016 165 No SP-PB-1 10/11/2016 180 No SP-PB-1 01/18/2017 190 No SP-PB-2 02/02/2016 196 No SP-PB-2 04/25/2016 178 No SP-PB-2 07/26/2016 164 No SP-PB-2 10/11/2016 180 No SP-PB-2 01/18/2017 191 No SP-PB-2 02/17/2017 181 No SP-PB-3 02/02/2016 180 No SP-PB-3 04/26/2016 178 No SP-PB-3 07/25/2016 164 No SP-PB-3 03/27/2017 188 No SW-PB-1 02/01/2016 191 No SW-PB-1 02/02/2016 191 No SW-PB-1 04/26/2016 176 No SW-PB-1 07/27/2016 162 No SW-PB-1 10/11/2016 184 No SW-PB-1 10/11/2016 181 No SW-PB-1 01/19/2017 188 No SW-PB-5 02/01/2016 193 No SW-PB-5 04/26/2016 180 No SW-PB-5 07/27/2016 161 No SW-PB-5 10/11/2016 183 No SW-PB-5 01/19/2017 191 No SW-PB-6 02/01/2016 193 No SW-PB-6 04/26/2016 180 No SW-PB-6 04/26/2016 179 No SW-PB-6 07/27/2016 162 No SW-PB-6 07/27/2016 165 No SW-PB-6 10/11/2016 181 No SW-PB-6 01/18/2017 188 No SW-PB-6 01/18/2017 194 No SP-PB-1 05/09/2017 186 No SP-PB-1 08/14/2017 172 No SP-PB-2 05/09/2017 185 No SP-PB-2 08/14/2017 168 No SP-PB-3 05/09/2017 183 No SP-PB-3 09/11/2017 186 No SW-PB-1 05/10/2017 187 No GHD 11137316 (1)

TABLE 5.3 Page 2 of 2 ANALYTICAL RESULTS

SUMMARY

-TRITIUM IN SURFACEWATER AND SEEPS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Report Result Location ID Sample Date Detected (pCi/L)

SW-PB-1 08/16/2017 171 No SW-PB-5 05/10/2017 185 No SW-PB-5 08/15/2017 172 No SW-PB-6 05/10/2017 185 No SW-PB-6 08/15/2017 170 No Notes:

pCi/L - picocuries per liter GHD 11137316 (1)

TABLE 5.4 Page 1of5 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN SURFACE WATER AND SEEPS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Report Result Location ID Sample Date Parameter Name Detected (pCi/L)

SP-PB-1 04/25/2016 1-131 10.78 No SP-PB-1 04/25/2016 CS-137 4.053 No SP-PB-1 04/25/2016 C0-60 3.481 No SP-PB-1 04/25/2016 K-40 47.6 No SP-PB-1 04/25/2016 BE-7 37.04 No SP-PB-1 04/25/2016 MN-54 3.46 No SP-PB-1 04/25/2016 CS-134 3.296 No SP-PB-1 04/25/2016 ZR-95 7.308 No SP-PB-1 04/25/2016 NB-95 4.06 No SP-PB-1 04/25/2016 LA-140 5.298 No SP-PB-1 04/25/2016 C0-58 3.9 No SP-PB-1 04/25/2016 ZN-65 6.493 No SP-PB-1 04/25/2016 FE-59 7.533 No SP-PB-1 04/25/2016 BA-140 27 No SP-PB-1 05/09/2017 1-131 10.95 No SP-PB-1 05/09/2017 CS-137 2.858 No SP-PB-1 05/09/2017 C0-60 2.787 No SP-PB-1 05/09/2017 K-40 71.69 Yes SP-PB-1 05/09/2017 BE-7 28.32 No SP-PB-1 05/09/2017 MN-54 2.622 No SP-PB-1 05/09/2017 CS-134 2.825 No SP-PB-1 05/09/2017 ZR-95 5.151 No SP-PB-1 05/09/2017 NB-95 2.964 No SP-PB-1 05/09/2017 LA-140 6.368 No SP-PB-1 05/09/2017 C0-58 2.988 No SP-PB-1 05/09/2017 ZN-65 5.601 No SP-PB-1 05/09/2017 TH-228 10.05 Yes SP-PB-1 05/09/2017 FE-59 6 .28 No SP-PB-1 05/09/2017 BA-140 21.33 No SP-PB-2 04/25/2016 1-131 11 .84 No SP-PB-2 04/25/2016 CS-137 5.587 No SP-PB-2 04/25/2016 C0-60 3.997 No SP-PB-2 04/25/2016 K-40 102.9 Yes SP-PB-2 04/25/2016 BE-7 50.24 No SP-PB-2 04/25/2016 MN-54 4.424 No SP-PB-2 04/25/2016 CS-134 4.915 No SP-PB-2 04/25/2016 ZR-95 8.523 No SP-PB-2 04/25/2016 NB-95 5.481 No SP-PB-2 04/25/2016 LA-140 9.42 No SP-PB-2 04/25/2016 C0-58 4.941 No SP-PB-2 04/25/2016 ZN-65 9.665 No SP-PB-2 04/25/2016 TH-228 18.74 Yes GHD 11137316 (1)

TABLE 5.4 Page 2 of 5 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN SURFACE WATER AND SEEPS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Report Result Location ID Sample Date Parameter Name Detected (pCi/L)

SP-PB-2 04/25/2016 AC-228 38.88 Yes SP-PB-2 04/25/2016 FE-59 9.826 No SP-PB-2 04/25/2016 BA-140 28.83 No SP-PB-2 05/09/2017 1-131 12.77 No SP-PB-2 05/09/2017 CS-137 4.875 No SP-PB-2 05/09/2017 C0-60 4.079 No SP-PB-2 05/09/2017 K-40 113.1 Yes SP-PB-2 05/09/2017 BE-7 39.64 No SP-PB-2 05/09/2017 MN-54 4.175 No SP-PB-2 05/09/2017 CS-134 4.604 No SP-PB-2 05/09/2017 ZR-95 7.326 No SP-PB-2 05/09/2017 NB-95 4.507 No SP-PB-2 05/09/2017 LA-140 9.494 No SP-PB-2 05/09/2017 C0-58 4.19 No SP-PB-2 05/09/2017 ZN-65 6.976 No SP-PB-2 05/09/2017 FE-59 9.794 No SP-PB-2 05/09/2017 BA-140 29.97 No SP-PB-3 04/26/2016 1-131 11.9 No SP-PB-3 04/26/2016 CS-137 5.352 No SP-PB-3 04/26/2016 C0-60 5.28 No SP-PB-3 04/26/2016 K-40 40.92 No SP-PB-3 04/26/2016 BE-7 43.54 No SP-PB-3 04/26/2016 MN-54 4.281 No SP-PB-3 04/26/2016 CS-134 4.374 No SP-PB-3 04/26/2016 ZR-95 8.605 No SP-PB-3 04/26/2016 NB-95 5.323 No SP-PB-3 04/26/2016 LA-140 8.451 No SP-PB-3 04/26/2016 C0-58 5.353 No SP-PB-3 04/26/2016 ZN-65 10.54 No SP-PB-3 04/26/2016 FE-59 9.057 No SP-PB-3 04/26/2016 BA-140 26.72 No SP-PB-3 05/09/2017 1-131 13.55 No SP-PB-3 05/09/2017 CS-137 3.852 No SP-PB-3 05/09/2017 C0-60 4.253 No SP-PB-3 05/09/2017 K-40 43.49 No SP-PB-3 05/09/2017 BE-7 38.1 No SP-PB-3 05/09/2017 MN-54 4.342 No SP-PB-3 05/09/2017 CS-134 4.177 No SP-PB-3 05/09/2017 ZR-95 7.869 No SP-PB-3 05/09/2017 NB-95 4.942 No SP-PB-3 05/09/2017 LA-140 9.286 No SP-PB-3 05/09/2017 C0-58 3.939 No GHD 11137316 (1)

TABLE 5.4 Page 3 of 5 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN SURFACE WATER AND SEEPS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Location ID Report Result Sample Date Parameter Name Detected (pCl/L)

SP-PB-3 05/09/2017 ZN-65 8.959 No SP-PB-3 05/09/2017 FE-59 9.627 No SP-PB-3 05/09/2017 BA-140 29.55 No SW-PB-1 04/26/2016 1-131 7.695 No SW-PB-1 04/26/2016 CS-137 2.937 No SW-PB-1 04/26/2016 C0-60 2.384 No SW-PB-1 04/26/2016 K-40 45.62 No SW-PB-1 04/26/2016 BE-7 28.24 No SW-PB-1 04/26/2016 MN-54 2.645 No SW-PB-1 04/26/2016 CS-134 2.628 No SW-PB-1 04/26/2016 ZR-95 5.213 No SW-PB-1 04/26/2016 NB-95 3.105 No SW-PB-1 04/26/2016 LA-140 4 .269 No SW-PB-1 04/26/2016 C0-58 2.664 No SW-PB-1 04/26/2016 ZN-65 5.323 No SW-PB-1 04/26/2016 FE-59 5.32 No SW-PB-1 04/26/2016 BA-140 18.45 No SW-PB-1 05/10/2017 1-131 12.63 No SW-PB-1 05/10/2017 CS-137 4.749 No SW-PB-1 05/10/2017 C0-60 4.679 No SW-PB-1 05/10/2017 K-40 41.74 No SW-PB-1 05/10/2017 BE-7 41.27 No SW-PB-1 05/10/2017 MN-54 4.013 No SW-PB-1 05/10/2017 CS-134 4.328 No SW-PB-1 05/10/2017 ZR-95 8.149 No SW-PB-1 05/10/2017 NB-95 5.075 No SW-PB-1 05/10/2017 LA-140 10.19 No SW-PB-1 05/10/2017 C0-58 4.033 No SW-PB-1 05/10/2017 ZN-65 8.31 No SW-PB-1 05/10/2017 FE-59 9.337 No SW-PB-1 05/10/2017 BA-140 26.33 No SW-PB-5 04/26/2016 1-131 7.378 No SW-PB-5 04/26/2016 CS-137 3.355 No SW-PB-5 04/26/2016 C0-60 4.31 No SW-PB-5 04/26/2016 K-40 54.73 No SW-PB-5 04/26/2016 BE-7 28.33 No SW-PB-5 04/26/2016 MN-54 2.517 No SW-PB-5 04/26/2016 CS-134 3.144 No SW-PB-5 04/26/2016 ZR-95 5.915 No SW-PB-5 04/26/2016 NB-95 3.141 No SW-PB-5 04/26/2016 LA-140 4.823 No SW-PB-5 04/26/2016 C0-58 3.03 No GHD 11137316 (1)

TABLE 5.4 Page 4 of 5 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN SURFACE WATER AND SEEPS PEACH BOTIOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Location ID Report Result Sample Date Parameter Name Detected (pCi/L)

SW-PB-5 04/26/2016 ZN-65 6.426 No SW-PB-5 04/26/2016 FE-59 7.074 No SW-PB-5 04/26/2016 BA-140 16.83 No SW-PB-5 05/10/2017 1-131 11.98 No SW-PB-5 05/10/2017 CS-137 3.361 No SW-PB-5 05/10/2017 C0-60 3.71 No SW-PB-5 05/10/2017 K-40 65.28 No SW-PB-5 05/10/2017 BE-7 33.82 No SW-PB-5 05/10/2017 MN-54 3.035 No SW-PB-5 05/10/2017 CS-134 4.096 No SW-PB-5 05/10/2017 ZR-95 7.099 No SW-PB-5 05/10/2017 NB-95 4.136 No SW-PB-5 05/10/2017 LA-140 6.897 No SW-PB-5 05/10/2017 C0-58 3.783 No SW-PB-5 05/10/2017 ZN-65 7.058 No SW-PB-5 05/10/2017 FE-59 7.24 No SW-PB-5 05/10/2017 BA-140 24.93 No SW-PB-6 04/26/2016 1-131 9.468 No SW-PB-6 04/26/2016 CS-137 3.882 No SW-PB-6 04/26/2016 C0-60 3.807 No SW-PB-6 04/26/2016 K-40 82.66 No SW-PB-6 04/26/2016 BE-7 36.56 No SW-PB-6 04/26/2016 MN-54 3.87 No SW-PB-6 04/26/2016 CS-134 3.418 No SW-PB-6 04/26/2016 ZR-95 6.523 No SW-PB-6 04/26/2016 NB-95 4.047 No SW-PB-6 04/26/2016 LA-140 7.984 No SW-PB-6 04/26/2016 C0-58 3.431 No SW-PB-6 04/26/2016 ZN-65 7.847 No SW-PB-6 04/26/2016 FE-59 9.269 No SW-PB-6 04/26/2016 BA-140 23.79 No SW-PB-6 04/26/2016 1-131 7.903 No SW-PB-6 04/26/2016 CS-137 3.743 No SW-PB-6 04/26/2016 C0-60 3.773 No SW-PB-6 04/26/2016 K-40 57.57 No SW-PB-6 04/26/2016 BE-7 30.99 No SW-PB-6 04/26/2016 MN-54 3.228 No SW-PB-6 04/26/2016 CS-134 3.42 No SW-PB-6 04/26/2016 ZR-95 6.267 No SW-PB-6 04/26/2016 NB-95 3.848 No SW-PB-6 04/26/2016 LA-140 5.479 No SW-PB-6 04/26/2016 C0-58 3.862 No GHD 11137316 (1)

TABLE 5.4 Page 5 of 5 ANALYTICAL RESULTS

SUMMARY

- OTHER RADIONUCLIDES IN SURFACE WATER AND SEEPS PEACH BOTTOM ATOMIC POWER STATION DELTA, PENNSYLVANIA Report Result Location ID Sample Date Parameter Name Detected (pCi/L)

SW-PB-6 04/26/2016 ZN-65 6.851 No SW-PB-6 04/26/2016 FE-59 8.646 No SW-PB-6 04/26/2016 BA-140 20.77 No SW-PB-6 05/10/2017 1-131 12.67 No SW-PB-6 05/10/2017 CS-137 5.122 No SW-PB-6 05/10/2017 C0-60 5.488 No SW-PB-6 05/10/2017 K-40 88.26 No SW-PB-6 05/10/2017 BE-7 40.87 No SW-PB-6 05/10/2017 MN-54 4.398 No SW-PB-6 05/10/2017 CS-134 5.298 No SW-PB-6 05/10/2017 ZR-95 8.698 No SW-PB-6 05/10/2017 NB-95 4.976 No SW-PB-6 05/10/2017 LA-140 12.11 No SW-PB-6 05/10/2017 C0-58 4.413 No SW-PB-6 05/10/2017 ZN-65 8.79 No SW-PB-6 05/10/2017 FE-59 11.34 No SW-PB-6 05/10/2017 BA-140 32.4 No Notes:

pCi/L - picocuries per liter GHD 11137316 (1)

GHD I Hydrogeologic Investigation Report 111137316 (1)

Attachments to Questions 4.1 and 4.3 OMITTED GHD I Hydrogeologic Investigation Report 111137316 (1)

2017 Exelon HIR Updates Questionnaire

1. Hydrogeologic Investigation Report Information Request 1.1 Have there been additional hydrogeologic studies completed at the Station including those in response to spills, assessment of RGPP trends, precipitation and atmospheric deposition studies, agency or NRC request, or other studies?

Examples may include focused studies surrounding a buried pipe leak that was repaired and the reporting to the State EPA agency, or additional monitoring wells installed to determine the reason for increases in tritium levels at an RGPP well.

Please provide either a brief description, or reference specific documents that contain the information.

No additional hydrogeologic studies have been performed.

1.2 Has a routine or continuous groundwater sampling program been established outside the requirements of the Station's RGPP process.

Examples may include the more frequent sampling of a subset of the RGPP wells, or other routine sampling of wells installed around a buried pipe leak with a regulatory required sample frequency Please provide either a brief description, or reference specific documents that contain the information.

1

We currently have 2 samplings in progress outside of the requirements of the RGPP.

1. MW-PB-25 showed an increase in activity in February 2017. We have been sampling wells MW-PB-24 to 27 on an increased frequency. There is no evidence of a leak in the U3 M/S as inspected remotely via cameras.

PBAPS Well MW-PB-24 MW-PB-25 MW-PB-26 MW-PB-27 No./Location/well NE of U/3 NE of U/3 NE of U/3 NE of U/3 depth Turbine Turbine Turbine Turbine Building Building Building Building (pCi/L) (pCi/L) (pCi/L) (pCi/L) 8 ft 6.5 ft 20.5 ft 46 ft 9/20/2016 260 8,880 191 1, 120 9/27/2016 539 4,240 <MDC 621 10/10/2016 362 5,930 208 1,270 11/14/2016 382 9,010 227 712 11/30/2016 246 5, 150 345 892 1/18/2017 260 8,540 239 816 2/2/2017 No Sample 5,400 No Sample No Sample 2/17/2017 257 16,300 No Samole No Sample 2/21/2017 355 10,800 <MDC 476 2/27/2017 298 17,600 245 533 3/6/2017 650 10,900 252 482 3/13/2017 735 13,500 256 563 2

2. The Unit 3 yard drain showed activity of up to 1,020 pCi/L from a sample obtained during the pt quarter sampling 2017. The U3 CST moat was identified as degraded, an IR was generated and the moat has been sealed.

Date Unit 3 Yard Drain Tritium Activity 2/16/2017 1,020 2/21/2017 631 2/27/2017 731 3/6/2017 516 3/13/2017 564 U3 CST moat post cleaning and sealing IR3975434 3

1.3 Have additional groundwater and surface water monitoring points been established at the Station since the last hydrogeologic investigation or report update?

Examples may include permanent monitoring wells installed to fill data gaps in the RGPP sampling programs or temporary monitoring wells used to evaluate groundwater prior to excavation and dewatering.

Please provide either a brief description, or reference specific documents that contain the information.

No additional monitoring points have been established.

1.4 Are there or have there been trends in the routine RGPP data (over a minimum of three sample events) that are being watched closely.

Examples may be the increasing concentrations of tritium in a property line monitoring well over the last three quarters, or the significant reduction in tritium in the area of former buried pipe leaks.

Please provide either a brief description, or reference specific documents that contain the information.

Yes, reference section 1.2.

2. Subsurface Disturbances/Construction since May 2012 or since last hydrogeological udpate 2.1 Has there been any major subsurface construction (e.g., buildings, below ground barriers, or structures built into the groundwater table)?

Examples may include the construction of a series of sheet piling walls near the intake structure, or the construction of a below grade valve pit with a sump pump.

Please provide either a brief description, or reference specific documents that contain the information.

Yes. There have been 2 structures built that have disturbed the subsurface.

1. Unit 3 Adjustable Speed Drive (ASD) building. The Unit 3 ASD building is located west of the Torus Dewatering Tank and Unit 3 Condensate Storage Tanks moats. The ASD 4

building houses components that regulate plant pump speed. The subsurface was disturbed to a depth of about 4' to permit the installation of the building foundation and associated electrical cable runs.

2. FLEX Building - The FLEX building is located southwest of the Owner Controlled Area checkpoint. The building houses emergency response equipment including diesel fueled pumps, generators, tractors and miscellaneous support equipment. The building is outside of the protected area and not near any systems, structures or components (SSC) that contain licensed material.

2.2 Have there been other hydrogeologic studies or geotechnical assessments completed at the Station related to engineering evaluations?

Examples may include there drilling and logging of holes for the study of a new foundation, or drilling of dewatering wells for the installation of a new buried piping conduit, or the installation of deep cathodic protection borings.

Please provide either a brief description, or reference specific documents that contain the information.

No.

2.3 Has natural or man-made erosion occurred at the station such as sink holes and water main breaks and subsequent wash outs?

Examples may include the discovery of a natural sink hole adjacent to a Station structure or the wash out of subsurface soils during the failure of fire water line or other subsurface water pipe.

Please provide either a brief description, or reference specific documents that contain the information.

No.

5

3. On-Station Property or Off-Site Groundwater Supply changes since May 2012 or last hydrogeological update 3.1 Have there been additional studies completed at the Station related to water supply evaluations on and off the Station Property?

Examples may include those related to developing additional or alternate supplies of groundwater and surface water, or studies performed by the Station to evaluate increasing water flow rates from surface water bodies or on-site extraction wells.

Please provide either a brief description, or reference specific documents that contain the information.

No.

3.2 Has the station performed a water well inventory search since May 2012 or last hydrogeological update?

Examples may include those required by the State regulatory agency, or those performed during an update of the UFSAR, or those performed during the purchase of new property near the Station.

Please provide either a brief description, or reference specific documents that contain the information.

No.

3.3 Has groundwater use on the station property changed (i.e., new water supply wells, or old wells abandoned)?

Examples may include the drilling and installation of a new water supply well to provide potable water or the abandonment of a former fire protection water supply well.

Please provide either a brief description, or reference specific documents that contain the information.

No.

6

3.4 Have there been new developments off the station property that would have included the installation and operation of water supply wells (residential or commercial)?

Examples may include the development of previously undeveloped farm land near the Station with construction of private homes and private water supply wells, or the drilling and operation of a new municipal water supply well within a mile radius of the Station.

Please provide either a brief description, or reference specific documents that contain the information.

No.

3.5 Has the Station's licensed property boundary been revised or has the station sold or purchased additional lands?

Please provide either a brief description, or reference specific documents that contain the information.

No.

4. Spills or Leaks Reported to Agencies Documented since May 2012 or last hydrogeological update 4.1 Have leaks of liquid radwaste, tritiated waters or other spills to the soils occurred which have required reporting to a State of federal agency other than the NRC?

Examples may include the discovery of a buried piping leak during pipe inspections and the reporting of this leak to the State EPA, or discovery of tritium impacted groundwater which eventually point to a release from a subsurface structure and the calculated number of curies required reporting to the State EPA.

Please provide either a brief description, or reference specific documents that contain the information.

Yes. A leak in the Unit 3 Moisture Separator area 116' in April 2015 resulted in an increase in tritium activity in monitoring wells adjacent to the Unit 3 Turbine building.

See attached 30 day NRC notification and the Apparent Cause Evaluation performed as a result of the event.

ATTACHMENTS ARE OMITTED FROM REDACTED VERSION Adobe Acrobat Microsoft Word 97 -

OF THE HYDROGEOLOGIC Docurrent 2003 Docurrent INVESTIGATION REPORT DATED DECEMBER 2018 7

4.2 Which Hydrogeologic Studies (identified in section 1 of this questionnaire) were performed in response to these spills?

No additional studies were performed.

4.3 Have there been releases of other contaminants (non-radiological) to the subsurface soils and groundwater at the station such as fuel oil from a buried pipe or other type spills or releases.

Examples may include the discovery of a leak in the diesel fuel storage tank which required soil and groundwater investigations, or leaks from the Station's WWTP which impacted shall groundwater.

Please provide either a brief description, or reference specific documents that contain the information.

In January 2014, the admin building elevator leaked hydraulic fluid. See attached IRs for details. No fluid was detected in samples from surrounding monitoring wells or observed in nearby storm drains.

ATTACHMENTS ARE OMITTED

!!!I:: ~ FROM REDACTED VERSION OF THE HYDROGEOLOGIC Microsoft Word 97 - Microsoft Word 97 -

2003 Docurrent 2003 Docurrent INVESTIGATION REPORT DATED DECEMBER 2018

5. Existing Groundwater Remedial Actions Changes since May 2012 or since last hydrogeological update 5.1 Have groundwater or surface water remediation systems for tritium or other radionuclides been initiated or shut down?

Examples may include the stat up and routine monitoring of groundwater as part of a monitored natural attenuation remedy at former buried pipe leak location, or the shut down of active, pumping, remedies.

Please provide either a brief description, or reference specific documents that contain the information.

No.

8

Exelon Generation NEI07-07 May 15, 2015 U.S. Nuclear Regulatory Commission AlTN: Document Control Desk Washington, DC 20555-0001 Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3 Renewed Facility Operating License Nos. DPR-44 and DPR-56 NRC Docket Nos. 50-277 and 50-278

Subject:

Groundwater Protection Initiative (GPI) - Voluntary Special Report for Tritium Discovered On-Site This voluntary, special report is submitted in accordance with NEI 07-07, Industry Ground Water Protection Initiative - Final Guidance Document.

On April 17, 2015, a water sample from an on-site groundwater monitoring well was confirmed to contain a level of tritium in excess of the NEI 07-07 voluntary reporting threshold of 20,000 picocuries per liter. This water sample was collected on April 7, 2015 from just outside of the northeast comer of the Unit 3 Turbine Building. The level of tritium measured was 37,700 picocuries per liter.

A small accumulation of water on the turbine building floor was identified as a possible source and removed. Drainage was improved to prevent future accumulation. Follow-up sampling from the well has shown a declining trend. A sample obtained on May 4, 2015, contained 9,410 picocuries per liter.

The samples were obtained from a well that is for groundwater monitoring only. This event had no impact on any on-site or off-site drinking water wells. It is possible that the water could eventually migrate into the plant's outlet canal. If so, the potential dose to a member of the public would be negligible. This will be calculated as part of the site's annual effluent report.

There are no regulatory commitments contained in this document. If you have any questions or require additional information, please contact Mr. Frank Leone, Chemistry, Environmental and Radwaste Manager at 717-456-3844.

Patrick D. Navin Plant Manager Peach Bottom Atomic Power Station

U.S. Nuclear Regulatory Commission Page 2 May 15, 2015 cc: D. H. Dorman, US NRC, Administrator, Region I S. L. Hansell, US NRC, Senior Resident Inspector R.R. Janati, Commonwealth of Pennsylvania S. Grey, State of Maryland P. Steinhauer, PSE&G, Financial Controls and Co-owner Affairs R. Anderson, NEI (GW Notice@nei-org)

S. Focht, American Nuclear Insurer's CCN: 15-52 IR.2486460

GHD I Hydrogeologic Investigation Report 111137316 (1) pennsylvani Search PA

• CVlllmCHt OI' CDIKlllM!Clf IHl lllAnJllAI. OdDUllCn DCNR Home : Geological Survey: Groundwater : PaGWIS : R cords PaGWIS Records Geol ogical Survey About the Survey Map Search You must be zoomed to the level where municipality names appear to search.

Classroom Collecting 0 Multiple Criteria Map Economic Resources \/Velis 0 Springs Geology of PA Geologic Hazards Data Packages: General Info 0 Site Info 0 \/Veil Construction 0 Hydrogeolog ic 0 Geologic Groundwater Library 1848 Lay Rd, Delta, PA 17314 ~ Jump to Point PAM AP Web - Mapping 39 747. -76.269 re1 Iii 0 Include unlocated wells within intersected municipalities ~

Application Publications and Digital Data Geolinks Contact the Survey Search DCNR Ill 9':11 Find us on m Facebook Download Data Package I Clear Selections I Contact Us

'Download Data Package' creates a data package-specific CSV file that you may open or download. If you choose to open the file, it may open in Excel (if you have Microsoft Office installed). Because of the relational nature of the database, there may be more than 1 line per well in the downloaded data. For data on public water supply wells, or water quality data, please see instructions.

Instructions Total Records To Download : 29 Records View Items Below I

'View Items Below' creates a general list (not data package-specific) that contains links to individual well i nformation. It is based on the search criteria entered. Not all of the records displayed below will necessari ly have data corresponding to the data package you have selected.

For correct record counts after changing any search criteria or data package. you must click again on the "View Items Below button.

Total Records Returned : 28 Records Click on the column headers to sort the Search Results.

~- I I

,;nows rows ~ 1-'age 1 o ; ..J....Jj Driller Ref Date prilled Municipality Image BL MYERS BROS EXELON - PEACH 474696 MW-PB-31 5/25/2011 YORK PEACH BOTTOM TWP OF PA INC BOTTOM BL MYERS BROS EXELON - PEACH 484511 MW-PB-29 5/25/2011 YORK PEACH BOTTOM TWP.

OF PA. INC . BOTTOM BL MYERS BROS EXELON - PEACH 48451 2 MW-PB-30 5/25/2011 YORK PEACH BOTTOM TWP.

OF PA. INC BOTTOM EICHELBERGERS PEACH BOTTOM

~ INC KG10021-W1 5/25/20 10 NUCLEAR PLANT YORK PEACH BOTTOM TWP B L MYERS BROS Exelon Generation 488825 MW-PB27 2/16/2010 YORK PEACH BOTTOM TWP.

OF PA. INC Company LLC B L MYERS BROS Exelon Generation 488 185 MW-PB28 2/9/2010 YORK PEACH BOTTOM TWP.

OF PA. INC . Company LLC Peach Bottom Atomic

~ AMERIDRILL , INC 9188-2 7/28/2009 Power Station YORK PEACH BOTTOM TWP.

Peach Bottom Atomic 480161 AMERIDRILL, INC 9188-3 7/28/2009 YORK PEACH BOTTOM TWP Power Station Peach Bottom Atom ic 480864 AMER ID RILL, INC 9188-1 7/28/2009 YORK PEACH BOTTOM TWP Power Station EICHELBERGERS DS09080-617367 4/30/2009 EXELON YORK PEACH BOTTOM TWP INC . MWPB23 EICHELBERGERS DS08145-

§.1lIB 10131/2008 EXELON YORK PEACH BOTTOM TWP.

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618481 10/31/2008 EXELON YORK PEACH BOTTOM TWP.

INC MW21 EICHELBERGERS DS08145-617193 10131/2008 EXELON YORK PEACH BOTTOM TWP INC MW19 EICHELBERGERS DS08145-617195 10131/2008 EXELON YORK PEACH BOTTOM TWP INC MW15 EICHELBERGERS DS08145-618480 10131/2008 EXELON YORK PEACH BOTTOM TWP INC . MW22 EICHELBERGERS DS08145-fil.illI 10131/2008 EXELON YORK PEACH BOTTOM TWP INC . MW20 164028 AC REIDER INC 2/15/1 993 PHILA ELECTR IC CO YORK PEACH BOTTOM TWP MYERS BROS DRILLING 164053 12/15/1992 STOLTEFUS STEVEN YORK PEACH BOTTOM TWP CONTRACTORS INC Shows rows ~ Page 1 012 _J_

Map Search You must be zoomed to the level where municipality names appear to search.

0 Multiple Criteria @ Map

@ Wells 0 Springs Data Packages : @ General Info 0 Site Info 0 Well Construction 0 Hydrogeologic 0 Geologic 1848 Lay Rd, Delta, PA 17314 ~ Jump to Point 39.747, -76.269 * ,_ , 0 Include unlocated wells within intersected municipalities Download Data Package I Clear Selections I Contact Us

'Download Data Package' creates a data package-specific CSV file that you may open or download. If you choose to open the file, it may open in Excel (if you have Microsoft Office installed). Because of the relational nature of the database, there may be more than 1 line per well in the downloaded data. For data on public water supply wells, or water quality data, please see instructions.

Instructions Total Records To Download : 29 Records View Items Below I

'View Items Below' creates a general list (not data package-specific) that contains links to individual well information. It is based on the search criteria entered. Not all of the records displayed below will necessarily have

data corresponding to the data package you have selected.

For correct record counts after changing any search criteria or data package. you must click again on the "View Items Below" button.

Total Records Returned : 28 Records Click on the column headers to sort the Search Results.

Shows rows: ~ Page 2 of 2 ..J..JI PA Well Driller D[ill~r R~f Date Drilled Owner County Municipality Image ID ANDERSON WELL 164046 DRILLING & PUMP 7/1/1992 BERTIER RICHARD YORK PEACH BOTTOM TWP.

SALES 164038 DAVID KELLY LLC 7/11/1990 ANTONE KOLB YORK PEACH BOTTOM TWP.

JWWILLWERT 164118 11/1/1989 ANDREWS GARY YORK PEACH BOTTOM TWP.

DRILLING MYERS BROS DRILLING 164131 12/22/1986 HOSTETTER J YORK PEACH BOTTOM TWP.

CONTRACTORS INC JWWILLWERT 163921 3/1/1982 HOWARD R YORK PEACH BOTTOM TWP.

DRILLING GURVIS JONES 163968 7/1/1980 ROBINSON D YORK PEACH BOTTOM TWP.

WELL DRILLING INC 1ill.Q AC REIDER INC 1/1/1968 FINCH, WARNER YORK PEACH BOTTOM TWP.

HARRISBURG'S PEACH BOTTOM 34279 1/1/1962 YORK PEACH BOTTOM TWP.

KOHL BROS INC ATOMIC Shows rows: ~ Page 2 of2 _J_J

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" 12 r.1..

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• 76.27444 EICllElBERGERS INC. 08S£RVAT10N UNUSED IOS 0 26 617367 YORK P£ACll BOTTOM TWP 1848 lAY RO 17314 4/3l1/20C1J NEW WELL 39 76639 76.27444 EICllHBERGERS INC EXHON OBSCRVATION 617195 YORK PEACH BOTTOM TWP 1848lAYRO. 17314 10/31/2008 NEWWEll 39.76639 *76.27444 EICtlEl&RGERSINC. EXELON OBSERVATION UNUS£0 19 r.1..

617194 YORK PEACll BOTTOM TWP. 1848LAYRO. 17314 10/31/2008 NEWWEU 39.76639 *76.27444 EICHHBERGERSINC. EXELON OBSERVATION UNUSED 17314 10/31/2008 NEWWEll OBSERVATION !OS O 617184 YORK PCACllBOTTOMTWP 1848lAYRO. 17314 10/31/2008 NEWWEll 39.76639 *76.27444 UCllElBERGERSINC. EXELON OBSERVATION UNUS£D !OS O 25 P£Actl 80TTOM NUUEAR 17314 5/25/1010 39.76573 EICllEIBERGER51NC. OBSERVATION UNUSED 0 II l'tANT 488825 YORK PEACH BOTTOM TWP 1848 lay Road 2/16/1010 NEWWlll 39.76593 -76.26855 :A~:~ER BR05.0f ~:~G*nnatlonCOfnfWIY 5

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~t-_,7!,Bottom Atomic Powpr MONITORING 480160 YORK P£AOt BOTTOM TWP 1848lai,Rd.

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~h.llPA Botlom: 1848 I.If Rd. DPh<ll PA PETERSCRHK 1/1/1968 *76.28111 0 11 10 CURRENTMITTR SCIUSl PETERS CREEK J427'J YORK PEACllOOTTOMTWP HCM.TWOOD 1/1/1961 39.75583 *76.2fi694  :::::.URG.SKOlf\. PEAOlBOTTDMATOMIC WflllOl'IAWAl COMM£RCIAL 327 0 44 SClllST 164131 YORK PEACllBOTTOM TWP llCM.TWOOO 11/22/1986 NEWWEll 39.7r.l3l *76.1825 =~l'::roBROS llOSTETTERI WfJHORAWAI. OOM[SJI( 260 lo 67 so ,.... P£TERSCRE£K SCHIST 164118 YORK PEACllBOTTOMTWP llCM.TWOOD 11/1/1989 NEWWEll 39.76611 *76.18056 ~:~WERT ANDREWS GARY WflHORAWAI. OOMlSltc 75 32 ,.... 1.75 ESTIMATED P£TERSCREEK SCHIST PETERSCRHK 164053 YORK PEAOt BOTTOM TWP llCM.TWOOD 11/15/1992 NEWWHl J'J.75.c72 *76.18306 DRILLING SlOLTHUSSTEVEN wtltlDRAWAI. OOM[SllC 150 0 65 1.5 VCM.UMETRICWATCll & 8UCK£T SCHIST 164046 YORK PEArn BOTIOM TWP OHTA 7/1/1992 NEWWEll 39.765 6 28389

• 7

• ANDERSON WELL DRILLING & PUMP BERTIERR1CllARO WITHDRAWAL OOMESllC 145 0 ,..... 10 40 110 ESTIMATI.D PETERSCRHK SCHIST RT*DIRT;WBZ*IJ53*56;2)84-85 P£TER5CRHK 164038 YORK PEAOt BOTTOM TWP llOt.TWOOD 7/11/1990 NEWWfll 39.76611 -76.27917 OAVlDKEUYUC ANTONE KOlB WITHDRAWAL OOMESllC 125 0 10 10

" SClllST PETERSCRHK 164038 YORK PCACll BOTTOM TWP tlCM.TWOOO 7/11/l'RO NEWWEll 39.76611 -76.27917 OAVlDKEllYUC ANTONE KCM.8 W1TllDllAWAl OOM[SllC 125 fO 21 10 r.is. 12 54 78 WBl*1)68*70 2/15/l'!T'J] 196 VOt.UMCTRIC WATCH & 8UCK£T SERPENTINITE

~l~~~:: WHL 5 PETERS CREEK

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All LOCATIONS APPROXIMATE HOl.'l'NOOO. ~A *

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(NOT FIELD VERIFIED) WAKEFIELC "'A * !"8 lllCl!IJ ll'ICI.'IUUI, STE.VE,.

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• INFORMI. TON C l'.tm! II

ID t:liZl.OH * &OVIM IUllTA110N EXELON SUPPLY WEU {NON*POTABLE) 21 ITOL'IZl'W WATER WELL LOCATIONS Exelon. PEACH BOTTOM ATOMIC POWER STATION EXELON GENERATION COMPANY, LLC

~ Delta, Pennsylvania

!>3531M2(005)GN*WA008 NOV8/2012 Figure A-1 Well Water Locations, Peach Bottom Atomic Power Station. 2015 A*2

Appendix C RGPP Sampling Plan, Exelon Nuclear Procedure EN-PB-408-4160, Rev. 4 (RGPP Reference Material For Peach Bottom Atomic Power Station)

OMITTED GHD I Hydrogeologic Investigation Report I 11137316 (1)

APPENDIX G ANNUAL RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM REPORT (ARGPPR)

Docket No: 50-277 50-278 PEACH BOTTOM ATOMIC POWER STATION UNITS 2 and 3 Annual Radiological Groundwater Protection Program Report (ARGPPR)

January 1 through December 31, 2016 Prepared By Teledyne Brown Engineering Environmental Services Exelon Generation .

Peach Bottom Atomic Power Station Delta, PA 17314 May 2017

Table of Contents I. Summary and Conclusions .............................................................................................. 1 II. Introduction ..................................................................................................................... 2 A. Objectives of the RGPP ...................................................................................... 2 B. Implementation of the Objectives ........................................................................ 3 C. Program Description ........................................................................................... 3 D. Characteristics of Tritium (H-3) ........................................................................... 4 Ill. Program Description ...................................................................................................... 5 A. Sample Analysis .................................................................................................. 5 B. Data Interpretation ............................................................................................... 5 C. Background Analysis ........................................................................................... 6 IV. Results and Discussion ................................................................................................. 8 A. Groundwater Results ........................................................................................... 8 B. Surface Water Results ...................................................................................... 10 C. Precipitation Water Results ............................................................................... 11 D. Drinking Water Well Survey .............................................................................. 11 E. Summary of Results - Inter-laboratory Comparison Program .......................... 11 F. Leaks, Spills, and Releases .............................................................................. 11 G. Trends ............................................................................................................... 11 H. Investigations .................................................................................................... 12 I. Actions Taken .................................................................................................... 13 J. Deviations .......................................................................................................... 14 V. References ................................................................................................................... 14

Appendices Appendix A Sampling Locations, Distance and Direction Tables Table A-1 Radiological Groundwater Protection Program - Sampling Locations, Distance and Direction, Peach Bottom Atomic Power Station, 2016 Figures Figure A-1 Well Water Locations, Peach Bottom Atomic Power Station, 2016 Figure A-2 RGPP Monitoring Locations, Peach Bottom Atomic Power Station, 2016 Appendix B Data Tables Tables Table B-1.1 Concentrations of Tritium, Strontium, Gross Alpha and Gross Beta in Groundwater and Seep Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2016 Table B-1.2 Concentrations of Gamma Emitters in Groundwater and Seep Water Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2016 Table B-1.3 Concentrations of Hard-to-Detects in Groundwater Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2016 Table B-11.1 Concentrations of Tritium in Surface Water Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2016 Table B-11.2 Concentrations of Gamma Emitters in Surface Water Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2016 Table B-111.1 Concentrations of Tritium in Precipitation Water Samples Collected as Part of the Radiological Groundwater Protection Program, Peach Bottom Atomic Power Station, 2016 ii

I. Summary and Conclusions This report on the Radiological Groundwater Protection Program (RGPP) conducted for the Peach Bottom Atomic Power Station (PBAPS) by Exelon Nuclear covers the period 01January2016 through 31 December 2016. This evaluation involved numerous station personnel and contractor support personnel. At PBAPS, there are 31 permanent groundwater monitoring wells.

Installation of the wells began in 2006. Of these monitoring locations, none were assigned to the station's Radiological Environmental Monitoring Program (REMP). This is the tenth in a series of annual reports on the status of the RGPP conducted at PBAPS. This report covers groundwater, surface water, seep water, and precipitation water samples collected from the environment on station property in 2016. During that time period, 1,411 analyses were performed on more than 336 samples from 41 locations. These 41 locations include 27 groundwater monitoring wells, 3 surface water sample points, 3 groundwater seeps and 2 yard drain sumps (groundwater) and 6 precipitation water sampling points. Phase 1 of the monitoring was part of a comprehensive study initiated by Exelon to determine whether groundwater or surface water in the vicinity of PBAPS had been adversely impacted by any releases of radionuclides. Phase 1 was conducted by Conestoga Rovers and Associates (CRA) and the conclusions were made available to state and federal regulators as well as the public. Phase 2 of the RGPP was conducted by Exelon corporate and station personnel to initiate follow up of Phase 1 and begin long-term monitoring at groundwater and surface water locations selected during Phase 1.

All analytical results from Phase 2 monitoring are reported herein.

Samples supporting the RGPP were analyzed for Tritium, Strontium-89 (Sr-89),

Strontium-90 (Sr-90), gross alpha, gross beta, gamma-emitting radionuclides associated with licensed plant operations and isotopes known as 'hard to detects'.

In assessing all the data gathered for this report, it was concluded that the operation of PBAPS had no adverse radiological impact on the environment and there are currently no known active releases into the groundwater at PBAPS.

Tritium was not detected at any location in concentrations greater than the United States Environmental Protection Agency (USEPA) drinking water standard (and the Nuclear Regulatory Commission [NRC] Reporting Limit) of 20,000 pCi/L.

Tritium was not detected at concentrations greater than the minimum detectable concentration (MDC) in any surface water, seep water or precipitation water sample locations. Based on the sample data tritium is not migrating off the station property at detectable concentrations.

11. Introduction PBAPS is located along the Susquehanna River between Holtwood and Conowingo Dams in Peach Bottom Township, York County, Pennsylvania. The initial loading of fuel into Unit 1, a 40 MWe (net) high temperature gas-cooled reactor, began on 5 February 1966, and initial criticality was achieved on 3 March 1966. Shutdown of Peach Bottom Unit 1 for decommissioning was on 31 October 1974. For the purposes of the monitoring program, the beginning of the operational period for Unit 1 was considered to be 5 February 1966. A summary of the Unit 1 preoperational monitoring program was presented in a previous report

!1>. PBAPS Units 2 and 3 are boiling water reactors, each with a power output of approximately 1366 MWe. The first fuel was loaded into Peach Bottom Unit 2 on 9 August 1973. Criticality was achieved on 16 September 1973 and full power was reached on 16 June 1974. The first fuel was loaded into Peach Bottom Unit 3 on 5 July 1974. Criticality was achieved on 7 August 1974 and full power was first reached on 21 December 1974. Preoperational summary reports !2H3l for Units 2 and 3 have been previously issued and summarize the results of all analyses performed on samples collected from 5 February 1966 through 8 August 1973.

This report covers those analyses performed by Teledyne Brown Engineering (TBE) on samples collected in 2016.

A. Objective of the RGPP The objectives of the RGPP are as follows:

1. Ensure that the site characterization of geology and hydrology provides an understanding of predominant groundwater gradients based upon current site conditions.

2. Identify site risk based on plant design and work practices.

3. Establish an on-site groundwater monitoring program to ensure timely detection of inadvertent radiological releases to ground water.

4. Establish a remediation protocol to prevent migration of licensed material off-site and to minimize decommissioning impacts.

5. Ensure that records of leaks, spills, remediation efforts are retained and retrievable to meet the requirements of 10 CFR 50.75(g).

6. Conduct initial and periodic briefings of their site specific Groundwater Protection Initiative (GPI) program with the designated State/Local officials.

7. Make informal communication as soon as practicable to appropriate 2

State/Local officials, with follow-up notifications to the NRC, as appropriate, regarding significant on-site leaks/spills into groundwater and on-site or off-site water sample results exceeding the criteria in the REMP as described in the OCDM .

8. Submit a written 30-day report to the NRC for any water sample result for on-site groundwater that is or may be used as a source of drinking water that exceeds any of the criteria in the licensee's existing REMP/ODCM for 30-day reporting of off-site water sample results.

9. Document all on-site groundwater sample results and a description of any significant on-site leaks/spills into groundwater for each calendar year in the Annual Radiological Environmental Operating Report (AREOR) for REMP or the Annual Radioactive Effluent Release Report (ARERR).

10. Perform a self-assessment of the GPI program.

11. Conduct a review of the GPI program, including at a minimum the licensee's self-assessments, under the auspices of the Nuclear Energy Institute (NEI).

B. Implementation of the Objectives The objectives identified have been implemented at PBAPS via Corporate and Site specific procedures. These procedures include:

1. EN-AA-407, Response to Inadvertent Releases of Licensed Materials to Groundwater, Surface Water, Soil or Engineered Structures

2. EN-AA-408, Radiological Groundwater Protection Program

3. EN-AA-408-4000, Radiological Groundwater Protection Program Implementation

4. EN-PB-408-4160, RGPP Reference Material for Peach Bottom Atomic Power Station C. Program Description

1. Sample Collection Sample locations can be found in Table A-1 and Figures A-1 and A-2, Appendix A.

3

Groundwater. Surface Water and Precipitation Water Samples of water are collected, managed, transported and analyzed in accordance with approved procedures. Sample locations, sample collection frequencies and analytical frequencies are controlled in accordance with approved station procedures.

Contractor and/or station personnel are trained in the collection, preservation management and shipment of samples, as well as in documentation of sampling events. Analytical laboratories are subject to internal quality assurance programs, industry cross-check programs, as well as nuclear industry audits. Station personnel review and evaluate all analytical data deliverables as data are received.

Analytical data results are reviewed by both station personnel and an independent hydro geologist for adverse trends or changes to hydrogeologic conditions.

D. Characteristics of Tritium (H-3)

Tritium (chemical symbol H-3) is a radioactive isotope of hydrogen. The most common form of tritium is tritium oxide, which is also called "tritiated water." The chemical properties of tritium are essentially those of ordinary hydrogen.

Tritiated water behaves the same as ordinary water in both the environment and the body. Tritium can be taken into the body by drinking water, breathing air, eating food or absorption through skin. Once tritium enters the body it disperses quickly and is uniformly distributed throughout the body. Tritium is excreted primarily through urine with a clearance rate characterized by an effective biological half-life of about 14 days. Within one month or so after ingestion essentially all tritium is cleared.

Organically bound tritium (tritium that is incorporated in organic compounds) can remain in the body for a longer period.

Tritium is produced naturally in the upper atmosphere when cosmic rays strike air molecules. Tritium is also produced during nuclear weapons explosions, as a by-product in reactors producing electricity and in special production reactors, where the isotopes Lithium-7 (Li-7) and/or Boron-10 (B-10) are activated to produce tritium. Like normal water, tritiated water is colorless and odorless. Tritiated water behaves chemically and physically like non-tritiated water in the subsurface and therefore tritiated water will travel at the same velocity as the average groundwater velocity.

Tritium has a half-life of approximately 12.3 years. It decays spontaneously to Helium-3 (He-3). This radioactive decay releases a beta 4

particle (low-energy electron). The radioactive decay of tritium is the source of the health risk from exposure to tritium. Tritium emits a low energy beta particle and leaves the body relatively quickly. Since tritium is almost always found as water, it goes directly into soft tissues and organs.

The associated dose to these tissues is generally uniform and is dependent on the water content of the specific tissue.

Ill. Program Description A. Sample Analysis This section describes the general analytical methodologies used by TBE and Environmental Inc. Midwest Laboratories (EIML) to analyze the environmental samples for radioactivity for the PBAPS RGPP in 2016.

In order to achieve the stated objectives, the current program includes the following analyses:

1. Concentrations of gamma emitters in groundwater and surface water.

2. Concentrations of strontium in groundwater.

3. Concentrations of tritium in groundwater, surface water and precipitation water.

4. Concentrations of 'hard-to-detect' isotopes, Americium-241 (Am-241 ), Cerium-242/243/244 (Cm-242, Cm-243, Cm-244),

Plutonium-238/239/240 (Pu-238, Pu-239, Pu-240), Uranium-233/234/235/238 (U-233, U-234, U-235, U-238), lron-55 (Fe-55),

and Nickel-64 (Ni-63) in groundwater. These analyses are required based on tritium results.

B. Data Interpretation The radiological data collected prior to PBAPS becoming operational were used as a baseline with which these operational data were compared.

For the purpose of this report, PBAPS was considered operational at initial criticality. Several factors were important in the interpretation of the data:

1. Lower Limit of Detection The lower limit of detection (LLD) is a minimum sensitivity value that must be achieved routinely by the analytical parameter.

5

2. Laboratory Measurements Uncertainty The estimated uncertainty in measurement of tritium in environmental samples is frequently on the order of 50% of the measurement value.

Statistically, the exact value of a measurement is expressed as a range with a stated level of confidence. The convention is to report results with a 95% level of confidence. The uncertainty comes from factors such as calibration standards, sample volume or weight measurements, and sampling uncertainty. Exelon reports the uncertainty of a measurement created by statistical process (counting error) as well as all sources of error (Total Propagated Uncertainty or TPU). Each result has two values calculated.

Exelon reports the TPU by following the result with plus or minus +/-

the estimated sample standard deviation as TPU that is obtained by propagating all sources of analytical uncertainty in measurements.

Analytical uncertainties are reported at the 95% confidence level in this report for reporting consistency with the AREOR.

Gamma spectroscopy results for each type of sample were grouped as follows:

For groundwater and surface water 12 nuclides, Manganese-54 (Mn-54), Colbalt-58/50 (Co-58, Co-60),

lron-59 (Fe-59), Zinc-65 (Zn-65) , Niobium-95 (Nb-95),

Zirconium-95 (Zr-95), lodine-131 (1-131), Cerium-134/137 (Cs-134, Cs-137), Barium-140 (Ba-140) and Lanthanum-140 (La-140) are measured.

C. Background Analysis A pre-operational REMP was conducted to establish background radioactivity levels prior to operation of the Station . The environmental media sampled and analyzed during the pre-operational REMP were atmospheric radiation, fall-out, domestic water, surface water, marine life and foodstuffs. The results of the monitoring were detailed in the report entitled PBAPS, Environs Radiation Monitoring Program, Preoperational Summary Report Units 2 and 3, September 1970- August 1973, January 1974 and PBAPS, Environs Radiation Monitoring Program, Preoperational Summary Report Units 2 and 3, June 1977. The pre-operational REMP contained analytical results from samples collected from the surface water, discharge, well and rain water.

6

1. Background Concentrations of Tritium The purpose of the following discussion is to summarize background measurements of tritium in various media performed by others. Additional detail may be found by consulting references (CRA 2006)(1l.

a. Tritium Production Tritium is created in the environment from naturally occurring processes both cosmic and subterranean, as well as from anthropogenic (i.e., man-made) sources. In the upper atmosphere, "Cosmogenic" tritium is produced from the bombardment of stable nuclides and combines with oxygen to form tritiated water, which will then enter the hydrologic cycle. Below ground , "lithogenic" tritium is produced by the bombardment of natural Li present in crystalline rocks by neutrons produced by the radioactive decay of naturally abundant U and Th. Lithogenic production of tritium is usually negligible compared to other sources due to the limited abundance of Li in rock. The lithogenic tritium is introduced directly to groundwater.

A major anthropogenic source of tritium and Sr-90 comes from the former atmospheric testing of thermonuclear weapons. Levels of tritium in precipitation increased significantly during the 1950s and early 1960s and later with additional testing, resulting in the release of significant amounts of tritium to the atmosphere. The Canadian heavy water nuclear power reactors, other commercial power reactors, nuclear research and weapons production continue to influence tritium concentrations in the environment.

b. Precipitation Data Precipitation samples are routinely collected at stations around the world for the analysis of tritium and other radionuclides . Two publicly available databases that provide tritium concentrations in precipitation are Global Network of Isotopes in Precipitation (GNIP) and USEPA's RadNet database. GNIP provides tritium precipitation concentration data for samples collected worldwide from 1960 to 2006.

RadNet provides tritium precipitation concentration data for samples collected at stations throughout the U.S. from 1960 up to and including 2006. Based on GNIP data for sample stations located in the U.S. Midwest, tritium concentrations 7

peaked around 1963. This peak, which approached 10,000 pCi/L for some stations, coincided with the atmospheric testing of thermonuclear weapons. Tritium concentrations in surface water showed a sharp decline up until 1975 followed by a gradual decline since that time. Tritium concentrations have typically been below 100 pCi/L since around 1980.

Tritium concentrations in wells may still be above the 200 pCi/L detection limit from the external causes described above. Water from previous years and decades is naturally captured in groundwater, so some well water sources today are affected by the surface water from the 1960s that was elevated in tritium.

c. Surface Water Data Surface water level measurements were collected at the surface water monitoring locations during the groundwater level measurement event. The purpose of the surface water monitoring was to provide surface water elevation data to evaluate the groundwater/surface water interaction at the Station.

The USEPA RadNet surface water data typically has a reported 'Combined Standard Uncertainty' of 35 to 50 pCi/L.

According to USEPA, this corresponds to a +/- 70 to 100 pCi/L 95% confidence bound on each given measurement.

Therefore, the typical background data provided may be subject to measurement uncertainty of approximately +/- 70 to 100 pCi/L.

The radio-analytical laboratory is counting tritium results to an Exelon specified LLD of 200 pCi/L. Typically, the lowest positive measurement will be reported within a range of 40 -

240 pCi/L or 140 +/- 100 pCi/L. Clearly, these sample results cannot be distinguished as different from background at this concentration.

IV. Results and Discussion A. Groundwater Results Groundwater Samples were collected from on-site wells throughout the year in accordance with the station radiological groundwater protection program.

8

Analytical results and anomalies are discussed below.

Tritium Samples from 41 locations were analyzed for tritium activity (Tables B-1.1, B-11.1 and B-111.1, Appendix B}. Tritium values ranged from the detection limit to 11,000 pCi/L. Tritium was not detected in wells at or near the owner-controlled boundary. The location most representative of potential offsite user of drinking water is less than the MDC (Table B-1.1, Appendix B}.

Low levels of tritium were detected at concentrations greater than the minimum detectable concentration (MDC} in 11 of 27 groundwater monitoring wells and 1 yard drain sump location. The tritium concentrations ranged from 181 pCi/L to 11,000 pCi/L (Table B-1.1, Appendix B}.

No tritium was detected in any surface water samples (Table B-11.1, Appendix B}. No tritium was detected in any precipitation water samples (Table B-111.1, Appendix B).

Sr-89 and Sr-90 were not detected in any of the samples (Table B-1.1, Appendix B).

Gross Alpha and Gross Beta (dissolved and suspended)

Gross Alpha and Gross Beta analyses in the dissolved and suspended fractions were performed on groundwater samples during 2016.

Gross Alpha (dissolved} was detected in 6 of 24 groundwater locations analyzed. The concentrations ranged from 1.5 to 14.6 pCi/L.

Gross Alpha (suspended} was detected in 9 of 24 groundwater locations analyzed. The concentrations ranged from 1.3 to 13.9 pCi/L.

Gross Beta (dissolved) was detected in 24 of 24 groundwater locations analyzed. The concentrations ranged from 1.2 to 50.7 pCi/L.

Gross Beta (suspended) was detected in 6 of 24 groundwater locations analyzed. The concentrations ranged from 1.6 to 12.1 pCi/L.

The activity detected is consistent with historical levels. The activity detected is naturally occurring and the levels are considered to be background (Table B-1.1, Appendix B}.

9

Hard-To-Detect Hard-To-Detect analyses were performed on a select group of groundwater and surface water locations to establish baseline levels. The analyses for groundwater included Fe-55, Ni-63, Am-241, Cm-242, Cm-243/244, Pu-238, Pu-239/240, U-234, U-235 and U-238.

U-234 was detected in 7 of 24 groundwater monitoring locations analyzed .

The concentrations ranged from 0.22 to 15.07 pCi/L.

U-235 was detected in 1 of 24 groundwater monitoring locations analyzed.

The concentrations was 0.45 pCi/L.

U-238 was detected in 7 of 24 groundwater monitoring locations analyzed.

The concentrations ranged from 0.21to13.71 pCi/L. No plant-produced radionuclides were detected.

The activity detected is naturally occurring and the levels are considered to be background (Table B-1.3, Appendix B).

Gamma Emitters No power-production gamma emitters were detected in any of the samples (Table B-1.2, Appendix B).

B. Surface Water Results Surface Water Samples were collected from surface water locations throughout the year in accordance with the station radiological groundwater protection program. Analytical results are discussed below.

Tritium Samples from three locations were analyzed for tritium activity. Tritium was not detected in any samples (Table B-11.1, Appendix B).

Gamma Emitters No power-production gamma emitters were detected in any of the samples. No other gamma emitting nuclides were detected (Table B-11.2, Appendix B).

10

C. Precipitation Water Results Precipitation Water Samples were collected at six locations (1A, 1B, 1S, 1SSE, 1Z, and 4M) in accordance with the station radiological groundwater protection program.

The following analysis was performed :

Tritium Samples from six locations were analyzed for tritium activity. Tritium activity was not detected in any samples (Table B-111.1, Appendix B).

D. Drinking Water Well Survey A drinking water well survey was conducted during the summer 2006 by CRA (CRA 2006)(1) around PBAPS. The water well inventory was updated in 2012<4 l_ The updated water well database search indicated a new water well off Station property within a one mile radius of the Station. The well is described as a "test" well and its use is listed as "unused". In summary, there were no significant changes in off Station groundwater use from 2006-2012.

E. Summary of Results - Inter-Laboratory Comparison Program Inter-Laboratory Comparison Program results for TBE and Environmental Inc. (Midwest Labs) are presented in the AREOR.

F. Leaks, Spills and Releases There were no inadvertent leaks, spills or releases of water containing licensed material to the environment in 2016.

G. Trends A tritium plume has been identified northeast of the Unit 3 Turbine Building. The plume extends eastward toward well MW-PB-4. The plume is bounded on the north by wells MW-PB-12 and MW-PB-22 . The plume is bounded on the south by wells MW-PB-20 and MW-PB-21.

The tritium plume is a result of licensed material entering the groundwater through degraded floor seams and penetration seals in the Unit 3 Turbine Building. The activity currently detected in the Unit 3 Turbine Building monitoring wells, MW-PB-24, 25, 26 and 27, is the result of legacy licensed material under the turbine building being transported eastward by natural hydrogeologic groundwater flow.

11

Tritium activity in the Unit 3 Turbine Building monitoring wells are trended.

Any adverse trend is captured in the Station's Corrective Action Program.

H. Investigations MW-PB-4 In 2006, monitoring wells MW-PB-1 through MW-PB-14 were installed.

Tritium activity was detected in MW-PB-4, located north of the Unit 3 Circulating Water Pump Structure and MW-PB-12, north of the Administration Building. Groundwater flow on site is from west to east.

Monitoring wells were installed to the west, southwest and northwest of monitoring wells MW-PB-4 and MW-PB-12. The wells with the highest tritium activity are the wells installed directly east of and adjacent to the Unit 3 Turbine Building, wells MW-PB-24, 25, 26 and 27.

Investigation of potential sources identified that the likely source of groundwater contamination was due to degraded floor seams in the Unit 3 Turbine Building Moisture Separator area 116' elevation. Leaks internal to the building entered the groundwater through the degraded floor seams.

The floor seams were repaired in August 2010. The floor in the Unit 3 Turbine Building Moisture Separator area 116' elevation was sealed and recoated in October 2011 .

MW-PB-29, 30 and 31 An extent-of-condition inspection of the Unit 2 Turbine Building Moisture Separator area 116' elevation floor was performed in October 2010. Minor degradation of the floor seams was identified and repaired.

In May 2011, monitoring wells MW-PB-29 and 30 were installed directly east of and adjacent to the Unit 2 Turbine Building; MW-PB-31 was installed southeast of and adjacent to the Unit 2 Turbine Building. These wells were installed to determine if a condition existed east of the Unit 2 Turbine Building that is similar to the condition east of the Unit 3 Turbine Building.

Tritium activity in these wells ranged from less than the MDC to 696 pCi/L.

Samples from these wells were also analyzed for gamma-emitting isotopes and hard-to-detect radionuclides. All results are less than the MDC for each isotope.

The Unit 2 Turbine Building Moisture Separator floor 116' elevation floor was sealed and recoated in October 2012. Groundwater intrusion into a ventilation pit on the east side of the area was identified. The groundwater was removed and degraded seams in the ventilation pit were successfully repaired.

12

MW-PB-24, 25, 26 and 27 Wells MW-PB-24, 25, 26 and 27 are considered the wells of primary interest. These wells were sampled on a frequency ranging from weekly to quarterly. Below are 3 tables. The first lists the highest tritium activity of the wells of primary interest and the date of the sampling. The second table lists the highest tritium activity of the wells during 2016. The third table lists the activity of the wells from the last sampling of 2016. The tritium activity is in pCi/L.

Well# Tritium Activity Date MW-PB-24 33,500 3/15/2010 MW-PB-25 161,000 3/8/2010 MW-PB-26 196,000 3/8/2010 MW-PB-27 71,800 2/22/2010 Well# Tritium Activity Date MW-PB-24 3,270 8/23/2016 MW-PB-25 11,00 4/5/2016 MW-PB-26 401 4/26/2016 MW-PB-27 1,830 4/26/2016 Well# Tritium Activity Date MW-PB-24 246 11/30/2016 MW-PB-25 5,150 11/30/2016 MW-PB-26 345 11/30/2016 MW-PB-27 892 11/30/2016 Potential sources of tritium in the groundwater are investigated via procedural processes and documented in the corrective action program.

The most likely pathway for tritium to enter the groundwater has been determined to be leaks internal to the Unit 3 Turbine Building Moisture Separator 116', migrating through degraded floor seams or other unidentified openings in the floor.

I. Actions Taken

1. Unit 3 Turbine Building Moisture Separator area 116' - A primary system leak past HV-3-01 A-32044B was repaired , preventing water from accumulating (retired PIMS Work Order C0259275).

Unit 2 Turbine Building Moisture Separator area 116: - Blank floor drain covers were replaced with slotted floor drain covers (Issue Report 2733795).

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2. Installation of Monitoring Wells No groundwater monitoring wells were installed in 2016.

3. Actions to Recover/Reverse Plumes There were no actions to recover the plume.

J. Deviations The data tables show that duplicate samples were obtained at several wells during 2016. These duplicate samples were obtained and analyzed for quality control purposes.

For the U/2 Yard Drain sample taken 04/19/16, TBE's lab was unable to reach the client-required detection limits due to its age at the time of analysis for the following nuclides: Co-58, Fe-59, Zn-65, Nb-95, Zr-95, 1-131, Ba-140, and La-140. The sample was received on 05/03/16 and gamma was not originally requested on the paperwork received with the sample . The analysis was done promptly upon discovery of the omission and the sample was counted for 891 minutes to achieve the lowest possible MDC.

Due to regional drought conditions, seep SP-PB-3, located west of the Low Level RadWaste Storage Facility was dry during the 4th quarter of 2016. No sample was obtained or analyzed.

V. References

1. Conestoga Rovers and Associates, Fleetwide Assessment, Peach Bottom Atomic Power Station, Delta, PA, Fleetwide Assessment, Rev. 1, September 1 2006.

t

2. Peach Bottom Atomic Power Station, Environs Radiation Monitoring Program, Preoperational Summary Report units 2 and 3, June 1977.

3. Peach Bottom Atomic Power Station, Environs Radiation Monitoring Program, Preoperational Summary Report units 2 and 3, September 1970-August 1973, January 1974.

4. Conestoga Rovers and Associates, Hydrogeologic Investigation Report, Peach Bottom Atomic Power Station, November 2012.

5. AMO Environmental Decisions, 2016 RGPP Summary Monitoring Reports, April 2016, August 2016, October 2016 and February 2017.

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APPENDIX A SAMPLING LOCATIONS, DISTANCE AND DIRECTION

TABLE A-1 : Radiological Groundwater Protection Program

• Sampling Locations.

Distance and Direction. Peach Bottom Atomic Power Station, 2016 Site Site Type Sector Distance (ft.)

MW-PB-1 Groundwater Well SW 1,166.6 MW-PB-2 Groundwater Well WNW 309.0 MW-PB-3 Groundwater Well SSE 709.7 MW-PB-4 Groundwater Well ENE 350.2 MW-PB-5 Groundwater Well NNW 1,146.1 MW-PB-6 Groundwater Well NE 1,072.4 MW-PB-7 Groundwater Well SE 813.9 MW-PB-8 Groundwater Well SE 1,167.0 MW-PB-9 Groundwater Well SE 2,816.9 MW-PB-10 Groundwater Well SSE 1,125.1 MW-PB-11 Groundwater Well SE 438.4 MW-PB-12 Groundwater Well NNE 317.2 MW-PB-13 Groundwater Well NW 329.4 MW-PB-14 Groundwater Well s 1,231.2 MW-PB-15 Groundwater Well SE 1,087.9 MW-PB-16 Groundwater Well SE 1,101 .6 MW-PB-17 Groundwater Well SE 1,005.4 MW-PB-18 Groundwater Well SE 1,010.0 MW-PB-19 Groundwater Well NW 226.8 MW-PB-20 Groundwater Well E 260.5 MW-PB-21 Groundwater Well E 363.3 MW-PB-22 Groundwater Well NE 315.4 MW-PB-24 Groundwater Well N 185.9 MW-PB-25 Groundwater Well N 159.7 MW-PB-26 Groundwater Well NNE 121 . 1 MW-PB-27 Groundwater Well NNE 139.1 MW-PB-28 Groundwater Well NW 249.6 MW-PB-29 Groundwater Well SE 325.0 MW-PB-30 Groundwater Well SE 379.2 MW-PB-31 Groundwater Well SE 450.1 SW-PB-1 Surface Water NNW 2,850.5 SW-PB-5 Surface Water SE 675.1 SW-PB-6 Surface Water SE 1,305.9 SP-PB-1 Groundwater Seep s 514 .2 SP-PB-2 Groundwater Seep WNW 311 .6 SP-PB-3 Groundwater Seep NNW 1,281.1 U/2 YARD DRAIN SUMP Groundwater SSE 498.7 U/3 YARD DRAIN SUMP Groundwater WSW 175.8 1A Precipitation Water ESE 1,271 1B Precipitation Water NW 2,587 1S Precipitation Water s 1,315 1SSE Precipitation Water SSE 1,312 1Z Precipitation Water SE 1,763 4M Precipitation Water SE 45,989 A-1

1-MILE RADIUS 0 1000 2000ft Mt Johnson Island

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~ Della, Pennsylvania 53539-12(005)GN-WA008 NOV612012 Figure A-1 Well Water Locations, Peach Bottom Atomic Power Station , 2016 A-2

1. SWPB-1

~Es MN-PB-5 SP-PB-3 #

1. MN-PB-6 MN-PB-24 MN-PB-28

-- ~ ~-PB-7 MN-PB-3

1. -f'B-17 # MN-PB-18 MN-PB-1 MN-PB-15 t MN-PB-j 6 MN-PB-10 # MN-PB-8

• Si/¥PB-6 MN-PB-14 MN-PB-9 1000 0 1000 Fea

1. RGPP Surface Water and Groundwater San-pie Locations Figure A-2 RGPP Monitoring Locations, Peach Bottom Atomic Power Station, 2016 A-3

APPENDIX B DATA TABLES

TABLE B-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER AND SEEP SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

MW-PB-1 04/26/16 TBE < 193 MW-PB-1 04/26/16 TBE < 181 MW-PB-1 04/26/16 EIML < 147 MW-PB-2 02/02/16 < 194 MW-PB-2 04/25/16 < 194 < 5.3 < 0.5 2.1 +/- 0.7 < 1.3 5.3 +/- O.B < 23 MW-PB-2 07/26/16 < 171 MW-PB-2 10/11/16 < 1B1 MW-PB-3 02/02/16 < 195 MW-PB-3 04/25/16 < 191 < B.5 < 0.5 < 0.6 2.2 +/- 0.9 1.3 +/- 1 16 +/- 11 MW-PB-3 07/26/16 < 171 MW-PB-3 10/11/16 < 1B1 MW-PB-4 02/02/16 241 +/- 131 MW-PB-4 02/02/16 < 200 MW-PB-4 04/26/16 < 192 <60 < 06 < 3.7 (1) < 0.8 9.1 +/- 1.7 < 1.6 MW-PB-4 07/27/16 211 +/- 114 MW-PB-4 10/11/16 TBE < 1B1 MW-PB-4 10/11/16 TBE < 1B3 MW-PB-4 10/11/16 EIML 243 +/- BB MW-PB-5 04/25/16 < 194 MW-PB-6 04/25/16 < 194 MW-PB-7 02/03/16 < 194 MW-PB-7 04/25/16 TBE < 177 <44 < 04 < 2.2 < O.B 10.0 +/- 1.7 < 16 MW-PB-7 04/25/16 TBE < 191 < 79 < 06 < 2.3 < 0.8 10.9 +/- 1.7 < 16 MW-PB-7 04/25/16 EIML < 147 < 0.9 < 05 1.5 +/- 1.1 (2) 5.1 +/- O.B (2)

MW-PB-7 07/25/16 < 166 MW-PB-7 10/12/16 < 184 MW-PB-B 02/03/16 < 179 MW-PB-B 04/26/16 < 195 < 94 < 04 < 2.3 1.9 +/- 0.9 23.5 +/- 2.1 < 1.6 MW-PB-B 07/25/16 < 16B MW-PB-B 10/12/16 < 1B1 MW-PB-10 02/03/16 < 193 MW-PB-10 04/25/16 < 192 < 4.4 < 0.5 < 6.6 (1) 6.4 +/- 2.2 9.9 +/- 4.2 7B +/- 2B MW-PB-10 07/25/16 < 165 MW-PB-10 10/12/16 < 1BO MW-PB-11 02/02/16 < 196 MW-PB-11 04/25/16 < 192 < 6.6 < 0.4 < 4.4 (1) 13.9 +/- 3.2 6.7 +/- 3.2 12 1 +/- 5 4 MW-PB-11 07/27/16 < 171 MW-PB-11 10/11/16 < 1B2 MW-PB-12 02/02/16 < 194 MW-PB-12 04/27/16 < 191 < 5.2 < 0.5 < 1.0 < O.B 1.2 +/- 0.7 < 1.6 MW-PB-12 07/27/16 TBE 250 +/- 112 MW-PB-12 07/27/16 TBE- Orig 220 +/- 113 MW-PB-12 07/27/16 TBE - R1 1B1 +/- 10B MW-PB-12 07/27/16 EIML < 150 MW-PB-12 11/30/16 245 +/- 12B MW-PB-13 02/02/16 24B +/- 12B MW-PB-13 04/25/16 < 192 < 5.1 < 07 14 6 +/- 6.4 < 4.0 27 3 +/- 7.B < 36 MW-PB-13 07/26/16 < 169 MW-PB-13 10/11/16 < 185 MW-PB-14 04/26/16 < 195 MW-PB-15 02/03/16 < 1B1 MW-PB-15 04/25/16 < 193 < 4.0 < 05 < 15 < 09 BB+/- 1.2 < 1.6 MW-PB-15 07/25/16 < 167 MW-PB-15 10/12/16 < 1B4 MW-PB-16 02/03/16 < 17B B-1

TABLE B-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER AND SEEP SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RES ULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

MW-PB-16 04/25/16 < 194 < 51 < 06 3.5 +/- 1.1 1.8 +/- 0.9 8.3 +/- 1 0 < 16 MW-PB-16 07/25/16 Original 180 +/- 111 MW-PB-16 07/25/16 Recount < 173 MW-PB-16 10/12/16 < 183 MW-PB-19 02/02/16 < 196 MW-PB-19 04/25/16 < 189 < 33 < 04 < 1.0 3.0 +/- 1.2 2.9 +/- 0.7 4.0 +/- 1 3 MW-PB-19 07/26/16 < 167 MW-PB-19 08/27/16 < 178 MW-PB-19 10/11/16 TBE < 179 MW-PB-19 10/11/16 TBE < 182 MW-PB-19 10/11/16 EIML < 181 MW-PB-20 02/02/16 < 195 MW-PB-20 04/25/16 < 194 < 4.5 < 07 < 5.5 (1) < 09 11 .3 +/- 2 0 < 1.6 MW-PB-20 07/27/16 < 162 MW-PB-20 10/11/16 < 182 MW-PB-21 02/02/16 < 198 MW-PB-21 04/26/16 < 192 < 9.7 < 09 < 4.7 (1) < 0.9 50 7 +/- 3.0 < 1.6 MW-PB-21 07/27/16 < 161 MW-PB-21 10/11/16 < 181 MW-PB-22 02/02/16 507 +/- 143 MW-PB-22 04/26/16 581 +/- 136 < 6.4 < 0.6 < 1.3 < 0.9 3.5 +/- 0 9 < 16 MW-PB-22 07/27/16 TBE 745 +/- 136 MW-PB-22 07/27/16 TBE 702 +/- 133 MW-PB-22 07/27/16 EIML 733 +/- 106 MW-PB-22 10/11/16 429 +/- 133 MW-PB-24 02/02/16 < 200 MW-PB-24 03/03/16 232 +/- 130 MW-PB-24 03/29/16 229 +/- 109 MW-PB-24 04/05/16 186 +/- 115 MW-PB-24 04/12/16 255 +/- 125 MW-PB-24 04/19/16 < 192 MW-PB-24 04/26/16 305 +/- 114 < 6.3 < 04 < 21 < 11 5 3 +/- 1.2 < 17 MW-PB-24 05/02/16 250 +/- 125 MW-PB-24 05/11/16 Original 1010 +/- 173 MW-PB-24 05/11/16 Recount 833 +/- 152 MW-PB-24 05/11/16 Rerun 800 +/- 149 MW-PB-24 05/17/16 567 +/- 134 MW-PB-24 05/25/16 592 +/- 141 MW-PB-24 06/01/16 1060 +/- 175 MW-PB-24 06/08/16 1320 +/- 197 MW-PB-24 06/15/16 1010 +/- 173 MW-PB-24 06/22/16 275 +/- 121 MW-PB-24 06/29/16 285 +/- 131 MW-PB-24 07/06/16 Original 1180 +/- 188 MW-PB-24 07/06/16 Rerun 1260 +/- 198 MW-PB-24 07/12/16 1000 +/- 173 MW-PB-24 07/19/16 344 +/- 124 MW-PB-24 07/27/16 893 +/- 163 MW-PB-24 08/04/16 Original 1910 +/- 245 MW-PB-24 08/04/16 Rerun 1690 +/- 229 MW-PB-24 08/09/16 1680 +/- 229 MW-PB-24 08/16/16 1700 +/- 234 MW-PB-24 08/23/16 Original 3180 +/- 373 MW-PB-24 08/23/16 Recount 3040 +/- 356 MW-PB-24 08/23/16 Rerun 3270 +/- 378 8-2

TABLE B-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER AND SEEP SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A(Dis) Gr-A (Sus) Gr-B (Dis) Gr-B (Sus)

MW-PB-24 08/27/16 2190 +/- 278 MW-PB-24 09/07/16 1230 +/- 183 MW-PB-24 09/13/16 1180 +/- 183 MW-PB-24 09/20/16 Original 260 +/- 118 MW-PB-24 09/20/16 Recount 307 +/- 114 MW-PB-24 09/20/16 Rerun 283 +/- 113 MW-PB-24 09/27/16 539 +/- 129 MW-PB-24 10/10/16 362 +/- 132 MW-PB-24 11/14/16 382 +/- 139 MW-PB-24 11/30/16 246 +/- 121 MW-PB-25 02/02/16 8890 +/- 946 MW-PB-25 03/03/16 9130 +/- 975 MW-PB-25 03/29/16 9410 +/- 987 MW-PB-25 04/05/16 11000 +/- 1150 MW-PB-25 04/12/16 10000 +/- 1050 MW-PB-25 04/19/16 8970 +/- 951 MW-PB-25 04/26/16 7560 +/- 809 < 37 < 0.4 < 1.1 < 11 11 .5 +/- 1 0 < 1.7 MW-PB-25 05/02/16 10900 +/- 1150 MW-PB-25 05/11/16 10000 +/- 1060 MW-PB-25 05/17/16 8030 +/- 854 MW-PB-25 05/25/16 10400 +/- 1100 MW-PB-25 06/01/16 7940 +/- 847 MW-PB-25 06/08/16 7050 +/- 757 MW-PB-25 06/15/16 6760 +/- 734 MW-PB-25 06/22/16 7060 +/- 758 MW-PB-25 06/29/16 8300 +/- 889 MW-PB-25 07/06/16 7330 +/- 789 MW-PB-25 07/12/16 8360 +/- 889 MW-PB-25 07/19/16 5330 +/- 587 MW-PB-25 07/27/16 7690 +/- 827 MW-PB-25 08104/16 Original 3740 +/- 426 MW-PB-25 08/04/16 Rerun 3970 +/- 451 MW-PB-25 08/09/16 7130 +/- 765 MW-PB-25 08/16/16 7590 +/- 815 MW-PB-25 08/23/16 Original 7480 +/- 799 MW-PB-25 08/23/16 Recount 8090 +/- 855 MW-PB-25 08/23/16 Rerun 7310 +/- 778 MW-PB-25 08/27/16 7610 +/- 815 MW-PB-25 09/07/16 4420 +/- 490 MW-PB-25 09/13/16 3870 +/- 442 MW-PB-25 09/20/16 Original 8880 +/- 934 MW-PB-25 09/20/16 Rerun 7700 +/- 819 MW-PB-25 09/27/16 4240 +/- 471 MW-PB-25 10/10/16 5930 +/- 664 MW-PB-25 11/14/16 9010 +/- 955 MW-PB-25 11/30/16 5150 +/- 562 MW-PB-26 02/02/16 247 +/- 134 MW-PB-26 03/03/16 299 +/- 134 MW-PB-26 03/29/16 266 +/- 112 MW-PB-26 04/05/16 262 +/- 117 MW-PB-26 04/12/16 211 +/- 124 MW-PB-26 04/19/16 295 +/- 130 MW-PB-26 04/26/16 TBE 367 +/- 119 < 75 <05 1.9 +/- 1.0 1.3 +/- 0.7 5.4 +/- 0.9 < 1.6 MW-PB-26 04/26/16 TBE 401 +/- 119 < 68 < 06 1.6 +/- 0.8 < 0.8 3.8 +/- 0.9 < 16 MW-PB-26 04/26/16 EIML 328 +/- 93 < 10 < 0.6 3.9 +/- 0.9 (2) 2.6 +/- 0.6 (2)

B-3

TABLE B*l.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER AND SEEP SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis} Gr-A (Sus) Gr-B(Dis} Gr-B (Sus}

MW-PB-26 05/02/16 214 +/- 124 MW-PB-26 05111/16 296 +/- 131 MW-PB-26 05117/16 261 +/- 120 MW-PB-26 05125/16 < 194 MW-PB-26 06101/16 < 179 MW-PB-26 06/08/16 < 176 MW-PB-26 06/15/16 205 +/- 118 MW-PB-26 06/22/16 < 175 MW-PB-26 06/29/16 < 190 MW-PB-26 07/06/16 Original 221 +/- 125 MW-PB-26 07106/16 Rerun 369 +/- 133 MW-PB-26 07/12/16 253 +/- 126 MW-PB-26 07/19/16 < 177 MW-PB-26 07/27/16 < 176 MW-PB-26 08/04/16 < 172 MW-PB-26 08109/16 < 167 MW-PB-26 08/16/16 < 179 MW-PB-26 08123/16 187 +/- 118 MW-PB-26 09107/16 273 +/- 118 MW-PB-26 09113/16 189 +/- 111 MW-PB-26 09120116 191 +/- 114 MW-PB-26 09127/16 < 167 MW-PB-26 10/10/16 208 +/- 132 MW-PB-26 11/14/16 227 +/- 133 MW-PB-26 11130/16 345 +/- 129 MW-PB-27 02/02116 836 +/- 162 MW-PB-27 02102/16 792 +/- 159 MW-PB-27 03/03116 1280 +/- 202 MW-PB-27 03/29116 1100 +/- 170 MW-PB-27 04/05116 959 +/- 167 MW-PB-27 04112/16 1050 +/- 174 MW-PB-27 04119/16 1460 +/- 218 MW-PB-27 04126/16 1830 +/- 245 < 5.5 < 08 2.6+/-1 .0 <04 51 +/- 09 < 1.6 MW-PB-27 05102/16 1250 +/- 205 MW-PB-27 05/11/16 1230 +/- 193 MW-PB-27 05/17/16 1380 +/- 202 MW-PB-27 05/25/16 1260 +/- 201 MW-PB-27 06/01/16 1350 +/- 200 MW-PB-27 06108/16 1520 +/- 215 MW-PB-27 06/15116 1250 +/- 195 MW-PB-27 06122/16 1380 +/- 200 MW-PB-27 06/29116 1180 +/- 192 MW-PB-27 07/06/16 1210 +/- 190 MW-PB-27 07/12/16 1060 +/- 176 MW-PB-27 07/19116 1080 +/- 177 MW-PB-27 07127116 980 +/- 170 MW-PB-27 08/04/16 903 +/- 153 MW-PB-27 08109/16 935 +/- 159 MW-PB-27 08/16/16 1060 +/- 176 MW-PB-27 08/23116 922 +/- 159 MW-PB-27 09107/16 829 +/- 382 MW-PB-27 09/13/16 743 +/- 142 MW-PB-27 09/20/16 1120 +/- 176 MW-PB-27 09/27116 621 +/- 134 MW-PB-27 10/10/16 1270 +/- 212 B-4

TABLE B-1.1 CONCENTRATIONS OF TRITIUM, STRONTIUM, GROSS ALPHA AND GROSS BETA IN GROUNDWATER AND SEEP SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PC I/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 Sr-89 Sr-90 Gr-A (Dis) Gr-A(Sus) Gr-B (Dis) Gr-B (Sus)

MW-PB-27 11/14/16 712 +/- 153 MW-PB-27 11/30/16 892 +/- 192 MW-PB-28 02/02/16 < 192 MW-PB-28 04/25/16 < 176 < 7.5 < 05 < 1.0 2.8 +/- 1 1 4 7 +/- 0.8 36 +/- 1.4 MW-PB-28 07/26/16 < 168 MW-PB-28 08127/16 < 179 MW-PB-28 10/11/16 < 184 MW-PB-29 02/02/16 203 +/- 126 MW-PB-29 04/27/16 373 +/- 125 < 3.3 <04 < 0.8 < 04 2 6 +/- 0.6 < 16 MW-PB-29 07/27/16 337 +/- 115 MW-PB-29 10/11/16 294 +/- 133 MW-PB-29 11/30/16 445 +/- 136 MW-PB-30 02/02/16 < 191 MW-PB-30 04/27/16 696 +/- 143 < 63 < 0.6 < 0.7 20 +/-09 2.8 +/- 0 7 2 1 +/- 1.2 MW-PB-30 07/27/16 220 +/- 111 MW-PB-30 10/11/16 196 +/- 119 MW-PB-30 11/30/16 264 +/- 130 MW-PB-31 02/02/16 < 194 MW-PB-31 02/02/16 187 +/- 120 MW-PB-31 04/27/16 < 177 < 66 < 0.7 < 1.1 <08 21 +/-09 < 1.6 MW-PB-31 07/26/16 213 +/- 111 MW-PB-31 10/11/16 < 181 MW-PB-31 11/30/16 212 +/- 127 SP-PB-1 02/02/16 < 179 SP-PB-1 04/25/16 < 178 SP-PB-1 07/25/16 < 165 SP-PB-1 10/11/16 < 180 SP-PB-2 02/02/16 < 196 SP-PB-2 04/25/16 < 178 SP-PB-2 07/26/16 < 164 SP-PB-2 10/11/16 < 180 SP-PB-3 02/02/16 < 180 SP-PB-3 04/26/16 < 178 SP-PB-3 07/25/16 < 164 U/2YARD DRAIN 01/22/16 Rerun 1 < 199 U/2 YARD DRAIN 01/22/16 Rerun 2 < 196 U/2 YARD DRAIN 04/19/16 < 180 U/2 YARD DRAIN 07/11/16 < 176 U/2 YARD DRAIN 12/19/16 < 183 U/3 YARD DRAIN 02/02/16 Rerun 1 618 +/- 148 U/3 YARD DRAIN 02/02/16 Rerun 2 605 +/- 148 U/3 YARD DRAIN 03/11/16 217 +/- 129 U/3 YARD DRAIN 03/11/16 Recount 220 +/- 131 U/3 YARD DRAIN 04/26/16 < 178 < 5.8 < 0.6 < 1.1 < 0.8 2.5 +/- 0.9 < 1.6 U/3 YARD DRAIN 07/27/16 < 164 U/3 YARD DRAIN 12/19/16 < 182 (1) See program exceptions section for explanation (2) Total Gross Alpha/Total Gross Beta reported B-5

TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER AND SEEP WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 MW-PB-1 04/26/16 TBE < 6 < 5 < 12 < 8 < 9 < 5 < 8 < 14 < 7 < 6 < 35 < 10 MW-PB-1 04/26/16 TBE < 4 < 4 < 8 < 4 < 7 < 4 < 7 < 9 < 4 < 4 < 23 < 8 MW-PB-1 04/26/16 EIML < 3 < 2 < 4 < 2 < 4 < 2 < 3 < 6 < 3 < 2 < 16 < 4 MW-PB-2 04/25/16 < 6 < 6 < 12 < 6 < 9 < 7 < 11 < 11 < 7 < 6 < 31 < 11 MW-PB-3 04/25/16 < 5 < 5 < 12 < 5 < 10 < 5 < 8 < 11 < 5 < 5 < 27 < 8 MW-PB-4 04/26/16 < 7 < 8 < 13 < 9 < 17 < 9 < 14 < 13 < 7 < 8 < 34 < 11 MW-PB-5 04/25/16 < 5 < 5 < 10 < 6 < 11 < 5 < 10 < 12 < 5 < 5 < 30 < 11 MW-PB-6 04/25/16 < 5 < 7 < 13 < 6 < 12 < 7 < 12 < 14 < 6 < 7 < 31 < 12 MW-PB-7 04/25/16 TBE < 3 < 3 < 7 < 4 < 6 < 4 < 6 < 9 < 3 < 3 < 19 < 7 MW-PB-7 04/25/16 TBE < 5 < 5 < 10 < 6 < 11 < 6 < 9 < 12 < 4 < 5 < 27 < 11 MW-PB-7 04/25/16 EIML < 3 < 2 < 5 < 2 < 4 < 3 < 2 < 7 < 2 < 3 < 17 < 2 MW-PB-8 02/03/16 < 5 < 6 < 10 < 7 < 14 < 6 < 15 < 12 < 6 < 4 < 33 < 15 MW-PB-8 04/26/16 < 5 < 6 < 12 < 6 < 12 < 7 < 9 < 12 < 6 < 6 < 40 < 11 MW-PB-8 07/25/16 < 4 < 3 < 10 < 4 < 7 < 4 < 8 < 13 < 3 < 4 < 27 < 8 OJ 9 7 < 11 16 < 13 < 9 9 < 36 < 14 I MW-PB-8 10/12/16 < 9 < < 16 < < 18 < <

O>

MW-PB-10 02/03/16 < 5 < 6 < 12 < 6 < 13 < 7 < 11 < 15 < 6 < 6 < 38 < 11 MW-PB-10 04/25/16 < 5 < 6 < 11 < 6 < 7 < 7 < 10 < 15 < 7 < 5 < 42 < 15 MW-PB-10 07/25/16 < 4 < 4 < 11 < 4 < 8 < 5 < 8 < 15 < 4 < 4 < 31 < 11 MW-PB-10 10/12/16 < 6 < 5 < 10 < 5 < 13 < 8 < 11 < 11 < 8 < 6 < 27 < 7 MW-PB-11 04/25/16 < 5 < 5 < 9 < 7 < 11 < 6 < 11 < 13 < 6 < 7 < 32 < 9 MW-PB-12 04/27/16 < 8 < 8 < 15 < 8 < 12 < 9 < 11 < 13 < 8 < 7 < 32 < 8 MW-PB-13 04/25/16 < 6 < 7 < 13 < 6 < 13 < 7 < 12 < 14 < 6 < 7 < 35 < 13 MW-PB-14 04/26/16 < 7 < 5 < 15 < 7 < 12 < 7 < 14 < 14 < 6 < 8 < 36 < 13 MW-PB-15 02/03/16 < 6 < 6 < 13 < 8 < 12 < 8 < 10 < 15 < 6 < 6 < 38 < 13 MW-PB-15 04/25/16 < 5 < 5 < 10 < 5 < 12 < 6 < 8 < 13 < 5 < 6 < 32 < 10 MW-PB-15 07/25/16 < 3 < 4 < 7 < 3 < 6 < 4 < 6 < 11 < 3 < 3 < 24 < 8 MW-PB-15 10/12116 < 6 < 8 < 13 < 9 < 15 < 11 < 15 < 15 < 7 < 7 < 42 < 13 MW-PB-16 02/03/16 < 4 < 3 < 8 < 3 < 6 < 4 < 8 < 14 < 4 < 4 < 28 < 11 MW-PB-16 04/25/16 < 6 < 6 < 12 < 6 < 11 < 7 < 11 < 12 < 6 < 6 < 29 < 11 MW-PB-16 07/25/16 < 3 < 4 < 9 < 3 < 7 < 4 < 7 < 12 < 3 < 4 < 27 < 10 MW-PB-16 10/12/16 < 6 < 6 < 13 < 7 < 16 < 9 < 11 < 10 < 6 < 7 < 33 < 12 MW-PB-19 04/25/16 < 5 < 5 < 11 < 3 < 11 < 5 < 9 < 13 < 5 < 6 < 35 < 8 MW-PB-20 04/25/16 < 4 < 6 < 13 < 10 < 12 < 5 < 8 < 13 < 5 < 6 < 35 < 6 MW-PB-21 04/26/16 < 6 < 7 < 11 < 7 < 11 < 6 < 13 < 13 < 6 < 6 < 35 < 10 MW-PB-22 04/26/16 < 5 < 5 < 11 < 6 < 11 < 6 < 9 < 12 < 5 < 6 < 31 < 8 MW-PB-24 04/26/16 < 8 < 6 < 12 < 5 < 9 < 7 < 14 < 14 < 6 < 7 < 41 < 12 MW-PB-24 10/10/16 < 5 < 6 < 11 < 5 < 10 < 6 < 9 < 10 < 5 < 5 < 28 < 8 MW-PB-25 04/26/16 < 6 < 6 < 11 < 8 < 10 < 6 < 10 < 12 < 5 < 6 < 30 < 14 MW-PB-25 10/10/16 < 8 < 6 < 16 < 7 < 16 < 6 < 15 < 14 < 6 < 9 < 35 < 8

TABLE B-1.2 CONCENTRATIONS OF GAMMA EMITTERS IN GROUNDWATER AND SEEP WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 MW-PB-26 04126116 TBE < 5 < 5 < 10 < 6 < 9 < 5 < 10 < 12 < 5 < 5 < 24 < 9 MW-PB-26 04126116 TBE < 3 < 3 < 8 < 4 < 7 < 4 < 6 < 9 < 4 < 4 < 21 < 6 MW-PB-26 04126116 EIML < 2 < 2 < 4 < 3 < 4 < 3 < 5 < 4 < 3 < 2 < 12 < 4 MW-PB-26 10110116 < 5 < 6 < 10 < 5 < 11 < 5 < 8 < 10 < 5 < 6 < 24 < 7 MW-PB-27 04126/16 < 4 < 4 < 10 < 5 < 10 < 7 < 8 < 12 < 5 < 5 < 30 < B MW-PB-27 10110116 < 6 < 7 < 15 < 7 < 12 < 10 < 11 < 13 < 7 < 7 < 38 < 11 MW-PB-28 04125116 < 5 < 5 < 10 < 5 < 11 < 5 < 7 < 12 < 5 < 5 < 26 < 9 MW-PB-29 04127116 < 7 < 7 < 19 < 6 < 17 < 8 < 14 < 14 < 7 < 8 < 36 < 10 MW-PB-30 04127116 < 6 < 6 < 12 < 7 < 12 < 7 < 10 < 13 < 6 < 6 < 35 < 12 MW-PB-31 04127116 < 4 < 5 < 11 < 5 < 10 < 6 < 9 < 11 < 4 < 5 < 27 < 9 SP-PB-1 04/25116 < 3 < 4 < B < 3 < 6 < 4 < 7 < 11 < 3 < 4 < 27 < 5 SP-PB-2 04125116 < 4 < 5 < 10 < 4 < 10 < 5 < 9 < 12 < 5 < 6 < 29 < 9 SP-PB-3 04126116 < 4 < 5 < 9 < 5 < 11 < 5 < 9 < 12 < 4 < 5 < 27 < 8 DJ Ul2 YARD DRAIN 04119116 < 12 < 7 < B < 7 I

--.J Ul3 YARD DRAIN 04126116 < 3 < 3 < 7 < 3 < 5 < 4 < 6 < 8 < 3 < 3 < 18 < 6

• Unable to reach client-required detection limit due to age of sample at time of analysis

TABLE B-1.3 CONCENTRATIONS OF HARD-TO-DETECTS IN GROUNDWATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE Am-241 Cm-242 Cm-243/244 Pu-238 Pu-239/240 U-234 U-235 U-238 Fe-55 Ni-63 MW-PB-2 04/25/16 < 0.19 < 0.04 < 0.13 < 0.03 < 0.06 2.99 +/- 0.54 < 0.03 2.11 +/- 0.44 MW-PB-3 04/25/16 < 0.16 < 0.08 < 0.04 < 0.04 < 0.16 1.09 +/- 0.27 < 0.07 0.70 +/- 0.21 MW-PB-4 04/26/16 < 0.02 < 0.02 < 0.02 < 0.04 < 0.13 < 0.04 < 0.03 < 0.08 < 115 < 4.1 MW-PB-7 TBE 04/25/16 (1) < 0.32 < 0.10 < 0.10 < 0.04 < 0.18 < 0.05 < 0.12 < 0.03 MW-PB-7 TBE 04/25/16 < 0.16 < 0.03 < 0.15 < 0.07 < 0.07 < 0.06 < 0.07 < 0.15 MW-PB-7 EIML 04/25/16 < 0.05 < 0.05 < 0.10 < 0.25 < 0.09 < 0.05 MW-PB-8 04/26/16 < 0.14 < 0.05 < 0.12 < 0.05 < 0.07 < 0.06 < 0.08 < 0.06 MW-PB-10 04/25/16 < 0.05 < 0.04 < 0.04 < 0.06 < 0.03 < 0.02 < 0.03 < 0.07 MW-PB-11 04/25/16 < 0.09 < 0.17 < 0.09 < 0.11 < 0.15 < 0.08 < 0.06 < 0.09 MW-PB-12 04/27/16 (1) < 0.29 < 0.29 < 0.29 < 0.08 < 0.18 < 0.06 < 0.15 < 0.18 < 154 < 4.1 MW-PB-13 04/25/16 (1) < 0.21 < 0.06 < 0.06 < 0.09 < 0.13 15.07 +/- 2.60 0.45 +/- 0.19 13.71 +/- 2.38 MW-PB-15 04/25/16 < 0.20 < 0.08 < 0.19 < 0.17 < 0.14 < 0.13 < 0.05 < 0.12 MW-PB-16 04/25/16 < 0.10 < 0.03 < 0.15 < 0.12 < 0.10 < 0.10 < 0.03 < 0.14 Ill I

MW-PB-19 04/25/16 (1) < 0.21 < 0.21 < 0.21 < 0.05 < 0.13 0.22 +/- 0.13 < 0.08 0.21 +/- 0.14 00 MW-PB-20 04/25/16 < 0.10 < 0.02 < 0.02 < 0.14 < 0.06 < 0.06 < 0.12 < 0.10 < 134 < 4.0 MW-PB-21 04/26/16 < 0.03 < 0.07 < 0.03 < 0.03 < 0.10 < 0.14 < 0.20 < 0.16 < 138 < 4.1 MW-PB-22 04/26/16 < 0.04 < 0.04 < 0.04 < 0.03 < 0.09 < 0.17 < 0.19 < 0.16 < 161 < 4.2 MW-PB-24 04/26/16 < 0.03 < 0.03 < 0.03 < 0.03 < 0.09 < 0.10 < 0.09 < 0.13 < 141 < 4.1 MW-PB-25 04/26/16 < 0.12 < 0.02 < 0.09 < 0.03 < 0.11 1.54 +/- 0.39 < 0.04 0.50 +/- 0.21 < 100 < 4.1 MW-PB-26 TBE 04/26/16 < 0.09 < 0.04 < 0.07 < 0.02 < 0.06 4.22 +/- 0.62 < 0.03 1.71 +/- 0.37 < 169 < 4.1 MW-PB-26 TBE 04/26/16 < 0.05 < 0.02 < 0.02 < 0.03 < 0.05 4.82 +/- 0.67 < 0.11 2.20 +/- 0.42 < 127 < 4.2 MW-PB-26 EIML 04/26/16 < 0.10 < 0.07 < 0.24 < 0.58 4.53 +/- 0.45 2.08 +/- 0.30 MW-PB-27 04/26/16 < 0.11 < 0.06 < 0.06 < 0.03 < 0.08 5.00 +/- 1.06 < 0.07 3.35 +/- 0.82 < 144 < 4.2 MW-PB-28 04/25/16 < 0.11 < 0.07 < 0.11 < 0.02 < 0.06 < 0.08 < 0.14 < 0.12 MW-PB-29 04/27/16 (1) < 0.22 < 0.22 < 0.22 < 0.05 < 0.02 < 0.12 < 0.12 < 0.12 MW-PB-30 04/27/16 < 0.03 < 0.07 < 0.05 < 0.05 < 0.08 < 0.08 < 0.12 < 0.08 MW-PB-31 04/27/16 < 0.06 < 0.02 < 0.09 < 0.04 < 0.08 < 0.02 < 0.09 < 0.02 U/3 YARD DRAIN 04/26/16 < 0.07 < 0.06 < 0.07 < 0.05 < 0.09 < 0.13 < 0.12 < 0.09 (1) See program exceptions section for explanation

TABLE B-11.1 CONCENTRATIONS OF TRITIUM IN SURFACE WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE H-3 SW-PB-1 02/01/16 < 191 SW-PB-1 02/02/16 < 191 SW-PB-1 04/26/16 < 176 SW-PB-1 07/27/16 < 162 SW-PB-1 10/11116 < 184 SW-PB-1 10/11/16 < 181 SW-PB-5 02/01/16 < 193 SW-PB-5 04/26/16 < 180 SW-PB-5 07/27/16 < 161 SW-PB-5 10/11/16 < 183 SW-PB-6 02/01/16 < 193 SW-PB-6 TBE 04/26/16 < 180 SW-PB-6 TBE 04/26/16 < 179 SW-PB-6 EIML 04/26/16 < 147 SW-PB-6 07/27/16 < 162 SW-PB-6 07/27/16 < 165 SW-PB-6 10/11/16 < 181 B-9

TABLE B-11.2 CONCENTRATIONS OF GAMMA EMITIERS IN SURFACE WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER +/- 2 SIGMA COLLECTION SITE DATE Mn-54 Co-58 Fe-59 Co-60 Zn-65 Nb-95 Zr-95 1-131 Cs-134 Cs-137 Ba-140 La-140 SW-PB-1 04/26/16 < 3 < 3 < 5 < 2 < 5 < 3 < 5 < 8 < 3 < 3 < 18 <4 SW-PB-5 04/26/16 < 3 < 3 < 7 <4 <6 < 3 <6 < 7 < 3 < 3 < 17 < 5 SW-PB-6 04/26/16 TBE < 4 < 3 < 9 < 4 < 8 <4 < 7 < 9 < 3 <4 < 24 < 8 SW-PB-6 04/26/16 TBE < 3 <4 < 9 <4 < 7 <4 <6 < 8 < 3 <4 < 21 < 5 SW-PB-6 04/26/16 EIML < 2 < 3 < 3 < 2 < 6 < 2 < 3 < 7 < 3 < 3 < 17 <4 CD I

0

TABLE B-111.1 CONCENTRATIONS OF TRITIUM IN PRECIPITATION WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER + 2 SIGMA COLLECTION SITE DATE H-3 1A 01/28/16 < 182 1A 02/25/16 < 172 1A 03/31/16 < 187 1A 04/28/16 < 182 1A 06/02/16 < 163 1A 06/30/16 < 175 1A 07/28/16 < 168 1A 09/01/16 < 173 1A 09/29/16 < 181 1A 10/27/16 < 189 1A 12/01/16 < 191 1A 12/29/16 < 193 18 01/28/16 < 184 1B 02/25/16 < 172 18 03/31/16 < 177 18 04/28/16 < 182 18 06/02/16 < 162 18 06/30/16 < 181 18 07/28/16 < 164 18 09/01/16 < 172 18 09/29/16 < 178 18 10/27/16 < 189 18 12/01/16 < 191 18 12/29/16 < 193 18 01/28/16 < 175 18 02/25/16 < 176 18 03/31/16 < 179 18 04/28/16 < 184 18 06/02/16 < 190 18 06/30/16 < 182 18 07/28/16 < 166 18 09/01/16 < 176 18 09/29/16 < 183 18 10/27/16 < 189 18 12/01/16 < 195 18 12129/16 < 193 1SSE 01/28/16 < 183 1SSE 02/25/16 < 178 1SSE 03/31/16 < 182 1SSE 04/28/16 < 183 1SSE 06/02/16 < 164 1SSE 06/30/16 < 181 1SSE 07/28/16 < 168 1SSE 09/01/16 < 175 1SSE 09/29/16 < 181 1SSE 10/27/16 < 190 1SSE 12/01/16 < 195 1SSE 12/29/16 < 196 1Z 01/28/16 < 183 1Z 02/25/16 < 176 1Z 03/31/16 < 181 B-11

TABLE B-111.1 CONCENTRATIONS OF TRITIUM IN PRECIPITATION WATER SAMPLES COLLECTED AS PART OF THE RADIOLOGICAL GROUNDWATER PROTECTION PROGRAM, PEACH BOTTOM ATOMIC POWER STATION, 2016 RESULTS IN UNITS OF PCl/LITER + 2 SIGMA COLLECTION SITE DATE H-3 1Z 04/28/16 < 179 1Z 06/02/16 < 164 1Z 06/30/16 < 178 1Z 07/28/16 < 168 1Z 09/01/16 < 174 1Z 09/29/16 < 182 1Z 10/27/16 < 191 1Z 12101116 < 197 1Z 12/29/16 < 195 4M 01/28/16 < 186 4M 02/25/16 < 176 4M 03/31/16 < 180 4M 04/28/16 < 183 4M 06/02/16 < 164 4M 06/30/16 < 180 4M 07/28/16 < 167 4M 09/01/16 < 173 4M 09/29/16 < 183 4M 10/27/16 < 182 4M 12/01/16 < 189 4M 12/29/16 195 B-12

Appendix D Estimated Mass Flux of Tritiated Groundwater to the Conowingo Reservoir and Rock Run Creek (On CD)

GHD I Hydrogeologic Investigation Report 111137316 (1)

GHD I Hydrogeologic Investigation Report 111137316 (1)

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-30 Slot Size: 20 Material: PVC

~32 Sand Pack :

111 .94 to 89.9411 CD

\':l 3.00 to 25.00ft BGS en -34 Material: #1 SAND iii I-0

(!) ~36 Q.

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(!)

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: PEACH BOTTOM ATOMIC POWER STATION HOLE DESIGNATION: MW-PB-9 PROJECT NUMBER: 45136-27 DATE COMPLETED: May 1, 2006 CLIENT: EXELON GENERATION COMPANY, LLC DRILLING METHOD: 6.25" ID HSA LOCATION: DELTA, PENNSYLVANIA FIELD PERSONNEL: M. Mylet DEPTH ELEV. SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS ft Monitoring Well ft BGS ....I LU CD Cl:

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~12 ~

.._ 14 1 - 1 4 - - 2" PVC WELL

~16 SCREEN

~18 "1',-11--- SAND PACK D

~20 10009 SCHIST FRAGMENTS, AND SILT & SAND, BROWN (FILL)

'-22

, . . . _ 1 2" D BOREHOLE

'-24 1---U:-:-N:-::WEA::--=-:-=TH'""E=:R=--:E=:D=-=-sc=-H:-:-l:-=s=T...,,(F"'l:-LL-)------~8~(\ 96 *09 l----::-'.::--=--:-:-:::--:::-::-:::--:::-:-:--=--::-:7:-:-:-:-::--::-=-:-::::::::-----1'~ 95.09 SILT AND SAND (ML & SM) AND SCHIST

-26 FRAGMENTS (FILL)

-28

-30 f---=-=---=_,,....,,------..,,-,-----,-,,....-------"'O><..>q 90.09 END OF BOREHOLE @ 30.0ft BGS WELL DETAILS Screened interval

-32 TARGET DEPTH 110.09 to 90 0911 CD 10.00 to 30.0011 BGS

~ STRATIGRAPHIC DESCRIPTIONS BASED

-34 Length: 201t iii"' ON CUTTING RETURNS Diameter: 2in

>-- Slot Size: 20 0

(!) -36 Material: PVC a.

Q'. Sand Pack.

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: PEACH BOTIOM ATOMIC POWER STATION HOLE DESIGNATION: MW-PB-10 PROJECT NUMBER: 45136-27 DATE COMPLETED: May 2, 2006 CLIENT: EXELON GENERATION COMPANY, LLC DRILLING METHOD: 6.25" ID HSA LOCATION: DELTA, PENNSYLVANIA FIELD PERSONNEL: M. Mylet DEPTH ELEV SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS ft Monitoring Well ftBGS _J CD 0:: UJ

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~4 2"' PVC WELL CASING 111 07 WEATHERED SCHIST, BROWN (FILL)

~5 D

D 0

~8

~10 D

~12

~

~14

~ 0 WEATHERED SCHIST, BROWN, WITH 101.07 ~ 2" PVC WELL l~

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~16 LAYERS OF BLACK, DARK BROWN SILT (Ml) (FILL) 0

~ 18 ~

SAND PACK

~20 9607 WEATHERED SCHIST, BROWN 0

~22

'0 9307  : 14-12*

COMPETENT SCHIST, GRAY (BEDROCK) BOREHOLE

~24 0 91 07 END OF BOREHOLE@ 25.0ft BGS

-26 WELL DETAIL~

Screened interval:

TARGET DEPTH 111.07 to 91.07ft CD

-28 5.00 to 25.00ft BGS STRATIGRAPHIC DESCRIPTIONS BASED Length: 20ft ON CUTTING RETURNS Diameter: 2in

-30 Slot Size: 20 Material: PVC

-32 Sand Pack:

113.07 to 91.07ft CD

~ -34 3.00 to 25.00ft BGS Material: #1 SAND iii b

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: PEACH BOTIOM ATOMIC POWER STATION HOLE DESIGNATION: MW-PB-11 PROJECT NUMBER: 45136-27 DATE COMPLETED: May 8, 2006 CLIENT: EXELON GENERATION COMPANY, LLC DRILLING METHOD: 6.25" ID HSA LOCATION: DEL TA, PENNSYLVANIA FIELD PERSONNEL: M. Mylet DEPTH ELEV. SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS ft Monitoring Well

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BENTONITE

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~4 2" PVC WELL I-CASING 00

- ~

' -6

--I-

' -8 I-107.53 WEATHERED SCHIST, GRAY, BROWN

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I-

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fFILLl 0.0

~10 106.03 ~

I-

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SILT (ML). BROWN , GRAY (FILL) '>

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0.0

~

'-14 I-

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2" PVC WELL

'-16 SCREEN I-

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'-20 I-

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00

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~

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91 03 END OF BOREHOLE@ 25.0ft BGS

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-- TARGET DEPTH Screened interval:

111.03 to 91.0311 CD

-28 5.00 to 25.0011 BGS STRATIGRAPHIC DESCRIPTIONS BASED Length: 2011 ON CUTTING RETURNS Diameter: 2in

-30 Slot Size: 20 Material: PVC

~32 Sand Pack:

I- 113.03 to 91 .0311 CO I- 3.00 to 25.0011 BGS

~34 Material: #1 SAND

'-36 1'-38

~40

~42 8--' '-44 zw

@ NOTES. MEASURING POINT ELEVATIONS MAY CHANGE, REFER TO CURRENT ELEVATION TABLE OJ 0:: WATER FOUND ~

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: PEACH BOTTOM ATOMIC POWER STATION HOLE DESIGNATION: MW-PB-12 PROJECT NUMBER: 45136-27 DATE COMPLETED: May 5, 2006 CLIENT: EXELON GENERATION COMPANY, LLC DRILLING METHOD 6.25" ID HSA LOCATION: DELTA, PENNSYLVANIA FIELD PERSONNEL: M. Mylet DEPTH ELEV. SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS ft Monitoring Well ftBGS ...J CD 0::

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~

'-6 I-

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~

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0.0

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~16

~

I-0.0

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~20

~

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I I- SILT (ML), BROWN AND GRAVEL (GM)

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(FILL) 1 4 - 1 2" I-BOREHOLE

~24

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~30 2" PVC WELL I-I- SCREEN I-

~32 0.0 I-I-

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81 54 I- END OF BOREHOLE@ 35.0ft BGS

~36 WELL DETAIL§

~

Screened interval '

I-TARGET DEPTH 96.54 to 81 54ft CD l'-38 20.00 to 35 OOft BGS I-STRATIGRAPHIC DESCRIPTIONS BASED Length: 15ft ON CUTTING RETURNS Diameter 2m

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. I-

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1of1 PROJECT NAME: PEACH BOTIOM ATOMIC POWER STATION HOLE DESIGNATION: MW-PB-13 PROJECT NUMBER: 45136-27 DATE COMPLETED: May 9, 2006 CLIENT: EXELON GENERATION COMPANY, LLC DRILLING METHOD: 6.25" ID HSA LOCATION: DELTA, PENNSYLVANIA FIELD PERSONNEL: M. MyleU C. Pidge DEPTH ELEV. SAMPLE flBGS STRATIGRAPHIC DESCRIPTION & REMARKS fl Monitoring Well _J CD c:: ;g LlJ

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~2 CEMENT 129.80

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2" PVC WELL

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~

SCHIST, GRAY MORE WEATHERED, WET D

~10 t---.. IFILLl ~~ 123.30 WEATHERED SCHIST, GRAY (FILL) > 3

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~14

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~-- 2" PVC WELL SCHIST, GRAY MORE WEATHERED (FILL)

~16 D 8() SCREEN 0.0

~18 D ~X 115.30 ~ -.~1--- SAND PACK WEATHERED SCHIST, GRAY (FILL)

~20

~22 f 4 - 1 2" BOREHOLE

~24

-26

-28 1 - - - - - - - - - - - - - - - - - - - _ . . _ " ' " " " - " I 105.30 END OF BOREHOLE@ 28.0ft BGS WELL DETAILS Screened interval

-30 TARGET DEPTH 125.30 to 105 30ft CD 0.00 10 20 oon BGS

-32 STRATIGRAPHIC DESCRIPTIONS BASED Length: 20ft ON CUTIING RETURNS Diameter: 2in

~ Slot Size: 20

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1of1 PROJECT NAME: PEACH BOTTOM ATOMIC POWER STATION HOLE DESIGNATION: MW-PB-14 PROJECT NUMBER: 45136-27 DATE COMPLETED: May 2, 2006 CLIENT: EXELON GENERATION COMPANY, LLC DRILLING METHOD: 6.25" ID HSA LOCATION: DELTA, PENNSYLVANIA FIELD PERSONNEL: M. Mylet DEPTH ELEV. SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS ft Monitoring Well ftBGS ...J CD er ~

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BENTONITE CHIPS

'....-8 0

- '-10 2 110 39 2" PVC WELL CASING

'-12 WEATHERED SCHIST, BROWN, SOME MIXED LAYERS OF GRAY SILT AND SAND (FILL)

'....-14 0

- WEATHERED SCHIST, BROWN 105 39 1 - 1 4 - - 2" PVC WELL

~

SCREEN

'-16

~~

0

'-18 I-

'-20

- - - - SAND PACK raz 0

~

'-22

~12"

~

BOREHOLE

'-24

-26

-28

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~~

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~ STRATIGRAPHIC DESCRIPTIONS BASED

a"' -34 Length* 2011 ON CUTIING RETURNS Diameter. 2in

....0 Slot Size 20

(!) -36 Material

• PVC a.

Sand Pack 0

u"' 112.39 to 90.39ft CD

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~ '-40

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION : MW-PB-15 PROJECT NUMBER: 053539 DATE COMPLETED: October 20, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE flBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well flBGS _J a:

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-I-Asphalt Gravel (dolomite sub-base), with Silt, P"-; 1 °70

~~

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,___ Concrete

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' 1.60 I

~2 I- Clayey Silt, dark tan 1::7, I-

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~~- 2" PVC Well 1-4 Casing I-

~--C-la-y-ey-Si-lt-w-it_h_S_c-hi-st_fr_a_g_m_e_n-ts-.-d-ark-b-ro_w_n-----1-4~ 5*00 I-I-

1-6 with metallic gray I-I-

=14a-+-- 2" PVC Well I-

- wet at 7.511 BGS Screen

~8 I-I-

... ~Sand Pack I-1-10 10.00 I- Clayey Silt. with Schist fragments, dark brown I- with metallic gray I-

~12 I-1-14

~16 I-

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• 5.00 to 19.00ft BGS Length: 14ft

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-24 Seal:

2.00 to 4.00ft BGS Material Bentonite

~

0 Sand Pack.

~ 1-26 4.00 to 19 OOft BGS Material: #2 Sand il'.-28 0

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~ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __,

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 3 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-16 PROJECT NUMBER: 053539 DATE COMPLETED: October 17, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS ftBGS ..J 0::

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Asphalt Gravel (dolomite sub-base) <5-inches, dark 2 brown 17"1lit--- Bentonite Clayey Silt with Schist fragments, dark brown Grout with metallic gray 4

6

~a-- 6" Steel Casing 8 Clayey Silt with Sand, very fine to medium grained, black-dark gray

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~

0

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Schist, metallic gray with black 0.: 30 14---S"Open Ir Borehole 0

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 2 of3 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION : MW-PB-16 PROJECT NUMBER: 053539 DATE COMPLETED : October 17, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE llBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well llBGS 0:: --'

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- water bearing zone at 41 Oft BGS 42 44 Schist, metallic gray-black 46 48 50 1 4 - - - 6" 0pen Borehole 52 54 54.00 Water bearing zone, estimated sustainable yield 3 gallons per minute through lithologic transition from Schist to Slate 56 58 56.00 Slate. trace micaceous, black 60 62 64 66 68 70 72 74 74.00 c:> Slate, dark gray-black 0

z w

0 a: NOTES: MEASURING POINT ELEVATIONS MAY CHANGE; REFER TO CURRENT ELEVATION TABLE

J al a:

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 3 of3 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION : MW-PB-16 PROJECT NUMBER: 053539 DATE COMPLETED: October 17, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS ....J 0::

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0:: <..l 78 BO 82 84 86 88 ----B"Open Borehole 90 92 92.00 Slate, medium gray 94 96 98 100 102 104 1-------------------___..><...<...q 105.00 END OF BOREHOLE@ 105.0ft BGS 106 ESTIMATED YIELD 8+ gpm 108 110 112 NOTES: MEASURING POINT ELEVATIONS MAY CHANGE; REFER TO CURRENT ELEVATION TABLE

STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 3 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-17 PROJECT NUMBER: 053539 DATE COMPLETED: October 14, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well flBGS flBGS ...J 0:

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Asphalt Silt with Dolomite and Schist Gravels,

<5-inches, brown with dark gray-blue 2 W.llt-- Bentonite Grout 4

6 8 Clayey Silt with Schist fragments, <2-inches.  !'*-~- 6" Steel dark brown Casing 10 12 -Auger returns are wet at 12.0ft BGS Clayey Silt with Sand, very fine to coarse 14 grained, dark gray-black 16 18 Schist, highly weathered, decrease drill speed 20

- Schist, competent at 21. Oft BGS 22 24 26 28 Schist. metallic gray with brown, dry 30 ----6"0pen Schist, metallic gray Borehole

- Dust Suppression, no obvious water at 31.0ft BGS 32 34 35.00 Schist, metallic gray with trace rust-brown 36

STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 2 of 3 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION : MW-PB-17 PROJECT NUMBER: 053539 DATE COMPLETED : October 14, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C . Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS -'

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- Water Bearing Zone, trace somewhere between 40 and 45 ft BGS at 45.0ft BGS 46 ----S"Open Borehole 48 48.00 Schist, weathered, increased drill speed 50 50.00 52

- Water Bearing Zone, estimated yield <1gallon per minute at 53.0ft BGS 54 Schist, metallic gray 56 58 60 62 64 12 0

~ 66 f-D

(!)

Cl. 68 tr 0

~I tr 70 u

Cl. 71 00

(!) Schist, metallic gray z 72 - Schist, weathered, dark brown with metallic

~

en gray at 71ft BGS

"'"'0"' - Schist, weathered, dark brown with metallic

(!)

74 gray at 103ft BGS 0

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 3 of3 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION : MW-PB-17 PROJECT NUMBER: 053539 DATE COMPLETED: October 14, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS -'

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78 80 82 84 6" Open Borehole 86 88 90 92 94 96 98 100 102 103.00 fl"' 104 Schist. metallic gray S1

>-- 105.00 0

(!)

END OF BOREHOLE @ 1OS.Oft BGS 0.. 106 0

u, ESTIMATED YIELD <1 gpm

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108 u

110 112 g

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-18 PROJECT NUMBER: 053539 DATE COMPLETED: October 15, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C . Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS ...J 0::

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Asphalt 0.80

...A'- Concrete

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'-2

~---- Bentonite

~

3.50 ~*'----

~

2" PVC Well

~4 Clayey Silt with Schist fragments, daril brown ~~ Casing

.... with metallic gray

-,___ 6 Clayey Silt with Schist fragments, daril brown with metallic gray 5.00

-.... --loo...+--

-~0 2" PVC Well Screen

..~sandPack

,___ 10 Clayey Silt with Schist fragments, daril brown 10.00

-~12 with metallic gray

-~14 Clayey Silt with Schist fragments, daril brown 15.00

,___ 16 with metallic gray 17 00 Schist, highly weathered, decrease drill speed

~18 and grinding smooth

~20 , . ~

1-----_s_ch_is_t_.c_o_m_p_e_te_n_t_at_2_0_.o_tt_B_G_s_ _ _ _ _ _ _""""l'.l"'I 20 50 END OF BOREHOLE@ 20.Sft BGS WELL DETAILS

-22 Screened interval; 5.00 to 20.00ft BGS Length: 151t Diameter 21n

-24 Slot Size O 020 Material* PVC co

§ Seal :

~ -26 2.00 to 4.0ott BGS

,__ Material: Bentonite 0 Sand Pack.

(!)

0.. 4.00 to 20.50ft BGS

"' -28 0

u Material* #2 Sand I

<(

u ,___ 30

~

(!)

g._34 z

Wf-----'------------------------'----'------------'----'---'---'--'-----l 0

NOTES: MEASURING POINT ELEVATIONS MAY CHANGE* REFER TO CURRENT ELEVATION TABLE

J ID

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~'-----------------------------------------------------'

STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-19 PROJECT NUMBER: 05353g DATE COMPLETED: October 24, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS ...J c:: en LU CXl

~

c:: ~ :S:>-

oz

i; (.) ....J::i LU mO

i I- LU z c:: u

~

Gravel sub-rounded decorative round cover Sand, trace Silt with sub-rounded Gravel, very fine to medium grained, <1/2-inch), medium to 2 light tan Wit-- Bentonite Grout 4

6 6" Steel Casing 8

10 10" Borehole 12 14 - Augers are grinding, augers are walking down to the southeast likely following a bench in the bedrock from west wall excavation, wet 16 cuttings at 14.0ft BGS 18 Schist. competent, augers found a bench to 20 start drilling through Schist 22 24 Schist, metallic gray

- Schist, metallic gray, dry at 24ft BGS 26 28

- Trace water evident after drill rod change, picked up water 24 and 29 ft BGS at 29 Oft 30 BGS i----6"0pen Borehole 32 34 36 NOTES: MEASURING POINT ELEVATIONS MAY CHANGE; REFER TO CURRENT ELEVATION TABLE

STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 2 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-19 PROJECT NUMBER: 053539 DATE COMPLETED: October 24, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS -'

0:::

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0 s: "'I-uUJ oz al a::

?! UJ _,::>

> I- mO z a:: u

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>-40

>-42 14---6"0pen

.... Borehole

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.... up water 39 to 44 ft BGS at 44.0ft BGS f-------------------'-"~-'-"-"i 5000 -

ENO OF BOREHOLE @ 50.0ft BGS

>-52 ESTIMATED YIELD 0.5+ gpm

>-60

-62

-64 b

~>-68 0::

0 u,

~>-70 u

~

(.')

~>-72

~

~

~>-74 g

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~ NOTES. MEASURING POINT ELEVATIONS MAY CHANGE, REFER TO CURRENT ELEVATION TABLE m

0:

~'--------------------------------------------------'

STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-20 PROJECT NUMBER: 053539 DATE COMPLETED: October 27, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well _,

ftBGS c::

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0 ~~

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., ~17~t-- Bentonite

-- 1 -4 ~

l!Wj:.i-- 2" PVC Well I

Casing I-

~5

--I-

~ "'

8

'=

=

-I-

~10 10 00

=

- - 2" PVC Well I- Clayey Silt with Schist fragments, dark olive-tan with metallic gray Screen

= ... o - Sand Pack 1 -12 I-1-14

.... =

I-

~16

- Minimal resistance to drilling at 15 Oft BGS I-1 -18 I-

~20 I-

~22 I-I-

~

'--24 0

~ -26 I-D I- 27 00 -

~

(!) I- Schist, highly weathered, decreased drill speed a.

a:: ~28 and grinding smooth 28.00 -

0

(.)

a:: I-(.)

I-I\ - Schist. competent, center plug wet when

,___co~u~lle~d~fr~o~m"--=a~uo~e~ra::..::.at~2~6~.0~ft~B~G~S=--~~~~-'

END OF BOREHOLE@ 26.0ft BGS WELL DETAIL:;!

Screened Interval:

B.00 to 28.00ft BGS

..., ~30

a. Length : 20fl

(!)

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- Material : PVC Seal:

I-0 3.00 to 7 .DOit BGS

(!)

0 ~34 Material: Bentonite

...J zw Sand Pack :

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J Cll a::

w 0

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 2 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-20 PROJECT NUMBER: 053539 DATE COMPLETED: October 27, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS 0::

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~ 38

'- 40

~ 42

'--- 44

~ 46

~ 48

'--- 50

~ 52

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'---56

-58

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..,~ ....~a8

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zw D

NOTES: MEASURING POINT ELEVATIONS MAY CHANGE; REFER TO CURRENT ELEVATION TABLE CD e;"'

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-21 PROJECT NUMBER: 053539 DATE COMPLETED: October 29, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta. Pennsylvania FJELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS ftBGS ...J 0::

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Asphalt 090 Gravel with Sand matric, angular, <1-inch, dark P ,...., t~ ~ ,(

~ ~ Concrete 1--~-t=a~n-~b~rn~w~n----------------1~~ 200 0 L- Silty Sand with sub-rounded Gravel, very fine

.... to coarse grained, <1/4-inch, medium tan

'-6

...._8

- Augers are walking northwest at 9.0ft BGS 1-10 1-12 1-14

=

=""-...*...-- 2" PVC Well Screen

- Auger flight returns are wet at 15 Oft BGS

'-16  :: ... i - - - Sand Pack 1-18 1-20 ......

-22

-24 f---------------------1-----l

~

2500 Silty Sand with sub-rounded Gravel, very fine

~-26 to coarse grained, <1/4-inch, medium tan

~-28 0

u,

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z

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~ END OF BOREHOLE @ 32 Oft BGS WELL DETAILS

&l 0 Screened interval :

g-34 12.00 to 32.0011 BGS Length: 20ft z

~t--~~~N-O_T_E_S_:~-M-EA_S_U_R_l_N_G_P_O_IN_T_E_L_E_V_A_T_IO_N_S_M_A_Y~C-HA_N_G_E_._R_E~F-E-R_T_O_C~U-R_R_E_N_T_E_L_E-VA_T_l_O_N_T_A_B_LE~'--~L------L-~-'-~~~

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 2 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-21 PROJECT NUMBER: 053539 DATE COMPLETED: October 29, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS et:

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Diameter: 2in

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10.00 to 32.00ft BGS

'-40

~ Material: #2 Sand

~ 42

'- 44

~46

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~so

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-56

-58

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Cl'.

0 u

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z -66

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1of2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION : MW-PB-22 PROJECT NUMBER: 053539 DATE COMPLETED: October 30, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS ftBGS ...J a:

UJ co ~

a: ~ oz~~

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a: u r--.. Gravel sub-rounded decorative around cover ,,,,- 0.20 Silt and Schist fragments , dark tan with >:::

metallic gray ....

~

I i . - Concrete p

-4

~*

1----S-i-lt-an_d_t-ra_c_e_S_c-hi-st_fr_a_g_m_e-nt-s,-d-a-rk_t_a_n-w-ith----H~ s.oo

'-6 I-metallic gray ~ ~

Bentonite

-8

-10 Silt and trace Schist fragments, dark grayish tan 10.00 I 2" PVC Well Casing

~12 12.00 Silt with Schist fragments, dark gray-tan

'-14 . - 2' PVC Well Screen

...,._ Sand Pack I-I-

'-18 I-

'-20 I-I-

1---------------------H~ 23.00 I- Clayey Sill, dark gray-black

- Auger flight returns are wet at 23ft BGS 1=

. '-26 i----.,.--,,...-------,,.------,------+-'~,..Y 2700 Silty Clayey Sand , very fine to coarse, dark gray-black 1----S-c-h-is-t.-m-e-ta-ll-ic-g-ra_y_ , _co_m_p_e-te_n_t _ _ _ _ _ _ _W . ~

. ,/

., 32 00

~ 3300 I- END OF BOREHOLE @ 33.0ft BGS NOTES: MEASURING POINT ELEVATIONS MAY CHANGE, REFER TO CURRENT ELEVATION TABLE

~

STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 2 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-22 PROJECT NUMBER: 053539 DATE COMPLETED: October 30, 2008 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS -'

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Diameler: 2in

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.... Material: #2 Sand

~ 42

~ 44

'-46

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- NOTES: MEASURING POINT ELEVATIONS MAY CHANGE; REFER TO CURRENT ELEVATION TABLE

i al 0::

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-23 PROJECT NUMBER: 053539 DATE COMPLETED: April 30, 2009 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE llBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well llBGS a:: ...J w w ~ ~

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- Mgular Gravel Fill, dark gray 1-2 Sand with Silt and well rounded pebbles, very fine to coarse grained, <1/4", light to dark tan

>-Concrete with depth Bentonite

.... 2"PVCWell

~4 Casing 1 -5

..=::. *.

, _8 *.. - ..

.. -=,,.*.-+-- 2"PVCWell

.. -- . Screen

.*. = *..

1-10

. ** ~ .'-~ ~ Sand Pack 1 -12

.. = ...

~14 Auger hop indicating increase in amount and size of cobbles, moist

.. =. - .

• .: = *.. :

1-15 Auger smooth grind indicative of competent . =.

~18 r\ bedrock

- No obvious water bearing zone at 16 511 BGS WELL DETAILS Screened interval 1-20 END OF BOREHOLE@ 16.511 BGS NOTE* LEAD AUGER HAD METALLIC GRAY 6.50 to 16.50ft BGS Length: 10fl Diameter. 2in GROUND-UP SCHIST ON FINAL O 8 FEET OF Slot Size: 0.010 AUGER AND BIT Material: PVC Seal:

-22 2.00 to 5.00ll BGS

- Material: Bentonite Sand Pack:

5.00 to 16.50ft BGS

-24 Material: #2 Sand en "i?l -26 I-0

(!)

a.

a:: -28 0

u I

<{

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z

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-24 PROJECT NUMBER: 053539 DATE COMPLETED: July 28, 2009 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ft BGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ft BGS §: ...J J: ~

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I n,

I \_ cover 0.20 Sand with trace of silt and well rounded **

gravel, dark tan, very fine to coarse grained, *:*:*:

<0.5 inch

-2 .\:~*:*:*

..*:*:**:*:*:*:*:* Bentonile 2" PVC Well Casing

-4

.*:*:*:.*:*:*\:~*:-:.

• ..,;-sand Pack

-~~~~~ -""...+-- 2" PVC Well Screen i.*.*.*

r\ -Auger Refusal, cuttings very wet at B.Oft ~ B.00 BGS

'-----=--'-'---------' WELL DETAILS END OF HOLE @ 8.0ft BGS Screened interval.

4.00 to B.OOfl BGS Length: 4ft Diameter: 2in Slot Size 0.01 Material PVC Seal:

1.50 to 3.00fl BGS

<{ Material Bentonote u"' ~

Sand Pack 3.00 to B 0011 BGS

~

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0_,

w xw '-12 ill

"'"'0 ~

"'w ....

i; 3u ....

If) i5

~14

~

8_, ....

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NOTES: MEASURING POINT ELEVATIONS MAY CHANGE; REFER TO CURRENT ELEVATION TABLE

i IIl

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-25 PROJECT NUMBER : 053539 DATE COMPLETED: July 28, 2009 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FJELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS ftBGS --'

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Dolomite Gravel, angular, dark gray, surface cover 0.20 Sand with trace of silt and well rounded gravel, dark tan, very fine to coarse grained,

<0.5 inch Concrete 2 ...

Bentonite 3 ~~- 2" PVC Well Casing 4

5 Sand Pack

._._,___ 2" PVC Well Screen 6

~

l:i(!) - Auger Refusal, cuttings very wet, black with 6.50

0. oily odor and feel at 6.5ft BGS WELL DETAILS 0 END OF HOLE @ 6.Sft BGS Screened interval

~I 7 4.50 to 6 SOit BGS u Length : 2ft Diameter: 2in Slot Size. 0 01 Material: PVC Seal:

1.50 to 3.50ft BGS Material : Bentonile Sand Pack

• 3.50 to 6 50ft BGS Material* #1 Sand 9

STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 1 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-26 PROJECT NUMBER: 053539 DATE COMPLETED: July 28, 2009 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA LOCATION: Delta, Pennsylvania FIELD PERSONNEL: C. Pidge DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well fl BGS -'

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r

g; ~

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Dolomite Gravel, dark gray, angular, surface 0.30 cover Sand with trace of silt and well rounded Concrete gravel. dark tan, very fine to coarse grained, 2 <0.5 inch 4

Bentonite 2" PVC Well 6 Casing 8 - wet cuttings at B Oft BGS ...

10 12 .. .

14

... Sand Pack

... - - - - 2" PVC Well 16 Screen

~

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a. 18 Cl:

0

~I ...

Cl:

u

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(!)

z - Auger Refusal, cuttings very wet at 20.Sft 20.50 g BGS WELL DETAILS w

w x END OF HOLE@ 20.Sft BGS Screened interval.

22 10.50 to 20 SOit BGS

~ Length: 10ft

~ Diameter: 2in Cl:

w Slot Size: 0.01

i; Seal:

5u 24 2.00 to B.5011 BGS rn Material: Bentonite 15 Sand Pack:

0 z B.50 to 20.5011 BGS 26 Material: #1 Sand

STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-27 PROJECT NUMBER: 053539 DATE COMPLETED: February 16, 2010 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: R. Burns DEPTH DEPTH SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS ftBGS -'

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Gravel, sub-rounded, decorative ground cover Sand, trace Silt with sub-rounded Gravel, very 2 fine to medium grained, (<1/2-inch), medium Bentonite to light tan Grout 4 ~ij-- 5" Steel Casing 6

6.25" Borehole 8

Schist, competent, metallic gray, estimated yield 2 gpm 10 12 14 16 18 20 22 24 26

---

4"0pen Borehole 28 30 32 34

- fracture, water yield increased approx. 2+

gpm, water color change gray to muddy 36 brown, some rounded quartz pebbles 38 - water color change muddy brown to gray at 38.0ft BGS

STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 2 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-27 PROJECT NUMBER: 053539 DATE COMPLETED: February 16, 2010 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta. Pennsylvania FIELD PERSONNEL: R. Burns DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS -'

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1- 42

- 44

-46 46.00 -

END OF HOLE @ 46 Oft BGS

-48 ESTIMATED YIELD 5+ GPM

,_50

'-52 1-54

'-56

'-58

,_60

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ii -64 ti Cl

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 1 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-28 PROJECT NUMBER: 05353g DATE COMPLETED: February g, 2010 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: R. Burns DEPTH DEPTH SAMPLE STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well _,

ftBGS ftBGS §: ~ ~I-en J: ~ 0 oz I- a: (..) _,:::>

c.. w w ooO w I-Cl ~

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Gravel, sub-rounded, decorative ground cover Sand, trace Silt with sub-rounded Gravel, very 2 fine to medium grained, (<1/2-inch), medium E:l'A!lf-- Bentonite to light tan Grout 4

6 6.25" Borehole 8

5" Steel Casing 10 12 14 16 Schist, competent, metallic gray, quartz 18 20 22 0

24 - wet at 24 Oft BGS a

(!) - dry from 25' to 48' CL 0: 26 0

u,

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STRATIGRAPHIC AND INSTRUMENTATION LOG (OVERBURDEN) Page 2 of 2 PROJECT NAME: Peach Bottom Atomic Power Station HOLE DESIGNATION: MW-PB-28 PROJECT NUMBER: 053539 DATE COMPLETED: February 9, 2010 CLIENT: Exelon Generation Company LLC DRILLING METHOD: HSA/Air Hammer LOCATION: Delta, Pennsylvania FIELD PERSONNEL: R. Burns DEPTH DEPTH SAMPLE ftBGS STRATIGRAPHIC DESCRIPTION & REMARKS Monitoring Well ftBGS @: -'

~ ~

0 :l:~

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'-44

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-SO ESTIMATED YIELD 0.5+ GPM

-52

'-54

'-56

....'-58

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n.

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WELL CONSTRUCTION LOG Project Name: Peach Bottom Well Designation: _ _ _ _ _ _ _ _ _ _ _ _M_W_*_P_B_-2_9_

Project No.: 53539 Dale Completed: 5/25/2011 Cllent: Exelon Drilling Method: Hollow Stem Auger Location: Delta, PA CAA Scientist: Richard Burns Survey Information: Driller: B.L. Myers Bros., Inc. of PA Top of inner casing: 115.05 Feet MSL Northing: 14441407.64 Ground surface: 115.3 Feet MSL Easting: 1284025.24 NOTTO SCALE Protective Casing Height: _ _N_IA __

~~} :~~ ?::\::::::::::::::;::::::::::::::::::::-:-:-:. -.

'.:.;'. ; :' :':'.:'.:'.'. ...-_,.....,_,.._.,._.,._.#PV,.1:

1

-:::::::

Boring:

Diameter* HSA Nominal 4.5-mch Casing:

Diameter: NIA Material: N/A Depth: _ _N_IA __ ~----- Riser:

Diameter: 2-inch Length . 4.5 Grout: Connections Flush-threaded Composition: Portland Type I cement Material: PVC with 5% bentonite 1.5 Feet BGS, Top of Seal Bentonite Seal Material: Chips, hydrated Screen: ..

Slot Size: 20 slot I 0.01-mch Length: 5 __3_.s__ Feet BGS. Top of #2 Sand Diameter: 2-inch Material: PVC __ 4_.s__ Feet BGS, Top of Screen Sand/Gravel Groundwater:

Size: #2 First Encountered. Approx 7 feet 3 inches Static Level :

Material: Silica Sand Bottom Plug __ 9._S__ Feet BGS, Bottom of Screen Malerial: PVC __ 9_.5__ Feet BGS, Depth cl Boring Connection: Threaded Depths Below Ground Surface (BGS)

CRA Development was completed May 25, 2011 by surge and pump technique .

WELL CONSTRUCTION LOG Project Name: Peact1 Bottom Well Designation: _ _ _ _ _ _ _ _ _ _ _ _M_W_-_P_B_-_30_

Project No.: 53539 Date Completed: 5/25/2011 Client: Exelon Drilling Method: Hollow Stem Auger Location: Delta, PA CRA Scientist: Richard Burns Survey Information: Driller: B.L. Myers Bros., Inc. of PA Top of Inner casing: 114.69 Feet MSL Northing: 14441373.26 Ground surface: 115.59 Feet MSL Easting: 1284039.50 NOTTO SCALE Protective Casing Height: _ _N_l_A __

Concrete Boring:

Diameter: HSA Nominal 4.5-inch Casing:

Diameter.

- -NIA---

Material.

- -NIA Depth _ _N_IA_ _ Riser:

Diameter: 2-inch Length : 4.5 Grout: Conneclions: Flush-threaded Composition: Penland Type I cement Malarial: PVC with 5% bentonite 1.5 Feet BGS, Top of Seal Bentonite Seal Material: Chips, hydrated Screen:

Slot Size: 20 slot I 0.01-inch Lenglh: 10 _ _4_ _ Feet BGS, Top of #2 Sand Diameter: 2-inch Material: PVC _ _5_ _ Feel BGS, Top ol Screen Sand/Gravel Groundwater:

Size: #2 --.._.

Firsl Encountered* Approx 6 feel 3 inches Malarial: Silica Sand Static Level

---

~

Bottom Plug Malerial: PVC

---

15 Feet BGS. Bottom of Screen

_ _1_5__ Feel BGS, Depth ol Boring Conneclion: Threaded Depths Below Ground Surface (BGS)

CAA Development was completed May 25 2011 by surge and pump technique.

WELL CONSTRUCTION LOG Project Name: Peach Bottom Well Designation: _ _ _ _ _ _ _ _ _ _ _ _M_W_-_P_B_-3_1 Project No.: 53539 Date Completed: 5/25/2011 Client: Exelon Drilling Method: Hollow Stem Auger Location: Delta, PA CRA Scientist: Richard Burns Survey Information: Driller: B.L. Myers Bros., Inc. of PA Top of inner casing: 114.73 Feet MSL Northing: 14441303.61 Ground surface: 115.59 Feet MSL Easting: 1284053.19 NOTTO SCALE Protective Casing Height: _ _N_IA __

Boring:

Diameter* HSA Nominal 4.5-inch Casing:

Diameter: NIA Material : NIA Depth : _ _N_IA __ Riser:

Diameter: 2-inch Length: 2.5 Grout: Connections: Flush-threaded Composition: Portland Type I cement Material : PVC with 5% bentonite

_ _ _ _ Feet BGS, Top of Seal Bentonite Seal Material: Chips, hydrated Screen:

Slot Size: 20 slot I 0.01-inch Length: 5 _ _2_ _ Feet BGS. Top of #2 Sand Diameter: 2-inch Material: PVC _ _3_ _ Feet BGS. Top of Screen Sand/Gravel Groundwater:

Size: #2 First Encountered: Approx 6 feet O inches Material: Silica Sand Static Level:

Bottom Plug

- - Feet SGS. Bottom of Screen Material: PVC __a__ Feet BGS. Depth of Boring Connection: Threaded Depths Below Ground Surface (BGS)

CRA Development was completed May 25, 2011 by surge and pump technique.

OMITTED AT NRC STAFF'S REQUEST FROM REDACTED VERSION OF THE HYDROGEOLOGIC INVESTIGATION REPORT DATED DECEMBER 2018 GHD I Hydrogeologic Investigation Report 111137316 (1)

OMITTED AT NRC STAFF'S REQUEST FROM REDACTED VERSION OF THE HYDROGEOLOGIC INVESTIGATION REPORT DATED DECEMBER 2018 GHD I Hydrogeologic Investigation Report 111137316 (1)

OMITTED AT NRC STAFF'S REQUEST FROM REDACTED VERSION OF THE HYDROGEOLOGIC INVESTIGATION REPORT DATED DECEMBER 2018 GHD I Hydrogeologic Investigation Report I 11137316 (1)

OMITTED AT NRC STAFF'S REQUEST FROM REDACTED VERSION OF THE HYDROGEOLOGIC INVESTIGATION REPORT DATED DECEMBER 2018 GHD I Hydrogeologic Investigation Report 111137316 (1)

OMITTED AT NRC STAFF'S REQUEST FROM REDACTED VERSION OF THE HYDROGEOLOGIC INVESTIGATION REPORT DATED DECEMBER 2018 GHD I Hydrogeologic Investigation Report 111137316 (1)

www.ghd.com RAl-GW-7, Response b GW-22

0 0 0 0 0 Flow _ 0 009a, b 008 017 007 002 Conowinao Pond 001

• t T

'4,600,000 GPD c

Outer Screen l::so§o GPO Structure

.......__ _ _ __, 9,200,000 GPO Screen Wash 28,224,000 GPO Evapor;ion I

30,000,000 GPO Evaporation Losses I I 0 0

~ a. CT-1 Emergency la o C> , ServiceWater ----,

Up River Storm Water ~ q N

I 1

I I

Outfalls o S!! CO C\!_

I I

01 I ***

I 010, 012- a. N

• CT-l Hig ' h Pressure a.' Yard &

022, 025-033 E I .---

c:

- , (!)I gq e>~ R~I I

> 136,000 GPO *

• Service Water

a. g, Drains /Vp. Baller FuelOl 0

a. C - l* 0c LoadlngArea I I Rock Run C!J 0

c -----fr(!) b ~:I Q.

~

0 N SW SW

---i Creek 0

..,6 c g

C>

g C\i

.- 1,100,000 GPO ~ g ~  : 20,000 LLRWSF Screen Wash (Service C> C!. ~ L----- Cooling Water ...__,,.....__ _ _-'

Sump G-ourd* WaterTravelingScreens) g .., <D Discharge Pond ~ *--f'if.P___ J Radwaste

,___ ..-----------~ g  :

~

lj Outfall 600 GPO 'iij  :

2,160,000,000

.-----re N 003 0 Aux Boiler Slowdown 8 l I

Condenser , Yard&

0a..

(!)

GPO Cooling 48,000

~

,!* Storm Water Roof C I Drains 0 CQ I

,....._ ~ a.  ;---- --- ---- 1

~ _ _, '* -J \______ Fire - - - - --~ f; , N <!> , *  :

("') system -- ---- - --*~r -------------J ~ - * \_!

g

~

400,000 GPO 136,000 GPO ~ Domestic 0

GPO Oil Interceptor I

... 76.386 800 GPO I Equip~ent Cooling 76 386 800 GPO

~

132,000 GPO CC) g l8 W~

Storm Unit3 Yard OGPD Water Drain Sump 44,000GPO Iii 1,584,000 Emurgency Makeup Senllce Water , _ , . - - - - Water Skid 72,000 GPO GPO Ring Header.. GPO Misc. Plant Users Unlt2Yard Drain Sump

..:....., I 247.700 GPO I

Adrnlnislr.lllon BulldlngAlr Conditioning .

I 247,000 r.:co

-* y 28,SOOGPD Losses Yard Roof I 136,000 GPO _I _P_,u._m_p_L-ube.........,I Water Drains Schematic of Water Flow Notes:

SW= Storm Water Revision Exelon Nuclear ncl CT = Cooling Tower Dates

=

GPO Gallons Per Day

~ Point of Chem ical Addition LLRWSF = Low-level Radwaste Storage Facility D Sampling Port

• Standby Safety Systems - not typically operated

• • Emergency Service Water Ring Header flow estimates consist of service Line Drawing 0 Outfall Number water supply during normal conditions.

---+ Flowpath Alternate Route

©-- Denotes point of chemical addition (additives listed in Module

1. Section 7 of the oermit aoolicationl. 1124/201 Date:

12/11/2013 Job Number:

19999737.00001 Fiaure Number:

NPDES-1

ENCLOSURE A Peach Bottom Atomic Power Station, Units 2 & 3 Responses to NRC Subsequent License Renewal Environmental Review Requests for Additional Information HISTORIC & CULTURAL RESOURCES HC-1

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-HC-1 Category: Historic and Cultural Resources ER Section: 3.7 .2 Statement of Question:

Section 3. 7 .2 of the ER states that Exelon maintains records that "indicate that no historic landscape, traditional cultural property, or archaeological sites have been identified at the PBAPS site since the time of its construction, and confirm that no potentially significant artifact deposits have ever been documented within the present APE" . Provide a copy of these records.

Response

The statement from Section 3.7.2 of the ER that is quoted in this question was misleading. Exelon Generation does maintain records that would capture information about cultural resources at the PBAPS site if such resources had been identified and documented. Accordingly, the basis for the quoted statement was the absence of documentation in those records, rather than the presence of documentation.

References:

NONE HC-2

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-HC-2 Category: Historic and Cultural Resources ER Section: 3.7.2 Statement of Question:

Section 3. 7.2 of the ER states that there are structures associated with PBAPS Units 1, 2 and 3 that will exceed 50 years of age during the subsequent license renewal (SLR) term. Identify and describe these structures. Additionally, provide the current age of the structures and how the age was determined (e.g., commencement of operation, end of construction, etc.) .

Response

Exelon Generation uses the issuance date of the initial operating license as the date from which to measure the age of each reactor at the PBAPS site. This date can be determined with certainty and it represents a point in time when construction or assembly of supporting components of the electrical generating facility associated with a particular reactor would be complete. For other site buildings that were constructed in parallel with one or more of the reactors and that serve more than one reactor, Exelon Generation would measure the age of the building from the date on which the oldest reactor served was first licensed to operate. The dates on which the reactors at PBAPS were initially licensed to operate are:

• June 1967 - Unit 1

• August 8, 1973 - Unit 2

• July 2, 1974 - Unit 3 Based on the criteria for evaluation of eligibility for listing on the National Register of Historic Places (NRHP), Exelon Generation has no reason to believe that any structure on the PBAPS site, except the Unit 1 reactor building, has potential historic significance.

Other buildings on the site that were constructed in parallel with the PBAPS Units 2 and 3 reactor buildings include the Turbine Building/Control Room Complex and the Radwaste Building, along with a several buildings that contain offices or system equipment.

References:

NONE HC-3

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-HC-3 Category: Historic and Cultural Resources ER Section: 4.7 Statement of Question:

The ER states that "appropriate consideration will be given to the historic significance of the Unit 1 structures at the time of Unit 1 decommissioning." Will a NRHP eligibility evaluation be conducted by Exelon for Unit 1 as well as Units 2 and 3 prior to decommissioning? How will Exelon ensure that the Units are maintained and not dismantled prior to proper historic significance consideration?

Response

Current NRC regulations require that, within 2 years following permanent cessation of operations, licensees prepare a Post-Shutdown Activities Report (PSDAR), which must include a discussion of the environmental impacts associated with site-specific decommissioning activities (1 O CFR 50.82(a)(4)(i)). Accordingly, after permanent shutdown, Exelon Generation will review potential impacts of decommissioning on historic resources as part of PSDAR preparation . Then, before commencing decommissioning activities that would dismantle potentially significant historic resources at the site, Exelon Generation will take steps in accordance with company procedures and applicable laws and regulations (e.g., 10 CFR 50.82(a)(6)) to ensure that additional site investigations and consultations with the PA State Historic Preservation Office, possibly including evaluation for NRHP eligibility, are conducted as needed, and that decommissioning effects are appropriately addressed.

References:

NONE HC-4

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-HC-4 Category: Historic and Cultural Resources ER Section: 4.7 Statement of Question:

Section 4.7 of the ER states that Unit 1 "entered SAFSTOR mode in 1978, with continued surveillance, security, and maintenance ... " Describe actions that Exelon has taken to maintain the physical and historic integrity of Unit 1.

Response

In March 1986, Unit 1 was awarded the American Nuclear Society's Nuclear Historic Landmark Award, which identifies and memorializes sites or facilities where outstanding physical accomplishments took place that were instrumental in the advancement and implementation of nuclear technology and the peaceful uses of nuclear energy. As an experimental helium-cooled, graphite-moderated reactor, Unit 1 was a pioneer in the development of commercial nuclear power technology.

To achieve SAFSTOR status for Unit 1, all spent fuel has been removed, the spent fuel pool has been drained and decontaminated, radioactive liquids have been removed, and accessible areas have been decontaminated.

Actions that Exelon Generation has taken to preserve the integrity of the Unit 1 structure and assure radiological safety include the following:

• An exclusion area is maintained using barriers and locked access points.

• Accessibility to various areas in the containment and spent fuel pool building is preserved for radiological surveys and inspections.

• Structural inspections are performed to detect indications of significant corrosion, cracks, or structural integrity concerns.

o Inspections over the years revealed water intrusion and roof leaks.

o Mitigating actions that began in 2013 included repairs to storm drains, piping, roadway grading, and roofs.

• Other physical maintenance activities at Unit 1 since 2013 that help maintain the Unit 1 Containment historic integrity include:

o Replacing rusted exterior doors o Painting exterior steel and new doors o Concrete repair around the exterior base of the Containment o Removal and repair of the Building Fa9ade stucco panels o Repainting of Containment Dome exterior

• Unit 1 has a continuous crew to maintain emergent housekeeping issues.

In the entrance lobby at Unit 1, Exelon Generation has installed a video presentation that chronicles the life of the project from construction through its entry into SAFSTOR.

References:

NONE HC-5

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-HC-5 Category: Historic and Cultural Resources ER Section: 3.7.2 Statement of Question:

Section 3. 7 .2 of the ER states that the Peach Bottom property was evaluated by an archeologist in 1972. Identify the areas that were evaluated by the archeologist and what percentage of the Peach Bottom site property was evaluated.

Response

Following a reasonable search, Exelon Generation did not find documentation of the 1972 archeological evaluation at PBAPS. Therefore, Exelon Generation is unable to answer the question about areas evaluated in 1972 and percentage of the Peach Bottom site property evaluated in 1972. Notwithstanding, below is an excerpt from the 1973 PBAPS Operating License-Final Environmental Statement (p. Xlll-4). This information was the basis for the statement in Section 3.7.2 of the ER that is quoted in this question and provides insight into the content of the 1972 evaluation .

While no detailed archeological survey was conducted at the Peach Bottom Atomic Power Station prior to the start of construction, Mr. Ira F. Smith; Ill, a Field Archeologist with the William Penn Museum of the Pennsylvania Historical and Museum Commission was requested by the applicant to make a survey in June, 1972. In letters describing the results of his survey, Mr. Smith said, in part," ...

investigations ... were somewhat academic since the actual construction of the reactors would already have destroyed any Indian sites that might have been present at those locations. However, it is unlikely that there were ever any sites there in the first place ... . it is the flood plain and terrace that are the most likely areas to find Indian settlements and these are obviously no longer susceptible to investigation at Peach Bottom because they have either been built upon in the past or flooded by the backwaters of Conowingo Pond."

References:

NONE HC-6

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-HC-6 Category: Historic and Cultural Resources ER Section:

Statement of Question:

Approximately what percentage of the Peach Bottom property has been disturbed?

Response

Based on Google Earth Pro imagery, approximately 50% of the 620-acre site has been disturbed. The 'main plant' (including filled and enclosed waters) is approximately 170 acres. The two substations are at least 80 acres in total, plus there are at least 80 acres of disturbed lands for utility lines and other structures. An aerial photo from the construction era is provided below.

References:

NONE HC-7

ENCLOSURE A Peach Bottom Atomic Power Station, Units 2 & 3 Responses to NRC Subsequent License Renewal Environmental Review Requests for Additional Information MICROBIOLOGICAL HAZARDS MH-1

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-MH-1 Category: Microbiological Health ER Section: 2.2.3 Statement of Question:

Section 2.2.3 of the ER states that Exelon controls the accumulation of deposits and biofouling organisms in the condensers through the regular use of an on-line condenser cleaning system and dosages of chlorine. The ER also states that Exelon's NPDES permit limits the discharge of Total Residual Chlorine concentration in the permitted outfall to 0.20 milligrams per liter (mg/L) (instantaneous maximum). Please describe the general dose frequency and average concentration of chlorine that is released into Conowingo Pond.

Response

The need to chlorinate the circulating water system is routinely evaluated and triggered as needed based on condenser performance. In addition, chlorination of the circulating water system is always triggered if the On-Line Condenser Cleaning System (Rockets) will be out of service for maintenance for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The following limitations on chlorination apply, as established in site procedures:

• Do NOT chlorinate Unit 2 AND Unit 3 simultaneously.

• Do NOT chlorinate Circulating water AND Service water bays simultaneously.

• Do NOT exceed 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />s/day chlorination per generating Unit from October 1 to May 31 in accordance with NPDES Permit PA 0009733.

• Do NOT exceed 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />s/day chlorination per generating Unit from June 1 to September 30 in accordance with NPDES Permit PA 0009733 .

• Do NOT chlorinate more than one Circulating water bay at a time.

Hypochlorite injection duration is directed and adjusted by Chemistry to maintain free chlorine levels such that NPDES Permit limits are met at the discharge point.

Total residual chlorine monthly average concentrations are reported in the monthly NPDES Discharge Monitoring Reports and summarized in the table referenced below.

References:

Summary Table of Outfall 001 Monthly Average Concentrations from NPDES Discharge Monitoring Reports for 2016, 2017, and January to June, 2018.

The Summary Table listed above, which includes discharges from the circulating water system and other effluents, is incorporated into this response sheet for ease of reference.

MH-2

RAl-MH-1, Reference MH-3

PBAPS NPDES PERMIT No. 0009733 Outfall 001

• 2018 Tl:MI' - 11:MP- FLOW- ll'H - l'H - IUfAL IUIAL lrRC-** NALCO HbuM-Ave Mo Max Daily FLOW-Ave Max Daily Daily Daily PHOSPHORUS - PHOSPHORUS - nsta Max Daily Max (deg F) (deg F) Mo(MGD) (MGD) Min Max Avg Mo (lb/day) Ave: Mo (mg/L) (mg/L) (mg/L)

JAN 65.2 71.2 1,786.24 2,228.96 7.4 8.3 < 929.48 <.05 0.1 GG FEB 66.5 72.2 1,923.08 2,226.60 7.4 8 < 628.56 <.05 0.15 GG MAR 66.1 71.0 2,142.60 2,238.80 7.2 8.2 < 778.4 <.05 0.2 GG APR 73 .2 81.0 2,195 .97 2,225.70 7.3 8.2 < 926.42 < .05 0.1 GG MAY 88.7 92.9 2,209.08 2,219.80 7.5 8.1 < 925.55 < .05 0.1 GG JUN 95 .6 100.2 2,207.14 2,224.60 7.5 8 1033.89 0.056 0.1 <.025 JUL N/A AUG N/A SEP N/A OCT N/A NOV N/A DEC N/A 2017 11:MP- 11:MP- FLOW- l'H - ll'H - IUIAL IUTAL 1Kl. - lnsta INALCO HlSOM-Ave Mo Max Daily FLOW-Ave Max Daily Daily Daily PHOSPHORUS - PHOSPHORUS - Max Daily Max (deg F) (deg F) Mo(MGD) (MGD) Min Max Avg Mo (lb/day) Avg Mo (mg/L) (mg/L) (mg/L)

JAN 63.3 70.3 2,182.40 2,242.50 6.9 8 < 934.3 <.05 0.04 GG FEB 64.3 74.8 2,039.70 2,244.80 7 7.9 < 793.8 <.05 0.04 GG MAR 66.5 73.0 2,208.70 2,244.40 6.8 7.9 < 934.41 <.05 0.02 GG APR 78.5 87.5 2,238.70 2,241.80 6.8 6.8 < 934.41 < .05 0.04 GG MAY 62.7 69.0 2,224.90 2,243.40 7.3 8.4 < 934.85 <.05 0.02 GG JUN 96.5 101.7 2,247.50 2,283.70 7.5 8.3 < 934.35 < .05 0.1 GG JUL 101.0 104.8 2,214.30 2,233.50 7.5 8 < 934.34 <.05 0.12 <.l AUG 99.0 101.2 2,210.40 2,213.20 7.6 8.1 2027.82 0.11 0.06 GG SEP 95.9 99 .2 2,215 .40 2,218.70 7.8 8.2 < 923.94 < .05 0.15 GG OCT 90.8 97.5 1,937.10 2,225.80 7.7 8 < 925.2 < .05 0.09 < .022 NOV 69.6 80.3 2,069.30 2,227.40 7.4 8 < 925.22 < .05 0.14 GG DEC 62 .8 67.0 2,216.00 2,246.00 7.8 8.2 < 929.34 < .05 0.1 GG

• If there was no discharge of a specific parameter, or if data were not available for a specific parameter for the entire reporting period, a "No Data Indicator (NODI)" code is entered into the Discharge Monitoring Report to provide an explanation . "GG" is the NODI used if the permit requires sample collection and analysis only under certain conditions and those conditions were not met during the reporting period (e.g., report chlorine results only when chlorination system is used).

• • TRC = Total Residual Chlorine 1of2

PBAPS NPDES PERMIT No. 0009733 Outfall 001

• 2016 ltMP- 1tMP- FLOW- l'H - l'H - IUfAL IUIAL TRC-** INALCO Hl:>UM -

Ave Mo Max Daily FLOW-Ave Max Daily Daily Daily PHOSPHORUS - PHOSPHORUS - lnsta Max Daily Max (deg F) (deg F) Mo(MGD) (MGD) Min Max Avg Mo (lb/day) Avg Mo (mg/L) (mg/L) (mg/L)

JAN 63 .S 70.2 1,969.80 2,242.90 6.9 8 < 934.3 o.os 0.04 GG FEB 62 .9 66.0 2,087.00 2,243.60 6.9 7.7 < 63S.05 o.os o.os GG MAR 72.3 78.0 2,236.60 2,242 .90 7 8 < 1870.16 0.1 0.04 GG APR 79.S 88.0 2,232.50 2,244.80 7.2 8 < 934.4 <.OS 0.04 GG MAY 8S .7 99.8 2,234.10 2,243.00 7.1 8 < 934.4 o.os 0.04 GG JUN 98.2 101.8 2,260.90 2,28S.80 7 7.8 < 934.3 <.OS 0.1 <.l JUL 102.2 104.3 2,267.00 2,284.20 7.6 8.2 < 947.72 o.os 0.04 GG AUG 102.1 lOS.O 2,282.70 2,287.40 7.6 8.1 < 9Sl.2 o.os 0.04 <.l SEP 103.6 lOS.8 2,272.40 2,291.70 7.4 8 < 9Sl.18 o.os 0.07 GG OCT 88.1 96.2 2,004.60 2,284.00 7.3 8.1 9Sl.3 o.os 0.02 GG NOV 72.6 78.S 1,917.SO 2,242.20 7 7.7 < 981.7 <.1 0.04 GG DEC 64.7 71.0 2,108.60 2,241.40 7.1 8.1 < 784.42 <.OS 0 .02 GG

• If there was no discharge of a specific parameter, or if data were not available for a specific parameter for the entire reporting period, a "No Data Indicator (NODI)" code is entered into the Discharge Monitoring Report to provide an explanation. "GG" is the NODI used if the permit requires sample collection and analysis only under certain conditions and those conditions were not met during the reporting period (e.g., report chlorine results only when chlorination system is used).

• • TRC = Total Residual Chlorine 2 of 2

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-MH-2 Category: Microbiological Health ER Section: 3.6.1.3 Statement of Question:

Section 3.6.1.3 of the ER states that Exelon controls non-native aquatic species by applying biocides, in accordance with its current NPDES permit. Please describe the general frequency that Exelon applies biocides and the average concentration that is released into Conowingo Pond.

Response

The non-native aquatic species controlled using biocides are zebra mussels and Asiatic clams. Biocides to control these species are applied when river temperature is 60°F or higher. Typically, a biocide application event lasting 3 to 4 days occurs three times per year during May, July, and September. During times of discharge, one grab sample per application event is required by the NPDES permit. The concentration is reported in the NPDES Discharge Monitoring Reports for the months during which biocide application events occur. During years 2016 and 2017, as well as for January to June 2018, the biocide concentration reported was less than the detection limit of 0.02 mg/L (see table in Response to RAl-MH-1). The currently approved biocide is NALCO H150M. Any new chemical additive or increase in the usage rate of the existing chemical additive will be re-evaluated by PADEP as specified in Part C.IV.A.3 of the NPDES permit.

References:

NONE MH-4

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-MH-3 Category: Microbiological Health ER Section: 4.9.1 Statement of Question:

Section 4.9.1 of the ER states that the Exelon continually disinfects PBAPS's sewage effluent. Please describe the general frequency of disinfection activities and the type and amount of disinfectants that are released into Conowingo Pond.

Response

The onsite sewage treatment plant injects sodium hypochlorite into the sewage effluent at varying amounts, as needed, to maintain effluent residual chlorine concentrations at levels within NPDES effluent limits. Samples of effluent are collected and analyzed for residual chlorine concentration, which allows adjustment of the sodium hypochlorite injection rate to ensure permit compliance. The NPDES permits limits are 1.6 ppm (instantaneous maximum) and 0.5 ppm (monthly average). The residual chlorine concentrations reported in the NPDES Discharge Monitoring Reports during 2016, 2017, and January to June 2018 are provided in the table referenced below.

References:

Summary Table of Outfall 005 Monthly Average and Instantaneous Maximum Concentrations from NPDES Discharge Monitoring Reports for 2016, 2017, and January to June 2018.

The Summary Table listed above, which includes discharges from the sewage treatment system, is incorporated into this response for ease of reference.

MH-5

RAl-MH-3, Reference MH-6

PBAPS NPDES PERMIT No. 0009733 Outfall 005 2018 2018

- rcuu I re<.#\L OXYGEGN- TSS- FLOW - FLOW- PH- PH- TOTAL TRC*- NITROGEN- COLIFORM- -

Min Daily Avg Mo Avg Mo Max Daily Daily Dally PHOSPHORUS - TRC*-Avg lnsta Max Avg Mo Geometric Mean lnsta Max CBODS-(mg/L) (mg/L) (MGD) (MGD) Min Max Avg Mo (mg/L) Mo (mg/L) (mg/LI (mg/L) (CFU/100 ml) (CFU/100 ml) Avg Mo (mg/L)

JAN 10.1 6., 0.006 0.014 7.2 8 0.3 0.2 0.9 7.8 <l <l 8.5 FEB 10.5 <3 0.009 0,015 7.2 7.8 0.16 0.21 0.4 1.31 <l <l 3.23 MAR 9.9 3.C 0.007 0.014 7 7.8 0.1 0.2 0.3 0.68 <l <1 8 APR 9.4 <3 0.007 0.011 7.3 8.1 <.l 0.2 o.s 0.99 1.5 <2 <2 MAY 8.4 <4 0.01 0.019 7.4 8.1 < .17 0.2 0.3 <.683 < 1.4 <2 <2 JUN 8.2 <9 0.009 0.017 7.3 8.1 < .l 0.2 0.6 < .58 11 20 3.67 JUL N/A N/A AUG N/A N/A SEP N/A N/A OCT N/A N/A NOV N/A N/A DEC N/A N/A 2017 2017 DISSOLVED AMMONIA- FECAL OXYGEGN - TSS- FLOW- FLOW- PH- PH- TOTAL ITRC * - NITROGEN- COLIFORM- FECAL COLIFORM Min Daily Avg Mo Avg Mo Max Daily Daily Daily PHOSPHORUS - TRC* -Avg lnsta Max Avg Mo Geometric Mean lnsta Max CBODS-(mg/L) (mg/L) (MGD) (MGD) M in Max Avg Mo (mg/L) Mo(mg/L) (mg/L) (mg/L) (CFU/100 ml) (CFU/100 ml) Avg Mo (mg/L)

JAN 10.1 <4 0.01 0.018 6.8 7.6 0.22 0.2 0.5 10.9 <l <l 7 FEB 9.7 <5 0.009 0.018 6.7 7.7 0.24 0.2 0.8 34.3 <l 1 11 MAR 7.2 < 14 0.01 0.017 5 7.8 0.26 0.2 0.8 24.3 <l <l <5 APR 8.1 <6 0.009 0.021 7.2 7.9 0.2 0.2 0.8 6.7 <l <1 <5 MAY 8.2 <3 0.009 0.013 6.6 7.9 <.l 0.14 0.3 <.6 2 2 <5 JUN 6.3 <3 0,01 0.016 7.2 7.9 < .1 0.1 0.3 <.6 <2 5 < 6.2 JUL 7.6 <3 0.011 0.019 7.3 8.1 < .l 0.1 0.3 < .6 2 4 < 10 AUG 7.8 <3 0.012 0.022 7.1 8 < .l 0.15 0.4 < .75 4 14 6 SEP 6.9 <3 0.011 0.02 7.2 7.9 < .l 0.15 1.6 < .75 <l <l 9 OCT 5.2 <3 0.016 0.027 7 8 < .18 0.19 0.4 < .93 <l <l 6 NOV 8.6 4.E 0.016 0.029 7.1 7.7 < .2 0.22 0.6 26.2 <l 1 8 DEC 9.6 <3 0.009 0.02 7 8.1 < .l 0.2 0.7 0.79 <l <l 4

• TRC =Total Residual Chlorine 1of2

PBAPS NPDES PERMIT No. 0009733 Outfall 005 2016 2016 DISSOLVED TRC* - AMMONIA- FECAL OXYGEGN- TSS- FLOW- FLOW- PH- PH - TOTAL TRC*- lnsta NITROGEN- COLIFORM- FECAL COLIFORM Min Dally Avg Mo Avg Mo Max Daily Dally Dally PHOSPHORUS - Avg Mo Max Avg Mo Geometric Mean lnsta Max CBODS-(mg/L) (mg/L) (MGD) (MGD) Min Max Avg Mo (mg/L) (mg/L) (mg/L) (mg/L) (CFU/100 ml) (CFU/100 ml) Avg Mo (mg/L)

JAN 10.9 <3 0.012 0.021 7.4 8.2 < .l 0.1 0.5 < 6.6 <20 400 <5 FEB 10.1 8.0 0.012 0.023 7.1 7.9 0.4 0.3 0.6 9.1 <l <l 14 MAR 8.1 7.C 0 .012 0.022 7.2 8 0.3 0.1 0.4 9 1 1 <9 APR 7.9 <4 0.013 0.022 7.3 8.1 < .2 0.1 0.4 3.9 197 530 <13 MAY 7.C <3 0.013 0.022 7.6 8.3 0.1 0.16 0.5 0.6 33 140 <5 JUN 7.1 <5 0 .014 0.023 7.7 8.5 0.3 0.1 0.3 < .6 85 360 <5 JUL 7.4 <3 0.015 0.023 7.5 8.2 < .13 0.13 0.55 < 1.65 <3 8 <6 AUG 7 .C <3 0 .017 0 .025 7.5 8.2 0 .3 0.08 0.17 < .6 29 40 < 13 SEP 7.2 <3 O.Dl5 0.024 7.1 8.3 0.1 0.2 0.97 < .6 < 44.7 2000 <3 OCT 6.2 <3 0.017 0.027 7.1 8.2 0.1 0.2 0.6 21.3 <l 1 < 18 NOV 8.8 <3 0 .016 0.029 7.3 7.9 < .17 0.3 0.62 89.5 <l <l 6 DEC 9.3 <3 0.009 0.02 6.9 8 0.14 0.3 1 <l 5 27 4

• TRC =Total Residual Chlorine 2 of 2

7 Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-MH-4 Category: Microbiological Health ER Section: Not Applicable Statement of Question:

Legionellosis outbreaks are often associated with complex water system houses inside buildings or structures, such as cooling towers. Describe any procedures, measures, or best management practices that would minimize the risk for workers to come into contact with Legionella.

Response

Exelon Generation maintains no standing procedures that specifically address Legionella spp. hazards during cooling tower maintenance activities at PBAPS.

However, as part of its commitment to occupational safety and health, Exelon Generation has implemented a Job Hazard Analysis procedure, which provides a standard methodology for identifying industrial hazards prior to performance of jobs. The Job Hazard Analysis procedure, which is used to break down the steps of the job, identify the potential hazards, and establish recommended actions to protect workers, is used particularly for infrequently performed jobs where hazards may not be evident or anticipated . This procedure prompts work planners and supervisors to (1) list potential hazards for each step of the job by identifying the hazardous conditions that could potentially lead to an accident and (2) review all work in the area and adjacent areas to determine how each job or evolution affects workers in the area . All possible factors that may influence safe execution of the job, including chemical and biological hazards, would be considered and appropriate worker protection measures would be employed during performance of the work.

During July 2011, samples were collected in the PBAPS A and B cooling towers and tested for Legionella. Although there was no site-specific concern to trigger testing at that time, the testing was performed as part of the normal Industrial Hygiene monitoring program. No Legionella bacteria were detected.

In June 2012, an industrial hygiene consultant was engaged to evaluate whether additional Legionella testing in the PBAPS cooling towers should be pursued. The consultant advised against such testing because the PBAPS circulating water system draws water directly from Conowingo Pond and returns the water after a single pass through the condensers with no recirculation. As a result, if Legionella bacteria were discovered in water samples from the cooling towers its source would likely be Conowingo Pond rather than the cooling towers themselves, making any treatment to eliminate bacteria in the cooling towers essentially ineffective. Additionally, because Conowingo Pond is not a stagnant water source, the likelihood of Legionella bacteria growth in the Pond was characterized as low. Based on this advice, PBAPS personnel decided that further testing for Legionella in the cooling towers was unwarranted.

When working in most PBAPS cooling tower areas, general work area personal protective equipment (PPE) is typically assigned. This always includes hard hat and safety glasses, and it may include gloves, hearing protection and protective footwear based on the tasks being performed. No special respiratory protection is required.

However, under the PBAPS PPE voluntary-use program, workers may choose to use MH-7

8 respiratory protection as a personal option. Also, some areas of the cooling tower structures are considered "Permit-Required Confined Spaces." Entry into these areas requires a special work permit in which job-specific PPE would be identified, and the possible presence of Legionella bacteria would be a consideration.

References:

NONE MH-8

ENCLOSURE A Peach Bottom Atomic Power Station, Units 2 & 3 Responses to NRC Subsequent License Renewal Environmental Review Requests for Additional Information SITE PROCEDURES RELEVANT TO ENVIRONMENTAL IMPACTS SP-1

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SP-1 Category: Site Procedures ER Section: Not Applicable Statement of Question:

In several instances, the ER (e.g., Section 3.7.2, p. 3-62; Section 4.6.1.1, p. 4-29; Section 4.6.3, p. 4-42; etc.) states that existing site procedures provide a process for screening proposed activities to determine if environmental impacts will occur that would require further evaluation.

a) Briefly summarize the following site procedures: 1) EN-AA-103, "Environmental Review"; 2) EN-AA-103-0001, "Environmental Evaluations"; and 3) SA-AA-117, "Excavation, Trenching, and Shoring". Include the associated actions and describe how these procedures ensure that environmental impacts are appropriately addressed prior to beginning work or during projects that involve land-disturbing activities that could affect previously unidentified archaeological or historic resources, that could disturb or degrade terrestrial or aquatic habitats, or that could otherwise result in environmental impacts.

b) How does Exelon ensure that personnel or consultants conducting land-disturbing activities or other activities that could result in environmental impacts are aware of site procedures and what actions those procedures require them to take?

Response

a) A short description of each Exelon Generation procedure identified in this RAI is provided below.

1. EN-AA-103, Environmental Review This procedure provides a process for screening proposed activities to determine if they require further evaluation for environmental impacts and risk. Activities for which the screening must be documented include, but are not limited to:

Engineering Configuration Changes Operational Changes Procedure Changes Maintenance Activities involving a permanent change to the facility An environmental screening checklist describing the characteristics of activities that suggest a need for further evaluation prior to acting is used. The initiator of the activity is responsible for ensuring that the screening is performed. If the proposed activity involves any of the listed items on the checklist (i.e., any checklist item is answered "Yes"), then an Environmental Review would follow.

The purpose of an Environmental Review is to identify specific environmental requirements needed to perform the activity and ensure that fulfilment of such requirements is incorporated into planning for the activity. As part of this process, an Environmental Evaluation, conducted by Exelon Nuclear Environmental personnel under EN-AA-103-0001, may be indicated.

Examples of checklist items pertinent to identifying whether an activity could affect previously unidentified archaeological or historic resources, or could disturb or degrade terrestrial or aquatic habitats include the following:

SP-2

Purchase, lease or sale of any land or property Increase in the maximum reactor power level (power uprate)

Affect operations of fish hatcheries, recreational areas, parks, or other public domains

• Cooling towers or cooling lakes Storm drains, wetlands, ditches or swales (e.g., changes to culverts, removal/addition of vegetative cover, changes to grade, blocking storm water pathways)

Construction, demolition or abandon in place of any site or non-generating facility buildings or structures Dredging or silt removal from intake structures or other structures (e.g., cooling towers, Iowa vanes)

• Potential impacts to or disturbance of habitat, wildlife or vegetation (other than landscaping) on the site or non-generating facility property (e.g., trapping, hunting, extermination, fish electroshock)

• Land disturbance >1 acre (e.g., excavation, tilling, clearing away top layer of dirt for construction of building, etc.), well drilling, soil boring or change to storm water runoff (i.e., increase or decrease to paved surfaces)

Increase in surface water or groundwater withdrawal or increased withdrawal pump run times Changes in the amount of water or effluent location discharging to the environment Work near or in waterways/wetlands with the potential to impact the waterways/wetlands or work not on impervious surfaces Land disturbance (except on-going farming activities) that involves grading, paving/repaving, construction of foundations, excavations, re/de-forestation, landscaping, placement of any fill or spoil, or similar activities that disturb any previously undisturbed land or potential wetland areas

2. EN-AA-103-0001, Environmental Evaluations This procedure provides guidance to Exelon Nuclear Environmental personnel on performing further environmental evaluations to better identify the environmental and regulatory impacts, if any, of proposed activities. If an environmental evaluation concludes that implementation of a proposed activity would result in an unacceptable environmental condition or risk, then the proposed activity will not be implemented until the environmental impact(s) is I are addressed. In such circumstances, Environmental personnel will work jointly with the individual(s) responsible for the proposed activity to identify acceptable alternatives or modifications to the proposed activity that resolve the Environmental lmpact(s).

3. SA-AA-117, Excavation, Trenching, and Shoring This procedure provides instructions on safe work practices for excavating, trenching, and shoring, including instructions on actions to be taken if cultural, historic, or paleontological resources are inadvertently discovered during an activity involving excavation or trenching .

If Cultural, Historic or Paleontological resources are uncovered during excavation activity, then the procedure specifies the following steps to be performed by the work supervisor:

SP-3

STOP work, PLACE work area in a safe condition, NOTIFY Competent Person, Site Excavation Coordinator, Work Control Center, Environmental personnel and Plant Operations.

COVER the resources with a tarp or other suitable covering to protect from the elements.

CONTROL personnel and vehicle access through the area by placing barriers and I or posting signs.

Work shall not resume until the Cultural, Historic, or Paleontological resources have been salvaged or otherwise dispositioned, and Environmental personnel authorize work to resume.

b) Exelon ensures that employees conducting land-disturbing activities are aware of the procedures and what actions to take if historic resources are discovered through job training, pre-job briefs before work is started, procedural compliance, and implementation of management controls, including supervisory oversight of work groups and contractors.

References:

NONE SP-4

ENCLOSURE A Peach Bottom Atomic Power Station, Units 2 & 3 Responses to NRC Subsequent License Renewal Environmental Review Requests for Additional Information SOCIOECONOMICS SOC-1

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SOC-1 Category: Socioeconomics ER Section: 3.8.1 .1 Statement of Question:

Section 3.8.1.1 of the ER provides property tax payment and payments in addition to tax (PATs)

Exelon makes to taxing authorities. The ER states that in 2012, Exelon Generation and the taxing authorities agreed to extend a 2008-2012 settlement agreement, which included PATs to each local taxing body, to cover tax years 2013 to 2017.

a.) Has there been new or additional settlement agreements between Exelon and taxing authorities that cover the tax years beyond 2017? If a settlement agreement has been reached, provide a summary of the agreement. If a settlement agreement has not been reached, please provide a brief summary of the status of ongoing negotiations or dialogue concerning a potential agreement.

b.) Are there any potential future tax payment adjustments anticipated during the SLR period? If known, please provide future tax payment adjustments.

Response

a.) The payment in lieu of tax ("PAT") agreement between PBAPS and the taxing jurisdictions expired in 2017. Since expiration of the PAT agreement, the parties have engaged in continuing negotiations, but have been unable to reach a new agreement thus far. As the parties attempt to negotiate a new PAT agreement, the property tax value for PBAPS is being litigated. Although the exact timing is currently unknown, Exelon Generation anticipates that a new PAT agreement will be reached with the taxing jurisdictions in due course. Historically, the PAT agreement covers only the tax parcels containing PBAPS Units 2 and 3, also known as the power block parcels.

b.) While Exelon Generation expects that there will be tax payment adjustments for PBAPS in the future , including during the second period of extended operation, no predictions have been made regarding the magnitude of such adjustments.

References:

NONE SOC-2

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SOC-2 Category: Socioeconomics ER Section: 3.8 Statement of Question:

The ER and Tables 3.8-6 and 3.8-7 identify that Exelon pays PATS and/or real estate tax to York County, South Eastern School District, Peach Bottom Township, Lower Chanceford Township, and Red Lion School District. Peach Bottom Units 2 and 3 are located in York County within Peach Bottom Township and the South Eastern School District serves Peach Bottom Township. Clarify if and why Exelon pays real estate tax to Lower Chanceford Township and Red Lion School District as a result of operations of Units 2 and 3. If not:

a.) Discuss why real estate tax payments to the Lower Chanceford Township and Red Lion School District were included in Tables 3.8-6 and 3.8-7.

b.) Revise Tables 3.8-6 (last row, "Approximate 2016 Peach Bottom Real Estate Taxes and PAT(% of 2016 Property Tax)") and Table 3.8-7 of the ER to reflect property tax paid to York County, South Eastern School District, and Peach Bottom Township as a result of Units 2 and 3.

Response: [Combined response to items a) and b)]

Exelon Generation has reviewed the information concerning real estate tax and PAT payments to the Lower Chanceford Township and Red Lion School District that was provided previously in the PBAPS SLR-ER Tables 3.8-6 and 3.8-7. It has been determined that the payments to the Lower Chanceford Township and Red Lion School District were mistakenly reported in Tables 3.8-6 and 3.8-7 because they are billed to Exelon Generation by York County on the same invoices as are the amounts due for the land parcels that compose the PBAPS site. However, the nexus between operation of PBAPS Units 2 and 3 and the activities conducted by Exelon Generation on the land parcels located in Lower Chanceford Township and Red Lion School District is presently undetermined. Revised versions of PBAPS SLR-ER Tables 3.8-6 and 3.8-7 are being provided, which report only payments made to York County, South Eastern School District, and Peach Bottom Township that are attributable to land parcels composing the PBAPS site.

References:

Revised Table 3.8-6, Local Government Real Estate Tax Revenue for PBAPS Units 2 and 3 Revised Table 3.8-7, Property Taxes and PATs Paid by Exelon to Local Taxing Authorities The revised tables are incorporated into this response for ease of reference.

SOC-3

TABLE 3.8-6 LOCAL GOVERNMENT REAL ESTATE TAX REVENUE FOR PBAPS UNITS 2 AND 3 South Eastern Peach Bottom York County Real Year School District Real Township Real Estate Tax (al Estate Tax (bl Estate Tax (cl 2012 $110,850,508 $27, 731, 185 $960,398 2013 $120,983,495 $28,288, 193 $979,235 2014 $121,948,272 $28,913, 137 $1,071,752 2015 $122,824,563 $29,603, 194 $1,081,908 2016 $140,372,010 $30,276,444 $1,196,269 Approximate 2016 Peach Bottom Real Estate Taxes and PAT(% of 2016 $237,000 (0.17%) $1,168,800 (3.86%) $36,500 (3.05%)

Property Tax)

Revised 12/10/2018 (a) York County, PA Comprehensive Annual Financial Reports

• Available here for download in PDF format:

https://yorkcountypa.gov/county-administration/budget-and-finance/comprehensive-annual-financia 1-reports.htm I (b) Southeastern School District, Pennsylvania -Annual Budget and Financial Reports

• Available here for download in PDF format:

http ://www.sesdweb.net/school board/financial statements (c) Telephone conversation with Peach Bottom Township

• Peach Bottom Township Tax Collector- Catherine M . Bilger Office Hours - Tuesday & Thursday 2 p.m. to 4 p.m.

Phone: 717-456-7179 SOC-4

TABLE 3.8-7 PROPERTY TAXES AND PATS PAID BY EXELON TO LOCAL TAXING AUTHORITIES Peach Tax Year (School South Eastern York County Bottom Total Tax &

District/ County & School Tax Paid 1 PAT Township PAT Township) District PAT PAT 2012-201312013 $800,000 $144,000 $28,570 $428,641 $1,401,211 2013-2014 / 2014 $800,000 $144,000 $28,570 $440,601 $1,413,171 2014-201512015 $800,000 $144,000 $28,570 $450,705 $1,423,275 2015-201612016 $800,000 $144,000 $28,570 $469,730 $1,442,300 2016-2017 / 2017 $800,000 $144,000 $28,570 $476,607 $1,449,177 1

Tax is paid to York County, South Eastern School District, and Peach Bottom Township SOC-5

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SOC-3 Category: Socioeconomics ER Section: Table 3.8-7 Statement of Question:

Table 3.8-7 lists "TBD" for 2017 Tax Paid. Is the 2017 Tax Paid and Total Tax & PAT information available as a result of operation of Units 2 and 3? If so, please provide.

Response

A revised version of Table 3.8-7, Property Taxes and PATs Paid by Exelon to Local Taxing Authorities, is provided with the response to RAl-SOC-2. The revised table includes 2017 tax and PAT payment information.

References:

NONE SOC-6

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SOC-4 Category: Socioeconomics ER Section: 3.8-7 Statement of Question:

Table 3.8-7 provides a School District PAT (2nd column). Identify the school district(s) the PAT is provided to.

Response

The PAT is paid to the Southeastern School District.

References:

NONE SOC-7

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SOC-5 Category: Socioeconomics ER Section: Table 3.8-6 Statement of Question:

Identify the source/reference for the local real estate tax revenue information presented in Table 3.8-6 of the ER for Peach Bottom Township and Lower Chanceford Township.

Response

The source/reference for the local real estate tax revenue information presented in Table 3.8-6 of the ER for Peach Bottom Township is as follows:

Peach Bottom Township Tax Collector- Catherine M. Bilger Office Hours - Tuesday & Thursday 2 p.m. to 4 p.m.

Phone: 717-456-7179 It has been determined that payments to the Lower Chanceford Township were mistakenly reported in Tables 3.8-6. Accordingly, information about Lower Chanceford Township has been removed from the table.

References:

NONE SOC-8

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SOC-6 Category: Socioeconomics ER Section:

Statement of Question:

Besides property tax payments and PATs, describe any other sizeable annual support payments (e.g., emergency preparedness fees and payments or fees because of the independent spent fuel storage installation), one-time payments, or other forms of non-tax compensation (if any) provided to local organizations, communities, and jurisdictions on behalf of PBAPS.

Response

PBAPS and its employees support various educational, community and charitable organizations through monetary donations, in-kind gifts and volunteering. PBAPS is a major sponsor of the York County Science and Engineering Fair, the Mason-Dixon Fair, the Delta-Cardiff Heritage Festival and South Eastern Dollars for Scholars.

In 2017, Peach Bottom and its employees donated more than $460,000 to local organizations. Some of these organizations include:

• Delta Area Senior Center

• Delta-Cardiff Volunteer Fire Co.

• Four Diamonds - Conquering Childhood Cancer

• Junior Achievement of South Central Pennsylvania

• Mason-Dixon Business Association

• Mason-Dixon Community Services

• York County Conservation District

• Southern York County Emergency Medical Services

• Signature Events/ Key Sponsorships

References:

NONE SOC-9

ENCLOSURE A Peach Bottom Atomic Power Station, Units 2 & 3 Responses to NRC Subsequent License Renewal Environmental Review Requests for Additional Information SPECIAL STATUS SPECIES AND HABITATS SS-1

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SS-1 Category: Special Status Species and Habitats ER Section: Appendix C Statement of Question:

In Appendix C of the ER, Exelon includes Pennsylvania Natural Diversity Inventory Environmental Review Tool results related to the proposed Peach Bottom SLR. On page 4 of these results, Exelon states that the project will affect 1 to 39 acres of forests, woodlots, and trees in response to Q5: 'The proposed project is in the range of the Indiana bat.

Describe how the project will affect bat habitat (forests, woodlots, and trees) and indicate what measures will be taken in consideration of this. Round acreages up to the nearest acre (e.g., 0.2 acres= 1 acre)."

a) Further describe the impacts to forests, woodlots, and trees that would result from site maintenance, hazardous tree removal, and other potential impacts during the proposed SLR term.

b) Clarify how many acres of forests, woodlots, and trees Exelon anticipates would be affected during the proposed SLR term.

c) Describe any applicable procedures and/or best management practices that Exelon maintains that would minimize or eliminate potential impacts to bats during hazardous tree removal and other site maintenance activities that affect trees or forested areas.

Response

a) Vegetation control at Peach Bottom Atomic Power Station is the responsibility of the Facilities Maintenance Department. The following guidelines are used as the basis of operation for this activity. Although changes to this program may be made in the future, Exelon Generation expects similar maintenance activities to continue during the SLR period of extended operation.

• Regular - "weekly yard areas" are generally mowed on a regular basis to maintain a height of 6" or less. (e.g., Site Management Building yards, Training building, Helipad, ISFSI Pad, Parking lot medians, along walkways)

• Secondary- "monthly or more frequently as needed" (e.g., Cooling Tower Islands, Low Level Radwaste, Outer Parking Lot hillsides) are mowed/weed whacked less frequently to maintain vegetation at 12" to 16" or less. Security supervision contacts Facilities Maintenance if the vegetation becomes overgrown to a point that it may hinder their activities.

• Transmission Lines - These areas have a yearly scheduled preventive maintenance task (PM) for a walk down that is completed by PECO/Asplundh.

This includes transmission lines that go from the Plant to the Substations and all lines leading from the Substations to offsite locations. Asplundh provides the information from the walkdown to PECO and Exelon. PECO takes care of anything from the substations out. Facilities Maintenance will mow under powerlines that lead from the plant to the substations as needed, usually 3 times a year, Exelon has a contract with Asplundh to remove any trees that would be considered a threat to the transmission lines. Exelon has a yearly PM to contract with Weeds Inc. for conducting selective herbicide spraying once a year on the powerline rights-of-way that lead from the plant to the substations on the "cliff' areas, where mowing is not possible. This allows low growing grasses to grow to SS-2

prevent erosion . Brush/tree removal is also performed in the "cliff' area for Security.

• Outlying - These areas include Owner-Controlled-Area Property, Main Stack, Salt Shed, and Field/Meadow Areas. These areas are mowed as needed for work access, security inspections, or noxious weed control. Some of the Meadow areas are mowed monthly to provide food plots, some yearly and some areas every 2 years, this is a recommendation from the PA Game Commission for wildlife habitat.

• Less developed - Less developed, unsurveyed areas of station property not encompassed in the areas previously described are maintained only in response to special requests. Selective removal of invasive species, such as trees of heaven, phragmities, mile a minute is completed as time permits.

Note: The frequency of mowing activities is subject to weather, other work load, plant priorities, and staffing levels.

Whatever tree removal that may occur under the Vegetation Management Program would take place only around the margins of existing forest areas as part of ongoing activities to maintain clearances and remove hazardous trees near facilities. Thus, such activities are not expected to substantially reduce the size of currently forested areas on the site or result in additional habitat fragmentation .

b) Based on the selective nature of tree removals under the Vegetation Management Program, Exelon Generation does not expect future clearing of trees to affect any land parcel that would exceed 39 acres in size.

c) Exelon Generation has not adopted procedures or Best Management Practices for the PBAPS site that are specifically intended to minimize or eliminate potential impacts to bats.

References:

NONE SS-3

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SS-2 Category: Special Status Species and Habitats ER Section: Appendix C Statement of Question:

With respect to the bog turtle, confirm that Exelon, its personnel, or contractors have not identified any onsite wetlands beyond those that were assessed during the August 2017 Phase 1 bog turtle habitat survey contained in Appendix C of the ER.

Response

As is stated in Section 3.6.2.1 of the Environmental Report, a review of the USFWS Wetlands Mapper V2 showed that, with the exception of the cooling water discharge basins, there are no mapped wetland habitats at PBAPS. Because the USFWS Wetlands Mapper V2 review and the bog turtle survey are the only relevant onsite wetlands investigations of which Exelon Generation is aware, Exelon Generation confirms that its personnel and contractors have not identified other onsite wetlands.

References:

NONE SS-4

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SS-3 Category: Special Status Species and Habitats ER Section:

Statement of Question:

With respect to the Chesapeake logperch (Percina bimaculata) which is under review by the U.S. Fish and Wildlife Service, the ER (Section 4.6.3, p. 4-42) states that in 2016, four individual Chesapeake logperch larvae were collected in entrainment abundance sampling that Exelon is currently conducting pursuant to the Clean Water Act Section 316(b) requirements in the Peach Bottom NPDES permit. Describe whether any additional Chesapeake logperch have been collected in 316(b) sampling since development of the ER. Include the life stage and condition (i.e., alive, injured, or dead) for any collected individuals.

Response

An impingement latent mortality study was conducted at the PBAPS outer intake structure from October 2017 through October 2018. The study consisted of 20 sampling events. During this sampling effort one Chesapeake Logperch was collected on November 1, 2017. The single adult Chesapeake Logperch was 85 mm in total length and weighed 5.9 g. The individual was released alive back into Conowingo Pond . The collection of this individual was reported to PA Fish and Boat Commission. In addition, Exelon conducts annual fall intake screen sampling. No Chesapeake Logperch were collected during this sampling in 2017 or 2018.

References:

NONE SS-5

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-SS-4 Category: Special Status Species and Habitats ER Section: 4.6.2.1.3, 4.6.3 Statement of Question:

The ER (Section 4.6.2.1.3, p. 4-35 and Section 4.6.3, p. 4-43) states that a final decision regarding additional measures to protect federally listed, State-listed, and fragile species will be made in consultation with the Pennsylvania Department of Environmental Protection and the U.S. Fish and Wildlife Service in the context of the next Peach Bottom NPDES permit renewal process. Please describe the current timeline for the NPDES permit renewal and any current discussions with the State or the U.S. Fish and Wildlife Service regarding federally listed, State-listed, and fragile species.

Response

The PBAPS NPDES permit renewal application is on track for submittal to PADEP no later than March 30, 2019. As is explained in the Response to RAl-A-3, PBAPS is in the process of completing collection and analysis of biological data that must be submitted with the NPDES permit renewal application. After that submittal, the study reports will become available to other appropriate agencies, such as the USFWS and the National Marine Fisheries Service (NMFS}, through their participation in the NPDES permit renewal process.

In February 2016, Exelon Generation provided the USFWS and NMFS with copies of proposed monitoring and sampling studies planned to ensure compliance with the Clean Water Act§§ 316(a) and (b). A list of historical studies relating to the interaction of the PBAPS thermal discharge with the Susquehanna River was also provided .

In April 2016, PBAPS personnel met with representatives of the USFWS and NMFS to discuss the station's plan for compliance with CWA §§316(a) and (b). At that time studies were just beginning. The USFWS was provided a tour of the PBAPS outer intake structure and discharge canal. However, data results and compliance technologies were not discussed. Subsequently, USFWS and NMFS provided comments on the Study Plan for Post-EPU Thermal and Biological Monitoring and the Entrainment Abundance and Latent Impingement Mortality Characterization, and those plans were adjusted in response to the comments.

A Final Report for the Post-EPU Thermal and Biological Monitoring Study was published in February 2017 and submitted to the PADEP in accordance with NPDES Permit No.

PA0009733. PADEP informed USFWS of the Final Report's availability. Exelon Generation expects that, through the NPDES permit renewal process, USFWS and NMFS will continue to participate in PADEP's decision-making process with respect to CWA §§ 316(a) and (b) compliance by PBAPS.

Through an annual traveling screen sampling program for juvenile American shad, PBAPS has for more than 30 years supported the Susquehanna River Basin Anadromous Fish Restoration Cooperative (SFAFRC) efforts to evaluate migratory fish restoration in the Susquehanna River Basin. Since 2016, sampling for certain other selected species, including American eel and river herring, have also been included in SS-6

the program. SFAFRC is composed of partners from federal and state agencies, including USFWS, Susquehanna River Basin Commission, Pennsylvania Fish and Boat Commission, Maryland Department of Natural Resources, and New York State Department of Environmental Conservation. For purposes of CWA §316(b), American shad is defined by the U.S. Environmental Protection Agency as a "fragile species."

On June 6, 2018, Exelon Generation participated in a meeting between NRC, NMFS, and USFWS to discuss data needs to support efficient Essential Fish Habitat and Endangered Species Act Section 7 consultations for the PBAPS Second License Renewal project.

References:

NONE SS-7

ENCLOSURE A Peach Bottom Atomic Power Station, Units 2 & 3 Responses to NRC Subsequent License Renewal Environmental Review Requests for Additional Information TERRESTRIAL RESOURCES T-1

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-T-1 Category: Terrestrial Resources ER Section: 3.6.2.3.2 Statement of Question:

The ER (Section 3.6.2.3.2, p. 3-52) references the "Atom Woods Road Site" and "Peach Bottom Woods Site" when describing the occurrences of several State-listed or rare species within the footprint of the Peach Bottom site. These sites are further described in the York County Natural Areas Inventory (ER reference "YCPC 2004").

a) Describe where these sites lie in relation to the entire Peach Bottom site footprint. Provide a map depicting these area, if available.

b) Does Exelon actively manage these areas for conservation or restoration purposes?

c) Does Exelon anticipate any land or ground disturbances to these area during the proposed SLR term?

Response

T-1a:

Peach Bottom Woods is in the southern portion of the PBAPS site on the slope between the discharge canal and the South Substation.

Atom Road Woods extends from west of the PBAPS site along Atom Road, with only the eastern tip of the natural area within the western portion of the PBAPS site where Atom Road crosses onto the site.

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T-1b:

Vegetation is not actively managed in the Atom Road Woods or Peach Bottom Woods areas, although selective removal of invasive species may occur as time permits or in response to special requests.

T-1c:

Exelon Generation does not anticipate land or ground disturbance to the Atom Road Woods or Peach Bottom Woods areas during the period of extended operation.

The only substantial construction project that has been identified as possible in the long-term future for the PBAPS site is construction of a second ISFSI. If it occurs, such a project may require removal of as much as 5 acres of trees, but none of the initially identified candidate locations are in the Atom Road Woods or Peach Bottom Woods area.

References:

NONE T-3

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-T-2 Category: Terrestrial Resources ER Section: Not Applicable Statement of Question:

The Natural Resources Conservation Service identifies the following 12 invasive plants in Pennsylvania as noxious weeds, which are plants that directly or indirectly cause damage to crops, livestock, irrigation, navigation, the public health, or other natural resources:

a.) musk thistle (Carduus nutans) b.) Canadian thistle (Cirsium arvense) c.) bull thistle (Cirsium vulgare) d.) jimsonweed (Datura stramonium) e.) goatsrue (Galega officinalis) f.) giant hogweed (Heracleum mantegazzianum) g.) purple loosestrife (Lythrum salicaria) h.) mile-a-minute (Polygonum perfoliatum) i.) kudzu-vine (Pueraria montana) j.) multiflora rose (Rosa multiflora) k.) shattercane (Sorghum bicolor)

I.) johnsongrass (Sorghum halepense)

Is Exelon aware of the occurrence of any of these plants on the Peach Bottom site? If so, does Exelon actively perform maintenance to control any of these plants?

Response

As section 3.6.2.2, Invasive/Non-Native Terrestrial Species, states, "there are no documented surveys available at the PBAPS site for the presence of terrestrial plant species listed on the Pennsylvania State-listed Noxious Weeds list (USDA 2016b; PA DCNR 2016b) or the Federal Noxious Weeds list (USDA 2016a)." However, according to the PBAPS Vegetation Management Program (see response to RAl-SS-1.a), "Selective removal of invasive species, such as trees of heaven, phragmities, and mile a minute [in outlying areas for which there is no scheduled vegetation removal] is completed as time permits" [emphasis added)] . This indicates that PBAPS and vegetation management contractor personnel are aware of the presence of mile-a-minute (Polygon um perfoliatum) on the PBAPS site. These personnel have also observed other noxious weeds on the list (e.g., multiflora rose (Rosa multiflora)), but such observations have not been documented, and the PBAPS Vegetation Management Program does not specify active measures to control them.

References:

NONE T-4

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-T-3 Category: Terrestrial Resources ER Section: Not Applicable Statement of Question:

Please identify and describe the various environmental stewardship or habitat enhancement initiatives that Exelon has undertaken or plans to undertake on the Peach Bottom site, such as the white-tailed deer management program; initiatives to benefit native pollinators, nesting roosts for raptors; nesting boxes for various waterfowl and songbirds; wildlife food plots within transmission line rights-of-way; etc. These initiatives may be formal or informal.

Response

PBAPS implements a White-tailed Deer Management Program, which works to maintain and improve deer population through management and hunting, as well as providing a deer food plot that contains several acres of clover, hay, corn, and winter rye. Under the program, an employee may be approved to use a bow-and-arrow to hunt deer in one of 13 designated hunting areas on the site during specified hunting seasons. The program prevents over population of white-tailed deer, which was leading not only to wildlife habitat degradation but also to unsafe vehicle driving conditions on roadways surrounding PBAPS.

PBAPS also has a 20'x50' pollinator garden containing a pollinator wildflower mix and pollinator bushes. Ten solitary bee hives have also been placed throughout the site to encourage pollination.

Nesting roosts for both bald eagles and ospreys have been installed and are monitored at PBAPS.

As part of the Vegetation Management Program (see response to RAl-SS-1 ), some outlying meadow areas on the PBAPS site are mowed monthly to provide wildlife food plots. Others are mowed annually, and some are mowed every 2 years, based on a recommendation from the PA Game Commission for improving wildlife habitat.

References:

NONE T-5

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-T-4 Category: Terrestrial Resources ER Section: Not Applicable Statement of Question:

Describe Exelon's hunting program for the Peach Bottom site, including what year the program was initiated; the purpose of the program; the typical length of the hunting season; hunter permit requirements and limits; and any changes in natural habitats that Exelon has observed over time as a result of implementing the program.

Response

PBAPS has sponsored its deer management program since 2013. The Peach Bottom Quality Deer Management Program Hunting Policy was established in consultation with the Pennsylvania Game Commission to control an excessive population of white-tailed deer that was causing both wildlife habitat degradation on the PBAPS site and unsafe vehicle driving conditions on roads near the PBAPS site.

Hunting dates are set each year and vary according to the Pennsylvania Game Commission deer hunting seasons and the PBAPS Outage schedule.

Prerequisites for hunters include the following:

1. Hunters must be full time Exelon employees stationed at Peach Bottom.

2. Hunters are chosen each year through a lottery process. To qualify for entry into the drawing, the individual must demonstrate proficiency with their bow.

3. All hunters must have current Pennsylvania hunting licenses and abide by the Pennsylvania Game Commission regulations.

4. All hunters are required to sign the 'Waiver and Release of Liability" form prior to accessing areas and hunting.

5. All hunters are required to volunteer for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> every year after to assist the PBAPS Deer Management Committee in the preparation of the hunting areas for the season, trim trails, mark property lines, and perform community service.

Also, hunting is only allowed using a bow in designated areas, and a harvest quota for the PBAPS site is determined each year in consultation with the Pennsylvania Game Commission. For each hunter, there is a restriction of two antlerless deer per hunter and one antlered deer per hunter following Pennsylvania Game Commission regulations.

The hunter must possess valid deer tags for the current season.

The PBAPS Deer Management Program has reduced the number of deer in the site vicinity by approximately 75 percent since its inception, which has lowered the number of vehicle collisions with deer, and wooded habitat on the site appears to be recovering because of a reduced deer population. An Amish neighbor to the PBAPS site reported to the Pennsylvania Game Commission that damage to his crops caused by deer was meaningfully reduced between 2013 and 2015, and nearby orchard owners have observed similar results.

References:

NONE T-6

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-T-5 Category: Terrestrial Resources ER Section: Not Applicable Statement of Question:

Please answer the following questions related to Exelon's Wildlife Habitat Council certification for the Peach Bottom site.

a.) What programs or initiatives has Exelon undertaken related to this certification?

b.) What are the effective dates of the current certification period?

c.) Does Exelon intend to maintain certification during the proposed SLR term?

Response

a.) Programs that contributed to PBAPS being qualified for WHC certification include:

• The White-tailed Deer Management Program and the installation of the deer food plot;

• Selective mowing in Meadow areas to provide wildlife food plots;

• Creation of pollinator gardens;

• Placement of solitary bee hives; and

• Placement of bald eagle and osprey nesting roosts.

b.) The current WHC certification expires December 31, 2018, and the renewed certification received in August 2018 is effective through December 31, 2020.

c.) Exelon Corporation (Exelon) is committed to continually improving its environmental performance. Accordingly, it is Exelon's policy that its facilities comply with applicable environmental laws, regulations, and other commitments with the objective of moving beyond compliance. Exelon has been a member of the Wildlife Habitat Council (WHC) since 2005 and , obtaining the Wildlife Habitat Silver Certification from the WHC, which is a voluntary program that exceeds regulatory requirements, is one option available to Exelon facilities, including PBAPS, for adhering to this company policy. During the second license renewal term, PBAPS will continue its adherence to company policy through regular evaluation and implementation of available options, which may include maintaining the Wildlife Habitat Certification .

References:

NONE T-7

ENCLOSURE A Peach Bottom Atomic Power Station, Units 2 & 3 Responses to NRC Subsequent License Renewal Environmental Review Requests for Additional Information WASTE MANAGEMENT WM-1

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-WM-1 Category: Waste Management ER Section:

Statement of Question:

Peach Bottom is subject to the reporting provisions of 40 CFR Part 110 as it relates to the discharge of oil in such quantities as may be harmful pursuant to Section 311(b)(4) of the Federal Water Pollution Control Act. Any discharges of oil in such quantities that may be harmful to the public health or welfare or the environment must be reported to the National Response Center. For the time period of 2013-2018, were there any reportable spills? If so, please provide a description of any spills.

Response

All spills of fuel/oil and hazardous chemicals at the PBAPS site are recorded and reviewed in accordance with PBAPS procedure SE-6, "Pollution Incident/Hazardous Substance Spill Procedure," to determine whether reporting is required pursuant to any of the following:

40 CFR Parts 110-112, 302, and 355 PA Title 25, Chapter 245 44 CFR 172.101, Appendix A 10 CFR 50.72(b)(2)(xi)

A review of recorded spill incidents for the period from 2013 through October 2018 revealed that no reportable spills of fuel/oil or hazardous chemicals occurred during that time.

References:

NONE WM-2

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-WM-2 Category: Waste Management ER Section:

Statement of Question:

Peach Bottom is subject to the reporting provisions of Pennsylvania Department of Environmental Protection Regulatory Code, 25 PA Code Chapter 245, which requires that reportable releases of oils and other similar hazardous substances be reported to the Pennsylvania Department of Environmental Protection. For the time period of 2013-2018, were there any reportable spills? If so, please provide a description of any spills.

Response

See response to Question RAl-WM-1

References:

NONE WM-3

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-WM-3 Category: Waste Management ER Section: 2.2.2 Statement of Question:

In Section 2.2.2 of the ER, Exelon states that the Independent Spent Fuel Storage Installation (ISFSI) storage pad is projected to be full by the year 2020. While spent fuel storage expansion is expected regardless of SLR, please provide the current plan to address ISFSI expansion and future spent fuel storage in general.

Response

To accommodate storage of spent fuel at the PBAPS site through the end of the currently licensed terms of PBAPS Units 2 and 3, which expire in 2033 and 2034 respectively, the existing ISFSI is being expanded by construction to be completed in 2019. The additional storage pad and supporting facilities are under construction adjacent to the existing pad in accordance with 10 CFR Part 72 requirements and site-specific design considerations set forth in the Holtec HI-STORM FW Cask System Final Safety Analysis Report.

Spent fuel management beyond 2034 may be either at a second onsite storage facility or at a licensed offsite facility if one becomes available. Since less than 5 acres would be required, the PBAPS site has adequate space that could be used for a second ISFSI if one is needed.

References:

NONE WM-4

Peach Bottom Atomic Power Station NRC Request for Additional Information - Response Sheet Question: RAl-WM-4 Category: Waste Management ER Section:

Statement of Question:

Please provide the latest complete Offsite Dose Calculation Manual.

Response

Revision 16 of the PBAPS Offsite Dose Calculation Manual was submitted to the NRG as Appendix Bin the 2017 PBAPS Radiological Effluent Release Report. It is available in the NRC's ADAMS database using Accession# ML18116A324.

References:

NONE WM-5