ML12276A486

Entergy Pre-Filed Evidentiary Hearing Exhibit ENT00575B, GZA Geoenvironmental, Inc., Final IPEC Quarterly Long-Term Groundwater Monitoring Report, Quarters One Through Four 2011 (Sept. 26, 2012), Figures 5A and 6-Q1

ML12276A486
Person / Time
Site:	Indian Point
Issue date:	09/17/2012
From:	GZA GeoEnvironmental
To:	Atomic Safety and Licensing Board Panel, Energy Northwest, Entergy Nuclear Operations
SECY RAS
References
RAS 23566, 50-247-LR, 50-286-LR, ASLBP 07-858-03-LR-BD01
Download: ML12276A486 (4)

Text

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I-2 U3-3 U3-2 U3-1 RW-1 MW-67 MW-66 MW-37 MW-36 MW-35 MW-34 MW-33 U3-4S U3-4D MW-52 MW-51 MW-50 MW-49 MW-47 MW-46 MW-45 MW-44 MW-42 MW-41 MW-38 MW-32 MW-31 MW-40 MW-48 MW-43 MW-39 U3-T2 U3-T1 MW-65 MW-62 MW-60 MW-59 MW-57 MW-56 MW-55 MW-54 MW-53 MW-30 MW-64 MW-61 MW-63 U1-CSS MW-105 MW-101 MW-110 MW-111 MW-112 MW-108 MW-107 MW-58 MW-109 Storage storage Gravel Gravel Storage No Access Grass Earth Parking Asphalt Asphalt curb Asphalt parking Asphalt Concrete curbs Sign Concrete curb Concrete Concrete sidewalk Concrete curb Wooden curb Concrete sidewalk Concrete sidewalk Grass Concrete sidewalk Concrete sidewalk A/C UNIT Handicap ramp Concrete sidewalk Concrete sidewalk A/C unit on concrete Concrete sidewalk Conc. sidewalk Concrete sidewalk Stone curbs Asphalt drive Asphalt parking Asphalt parking Asphalt parking Asphalt parking Asphalt curb Asphalt sidewalk Shrubs Trans.

Asphalt Concrete sidewalk Concrete sidewalk Transformer area and switch gear Storage Containers A/C Units Grass Concrete curb Grass Shrubs Concrete sidewalk Conc. sidewalk Wooden walk Open gr ate Asphalt drive Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt drive Asphalt Asphalt Drive Sidewalk Gravel Gravel Transformer yard Asphalt Drive this Area No Access Asphalt Conc rete Retaining Wa ll Stone retaining wall Concrete sidewalk Gravel parking Concrete sidewalk Gravel parking Gravel parking Gravel parking curbs Stone curbs Stone curbs Asphalt parking Concrete curb Asphalt parking Concrete curb Concrete sidewalk curb pad Asphalt curb Asphalt curb Asphalt parking Grass Asphalt curb Asphalt curb Grass Asphalt curb Asphalt parking sidewalk Concrete Gravel parking Storage Grass Asphalt drive Storage units Gravel Parking lot Asphalt Concrete sidewalk Overhead walkway Concrete curb Asphalt parking Concrete walk Asphalt parking Asphalt Asphalt Asphalt Wood walk Asphalt Concrete walk Concrete pier Courtyard Asphalt Rip-rap Sidewalk Concrete 110 140 120 130 30 30 40 50 30 40 50 90 70 70 80 90 80 80 90 100 110 110 110 110 120 120 100 70 60 70 80 90 60 80 90 100 100 0

110 140 140 Transformer Gravel Covered Concrete Asphalt parking Transformers on raised Concrete Pad Trans.

Transformers Concrete slab Grass Transformers on raised Concrete Pad Concrete Bridge Concrete Bridge Transformer Substation "H" Trailer Trans Asphalt Trans Trans Trans Concrete sidewalk Asphalt Grass Vent pit Mach.

stand Transformers Yard (Gravel)

DISCHARGE OUTFALL CANAL Gravel Shrubs Shrubs Shrubs Overhead Crane Grass FUEL TRAN SFE R PO O L STO RA GE PO O L STO RA GE PO O L FA IL ED FU EL AUX. PO O L DIS ASS EM B LY PO O L CAS K L O AD PO O L CAS K W AS H &

DIS ASS EM B LY ISO L ATIO N PI T PU MP SU CTI ON WELL WATER STO RA GE PO O L ROOF DRAIN ELEVATION 65' 43.8' 43.8' 43.8' 21.75' 22.75' (EL.=0.0) 33' 13' 43.8' 33' 33' 33' 33' 33' 42.5' 42.5' MH-4 MH-4A MH-5 MH-6 MH-2 B6 B6A B5 B4 B4A B3 B3A B2A B2 B1 A2 A1 U3-MH-14 F5 A2A CB-B CB-E CB-F C-1 C-3 D2 B7 B8 CB-33 CB-34 CB-15 CB-14 CB-13 CB-32 CB-31 CB-30 A7 U1-CB-22 U3-CB (U1-CB-10)

CB-29 U3-CB (U1-CB-9)

U1-CB-21 U1-CB-20 CB-28 CB-24 CB-27 E16 E16 E16A CB-6 CB-5A (CB-6)

CB-5B CB-7 CB-5 MH16 CB-3B CB3A CB4 CB-2C CB3 CB-2B CB-2A CB-2 CB-1 MH18 MH8 MH17 MH7 MH23A CB-16 MH9 MH10 MH11 MH22 MH21 MH13 MH3 MH12 MH1 CB-18 MH15 CB-19 CB-23 MH14 C2 E7 E6 E8 E9 E10 E11 E5 E5A E4 E4 E4A E3B E3 E3A F3 F4 CB E2 E2A F6 F7 E2B E2C E1 A6 A5 A3A A3 A4 E14 E15 E15A (U1-CB-8)

AB E13 E12 D1 CB-17 F2 F1 CB-12 MH-23 MH-19 MH-20 ROOF DRAIN Turbine Generator Building 2 Turbine Generator Building 1 Turbine Generator Building 3 Transformer Yard PAB FUEL POOL UNIT 2 1,015' 640' WEST FUEL POOL UNIT 1 UNIT 3 U2-C1 HR-1 U3-C1 OUT-1 4

4 33' UTILITY TUNNEL 33' UTILITY TUNNEL CSS CSS TRENCH 5

6 7

MH-5 U1-NCD U1-SFDS B-1 B-6 8

8.05 9.92 0.41 0.67 5.25 5.96 7.08 8.63 9.20 0.81 0.50 4.51 4.33 3.58 9.25 5.34 4.20 4.25 4.31 3.01 1.31 0.64 5.08 5.17 8.85 5.69 6.86 6.41 8.12 8.22 8.82 9.49 9.02 3.71 7.24 7.36 8.32 7.20 5.55 6.83 5.64 1.04 1.02 1.01 0.88 0.70 1.41 0.03 0.55 0.86 0.51 0.32 7.93 9.23 1.06 1.40 1.07 0.89 0.95 0.61 0.25 0.18 1.61 0.74 0.75 1.39 1.02 0.63 0.94 3.07 0.08 0.74 48.81 15.05 43.19 36.63 34.96 45.52 47.50 10.20 25.01 13.30 47.99 53.73 10.07 10.12

-0.08 31.79 36.77 40.71 39.02 44.17 52.35 50.49 53.61 54.10 56.06 59.35 60.39 34.97 48.19 28.89 29.83 30.67 31.34 31.94 32.20 33.31 36.57 34.13 33.95 37.16 32.91 37.99 29.93 28.35 31.53 30.88 30.15 11.24 11.66 12.03 12.06 11.49 13.13 12.33 10.71 12.07 11.11

-0.86

-0.33

-0.48

-0.63 121.79 6.26 8.81 8.18 4.11 4.89 5.95 5.78 5.61 3.67 3.76 8.61 0.64 6.52 5.34 4.20 2.69 3.74 4.95 1.22 0.76 9.47 9.80 6.71 9.67 8.98 9.59 9.18 2.00 2.19 5.89 2.99 5.17 5.75 6.29 8.22 6.85 7.65 7.29 7.82 9.08 9.38 8.83 1.95 5.24 6.03 6.49 6.07 4.18 5.40 4.05 0.42 0.31 0.82 42.12 11.95 39.59 35.07 34.43 41.21 44.09 11.06 10.27 41.44 48.62

-2.38

-2.07

-0.86

-0.74

-0.50

-1.14 29.33 33.79 37.42 36.03 39.92 45.15 36.67 38.89 39.47 41.65 47.27 54.22 32.72 36.98 22.70 22.33 24.43 24.79 25.12 25.21 25.94 29.87 30.48 31.08 24.82 23.25 33.36 20.16 21.08 20.77 23.10 29.05 12.36 11.53

-0.62

-0.44

-0.08

-1.97

-2.46

-1.49

-3.14

-1.68

-2.08

-0.74

-0.64

-5.66

-3.28

-2.66

-1.33

-1.68

-2.15

-2.03

-1.13

-0.82

-2.86

-1.03

-1.87

-1.62

-0.67

-0.56

-2.42

-1.72

-3.41

-2.99

-1.43

-2.70 113.87

NA NA NA NA NA NA NA 2.28 1.65 9.26 9.15 13.21 53.62 31.16 50.64 58.88 31.61 12.18

-1.14 H U D S O N R I V E R 3.2 12.07 11.55 8.05 9.92 0.41 0.67 5.25 5.96 7.08 8.63 9.20 0.81 0.50 4.51 4.33 3.58 9.25 5.34 4.20 4.25 4.31 3.01 1.31 0.64 5.08 5.17 8.85 5.69 6.86 6.41 8.12 8.22 9.05 8.82 9.49 9.02 3.71 7.24 7.36 8.32 7.20 5.55 6.83 5.64 1.04 1.02 1.01 0.88 0.70 1.41 0.03 0.55 0.86 0.51 0.32 7.93 9.23 1.06 1.40 1.07 0.89 0.95 0.61 0.25 0.18 1.61 0.74 0.75 1.39 1.02 0.63 0.94 3.07 0.08 0.74 15.05 43.19 36.63 34.96 45.52 47.50 10.20 25.01 13.30 47.99 53.73 10.07 10.12

-0.08 31.79 36.77 40.71 39.02 44.17 52.35 50.49 53.61 54.10 56.06 59.35 60.39 34.97 48.19 28.89 29.83 30.67 31.34 31.94 32.20 33.31 36.57 34.13 33.95 37.16 32.91 37.99 29.16 29.93 28.35 31.53 30.88 30.15 11.24 11.66 12.03 12.06 20.46 12.60 11.49 13.13 12.33 10.71 12.07 11.11

-0.86

-0.33

-0.48

-0.63 121.79 Plant North N

N 2nd QUARTER 2011 LONGTERM TRANSDUCER MONITORING EVALUATION MAP

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? LAF-03 LAF-02 LAF-01 H U D S O N R I V E R EASTERN IP1-CB FLOW PATH SOUTH WESTERN IP1-CB FLOW PATH PRIMAR Y

IP1 FL OW P ATH LEGACY IP1 STORM DRAIN FLOW PATH IP1-CSS TRENCH FLOW PATH 50 0

50 100 150 25 Feet 1,557.1' 0

200 400 100 Feet Figure No.:

Job No.:

Dwg. Date:

Proj. Mgr.: MJB Designed By: MJB Reviewed By: MJB Operator: GAS 01.0017869.92 5A INDIAN POINT ENERGY CENTER BUCHANAN, NEW YORK GZA GeoEnvironmental, Inc.

One Edgewater Drive Norwood, MA 02062 Phone: (781) 278-3700 Fax: (781) 278-5701 2nd QUARTER 2011 LONGTERM TRANSDUCER MONITORING EVALUATION MAP LAFARGE WELLS Transducer Notes:

Potential Future Source Locations Unit 2 and Unit 3 Potential H3 Source

• - For locations with multilevel depth monitoring, redundancy provided by monitoring more than one depth at same location.

- Redundant transducer data not available for Q2 2011.

Probable Legacy Release SSCs Containment Spray Sump Pipe Trench Terminated Connection To Storm Drain Drain Exfiltration Inter-Structure Joint / Mud Mat Unit 1 West Fuel Pool (All U1-SFPs drained and inactive as of October 2008)

Unit 2 Fuel Pool (All identified leaks repaired as of December 2007)

LEGEND Monitoring Installations MW-30 Boring / Monitoring Installation Designation Longterm Radionuclide Monitoring Installation

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Standby Radionuclide Monitoring Installation

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Transducer Monitored Interval Interval no longer monitored with Transducer 32.5 36.8 Quarterly groundwater elevation at time of low river tide on 5-25-2011 33.3 32.4 Single level monitoring location with duplicate Transducers for redundancy*

35.6 33.1 34.7 39.2 38.1 35.2 Multiple Screened Intervals w/ Depth Maximum quarterly groundwater elevation at time of low river tide measured between Q2 2007 and Q2 2009, inclusive.

Minimum quarterly groundwater elevation at time of low river tide measured between Q2 2007 and Q2 2009, inclusive.

Activity Data Isopleth Bounding Activity H3 Bounding Activity SR90

> 5,000 pCi/L

> 2 pCi/L 1,

1, 2

3 (Data from primary trans. shown) 5 Transient Distillate Tank Valve Leak in Unit 1 Fuel Storage Building - 3/07/2009 Unit 3 SFP Evap. Washout to MH-A2 - 3/25/09 6

G Transient Spill from Temporary R.O. Skid Piping -

Entered MW-32 Vault and MH 11/21/2009 7

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Data Notes:

1. Illustration of contaminant plume is a schematic representation only. In reality, the geologic bedrock formation is over 99% solid, crystalline rock, with the contaminated water contained only in the remaining (less than 1%) interstitial space (i.e. fractures).

2. The H3 bounding isopleth encompasses upper bound values measured over both depth and time through the current quarter. As such, the "plume" is an overstatement of contaminant levels actually existing on-site at any time. Compare bounding plume to current plume on Figure 6.

3. The Sr-90 bounding isopleth encompasses upper bound values measured over both depth and time through the current quarter. As such, the "plume" is an overstatement of contaminant levels actually existing on-site at any time. Compare bounding plume to current plume on Figure 7.

4. Two discrete isopleths have been drawn around MW-39 and 41 given measured Sr90 concentrations greater than 2 pCi/L. It is expected that similar concentrations exist at other locations along the legacy piping alignment in addition to the locations shown.

5. Historically elevated Tritium levels in MW-42-49 observed during Q1 2009 were consistent with leakage visually identified on 03/07/2009 (and terminated immediately thereafter) from the waste distillate tank valves located within the Unit 1 fuel storage building. Data trends through Q1 2010 indicate that the observed Tritium peaks in MW-42-49 and downgrading wells associated with this release have dissipated through the groundwater flow system.

6. Historically elevated Tritium levels in MW-45-42 observed during Q2 2009 were consistent with an increased activity observed in Unit 3 Manhole A2. This release was initially detected in a storm drain sample collected 03/25/2009 under the 80-10 Effluents Program. This Tritium peak dissipated prior to samples taken during the subsequent quarter. Additionally, transient Tritium peaks have been recently detected in MH-A2 from Q3 2010 to Q2 2011. These increases are consistent with elevated Tritium levels in MW-41-40, MW-46 and B-1. Based on investigations initiated in, and ongoing since, 2009 and the more recent sampling of the Unit 3 Fuel Storage Building (FSB) roof drains, it has been concluded that these increases in storm drain and monitoring well Tritium activity are due to condensation of SFP evaporation on the FSB roof (Washout) when the exhaust fan is not operating, which then enters the roof drains and discharges directly into MH-A2 during rainfall events.

7. Elevated levels of Tritium detected in MH-9 and MH-10a during routine 80-10 Effluents Program sampling on 1/15/2010 appears to have originated from a November 21, 2009 transient leak in temporary RWST / R.O. skid connection hoses, which flowed into MH-9. It also appears that this release entered the well vault for MW-32, and may have penetrated the well casings and entered the subsurface around the monitoring installation.

8.Elevated levels of Tritium initially detected in U1-CSS, MW-39, MW-46, MW-54, MW-56 and MW-57 during the Q2-2011 sampling event appear to have originated from a Q2 2011 sample sink overflow and subsequent floor flooding in a Unit 1 Chemical Systems Building sample room on the 53 elevation.

General Notes

1. Base map was developed from an untitled electronic file provided by Badey and Watson Surveying and Engineering, P.C., Dated 2/3/06; CAD file name : "GZA.dwg".

09-17-2012

© 2012 - GZA GeoEnvironmental, Inc. \\\\gzanor\\Jobs\\17,000-18,999\\17869\\17869-91.MG\\Figures\\GIS\\MXD Documents\\2011-comb\\12-09-17 F05A Q2 2011 Longterm Transducer Monitoring Evaluation Map 17869-92_final.mxd, 9/17/2012, 1:19:32 PM, jennifer.pisani (Surface Spills and Washout)

(initial)

Localized Transient Releases Sample Sink Overflow - Unit 1 Chemical Systems Building Q2 2011 8XXXX Low River Tide Elevation Q2-11 (Feet msl)

(Quarter)

(Feet msl)

(Quarter)

(Feet msl)

HR1

-3.28 Q1-09

-0.86 Q3-07

-1.14 I2 48.62 Q3-07 53.73 Q1-08 53.62 MW-30-69 11.53 Q3-07 12.33 Q1-09 12.18 MW-30-84 12.36 Q4-08 13.13 Q1-09 NA MW-40-27 54.22 Q4-08 60.39 Q1-08 58.88 MW-40-162 36.67 Q3-07 50.49 Q1-08 50.64 MW-43-28 31.08 Q3-07 33.95 Q2-08 NA MW-43-62 30.48 Q3-08 34.13 Q1-09 31.61 MW-46 11.95 Q3-07 15.05 Q1-08 13.21 MW-51-40 45.15 Q2-09 52.35 Q2-08 NA MW-51-189 29.33 Q3-07 31.79 Q2-08 31.16 MW-53-82 9.59 Q3-07 12.60 Q2-08 12.07 MW-53-120 9.18 Q3-07 11.49 Q2-08 11.55 MW-55-24 7.82 Q3-07 9.02 Q4-08 9.15 MW-55-54 7.65 Q3-07 8.82 Q4-08 9.26 MW-65-48 36.98 Q2-09 48.19 Q1-09 NA MW-65-80 32.72 Q4-08 34.97 Q2-08 NA MW-66-21

-0.74 Q1-08 0.50 Q2-09 1.65 MW-66-36

-0.86 Q1-09 0.81 Q2-07 2.28 MW-67-39

-0.56 Q2-09 1.02 Q3-07 NA MW-67-340

-2.42 Q1-09 0.63 Q3-07 NA U3-C1 0.64 Q1-09 3.58 Q4-07 3.20 Notes:

1. Quarter 2, 2007 groundwater elevations were measured on 6/1/07 at 6:20 am.

9.26

2. Quarter 3, 2007 groundwater elevations were measured on 9/25/07 at 4:32 am.

between Q2-2007 and Q2-2009, inclusive.

3. Quarter 4, 2007 groundwater elevations were measured on 12/9/07 at 4:15 am.

4. Quarter 1, 2008 groundwater elevations were measured on 1/3/08 at 1:14 a.m.

5. Quarter 2, 2008 groundwater elevations were measured on 4/4/08 at 5:14 pm.

6. Quarter 3, 2008 groundwater elevations were measured on 7/10/08 at 11:35 am.

7. Quarter 4, 2008 groundwater elevations were measured on 11/11/08 at 2:54 am.

8. Quarter 1, 2009 groundwater elevations were measured on 1/9/09 at 2:42.

9. Quarter 2, 2009 groundwater elevations were measured on 5/22/09 at 2:41 pm.

10. Quarter 3, 2009 groundwater elevations were measured on 8/9/09 at 8:18 am.

11. Quarter 4, 2009 groundwater elevations were measured on 11/28/09 at 3:45 pm.

12. Quarter 1, 2010 groundwater elevations were measured on 1/30/10 at 6:00 am.

13. Quarter 2, 2010 groundwater elevations were measured on 4/09/10 at 12:06 pm.

14. Quarter 3, 2010 groundwater elevations were measured on 7/31/10 at 12:30 am.

15. Quarter 4, 2010 groundwater elevations were measured on 10/16/10 at 1:36 am.

16. Quarter 1, 2011 groundwater elevations were measured on 1/22/11 at 8:20 pm.

17. Quarter 2, 2011 groundwater elevations were measured on 5/25/11 at 5:13 pm.

NA - data not available.

Highlighted box indicates that data falls >30% outside of range Maximum Low River Tide Elevation Q2-2007 through Q2-2009 Q2-2007 through Q2-2009 Well ID Minimum Low River Tide Elevation ENT00575B Submitted: October 2, 2012

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I-2 U3-3 U3-2 U3-1 RW-1 MW-67 MW-66 MW-37 MW-36 MW-35 MW-34 MW-33 U3-4S U3-4D MW-52 MW-51 MW-50 MW-49 MW-47 MW-46 MW-45 MW-44 MW-42 MW-41 MW-38 MW-32 MW-31 MW-40 MW-48 MW-43 MW-39 U3-T2 U3-T1 MW-65 MW-62 MW-60 MW-59 MW-57 MW-56 MW-55 MW-54 MW-53 MW-30 MW-64 MW-61 MW-63 U1-CSS MW-105 MW-101 MW-110 MW-111 MW-112 MW-108 MW-107 MW-58 MW-109 Storage storage Gravel Gravel Storage No Access Grass Earth Parking Asphalt Asphalt curb Asphalt parking Asphalt Concrete curbs Sign Concrete curb Concrete Concrete sidewalk Concrete curb Wooden curb Concrete sidewalk Concrete sidewalk Grass Concrete sidewalk Concrete sidewalk A/C UNIT Handicap ramp Concrete sidewalk Concrete sidewalk A/C unit on concrete Concrete sidewalk Conc. sidewalk Concrete sidewalk Stone curbs Asphalt drive Asphalt parking Asphalt parking Asphalt parking Asphalt parking Asphalt curb Asphalt sidewalk Shrubs Trans.

Asphalt Concrete sidewalk Concrete sidewalk Transformer area and switch gear Storage Containers A/C Units Grass Concrete curb Grass Shrubs Concrete sidewalk Conc. sidewalk Wooden walk Open gr ate Asphalt drive Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt drive Asphalt Asphalt Drive Sidewalk Gravel Gravel Transformer yard Asphalt Drive this Area No Access Asphalt Conc rete Retaining Wa ll Stone retaining wall Concrete sidewalk Gravel parking Concrete sidewalk Gravel parking Gravel parking Gravel parking curbs Stone curbs Stone curbs Asphalt parking Concrete curb Asphalt parking Concrete curb Concrete sidewalk curb pad Asphalt curb Asphalt curb Asphalt parking Grass Asphalt curb Asphalt curb Grass Asphalt curb Asphalt parking sidewalk Concrete Gravel parking Storage Grass Asphalt drive Storage units Gravel Parking lot Asphalt Concrete sidewalk Overhead walkway Concrete curb Asphalt parking Concrete walk Asphalt parking Asphalt Asphalt Asphalt Wood walk Asphalt Concrete walk Concrete pier Courtyard Asphalt Rip-rap Sidewalk Concrete 110 140 120 130 30 30 40 50 30 40 50 90 70 70 80 90 80 80 90 100 110 110 110 110 120 120 100 70 60 70 80 90 60 80 90 100 100 0

110 140 140 Transformer Gravel Covered Concrete Asphalt parking Transformers on raised Concrete Pad Trans.

Transformers Concrete slab Grass Transformers on raised Concrete Pad Concrete Bridge Concrete Bridge Transformer Substation "H" Trailer Trans Asphalt Trans Trans Trans Concrete sidewalk Asphalt Grass Vent pit Mach.

stand Transformers Yard (Gravel)

DISCHARGE OUTFALL CANAL Gravel Shrubs Shrubs Shrubs Overhead Crane Grass FUEL TRAN SFE R PO O L STO RA GE PO O L STO RA GE PO O L FA IL ED FU EL AUX. PO O L DIS ASS EM B LY PO O L CAS K L O AD PO O L CAS K W AS H &

DIS ASS EM B LY ISO L ATIO N PI T PU MP SU CTI ON WELL WATER STO RA GE PO O L ROOF DRAIN ELEVATION 65' 43.8' 43.8' 43.8' 21.75' 22.75' (EL.=0.0) 33' 13' 43.8' 33' 33' 33' 33' 33' 42.5' 42.5' MH-4 MH-4A MH-5 MH-6 MH-2 B6 B6A B5 B4 B4A B3 B3A B2A B2 B1 A2 A1 U3-MH-14 F5 A2A CB-B CB-E CB-F C-1 C-3 D2 B7 B8 CB-33 CB-34 CB-15 CB-14 CB-13 CB-32 CB-31 CB-30 A7 U1-CB-22 U3-CB (U1-CB-10)

CB-29 U3-CB (U1-CB-9)

U1-CB-21 U1-CB-20 CB-28 CB-24 CB-27 E16 E16 E16A CB-6 CB-5A (CB-6)

CB-5B CB-7 CB-5 MH16 CB-3B CB3A CB4 CB-2C CB3 CB-2B CB-2A CB-2 CB-1 MH18 MH8 MH17 MH7 MH23A CB-16 MH9 MH10 MH11 MH22 MH21 MH13 MH3 MH12 MH1 CB-18 MH15 CB-19 CB-23 MH14 C2 E7 E6 E8 E9 E10 E11 E5 E5A E4 E4 E4A E3B E3 E3A F3 F4 CB E2 E2A F6 F7 E2B E2C E1 A6 A5 A3A A3 A4 E14 E15 E15A (U1-CB-8)

AB E13 E12 D1 CB-17 F2 F1 CB-12 MH-23 MH-19 MH-20 ROOF DRAIN Turbine Generator Building 2 Turbine Generator Building 1 Turbine Generator Building 3 Transformer Yard PAB FUEL POOL UNIT 2 1,015' 640' WEST FUEL POOL UNIT 1 UNIT 3 U2-C1 HR-1 U3-C1 OUT-1 4

4 33' UTILITY TUNNEL 33' UTILITY TUNNEL CSS CSS TRENCH 5

6 7

MH-5 U1-NCD U1-SFDS B-1 B-6 8

8.05 9.92 0.41 0.67 5.25 5.96 7.08 8.63 9.20 0.81 0.50 4.51 4.33 3.58 9.25 5.34 4.20 4.25 4.31 3.01 1.31 0.64 5.08 5.17 8.85 5.69 6.86 6.41 8.12 8.22 8.82 9.49 9.02 3.71 7.24 7.36 8.32 7.20 5.55 6.83 5.64 1.04 1.02 1.01 0.88 0.70 1.41 0.03 0.55 0.86 0.51 0.32 7.93 9.23 1.06 1.40 1.07 0.89 0.95 0.61 0.25 0.18 1.61 0.74 0.75 1.39 1.02 0.63 0.94 3.07 0.08 0.74 48.81 15.05 43.19 36.63 34.96 45.52 47.50 10.20 25.01 13.30 47.99 53.73 10.07 10.12

-0.08 31.79 36.77 40.71 39.02 44.17 52.35 50.49 53.61 54.10 56.06 59.35 60.39 34.97 48.19 28.89 29.83 30.67 31.34 31.94 32.20 33.31 36.57 34.13 33.95 37.16 32.91 37.99 29.93 28.35 31.53 30.88 30.15 11.24 11.66 12.03 12.06 11.49 13.13 12.33 10.71 12.07 11.11

-0.86

-0.33

-0.48

-0.63 121.79 6.26 8.81 8.18 4.11 4.89 5.95 5.78 5.61 3.67 3.76 8.61 0.64 6.52 5.34 4.20 2.69 3.74 4.95 1.22 0.76 9.47 9.80 6.71 9.67 8.98 9.59 9.18 2.00 2.19 5.89 2.99 5.17 5.75 6.29 8.22 6.85 7.65 7.29 7.82 9.08 9.38 8.83 1.95 5.24 6.03 6.49 6.07 4.18 5.40 4.05 0.42 0.31 0.82 42.12 11.95 39.59 35.07 34.43 41.21 44.09 11.06 10.27 41.44 48.62

-2.38

-2.07

-0.86

-0.74

-0.50

-1.14 29.33 33.79 37.42 36.03 39.92 45.15 36.67 38.89 39.47 41.65 47.27 54.22 32.72 36.98 22.70 22.33 24.43 24.79 25.12 25.21 25.94 29.87 30.48 31.08 24.82 23.25 33.36 20.16 21.08 20.77 23.10 29.05 12.36 11.53

-0.62

-0.44

-0.08

-1.97

-2.46

-1.49

-3.14

-1.68

-2.08

-0.74

-0.64

-5.66

-3.28

-2.66

-1.33

-1.68

-2.15

-2.03

-1.13

-0.82

-2.86

-1.03

-1.87

-1.62

-0.67

-0.56

-2.42

-1.72

-3.41

-2.99

-1.43

-2.70 113.87

NA NA NA NA NA 1.18 0.45 9.15 9.36 14.56 54.07 31.45 50.68 51.14 32.84 13.16

-0.89

-1.58

-2.99 H U D S O N R I V E R 8.05 9.92 0.41 0.67 5.25 5.96 7.08 8.63 9.20 0.81 0.50 4.51 4.33 3.58 9.25 5.34 4.20 4.25 4.31 3.01 1.31 0.64 5.08 5.17 8.85 5.69 6.86 6.41 8.12 8.22 9.05 8.82 9.49 9.02 3.71 7.24 7.36 8.32 7.20 5.55 6.83 5.64 1.04 1.02 1.01 0.88 0.70 1.41 0.03 0.55 0.86 0.51 0.32 7.93 9.23 1.06 1.40 1.07 0.89 0.95 0.61 0.25 0.18 1.61 0.74 0.75 1.39 1.02 0.63 0.94 3.07 0.08 0.74 15.05 43.19 36.63 34.96 45.52 47.50 10.20 25.01 13.30 47.99 53.73 10.07 10.12

-0.08 31.79 36.77 40.71 39.02 44.17 52.35 50.49 53.61 54.10 56.06 59.35 60.39 34.97 48.19 28.89 29.83 30.67 31.34 31.94 32.20 33.31 36.57 34.13 33.95 37.16 32.91 37.99 29.16 29.93 28.35 31.53 30.88 30.15 11.24 11.66 12.03 12.06 20.46 12.60 11.49 13.13 12.33 10.71 12.07 11.11

-0.86

-0.33

-0.48

-0.63 121.79 NA 13.49 12.07 Plant North N

N 3rd QUARTER 2011 LONGTERM TRANSDUCER MONITORING EVALUATION MAP

?

?

? LAF-03 LAF-02 LAF-01 H U D S O N R I V E R EASTERN IP1-CB FLOW PATH SOUTH WESTERN IP1-CB FLOW PATH PRIMAR Y

IP1 FL OW P ATH LEGACY IP1 STORM DRAIN FLOW PATH IP1-CSS TRENCH FLOW PATH 50 0

50 100 150 25 Feet 1,557.1' 0

200 400 100 Feet Figure No.:

Job No.:

Dwg. Date:

Proj. Mgr.: MJB Designed By: MJB Reviewed By: MJB Operator: GAS 01.0017869.92 5A INDIAN POINT ENERGY CENTER BUCHANAN, NEW YORK GZA GeoEnvironmental, Inc.

One Edgewater Drive Norwood, MA 02062 Phone: (781) 278-3700 Fax: (781) 278-5701 3rd QUARTER 2011 LONGTERM TRANSDUCER MONITORING EVALUATION MAP LAFARGE WELLS Transducer Notes:

Potential Future Source Locations Unit 2 and Unit 3 Potential H3 Source

• - For locations with multilevel depth monitoring, redundancy provided by monitoring more than one depth at same location.

- Redundant transducer data not available for Q3 2011.

Probable Legacy Release SSCs Containment Spray Sump Pipe Trench Terminated Connection To Storm Drain Drain Exfiltration Inter-Structure Joint / Mud Mat Unit 1 West Fuel Pool (All U1-SFPs drained and inactive as of October 2008)

Unit 2 Fuel Pool (All identified leaks repaired as of December 2007)

LEGEND Monitoring Installations MW-30 Boring / Monitoring Installation Designation Longterm Radionuclide Monitoring Installation

?

Standby Radionuclide Monitoring Installation

?

Transducer Monitored Interval Interval no longer monitored with Transducer 32.5 36.8 Quarterly groundwater elevation at time of low river tide on 8-22-2011 33.3 32.4 Single level monitoring location with duplicate Transducers for redundancy*

35.6 33.1 34.7 39.2 38.1 35.2 Multiple Screened Intervals w/ Depth Maximum quarterly groundwater elevation at time of low river tide measured between Q2 2007 and Q2 2009, inclusive.

Minimum quarterly groundwater elevation at time of low river tide measured between Q2 2007 and Q2 2009, inclusive.

Activity Data Isopleth Bounding Activity H3 Bounding Activity SR90

> 5,000 pCi/L

> 2 pCi/L 1,

1, 2

3 (Data from primary trans. shown) 5 Transient Distillate Tank Valve Leak in Unit 1 Fuel Storage Building - 3/07/2009 Unit 3 SFP Evap. Washout to MH-A2 - 3/25/09 6

G Transient Spill from Temporary R.O. Skid Piping -

Entered MW-32 Vault and MH 11/21/2009 7

^

Data Notes:

1. Illustration of contaminant plume is a schematic representation only. In reality, the geologic bedrock formation is over 99% solid, crystalline rock, with the contaminated water contained only in the remaining (less than 1%) interstitial space (i.e. fractures).

2. The H3 bounding isopleth encompasses upper bound values measured over both depth and time through the current quarter. As such, the "plume" is an overstatement of contaminant levels actually existing on-site at any time. Compare bounding plume to current plume on Figure 6.

3. The Sr-90 bounding isopleth encompasses upper bound values measured over both depth and time through the current quarter. As such, the "plume" is an overstatement of contaminant levels actually existing on-site at any time. Compare bounding plume to current plume on Figure 7.

4. Two discrete isopleths have been drawn around MW-39 and 41 given measured Sr90 concentrations greater than 2 pCi/L. It is expected that similar concentrations exist at other locations along the legacy piping alignment in addition to the locations shown.

5. Historically elevated Tritium levels in MW-42-49 observed during Q1 2009 were consistent with leakage visually identified on 03/07/2009 (and terminated immediately thereafter) from the waste distillate tank valves located within the Unit 1 fuel storage building. Data trends through Q1 2010 indicate that the observed Tritium peaks in MW-42-49 and downgrading wells associated with this release have dissipated through the groundwater flow system.

6. Historically elevated Tritium levels in MW-45-42 observed during Q2 2009 were consistent with an increased activity observed in Unit 3 Manhole A2. This release was initially detected in a storm drain sample collected 03/25/2009 under the 80-10 Effluents Program. This Tritium peak dissipated prior to samples taken during the subsequent quarter. Additionally, transient Tritium peaks have been recently detected in MH-A2 from Q3 2010 to Q2 2011. These increases are consistent with elevated Tritium levels in MW-41-40, MW-46 and B-1. Based on investigations initiated in, and ongoing since, 2009 and the more recent sampling of the Unit 3 Fuel Storage Building (FSB) roof drains, it has been concluded that these increases in storm drain and monitoring well Tritium activity are due to condensation of SFP evaporation on the FSB roof (Washout) when the exhaust fan is not operating, which then enters the roof drains and discharges directly into MH-A2 during rainfall events.

7. Elevated levels of Tritium detected in MH-9 and MH-10a during routine 80-10 Effluents Program sampling on 1/15/2010 appears to have originated from a November 21, 2009 transient leak in temporary RWST / R.O. skid connection hoses, which flowed into MH-9. It also appears that this release entered the well vault for MW-32, and may have penetrated the well casings and entered the subsurface around the monitoring installation.

8.Elevated levels of Tritium initially detected in U1-CSS, MW-39, MW-46, MW-54, MW-56 and MW-57 during the Q2-2011 sampling event appear to have originated from a Q2 2011 sample sink overflow and subsequent floor flooding in a Unit 1 Chemical Systems Building sample room on the 53 elevation.

General Notes

1. Base map was developed from an untitled electronic file provided by Badey and Watson Surveying and Engineering, P.C., Dated 2/3/06; CAD file name : "GZA.dwg".

09-17-2012

© 2012 - GZA GeoEnvironmental, Inc. \\\\gzanor\\Jobs\\17,000-18,999\\17869\\17869-91.MG\\Figures\\GIS\\MXD Documents\\2011-comb\\12-09-17 F05A Q3 2011 Longterm Transducer Monitoring Evaluation Map 17869-92_final.mxd, 9/17/2012, 1:31:15 PM, jennifer.pisani (Surface Spills and Washout)

(initial)

Localized Transient Releases Sample Sink Overflow - Unit 1 Chemical Systems Building Q2 2011 8XXXX Low River Tide Elevation Q3-11 (Feet msl)

(Quarter)

(Feet msl)

(Quarter)

(Feet msl)

HR1

-3.28 Q1-09

-0.86 Q3-07

-0.89 I2 48.62 Q3-07 53.73 Q1-08 54.07 MW-30-69 11.53 Q3-07 12.33 Q1-09 13.16 MW-30-84 12.36 Q4-08 13.13 Q1-09 NA MW-40-27 54.22 Q4-08 60.39 Q1-08 51.14 MW-40-162 36.67 Q3-07 50.49 Q1-08 50.68 MW-43-28 31.08 Q3-07 33.95 Q2-08 NA MW-43-62 30.48 Q3-08 34.13 Q1-09 32.84 MW-46 11.95 Q3-07 15.05 Q1-08 14.56 MW-51-40 45.15 Q2-09 52.35 Q2-08 NA MW-51-189 29.33 Q3-07 31.79 Q2-08 31.45 MW-53-82 9.59 Q3-07 12.60 Q2-08 13.49 MW-53-120 9.18 Q3-07 11.49 Q2-08 12.07 MW-55-24 7.82 Q3-07 9.02 Q4-08 9.36 MW-55-54 7.65 Q3-07 8.82 Q4-08 9.15 MW-65-48 36.98 Q2-09 48.19 Q1-09 NA MW-65-80 32.72 Q4-08 34.97 Q2-08 NA MW-66-21

-0.74 Q1-08 0.50 Q2-09 0.45 MW-66-36

-0.86 Q1-09 0.81 Q2-07 1.18 MW-67-39

-0.56 Q2-09 1.02 Q3-07

-1.58 MW-67-340

-2.42 Q1-09 0.63 Q3-07

-2.99 U3-C1 0.64 Q1-09 3.58 Q4-07 NA Notes:

1. Quarter 2, 2007 groundwater elevations were measured on 6/1/07 at 6:20 am.

13.16

2. Quarter 3, 2007 groundwater elevations were measured on 9/25/07 at 4:32 am.

between Q2-2007 and Q2-2009, inclusive.

3. Quarter 4, 2007 groundwater elevations were measured on 12/9/07 at 4:15 am.

4. Quarter 1, 2008 groundwater elevations were measured on 1/3/08 at 1:14 a.m.

5. Quarter 2, 2008 groundwater elevations were measured on 4/4/08 at 5:14 pm.

6. Quarter 3, 2008 groundwater elevations were measured on 7/10/08 at 11:35 am.

7. Quarter 4, 2008 groundwater elevations were measured on 11/11/08 at 2:54 am.

8. Quarter 1, 2009 groundwater elevations were measured on 1/9/09 at 2:42.

9. Quarter 2, 2009 groundwater elevations were measured on 5/22/09 at 2:41 pm.

10. Quarter 3, 2009 groundwater elevations were measured on 8/9/09 at 8:18 am.

11. Quarter 4, 2009 groundwater elevations were measured on 11/28/09 at 3:45 pm.

12. Quarter 1, 2010 groundwater elevations were measured on 1/30/10 at 6:00 am.

13. Quarter 2, 2010 groundwater elevations were measured on 4/09/10 at 12:06 pm.

14. Quarter 3, 2010 groundwater elevations were measured on 7/31/10 at 12:30 am.

15. Quarter 4, 2010 groundwater elevations were measured on 10/16/10 at 1:36 am.

16. Quarter 1, 2011 groundwater elevations were measured on 1/22/11 at 8:20 pm.

17. Quarter 2, 2011 groundwater elevations were measured on 5/25/11 at 5:13 pm.

18. Quarter 3, 2011groundwater elevations were measured on 8/22/11 at 10:48 am.

NA - data not available.

Highlighted box indicates that data falls >30% outside of range Maximum Low River Tide Elevation Q2-2007 through Q2-2009 Q2-2007 through Q2-2009 Well ID Minimum Low River Tide Elevation

G XY XYXY XY XYXY XYXY XY XYXY XYXY XYXY XY XY XYXY XY XY XYXY XYXY XY XYXY XY XY XY XYXY XYXY XYXY XYXY XY XY XYXY XYXY XY XYXY XYXY XY XY XYXY XY XYXY XYXY XY XYXY XYXY XYXY XY XYXY XYXY XYXY XY XYXY XYXY XYXY XY XYXY XYXY XY XYXY XYXY XYXY XY XY XY XYXY XYXY XY XY XYXY XYXY XYXY XY XYXY XY XYXY XYXY XY XYXY XYXY XYXY XY XYXY XYXY XY XYXY XYXY XYXY XY XYXY XYXY XY XYXY XYXY XY XY XYXY XYXY XYXY XY XY X

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I-2 U3-3 U3-2 U3-1 RW-1 MW-67 MW-66 MW-37 MW-36 MW-35 MW-34 MW-33 U3-4S U3-4D MW-52 MW-51 MW-50 MW-49 MW-47 MW-46 MW-45 MW-44 MW-42 MW-41 MW-38 MW-32 MW-31 MW-40 MW-48 MW-43 MW-39 U3-T2 U3-T1 MW-65 MW-62 MW-60 MW-59 MW-57 MW-56 MW-55 MW-54 MW-53 MW-30 MW-64 MW-61 MW-63 U1-CSS MW-105 MW-101 MW-110 MW-111 MW-112 MW-108 MW-107 MW-58 MW-109 Storage storage Gravel Gravel Storage No Access Grass Earth Parking Asphalt Asphalt curb Asphalt parking Asphalt Concrete curbs Sign Concrete curb Concrete Concrete sidewalk Concrete curb Wooden curb Concrete sidewalk Concrete sidewalk Grass Concrete sidewalk Concrete sidewalk A/C UNIT Handicap ramp Concrete sidewalk Concrete sidewalk A/C unit on concrete Concrete sidewalk Conc. sidewalk Concrete sidewalk Stone curbs Asphalt drive Asphalt parking Asphalt parking Asphalt parking Asphalt parking Asphalt curb Asphalt sidewalk Shrubs Trans.

Asphalt Concrete sidewalk Concrete sidewalk Transformer area and switch gear Storage Containers A/C Units Grass Concrete curb Grass Shrubs Concrete sidewalk Conc. sidewalk Wooden walk Open gr ate Asphalt drive Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt drive Asphalt Asphalt Drive Sidewalk Gravel Gravel Transformer yard Asphalt Drive this Area No Access Asphalt Conc rete Retaining Wa ll Stone retaining wall Concrete sidewalk Gravel parking Concrete sidewalk Gravel parking Gravel parking Gravel parking curbs Stone curbs Stone curbs Asphalt parking Concrete curb Asphalt parking Concrete curb Concrete sidewalk curb pad Asphalt curb Asphalt curb Asphalt parking Grass Asphalt curb Asphalt curb Grass Asphalt curb Asphalt parking sidewalk Concrete Gravel parking Storage Grass Asphalt drive Storage units Gravel Parking lot Asphalt Concrete sidewalk Overhead walkway Concrete curb Asphalt parking Concrete walk Asphalt parking Asphalt Asphalt Asphalt Wood walk Asphalt Concrete walk Concrete pier Courtyard Asphalt Rip-rap Sidewalk Concrete 110 140 120 130 30 30 40 50 30 40 50 90 70 70 80 90 80 80 90 100 110 110 110 110 120 120 100 70 60 70 80 90 60 80 90 100 100 0

110 140 140 Transformer Gravel Covered Concrete Asphalt parking Transformers on raised Concrete Pad Trans.

Transformers Concrete slab Grass Transformers on raised Concrete Pad Concrete Bridge Concrete Bridge Transformer Substation "H" Trailer Trans Asphalt Trans Trans Trans Concrete sidewalk Asphalt Grass Vent pit Mach.

stand Transformers Yard (Gravel)

DISCHARGE OUTFALL CANAL Gravel Shrubs Shrubs Shrubs Overhead Crane Grass FUEL TRAN SFE R PO O L STO RA GE PO O L STO RA GE PO O L FA IL ED FU EL AUX. PO O L DIS ASS EM B LY PO O L CAS K L O AD PO O L CAS K W AS H &

DIS ASS EM B LY ISO L ATIO N PI T PU MP SU CTI ON WELL WATER STO RA GE PO O L ROOF DRAIN ELEVATION 65' 43.8' 43.8' 43.8' 21.75' 22.75' (EL.=0.0) 33' 13' 43.8' 33' 33' 33' 33' 33' 42.5' 42.5' MH-4 MH-4A MH-5 MH-6 MH-2 B6 B6A B5 B4 B4A B3 B3A B2A B2 B1 A2 A1 U3-MH-14 F5 A2A CB-B CB-E CB-F C-1 C-3 D2 B7 B8 CB-33 CB-34 CB-15 CB-14 CB-13 CB-32 CB-31 CB-30 A7 U1-CB-22 U3-CB (U1-CB-10)

CB-29 U3-CB (U1-CB-9)

U1-CB-21 U1-CB-20 CB-28 CB-24 CB-27 E16 E16 E16A CB-6 CB-5A (CB-6)

CB-5B CB-7 CB-5 MH16 CB-3B CB3A CB4 CB-2C CB3 CB-2B CB-2A CB-2 CB-1 MH18 MH8 MH17 MH7 MH23A CB-16 MH9 MH10 MH11 MH22 MH21 MH13 MH3 MH12 MH1 CB-18 MH15 CB-19 CB-23 MH14 C2 E7 E6 E8 E9 E10 E11 E5 E5A E4 E4 E4A E3B E3 E3A F3 F4 CB E2 E2A F6 F7 E2B E2C E1 A6 A5 A3A A3 A4 E14 E15 E15A (U1-CB-8)

AB E13 E12 D1 CB-17 F2 F1 CB-12 MH-23 MH-19 MH-20 ROOF DRAIN Turbine Generator Building 2 Turbine Generator Building 1 Turbine Generator Building 3 Transformer Yard PAB FUEL POOL UNIT 2 1,015' 640' WEST FUEL POOL UNIT 1 UNIT 3 U2-C1 HR-1 U3-C1 OUT-1 4

4 33' UTILITY TUNNEL 33' UTILITY TUNNEL CSS CSS TRENCH 5

6 7

MH-5 U1-NCD U1-SFDS B-1 B-6 8

MW-68 8.05 9.92 0.41 0.67 5.25 5.96 7.08 8.63 9.20 0.81 0.50 4.51 4.33 3.58 9.25 5.34 4.20 4.25 4.31 3.01 1.31 0.64 5.08 5.17 8.85 5.69 6.86 6.41 8.12 8.22 8.82 9.49 9.02 3.71 7.24 7.36 8.32 7.20 5.55 6.83 5.64 1.04 1.02 1.01 0.88 0.70 1.41 0.03 0.55 0.86 0.51 0.32 7.93 9.23 1.06 1.40 1.07 0.89 0.95 0.61 0.25 0.18 1.61 0.74 0.75 1.39 1.02 0.63 0.94 3.07 0.08 0.74 48.81 15.05 43.19 36.63 34.96 45.52 47.50 10.20 25.01 13.30 47.99 53.73 10.07 10.12

-0.08 31.79 36.77 40.71 39.02 44.17 52.35 50.49 53.61 54.10 56.06 59.35 60.39 34.97 48.19 28.89 29.83 30.67 31.34 31.94 32.20 33.31 36.57 34.13 33.95 37.16 32.91 37.99 29.93 28.35 31.53 30.88 30.15 11.24 11.66 12.03 12.06 11.49 13.13 12.33 10.71 12.07 11.11

-0.86

-0.33

-0.48

-0.63 121.79 6.26 8.81 8.18 4.11 4.89 5.95 5.78 5.61 3.67 3.76 8.61 0.64 6.52 5.34 4.20 2.69 3.74 4.95 1.22 0.76 9.47 9.80 6.71 9.67 8.98 9.59 9.18 2.00 2.19 5.89 2.99 5.17 5.75 6.29 8.22 6.85 7.65 7.29 7.82 9.08 9.38 8.83 1.95 5.24 6.03 6.49 6.07 4.18 5.40 4.05 0.42 0.31 0.82 42.12 11.95 39.59 35.07 34.43 41.21 44.09 11.06 10.27 41.44 48.62

-2.38

-2.07

-0.86

-0.74

-0.50

-1.14 29.33 33.79 37.42 36.03 39.92 45.15 36.67 38.89 39.47 41.65 47.27 54.22 32.72 36.98 22.70 22.33 24.43 24.79 25.12 25.21 25.94 29.87 30.48 31.08 24.82 23.25 33.36 20.16 21.08 20.77 23.10 29.05 12.36 11.53

-0.62

-0.44

-0.08

-1.97

-2.46

-1.49

-3.14

-1.68

-2.08

-0.74

-0.64

-5.66

-3.28

-2.66

-1.33

-1.68

-2.15

-2.03

-1.13

-0.82

-2.86

-1.03

-1.87

-1.62

-0.67

-0.56

-2.42

-1.72

-3.41

-2.99

-1.43

-2.70 113.87

NA NA NA NA NA NA 0.5 9.7 0.41 8.98

-3.8 11.21 51.05 42.57 53.88 31.33 11.71

-1.51

-1.73 H U D S O N R I V E R 8.05 9.92 0.41 0.67 5.25 5.96 7.08 8.63 9.20 0.81 0.50 4.51 4.33 3.58 9.25 5.34 4.20 4.25 4.31 3.01 1.31 0.64 5.08 5.17 8.85 5.69 6.86 6.41 8.12 8.22 9.05 8.82 9.49 9.02 3.71 7.24 7.36 8.32 7.20 5.55 6.83 5.64 1.04 1.02 1.01 0.88 0.70 1.41 0.03 0.55 0.86 0.51 0.32 7.93 9.23 1.06 1.40 1.07 0.89 0.95 0.61 0.25 0.18 1.61 0.74 0.75 1.39 1.02 0.63 0.94 3.07 0.08 0.74 15.05 43.19 36.63 34.96 45.52 47.50 10.20 25.01 13.30 47.99 53.73 10.07 10.12

-0.08 31.79 36.77 40.71 39.02 44.17 52.35 50.49 53.61 54.10 56.06 59.35 60.39 34.97 48.19 28.89 29.83 30.67 31.34 31.94 32.20 33.31 36.57 34.13 33.95 37.16 32.91 37.99 29.16 29.93 28.35 31.53 30.88 30.15 11.24 11.66 12.03 12.06 20.46 12.60 11.49 13.13 12.33 10.71 12.07 11.11

-0.86

-0.33

-0.48

-0.63 121.79 NA 11.9 11.13 Plant North N

N 4th QUARTER 2011 LONGTERM TRANSDUCER MONITORING EVALUATION MAP

?

?

? LAF-03 LAF-02 LAF-01 H U D S O N R I V E R EASTERN IP1-CB FLOW PATH SOUTH WESTERN IP1-CB FLOW PATH PRIMAR Y

IP1 FL OW P ATH LEGACY IP1 STORM DRAIN FLOW PATH IP1-CSS TRENCH FLOW PATH 50 0

50 100 150 25 Feet 1,557.1' 0

200 400 100 Feet Figure No.:

Job No.:

Dwg. Date:

Proj. Mgr.: MJB Designed By: MJB Reviewed By: MJB Operator: GAS 01.0017869.92 5A INDIAN POINT ENERGY CENTER BUCHANAN, NEW YORK GZA GeoEnvironmental, Inc.

One Edgewater Drive Norwood, MA 02062 Phone: (781) 278-3700 Fax: (781) 278-5701 4th QUARTER 2011 LONGTERM TRANSDUCER MONITORING EVALUATION MAP LAFARGE WELLS Transducer Notes:

Potential Future Source Locations Unit 2 and Unit 3 Potential H3 Source

• - For locations with multilevel depth monitoring, redundancy provided by monitoring more than one depth at same location.

- Redundant transducer data not available for Q4 2011.

Probable Legacy Release SSCs Containment Spray Sump Pipe Trench Terminated Connection To Storm Drain Drain Exfiltration Inter-Structure Joint / Mud Mat Unit 1 West Fuel Pool (All U1-SFPs drained and inactive as of October 2008)

Unit 2 Fuel Pool (All identified leaks repaired as of December 2007)

LEGEND Monitoring Installations MW-30 Boring / Monitoring Installation Designation Longterm Radionuclide Monitoring Installation

?

Standby Radionuclide Monitoring Installation

?

Transducer Monitored Interval Interval no longer monitored with Transducer 32.5 36.8 Quarterly groundwater elevation at time of low river tide on 11-21-2011 33.3 32.4 Single level monitoring location with duplicate Transducers for redundancy*

35.6 33.1 34.7 39.2 38.1 35.2 Multiple Screened Intervals w/ Depth Maximum quarterly groundwater elevation at time of low river tide measured between Q2 2007 and Q2 2009, inclusive.

Minimum quarterly groundwater elevation at time of low river tide measured between Q2 2007 and Q2 2009, inclusive.

Activity Data Isopleth Bounding Activity H3 Bounding Activity SR90

> 5,000 pCi/L

> 2 pCi/L 1,

1, 2

3 (Data from primary trans. shown) 5 Transient Distillate Tank Valve Leak in Unit 1 Fuel Storage Building - 3/07/2009 Unit 3 SFP Evap. Washout to MH-A2 - 3/25/09 6

G Transient Spill from Temporary R.O. Skid Piping -

Entered MW-32 Vault and MH 11/21/2009 7

^

Data Notes:

1. Illustration of contaminant plume is a schematic representation only. In reality, the geologic bedrock formation is over 99% solid, crystalline rock, with the contaminated water contained only in the remaining (less than 1%) interstitial space (i.e. fractures).

2. The H3 bounding isopleth encompasses upper bound values measured over both depth and time through the current quarter. As such, the "plume" is an overstatement of contaminant levels actually existing on-site at any time. Compare bounding plume to current plume on Figure 6.

3. The Sr-90 bounding isopleth encompasses upper bound values measured over both depth and time through the current quarter. As such, the "plume" is an overstatement of contaminant levels actually existing on-site at any time. Compare bounding plume to current plume on Figure 7.

4. Two discrete isopleths have been drawn around MW-39 and 41 given measured Sr90 concentrations greater than 2 pCi/L. It is expected that similar concentrations exist at other locations along the legacy piping alignment in addition to the locations shown.

5. Historically elevated Tritium levels in MW-42-49 observed during Q1 2009 were consistent with leakage visually identified on 03/07/2009 (and terminated immediately thereafter) from the waste distillate tank valves located within the Unit 1 fuel storage building. Data trends through Q1 2010 indicate that the observed Tritium peaks in MW-42-49 and downgrading wells associated with this release have dissipated through the groundwater flow system.

6. Historically elevated Tritium levels in MW-45-42 observed during Q2 2009 were consistent with an increased activity observed in Unit 3 Manhole A2. This release was initially detected in a storm drain sample collected 03/25/2009 under the 80-10 Effluents Program. This Tritium peak dissipated prior to samples taken during the subsequent quarter. Additionally, transient Tritium peaks have been recently detected in MH-A2 from Q3 2010 to Q2 2011. These increases are consistent with elevated Tritium levels in MW-41-40, MW-46 and B-1. Based on investigations initiated in, and ongoing since, 2009 and the more recent sampling of the Unit 3 Fuel Storage Building (FSB) roof drains, it has been concluded that these increases in storm drain and monitoring well Tritium activity are due to condensation of SFP evaporation on the FSB roof (Washout) when the exhaust fan is not operating, which then enters the roof drains and discharges directly into MH-A2 during rainfall events.

7. Elevated levels of Tritium detected in MH-9 and MH-10a during routine 80-10 Effluents Program sampling on 1/15/2010 appears to have originated from a November 21, 2009 transient leak in temporary RWST / R.O. skid connection hoses, which flowed into MH-9. It also appears that this release entered the well vault for MW-32, and may have penetrated the well casings and entered the subsurface around the monitoring installation.

8.Elevated levels of Tritium initially detected in U1-CSS, MW-39, MW-46, MW-54, MW-56 and MW-57 during the Q2-2011 sampling event appear to have originated from a Q2 2011 sample sink overflow and subsequent floor flooding in a Unit 1 Chemical Systems Building sample room on the 53 elevation.

General Notes

1. Base map was developed from an untitled electronic file provided by Badey and Watson Surveying and Engineering, P.C., Dated 2/3/06; CAD file name : "GZA.dwg".

09-17-2012

© 2012 - GZA GeoEnvironmental, Inc. \\\\gzanor\\Jobs\\17,000-18,999\\17869\\17869-91.MG\\Figures\\GIS\\MXD Documents\\2011-comb\\12-09-17 F05A Q4 2011 Longterm Transducer Monitoring Evaluation Map 17869-92_final.mxd, 9/17/2012, 2:12:39 PM, jennifer.pisani (Surface Spills and Washout)

(initial)

Localized Transient Releases Sample Sink Overflow - Unit 1 Chemical Systems Building Q2 2011 8XXXX Low River Tide Elevation Q4-11 (Feet msl)

(Quarter)

(Feet msl)

(Quarter)

(Feet msl)

HR1

-3.28 Q1-09

-0.86 Q3-07

-1.51 I2 48.62 Q3-07 53.73 Q1-08 51.05 MW-30-69 11.53 Q3-07 12.33 Q1-09 11.71 MW-30-84 12.36 Q4-08 13.13 Q1-09 NA MW-40-27 54.22 Q4-08 60.39 Q1-08 53.88 MW-40-162 36.67 Q3-07 50.49 Q1-08 NA MW-43-28 31.08 Q3-07 33.95 Q2-08 NA MW-43-62 30.48 Q3-08 34.13 Q1-09 31.33 MW-46 11.95 Q3-07 15.05 Q1-08 11.21 MW-51-40 45.15 Q2-09 52.35 Q2-08 42.57 MW-51-189 29.33 Q3-07 31.79 Q2-08 NA MW-53-82 9.59 Q3-07 12.60 Q2-08 11.90 MW-53-120 9.18 Q3-07 11.49 Q2-08 11.13 MW-55-24 7.82 Q3-07 9.02 Q4-08 9.70 MW-55-54 7.65 Q3-07 8.82 Q4-08 8.98 MW-65-48 36.98 Q2-09 48.19 Q1-09 NA MW-65-80 32.72 Q4-08 34.97 Q2-08 NA MW-66-21

-0.74 Q1-08 0.50 Q2-09 0.50 MW-66-36

-0.86 Q1-09 0.81 Q2-07 0.41 MW-67-39

-0.56 Q2-09 1.02 Q3-07

-1.73 MW-67-340

-2.42 Q1-09 0.63 Q3-07

-3.80 U3-C1 0.64 Q1-09 3.58 Q4-07 NA Notes:

1. Quarter 2, 2007 groundwater elevations were measured on 6/1/07 at 6:20 am.

42.57

2. Quarter 3, 2007 groundwater elevations were measured on 9/25/07 at 4:32 am.

between Q2-2007 and Q2-2009, inclusive.

3. Quarter 4, 2007 groundwater elevations were measured on 12/9/07 at 4:15 am.

4. Quarter 1, 2008 groundwater elevations were measured on 1/3/08 at 1:14 a.m.

5. Quarter 2, 2008 groundwater elevations were measured on 4/4/08 at 5:14 pm.

6. Quarter 3, 2008 groundwater elevations were measured on 7/10/08 at 11:35 am.

7. Quarter 4, 2008 groundwater elevations were measured on 11/11/08 at 2:54 am.

8. Quarter 1, 2009 groundwater elevations were measured on 1/9/09 at 2:42.

9. Quarter 2, 2009 groundwater elevations were measured on 5/22/09 at 2:41 pm.

10. Quarter 3, 2009 groundwater elevations were measured on 8/9/09 at 8:18 am.

11. Quarter 4, 2009 groundwater elevations were measured on 11/28/09 at 3:45 pm.

12. Quarter 1, 2010 groundwater elevations were measured on 1/30/10 at 6:00 am.

13. Quarter 2, 2010 groundwater elevations were measured on 4/09/10 at 12:06 pm.

14. Quarter 3, 2010 groundwater elevations were measured on 7/31/10 at 12:30 am.

15. Quarter 4, 2010 groundwater elevations were measured on 10/16/10 at 1:36 am.

16. Quarter 1, 2011 groundwater elevations were measured on 1/22/11 at 8:20 pm.

17. Quarter 2, 2011 groundwater elevations were measured on 5/25/11 at 5:13 pm.

18. Quarter 3, 2011groundwater elevations were measured on 8/22/11 at 10:48 am.

19. Quarter 4, 2011 groundwater elevations were measured on 11/21/11 at 1:37 am.

NA - data not available.

Highlighted box indicates that data falls >30% outside of range Maximum Low River Tide Elevation Q2-2007 through Q2-2009 Q2-2007 through Q2-2009 Well ID Minimum Low River Tide Elevation

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ROOF DRAIN ELEVATION 65' 43.8' 43.8' 43.8' 21.75' 22.75' (EL.=0.0) 33' 13' 43.8' 33' 33' 33' 33' 33' 42.5' 42.5' storage Gravel Gravel Storage No Access Grass Earth Parking Asphalt Asphalt curb Asphalt parking Asphalt Concrete curbs Concrete curb Concrete Concrete curb Wooden curb Grass A/C UNIT Handicap ramp A/C unit on concrete Stone curbs Asphalt drive Asphalt parking Asphalt parking Asphalt parking Asphalt parking Asphalt curb Shrubs Trans.

Transformer area and switch gear Storage Containers A/C Units Grass Concrete curb Grass Shrubs Open gr ate Tank Asphalt drive Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt Asphalt drive Asphalt Asphalt Drive Gravel Gravel Transformer yard Asphalt Drive this Area No Access Asphalt Conc rete Retaining Wa ll Stone retaining wall Gravel parking Gravel parking Gravel parking Gravel parking Stone curbs Stone curbs Stone curbs Asphalt parking oncrete curb Asphalt parking Concrete curb curb pad Asphalt curb sphalt parking Asphalt curb Asphalt curb Grass Asphalt curb Gravel parking Storage Storage Tank Fuel Oil Grass Asphalt drive Storage units Gravel Parking lot Asphalt Tank Overhead walkway Concrete curb Asphalt parking Asphalt parking Asphalt Asphalt Asphalt Asphalt Concrete pier Courtyard Asphalt Rip-rap 110 140 120 130 30 30 40 50 30 40 50 90 70 70 80 90 80 80 90 100 110 110 110 110 120 120 100 70 60 70 80 90 60 80 90 100 100 100 110 140 140 Transformer Gravel Storage Tank Fuel Oil Tank Tank Tank Covered Concrete Asphalt parking Condensate Tank Transformers on raised Concrete Pad Trans.

Transformers Concrete slab Tank Grass Transformers on raised Concrete Pad Tank Concrete Bridge Concrete Bridge Storage Tank Transformer Substation "H" Trailer Trans Tank Storage Tank Tank Pit Asphalt Trans Trans Trans Storage Tanks Asphalt Grass Vent pit Mach.

stand Unit 2 Condensate Storage Tank Liquid Nitrogen Transformers Yard (Gravel)

DISCHARGE OUTFALL CANAL Tank Gravel Shrubs Shrubs Shrubs Overhead Crane Grass FUEL TRAN SFE R PO O L STO RA GE PO O L STO RA GE PO O L FA IL ED FU EL AUX. PO O L DIS ASS EM B LY PO O L CAS K L O AD PO O L CAS K W AS H &

DIS ASS EM B LY ISO L ATIO N PI T PU MP SU CTI ON WELL WATER STO RA GE PO O L MH-4 MH-4A MH-5 MH-6 MH-2 B6 B6A B5 B4 B4A B3 B3A B2A B2 B1 A2 A1 U3-MH-14 F5 A2A CB-B CB-E CB-F C-1 C-3 D2 B7 B8 CB-33 CB-34 CB-15 CB-14 CB-13 CB-32 CB-31 CB-30 A7 U1-CB-22 U3-CB (U1-CB-10)

CB-29 U3-CB (U1-CB-9)

U1-CB-21 U1-CB-20 CB-28 CB-24 CB-27 E16 E16 E16A CB-6 CB-5A (CB-6)

CB-5B CB-7 CB-5 MH16 CB-3B CB3A CB4 CB-2C CB3 CB-2B CB-2A CB-2 CB-1 MH18 MH8 MH17 MH7 MH23A CB-16 MH9 MH10 MH11 MH22 MH21 MH13 MH3 MH12 MH1 CB-18 MH15 CB-19 CB-23 MH14 C2 E7 E6 E8 E9 E10 E11 E5 E5A E4 E4 E4A E3B E3 E3A F3 F4 CB E2 E2A F6 F7 E2B E2C E1 A6 A5 A3A A3 A4 E14 E15 E15A (U1-CB-8)

AB E13 E12 D1 CB-17 F2 F1 CB-12 MH-23 MH-19 MH-20 ROOF DRAIN Transformer Yard PAB East Fuel Pool Water Storage Tank FUEL POOL UNIT 2 1,015' 640' WEST FUEL POOL UNIT 1 UNIT 3 ALL EY WAY UTILITY TUNNEL UTILITY TUNNEL CSS CSS TRENCH MW-30 50 40 30 20 10 5

50 40 30 20 10 5

20 13 B-1 B-6 U1-NCD U1-SFDS 3

3 3

3 MH-5 VCFD 4

5 4

1 1

1 1

1 1

1 1

1 1

1 1

1 1

3 6

I-2 HR-1 U3-3 U3-2 U3-1 RW-1 OUT-1 U3-C1 U2-C1 MW-67 MW-66 MW-37 MW-36 MW-35 MW-34 MW-33 U3-4S U3-4D MW-52 MW-51 MW-50 MW-49 MW-47 MW-46 MW-45 MW-44 MW-42 MW-41 MW-38 MW-32 MW-31 MW-40 MW-48 MW-43 MW-39 U3-T2 U3-T1 MW-65 MW-62 MW-60 MW-59 MW-58 MW-57 MW-56 MW-55 MW-54 MW-53 MW-64 MW-61 MW-63 U1-CSS MW-105 MW-101 MW-110 MW-111 MW-112 MW-109 MW-108 MW-107 H U D S O N R I V E R ND 39 ND ND ND ND ND ND ND ND ND ND ND ND 0.2 2.07 3.55 0.26 0.11 0.22 1.92 0.21 2.82 2.07 1.31 3.27 0.42 0.47 5.99 5.65 0.41 3.52 0.26 0.94 0.559 5.479 1.606 1.708 0.218 0.301 0.373 3.215 0.832 0.461 1.398 0.774 0.362 0.159 0.199 0.308 0.316 0.298 0.332 0.672 0.216 4.142 1.335 0.354 0.361 0.402 23.55 9.595 1.782 1.682 1.352 0.898 0.914 1.292 6.445 2.138 9.545 1.792 0.879 0.807 3.438 0.737 6.212 6.188 2.948 2.468 1.545 0.377 0.498 0.542 0.364 0.246 0.362 0.279 0.334 0.587 0.476 0.414 0.242 0.225 0.204 0.438 0.977 1.025 0.658 1.234 0.558 0.334 0.436 0.301 0.302 23.797 13.162 52.846 41.225 12.385 126.125 34 0.1 8.3 7.2 7.05 9.45 9.77

-1.3 4.55 5.16 6.14 6.02 8.44 0.29 3.69 3.76 9.02 0.81 8.94 2.69 3.81 7.88 1.22 33.9 22.7 21.9 10.6 3.13 3.29 6.97 4.06 5.76 6.41 7.45 9.05 8.82 9.02 9.92 2.34 7.06 6.46 7.19 5.55 6.04 5.64 0.49 0.68 0.47 2.52 0.47 0.16 2.04 45.79 12.81 39.64 35.07 34.43 41.21 44.13 11.53 12.16 44.48 50.75

-1.64

-0.15

-0.48 29.36 37.68 36.03 40.36 49.24 40.66 43.87 44.32 46.83 52.35 54.22 32.72 23.79 24.43 24.79 25.12 25.21 26.96 30.71 31.76 32.15 25.45 26.68 21.08 22.37 25.16 29.05 10.48 10.54 10.68 12.36 11.71 10.27

-1.19

-1.54

-0.86

-2.26

-0.98

-1.24

-0.13

-0.08

-1.79

-1.69

-1.85

-0.37

-0.85

-1.24

-0.84

-0.15

-0.12

-1.93

-0.14

-0.86

-0.82

-0.02

-1.56

-1.02

-2.59

-2.25

-0.91

-2.03 115.76 DRY ND 8.42 1.44 0.563 2.939 0.839 5.251 28.81 2.335 2.536 3.915 21.51 Plant North N

N 1st QUARTER 2011 ROLLING AVERAGE TRITIUM ACTIVITY MAP 1

50 0

50 100 150 25 Feet Figure No.:

Job No.:

Dwg. Date:

Proj. Mgr.: MJB Designed By: MJB Reviewed By: MJB Operator: GAS 01.0017869.92 6-Q1 INDIAN POINT ENERGY CENTER BUCHANAN, NEW YORK GZA GeoEnvironmental, Inc.

One Edgewater Drive Norwood, MA 02062 Phone: (781) 278-3700 Fax: (781) 278-5701 1st QUARTER 2011 ROLLING AVERAGE TRITIUM ACTIVITY MAP 1

LEGEND Activity Data1,2 Groundwater Elevation Contours Depth-Specific Data Containment Spray Sump Trench Probable Legacy Release SSCs Terminated Connection To Storm Drain Drain Exfiltration Inter-Structure Joint / Mud Mat H3 data x1,000 pCi/L No Depth-Specific Samples Bar Graphs; Average H3, pCi/L Not Detected (ND)

ND - 1,000 1,000 - 5,000 5,000 - 10,000 10,000 - 50,000 50,000 - 100,000

> 200,000 100,000 - 200,000 Isopleths; Average H3, pCi/L 5,000 - 10,000 10,000 - 50,000 50,000 - 100,000

> 100,000 ND 0.56 2.8 6.25 32.2 65 155 260 Note: Illustration of contaminant plume is a schematic representation only. In reality, the geologic bedrock formation is over 99% solid, crystalline rock, with the contaminated water contained only in the remaining (less than 1%) interstitial space (i.e. fractures).

MW-30 Boring / Monitoring Installation Designation Longterm Radionuclide Monitoring Installation

?

Standby Radionuclide Monitoring Installation

?

Unit 1 West Fuel Pool (All U1-SFPs drained and inactive as of October 2008)

Unit 2 Fuel Pool (All identified leaks repaired as of December 2007)

Transient Distillate Tank Valve Leak in Unit 1 Fuel Storage Building - 3/07/2009 Screened in Soil Screened in Bedrock Depth Multiple Screened Intervals 11.3 11.9 12.6 12.8 255.0 56.0 42.3 1.2 Average activity of H3 (pCi/L x1000) for each screened Interval.

Contours Other Than 10' Interval Ambient "Watertable" Contours for Q4 2008 (11/11/2008) 20 5

G 5

Footing Drain Active Storm Drain Catch Basin Abandoned Storm Drain Groundwater elevation for each screened interval at time of low river tide for Q4 2008 (11/11/2008).

1 1

1 1

Vadose Zone Contaminant Transport

^

4 Transient Spill from Temporary R.O. Skid Piping -

Entered MW-32 Vault and MH Q4 2009 6

Data Notes:

1. Average Tritium isopleths and activity values are yearly rolling arithmetic averages of the current and preceeding three quarters' data. Only values greater than the MDC are used in this average, thus adding a degree of conservatism to the subsequent dose computations.

2. Illustration of contaminant plume is a schematic representation only. In reality, the geologic bedrock formation is over 99% solid, crystalline rock, with the contaminated water contained only in the remaining (less than 1%) interstitial space (i.e. fractures).

3. Storm or foundation drain sampling locations, for which investigation levels are not applicable.

4. Historically elevated Tritium levels in MW-42-49 observed during Q1 2009 were consistent with leakage visually identified on 03/07/2009 (and terminated immediately thereafter) from the waste distillate tank valves located within the Unit 1 fuel storage building. Data trends through Q1 2010 indicate that the observed Tritium peaks in MW-42-49 and downgrading wells associated with this release have dissipated through the groundwater flow system.

5. Historically elevated Tritium levels in MW-45-42 observed during Q2 2009 were consistent with an increased activity observed in Unit 3 Manhole A2. This release was initially detected in a storm drain sample collected 03/25/2009 under the 80-10 Effluents Program. This Tritium peak dissipated prior to samples taken during the subsequent quarter. Additionally, transient Tritium peaks have been recently detected in MH-A2 from Q3 2010 to Q1 2011. These increases are consistent with elevated Tritium levels in MW-41-40, MW-46 and B-1. Based on investigations initiated in, and ongoing since, 2009 and the more recent sampling of the Unit 3 Fuel Storage Building (FSB) roof drains, it has been concluded that these increases in storm drain and monitoring well Tritium activity are due to condensation of SFP evaporation on the FSB roof (Washout) when the exhaust fan is not operating, which then enters the roof drains and discharges directly into MH-A2 during rainfall events.

6. Elevated levels of Tritium detected in MH-9 and MH-10a during routine 80-10 Effluents Program sampling on 1/15/2010 appears to have originated from a Q4 2009 transient leak in temporary RWST / R.O. skid connection hoses, which flowed into MH-9. It also appears that this release entered the well vault for MW-32, and may have penetrated the well casings and entered the subsurface around the monitoring installation.

Notes:

1. Groundwater contours drawn from Q4 2008 groundwater data to show groundwater conditions used for recalibration of the Precipitation Mass Balance Model (see Q2 2009 LTM Report). These contours developed from limited data recorded on 11/11/2008. Actual elevations may vary from conditions shown and the actual distribution of piezometric heads is likely more complex than indicated.

General Notes:

1. Base map was developed from an untitled electronic file provided by Badey and Watson Surveying and Engineering, P.C., Dated 2/3/06; CAD file name : "GZA.dwg".

© 2012 - GZA GeoEnvironmental, Inc. \\\\gzanor\\Jobs\\17,000-18,999\\17869\\17869-91.MG\\Figures\\GIS\\MXD Documents\\2011-comb\\12-08-30 F06 Q1 2011 Rolling Average Tritium Activity Map 17869-92_final.mxd, 9/13/2012, 3:36:18 PM, jennifer.pisani 09-13-2012 5.46E+04 Localized Transient Releases (Surface Spills and Washout)

Unit 3 SFP Evap. Washout to MH-A2 - 3/25/09(initial)

Well ID Quarter 2 Post Quarter 2 Quarter 3 Post Quarter 3 Quarter 4 Post Quarter 4 Quarter 1 Post Quarter 1 Quarter 2 Post Quarter 2

Quarter 3 Post Quarter 3 Quarter 4 Post Quarter 4 Quarter 1 Post Quarter 1 2010 2010 2010 2010 2010 2010 2011 2011 2010 2010 2010 2010 2.01E+03 2010 2011 2011 MW-30-69 1.61E+05 1.52E+05 1.28E+05 1.23E+05_1.11E+05 1.25E+05 NA 1.01E+05 1.08E+05 2.14E+05 1.26E+05 MW-53-82 4.71E+03 NA 2.25E+03 NA 2.59E+03 NA 5.95E+02 NA 3.83E+03 2.54E+03 MW-30-84 9.56E+03 9.40E+03 9.26E+03 1.00E+04_1.01E+04 1.02E+04 NA 9.20E+03 9.04E+03 1.22E+04 9.60E+03 MW-53-120 4.10E+03 NA 3.81E+03 NA 3.91E+03 NA 3.84E+03 NA 1.05E+04 3.92E+03 MW-31-49 1.16E+04 1.73E+04 5.46E+03 4.11E+03_ 1.04E+05 3.35E+04 NA 1.06E+03 4.31E+03 4.28E+04 2.88E+04 MW-54-37 1.18E+03 NA 1.21E+03 NA 1.45E+03 NA 1.33E+03 NA 2.71E+03 1.29E+03 MW-31-63 1.84E+04 5.11E+04 6.17E+04 6.69E+04_4.65E+04 2.95E+04 NA 2.46E+04 1.33E+04 3.99E+04 3.90E+04 MW-54-58 1.11E+03 NA 7.67E+02 NA 8.21E+02 NA 9.58E+02 NA 1.48E+03 9.14E+02 MW-31-85 4.85E+03 9.34E+03 6.70E+03 5.07E+03_6.21E+03 6.06E+03 NA 4.83E+03 7.75E+02 1.46E+04 5.48E+03 MW-54-123 9.16E+02 NA 7.83E+02 NA 8.12E+02 NA 1.08E+03 NA 1.30E+03 8.98E+02 MW-32-48 6.18E+04 NA 3.69E+03 5.90E+03 NA NA NA NA 5.83E+04**

2.38E+04 MW-54-144 1.28E+03 NA 1.44E+03 NA 1.34E+03 NA 1.35E+03 NA 2.64E+03 1.35E+03 MW-32-59 6.83E+04 1.55E+05 6.54E+04 5.78E+03_7.44E+04 1.58E+04 NA 4.39E+03 3.37E+04 3.42E+04 5.28E+04 MW-54-173 2.03E+03 NA 1.53E+03 NA 1.51E+03 NA 1.66E+03 NA 3.63E+03 1.68E+03 MW-32-85 1.15E+04 1.20E+04 1.21E+04 1.38E+04_1.44E+04 1.49E+04 NA 1.34E+04 1.32E+04 1.63E+04 1.32E+04 MW-54-190 1.71E+03 NA 1.60E+03 NA 1.93E+03 NA 1.89E+03 NA 3.49E+03 1.78E+03 MW-32-149 6.60E+03 9.76E+03 3.81E+03 2.60E+03_2.12E+03 1.55E+03 NA 1.06E+03 8.99E+02 1.00E+03 3.55E+03 MW-55-24 1.62E+03 NA 1.21E+03 NA 1.39E+03 NA 1.02E+03 NA 2.58E+03 1.31E+03 MW-32-173 1.54E+03 2.34E+03 2.47E+03 2.19E+03_1.98E+03 1.40E+03 NA 9.02E+02 8.41E+02 1.50E+03 1.71E+03 MW-55-35 2.01E+03 NA 1.89E+03 NA 1.57E+03 NA 1.70E+03 NA 4.38E+03 1.79E+03 MW-32-190 1.59E+03 1.76E+03 1.58E+03 1.69E+03_1.65E+03 1.53E+03 NA 1.64E+03 1.41E+03 4.21E+03 1.61E+03 MW-55-54 1.13E+04 NA 9.74E+03 NA 8.68E+03 NA 8.46E+03 NA 1.28E+04 9.55E+03 MW-33 6.31E+04 NA 3.69E+03 3.86E+03 NA NA NA NA 6.88E+04 2.36E+04 MW-56-53 2.58E+02 NA NA NA 4.64E+02 NA NA NA 1.19E+03 3.61E+02 MW-35 NA 2.82E+03 NA NA NA NA NA NA 2.92E+03 2.82E+03 MW-56-83 1.93E+03 NA NA NA 2.74E+03 NA NA NA 6.39E+03 2.34E+03 MW-36-24 3.53E+03 NA 2.64E+02 NA 2.62E+03 NA ND NA 2.56E+03 2.14E+03 MW-57-11 3.27E+03 NA NA NA NA NA NA NA 8.44E+03 3.27E+03 MW-36-41 1.56E+04 NA 1.30E+04 NA 1.22E+04 NA 8.74E+03 NA 2.10E+04 1.24E+04 MW-57-20 8.07E+02 NA NA NA NA NA NA NA 3.04E+03 8.07E+02 MW-36-52 8.49E+03 NA 7.07E+03 NA 7.08E+03 NA 3.14E+03 NA 1.48E+04 6.45E+03 MW-57-45 8.79E+02 NA NA NA NA NA NA NA 2.38E+03 8.79E+02 MW-37-22 9.06E+03 NA 3.70E+03 NA 4.46E+03 NA 6.74E+03 NA 9.19E+03 5.99E+03 MW-58-26 5.75E+02 NA NA NA 3.66E+02 NA NA NA 1.00E+03 4.70E+02 MW-37-32 7.24E+03 NA 4.80E+03 NA 5.99E+03 NA 4.57E+03 NA 9.32E+03 5.65E+03 MW-58-65 3.59E+02 NA NA NA 4.81E+02 NA NA NA 1.00E+03 4.20E+02 MW-37-40 5.37E+03 NA 7.00E+03 NA 6.41E+03 NA 5.97E+03 NA 9.02E+03 6.19E+03 MW-60-35 NA 2.85E+02 2.35E+02 NA ND NA NA NA 2.00E+03 2.60E+02 MW-37-57 5.20E+03 NA 7.30E+03 NA 6.72E+03 NA 5.63E+03 NA 9.62E+03 6.21E+03 MW-60-53 NA 3.45E+02 2.58E+02 NA ND NA NA NA 2.00E+03 3.02E+02 MW-39-67 3.79E+02 NA 2.86E+02 NA ND NA NA NA 1.00E+03 3.32E+02 MW-60-72 NA 3.01E+02 ND NA ND NA NA NA 2.00E+03 3.01E+02 MW-39-84 2.25E+02 NA 3.70E+02 NA ND NA NA NA 1.00E+03 2.98E+02 MW-60-135 NA 4.18E+02 1.87E+02 NA ND NA 3.98E+02 NA 2.00E+03 3.34E+02 MW-39-102 3.93E+02 NA 2.39E+02 NA ND NA NA NA 1.00E+03 3.16E+02 MW-60-154 NA 4.38E+02 2.93E+02 NA 4.68E+02 NA 5.44E+02 NA 2.00E+03 4.36E+02 MW-39-124 3.08E+02 NA ND NA ND NA NA NA 1.00E+03 3.08E+02 MW-60-176 NA 9.93E+02 8.13E+02 NA 8.33E+02 NA 1.12E+03 NA 2.00E+03 9.40E+02 MW-39-183 ND NA ND NA ND NA NA NA 1.00E+03 ND MW-62-18 2.04E+02 NA ND NA ND NA ND NA 2.00E+03 2.04E+02 MW-39-195 ND NA ND NA ND NA NA NA 1.00E+03 ND MW-62-37 2.59E+02 NA 1.91E+02 NA ND NA ND NA 2.00E+03 2.25E+02 MW-40-27 ND NA 1.93E+02 NA 2.06E+02 NA ND NA 1.00E+03 2.00E+02 MW-62-53 3.25E+02 NA 1.59E+02 NA ND NA ND NA 2.00E+03 2.42E+02 MW-40-46 2.35E+02 NA ND NA 1.63E+02 NA ND NA 1.00E+03 1.99E+02 MW-62-71 3.77E+02 NA 3.25E+02 NA 4.17E+02 NA 5.38E+02 NA 2.00E+03 4.14E+02 MW-40-81 1.92E+02 NA ND NA 2.48E+02 NA ND NA 1.00E+03 2.20E+02 MW-62-92 5.96E+02 NA 3.18E+02 NA 4.82E+02 NA 5.09E+02 NA 2.00E+03 4.76E+02 MW-40-100 ND NA ND NA ND NA ND NA 1.00E+03 ND MW-62-138 6.54E+02 NA 5.91E+02 NA ND NA 5.17E+02 NA 2.00E+03 5.87E+02 MW-40-127 ND NA ND NA ND NA ND NA 1.00E+03 ND MW-62-182 4.77E+02 NA 2.78E+02 NA 4.76E+02 NA ND NA 2.00E+03 4.10E+02 MW-40-162 ND NA ND NA ND NA ND NA 1.00E+03 ND MW-63-18 3.16E+02 NA ND NA 1.97E+02 NA 4.90E+02 NA 2.00E+03 3.34E+02 MW-41-40 4.32E+02 NA 2.79E+03 NA 2.43E+03 NA 2.03E+03 NA 1.00E+03 1.92E+03 MW-63-34 2.89E+02 NA 1.89E+02 NA 3.41E+02 NA 2.98E+02 NA 2.00E+03 2.79E+02 MW-41-63 4.36E+02 NA 5.18E+02 NA 5.06E+02 NA 1.23E+03 NA 1.00E+03 6.72E+02 MW-63-50 4.13E+02 NA 2.72E+02 NA 3.29E+02 NA 4.35E+02 NA 2.00E+03 3.62E+02 MW-42-49 1.30E+03 NA 1.69E+03 NA 1.28E+03 NA 1.49E+03 NA 3.16E+04 1.44E+03 MW-63-93 3.03E+02 NA 1.95E+02 NA 2.39E+02 NA ND NA 2.00E+03 2.46E+02 MW-42-78 3.93E+02 NA 6.31E+02 NA 6.13E+02 NA 5.98E+02 NA 1.00E+03 5.59E+02 MW-63-112 4.47E+02 NA 3.71E+02 NA 3.01E+02 NA 3.38E+02 NA 2.00E+03 3.64E+02 MW-43-28 2.25E+02 NA ND NA 1.95E+02 NA ND NA 1.00E+03 2.10E+02 MW-63-121 6.06E+02 NA 5.39E+02 NA 5.20E+02 NA 5.03E+02 NA 2.00E+03 5.42E+02 MW-43-62 2.16E+02 NA ND NA ND NA ND NA 1.00E+03 2.16E+02 MW-63-163 5.29E+02 NA 4.13E+02 NA 4.44E+02 NA 6.05E+02 NA 2.00E+03 4.98E+02 MW-44-66 NA 4.75E+02 1.75E+02 NA 3.10E+02 NA 4.57E+02 NA 1.00E+03 3.54E+02 MW-63-174 4.98E+02 NA 3.33E+02 NA 2.63E+02 NA 4.13E+02 NA 2.00E+03 3.77E+02 MW-44-102 NA 4.94E+02 2.76E+02 NA 4.47E+02 NA 3.93E+02 NA 1.00E+03 4.02E+02 MW-66-21 9.50E+02 NA 1.07E+03 NA ND NA 4.77E+02 NA 1.33E+03 8.32E+02 MW-45-42 2.02E+03 NA 3.69E+03 NA 2.74E+03 NA 8.12E+03 NA 5.90E+03 4.14E+03 MW-66-36 3.64E+03 NA 3.08E+03 NA 3.13E+03 NA 3.01E+03 NA 7.71E+03 3.22E+03 MW-45-61 9.89E+02 NA 1.00E+03 NA 1.51E+03 NA 1.84E+03 NA 2.65E+03 1.34E+03 MW-67-39 3.30E+03 NA 3.37E+03 NA 3.56E+03 NA 3.85E+03 NA 6.52E+03 3.52E+03 MW-46 7.62E+02 NA 1.92E+03 NA 3.13E+03 NA 2.47E+03 NA 1.84E+03 2.07E+03 MW-67-105 1.54E+03 NA 1.26E+03 NA 1.14E+03 NA 9.94E+02 NA 3.92E+03 1.23E+03 MW-49-26 3.00E+03 NA 3.03E+03 NA 2.59E+03 NA 3.17E+03 NA 6.52E+03 2.95E+03 MW-67-173 6.78E+02 NA 6.72E+02 NA 6.25E+02 NA ND NA 1.61E+03 6.58E+02 MW-49-42 2.76E+03 NA 2.27E+03 NA 2.39E+03 NA 2.45E+03 NA 4.97E+03 2.47E+03 MW-67-219 1.20E+03 NA 1.11E+03 NA 1.15E+03 NA 6.41E+02 NA 2.26E+03 1.03E+03 MW-49-65 1.55E+03 NA 1.32E+03 NA 1.37E+03 NA 1.94E+03 NA 3.03E+03 1.55E+03 MW-67-276 1.09E+03 NA 9.33E+02 NA 1.01E+03 NA 8.75E+02 NA 2.01E+03 9.77E+02 MW-50-42 1.36E+03 NA 1.61E+02 NA 8.67E+02 NA 5.61E+02 NA 1.04E+03 7.37E+02 MW-67-323 4.44E+02 NA 4.32E+02 NA ND NA ND NA 1.00E+03 4.38E+02 MW-50-66 2.76E+03 NA 3.51E+03 NA 3.72E+03 NA 3.76E+03 NA 5.90E+03 3.44E+03 MW-67-340 6.57E+02 NA 4.86E+02 NA 5.31E+02 NA ND NA 1.01E+03 5.58E+02 MW-51-40 ND NA 1.70E+02 NA 1.48E+02 NA ND NA 1.00E+03 1.59E+02 MW-107 ND NA NA NA NA NA NA NA 1.00E+03 ND MW-51-79 ND NA 1.10E+02 NA ND NA ND NA 1.00E+03 1.10E+02 MW-111 3.35E+04 NA 3.86E+04 4.69E+04 4.59E+04 NA NA NA 6.15E+04 4.12E+04 MW-51-104 ND NA ND NA ND NA ND NA 1.00E+03 ND U3-4D 1.07E+03 NA 6.84E+02 NA 7.12E+02 NA 6.28E+02 NA 1.00E+03 7.74E+02 MW-51-135 ND NA ND NA ND NA ND NA 1.00E+03 ND U3-4S NA NA 3.74E+02 NA 3.51E+02 NA NA NA 1.00E+03**

3.62E+02 MW-51-163 ND NA ND NA ND NA ND NA 1.00E+03 ND U3-T1 5.00E+02 NA 3.84E+02 NA 3.04E+02 NA 6.55E+02 NA 1.00E+03 4.61E+02 MW-51-189 ND NA ND NA ND NA ND NA 1.00E+03 ND U3-T2 9.75E+02 NA 8.76E+02 NA 1.47E+03 NA 2.27E+03 NA 2.08E+03 1.40E+03 MW-52-11 3.73E+02 NA NA NA NA NA NA NA 1.00E+03 3.73E+02 U1-CSS 1.88E+03 NA NA NA 2.26E+03 NA NA NA 5.17E+03 2.07E+03 MW-52-18 3.01E+02 NA NA NA NA NA NA NA 1.00E+03 3.01E+02 U1-NCD NA NA 1.35E+04 NA 3.34E+03 NA NA NA 8.42E+03 MW-52-48 ND NA NA NA NA NA NA NA 1.00E+03 ND U1-SFDS NA NA 6.44E+02 NA 4.82E+02 NA NA NA 5.63E+02 MW-52-64 ND NA NA NA NA NA NA NA 1.00E+03 ND I-2 NA NA ND NA ND NA NA NA 1.00E+03**

ND MW-52-122 ND NA NA NA NA NA NA NA 1.00E+03 ND LAF-002 NA ND NA NA ND NA NA NA positive ND MW-52-162 2.60E+02 NA NA NA NA NA NA NA 1.00E+03 2.60E+02 B-1 8.15E+02 NA 1.40E+04 NA 2.37E+03 NA 3.82E+03 NA 5.25E+03 MW-52-181 2.18E+02 NA NA NA NA NA NA NA 1.00E+03 2.18E+02 B-6 ND NA ND NA ND NA 8.39E+02 NA 8.39E+02 MH-5 VCFD NA 4.33E+02 9.96E+03 7.32E+02_8.80E+02 4.60E+02 NA 5.17E+03 NA 2.94E+03 Notes:

Well ID Tritium Results (pCi/L)

Investigation Level Investigation Level Tritium Results (pCi/L)

5) ** Indicates 2011 I.L. computed based on the 2010 rolling average due to absence of 2009 data.

4)

• Indicates storm or foundation drain sampling locations, for which investigation levels are not applicable.

2) A shaded value indicates that the reported activity exceeds the Investigation Level (I.L.) that was applicable at the time of sampling. NA indicates that data is not available for this time period.

Rolling Annual Average Rolling Annual Average

1) Only results greater than the MDC are reported herein. ND therefore indicates that the analytical result was below the MDC and typically also below the standard deviation threshold of three times 1 sigma. The rolling average is calculated using only results greater than the MDC. Given that ND represents real groundwater sampling results where the radionuclide activity level is either positive but very low and unquantifiable, or not detectable above background, its exclusion results in a high bias to the average and thus adds a measure of conservatism to the subsequent dose computations.

3) To be conservative, the 2011 Tritium I.L.s were calculated using (2x the 2009 rolling average) due to an increased Tritium activity observed in multiple Unit 2 wells during 2010 in response to the transient surface spill from the temporary, rental RWST/R.O. processing skid.

shaded value