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Annual Groundwater Monitoring Report

Appalachian Power Company

Mountaineer Plant

Bottom Ash Pond CCR Management Unit

Letart, WV

January 2018

Prepared by:

American Electric Power Service Corporation

1 Riverside Plaza

Columbus, Ohio 43215

i

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Table of Contents I. Overview .......................................................................................................................................... 1

II. Groundwater Monitoring Well Locations and Identification Numbers ........................................... 3

III. Monitoring Wells Installed or Decommissioned ............................................................................. 4

IV. Groundwater Quality Data and Static Water Elevation Data and With Flow Rate and Flow

Directions ......................................................................................................................................... 4

V. Discussion About Transition Between Monitoring Requirements or Alternate Monitoring

Frequency ......................................................................................................................................... 4

VI. Other Information Required ............................................................................................................. 4

VII. Description of Any Problems Encountered in 2017 and Actions Taken ......................................... 5

VIII. A Projection of Key Activities for the Upcoming Year ................................................................... 5

Appendix I

1

I. Overview

This Annual Groundwater Monitoring and Corrective Action Report (Report) has been prepared

to report the status of activities for the preceding year for the bottom ash pond CCR unit at

Appalachian Power Company’s, a wholly-owned subsidiary of American Electric Power

Company (AEP), Mountaineer Power Plant. The USEPA’s CCR rules require that the Annual

Groundwater Monitoring and Corrective Action Report be posted to the operating record for the

preceding year no later than January 31, 2018.

In general, the following activities were completed:

Monitoring wells were installed and developed to establish a certified groundwater

monitoring system around each CCR unit, in accordance with the requirements of 40

CFR 257.91 pursuant AEP’s Groundwater Monitoring Network Evaluation;

Groundwater samples were collected and analyzed for Appendix III and Appendix IV

constituents, as specified in 40 CFR 257.94 et seq. and AEP’s Groundwater Sampling

and Analysis Plan;

Groundwater data underwent various validation tests, including tests for completeness,

valid values, transcription errors, and consistent units;

Background values for each Appendix III and Appendix IV constituent were established

Detection Monitoring sampling was initiated

A statistical process in accordance with 40 CFR 257.93 to evaluate groundwater data was

prepared, certified, and posted to AEP’s CCR website in April 2017. AEP’s Statistical

Analysis Plan (AEP 2017). The statistical process was guided by USEPA’s Statistical

Analysis of Groundwater Monitoring Data at RCRA Facilities, Unified Guidance

(“Unified Guidance”, USEPA, 2009). Data evaluation is underway.

The major components of this annual report, to the extent applicable at this time, are presented in

sections that follow:

A map, aerial photograph or a drawing showing the CCR management unit(s), all

groundwater monitoring wells and monitoring well identification numbers.

Identification of any monitoring wells that were installed or decommissioned during the

preceding year, along with a statement as to why that happened.

All of the monitoring data collected, including the rate and direction of groundwater

flow, plus a summary showing the number of samples collected per monitoring well, the

dates the samples were collected and whether the sample was collected as part of

detection monitoring or assessment monitoring programs (Attached as Appendix I).

2

A summary of any transition between monitoring programs or an alternate monitoring

frequency, for example the date and circumstances for transitioning from detection

monitoring to assessment monitoring, in addition to identifying the constituents detected

at a statistically significant increase over background concentrations.

Other information required to be included in the annual report such as alternate source

demonstration or assessment of corrective measures, if applicable

In addition, this report summarizes key actions completed, and where applicable, describes any

problems encountered and actions taken to resolve those problems. The report includes a

projection of key activities for the upcoming year.

3

II. Groundwater Monitoring Well Locations and Identification Numbers

The figure that follows depicts the PE-certified groundwater monitoring network, the monitoring

well locations and their corresponding identification numbers. The total groundwater monitoring

network includes 4 up-gradient wells and 8 down-gradient wells. The monitoring well

distribution adequately cover down-gradient and up-gradient areas as detailed in the Ground

Water Monitoring Well Network Evaluation report that was placed in the American Electric

Power CCR public internet site on March 9, 2017.

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MW-1601A

MW-1602

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MW-1604SMW-1604D

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P:\Projects\AEP\Groundwater Statistical Evaluation - CHA8423\Groundwater Mapping\GIS Files\MXD\Conesville\Ash Pond\AEP-Mountaineer_BAP_Site_Layout.mxd. ARevezzo. 1/26/2018. CHA8423/07/08.

AEP Mountaineer Generating PlantLetart, West Virginia

Site LayoutCCR Bottom Ash Ponds

³

Figure1Columbus, Ohio 2018/01/26

Monitoring Well Network!A Compliance Sampling Location!A Background Sampling Location

Bottom Ash Ponds

Notes- Monitoring well coordinates provided by AEP.- Site features based on information available in Ash Pond System-CCRGroundwater Monitoring Well Network Evaluation (Arcadis, 2016) provided by AEP.

1,000 0 1,000500Feet

Ohio River

4

III. Monitoring Wells Installed or Decommissioned

There were no monitoring wells installed or decommissioned in 2017. The network design, as

summarized in the Groundwater Monitoring Network Design Report (March 9, 2017) and as

posted at the CCR web site for Mountaineer Plant, did not change. That design report, viewable

on the AEP CCR web site, discusses the facility location, the hydrogeological setting, the

hydrostratigraphic units, the uppermost aquifer, downgradient monitoring well locations and the

upgradient monitoring well locations.

IV. Groundwater Quality Data and Static Water Elevation Data and Flow Rate

Appendix I contains tables showing the groundwater quality data collected during the

establishment of background quality. Static water elevation data from each monitoring event

also are shown in Appendix I, along with the groundwater velocity calculations, groundwater

flow direction and potentiometric maps developed after each sampling event.

V. Discussion About Transition Between Monitoring Requirements or Alternate

Monitoring Frequency

As of this first annual groundwater report date there has been no transition between detection

monitoring and assessment monitoring. Detection monitoring will continue in 2018. The

sampling frequency of twice per year will be maintained for the Appendix III parameters (boron,

calcium, chloride, fluoride, pH, sulfate and total dissolved solids).

Regarding defining an alternate monitoring frequency, the groundwater velocity and monitoring

well production is high enough at this facility that no modification of the twice-per-year

detection monitoring effort is needed.

VI. Other Information Required

At the appropriate time the geochemical analyses, coupled with the statistical analyses of the

groundwater quality data, will determine whether an alternate source or alternate sources are

affecting groundwater chemistry. In those cases where an alternative source(s) demonstration is

made, those analyses and supporting information will be presented as well.

5

VII. Description of Any Problems Encountered in 2017 and Actions Taken

No significant problems were encountered. The low flow sampling effort went smoothly and the

schedule was met to support this first annual groundwater report preparation.

VIII. A Projection of Key Activities for the Upcoming Year

Key activities for 2018 include:

Detection monitoring on a twice per year schedule

Evaluation of the first detection monitoring results from a statistical analysis viewpoint,

looking for any statistically significant increases, or decreases when pH is considered.

Responding to any new data received in light of what the CCR rule requires

Preparation of the second annual groundwater report

6

APPENDIX I

Tables follow, showing the groundwater monitoring data collected, the rate and direction of

groundwater flow, and a summary showing the number of samples collected per monitoring

well. The dates that the samples were collected also is shown. Since this is the first annual

groundwater report, which summarizes only the 2017 activities, there is no need to state whether

each sample was collected as part of a detection monitoring or an assessment monitoring

program.

Table 1: Groundwater Data SummaryMountaineer Plant - Bottom Ash Pond

9/28/2016 11/1/2016 12/19/2016 2/20/2017 3/27/2017 4/18/2017 5/15/2017 6/12/2017 10/30/2017Detection

Antimony µg/L 0.0500 0.0500 J 0.0500 J 0.0300 J 0.0300 J 0.0300 J 0.0400 J 0.0400 J -Arsenic µg/L 0.620 0.610 0.650 0.550 0.490 0.590 0.790 0.610 -Barium µg/L 46.6 45.2 47.0 41.4 40.2 47.5 56.9 49.0 -

Beryllium µg/L <0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.004 U <0.004 U <0.004 U -Boron mg/L 0.211 0.170 0.196 0.253 0.515 0.259 0.224 0.285 0.224

Cadmium µg/L 0.0100 J 0.0200 J 0.0200 J 0.0200 J 0.0100 J 0.0100 J 0.0200 J 0.0200 J -Calcium mg/L 141 122 130 117 119 130 159 138 137Chloride mg/L 21.8 17.3 20.4 31.0 42.1 55.3 74.4 57.7 49.4

Chromium µg/L 0.300 1.30 0.806 0.198 0.225 0.170 0.166 0.152 -Cobalt µg/L 0.116 0.0860 0.282 0.132 0.0970 0.0930 0.154 0.0980 -

Combined Radium pCi/L 0.438 2.01 1.54 0.313 0.495 0.814 1.28 0.599 -Fluoride mg/L 0.170 0.190 0.180 0.200 0.190 0.190 0.180 0.180 0.190

Lead µg/L 0.132 0.108 0.383 0.139 0.0690 0.0520 0.141 0.0630 -Lithium mg/L 0.00200 0.00100 <0.0002 U 0.00500 0.00600 0.00700 <0.0002 U 0.00400 -Mercury µg/L <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U 0.00300 J <0.002 U <0.002 U -

Molybdenum µg/L 2.61 2.36 0.930 1.42 2.85 1.53 2.04 1.13 -Selenium µg/L 1.30 1.10 1.10 1.40 1.00 1.50 1.30 1.50 -

Total Dissolved Solids mg/L 538 534 544 568 530 580 676 586 564Sulfate mg/L 130 136 141 135 148 169 197 170 169

Thallium µg/L 0.0530 0.0580 0.0400 J 0.0700 0.0300 J 0.0400 J 0.0400 J 0.0400 J -pH SU 7.55 7.22 7.20 7.16 7.06 7.13 7.71 6.91 7.06

Notes:µg/L: micrograms per litermg/L: milligrams per literpCi/L: picocuries per literSU: standard unitU: Non-detect value. Parameters which were not detected are shown as less than the method detection limit (MDL).J: Estimated value. Parameter was detected in concentrations below the reporting limit.-: Not sampledFor statistical analysis, parameters which were not detected were replaced with the reporting limit.

MW-1601A

BackgroundParameter Unit

Page 1 of 12


Antimony µg/LArsenic µg/LBarium µg/L

Beryllium µg/LBoron mg/L

Cadmium µg/LCalcium mg/LChloride mg/L

Chromium µg/LCobalt µg/L

Combined Radium pCi/LFluoride mg/L

Lead µg/LLithium mg/LMercury µg/L

Molybdenum µg/LSelenium µg/L

Total Dissolved Solids mg/LSulfate mg/L

Thallium µg/LpH SU

Parameter Unit 9/28/2016 11/1/2016 12/19/2016 2/20/2017 3/27/2017 4/17/2017 5/15/2017 6/12/2017 10/30/2017Detection

0.0200 J 0.0200 J 0.0200 J <0.01 U 0.0100 J 0.0200 J 0.0200 J 0.0300 J -0.400 0.350 0.430 0.350 0.340 0.360 0.420 0.360 -27.1 28.7 28.9 26.9 29.9 32.1 33.2 33.1 -

<0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.004 U <0.004 U <0.004 U -0.141 0.115 0.120 0.0930 0.240 0.107 0.115 0.153 0.0930

0.0200 J 0.0200 J 0.0100 J 0.0100 J 0.0200 J 0.0100 J 0.0200 J 0.0100 J -74.9 71.1 74.7 69.6 86.6 91.1 105 94.0 78.17.95 8.70 9.91 9.76 12.0 12.1 12.6 11.8 8.41

0.200 0.600 1.65 0.194 0.456 0.240 0.136 0.408 -0.217 0.108 0.225 0.0520 0.0590 0.0490 0.0720 0.0660 -0.275 2.09 0.705 0.750 0.679 0.337 1.91 0.290 -0.170 0.180 0.180 0.190 0.190 0.200 0.190 0.200 0.2300.255 0.0700 0.272 0.0520 0.0630 0.0870 0.0780 0.0610 -

0.0130 0.0140 0.00800 0.0130 0.0190 0.0170 0.00900 0.0180 -<0.002 U <0.002 U <0.002 U <0.002 U <0.002 U 0.00200 J <0.002 U <0.002 U -

0.900 1.48 0.560 0.630 1.49 0.660 1.28 0.530 -0.0800 J 0.100 0.0800 J 0.100 0.200 0.100 0.100 0.100 -

412 424 470 494 504 520 598 588 468167 178 188 193 231 248 273 269 184

0.0920 0.116 0.0200 J 0.0200 J 0.0100 J 0.0100 J 0.0400 J 0.0200 J -7.26 6.59 6.93 6.53 6.28 6.66 7.04 6.75 6.67


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Thallium µg/LpH SU


0.0200 J 0.0200 J 0.0300 J 0.0100 J 0.0200 J 0.0300 J 0.0300 J 0.0300 J -0.360 0.360 0.400 0.370 0.360 0.520 0.430 0.350 -29.5 34.1 33.1 31.7 32.9 33.7 33.0 32.0 -

<0.005 U <0.005 U <0.005 U <0.005 U <0.005 U 0.00500 J <0.004 U <0.004 U -0.327 0.334 0.495 0.543 0.781 0.519 0.546 0.535 0.360

0.0200 J 0.0100 J 0.0100 J 0.0100 J 0.0100 J 0.0100 J 0.0100 J 0.0100 J -124 146 164 169 181 170 187 176 17115.7 22.8 30.1 27.4 25.2 22.9 24.7 20.5 13.1

0.300 0.400 2.37 0.229 0.545 0.304 0.415 0.963 -0.317 0.166 0.134 0.105 0.0930 0.377 0.101 0.0850 -

0.0927 2.59 0.966 0.384 0.207 0.615 1.61 0.776 -0.0700 J 0.0800 J 0.100 J 0.100 J 0.100 J 0.100 J 0.100 J 0.100 J 0.100 J

0.253 0.131 0.0840 0.0770 0.0800 0.308 0.0790 0.0590 -0.0210 0.0220 0.0100 0.0120 0.0200 0.0180 0.0120 0.0210 -

<0.002 U <0.002 U <0.002 U <0.002 U <0.002 U 0.00300 J <0.002 U <0.002 U -1.21 2.47 0.360 0.370 0.720 0.270 0.710 0.290 -

0.100 0.400 0.300 0.400 0.200 0.200 0.100 0.100 -618 814 908 962 918 910 910 878 872388 483 504 485 476 474 470 482 553

0.0200 J 0.0400 J 0.0630 0.0200 J <0.01 U 0.0100 J 0.0200 J 0.0100 J -7.27 6.56 7.41 6.78 6.60 6.93 7.38 6.95 6.58


MW-1603

Background

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Thallium µg/LpH SU


0.140 0.150 0.140 0.110 0.130 0.120 0.130 0.150 -0.480 0.590 0.570 0.450 0.410 0.490 0.540 0.460 -29.1 28.4 30.3 26.2 28.9 27.9 27.5 27.9 -

<0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.004 U <0.004 U <0.008 U -3.54 2.98 3.07 3.01 4.18 2.97 2.95 2.98 2.60

0.140 0.170 0.170 0.130 0.130 0.0900 0.100 0.150 -306 277 289 260 293 269 300 283 295111 116 118 111 112 109 112 118 116

0.400 0.500 0.798 0.297 0.416 0.323 0.0790 0.180 -1.76 1.78 1.92 1.85 1.74 1.60 1.60 1.95 -1.38 1.06 1.45 0.824 0.806 1.54 3.49 1.06 -

0.180 0.190 0.170 0.210 0.190 0.200 0.180 0.180 0.2000.106 0.0390 0.0200 J 0.0200 J 0.0220 0.584 0.0270 0.0300 J -

0.0590 0.0570 0.0450 0.0500 0.0640 0.0510 0.0520 0.0580 -<0.002 U 0.0360 <0.002 U <0.002 U <0.002 U 0.00300 J <0.002 U <0.002 U -

19.8 20.0 20.8 17.4 18.2 17.4 18.1 18.3 -0.900 1.00 1.00 0.700 0.700 0.700 0.500 0.800 -1650 1580 1630 1640 1660 1570 1610 1620 1570865 866 863 823 814 797 828 856 833

0.235 0.261 0.283 0.264 0.336 0.217 0.231 0.256 -7.28 7.30 7.41 7.20 7.16 7.19 7.87 7.52 7.21


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Background

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Thallium µg/LpH SU


0.0400 J 0.0400 J 0.0400 J 0.0300 J 0.0300 J 0.0300 J 0.0400 J 0.0300 J -0.390 0.460 0.420 0.420 0.370 0.440 0.510 0.410 -29.4 27.2 26.6 26.7 31.6 28.9 32.2 28.7 -

<0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.004 U <0.004 U <0.004 U -2.12 1.90 2.35 3.08 4.04 3.68 3.63 3.48 2.17

0.0300 0.0400 0.0400 0.0400 0.0300 0.0400 0.0400 0.0400 -178 167 165 168 180 191 202 182 16783.9 99.4 99.9 112 116 130 122 112 85.3

0.200 0.300 1.97 0.379 0.692 0.158 0.0980 0.149 -0.358 0.307 0.390 0.501 0.308 0.317 0.317 0.308 -0.136 0.769 0.526 0.920 0.585 0.722 2.58 0.598 -0.200 0.210 0.190 0.210 0.200 0.210 0.190 0.200 0.2100.114 0.0650 0.0930 0.140 0.0550 0.0510 0.100 0.0330 -

0.0340 0.0350 0.0230 0.0330 0.0420 0.0410 0.0330 0.0380 -<0.002 U <0.002 U <0.002 U <0.002 U <0.002 U 0.00300 J <0.002 U <0.002 U -

3.20 2.47 2.71 2.52 2.53 2.53 2.54 2.41 -3.10 2.50 2.70 2.20 2.20 1.70 2.00 2.50 -1280 1310 1300 1430 1420 1500 1510 1400 1150602 626 618 634 663 716 708 685 544

0.0300 J 0.0200 J 0.0300 J 0.0300 J 0.119 0.0200 J 0.0400 J 0.0200 J -7.04 7.10 7.19 7.04 6.94 7.01 7.67 7.53 7.09


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Background

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Thallium µg/LpH SU


0.0300 J 0.0300 J 0.0300 J 0.0400 J 0.0400 J 0.0300 J 0.0300 J 0.0400 J -2.29 2.48 2.26 2.23 2.01 2.25 2.45 1.99 -31.5 30.6 28.2 25.9 27.9 25.8 26.3 27.2 -

<0.01 U <0.01 U <0.01 U <0.005 U <0.005 U <0.008 U <0.004 U <0.008 U -12.2 9.96 9.35 9.16 11.6 9.06 8.77 9.09 7.83

0.0400 0.0400 0.0400 J 0.0300 0.0300 0.0200 J 0.0200 J 0.0400 -462 381 341 318 344 360 374 351 324195 195 168 163 169 172 187 196 198

0.100 0.200 2.29 0.282 0.556 0.127 0.0990 0.120 -1.91 1.79 1.75 1.84 1.69 1.69 1.63 1.86 -1.06 1.93 2.66 1.03 0.578 0.821 3.43 0.668 -

0.180 0.190 0.180 0.200 0.200 0.200 0.200 0.170 0.2100.0800 0.0440 0.0300 J 0.0210 0.0200 J 0.0200 J 0.0100 J 0.0200 J -0.0850 0.0780 0.0630 0.0710 0.0860 0.0770 0.0750 0.0810 -

<0.002 U <0.002 U <0.002 U <0.002 U <0.002 U 0.00200 J <0.002 U <0.002 U -54.6 52.4 54.7 46.8 44.6 43.2 48.1 45.5 -

0.200 0.200 0.300 0.200 0.200 0.200 J 0.200 0.400 -2650 2510 2300 2290 2350 2280 2240 2260 21701480 1500 1290 1190 1200 1180 1130 1190 1170

0.0600 J 0.0500 J 0.0500 J 0.138 0.0900 0.0400 J 0.0400 J 0.0500 J -7.60 7.37 7.37 7.31 7.16 7.48 7.90 - 7.32


MW-1605D

Background

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Thallium µg/LpH SU


0.160 0.0700 0.0700 J 0.0400 J 0.0300 J 0.0600 J 0.0600 J 0.0500 J -1.38 0.930 0.880 0.860 0.630 0.740 0.880 0.750 -49.6 38.2 37.0 36.0 32.5 31.9 33.3 30.8 -

0.0200 J 0.00900 J <0.01 U 0.00700 J <0.005 U <0.008 U <0.008 U <0.008 U -8.30 6.55 7.30 9.04 10.8 8.69 8.75 8.80 5.88

0.130 0.0800 0.0800 0.0800 0.0600 0.0800 0.0800 0.0800 -224 220 279 249 261 244 251 218 212150 159 173 179 212 180 217 191 222

0.600 0.700 2.85 0.390 0.349 0.245 0.585 0.387 -3.16 1.26 0.861 1.10 0.448 0.715 0.647 0.708 -

0.777 2.69 0.337 0.785 0.466 0.827 2.73 0.611 -0.240 0.250 0.220 0.250 0.250 0.230 0.260 0.240 0.2502.18 0.793 0.410 0.636 0.181 0.285 0.382 0.541 -

0.0860 0.0840 0.0760 0.0680 0.0760 0.0670 0.0760 0.0710 -<0.002 U <0.002 U <0.002 U <0.002 U <0.002 U 0.00300 J <0.002 U <0.002 U -

25.8 23.9 22.9 17.5 15.4 20.8 18.6 17.8 -1.10 0.900 0.700 1.10 1.00 3.00 1.70 1.70 -1910 1930 2160 2220 2250 2120 2160 1980 2000965 1010 1180 1110 1110 1100 1060 1000 1040

0.174 0.0550 0.0500 J 0.0550 0.102 0.0400 J 0.0600 J 0.0500 J -7.45 7.34 7.35 7.19 7.05 7.36 7.74 7.77 7.18


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Thallium µg/LpH SU


0.190 0.190 0.160 0.160 0.150 0.250 0.190 0.160 -0.710 0.840 0.630 0.510 0.440 1.38 0.630 0.520 -64.0 62.6 58.4 52.6 53.6 64.2 56.7 52.0 -

0.00500 J <0.005 U <0.005 U <0.005 U <0.005 U 0.0100 J 0.0310 <0.008 U -4.29 3.97 4.96 5.48 6.90 5.46 5.26 5.90 7.03

0.0700 0.0700 0.0600 0.0700 0.0500 0.0800 0.0700 0.0800 -278 252 260 242 247 274 278 262 287190 201 206 190 187 104 218 219 213

0.300 0.900 0.736 0.300 0.541 0.853 0.163 0.153 -2.20 1.92 1.52 1.33 1.17 4.26 1.39 1.46 -8.46 3.66 1.18 1.71 1.46 1.21 3.18 1.03 -

0.250 0.280 0.240 0.260 0.260 0.260 0.260 0.240 0.2400.522 0.491 0.164 0.0820 0.0870 2.04 0.162 0.0840 -0.129 0.120 0.110 0.109 0.130 0.119 0.124 0.132 -

<0.002 U <0.002 U <0.002 U <0.002 U <0.002 U 0.00400 J <0.002 U <0.002 U -81.4 81.2 83.2 76.6 73.3 71.5 79.1 77.8 -1.80 4.70 3.60 4.10 3.60 4.10 5.90 8.10 -1710 1720 1690 1670 1700 1690 1730 1680 1590813 796 796 759 739 385 764 752 770

0.123 0.0920 0.0940 0.119 0.113 0.0970 0.0950 0.0900 J -7.16 7.43 7.54 7.33 7.22 7.42 8.00 7.47 7.34


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Thallium µg/LpH SU


0.160 0.170 0.160 0.150 0.140 0.160 0.160 0.160 -0.880 0.940 0.830 0.880 0.780 0.860 0.900 0.810 -76.7 69.7 71.6 77.2 75.7 74.2 74.1 77.1 -

<0.005 U <0.005 U <0.005 U <0.005 U <0.005 U <0.004 U <0.004 U <0.008 U -5.25 4.57 5.35 5.03 6.67 5.80 5.72 6.12 9.54

0.0800 0.0700 0.0700 0.0800 0.0600 0.0700 0.0700 0.0900 -219 183 200 211 217 228 228 230 226182 183 170 231 226 217 227 230 187

0.200 0.400 1.26 0.384 0.742 0.134 0.0930 0.178 -0.466 0.432 0.280 0.372 0.258 0.234 0.241 0.281 -0.592 1.55 1.66 0.993 0.945 1.30 2.17 1.28 -0.500 0.570 0.460 0.460 0.450 0.430 0.450 0.450 0.4600.234 0.207 0.0840 0.158 0.0960 0.0700 0.0620 0.0900 -0.116 0.103 0.102 0.108 0.126 0.117 0.110 0.118 -

<0.002 U <0.002 U <0.002 U <0.002 U <0.002 U 0.00200 J <0.002 U <0.002 U -112 112 101 93.1 90.1 92.4 90.2 95.7 -1.20 1.00 0.900 0.700 0.700 0.800 0.900 0.900 -1470 1470 1420 1500 1500 1540 3230 1540 1410621 638 621 578 589 615 635 643 644

0.0740 0.0600 0.0630 0.0860 0.100 0.0620 0.0690 0.0700 J -5.99 7.24 7.33 7.13 7.03 7.20 7.74 7.39 7.13


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Thallium µg/LpH SU


0.0400 J 0.0300 J 0.0300 J 0.0300 J 0.0500 0.0300 J 0.0300 J 0.0300 J -0.910 1.02 1.02 1.14 1.24 1.00 1.11 0.980 -117 155 168 133 140 126 129 131 -

<0.005 U <0.005 U <0.005 U <0.005 U 0.00800 J <0.004 U <0.004 U <0.004 U -1.64 1.42 1.46 1.54 1.89 1.58 1.54 1.50 1.76

0.0200 J 0.0200 J 0.00500 J <0.004 U 0.0300 <0.005 U <0.005 U <0.005 U -141 155 187 165 162 168 156 159 21488.3 103 118 107 106 104 102 104 138

0.300 0.700 2.07 0.0900 0.602 0.133 0.0780 0.141 -0.439 0.396 0.526 0.481 0.805 0.414 0.399 0.439 -0.860 4.00 1.69 0.883 1.87 1.54 1.27 1.76 -0.540 0.610 0.500 0.510 0.520 0.520 0.520 0.490 0.4700.179 0.0580 0.0380 0.0410 0.628 0.0700 0.0410 0.124 -

0.0680 0.0690 0.0750 0.0720 0.0870 0.0790 0.0870 0.0880 -<0.002 U <0.002 U <0.002 U <0.002 U 0.00200 J 0.00200 J <0.002 U <0.002 U -

96.2 91.1 89.6 87.7 85.9 81.8 91.2 90.8 -0.100 0.0700 J 0.0300 J 0.0300 J 0.500 0.0500 J 0.0400 J 0.0300 J -744 856 1050 1010 938 904 876 872 1290285 376 474 415 393 383 347 365 626

0.0500 J 0.0400 J 0.0400 J 0.0400 J 0.0620 0.0200 J 0.0200 J 0.0400 J -6.90 7.77 7.72 7.62 7.64 7.62 8.41 7.57 7.58


MW-1607D

Background

Page 10 of 12










Thallium µg/LpH SU

Parameter Unit 9/27/2016 10/31/2016 11/2/2016 12/21/2016 2/21/2017 3/28/2017 4/18/2017 5/16/2017 6/14/2017 10/31/2017Detection

- 0.460 0.450 0.840 0.420 0.430 0.550 0.500 0.480 -- 1.86 1.30 11.2 1.19 1.17 1.62 1.17 1.10 -- 56.7 55.5 114 63.9 66.8 67.6 63.7 62.9 -- 0.0100 J <0.005 U 0.123 0.00700 J <0.005 U 0.0100 J <0.004 U <0.004 U -- 1.38 1.35 1.02 1.27 1.70 1.65 1.64 1.74 1.32- 0.0600 0.0400 0.220 0.0300 0.0200 0.0600 0.0300 0.0300 -- 126 126 129 131 131 135 133 136 165- 90.8 90.6 92.7 91.9 93.1 92.6 97.5 96.3 100- 0.800 0.400 3.10 0.325 0.390 0.514 0.226 0.200 -- 2.59 0.752 20.1 1.21 0.942 2.60 0.851 0.936 -- 2.50 1.34 2.81 1.97 1.15 1.63 2.41 1.02 -- 0.310 0.320 0.330 0.290 0.280 0.300 0.290 0.270 0.280- 1.40 0.264 11.0 0.267 0.134 1.25 0.159 0.138 -- 0.0980 0.0920 0.0880 0.0910 0.110 0.102 0.0940 0.106 -- 0.00300 J <0.002 U 0.0120 <0.002 U <0.002 U 0.00300 J <0.002 U <0.002 U -- 48.4 50.4 45.7 41.3 39.2 45.1 48.1 46.1 -- 7.10 7.00 9.40 9.00 9.20 8.90 9.10 9.40 -- 670 698 716 746 706 678 746 708 860- 213 214 246 244 233 225 221 229 343- 0.0600 0.0500 J 0.150 0.0690 0.0520 0.0580 0.0500 J 0.0500 J -

7.55 - 7.55 7.70 7.52 7.44 7.58 8.23 7.46 7.46Notes:µg/L: micrograms per litermg/L: milligrams per literpCi/L: picocuries per literSU: standard unitU: Non-detect value. Parameters which were not detected are shown as less than the method detection limit (MDL).J: Estimated value. Parameter was detected in concentrations below the reporting limit.-: Not sampledFor statistical analysis, parameters which were not detected were replaced with the reporting limit.

MW-1607S

Background

Page 11 of 12










Thallium µg/LpH SU


0.100 0.0400 J 0.0400 J 0.0300 J 0.0300 J 0.0400 J 0.0400 J 0.0300 J -0.820 0.530 0.680 0.520 0.560 0.500 0.490 0.490 -42.0 33.4 32.2 32.4 31.4 35.3 35.1 36.4 -

0.0200 J <0.005 U 0.00900 J <0.005 U <0.005 U <0.004 U <0.004 U <0.004 U -0.150 0.113 0.118 0.156 0.238 0.233 0.200 0.169 0.140

0.0300 0.0200 J 0.0200 0.0100 J 0.0100 J 0.0100 J 0.00800 J 0.00600 J -93.8 86.2 83.0 83.3 80.3 101 102 110 94.76.55 6.43 4.25 4.37 5.27 7.08 8.62 8.23 5.13

0.900 0.600 2.78 0.364 0.335 0.223 0.151 0.277 -1.21 0.254 0.588 0.240 0.330 0.196 0.0980 0.0400 -

0.454 2.28 0.379 1.24 0.417 0.130 0.857 0.146 -0.270 0.300 0.260 0.250 0.240 0.230 0.230 0.210 0.2200.881 0.232 0.405 0.205 0.274 0.173 0.0730 0.0240 -

0.00300 0.00400 <0.0002 U 0.00300 0.00600 0.00600 0.00600 0.0160 -<0.002 U <0.002 U <0.002 U <0.002 U <0.002 U 0.00200 J <0.002 U <0.002 U -

2.35 2.16 1.94 1.40 2.49 1.89 2.08 1.57 -1.20 1.30 1.10 1.50 1.30 1.30 1.00 1.10 -368 352 338 398 350 424 475 486 43070.6 64.3 58.3 94.4 112 168 208 204 131

0.0300 J 0.0810 0.0300 J 0.0530 0.0400 J 0.0100 J 0.0100 J 0.0200 J -7.39 7.26 7.32 7.07 6.77 7.01 7.75 6.66 7.13


MW-1608

Background

Page 12 of 12

Table 1: Residence Time Calculation Summary - Bottom Ash PondMountaineer Bottom Ash Pond

Geosyntec Consultants, Inc.

CCRManagement

Unit

MonitoringWell

Well Diameter (inches)

Groundwater Velocity (ft/year)

Groundwater Residence

Time (days)



Time (days)



Time (days)



Time (days)

MW-1601A [1] 2.0 84.3 0.7 21.3 2.9 1,270.8 0.0 52.4 1.2MW-1602 [1] 2.0 152.9 0.4 139.6 0.4 513.0 0.1 66.6 0.9MW-1603 [1] 2.0 317.2 0.2 320.8 0.2 315.2 0.2 214.6 0.3

MW-1604D [2] 2.0 15.0 4.1 85.9 0.7 417.0 0.1 105.9 0.6MW-1604S [2] 2.0 306.4 0.2 312.4 0.2 241.4 0.3 204.6 0.3MW-1605D [2] 2.0 327.2 0.2 249.2 0.2 82.9 0.7 135.1 0.5MW-1605S [2] 2.0 331.1 0.2 224.2 0.3 139.4 0.4 95.9 0.6MW-1606D [2] 2.0 379.4 0.2 185.8 0.3 210.8 0.3 175.7 0.3MW-1606S [2] 2.0 203.8 0.3 339.0 0.2 300.6 0.2 189.7 0.3MW-1607D [2] 2.0 440.6 0.1 99.0 0.6 163.1 0.4 206.0 0.3MW-1607S [2] 2.0 146.9 0.4 239.6 0.3 124.7 0.5 148.4 0.4MW-1608 [1] 2.0 172.4 0.4 127.3 0.5 100.2 0.6 227.6 0.3

CCRManagement

Unit

MonitoringWell

Well Diameter (inches)



Time (days)



Time (days)



Time (days)



Time (days)



Time (days)

MW-1601A [1] 2.0 82.9 0.7 52.5 1.2 38.1 1.6 79.8 0.8 31.9 1.9MW-1602 [1] 2.0 73.5 0.8 76.5 0.8 33.5 1.8 70.8 0.9 111.3 0.5MW-1603 [1] 2.0 157.6 0.4 111.9 0.5 133.1 0.5 174.0 0.3 275.9 0.2

MW-1604D [2] 2.0 110.5 0.6 61.0 1.0 26.0 2.3 290.1 0.2 369.4 0.2MW-1604S [2] 2.0 174.0 0.3 133.9 0.5 127.9 0.5 205.2 0.3 273.5 0.2MW-1605D [2] 2.0 101.2 0.6 112.6 0.5 121.9 0.5 148.4 0.4 304.2 0.2MW-1605S [2] 2.0 171.3 0.4 145.3 0.4 136.2 0.4 160.3 0.4 176.8 0.3MW-1606D [2] 2.0 145.3 0.4 140.1 0.4 107.4 0.6 108.4 0.6 286.9 0.2MW-1606S [2] 2.0 521.6 0.1 162.6 0.4 133.9 0.5 247.4 0.2 325.2 0.2MW-1607D [2] 2.0 161.6 0.4 124.7 0.5 224.8 0.3 88.4 0.7 482.8 0.1MW-1607S [2] 2.0 129.5 0.5 122.5 0.5 81.3 0.7 113.8 0.5 126.5 0.5MW-1608 [1] 2.0 226.0 0.3 158.8 0.4 88.7 0.7 258.4 0.2 168.2 0.4

Notes:[1] - Background Well[2] - Downgradient Well

2017-10

Bottom AshPond

Bottom AshPond

2016-09

2017-05 2017-06

2016-10 2016-12 2017-02

2017-03 2017-04

@A

@A@A

@A

@A

@A@A

!A!A

!A

@A

@A

@A

@A@A@A@A

@A@A

@A@A

@A

MW-001539.25

MW-002539.95

MW-004540.15

MW-005

MW-016541.3

JTMN-1539.4 JTMN-2

539.24

PZ-09-03

PZ-09-04

PZ-09-05

MW-1601A544.58

MW-1602544.76

MW-1603543.67

MW-1604S542.54

MW-1604D542.74

MW-1605S542.51

MW-1605D542.52

MW-1606S543.19MW-1606D543.15

MW-1607S 543.52MW-1607D543.56

MW-1608541.35

544.5

544.25

544

543.75

543542.75542.5

542.25

542

541.75

541.5

541.25

541

540.75

540.5

540.25

540

539.75

539.5539.25

543.5543.25

539.5

P:\Projects\AEP\Groundwater Statistical Evaluation - CHA8423\Groundwater Mapping\GIS Files\MXD\Mountaineer\AEP-Mountaineer_BAP_GW_2016-09.mxd. CGregory. 12/28/2017. CHA8423/07/08.

AEP Mountaineer Generating Plant - Bottom Ash PondsLetart, West Virginia

Potentiometric Surface Map - Uppermost AquiferSeptember 2016

³


Bottom AshPond (East)

Legend@A Monitoring Well!A Piezometer

Groundwater Elevation ContourApproximate Groundwater Flow Direction

Notes- Monitoring well coordinates and water level data (collected on September 26, 2016) provided by AEP.- Site features based on information available in Ash Pond System-CCR Groundwater Monitoring Well Network Evaluation (Arcadis, 2016) provided by AEP.- Groundwater elevation units are feet above mean sea level (ft amsl).- Water levels from piezometers were inconsistent with other local data and not used to create groundwater contours.- Normal lower pool elevation of the Ohio River at Racine Lock and Dam is 538 ft amsl (USACE).- Intermittent usage of pumping wells for plant activities impact water levels in the vicinity. Water flow in the vicinity is generally in the northeast direction.

1,000 0 1,000500Feet

Ohio River

WV-62Graham Station Road

WastewaterPond (East)

ClearwaterPond

RecirculationPond

WastewaterPond (West)

Bottom AshPond (West)

@A

@A@A

@A

@A

@A@A

!A!A

!A

@A

@A

@A

@A@A@A@A

@A@A

@A@A

@A

MW-001539.72

MW-002540.48

MW-004540.66

MW-005543.8

MW-016540.82

JTMN-1539.85 JTMN-2

539.64

PZ-09-03PZ-09-04

PZ-09-05

MW-1601A544.26

MW-1602544.38

MW-1603543.21

MW-1604S542.11

MW-1604D542.21

MW-1605S542.13MW-1605D542.15

MW-1606S542.89MW-1606D542.83

MW-1607S 543.23MW-1607D543.26

MW-1608541.08

544

543.75

543.5

543.25

543542.75

542.5

542.25

542

541.75

541.5

541.25

541

540.75

540.5

540.25

540

539.75

540



Potentiometric Surface Map - Uppermost AquiferOctober 2016

³





Notes- Monitoring well coordinates and water level data (collected on October 31, 2016) provided by AEP.- Site features based on information available in Ash Pond System-CCR Groundwater Monitoring Well Network Evaluation (Arcadis, 2016) provided by AEP.- Groundwater elevation units are feet above mean sea level (ft amsl).- Water levels from piezometers were inconsistent with other local data and not used to create groundwater contours.- Normal lower pool elevation of the Ohio River at Racine Lock and Dam is 538 ft amsl (USACE).- Intermittent usage of pumping wells for plant activities impact water levels in the vicinity. Water flow in the vicinity is generally in the northeast direction.

1,000 0 1,000500Feet

Ohio River



ClearwaterPond

RecirculationPond



544.25

@A

@A@A

@A

@A

@A@A

!A!A

!A

@A

@A

@A

@A@A@A@A

@A@A

@A@A

@A

MW-004542.35

MW-1604D541.74

MW-1605S 541.65MW-1605D541.69

MW-1606D542.3

MW-1607D542.71

MW-001540.43

MW-002 542.16

MW-005543.76

MW-016540.59

JTMN-1542.57JTMN-2542.49

PZ-09-03PZ-09-04

PZ-09-05

MW-1601A541.69

MW-1602543.66

MW-1603542.59

MW-1604S 541.61

MW-1606S 542.32

MW-1607S 542.66

MW-1608540.92

543

542.75

542.5

542.25

542

541.75

541.5

541.25

541

540.75

540.5

542.5542

541.75541.554

1.25

541

540.7

5

543.5

543.25

543543

.5

543.25

542.25



Potentiometric Surface Map - Uppermost AquiferDecember 2016

³





Notes- Monitoring well coordinates and water level data (collected on December 19, 2016) providedby AEP.- Site features based on information available in Ash Pond System-CCR GroundwaterMonitoring Well Network Evaluation (Arcadis, 2016) provided by AEP.- Groundwater elevation units are feet above mean sea level (ft amsl).- Water levels from piezometers were inconsistent with other local data and not used to creategroundwater contours.- Normal lower pool elevation of the Ohio River at Racine Lock and Dam is 538 ft amsl (USACE).- Intermittent usage of pumping wells for plant activities impact water levels in the vicinity. Waterflow in the vicinity is generally in the northeast direction.

1,000 0 1,000500Feet

Ohio River



ClearwaterPond

RecirculationPond



@A

@A@A

@A

@A

@A@A

!A!A

!A

@A

@A

@A

@A@A@A@A

@A@A

@A@A

@A

MW-001542.43

MW-002543.08

MW-004543.28

MW-005543.66

MW-016541.46

JTMN-1541.91 JTMN-2

541.64

PZ-09-03PZ-09-04

PZ-09-05

MW-1601A543.8

MW-1602543.62

MW-1603542.73

MW-1604S541.92

MW-1604D542.04

MW-1605S541.94MW-1605D542.02

MW-1606S542.54MW-1606D542.52

MW-1607S542.9MW-1607D542.96

MW-1608543.61

543.25

543

542.75

542.5

542.25

542

543.75

543.5

543

542.7

5

542.5

542.25

541.75

543.25

542.75



Potentiometric Surface Map - Uppermost AquiferFebruary 2017

³





Notes- Monitoring well coordinates and water level data (collected on February 20, 2017) providedby AEP.- Site features based on information available in Ash Pond System-CCR GroundwaterMonitoring Well Network Evaluation (Arcadis, 2016) provided by AEP.- Groundwater elevation units are feet above mean sea level.- Water levels from piezometers were inconsistent with other local data and not used to creategroundwater contours.- Normal lower pool elevation of the Ohio River at Racine Lock and Dam is 538 ft amsl (USACE).- Intermittent usage of pumping wells for plant activities impact water levels in the vicinity. Waterflow in the vicinity is generally in the northeast direction.

1,000 0 1,000500Feet

Ohio River



ClearwaterPond

RecirculationPond



542

541.75

@A

@A@A

@A

@A

@A@A

!A!A

!A

@A

@A

@A

@A@A@A@A

@A@A

@A@A

@A

MW-001541.49

MW-002542.09

MW-004542.34

MW-005543.6

MW-016542.22

JTMN-1541.43

JTMN-2541.33

PZ-09-03

PZ-09-04

PZ-09-05

MW-1601A543.99

MW-1602543.75

MW-1603543.02

MW-1604S542.38

MW-1604D542.52

MW-1605S542.43MW-1605D

542.46

MW-1606S542.91

MW-1606D542.87

MW-1607S 543.19

MW-1607D543.24

MW-1608543.89 54

3.5

543.2

5

543

542.75

542.5

542.25

542

541.75

541.5

543.5

543.25

543

542.75

542541.75

543.75



Potentiometric Surface Map - Uppermost AquiferMarch 2017

³





Notes- Monitoring well coordinates and water level data (collected on March 27, 2017) provided by AEP.- Site features based on information available in Ash Pond System-CCR GroundwaterMonitoring Well Network Evaluation (Arcadis, 2016) provided by AEP.- Groundwater elevation units are feet above mean sea level.- Water levels from piezometers were inconsistent with other local data and not used to creategroundwater contours.- Normal lower pool elevation of the Ohio River at Racine Lock and Dam is 538 ft amsl (USACE).- Intermittent usage of pumping wells for plant activities impact water levels in the vicinity. Waterflow in the vicinity is generally in the northeast direction.

1,000 0 1,000500Feet

Ohio River



ClearwaterPond

RecirculationPond



543.7

5

542.5

@A

@A@A

@A

@A

@A@A

!A!A

!A

@A

@A

@A

@A@A@A@A

@A@A

@A@A

@A

MW-001543.14

MW-002543.7

MW-004543.92

MW-005543.2

MW-016543.05

JTMN-1542.92

JTMN-2542.8

PZ-09-03

PZ-09-04

PZ-09-05

MW-1601A544.18

MW-1602544.04

MW-1603543.51

MW-1604S543.05

MW-1604D543.16

MW-1605S543.13

MW-1605D543.16

MW-1606S543.55MW-1606D

543.54

MW-1607S543.87

MW-1607D543.87

MW-1608544.59

544.25

544

543.7

5

543.5

543.2

5

543

544

543.75

543.5

543.5



Potentiometric Surface Map - Uppermost AquiferApril 2017

³





Notes- Monitoring well coordinates and water level data (collected on April 17, 2017) provided byAEP.- Site features based on information available in Ash Pond System-CCR GroundwaterMonitoring Well Network Evaluation (Arcadis, 2016) provided by AEP.- Groundwater elevation units are feet above mean sea level.- Water levels from piezometers and MW-005 were inconsistent with other local data and notused to create groundwater contours.- Normal lower pool elevation of the Ohio River at Racine Lock and Dam is 538 ft amsl (USACE).- Intermittent usage of pumping wells for plant activities impact water levels in the vicinity. Waterflow in the vicinity is generally in the northeast direction.

1,000 0 1,000500Feet

Ohio River



ClearwaterPond

RecirculationPond



544.5

543.25

@A

@A@A

@A

@A

@A@A

!A!A

!A

@A

@A

@A

@A@A@A@A

@A@A

@A@A

@A

MW-001544.36

MW-002545.06

MW-004545.24

MW-005544.56

MW-016543.87

JTMN-1543.98 JTMN-2

544.93

PZ-09-03

PZ-09-04

PZ-09-05

MW-1601A544.74

MW-1602544.63

MW-1603544.35

MW-1604S543.85

MW-1604D543.97

MW-1605S543.93

MW-1605D543.94

MW-1606S544.31MW-1606D544.3

MW-1607S544.53

MW-1607D544.58

MW-1608544.87

544.75544.5

544.25

544

544.75

544.5

544.5544.25

544.5

544.25



Potentiometric Surface Map - Uppermost AquiferMay 2017

³





Notes- Monitoring well coordinates and water level data (collected on May 15, 2017) provided by AEP.- Site features based on information available in Ash Pond System-CCR GroundwaterMonitoring Well Network Evaluation (Arcadis, 2016) provided by AEP.- Groundwater elevation units are feet above mean sea level.- Water levels from piezometers were inconsistent with other local data and not used to creategroundwater contours.- Normal lower pool elevation of the Ohio River at Racine Lock and Dam is 538 ft amsl (USACE).- Intermittent usage of pumping wells for plant activities impact water levels in the vicinity. Waterflow in the vicinity is generally in the northeast direction.

1,000 0 1,000500Feet

Ohio River



ClearwaterPond

RecirculationPond



544.75

545

@A

@A@A

@A

@A

@A@A

!A!A

!A

@A

@A

@A

@A@A@A@A

@A@A

@A@A

@A

MW-001540.9

MW-002541.43

MW-004541.65

MW-005544.54

MW-016543.32

JTMN-1540.62

JTMN-2540.47

PZ-09-03PZ-09-04

PZ-09-05

MW-1601A545.21

MW-1602545.18

MW-1603544.62

MW-1604S543.89

MW-1604D544.01

MW-1605S543.85

MW-1605D543.84

MW-1606S544.3

MW-1606D544.27

MW-1607S544.48MW-1607D

544.54

MW-1608544.01

544.5

544.25

544

543.75

543.5

543.25

543

542.75

542.5

542.25

542

541.75

545

544.75

541.25541

540.75

541.5

543.75



Potentiometric Surface Map - Uppermost AquiferJune 2017

³





Notes- Monitoring well coordinates and water level data (collected on June 12, 2017) provided by AEP.- Site features based on information available in Ash Pond System-CCR GroundwaterMonitoring Well Network Evaluation (Arcadis, 2016) provided by AEP.- Groundwater elevation units are feet above mean sea level.- Water levels from piezometers were inconsistent with other local data and not used to creategroundwater contours.- Normal lower pool elevation of the Ohio River at Racine Lock and Dam is 538 ft amsl (USACE).- Intermittent usage of pumping wells for plant activities impact water levels in the vicinity. Waterflow in the vicinity is generally in the northeast direction.

1,000 0 1,000500Feet

Ohio River



ClearwaterPond

RecirculationPond



@A

@A@A

@A

@A

@A@A

!A!A

!A

@A

@A

@A

@A@A@A@A

@A@A

@A@A

@A

539.75

MW-001539.02

MW-002539.86

MW-004540.09

MW-005543.83

MW-016540.78

JTMN-1539.34 JTMN-2

539.18

PZ-09-03PZ-09-04

PZ-09-05

MW-1601A544.13

MW-1602544.22

MW-1603543.04

MW-1604S542.03

MW-1604D542.12

MW-1605S541.91

MW-1605D542.02

MW-1606S542.68MW-1606D542.65

MW-1607S 542.99

MW-1607D543.07

MW-1608540.92

544

543.75

543.5

543.25

543

542.25

541.75

541.5

541.25

541

540.75

540.5

540.25

540

539.75

539.5

542.75

542

539.25

539.5



Potentiometric Surface Map - Uppermost AquiferOctober 2017

³





Notes- Monitoring well coordinates and water level data (collected on October 30, 2017) provided by AEP.- Site features based on information available in Ash Pond System-CCR Groundwater Monitoring WellNetwork Evaluation (Arcadis, 2016) provided by AEP.- Groundwater elevation units are feet above mean sea level.- Water levels from piezometers were inconsistent with other local data and not used to creategroundwater contours.- Normal lower pool elevation of the Ohio River at Racine Lock and Dam is 538 ft amsl (USACE).- Intermittent usage of pumping wells for plant activities impact water levels in the vicinity. Water flow inthe vicinity is generally in the northeast direction.

1,000 0 1,000500Feet

Ohio River



ClearwaterPond

RecirculationPond



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