Annual Groundwater Monitoring Report - AEP.com · 2/22/2019 · VIII. Other Information Required 6...

Annual Groundwater Monitoring Report

Appalachian Power Company Mountaineer Plant

Bottom Ash Pond CCR Management Unit Letart, WV

January 2019

Prepared by: American Electric Power Service Corporation

1 Riverside Plaza Columbus, Ohio 43215

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Table of Contents

I. Overview 2

II. Groundwater Monitoring Well Locations and Identification Numbers 3

III. Monitoring Wells Installed or Decommissioned 5

IV. Groundwater Quality Data and Static Water Elevation Data, With Flow Rate and Directionand Discussion 5

V. Groundwater Quality Data Statistical Analysis 5

VI. Alternative Source Demonstrations 5

VII. Discussion About Transition Between Monitoring Requirements or Alternate MonitoringFrequency 5

VIII. Other Information Required 6

IX. Description of Any Problems Encountered in 2018 and Actions Taken 6

X. A Projection of Key Activities for the Upcoming Year 6

Appendix 1 – Groundwater Data Tables and Figures

Appendix 2 – Statistical Analyses

Appendix 3 – Alternative Source Demonstrations

Appendix 4 – Notices for Monitoring Program Transitions

Appendix 5 – Well Installation/Decommissioning Logs

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I. OverviewThis Annual Groundwater Monitoring 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 Report be posted to the operating record for the preceding year no later than January 31st.

In general, the following activities were completed in 2018:

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

• Groundwater data underwent various validation tests, including tests for completeness, valid values, transcription errors, and consistent units;

• Statistical analysis of the first detection monitoring sample taken in October 2017 was completed in January 2018;

• An alternative source demonstration (ASD) relative to the Appendix III statistically significant increases (SSIs) was undertaken and completed in April 2018. The ASD was unsuccessful as discussed below;

• Because the ASD was unsuccessful, an assessment monitoring program was established on April 13, 2018;

• As required by the CCR assessment monitoring rules (257.95), two rounds of sampling to include the Appendix III and IV parameters were performed in May and September. Based on the results, Appendix IV groundwater protection standards are being calculated and will be statistically compared to Appendix IV concentrations in downgradient wells. The setting of Appendix IV groundwater protection standards (GWPSs) and statistical analysis will be completed in January 2019.

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;

• 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 1);

• Statistical comparison of monitoring data to determine if there have been significant increase over background concentrations (Attached as Appendix 2, where applicable);

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• A discussion of whether any alternate source demonstrations were performed, and the conclusions (Attached as Appendix 3, where applicable);

• A summary of any transition between monitoring programs, for example the date and circumstances for transitioning from detection monitoring to assessment monitoring (Notice attached as Appendix 4, where applicable);

• Identification of any monitoring wells that were installed or decommissioned during the preceding year, along with a statement as to why that happened (Attached as Appendix 5, where applicable); and

• Other information required to be included in the annual report such as an alternate monitoring frequency, 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.

II. Groundwater Monitoring Well Locations and Identification NumbersThe figure that follows depicts the PE-certified groundwater monitoring network, the monitoringwell locations and their corresponding identification.

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MW-1601A

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MW-1604SMW-1604D

MW-1605SMW-1605D

MW-1606SMW-1606D

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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

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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

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III. Monitoring Wells Installed or DecommissionedThere were no monitoring wells installed or decommissioned in 2018. The network design, assummarized in the Groundwater Monitoring Network Design Report (2016) and as posted at theCCR web site for Mountaineer Plant, did not change. That design report, viewable on the AEPCCR web site, discusses the facility location, the hydrogeological setting, the hydrostratigraphicunits, the uppermost aquifer, downgradient monitoring well locations and the upgradientmonitoring well locations.

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

Appendix 1 contains tables showing the groundwater quality data collected during the establishment of background quality, detection monitoring, and assessment monitoring. Static water elevation data from each monitoring event also are shown in Appendix 1, along with the groundwater velocities, groundwater flow direction and potentiometric maps developed after each sampling event.

V. Groundwater Quality Data Statistical AnalysisStatistical analysis of the first detection monitoring samples taken in October of 2017 was completed in January 2018. Statistically significant increases (SSIs) in the Appendix III parameters of boron, calcium, chloride, fluoride, sulfate and TDS were documented in the statistical analysis summary report, which is available on the CCR Rule Data and Information Website: https://www.aep.com/Assets/docs/requiredpostings/ccr/2018/CCR-Mar2/MT-BAP-AnnGWMonStatRpt-011518.pdf, and available as an attachment in Appendix 2.

VI. Alternative Source DemonstrationsAn alternative source demonstration (ASD) relative to the Appendix III SSIs resulting from the October 2017 sampling was undertaken and completed in April 2018 in an attempt to demonstrate that a source other than the CCR Unit caused the SSIs. The demonstration concluded that an alternative source for the Appendix III parameter SSIs could not be identified at the time. The unsuccessful ASD for Appendix III parameters is attached in Appendix 3.

VII. Discussion About Transition Between Monitoring Requirements or Alternate Monitoring Frequency

Because the ASD for the Appendix III parameters was unsuccessful, the bottom ash pond transitioned into assessment monitoring on April 13, 2018. A notification that the bottom ash pond had established an assessment monitoring program was placed on the CCR Rule Data and Information Website on May 15, 2018. The notice is also available as an attachment in Appendix 4.

https://www.aep.com/Assets/docs/requiredpostings/ccr/2018/CCR-Mar2/MT-BAP-AnnGWMonStatRpt-011518.pdf

https://www.aep.com/Assets/docs/requiredpostings/ccr/2018/CCR-Mar2/MT-BAP-AnnGWMonStatRpt-011518.pdf

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As required by 40 CFR 257.95(b) and 257.95(d)(1), sampling of all bottom ash pond wells for the required Appendix III and/or Appendix IV parameters was completed in May and September 2018. The establishment of groundwater protection standards and the statistical comparison of the Appendix IV parameters will be completed in January 2019.

The bottom ash pond will remain in assessment monitoring unless all Appendix III and IV parameters are below background values for two consecutive monitoring events, at which point, the CCR Unit would return to detection monitoring. If an Appendix IV parameter exceeds its respective groundwater protection standard due to a release from the bottom ash pond, an assessment of corrective measures will be undertaken as required by 40 CFR 257.96.

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 monitoring effort is needed at this time.

VIII. Other Information RequiredThe bottom ash pond has progressed from detection monitoring to its current status in assessment monitoring. All required information has been included in this annual groundwater monitoring report.

IX. Description of Any Problems Encountered in 2018 and Actions TakenNo significant problems were encountered. The low flow sampling effort went smoothly and the schedule was met to support this annual groundwater report preparation.

X. A Projection of Key Activities for the Upcoming YearKey activities for 2019 include:

• Assessment monitoring on a twice per year schedule;

• Evaluation of the assessment monitoring results from a statistical analysis viewpoint, looking for any statistically significant increases over an established groundwater protection standard, or whether the concentrations have returned below background concentrations;

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

• Preparation of the next annual groundwater report.

APPENDIX 1- Groundwater Data Tables and Figures

Tables follow, showing the groundwater monitoring data collected and the rate and direction of groundwater flow. The dates that the samples were collected also is shown.

Groundwater Data Tables

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.

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BackgroundParameter Unit

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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


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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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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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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


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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 – Groundwater Data Summary Mountaineer – Bottom Ash Pond

Geosyntec Consultants, Inc.

5/10/2018 9/20/2018 5/10/2018 9/20/2018 5/10/2018 9/20/2018 1/22/2018 5/9/2018 9/19/2018 1/22/2018 5/9/2018 9/19/2018 2017-D1-V1 2017-D1-V1

Antimony µg/L 0.0300 J 0.0300 J 0.0200 J 0.0100 J 0.0200 J 0.0200 J - 0.0400 J 0.0400 J - 0.130 0.130Arsenic µg/L 0.550 0.580 0.340 0.320 0.310 0.260 - 0.340 0.290 - 0.330 0.320Barium µg/L 63.9 55.3 31.2 26.7 41.3 35.9 - 32.0 37.0 - 28.7 26.6

Beryllium µg/L <0.004 U <0.004 U 0.00500 J <0.004 U 0.00700 J <0.004 U - <0.004 U <0.004 U - 0.0240 <0.004 UBoron mg/L - 0.251 - 0.109 - 0.324 3.07 - 1.33 2.36 - 2.49

Cadmium µg/L 0.0200 J 0.0200 J 0.0100 J 0.0100 J 0.0100 J 0.0100 J - 0.0400 0.0300 - 0.150 0.150Calcium mg/L - 148 - 81.6 - 167 291 - 144 - - 262Chloride mg/L - 51.0 - 10.5 - 14.0 118 - 41.3 105 - 109

Chromium µg/L 0.153 0.131 0.121 0.210 0.0990 0.102 - 0.195 0.169 - 0.107 0.0930Cobalt µg/L 0.0830 0.0590 0.0360 0.0200 J 0.0540 0.0320 - 0.314 0.203 - 1.83 1.88

Combined Radium pCi/L 0.767 0.696 0.342 0.683 0.363 0.881 - 0.687 0.316 - 1.17 1.16Fluoride mg/L 0.160 0.190 0.230 0.250 0.0900 J 0.0900 - 0.210 0.190 - 0.220 0.220

Lead µg/L 0.0340 0.00500 J 0.0380 0.0100 J 0.0420 0.0200 J - 0.0350 0.303 - 0.0340 0.0200 JLithium mg/L 0.00400 0.00400 0.0150 0.0120 0.0210 0.0220 - 0.0240 0.0160 - 0.0510 0.0520Mercury µg/L <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U <0.002 U - <0.002 U <0.002 U - <0.002 U <0.002 U

Molybdenum µg/L 0.990 0.760 0.710 0.840 0.140 0.0700 J - 2.05 1.57 - 16.2 15.6Selenium µg/L 1.50 1.10 0.100 0.0700 J 0.200 0.400 - 1.40 3.80 - 1.00 0.800

Total Dissolved Solids mg/L - 638 - 502 - 920 1620 - 838 1312 - 1500Sulfate mg/L - 189 - 195 - 524 862 - 313 602 - 742

Thallium µg/L 0.0300 J 0.0400 J 0.0300 J 0.0200 J 0.0200 J 0.0100 J - 0.0200 J 0.0200 J - 0.220 0.251pH SU 7.30 7.14 7.01 7.14 6.55 6.58 7.2 7.09 7.21 6.90 7.43 7.30

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 limitJ: Estimated value. Parameter was detected in concentrations below the reporting limit-: Not sampled2017-D1-V1: Verification sampling for initial detection monitoring event (initial detection event occurred in 2017, the verification sampling for that event occurred in 2018)2018-AM: Assessment monitoring event in 2018

UnitParameter MW-1603MW-1602 MW-1604SMW-1604D

2018-AM 2018-AM 2018-AM 2018-AM

MW-1601A

2018-AM











Thallium µg/LpH SU

UnitParameter1/22/2018 5/9/2018 9/19/2018 1/22/2018 5/9/2018 9/19/2018 1/23/2018 5/9/2018 9/19/2018 1/23/2018 5/9/2018 9/19/2018

2017-D1-V1 2017-D1-V1 2017-D1-V1 2017-D1-V1- 0.0300 J 0.0400 J - 0.0400 J 0.0400 J - 0.160 0.150 - 0.140 0.130- 2.22 2.51 - 0.500 0.490 - 0.440 0.380 - 0.720 0.690- 21.6 25.9 - 23.5 23.1 - 53.0 48.9 - 73.2 64.8- <0.004 U <0.004 U - <0.004 U <0.004 U - <0.004 U 0.00400 J - <0.004 U 0.00500 J

9.33 - 9.11 10.1 - 7.75 9.59 - 7.27 6.62 - 5.87- 0.0100 J 0.0200 J - 0.0600 0.0500 - 0.0700 0.0700 - 0.0800 0.0600

321 - 278 231 - 182 322 - 260 218 - 199197 - 188 220 - 171 327 - 201 184 - 219

- 0.0670 0.229 - 0.0830 0.644 - 0.198 0.151 - 0.0560 0.297- 1.51 1.80 - 0.518 0.360 - 1.40 1.17 - 0.318 0.260- 0.523 0.759 - 0.305 0.347 - 0.972 0.438 - 0.344 0.439- 0.230 0.220 - 0.300 0.320 - 0.260 0.260 0.43 0.440 0.460- 0.0200 J 0.0100 J - 0.0560 0.0930 - 0.115 0.0100 J - 0.0400 0.0200 J- 0.0620 0.0600 - 0.0510 0.0490 - 0.112 0.107 - 0.107 0.0960- <0.002 U <0.002 U - <0.002 U <0.002 U - <0.002 U <0.002 U - <0.002 U <0.002 U- 46.4 47.9 - 15.6 15.1 - 70.3 65.3 - 70.2 70.6- 0.200 0.300 - 2.00 1.00 - 2.60 3.30 - 2.00 2.80

2060 - 1960 1970 - 1650 1730 - 1610 1450 - 13701070 - 972 976 - 793 760 - 722 660 - 571

- 0.0400 J 0.0500 J - 0.0400 J 0.0400 J - 0.0860 0.108 - 0.0760 0.1127..2 7.46 7.57 7.10 7.21 7.35 7.40 7.43 7.19 7.20 6.93 7.10


MW-1606SMW-1606DMW-1605SMW-1605D

2018-AM 2018-AM 2018-AM 2018-AM











Thallium µg/LpH SU

UnitParameter1/23/2018 5/10/2018 9/20/2018 1/23/2018 5/10/2018 9/20/2018 5/10/2018 9/20/2018

2017-D1-V1 2017-D1-V1- 0.0300 J 0.0300 J - 0.440 0.420 0.0200 J 0.0300 J- 1.15 1.34 - 0.930 0.900 0.370 0.420- 73.5 92.3 - 71.1 80.6 46.6 42.6- <0.004 U <0.004 U - <0.004 U <0.004 U 0.00900 J <0.004 U

2.34 - 2.44 1.49 - 1.71 - 0.169- <0.005 U <0.005 U - 0.0400 0.0400 0.0100 J 0.00800 J

244 - 222 - - 220 - 128150 - 163 111 - 151 - 6.59

- 0.0510 0.158 - 0.121 0.0860 0.126 0.264- 0.521 0.769 - 1.18 0.840 0.0950 0.0520- 1.25 0.926 - 1.29 0.584 0.565 0.550

0.44 0.540 0.520 - 0.290 0.280 0.180 0.210- 0.0430 0.0440 - 0.128 0.0940 0.0790 0.0370- 0.0890 0.104 - 0.103 0.118 0.000300 J 0.00400- <0.002 U <0.002 U - <0.002 U <0.002 U <0.002 U <0.002 U- 80.9 83.4 - 43.2 41.5 0.530 1.18- <0.03 U <0.03 U - 11.4 8.80 0.900 1.20

1380 - 1450 - - 1160 - 572668 - 662 - - 478 - 256

- 0.0200 J 0.0400 J - 0.0640 0.0890 0.0200 J 0.0200 J7.50 7.54 7.73 7.40 7.40 7.57 6.78 7.17


MW-1608MW-1607SMW-1607D

2018-AM 2018-AM

Groundwater Flow Direction Maps

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539.75MW-001545.31

MW-002545.59

MW-004545.87

MW-005545.42

MW-016545.30

JTMN-1544.45

JTMN-2544.24

PZ-09-03604.07

PZ-09-04

PZ-09-05561.61

MW-1601A545.74

MW-1602545.59

MW-1603545.31

MW-1604S544.77

MW-1604D544.97

MW-1605S544.90

MW-1605D544.84

MW-1606S545.17

MW-1606D545.12

MW-1607S545.36

MW-1607D545.44

MW-1608548.66

545.5

545.25

545

544.75

545.5

545.25

544.5

545.25

545.2545.25

\\annarbor-01\data\Projects\AEP\Groundwater Statistical Evaluation - CHA8423\Groundwater Mapping\GIS Files\MXD\Mountaineer\2018\AEP-Mountaineer_BAP_GW_2018-05.mxd. ARevezzo. 9/17/2018. CHA8423/07/08.

AEP Mountaineer Generating Plant - Bottom Ash PondsNew Haven, West Virginia

Potentiometric Surface Map - Uppermost AquiferMay 2018

³


Bottom AshPond (East)

Legend@A Monitoring Well!A Piezometer

Approximate Groundwater Flow DirectionGroundwater Elevation ContourGroundwater Elevation Countour (Inferred)

Notes- Monitoring well coordinates and water level data (collected on May 2, 2018) 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 539.5 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

WV-62Graham Station Road

WastewaterPond (East)

ClearwaterPond

RecirculationPond

WastewaterPond (West)

Bottom AshPond (West)

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MW-002545.09

MW-004545.38

MW-005545.84

MW-016543.13

JTMN-1544.53

JTMN-2544.39

PZ-09-03603.6

PZ-09-04572.28

PZ-09-05561.64

MW-1601A546.75

MW-1602546.85

MW-1603545.67

MW-1604S544.44

MW-1604D544.64

MW-1605S544.53

MW-1605D544.57

MW-1606S545.34

MW-1606D545.31

MW-1607S545.76

MW-1607D545.83

MW-1608543.83

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546.25

546

545.75

545.5

545.25

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544.25

544

543.75

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543.5

543.25

544.5

544

546.75

544

P:\Projects\AEP\Groundwater Statistical Evaluation - CHA8423\Groundwater Mapping\GIS Files\MXD\Mountaineer\2018\AEP-Mountaineer_BAP_GW_2018-09.mxd. ARevezzo. 1/17/2019. CHA8423/07/08.

AEP Mountaineer Generating Plant - Bottom Ash PondsNew Haven, West Virginia

Potentiometric Surface Map - Uppermost AquiferSeptember 2018

³


Bottom AshPond (East)

Legend@A Monitoring Well!A Piezometer

Approximate Groundwater Flow DirectionGroundwater Elevation ContourGroundwater Elevation Countour (Inferred)

Notes- Monitoring well coordinates and water level data (collected on September 18, 2018) 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 539.5 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

WV-62Graham Station Road

WastewaterPond (East)

ClearwaterPond

RecirculationPond

WastewaterPond (West)

Bottom AshPond (West)

Groundwater Flow Velocity Calculations

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


CCRManagement

Unit

MonitoringWell

Well Diameter (inches)

Groundwater Velocity (ft/year)

Groundwater Residence

Time (days)

Groundwater Velocity (ft/year)

Groundwater Residence

Time (days)

MW-1601A [1] 2.0 47.4 1.3 76.2 0.8MW-1602 [1] 2.0 34.5 1.8 146.3 0.4MW-1603 [1] 2.0 663.8 0.1 360.2 0.2

MW-1604D [2] 2.0 19.0 3.2 485.0 0.1MW-1604S [2] 2.0 145.3 0.4 236.3 0.3MW-1605D [2] 2.0 120.7 0.5 273.6 0.2MW-1605S [2] 2.0 75.4 0.8 334.4 0.2MW-1606D [2] 2.0 168.8 0.4 204.3 0.3MW-1606S [2] 2.0 220.7 0.3 306.4 0.2MW-1607D [2] 2.0 114.9 0.5 244.8 0.2MW-1607S [2] 2.0 51.7 1.2 192.9 0.3MW-1608 [1] 2.0 484.2 0.1 35.5 1.7

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

2018-05 2018-09

Bottom AshPond

APPENDIX 2 - Statistical Analyses

The memorandum summarizing the statistical evaluation follows.

Purpose of Statistical Analysis Summary Report

During the initial phase of ground water monitoring, the CCR rule requires AEP to collect at

least eight independent samples from at least one up-gradient and three downgradient wells for

21 substances listed in the CCR rule. The CCR rule also requires us to select a statistical method

that will be used to evaluate the samples in the later phases of the ground water monitoring

program. The Statistical Plan, which has been posted to AEP’s CCR website, describes the

methods selected by AEP. See AEP’s Statistical Analysis Plans.

Each Statistical Analysis Summary Report is based on the results of the 8 independent samples

that were collected by October 17, 2017, and reported in the Annual Groundwater Monitoring

Report. Using the statistical methods chosen by AEP, the samples were evaluated to eliminate

outliers, determine variability and general trends in the data, and establish background values

for: boron, calcium chloride, fluoride, pH, sulfate, and total dissolved solids. Appendix IV

substances were evaluated for purposes of identifying outliers and understanding data trends.

A subsequent sample taken during the first detection monitoring sampling event was also

compared using the proper statistical methods to the background values that were established for

these seven substances from the eight independent samples. A second or third re-sampling

event occurred, and the results compared using the same methods. This work is reported in the

memorandum included in attachment A. If confirmed, AEP will be required to enter the next

phase of monitoring. The results of future sampling will be further analyzed to target any

specific substances for which ongoing monitoring or potential corrective action is required.

STATISTICAL ANALYSIS SUMMARY

BOTTOM ASH POND

Mountaineer Plant

New Haven, West Virginia

Submitted to

1 Riverside Plaza

Columbus, Ohio 43215-2372

Submitted by

150 East Wilson Bridge Road

Suite 232

Worthington, Ohio 43085

January 15, 2018

CHA8423

Statistical Analysis

January 15, 2018

2017 CHA8423 20180115 Mountaineer BAP Report i

TABLE OF CONTENTS

SECTION 1 Executive Summary ............................................................................... ES-1

SECTION 2 Bottom Ash Ponds Evaluation .................................................................. 2-1

2.1 Data Validation & QA/QC ....................................................................... 2-1

2.2 Statistical Analysis .................................................................................... 2-1

2.2.1 Background Outlier Evaluation ................................................... 2-2

2.2.2 Establishment of Background Levels .......................................... 2-3

2.2.3 Certification by Qualified Professional Engineer ........................ 2-5

2.3 Conclusions ............................................................................................... 2-6

SECTION 3 References ................................................................................................. 3-1


January 15, 2018

2017 CHA8423 20180115 Mountaineer BAP Report ii

LIST OF TABLES

Table 1 Groundwater Data Summary

Table 2 Outlier Analysis Summary

Table 3 Background Level Summary

LIST OF ATTACHMENTS

Attachment A Evaluation of Detection Monitoring Data

Attachment B Statistical Analysis Output


January 15, 2018

2017 CHA8423 20180115 Mountaineer BAP Report iii

LIST OF ACRONYMS AND ABBREVIATIONS

AEP American Electric Power

ANOVA Analysis of Variance

BAPs Bottom Ash Ponds

CCR Coal Combustion Residuals

CCV Continuing Calibration Value

CFR Code of Federal Regulations

EPA Environmental Protection Agency

LFB Laboratory Fortified Blanks

LPL Lower Prediction Limit

LRB Laboratory Reagent Blanks

NELAP National Environmental Laboratory Accreditation Program

PQL Practical Quantitation Limit

QA Quality Assurance

QC Quality Control

SSI Statistically Significant Increase

SWFPR Site-Wide False-Positive Rate

TDS Total Dissolved Solids

UPL Upper Prediction Limit

USEPA United States Environmental Protection Agency


January 15, 2018

2017 CHA8423 20180115 Mountaineer BAP Report ES-1

SECTION 1

EXECUTIVE SUMMARY

In accordance with the United States Environmental Protection Agency’s (USEPA’s) regulations

regarding the disposal of coal combustion residuals (CCR) in landfills and surface impoundments

(40 CFR 257.90-257.98, “CCR rule”), groundwater monitoring has been conducted at the Bottom

Ash Ponds (BAPs), an existing CCR unit at the Mountaineer Power Plant located in New Haven,

West Virginia.

Eight monitoring events were completed prior to October 17, 2017 to establish background

concentrations for Appendix III and Appendix IV parameters under the CCR rule. Groundwater

data underwent several validation tests, including those for completeness, sample tracking

accuracy, transcription errors, and consistent use of measurement units. No data quality issues

were identified which would impact the usability of the data.

The monitoring data were submitted to Groundwater Stats Consulting, LLC for statistical analysis.

The background data were reviewed for outliers, which were removed (when appropriate) prior to

calculating upper prediction limits (UPLs) for each Appendix III parameter to represent

background values. Oversight on the use of statistical calculations was provided by Dr. Kirk

Cameron of MacStat Consulting, Ltd.

A detection monitoring event was completed on October 30 and 31, 2017 at the BAPs. The results

of this detection monitoring event are included in this report.


January 15, 2018

2017 CHA8423 20180115 Mountaineer BAP Report 2-1

SECTION 2

BOTTOM ASH PONDS EVALUATION

2.1 Data Validation & QA/QC

During the background monitoring program, eight sets of samples were collected for analysis from

each background and compliance well. A summary of data collected during background and

detection monitoring sampling may be found in Table 1.

Chemical analysis was completed by an analytical laboratory certified by the National

Environmental Laboratory Accreditation Program (NELAP). Quality assurance and quality

control (QA/QC) samples completed by the analytical laboratory included the use of laboratory

reagent blanks (LRBs), continuing calibration verification (CCV) samples, and laboratory fortified

blanks (LFBs).

The analytical data were imported into a Microsoft Access database, where checks were completed

to assess the accuracy of sample location identification and analyte identification. Where

necessary, unit conversions were applied to standardize reported units across all sampling events.

Exported data files were created for use with the Sanitas™ v.9.5.32 statistics software. The export

was checked against the analytical data for transcription errors and completeness. No QA/QC

issues were noted which would impact data usability.

2.2 Statistical Analysis

The background data used to conduct the statistical analyses and the detection monitoring data are

summarized in Table 1. Statistical analyses for the BAPs were conducted in accordance with the

January 2017 Statistical Analysis Plan (AEP, 2017), except where noted below. Results for all

completed statistical tests are provided in Attachment A.

Time series plots of Appendix III and IV parameters are included in Attachment A. Mann-Kendall

analyses (α = 0.01) were conducted to evaluate trends in the background data. The following

statistically significant trends were observed:

• Barium was found to be significantly decreasing at compliance well MW-1605S.

• Cadmium was found to be significantly decreasing at background well MW-1608.

• Calcium was found to be significantly increasing at background well MW-1603 and at

compliance well MW-1607S.

• Chloride was found to be significantly increasing at background well MW-1601A and at

compliance well MW-1605S.


January 15, 2018


• Chromium was found to be significantly decreasing at background well MW-1601A.

• Cobalt was found to be significantly decreasing at background well MW-1608.

• Fluoride was found to be significantly decreasing at background well MW-1608.

• Lead was found to be significantly decreasing at background well MW-1608 and at

compliance well MW-1605D.

• Lithium was found to be significantly increasing at compliance well MW-1607D.

• Sulfate was found to be significantly increasing at background wells MW-1601A and

MW-1602.

• Total dissolved solids (TDS) was found to be significantly increasing at background well

MW-1602 and significantly decreasing at compliance well MW-1605D.

No other significant increasing or decreasing trends were observed for other parameters or at other

monitoring wells.

2.2.1 Background Outlier Evaluation

Potential outliers were identified using Tukey’s outlier test; i.e., data points were considered

potential outliers if they met one of the following criteria:

𝑥𝑖 < �̃�0.25 − 3 × 𝐼𝑄𝑅 (1)

or

𝑥𝑖 > �̃�0.75 + 3 × 𝐼𝑄𝑅 (2)

where:

𝑥𝑖 = individual data point

�̃�0.25 = first quartile

�̃�0.75 = third quartile

𝐼𝑄𝑅 = the interquartile range = �̃�0.75 − �̃�0.25

Background well data were first pooled, and Tukey’s outlier test was performed on the pooled

dataset. For the compliance wells, Tukey’s outlier test was applied individually to each

compliance well.

Data that were evaluated as potential outliers are summarized in Attachment A. Tukey’s outlier

test indicated twelve potential outliers, which are summarized in Table 2. Next, the data were

reviewed to identify possible sources of errors or discrepancies, including data recording errors,


January 15, 2018


unusual sampling conditions, laboratory quality, or inconsistent sample turbidity. The findings of

this data review are summarized below.

The reported arsenic, barium, mercury, and thallium concentrations for the December 21, 2016

sample at compliance well MW-1607D were all identified as potential outliers. The identification

of multiple outliers for one sampling indicates possible sampling error, and these values were

removed from the dataset.

The reported combined radium concentration of 0.136 pCi/L and the molybdenum concentration

of 0.0032 mg/L for the September 26, 2016 sample collected at compliance well MW-1604S were

both identified as potential outliers. Both values were removed from the dataset as outliers. Their

removal did not affect the calculation of background levels presented below.

The TDS concentration of 3,230 mg/L for the May 16, 2017 sampling event at compliance well

MW-1606S was removed from the dataset as an outlier per USEPA’s Unified Guidance (USEPA,

2009), with the its removal resulting in the generation of more conservative (i.e., lower)

background values, should intrawell tests be used.

The reported chloride concentrations of 88.3 mg/L and 118 mg/L for the September 27, 2016 and

December 20, 2016 sampling event at compliance well MW-1607D were both identified as

potential outliers. However, these values were not removed from the dataset as these values were

only slightly outside the Tukey’s test cutoffs and these values were similar to neighboring wells.

The sample collected at compliance well MW-1607D on September 27, 2016 had a recorded pH

of 6.90, which was identified as a potential outlier. This value was not removed from the dataset,

as it was similar to values at neighboring wells. The recorded pH values of 8.23 and 8.41 at

MW-1607S and MW-1607D, respectively, during the May 16, 2017 sampling were both identified

as potential outliers. These wells were sampled sequentially, suggesting possible instrumentation

error, and the values were removed from the dataset. The removal of these pH values resulted in

the generation of more conservative (i.e., lower) background values.

2.2.2 Establishment of Background Levels

Analysis of variance (ANOVA) was conducted to determine whether spatial variation was present

among the four background wells (Attachment A). Significant variation was observed for all

Appendix III parameters. Therefore, the appropriateness of using intrawell tests was evaluated for

these parameters at the Mountaineer BAPs.

Intrawell tests presume that the groundwater quality in the compliance wells was not initially

impacted by the CCR unit. To test this presumption, the data from the background wells were

pooled, and the data from each compliance well were compared to a pooled background value.

Parametric tolerance limits with 99% confidence and 95% coverage were calculated using the

pooled background data for each Appendix III parameter. Confidence intervals were calculated

for each Appendix III parameter at each compliance monitoring well. If the lower confidence limit


January 15, 2018


from a compliance well exceeded the upper tolerance limit for the pooled background data, it was

concluded that groundwater concentrations at compliance wells were above background

concentrations. In these instances, intrawell tests would not be appropriate. However, these

analyses indicated no significant exceedances for pH; elevated concentrations of boron, calcium,

chloride, fluoride, sulfate, and TDS were observed. (Non-parametric analyses also indicated no

significant exceedances for pH, and elevated concentrations of boron, calcium, chloride, fluoride,

sulfate, and TDS in compliance wells.) Therefore, parametric intrawell tests were used to evaluate

potential statistically significant increases (SSIs) for pH. Parametric interwell tests were used to

evaluate potential SSIs for boron, calcium, chloride, fluoride, sulfate, and TDS.

After equality of variance was tested and identified outliers were removed (where appropriate), a

parametric or non-parametric analysis was selected based on the distribution of the data and the

frequency of non-detect data. Estimated results less than the practical quantitation limit (PQL) –

i.e., “J-flagged” data – were considered detections and the estimated results were used in the

statistical analyses. Non-parametric analyses were selected for datasets with at least 50% non-

detect data or datasets that could not be normalized. Parametric analyses were selected for datasets

(either transformed or untransformed) that passed the Shapiro-Wilk / Shapiro-Francía test for

normality. The Kaplan-Meier non-detect adjustment was applied to datasets with between 15%

and 50% non-detect data. For datasets with fewer than 15% non-detect data, non-detect data were

replaced with one half of the PQL. The selected analysis (i.e., parametric or non-parametric) and

transformation (where applicable) for each background dataset are shown in Attachment A.

Upper prediction limits (UPLs) were calculated for each Appendix III parameter to represent

background values. A lower prediction limit (LPL) was also calculated for pH. To conduct the

intrawell tests for pH, a separate UPL and LPL were calculated for each compliance well. To

conduct the interwell tests for boron, calcium, chloride, fluoride, sulfate, and TDS, a single

prediction interval was calculated for each of these parameters using pooled data from the four

background wells. The background data used for the UPL calculations are summarized in Table

1; the calculated UPLs are summarized in Table 3.

Although significant trends were observed at background wells for calcium, chloride, fluoride,

sulfate, and TDS, the UPLs were calculated as if no trend were present; i.e., the background well

data were pooled and were not limited to more recent data. This was done because the magnitudes

of the trends are generally low relative to absolute concentrations, with the exception of increasing

chloride concentrations at MW-1601A. However, in this instance, the chloride concentrations

observed at MW-1601A are similar to chloride concentrations observed at other background wells.

The possibility of ongoing trends and the need for truncating the datasets at background wells will

be reevaluated after additional data are collected.

Calcium and chloride were found to be significantly increasing at compliance wells MW-1607S

and MW-1605S, respectively. However, in both cases, the magnitudes of the increasing trends are

low relative to the absolute concentrations at these wells, and concentrations are within the ranges

of concentrations observed at background wells. Increasing trends are also observed for calcium


January 15, 2018


2.3 Conclusions

Eight background monitoring events and one detection monitoring event were completed in

accordance with the CCR Rule. The laboratory and field data were reviewed prior to statistical

analysis, with no QA/QC issues identified that impacted data usability. A review of outliers

identified twelve potential outliers, with nine values removed from the dataset without

replacement. Prediction intervals were constructed based on the remaining background data and

a one-of-two retesting procedure. Interwell tests were selected for boron, calcium, chloride,

fluoride, sulfate, and TDS, whereas intrawell tests were selected for pH.


January 15, 2018


SECTION 3

REFERENCES

American Electric Power (AEP). 2017. Statistical Analysis Plan – Mountaineer Plant. January

2017.

United States Environmental Protection Agency (USEPA). 2009. Statistical Analysis of

Groundwater Monitoring Data at RCRA Facilities – Unified Guidance. EPA 530/R-09-007. March

2009.

TABLES

Table 1: Groundwater Data Summary

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

Detection Detection

Antimony µg/L 0.05 0.05J 0.05J 0.03J 0.03J 0.03J 0.04J 0.04J 0.02J 0.02J 0.02J 0.05U 0.01J 0.02J 0.02J 0.03J

Arsenic µg/L 0.62 0.61 0.65 0.55 0.49 0.59 0.79 0.61 0.4 0.35 0.43 0.35 0.34 0.36 0.42 0.36

Barium µg/L 46.6 45.2 47 41.4 40.2 47.5 56.9 49 27.1 28.7 28.9 26.9 29.9 32.1 33.2 33.1

Beryllium µg/L 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U

Boron mg/L 0.211 0.17 0.196 0.253 0.515 0.259 0.224 0.285 0.224 0.141 0.115 0.12 0.093 0.24 0.107 0.115 0.153 0.093

Cadmium µg/L 0.01J 0.02J 0.02J 0.02J 0.01J 0.01J 0.02J 0.02J 0.02J 0.02J 0.01J 0.01J 0.02J 0.01J 0.02J 0.01J

Calcium mg/L 141 122 130 117 119 130 159 138 137 74.9 71.1 74.7 69.6 86.6 91.1 105 94 78.1

Chloride mg/L 21.8 17.3 20.4 31 42.1 55.3 74.4 57.7 49.4 7.95 8.7 9.91 9.76 12 12.1 12.6 11.8 8.41

Chromium µg/L 0.3 1.3 0.806 0.198 0.225 0.17 0.166 0.152 0.2 0.6 1.65 0.194 0.456 0.24 0.136 0.408

Cobalt µg/L 0.116 0.086 0.282 0.132 0.097 0.093 0.154 0.098 0.217 0.108 0.225 0.052 0.059 0.049 0.072 0.066

Combined Radium pCi/L 0.43758 2.011 1.544 0.313 0.495 0.814 1.279 0.599 0.275 2.086 0.7053 0.75 0.679 0.337 1.9116 0.2898

Fluoride mg/L 0.17 0.19 0.18 0.2 0.19 0.19 0.18 0.18 0.19 0.17 0.18 0.18 0.19 0.19 0.2 0.19 0.2 0.23

Lead µg/L 0.132 0.108 0.383 0.139 0.069 0.052 0.141 0.063 0.255 0.07 0.272 0.052 0.063 0.087 0.078 0.061

Lithium mg/L 0.002 0.001 0.001U 0.005 0.006 0.007 0.001U 0.004 0.013 0.014 0.008 0.013 0.019 0.017 0.009 0.018

Mercury µg/L 0.005U 0.005U 0.005U 0.005U 0.005U 0.003J 0.005U 0.005U 0.005U 0.005U 0.005U 0.005U 0.005U 0.002J 0.005U 0.005U

Molybdenum µg/L 2.61 2.36 0.93 1.42 2.85 1.53 2.04 1.13 0.9 1.48 0.56 0.63 1.49 0.66 1.28 0.53

Selenium µg/L 1.3 1.1 1.1 1.4 1 1.5 1.3 1.5 0.08J 0.1 0.08J 0.1 0.2 0.1 0.1 0.1

Total Dissolved Solids mg/L 538 534 544 568 530 580 676 586 564 412 424 470 494 504 520 598 588 468

Sulfate mg/L 130 136 141 135 148 169 197 170 169 167 178 188 193 231 248 273 269 184

Thallium µg/L 0.053 0.058 0.04J 0.07 0.03J 0.04J 0.04J 0.04J 0.092 0.116 0.02J 0.02J 0.01J 0.01J 0.04J 0.02J

pH SU 7.55 7.22 7.2 7.16 7.06 7.13 7.71 6.91 7.06 7.26 6.59 6.93 6.53 6.28 6.66 7.04 6.75 6.67

Notes:

mg/L: milligrams per liter

µg/L: micrograms per liter

pCi/L: picocuries per liter

SU: standard unit

U: Component was not present in concentrations above method detection limit and is reported as the reporting limit

J: Estimated value. Component was detected in concentrations below the reporting limit

-: Not sampled

Parameter Unit

Background Background

MW-1601A MW-1602




Antimony µg/L

Arsenic µg/L

Barium µg/L

Beryllium µg/L

Boron mg/L

Cadmium µg/L

Calcium mg/L

Chloride mg/L

Chromium µg/L

Cobalt µg/L

Combined Radium pCi/L

Fluoride mg/L

Lead µg/L

Lithium mg/L

Mercury µg/L

Molybdenum µg/L

Selenium µg/L

Total Dissolved Solids mg/L

Sulfate mg/L

Thallium µg/L

pH SU

Parameter Unit 9/28/2016 11/2/2016 12/19/2016 2/20/2017 3/28/2017 4/17/2017 5/15/2017 6/12/2017 10/30/2017 9/26/2016 11/1/2016 12/20/2016 2/21/2017 3/28/2017 4/19/2017 5/16/2017 6/13/2017 10/30/2017

Detection Detection

0.02J 0.02J 0.03J 0.01J 0.02J 0.03J 0.03J 0.03J 0.14 0.15 0.14 0.11 0.13 0.12 0.13 0.15

0.36 0.36 0.4 0.37 0.36 0.52 0.43 0.35 0.48 0.59 0.57 0.45 0.41 0.49 0.54 0.46

29.5 34.1 33.1 31.7 32.9 33.7 33 32 29.1 28.4 30.3 26.2 28.9 27.9 27.5 27.9

0.02U 0.02U 0.02U 0.02U 0.02U 0.005J 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.04U

0.327 0.334 0.495 0.543 0.781 0.519 0.546 0.535 0.36 3.54 2.98 3.07 3.01 4.18 2.97 2.95 2.98 2.6

0.02J 0.01J 0.01J 0.01J 0.01J 0.01J 0.01J 0.01J 0.14 0.17 0.17 0.13 0.13 0.09 0.1 0.15

124 146 164 169 181 170 187 176 171 306 277 289 260 293 269 300 283 295

15.7 22.8 30.1 27.4 25.2 22.9 24.7 20.5 13.1 111 116 118 111 112 109 112 118 116

0.3 0.4 2.37 0.229 0.545 0.304 0.415 0.963 0.4 0.5 0.798 0.297 0.416 0.323 0.079 0.18

0.317 0.166 0.134 0.105 0.093 0.377 0.101 0.085 1.76 1.78 1.92 1.85 1.74 1.6 1.6 1.95

0.0927 2.593 0.966 0.384 0.2071 0.6154 1.6052 0.776 1.38 1.056 1.45 0.824 0.806 1.537 3.489 1.058

0.07J 0.08J 0.1J 0.1J 0.1J 0.1J 0.1J 0.1J 0.1 0.18 0.19 0.17 0.21 0.19 0.2 0.18 0.18 0.2

0.253 0.131 0.084 0.077 0.08 0.308 0.079 0.059 0.106 0.039 0.02J 0.02J 0.022 0.584 0.027 0.03J

0.021 0.022 0.01 0.012 0.02 0.018 0.012 0.021 0.059 0.057 0.045 0.05 0.064 0.051 0.052 0.058

0.005U 0.005U 0.005U 0.005U 0.005U 0.003J 0.005U 0.005U 0.005U 0.036 0.005U 0.005U 0.005U 0.003J 0.005U 0.005U

1.21 2.47 0.36 0.37 0.72 0.27 0.71 0.29 19.8 20 20.8 17.4 18.2 17.4 18.1 18.3

0.1 0.4 0.3 0.4 0.2 0.2 0.1 0.1 0.9 1 1 0.7 0.7 0.7 0.5 0.8

618 814 908 962 918 910 910 878 872 1650 1580 1630 1640 1660 1570 1610 1620 1570

388 483 504 485 476 474 470 482 553 865 866 863 823 814 797 828 856 833

0.02J 0.04J 0.063 0.02J 0.05U 0.01J 0.02J 0.01J 0.235 0.261 0.283 0.264 0.336 0.217 0.231 0.256

7.27 6.56 7.41 6.78 6.6 6.93 7.38 6.95 6.58 7.28 7.3 7.41 7.2 7.16 7.19 7.87 7.52 7.21

Notes:




SU: standard unit



-: Not sampled


MW-1603 MW-1604D




Antimony µg/L

Arsenic µg/L

Barium µg/L

Beryllium µg/L

Boron mg/L

Cadmium µg/L

Calcium mg/L

Chloride mg/L

Chromium µg/L

Cobalt µg/L


Fluoride mg/L

Lead µg/L

Lithium mg/L

Mercury µg/L

Molybdenum µg/L

Selenium µg/L


Sulfate mg/L

Thallium µg/L

pH SU

Parameter Unit 9/26/2016 11/1/2016 12/20/2016 2/21/2017 3/28/2017 4/19/2017 5/16/2017 6/13/2017 10/30/2017 9/27/2016 11/2/2016 12/20/2016 2/21/2017 3/28/2017 4/18/2017 5/16/2017 6/13/2017 10/31/2017

Detection Detection

0.04J 0.04J 0.04J 0.03J 0.03J 0.03J 0.04J 0.03J 0.03J 0.03J 0.03J 0.04J 0.04J 0.03J 0.03J 0.04J

0.39 0.46 0.42 0.42 0.37 0.44 0.51 0.41 2.29 2.48 2.26 2.23 2.01 2.25 2.45 1.99

29.4 27.2 26.6 26.7 31.6 28.9 32.2 28.7 31.5 30.6 28.2 25.9 27.9 25.8 26.3 27.2

0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.04U 0.04U 0.04U 0.02U 0.02U 0.04U 0.02U 0.04U

2.12 1.9 2.35 3.08 4.04 3.68 3.63 3.48 2.17 12.2 9.96 9.35 9.16 11.6 9.06 8.77 9.09 7.83

0.03 0.04 0.04 0.04 0.03 0.04 0.04 0.04 0.04 0.04 0.04J 0.03 0.03 0.02J 0.02J 0.04

178 167 165 168 180 191 202 182 167 462 381 341 318 344 360 374 351 324

83.9 99.4 99.9 112 116 130 122 112 85.3 195 195 168 163 169 172 187 196 198

0.2 0.3 1.97 0.379 0.692 0.158 0.098 0.149 0.1 0.2 2.29 0.282 0.556 0.127 0.099 0.12

0.358 0.307 0.39 0.501 0.308 0.317 0.317 0.308 1.91 1.79 1.75 1.84 1.69 1.69 1.63 1.86

0.136 0.769 0.5256 0.92 0.585 0.722 2.577 0.598 1.06 1.925 2.662 1.033 0.578 0.821 3.433 0.668

0.2 0.21 0.19 0.21 0.2 0.21 0.19 0.2 0.21 0.18 0.19 0.18 0.2 0.2 0.2 0.2 0.17 0.21

0.114 0.065 0.093 0.14 0.055 0.051 0.1 0.033 0.08 0.044 0.03J 0.021 0.02J 0.02J 0.01J 0.02J

0.034 0.035 0.023 0.033 0.042 0.041 0.033 0.038 0.085 0.078 0.063 0.071 0.086 0.077 0.075 0.081

0.005U 0.005U 0.005U 0.005U 0.005U 0.003J 0.005U 0.005U 0.005U 0.005U 0.005U 0.005U 0.005U 0.002J 0.005U 0.005U

3.2 2.47 2.71 2.52 2.53 2.53 2.54 2.41 54.6 52.4 54.7 46.8 44.6 43.2 48.1 45.5

3.1 2.5 2.7 2.2 2.2 1.7 2 2.5 0.2 0.2 0.3 0.2 0.2 0.2J 0.2 0.4

1280 1310 1300 1430 1420 1500 1510 1400 1150 2650 2510 2300 2290 2350 2280 2240 2260 2170

602 626 618 634 663 716 708 685 544 1480 1500 1290 1190 1200 1180 1130 1190 1170

0.03J 0.02J 0.03J 0.03J 0.119 0.02J 0.04J 0.02J 0.06J 0.05J 0.05J 0.138 0.09 0.04J 0.04J 0.05J

7.04 7.1 7.19 7.04 6.94 7.01 7.67 7.53 7.09 7.6 7.37 7.37 7.31 7.16 7.48 7.9 7.32

Notes:




SU: standard unit



-: Not sampled


MW-1604S MW-1605D




Antimony µg/L

Arsenic µg/L

Barium µg/L

Beryllium µg/L

Boron mg/L

Cadmium µg/L

Calcium mg/L

Chloride mg/L

Chromium µg/L

Cobalt µg/L


Fluoride mg/L

Lead µg/L

Lithium mg/L

Mercury µg/L

Molybdenum µg/L

Selenium µg/L


Sulfate mg/L

Thallium µg/L

pH SU

Parameter Unit 9/27/2016 11/1/2016 12/20/2016 2/21/2017 3/28/2017 4/18/2017 5/16/2017 6/13/2017 10/31/2017 9/27/2016 11/2/2016 12/20/2016 2/21/2017 3/28/2017 4/18/2017 5/16/2017 6/13/2017 10/31/2017

Detection Detection

0.16 0.07 0.07J 0.04J 0.03J 0.06J 0.06J 0.05J 0.19 0.19 0.16 0.16 0.15 0.25 0.19 0.16

1.38 0.93 0.88 0.86 0.63 0.74 0.88 0.75 0.71 0.84 0.63 0.51 0.44 1.38 0.63 0.52

49.6 38.2 37 36 32.5 31.9 33.3 30.8 64 62.6 58.4 52.6 53.6 64.2 56.7 52

0.02J 0.009J 0.04U 0.007J 0.02U 0.04U 0.04U 0.04U 0.005J 0.02U 0.02U 0.02U 0.02U 0.01J 0.031 0.04U

8.3 6.55 7.3 9.04 10.8 8.69 8.75 8.8 5.88 4.29 3.97 4.96 5.48 6.9 5.46 5.26 5.9 7.03

0.13 0.08 0.08 0.08 0.06 0.08 0.08 0.08 0.07 0.07 0.06 0.07 0.05 0.08 0.07 0.08

224 220 279 249 261 244 251 218 212 278 252 260 242 247 274 278 262 287

150 159 173 179 212 180 217 191 222 190 201 206 190 187 104 218 219 213

0.6 0.7 2.85 0.39 0.349 0.245 0.585 0.387 0.3 0.9 0.736 0.3 0.541 0.853 0.163 0.153

3.16 1.26 0.861 1.1 0.448 0.715 0.647 0.708 2.2 1.92 1.52 1.33 1.17 4.26 1.39 1.46

0.777 2.692 0.337 0.785 0.466 0.827 2.733 0.611 8.459 3.659 1.179 1.71 1.459 1.212 3.18 1.026

0.24 0.25 0.22 0.25 0.25 0.23 0.26 0.24 0.25 0.25 0.28 0.24 0.26 0.26 0.26 0.26 0.24 0.24

2.18 0.793 0.41 0.636 0.181 0.285 0.382 0.541 0.522 0.491 0.164 0.082 0.087 2.04 0.162 0.084

0.086 0.084 0.076 0.068 0.076 0.067 0.076 0.071 0.129 0.12 0.11 0.109 0.13 0.119 0.124 0.132

0.005U 0.005U 0.005U 0.005U 0.005U 0.003J 0.005U 0.005U 0.005U 0.005U 0.005U 0.005U 0.005U 0.004J 0.005U 0.005U

25.8 23.9 22.9 17.5 15.4 20.8 18.6 17.8 81.4 81.2 83.2 76.6 73.3 71.5 79.1 77.8

1.1 0.9 0.7 1.1 1 3 1.7 1.7 1.8 4.7 3.6 4.1 3.6 4.1 5.9 8.1

1910 1930 2160 2220 2250 2120 2160 1980 2000 1710 1720 1690 1670 1700 1690 1730 1680 1590

965 1010 1180 1110 1110 1100 1060 1000 1040 813 796 796 759 739 385 764 752 770

0.174 0.055 0.05J 0.055 0.102 0.04J 0.06J 0.05J 0.123 0.092 0.094 0.119 0.113 0.097 0.095 0.09J

7.45 7.34 7.35 7.19 7.05 7.36 7.74 7.77 7.18 7.16 7.43 7.54 7.33 7.22 7.42 8 7.47 7.34

Notes:




SU: standard unit



-: Not sampled


MW-1605S MW-1606D




Antimony µg/L

Arsenic µg/L

Barium µg/L

Beryllium µg/L

Boron mg/L

Cadmium µg/L

Calcium mg/L

Chloride mg/L

Chromium µg/L

Cobalt µg/L


Fluoride mg/L

Lead µg/L

Lithium mg/L

Mercury µg/L

Molybdenum µg/L

Selenium µg/L


Sulfate mg/L

Thallium µg/L

pH SU

Parameter Unit 9/27/2016 11/2/2016 12/20/2016 2/21/2017 3/28/2017 4/18/2017 5/16/2017 6/13/2017 10/31/2017 9/27/2016 11/2/2016 12/20/2016 2/21/2017 3/29/2017 4/18/2017 5/16/2017 6/14/2017 10/31/2017

Detection Detection

0.16 0.17 0.16 0.15 0.14 0.16 0.16 0.16 0.04J 0.03J 0.03J 0.03J 0.05 0.03J 0.03J 0.03J

0.88 0.94 0.83 0.88 0.78 0.86 0.9 0.81 0.91 1.02 1.02 1.14 1.24 1 1.11 0.98

76.7 69.7 71.6 77.2 75.7 74.2 74.1 77.1 117 155 168 133 140 126 129 131

0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.02U 0.04U 0.02U 0.02U 0.02U 0.02U 0.008J 0.02U 0.02U 0.02U

5.25 4.57 5.35 5.03 6.67 5.8 5.72 6.12 9.54 1.64 1.42 1.46 1.54 1.89 1.58 1.54 1.5 1.76

0.08 0.07 0.07 0.08 0.06 0.07 0.07 0.09 0.02J 0.02J 0.005J 0.02U 0.03 0.02U 0.02U 0.02U

219 183 200 211 217 228 228 230 226 141 155 187 165 162 168 156 159 214

182 183 170 231 226 217 227 230 187 88.3 103 118 107 106 104 102 104 138

0.2 0.4 1.26 0.384 0.742 0.134 0.093 0.178 0.3 0.7 2.07 0.09 0.602 0.133 0.078 0.141

0.466 0.432 0.28 0.372 0.258 0.234 0.241 0.281 0.439 0.396 0.526 0.481 0.805 0.414 0.399 0.439

0.592 1.55 1.656 0.993 0.945 1.303 2.167 1.28 0.86 3.997 1.689 0.883 1.872 1.535 1.265 1.764

0.5 0.57 0.46 0.46 0.45 0.43 0.45 0.45 0.46 0.54 0.61 0.5 0.51 0.52 0.52 0.52 0.49 0.47

0.234 0.207 0.084 0.158 0.096 0.07 0.062 0.09 0.179 0.058 0.038 0.041 0.628 0.07 0.041 0.124

0.116 0.103 0.102 0.108 0.126 0.117 0.11 0.118 0.068 0.069 0.075 0.072 0.087 0.079 0.087 0.088

0.005U 0.005U 0.005U 0.005U 0.005U 0.002J 0.005U 0.005U 0.005U 0.005U 0.005U 0.005U 0.002J 0.002J 0.005U 0.005U

112 112 101 93.1 90.1 92.4 90.2 95.7 96.2 91.1 89.6 87.7 85.9 81.8 91.2 90.8

1.2 1 0.9 0.7 0.7 0.8 0.9 0.9 0.1 0.07J 0.03J 0.03J 0.5 0.05J 0.04J 0.03J

1470 1470 1420 1500 1500 1540 3230 1540 1410 744 856 1050 1010 938 904 876 872 1290

621 638 621 578 589 615 635 643 644 285 376 474 415 393 383 347 365 626

0.074 0.06 0.063 0.086 0.1 0.062 0.069 0.07J 0.05J 0.04J 0.04J 0.04J 0.062 0.02J 0.02J 0.04J

5.99 7.24 7.33 7.13 7.03 7.2 7.74 7.39 7.13 6.9 7.77 7.72 7.62 7.64 7.62 8.41 7.57 7.58

Notes:




SU: standard unit



-: Not sampled

Background

MW-1606S

Background

MW-1607D




Antimony µg/L

Arsenic µg/L

Barium µg/L

Beryllium µg/L

Boron mg/L

Cadmium µg/L

Calcium mg/L

Chloride mg/L

Chromium µg/L

Cobalt µg/L


Fluoride mg/L

Lead µg/L

Lithium mg/L

Mercury µg/L

Molybdenum µg/L

Selenium µg/L


Sulfate mg/L

Thallium µg/L

pH 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 10/31/2017 9/27/2016 11/1/2016 12/19/2016 2/22/2017 3/27/2017 4/17/2017 5/15/2017 6/12/2017 10/31/2017

Background Detection Detection

0.46 0.45 0.84 0.42 0.43 0.55 0.5 0.48 0.1 0.04J 0.04J 0.03J 0.03J 0.04J 0.04J 0.03J

1.86 1.3 11.2 1.19 1.17 1.62 1.17 1.1 0.82 0.53 0.68 0.52 0.56 0.5 0.49 0.49

56.7 55.5 114 63.9 66.8 67.6 63.7 62.9 42 33.4 32.2 32.4 31.4 35.3 35.1 36.4

0.01J 0.02U 0.123 0.007J 0.02U 0.01J 0.02U 0.02U 0.02J 0.02U 0.009J 0.02U 0.02U 0.02U 0.02U 0.02U

1.38 1.35 1.02 1.27 1.7 1.65 1.64 1.74 1.32 0.15 0.113 0.118 0.156 0.238 0.233 0.2 0.169 0.14

0.06 0.04 0.22 0.03 0.02 0.06 0.03 0.03 0.03 0.02J 0.02 0.01J 0.01J 0.01J 0.008J 0.006J

126 126 129 131 131 135 133 136 165 93.8 86.2 83 83.3 80.3 101 102 110 94.7

90.8 90.6 92.7 91.9 93.1 92.6 97.5 96.3 100 6.55 6.43 4.25 4.37 5.27 7.08 8.62 8.23 5.13

0.8 0.4 3.1 0.325 0.39 0.514 0.226 0.2 0.9 0.6 2.78 0.364 0.335 0.223 0.151 0.277

2.59 0.752 20.1 1.21 0.942 2.6 0.851 0.936 1.21 0.254 0.588 0.24 0.33 0.196 0.098 0.04

2.504 1.338 2.81 1.974 1.153 1.632 2.408 1.017 0.454 2.282 0.379 1.235 0.417 0.1298 0.857 0.146

0.31 0.32 0.33 0.29 0.28 0.3 0.29 0.27 0.28 0.27 0.3 0.26 0.25 0.24 0.23 0.23 0.21 0.22

1.4 0.264 11 0.267 0.134 1.25 0.159 0.138 0.881 0.232 0.405 0.205 0.274 0.173 0.073 0.024

0.098 0.092 0.088 0.091 0.11 0.102 0.094 0.106 0.003 0.004 0.001U 0.003 0.006 0.006 0.006 0.016

0.003J 0.005U 0.012 0.005U 0.005U 0.003J 0.005U 0.005U 0.005U 0.005U 0.005U 0.005U 0.005U 0.002J 0.005U 0.005U

48.4 50.4 45.7 41.3 39.2 45.1 48.1 46.1 2.35 2.16 1.94 1.4 2.49 1.89 2.08 1.57

7.1 7 9.4 9 9.2 8.9 9.1 9.4 1.2 1.3 1.1 1.5 1.3 1.3 1 1.1

670 698 716 746 706 678 746 708 860 368 352 338 398 350 424 475 486 430

213 214 246 244 233 225 221 229 343 70.6 64.3 58.3 94.4 112 168 208 204 131

0.06 0.05J 0.15 0.069 0.052 0.058 0.05J 0.05J 0.03J 0.081 0.03J 0.053 0.04J 0.01J 0.01J 0.02J

7.55 7.55 7.7 7.52 7.44 7.58 8.23 7.46 7.46 7.39 7.26 7.32 7.07 6.77 7.01 7.75 6.66 7.13

Notes:




SU: standard unit



-: Not sampled


MW-1607S MW-1608

Table 2: Outlier Analysis Summary

Mountaineer Plant - Bottom Ash Ponds


Location Well ID Sample Date Parameter Reported Value Units Conclusions

Compliance MW-1607S 12/21/2016 Arsenic 0.0112 mg/L

This value was removed from the dataset as an outlier. Multiple parameters

for this sample were identified as potential outliers, suggesting possible

sampling error.

Compliance MW-1607S 12/21/2016 Barium 0.114 mg/L



sampling error.

Compliance MW-1607D 9/27/2016 Chloride 88.3 mg/L

This value was not removed from the dataset, as conditions at the well were

largely consisted over time and were similar in concentrations to neighboring

wells.

Compliance MW-1607D 12/20/2016 Chloride 118 mg/L

This value was not removed from the dataset, as conditions at the well were

largely consisted over time and were similar in concentrations to neighboring

wells.

Compliance MW-1604S 9/26/2016Combined

Radium0.136 pCi/L

This value was removed from the dataset as an outlier. Its removal did not

affect the calculated background values.

Compliance MW-1607S 12/21/2016 Mercury 0.012 mg/L



sampling error.

Compliance MW-1604S 9/26/2016 Molybdenum 0.0032 mg/LThis value was removed from the dataset as an outlier. Its removal did not

affect the calculated background values.

Compliance MW-1607S 5/16/2017 pH 8.23 SU

This value was removed from the dataset as an outlier. MW-1607S and MW-

1607D were sampled sequentially and both had anomalously high pH values,

suggesting possible field instrumentation error.

Compliance MW-1607D 9/27/2016 pH 6.90 SUThis value was not removed from the dataset, as it was similar in

concentrations to neighboring wells.

Compliance MW-1607D 5/16/2017 pH 8.41 SU

This value was removed from the dataset as an outlier. MW-1607S and MW-

1607D were sampled sequentially and both had anomalously high pH values,

suggesting possible field instrumentation error.

Compliance MW-1607S 12/21/2016 Thallium 0.00015 mg/L



sampling error.

Compliance MW-1606S 5/16/2017Total Dissolved

Solids3230 mg/L

This value was removed from the dataset as an outlier per the Unified

Guidance .

Table 3: Background Level Summary

Mountaineer Plant - Bottom Ash Ponds


Parameter Units Description MW-1604D MW-1604S MW-1605D MW-1605S MW-1606D MW-1606S MW-1607D MW-1607S

Boron mg/L Interwell Background Value (UPL)

Calcium mg/L Interwell Background Value (UPL)

Chloride mg/L Interwell Background Value (UPL)

Fluoride mg/L Interwell Background Value (UPL)

SU Intrawell Background Value (UPL) 8.08 7.991 8.258 8.152 8.222 8.662 7.77 7.831

SU Intrawell Background Value (LPL) 6.653 6.389 6.653 6.66 6.671 5.6 6.9 7.255

Total Dissolved Solids mg/L Interwell Background Value (UPL)

Sulfate mg/L Interwell Background Value (UPL)

Notes:

UPL: Upper prediction limit

LPL: Lower prediction limit

613.3

pH

0.684

192

57.7

0.2989

1003

ATTACHMENT A Evaluation of Detection Monitoring Data

150 E.Wilson Bridge Road, Suite 232 Columbus, Ohio 43085

PH 614.468.0415 FAX 614.468.0416

www.geosyntec.com

CHA8423 20180227 Mountaineer BAP Addendum Memo

M e mo r a n d u m

Date: February 27, 2018

To: David Miller (AEP)

Copies to: Matt Powell (AEP)

From: Allison Kreinberg and Bruce Sass, Ph.D. (Geosyntec)

Subject: Evaluation of Detection Monitoring Data at Mountaineer Plant’s Bottom Ash Pond (BAP)

In accordance with the United States Environmental Protection Agency’s (USEPA’s) regulations regarding the disposal of coal combustion residuals (CCR) in landfills and surface impoundments (40 CFR 257.90-257.98, “CCR rule”), detection monitoring events were completed on October 30-31, 2017 and January 22, 2018 at the Bottom Ash Pond (BAP), an existing CCR unit at the Mountaineer Power Plant located in Letart, West Virginia.

Eight background monitoring events were conducted at the Mountaineer BAP prior to these detection monitoring events, and upper prediction limits (UPLs) were calculated for each Appendix III parameter to represent background values. A lower prediction limit (LPL) was also calculated for pH. Details on the calculation of these background values are described in Geosyntec’s Statistical Analysis Summary report, dated January 15, 2018.

To achieve an acceptably high statistical power while maintaining a site-wide false-positive rate (SWFPR) of 10% per year or less, prediction limits were calculated based on a one-of-two retesting procedure. With this procedure, a statistically significant increase (SSI) is only concluded if both samples in a series of two exceeds the UPL. In practice, if the initial result did not exceed the UPL, a second sample was not collected or analyzed.

Detection monitoring results and the relevant background values are summarized in Table 1.

• Boron concentrations exceeded interwell UPL of 0.684 mg/L in both the initial (2.6 mg/L) second (3.07 mg/L) samples collected at MW-1604D, in both the initial (2.17 mg/L) and second (2.36 mg/L) samples collected at MW-1604S, in both the initial (7.83 mg/L) and second (9.33 mg/L) samples collected at MW-1605D, in both the initial (5.88 mg/L) and

Evaluation of Detection Monitoring Data – Mountaineer BAP February 27, 2018 Page 2


second (10.1 mg/L) samples collected at MW-1605S, in both the initial (7.03 mg/L) and final (9.59 mg/L) samples collected at MW-1606D, in both the initial (9.54 mg/L) and final (6.62 mg/L) samples collected at MW-1606S, in both the initial (1.76 mg/L) and final (2.34 mg/L) samples collected at MW-1607D, and in both the initial (1.32 mg/L) and final (1.49 mg/L) samples collected at MW-1607S. Therefore, an SSI over background is concluded for boron at MW-1604D, MW-1604S, MW-1605D, MW-1605S, MW-1606D, MW-1606S, MW-1607D, and MW-1607S.

• Calcium concentrations exceeded the interwell UPL of 192 mg/L in both the initial (295 mg/L) and second (291 mg/L) samples collected at MW-1604D, in the initial (324 mg/L) and second (321 mg/L) samples collected at MW-1605D, in both the initial (212 mg/L) and second (231 mg/L) samples collected at MW-1605S, in both the initial (287 mg/L) and second (322 mg/L) samples collected at MW-1606D, in both the initial (226 mg/L) and second (218 mg/L) samples collected at MW-1606S, and in both the initial (214 mg/L) and second (244 mg/L) samples collected at mW-1607D. Therefore, an SSI over background is concluded for calcium at MW-1604D, MW-1605D, MW-105S, MW-1606D, MW-1606S, and MW-1607D.

• Chloride concentrations exceeded the interwell UPL of 57.7 mg/L in both the initial (116 mg/L) and second (118 mg/L)samples collected at MW-1604D, in both the initial (85.3 mg/L) and second (105 mg/L) samples collected at MW-1604S, in both the initial (198 mg/L) and second (197 mg/L) samples collected at MW-1605D, in both the initial (222 mg/L) and second (220 mg/L) samples collected at MW-1605S, in both the initial (213 mg/L) and second (327 mg/L) samples collected at MW-1606D, in both the initial (226 mg/L) and second (218 mg/L) samples collected at MW-1606S, in both the initial (138 mg/L) and second (150 mg/L) samples collected at MW-1607D, and in both the initial (100 mg/L) and second (111 mg/L) samples collected at MW-1607S. Therefore, an SSI over background is concluded for chloride at MW-1604D, MW-1604S, MW-1605D, MW-1605S, MW-1606D, MW-1606S, MW-1607D, and MW-1607S.

• Total dissolved solids (TDS) concentrations exceeded the interwell UPL of 1003 mg/L in both the initial (1570 mg/L) and second (1620 mg/L) samples collected at MW-1604D, in both the initial (1150 mg/L) and second (1312 mg/L) sample collected at MW-1604S, in both the initial (2170 mg/L) and second (2060 mg/L) samples collected at MW-1605D, in both the initial (2000 mg/L) and second (1970 mg/L) samples collected at MW-1605S, in both the initial (1590 mg/L) and second (1730 mg/L) samples collected at MW-1606D, in both the initial (1410 mg/L) and second (1450 mg/L) samples collected at MW-1606S, in both the initial (1290 mg/L) and second (1380 mg/L) samples collected at MW-1607D.

Evaluation of Detection Monitoring Data – Mountaineer BAP February 27, 2018 Page 3


Therefore, an SSI over background is concluded for TDS at MW-1604D, MW-1604S, MW-1605D, MW-1605S, MW-1606D, MW-1606S, and MW-1607D.

• Sulfate concentrations exceeded the interwell UPL of 613 mg/L in both the initial (833 mg/L) and second (862 mg/L) samples collected at MW-1604D, in both the initial (1170 mg/L) and second (1070 mg/L) samples collected at MW-1605D, in both the initial (1040 mg/L) and second (976 mg/L) samples collected at MW-1605S, in both the initial (770 mg/L) and second (760 mg/L) samples collected at MW-1606D, in both the initial (644 mg/L) and second (660 mg/L) samples collected at MW-1606S, in both the initial (626 mg/L) and second (668 mg/L) samples collected at MW-1607D. Therefore, an SSI over background is concluded for sulfate at MW-1604D, MW-1605D, MW-1605S, MW-1606D, MW-1606S, and MW-1607D.

As a result, the Mountaineer BAP CCR unit will conduct an alternate source demonstration. No other exceedances of UPLs were observed during these detection monitoring events.

* * * * *

Table 1: Detection Monitoring Data EvaluationMountaineer Plant - Bottom Ash Pond


10/30/2017 1/22/2018 10/30/2017 1/22/2018 10/31/2017 1/22/2018 10/31/2017 1/22/2018mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 2.6 3.07 2.17 2.36 7.83 9.33 5.88 10.1mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 295 291 167 - 324 321 212 231mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 116 118 85.3 105 198 197 222 220mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 0.2 - 0.21 - 0.21 - 0.25 -SU Intrawell Background Value (UPL)SU Intrawell Background Value (LPL)SU Detection Monitoring Result 7.21 7.2 7.09 6.9 7.32 7..2 7.18 7.1

mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 1570 1620 1150 1312 2170 2060 2000 1970mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 833 862 544 602 1170 1070 1040 976

10/31/2017 1/23/2018 10/31/2017 1/23/2018 10/31/2017 1/23/208 10/31/2017 1/23/2018mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 7.03 9.59 9.54 6.62 1.76 2.34 1.32 1.49mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 287 322 226 218 214 244 165 -mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 213 327 187 184 138 150 100 111mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 0.24 - 0.46 0.43 0.47 0.44 0.28 -SU Intrawell Background Value (UPL)SU Intrawell Background Value (LPL)SU Detection Monitoring Result 7.34 7.4 7.13 7.2 7.58 7.5 7.46 7..4

mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 1590 1730 1410 1450 1290 1380 860 -mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 770 760 644 660 626 668 343 -

Notes:UPL: Upper prediction limitLPL: Lower prediction limit-: Not SampledBold values exceed the background value.Background values are shaded gray.

613.3

MW-1606D MW-1606S MW-1607D MW-1607S

0.684

192

57.7

0.2989

6.671 5.6 6.9 7.255

1003

8.222 8.662 7.77 7.831

Chloride

Fluoride

pH

Total Dissolved Solids

Sulfate

Parameter Units Description

Boron

Calcium

0.684

192

57.7

1003

613

6.65 6.39 6.65

MW-1604D MW-1604S MW-1605D MW-1605S


Sulfate


Boron

Calcium

8.156.66

Chloride

Fluoride

pH

0.299

8.08 7.99 8.26

ATTACHMENT BStatistical Analysis Output

Groundwater Stats Consulting www.groundwaterstats.com ● ph: 913.829.1470

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GROUNDWATER STATS CONSULTING

December 27, 2017 Geosyntec Consultants Attn: Mr. Bruce Sass 150 E. Wilson Bridge Rd., #232 Worthington, OH 43085 Dear Mr. Sass, Groundwater Stats Consulting, formerly the statistical consulting division of Sanitas Technologies, is pleased to provide the screening and statistical analysis of background groundwater data for American Electric Power’s Mountaineer Bottom Ash Pond. The analysis complies with the federal rule for the Disposal of Coal Combustion Residuals from Electric Utilities (CCR Rule, 2015) as well as with the USEPA Unified Guidance (2009). Sampling began at Mountaineer Bottom Ash Pond for the CCR program in 2016, and 8 background samples have been collected at each of the groundwater monitoring wells. The monitoring well network, as provided by Geosyntec Consultants, consists of the following: upgradient wells MW-1601A, MW-1602, MW-1603, MW-1608; and downgradient wells MW-1604D, MW-1604S, MW-1605D, MW-1605S, MW-1606D, MW-1606S, MW-1607D, MW-1607S. Data were sent electronically to Groundwater Stats Consulting, and the statistical analysis was reviewed by Dr. Kirk Cameron, PhD Statistician with MacStat Consulting, primary author of the USEPA Unified Guidance, and Senior Advisor to Groundwater Stats Consulting. The following constituents were evaluated: Appendix III parameters – boron, calcium, chloride, fluoride, pH, sulfate, and TDS; and Appendix IV parameters - antimony, arsenic, barium, beryllium, cadmium, chromium, cobalt, combined radium 226 & 228, fluoride, lead, lithium, mercury, molybdenum, selenium, and thallium. Time series plots for Appendix III and IV parameters at all wells are provided for the purpose of screening data at these wells (Figure A). Additionally, box plots are included for all constituents at upgradient and downgradient wells (Figure B). The time series plots are used to initially screen for suspected outliers and trends, while the box plots provide visual representation of variation within individual wells and between all wells. Data at all wells were evaluated for the following: 1) outliers; 2) trends; 3) most appropriate statistical method for Appendix III parameters based on site characteristics of groundwater data upgradient of the facility; and 4) eligibility of downgradient wells when intrawell statistical methods are recommended. Power

http://www.groundwaterstats.com


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curves are provided to demonstrate that the selected statistical methods for Appendix III parameters comply with the USEPA Unified Guidance recommendations as discussed below. Summary of Statistical Method:

1) Intrawell prediction limits, combined with a 1-of-2 resample plan for pH; and 2) Interwell prediction limits combined with a 1-of-2 resample plan for boron, calcium, chloride,

fluoride, sulfate, and TDS.

Parametric prediction limits are utilized when the screened historical data follow a normal or transformed-normal distribution. When data cannot be normalized or the majority of data are nondetects, a nonparametric test is utilized. The distribution of data is tested using the Shapiro-Wilk/Shapiro-Francia test for normality. After testing for normality and performing any adjustments as discussed below (US EPA, 2009), data are analyzed using either parametric or non-parametric prediction limits.

• No statistical analyses are required on wells and analytes containing 100% nondetects (USEPA Unified Guidance, 2009, Chapter 6).

• When data contain <15% nondetects in background, simple substitution of one-half the reporting limit is utilized in the statistical analysis. The reporting limit utilized for nondetects is the practical quantification limit (PQL) as reported by the laboratory.

• When data contain between 15-50% nondetects, the Kaplan-Meier nondetect adjustment is applied to the background data. This technique adjusts the mean and standard deviation of the historical concentrations to account for concentrations below the reporting limit.

• Nonparametric prediction limits are used on data containing greater than 50% nondetects.

Background Screening Outlier Evaluation Time series plots are used to identify suspected outliers, or extreme values that would result in limits that are not conservative from a regulatory perspective, in proposed background data. Suspected outliers at all wells for Appendix III and Appendix IV parameters were formally tested using Tukey’s box plot method and, when identified, flagged in the computer database with “o” and deselected prior to construction of statistical limits (Figure C). Tukey’s outlier test noted a few outliers as may be seen on the Outlier Summary Table and accompanying graphs. Any values flagged as outliers are plotted in a lighter font on the time series graph. The test identified two outliers for chloride and one low outlier for pH in well MW-1607D; however, these values were not flagged due to all concentrations being consistent over time and similar to concentrations in neighboring wells. The high value identified as an outlier for pH at well MW-1607D was, however, flagged in the database. A substitution of the most recent reporting limit was applied when varying detection limits existed in data.



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No true seasonal patterns were observed on the time series plots for any of the detected data; therefore, no deseasonalizing adjustments were made to the data. When seasonal patterns are observed, data may be deseasonalized so that the resulting limits will correctly account for the seasonality as a predictable pattern rather than random variation or a release. While trends may be visual, a quantification of the trend and its significance is needed. The Sen’s Slope/Mann Kendall trend test was used to evaluate all data at each well to identify statistically significant increasing or decreasing trends (Figure D). In the absence of suspected contamination, significant trending data are typically not included as part of the background data used for construction of prediction limits. This step serves to eliminate the trend and, thus, reduce variation in background. When statistically significant decreasing trends are present, earlier data are evaluated to determine whether earlier concentration levels are significantly different than current reported concentrations and will be deselected as necessary. When the historical records of data are truncated for the reasons above, a summary report will be provided to show the date ranges used in construction of the statistical limits. The results of the trend analyses showed a handful of statistically significant trends as may be seen on the Trend Test Summary table that accompanies the trend tests. All trends were relatively low in magnitude when compared to average concentrations. One exception is chloride in upgradient well MW-1601A which shows a statistically significant increasing trend over time. However, concentrations in this well are similar to neighboring upgradient well concentrations and, therefore, required no adjustment at this time. This well will continue to be monitored and re-evaluated as more data are collected. Appendix III – Determination of Spatial Variation The Analysis of Variance (ANOVA) was used to statistically evaluate differences in average concentrations among upgradient wells, which assists in identifying the most appropriate statistical approach (Figure E). Interwell tests, which compare downgradient well data to statistical limits constructed from pooled upgradient well data, are appropriate when average concentrations are similar across upgradient wells. Intrawell tests, which compare compliance data from a single well to screened historical data within the same well, are appropriate when upgradient wells exhibit spatial variation; when statistical limits constructed from upgradient wells would not be conservative from a regulatory perspective; and when downgradient water quality is unimpacted compared to upgradient water quality for the same parameter. The ANOVA identified variation for all Appendix III parameters; therefore, these data were further evaluated as described for the appropriateness of intrawell testing to accommodate the groundwater quality. A summary table of the ANOVA results is included with the reports. Appendix III - Statistical Limits Intrawell limits constructed from carefully screened background data from within each well serve to provide statistical limits that are conservative (i.e. lower) from a regulatory perspective, and that will rapidly identify a change in more recent compliance data from within a given well. This statistical method removes the element of variation from across wells and eliminates the chance of mistaking natural spatial variation for a release from the facility. Prior to performing intrawell prediction limits, several steps are required to reasonably demonstrate downgradient water quality does not have existing impacts from the practices of the facility.



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Exploratory data analysis was used as a general comparison of concentrations in downgradient wells for all Appendix III parameters recommended for intrawell analyses to concentrations reported in upgradient wells. Upper tolerance limits are used in conjunction with confidence intervals to determine whether the estimated averages in downgradient wells are higher than observed levels upgradient of the facility. The upper tolerance limits were constructed to represent the extreme upper range of possible background levels at the site. In cases where downgradient average concentrations are higher than observed concentrations upgradient for a given constituent, an independent study and hydrogeological investigation would be required to identify local geochemical conditions and expected groundwater quality for the region to justify an intrawell approach. Such an assessment is beyond the scope of services provided by Groundwater Stats Consulting. When there is not an obvious explanation for observed concentration differences in downgradient wells relative to reported concentrations in upgradient wells, interwell prediction limits will initially be selected for the statistical method until further evidence shows that concentrations are due to natural variation rather than a result of the facility. Parametric tolerance limits were constructed with a target of 99% confidence and 95% coverage using pooled upgradient well data for each of the Appendix III parameters (Figure F). The confidence and coverage levels for nonparametric tolerance limits are dependent upon the number of background samples. As more data are collected, the background population is better represented and the confidence and coverage levels increase. Confidence intervals were constructed on downgradient wells for each of the Appendix III parameters, using the tolerance limits discussed above, to determine intrawell eligibility (Figure G). When the entire confidence interval is above a background standard for a given parameter, interwell methods are initially recommended as the statistical method. Therefore, only parameters with confidence intervals which did not exceed background standards are eligible for intrawell prediction limits. Confidence intervals for the above parameters were found to be within their respective background limit for pH; while confidence intervals were above their respective background limits in at least one well for all other Appendix III parameters. Therefore, intrawell methods are recommended for pH, and interwell methods are initially recommended for boron, calcium, chloride, fluoride, sulfate and TDS. As mentioned earlier, if a demonstration supports natural variation in groundwater, intrawell methods will be considered for all parameters. All available data through June 2017 at each well were used to establish intrawell background limits based on a 1-of-2 resample plan that will be used for future comparisons (Figure H). Interwell prediction limits, combined with a 1-of-2 resample plan, were constructed from upgradient wells (Figure I). Downgradient measurements will be compared to these background limits during each subsequent semi-annual sampling event. Natural systems continuously evolve due to physical changes made to the environment. Examples include capping a landfill, paving areas near a well, or lining a drainage channel to prevent erosion. Periodic updating of background statistical limits will be necessary to accommodate these types of changes In the interwell case, newer data will be included in background when a minimum of 2 new samples are available.



-5-

In the intrawell case, data for all wells and constituents are re-evaluated when a minimum of 4 new data points are available to determine whether earlier concentrations are representative of present-day groundwater quality. In some cases, the earlier portion of data are deselected prior to construction of limits in order to provide sensitive limits that will rapidly detect changes in groundwater quality. Even though the data are excluded from the calculation, the values will continue to be reported and shown in tables and graphs. In the event of an initial exceedance of compliance well data, the 1-of-2 resample plan allows for collection of an additional sample to determine whether the initial exceedance is confirmed. When the resample confirms the initial exceedance, a statistically significant increase (SSI) is identified and further research would be required to identify the cause of the exceedance (i.e. impact from the site, natural variation, or an off-site source). If the resample falls within the statistical limit, the initial exceedance is considered to be a false positive result and, therefore, no further action is necessary. A summary table of the background prediction limits follows this letter. Appendix IV – Assessment Monitoring Program During an Assessment Monitoring program confidence intervals are constructed at all wells for detected Appendix IV parameters. A minimum of 4 samples is required to construct confidence intervals; however, 8 samples are generally recommended for better representation of the true average population. Established Maximum Contaminant Levels (MCLs) are used as the GWPS comparisons, unless background limits are higher as discussed below. Parametric confidence intervals are constructed with 99% confidence when data follow a normal or transformed-normal distribution. For all other cases, nonparametric confidence intervals are constructed, with the confidence level based on the number of samples available. The GWPS is exceeded only when the entire confidence interval exceeds its respective GWPS. Background limits are established for the Appendix IV parameters using upper tolerance limits constructed with 95% confidence/95% coverage using pooled upgradient well data, for comparison against established MCLs. When background limits, or Alternate Contaminant Levels (ACLs), are higher than established MCLs, the CCR Rule recommends using these ACLs as the GWPS for the confidence interval comparisons. Additionally, tolerance limits are also recommended to establish ACLs for Appendix IV parameters, cobalt, lithium, and molybdenum, which do not have established MCLs. Since the scope of this project included screening and development of background limits for Appendix III Detection Monitoring statistics, comparison of the Appendix IV parameters with confidence intervals was not included in this report. Recommendations

In summary, as a result of the background screening described in this letter, intrawell prediction limits combined with a 1-of-2 resample plan are recommended for pH; and interwell prediction limits combined with a 1-of-2 resample plan are recommended for boron, calcium, chloride, fluoride, sulfate, and TDS. The statistical analyses will be constructed according to the USEPA Unified Guidance, based on seven Appendix III parameters and eight downgradient wells.



-6-

Thank you for the opportunity to assist you in the statistical analysis of groundwater quality for the Mountaineer Bottom Ash Pond. If you have any questions or comments, please feel free to contact me. For Groundwater Stats Consulting,

Kristina L. Rayner Groundwater Statistician


0

0.00018

0.00036

0.00054

0.00072

0.0009

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Antimony, total Analysis Run 12/27/2017 6:38 PM View: Descriptive

Mountaineer BAP Client: Geosyntec Data: Mountaineer BAP

Sanitas™ v.9.6.00 Groundwater Stats Consulting. UG

mg/

L

Hollow symbols indicate censored values.

0

0.002

0.004

0.006

0.008

0.01

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Arsenic, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

0.04

0.08

0.12

0.16

0.2

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Barium, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

0.00004

0.00008

0.00012

0.00016

0.0002

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Beryllium, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L


0

4

8

12

16

20

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Boron, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

0.00006

0.00012

0.00018

0.00024

0.0003

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Cadmium, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L


0

100

200

300

400

500

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Calcium, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

60

120

180

240

300

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Chloride, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

0.0008

0.0016

0.0024

0.0032

0.004

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Chromium, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

0.006

0.012

0.018

0.024

0.03

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Cobalt, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

1.8

3.6

5.4

7.2

9

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Combined Radium 226 + 228 Analysis Run 12/27/2017 6:38 PM View: Descriptive



pCi/L

0

0.14

0.28

0.42

0.56

0.7

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Fluoride, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

0.004

0.008

0.012

0.016

0.02

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Lead, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

0.04

0.08

0.12

0.16

0.2

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Lithium, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L


0

0.000008

0.000016

0.000024

0.000032

0.00004

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Mercury, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L


0

0.04

0.08

0.12

0.16

0.2

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Molybdenum, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

1.8

3.6

5.4

7.2

9

9/26/16 11/19/16 1/12/17 3/7/17 4/30/17 6/23/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: pH, field Analysis Run 12/27/2017 6:38 PM View: Descriptive



SU

0

0.002

0.004

0.006

0.008

0.01

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Selenium, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

400

800

1200

1600

2000

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Sulfate, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

0.00008

0.00016

0.00024

0.00032

0.0004

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Thallium, total Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L


0

800

1600

2400

3200

4000

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/14/17

MW-1601A (bg)

MW-1602 (bg)

MW-1603 (bg)

MW-1608 (bg)

MW-1604D

MW-1604S

MW-1605D

MW-1605S

MW-1606D

MW-1606S

MW-1607D

MW-1607S

Time Series

Constituent: Total Dissolved Solids [TDS] Analysis Run 12/27/2017 6:38 PM View: Descriptive



mg/

L

0

0.00018

0.00036

0.00054

0.00072

0.0009

Box & Whiskers Plot

Constituent: Antimony, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8 12%nds

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

0

0.0006

0.0012

0.0018

0.0024

0.003

Box & Whiskers Plot

Constituent: Arsenic, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=7

______+

0

0.04

0.08

0.12

0.16

0.2

Box & Whiskers Plot

Constituent: Barium, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=7

______+

0

0.00004

0.00008

0.00012

0.00016

0.0002

Box & Whiskers Plot

Constituent: Beryllium, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8 100%nds

______+

MW-1602 (bg)

n=8 100%nds

______+

MW-1603 (bg)

n=8 87%nds

______+

MW-1608 (bg)

n=8 75%nds

______+

MW-1604D

n=8 100%nds

______+

MW-1604S

n=8 100%nds

______+

MW-1605D

n=8 100%nds

______+

MW-1605S

n=8 62%nds

______+

MW-1606D

n=8 62%nds

______+

MW-1606S

n=8 100%nds

______+

MW-1607D

n=8 87%nds

______+

MW-1607S

n=8 50%nds

______+

0

4

8

12

16

20

Box & Whiskers Plot

Constituent: Boron, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+MW

-1602 (bg)

n=8

______+MW

-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+MW

-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

0

0.00006

0.00012

0.00018

0.00024

0.0003

Box & Whiskers Plot

Constituent: Cadmium, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8 50%nds

______+

MW-1607S

n=8

______

+

0

100

200

300

400

500

Box & Whiskers Plot

Constituent: Calcium, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

0

60

120

180

240

300

Box & Whiskers Plot

Constituent: Chloride, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+MW

-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______

+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

0

0.0008

0.0016

0.0024

0.0032

0.004

Box & Whiskers Plot

Constituent: Chromium, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______

+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______

+

0

0.006

0.012

0.018

0.024

0.03

Box & Whiskers Plot

Constituent: Cobalt, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+MW

-1602 (bg)

n=8

______+MW

-1603 (bg)

n=8

______+MW

-1608 (bg)

n=8

______+MW

-1604D

n=8

______+

MW-1604S

n=8

______+MW

-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+MW

-1607D

n=8

______+MW

-1607S

n=8

______

+

0

1.8

3.6

5.4

7.2

9

Box & Whiskers Plot

Constituent: Combined Radium 226 + 228 Analysis Run 12/27/2017 6:39 PM View: Descriptive



pCi/L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=7

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______

+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

0

0.14

0.28

0.42

0.56

0.7

Box & Whiskers Plot

Constituent: Fluoride, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

0

0.004

0.008

0.012

0.016

0.02

Box & Whiskers Plot

Constituent: Lead, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+MW

-1602 (bg)

n=8

______+MW

-1603 (bg)

n=8

______+MW

-1608 (bg)

n=8

______+MW

-1604D

n=8

______+MW

-1604S

n=8

______+MW

-1605D

n=8

______+MW

-1605S

n=8

______+

MW-1606D

n=8

______+MW

-1606S

n=8

______+MW

-1607D

n=8

______+MW

-1607S

n=8

______+

0

0.04

0.08

0.12

0.16

0.2

Box & Whiskers Plot

Constituent: Lithium, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8 25%nds

______+MW

-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8 12%nds

______+MW

-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

0

0.000008

0.000016

0.000024

0.000032

0.00004

Box & Whiskers Plot

Constituent: Mercury, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8 87%nds

______+

MW-1602 (bg)

n=8 87%nds

______+

MW-1603 (bg)

n=8 87%nds

______+

MW-1608 (bg)

n=8 87%nds

______+

MW-1604D

n=8 75%nds

______

+

MW-1604S

n=8 87%nds

______+

MW-1605D

n=8 87%nds

______+

MW-1605S

n=8 87%nds

______+

MW-1606D

n=8 87%nds

______+

MW-1606S

n=8 87%nds

______+

MW-1607D

n=8 75%nds

______+

MW-1607S

n=7 71%nds

______+

0

0.04

0.08

0.12

0.16

0.2

Box & Whiskers Plot

Constituent: Molybdenum, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+MW

-1602 (bg)

n=8

______+MW

-1603 (bg)

n=8

______+MW

-1608 (bg)

n=8

______+MW

-1604D

n=8

______+

MW-1604S

n=7

______+MW

-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

0

1.6

3.2

4.8

6.4

8

Box & Whiskers Plot

Constituent: pH, field Analysis Run 12/27/2017 6:39 PM View: Descriptive



SU

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=7

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=7

______+

MW-1607S

n=7

______+

0

0.002

0.004

0.006

0.008

0.01

Box & Whiskers Plot

Constituent: Selenium, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+MW

-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+MW

-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+MW

-1607S

n=8

______

+

0

400

800

1200

1600

2000

Box & Whiskers Plot

Constituent: Sulfate, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

0

0.00008

0.00016

0.00024

0.00032

0.0004

Box & Whiskers Plot

Constituent: Thallium, total Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8 12%nds

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=8

______+

MW-1607D

n=8

______+

MW-1607S

n=7

______+

0

600

1200

1800

2400

3000

Box & Whiskers Plot

Constituent: Total Dissolved Solids [TDS] Analysis Run 12/27/2017 6:39 PM View: Descriptive



mg/

L

MW-1601A (bg)

n=8

______+

MW-1602 (bg)

n=8

______+

MW-1603 (bg)

n=8

______+

MW-1608 (bg)

n=8

______+

MW-1604D

n=8

______+

MW-1604S

n=8

______+

MW-1605D

n=8

______+

MW-1605S

n=8

______+

MW-1606D

n=8

______+

MW-1606S

n=7

______+

MW-1607D

n=8

______+

MW-1607S

n=8

______+

Outlier Summary TableMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 12/27/2017, 6:29 PM

9/26/2016

12/21/2016

5/16/2017

MW-1607S Arsenic, total (mg/L)

MW-1607S Barium, total (mg/L)

MW-1604S Combined Radium 226 + 228 (pCi/L)

MW-1607S Mercury, total (mg/L)

MW-1604S Molybdenum, total (mg/L)

MW-1607D pH, field (SU)

MW-1607S pH, field (SU)

MW-1607S Thallium, total (mg/L)

MW-1606S Total Dissolved Solids [TDS] (mg/L)

0.0112 (o) 0.114 (o)

0.136 (o)

1.2E-05 (o)

0.0032 (o)

8.41 (o) 8.23 (o)

0.00015 (o)

3230 (o)

Constituent Well Outlier Value(s) Method N Mean Std. Dev. DistributionNormality Test

Antimony, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.00003281 0.00001651 unknown ShapiroWilk

Arsenic, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.0004894 0.0001316 unknown ShapiroWilk

Barium, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.036 0.007279 unknown ShapiroWilk

Beryllium, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.00001919 0.000003237 unknown ShapiroWilk

Boron, total (mg/L) MW-1601A,MW-1602,... No n/a NP 32 0.2704 0.1738 ln(x) ShapiroWilk

Cadmium, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.00001419 0.000005844 unknown ShapiroWilk

Calcium, total (mg/L) MW-1601A,MW-1602,... No n/a NP 32 118.1 35.94 ln(x) ShapiroWilk

Chloride, total (mg/L) MW-1601A,MW-1602,... No n/a NP 32 20.15 16.78 ln(x) ShapiroWilk

Chromium, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.0005737 0.0006319 unknown ShapiroWilk

Cobalt, total (mg/L) MW-1601A,MW-1602,... No n/a NP 32 0.000195 0.0002196 ln(x) ShapiroWilk

Combined Radium 226 + 228 (pCi/L) MW-1601A,MW-1602,... No n/a NP 32 0.8645 0.6943 ln(x) ShapiroWilk

Fluoride, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.1788 0.05841 unknown ShapiroWilk

Lead, total (mg/L) MW-1601A,MW-1602,... No n/a NP 32 0.0001676 0.0001654 ln(x) ShapiroWilk

Lithium, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.009969 0.006916 unknown ShapiroWilk

Mercury, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.000004687 8.6e-7 unknown ShapiroWilk

Molybdenum, total (mg/L) MW-1601A,MW-1602,... No n/a NP 32 0.001396 0.0007736 sqrt(x) ShapiroWilk

pH, field (SU) MW-1601A,MW-1602,... No n/a NP 32 7.034 0.3558 sqrt(x) ShapiroWilk

Selenium, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.0007081 0.0005684 unknown ShapiroWilk

Sulfate, total (mg/L) MW-1601A,MW-1602,... No n/a NP 32 241.1 144.8 ln(x) ShapiroWilk

Thallium, total (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 0.00003769 0.00002583 unknown ShapiroWilk

Total Dissolved Solids [TDS] (mg/L) MW-1601A,MW-1602,... No n/a NP (nrm) 32 583.6 189.6 unknown ShapiroWilk

Outlier Analysis - Upgradient ResultsMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 12/27/2017, 6:27 PM


Arsenic, total (mg/L) MW-1607S Yes 0.0112 NP 8 0.002576 0.003495 ln(x) ShapiroWilk

Barium, total (mg/L) MW-1607S Yes 0.114 NP 8 0.06889 0.01873 ln(x) ShapiroWilk

Chloride, total (mg/L) MW-1607D Yes 88.3,118 NP 8 104 8.111 x^2 ShapiroWilk

Combined Radium 226 + 228 (pCi/L) MW-1604S Yes 0.136 NP 8 0.8541 0.7328 ln(x) ShapiroWilk

Mercury, total (mg/L) MW-1607S Yes 0.000012 NP (nrm) 8 0.000005375 0.000002825 unknown ShapiroWilk

Molybdenum, total (mg/L) MW-1604S Yes 0.0032 NP 8 0.002614 0.0002517 ln(x) ShapiroWilk

pH, field (SU) MW-1607D Yes 6.9,8.41 NP 8 7.656 0.4084 normal ShapiroWilk

pH, field (SU) MW-1607S Yes 8.23 NP 8 7.629 0.2556 ln(x) ShapiroWilk

Thallium, total (mg/L) MW-1607S Yes 0.00015 NP 8 0.00006738 0.00003405 ln(x) ShapiroWilk

Total Dissolved Solids [TDS] (mg/L) MW-1606S Yes 3230 NP 8 1709 615.9 ln(x) ShapiroWilk

Outlier Analysis - Significant Downgradient WellsMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 12/27/2017, 5:54 PM


Antimony, total (mg/L) MW-1604D No n/a NP 8 0.0001338 0.00001408 x^2 ShapiroWilk

Antimony, total (mg/L) MW-1604S No n/a NP (nrm) 8 0.000035 0.000005345 unknown ShapiroWilk

Antimony, total (mg/L) MW-1605D No n/a NP (nrm) 8 0.00003375 0.000005175 unknown ShapiroWilk

Antimony, total (mg/L) MW-1605S No n/a NP 8 0.0000675 0.00003991 ln(x) ShapiroWilk

Antimony, total (mg/L) MW-1606D No n/a NP 8 0.0001813 0.00003227 ln(x) ShapiroWilk

Antimony, total (mg/L) MW-1606S No n/a NP 8 0.0001575 0.000008864 x^4 ShapiroWilk

Antimony, total (mg/L) MW-1607D No n/a NP (nrm) 8 0.00003375 0.00000744 unknown ShapiroWilk

Antimony, total (mg/L) MW-1607S No n/a NP 8 0.0005163 0.0001372 ln(x) ShapiroWilk

Arsenic, total (mg/L) MW-1604D No n/a NP 8 0.0004988 0.00006244 ln(x) ShapiroWilk

Arsenic, total (mg/L) MW-1604S No n/a NP 8 0.0004275 0.00004334 ln(x) ShapiroWilk

Arsenic, total (mg/L) MW-1605D No n/a NP 8 0.002245 0.0001773 x^3 ShapiroWilk

Arsenic, total (mg/L) MW-1605S No n/a NP 8 0.0008813 0.0002242 ln(x) ShapiroWilk


Arsenic, total (mg/L) MW-1606S No n/a NP 8 0.00086 0.00005155 x^2 ShapiroWilk


Arsenic, total (mg/L) MW-1607S Yes 0.0112 NP 8 0.002576 0.003495 ln(x) ShapiroWilk

Barium, total (mg/L) MW-1604D No n/a NP 8 0.02828 0.001217 normal ShapiroWilk

Barium, total (mg/L) MW-1604S No n/a NP 8 0.02891 0.002121 ln(x) ShapiroWilk

Barium, total (mg/L) MW-1605D No n/a NP 8 0.02793 0.002131 ln(x) ShapiroWilk

Barium, total (mg/L) MW-1605S No n/a NP 8 0.03616 0.006024 ln(x) ShapiroWilk


Barium, total (mg/L) MW-1606S No n/a NP 8 0.07454 0.002726 x^6 ShapiroWilk


Barium, total (mg/L) MW-1607S Yes 0.114 NP 8 0.06889 0.01873 ln(x) ShapiroWilk

Beryllium, total (mg/L) MW-1604D No n/a NP (nrm) 8 0.00004 0 unknown ShapiroWilk

Beryllium, total (mg/L) MW-1604S No n/a NP (nrm) 8 0.00002 0 unknown ShapiroWilk

Beryllium, total (mg/L) MW-1605D No n/a NP (nrm) 8 0.00004 0 unknown ShapiroWilk

Beryllium, total (mg/L) MW-1605S No n/a NP (nrm) 8 0.0000295 0.00001497 unknown ShapiroWilk

Beryllium, total (mg/L) MW-1606D No n/a NP (nrm) 8 0.00003075 0.00001474 unknown ShapiroWilk

Beryllium, total (mg/L) MW-1606S No n/a NP (nrm) 8 0.00004 0 unknown ShapiroWilk

Beryllium, total (mg/L) MW-1607D No n/a NP (nrm) 8 0.0000185 0.000004243 unknown ShapiroWilk

Beryllium, total (mg/L) MW-1607S No n/a NP (nrm) 8 0.00002875 0.00003848 unknown ShapiroWilk

Boron, total (mg/L) MW-1604D No n/a NP 8 3.21 0.4376 ln(x) ShapiroWilk

Boron, total (mg/L) MW-1604S No n/a NP 8 3.035 0.8084 x^3 ShapiroWilk

Boron, total (mg/L) MW-1605D No n/a NP (nrm) 8 9.899 1.291 unknown ShapiroWilk

Boron, total (mg/L) MW-1605S No n/a NP 8 8.529 1.256 sqrt(x) ShapiroWilk

Boron, total (mg/L) MW-1606D No n/a NP 8 5.278 0.9165 x^(1/3) ShapiroWilk

Boron, total (mg/L) MW-1606S No n/a NP 8 5.564 0.6579 ln(x) ShapiroWilk

Boron, total (mg/L) MW-1607D No n/a NP 8 1.571 0.1457 ln(x) ShapiroWilk

Boron, total (mg/L) MW-1607S No n/a NP 8 1.469 0.2541 x^3 ShapiroWilk

Cadmium, total (mg/L) MW-1604D No n/a NP 8 0.000135 0.00002928 x^2 ShapiroWilk

Cadmium, total (mg/L) MW-1604S No n/a NP (nrm) 8 0.0000375 0.000004629 unknown ShapiroWilk

Cadmium, total (mg/L) MW-1605D No n/a NP (nrm) 8 0.0000325 0.000008864 unknown ShapiroWilk

Cadmium, total (mg/L) MW-1605S No n/a NP (nrm) 8 0.00008375 0.00001996 unknown ShapiroWilk

Cadmium, total (mg/L) MW-1606D No n/a NP 8 0.00006875 0.00000991 x^3 ShapiroWilk

Cadmium, total (mg/L) MW-1606S No n/a NP 8 0.00007375 0.000009161 ln(x) ShapiroWilk

Cadmium, total (mg/L) MW-1607D No n/a NP (nrm) 8 0.00001937 0.000006781 unknown ShapiroWilk

Cadmium, total (mg/L) MW-1607S No n/a NP 8 0.00006125 0.00006578 ln(x) ShapiroWilk

Calcium, total (mg/L) MW-1604D No n/a NP 8 284.6 15.56 x^4 ShapiroWilk

Calcium, total (mg/L) MW-1604S No n/a NP 8 179.1 12.79 ln(x) ShapiroWilk

Calcium, total (mg/L) MW-1605D No n/a NP 8 366.4 43.39 ln(x) ShapiroWilk

Calcium, total (mg/L) MW-1605S No n/a NP 8 243.3 21.5 sqrt(x) ShapiroWilk


Calcium, total (mg/L) MW-1606S No n/a NP 8 214.5 16.24 x^6 ShapiroWilk


Outlier Analysis - All Downgradient WellsMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 12/27/2017, 5:54 PM


Page 2

Calcium, total (mg/L) MW-1607S No n/a NP 8 130.9 3.758 x^6 ShapiroWilk

Chloride, total (mg/L) MW-1604D No n/a NP 8 113.4 3.462 ln(x) ShapiroWilk

Chloride, total (mg/L) MW-1604S No n/a NP 8 109.4 14.54 x^3 ShapiroWilk

Chloride, total (mg/L) MW-1605D No n/a NP 8 180.6 13.99 ln(x) ShapiroWilk

Chloride, total (mg/L) MW-1605S No n/a NP 8 182.6 23.45 ln(x) ShapiroWilk

Chloride, total (mg/L) MW-1606D No n/a NP 8 189.4 36.65 x^6 ShapiroWilk

Chloride, total (mg/L) MW-1606S No n/a NP (nrm) 8 208.3 25.42 unknown ShapiroWilk

Chloride, total (mg/L) MW-1607D Yes 88.3,118 NP 8 104 8.111 x^2 ShapiroWilk

Chloride, total (mg/L) MW-1607S No n/a NP 8 93.19 2.476 ln(x) ShapiroWilk

Chromium, total (mg/L) MW-1604D No n/a NP 8 0.0003741 0.0002175 sqrt(x) ShapiroWilk

Chromium, total (mg/L) MW-1604S No n/a NP 8 0.0004933 0.0006261 ln(x) ShapiroWilk

Chromium, total (mg/L) MW-1605D No n/a NP 8 0.0004718 0.0007505 ln(x) ShapiroWilk


Chromium, total (mg/L) MW-1606D No n/a NP 8 0.0004933 0.000306 x^(1/3) ShapiroWilk


Chromium, total (mg/L) MW-1607D No n/a NP 8 0.0005143 0.0006722 ln(x) ShapiroWilk


Cobalt, total (mg/L) MW-1604D No n/a NP 8 0.001775 0.0001309 x^4 ShapiroWilk

Cobalt, total (mg/L) MW-1604S No n/a NP (nrm) 8 0.0003508 0.00006763 unknown ShapiroWilk

Cobalt, total (mg/L) MW-1605D No n/a NP 8 0.00177 0.00009695 normal ShapiroWilk

Cobalt, total (mg/L) MW-1605S No n/a NP 8 0.001112 0.0008666 ln(x) ShapiroWilk

Cobalt, total (mg/L) MW-1606D No n/a NP 8 0.001906 0.001008 ln(x) ShapiroWilk

Cobalt, total (mg/L) MW-1606S No n/a NP 8 0.0003205 0.00009037 ln(x) ShapiroWilk

Cobalt, total (mg/L) MW-1607D No n/a NP 8 0.0004874 0.0001356 ln(x) ShapiroWilk

Cobalt, total (mg/L) MW-1607S No n/a NP (nrm) 8 0.003748 0.006651 unknown ShapiroWilk

Combined Radium 226 + 228 (pCi/L) MW-1604D No n/a NP 8 1.45 0.8689 ln(x) ShapiroWilk

Combined Radium 226 + 228 (pCi/L) MW-1604S Yes 0.136 NP 8 0.8541 0.7328 ln(x) ShapiroWilk


Combined Radium 226 + 228 (pCi/L) MW-1605S No n/a NP 8 1.154 0.9768 ln(x) ShapiroWilk


Combined Radium 226 + 228 (pCi/L) MW-1606S No n/a NP 8 1.311 0.4873 sqrt(x) ShapiroWilk


Combined Radium 226 + 228 (pCi/L) MW-1607S No n/a NP 8 1.855 0.6724 sqrt(x) ShapiroWilk

Fluoride, total (mg/L) MW-1604D No n/a NP 8 0.1875 0.01282 ln(x) ShapiroWilk

Fluoride, total (mg/L) MW-1604S No n/a NP 8 0.2013 0.008345 x^2 ShapiroWilk

Fluoride, total (mg/L) MW-1605D No n/a NP (nrm) 8 0.19 0.01195 unknown ShapiroWilk

Fluoride, total (mg/L) MW-1605S No n/a NP 8 0.2425 0.01282 x^6 ShapiroWilk


Fluoride, total (mg/L) MW-1606S No n/a NP (nrm) 8 0.4713 0.04454 unknown ShapiroWilk


Fluoride, total (mg/L) MW-1607S No n/a NP 8 0.2988 0.02031 ln(x) ShapiroWilk

Lead, total (mg/L) MW-1604D No n/a NP 8 0.000106 0.0001952 ln(x) ShapiroWilk

Lead, total (mg/L) MW-1604S No n/a NP 8 0.00008138 0.00003627 sqrt(x) ShapiroWilk


Lead, total (mg/L) MW-1605S No n/a NP 8 0.000676 0.0006381 ln(x) ShapiroWilk





Lithium, total (mg/L) MW-1604D No n/a NP 8 0.0545 0.006071 normal ShapiroWilk

Lithium, total (mg/L) MW-1604S No n/a NP 8 0.03488 0.005939 x^3 ShapiroWilk

Lithium, total (mg/L) MW-1605D No n/a NP 8 0.077 0.00754 x^4 ShapiroWilk

Lithium, total (mg/L) MW-1605S No n/a NP 8 0.0755 0.006887 ln(x) ShapiroWilk

Lithium, total (mg/L) MW-1606D No n/a NP 8 0.1216 0.008798 x^6 ShapiroWilk




Page 3

Lithium, total (mg/L) MW-1607D No n/a NP 8 0.07813 0.008357 ln(x) ShapiroWilk


Mercury, total (mg/L) MW-1604D No n/a NP (nrm) 8 0.000008625 0.00001108 unknown ShapiroWilk

Mercury, total (mg/L) MW-1604S No n/a NP (nrm) 8 0.00000475 7.1e-7 unknown ShapiroWilk


Mercury, total (mg/L) MW-1605S No n/a NP (nrm) 8 0.00000475 7.1e-7 unknown ShapiroWilk

Mercury, total (mg/L) MW-1606D No n/a NP (nrm) 8 0.000004875 3.5e-7 unknown ShapiroWilk

Mercury, total (mg/L) MW-1606S No n/a NP (nrm) 8 0.000004625 0.000001061 unknown ShapiroWilk


Mercury, total (mg/L) MW-1607S Yes 0.000012 NP (nrm) 8 0.000005375 0.000002825 unknown ShapiroWilk

Molybdenum, total (mg/L) MW-1604D No n/a NP 8 0.01875 0.001278 ln(x) ShapiroWilk

Molybdenum, total (mg/L) MW-1604S Yes 0.0032 NP 8 0.002614 0.0002517 ln(x) ShapiroWilk

Molybdenum, total (mg/L) MW-1605D No n/a NP 8 0.04874 0.004563 ln(x) ShapiroWilk

Molybdenum, total (mg/L) MW-1605S No n/a NP 8 0.02034 0.003609 ln(x) ShapiroWilk

Molybdenum, total (mg/L) MW-1606D No n/a NP 8 0.07801 0.004078 x^6 ShapiroWilk

Molybdenum, total (mg/L) MW-1606S No n/a NP 8 0.09831 0.009135 ln(x) ShapiroWilk

Molybdenum, total (mg/L) MW-1607D No n/a NP 8 0.08929 0.004262 x^3 ShapiroWilk

Molybdenum, total (mg/L) MW-1607S No n/a NP 8 0.04554 0.003724 x^6 ShapiroWilk

pH, field (SU) MW-1604D No n/a NP 8 7.366 0.2368 ln(x) ShapiroWilk

pH, field (SU) MW-1604S No n/a NP 8 7.19 0.2657 ln(x) ShapiroWilk


pH, field (SU) MW-1605S No n/a NP 8 7.406 0.2476 ln(x) ShapiroWilk


pH, field (SU) MW-1606S No n/a NP 8 7.131 0.508 x^6 ShapiroWilk

pH, field (SU) MW-1607D Yes 6.9,8.41 NP 8 7.656 0.4084 normal ShapiroWilk

pH, field (SU) MW-1607S Yes 8.23 NP 8 7.629 0.2556 ln(x) ShapiroWilk

Selenium, total (mg/L) MW-1604D No n/a NP 8 0.0007875 0.0001727 normal ShapiroWilk

Selenium, total (mg/L) MW-1604S No n/a NP 8 0.002363 0.000434 sqrt(x) ShapiroWilk

Selenium, total (mg/L) MW-1605D No n/a NP (nrm) 8 0.0002375 0.0000744 unknown ShapiroWilk

Selenium, total (mg/L) MW-1605S No n/a NP 8 0.0014 0.0007387 ln(x) ShapiroWilk

Selenium, total (mg/L) MW-1606D No n/a NP 8 0.004488 0.001859 sqrt(x) ShapiroWilk

Selenium, total (mg/L) MW-1606S No n/a NP 8 0.0008875 0.0001642 ln(x) ShapiroWilk

Selenium, total (mg/L) MW-1607D No n/a NP 8 0.0001063 0.000161 ln(x) ShapiroWilk

Selenium, total (mg/L) MW-1607S No n/a NP (nrm) 8 0.008638 0.0009956 unknown ShapiroWilk

Sulfate, total (mg/L) MW-1604D No n/a NP 8 839 26.82 ln(x) ShapiroWilk

Sulfate, total (mg/L) MW-1604S No n/a NP 8 656.5 42.99 ln(x) ShapiroWilk

Sulfate, total (mg/L) MW-1605D No n/a NP (nrm) 8 1270 142.8 unknown ShapiroWilk

Sulfate, total (mg/L) MW-1605S No n/a NP 8 1067 71.46 sqrt(x) ShapiroWilk

Sulfate, total (mg/L) MW-1606D No n/a NP 8 725.5 139.9 x^6 ShapiroWilk

Sulfate, total (mg/L) MW-1606S No n/a NP 8 617.5 23.24 x^6 ShapiroWilk

Sulfate, total (mg/L) MW-1607D No n/a NP 8 379.8 54.24 normal ShapiroWilk

Sulfate, total (mg/L) MW-1607S No n/a NP 8 228.1 12.45 ln(x) ShapiroWilk

Thallium, total (mg/L) MW-1604D No n/a NP 8 0.0002604 0.00003713 ln(x) ShapiroWilk

Thallium, total (mg/L) MW-1604S No n/a NP 8 0.00003863 0.00003322 ln(x) ShapiroWilk





Thallium, total (mg/L) MW-1607D No n/a NP 8 0.000039 0.00001402 normal ShapiroWilk

Thallium, total (mg/L) MW-1607S Yes 0.00015 NP 8 0.00006738 0.00003405 ln(x) ShapiroWilk

Total Dissolved Solids [TDS] (mg/L) MW-1604D No n/a NP 8 1620 32.07 x^6 ShapiroWilk

Total Dissolved Solids [TDS] (mg/L) MW-1604S No n/a NP 8 1394 89.11 x^2 ShapiroWilk

Total Dissolved Solids [TDS] (mg/L) MW-1605D No n/a NP (nrm) 8 2360 144.4 unknown ShapiroWilk

Total Dissolved Solids [TDS] (mg/L) MW-1605S No n/a NP 8 2091 132.7 x^6 ShapiroWilk

Total Dissolved Solids [TDS] (mg/L) MW-1606D No n/a NP 8 1699 20.31 ln(x) ShapiroWilk



Page 4

Total Dissolved Solids [TDS] (mg/L) MW-1606S Yes 3230 NP 8 1709 615.9 ln(x) ShapiroWilk

Total Dissolved Solids [TDS] (mg/L) MW-1607D No n/a NP 8 906.3 95.15 normal ShapiroWilk

Total Dissolved Solids [TDS] (mg/L) MW-1607S No n/a NP 8 708.5 27.77 ln(x) ShapiroWilk


0

0.00002

0.00004

0.00006

0.00008

0.0001

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17

Tukey's Outlier Screening, Pooled BackgroundMW-1601A,MW-1602,MW-1603,MW-1608

Constituent: Antimony, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32

No outliers found.Tukey's method used inlieu of parametric testbecause the Shapiro Wilknormality test failedat the 0.05 alpha level.

Data were natural logtransformed to achievebest W statistic (graphshown in original units).

High cutoff = 0.00032,low cutoff = 0.0000025,based on IQR multiplierof 3.

0

0.00018

0.00036

0.00054

0.00072

0.0009

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Arsenic, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32




0

0.012

0.024

0.036

0.048

0.06

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Barium, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32




0

0.000004

0.000008

0.000012

0.000016

0.00002

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Beryllium, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32


Ladder of Powers trans-formations did not im-prove normality; analy-sis run on raw data.

The results were invalid-ated, because the lowerand upper quartiles areequal.

0

0.16

0.32

0.48

0.64

0.8

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Boron, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32

No outliers found.Tukey's method select-ed by user.


High cutoff = 3.878, lowcutoff = 0.01239, basedon IQR multiplier of 3.

0

0.000006

0.000012

0.000018

0.000024

0.00003

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Cadmium, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32




0

40

80

120

160

200

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Calcium, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32




0

16

32

48

64

80

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Chloride, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32




0

0.0006

0.0012

0.0018

0.0024

0.003

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Chromium, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32




0

0.0004

0.0008

0.0012

0.0016

0.002

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Cobalt, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32




0

0.6

1.2

1.8

2.4

3

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Combined Radium 226 + 228 Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Scree



pCi/L

n = 32




0

0.06

0.12

0.18

0.24

0.3

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Fluoride, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32



High cutoff = 0.415, lowcutoff = -0.075, basedon IQR multiplier of 3.

0

0.00018

0.00036

0.00054

0.00072

0.0009

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Lead, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32




0

0.006

0.012

0.018

0.024

0.03

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Lithium, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32


Data were square roottransformed to achievebest W statistic (graphshown in original units).


0

0.000001

0.000002

0.000003

0.000004

0.000005

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Mercury, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32




0

0.0006

0.0012

0.0018

0.0024

0.003

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Molybdenum, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32



High cutoff = 0.01062,low cutoff = -0.0009915,based on IQR multiplierof 3.

0

1.6

3.2

4.8

6.4

8

9/26/16 11/16/16 1/7/17 2/28/17 4/21/17 6/12/17


Constituent: pH, field Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



SU

n = 32




0

0.0004

0.0008

0.0012

0.0016

0.002

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Selenium, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32


Data were square trans-formed to achieve bestW statistic (graph shownin original units).


0

120

240

360

480

600

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Sulfate, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32



High cutoff = 4225, lowcutoff = 10.67, basedon IQR multiplier of 3.

0

0.00004

0.00008

0.00012

0.00016

0.0002

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Thallium, total Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screening



mg/

L

n = 32


Data were cube root trans-formed to achieve bestW statistic (graph shownin original units).

High cutoff = 0.0003058,low cutoff = -2.8e-8,based on IQR multiplierof 3.

0

200

400

600

800

1000

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Total Dissolved Solids [TDS] Analysis Run 12/27/2017 6:26 PM View: Tukey's Outlier Screeni



mg/

L

n = 32




0

0.00004

0.00008

0.00012

0.00016

0.0002

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17

Tukey's Outlier ScreeningMW-1604D




mg/

L

n = 8




0

0.000008

0.000016

0.000024

0.000032

0.00004

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17

Tukey's Outlier ScreeningMW-1604S




mg/

L

n = 8




0

0.000008

0.000016

0.000024

0.000032

0.00004

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8


Data were cube transform-ed to achieve best W stat-istic (graph shown inoriginal units).


0

0.00004

0.00008

0.00012

0.00016

0.0002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00006

0.00012

0.00018

0.00024

0.0003

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8


Data were x^4 transform-ed to achieve best W stat-istic (graph shown inoriginal units).


0

0.00001

0.00002

0.00003

0.00004

0.00005

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.00018

0.00036

0.00054

0.00072

0.0009

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

0.00012

0.00024

0.00036

0.00048

0.0006

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00012

0.00024

0.00036

0.00048

0.0006

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0006

0.0012

0.0018

0.0024

0.003

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0004

0.0008

0.0012

0.0016

0.002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0004

0.0008

0.0012

0.0016

0.002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0002

0.0004

0.0006

0.0008

0.001

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0004

0.0008

0.0012

0.0016

0.002

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.004

0.008

0.012

0.016

0.02

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8

Outlier is drawn as solid.Tukey's method select-ed by user.



0

0.008

0.016

0.024

0.032

0.04

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8



High cutoff = 0.0329,low cutoff = 0.0238, basedon IQR multiplier of 3.

0

0.008

0.016

0.024

0.032

0.04

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.008

0.016

0.024

0.032

0.04

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.01

0.02

0.03

0.04

0.05

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.014

0.028

0.042

0.056

0.07

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.016

0.032

0.048

0.064

0.08

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.04

0.08

0.12

0.16

0.2

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.04

0.08

0.12

0.16

0.2

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

0.22

0.44

0.66

0.88

1.1

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.22

0.44

0.66

0.88

1.1

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.22

0.44

0.66

0.88

1.1

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000008

0.000016

0.000024

0.000032

0.00004

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000008

0.000016

0.000024

0.000032

0.00004

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8



The results were invalid-ated, because both thelower and upper quartilesrepresent reporting limits.

0

0.22

0.44

0.66

0.88

1.1

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000004

0.000008

0.000012

0.000016

0.00002

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

1

2

3

4

5

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

1

2

3

4

5

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

4

8

12

16

20

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

4

8

12

16

20

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

1.4

2.8

4.2

5.6

7

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

1.4

2.8

4.2

5.6

7

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.4

0.8

1.2

1.6

2

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8



High cutoff = 2.072, lowcutoff = 1.15, based onIQR multiplier of 3.

0

0.4

0.8

1.2

1.6

2

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000008

0.000016

0.000024

0.000032

0.00004

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000008

0.000016

0.000024

0.000032

0.00004

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000016

0.000032

0.000048

0.000064

0.00008

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000018

0.000036

0.000054

0.000072

0.00009

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000006

0.000012

0.000018

0.000024

0.00003

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8



The results were invalid-ated, because both thelower and upper quartilesrepresent reporting limits.

0

0.00006

0.00012

0.00018

0.00024

0.0003

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

80

160

240

320

400

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

60

120

180

240

300

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

100

200

300

400

500

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

60

120

180

240

300

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

60

120

180

240

300

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

60

120

180

240

300

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

40

80

120

160

200

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

40

80

120

160

200

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

40

80

120

160

200

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

40

80

120

160

200

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

40

80

120

160

200

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

60

120

180

240

300

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

60

120

180

240

300

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8



High cutoff = 248, lowcutoff = -214, based onIQR multiplier of 3.

0

60

120

180

240

300

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

40

80

120

160

200

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8

Outliers are drawn assolid.Tukey's method select-ed by user.



0

20

40

60

80

100

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

0.00016

0.00032

0.00048

0.00064

0.0008

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0004

0.0008

0.0012

0.0016

0.002

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0006

0.0012

0.0018

0.0024

0.003

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0006

0.0012

0.0018

0.0024

0.003

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00018

0.00036

0.00054

0.00072

0.0009

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0004

0.0008

0.0012

0.0016

0.002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0006

0.0012

0.0018

0.0024

0.003

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8



High cutoff = 0.1356,low cutoff = 5.2e-7, basedon IQR multiplier of 3.

0

0.0008

0.0016

0.0024

0.0032

0.004

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

0.0004

0.0008

0.0012

0.0016

0.002

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00012

0.00024

0.00036

0.00048

0.0006

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0004

0.0008

0.0012

0.0016

0.002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0008

0.0016

0.0024

0.0032

0.004

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.001

0.002

0.003

0.004

0.005

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0001

0.0002

0.0003

0.0004

0.0005

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00018

0.00036

0.00054

0.00072

0.0009

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.006

0.012

0.018

0.024

0.03

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

0.8

1.6

2.4

3.2

4

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





pCi/L

n = 8




0

0.6

1.2

1.8

2.4

3

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





pCi/L

n = 8




0

0.8

1.6

2.4

3.2

4

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





pCi/L

n = 8




0

0.6

1.2

1.8

2.4

3

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





pCi/L

n = 8




0

1.8

3.6

5.4

7.2

9

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





pCi/L

n = 8




0

0.6

1.2

1.8

2.4

3

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





pCi/L

n = 8




0

0.8

1.6

2.4

3.2

4

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





pCi/L

n = 8




0

0.6

1.2

1.8

2.4

3

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





pCi/L

n = 8




0

0.06

0.12

0.18

0.24

0.3

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.06

0.12

0.18

0.24

0.3

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.04

0.08

0.12

0.16

0.2

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.06

0.12

0.18

0.24

0.3

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.06

0.12

0.18

0.24

0.3

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.12

0.24

0.36

0.48

0.6

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.14

0.28

0.42

0.56

0.7

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.08

0.16

0.24

0.32

0.4

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

0.00012

0.00024

0.00036

0.00048

0.0006

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000016

0.000032

0.000048

0.000064

0.00008

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0006

0.0012

0.0018

0.0024

0.003

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0006

0.0012

0.0018

0.0024

0.003

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00006

0.00012

0.00018

0.00024

0.0003

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00014

0.00028

0.00042

0.00056

0.0007

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.004

0.008

0.012

0.016

0.02

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

0.014

0.028

0.042

0.056

0.07

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.01

0.02

0.03

0.04

0.05

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.018

0.036

0.054

0.072

0.09

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.018

0.036

0.054

0.072

0.09

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.04

0.08

0.12

0.16

0.2

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.04

0.08

0.12

0.16

0.2

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.018

0.036

0.054

0.072

0.09

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.04

0.08

0.12

0.16

0.2

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

0.000008

0.000016

0.000024

0.000032

0.00004

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000001

0.000002

0.000003

0.000004

0.000005

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000001

0.000002

0.000003

0.000004

0.000005

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000001

0.000002

0.000003

0.000004

0.000005

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000001

0.000002

0.000003

0.000004

0.000005

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000001

0.000002

0.000003

0.000004

0.000005

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000001

0.000002

0.000003

0.000004

0.000005

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.000004

0.000008

0.000012

0.000016

0.00002

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8

Outlier is drawn as solid.Tukey's method used inlieu of parametric testbecause the Shapiro Wilknormality test failedat the 0.05 alpha level.



0

0.006

0.012

0.018

0.024

0.03

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0008

0.0016

0.0024

0.0032

0.004

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.012

0.024

0.036

0.048

0.06

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.006

0.012

0.018

0.024

0.03

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.018

0.036

0.054

0.072

0.09

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.04

0.08

0.12

0.16

0.2

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.02

0.04

0.06

0.08

0.1

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.012

0.024

0.036

0.048

0.06

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

1.6

3.2

4.8

6.4

8

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





SU

n = 8




0

1.6

3.2

4.8

6.4

8

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





SU

n = 8




0

1.6

3.2

4.8

6.4

8

9/27/16 11/12/16 12/28/16 2/12/17 3/30/17 5/16/17





SU

n = 7




0

1.6

3.2

4.8

6.4

8

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





SU

n = 8




0

1.6

3.2

4.8

6.4

8

9/27/16 11/19/16 1/12/17 3/7/17 4/30/17 6/23/17





SU

n = 8




0

1.6

3.2

4.8

6.4

8

9/27/16 11/19/16 1/12/17 3/7/17 4/30/17 6/23/17





SU

n = 8




0

1.8

3.6

5.4

7.2

9

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





SU

n = 8

Outliers are drawn assolid.Tukey's method select-ed by user.



0

1.8

3.6

5.4

7.2

9

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





SU

n = 8




0

0.0002

0.0004

0.0006

0.0008

0.001

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0008

0.0016

0.0024

0.0032

0.004

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00008

0.00016

0.00024

0.00032

0.0004

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0006

0.0012

0.0018

0.0024

0.003

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0018

0.0036

0.0054

0.0072

0.009

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0004

0.0008

0.0012

0.0016

0.002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.0001

0.0002

0.0003

0.0004

0.0005

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.002

0.004

0.006

0.008

0.01

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

180

360

540

720

900

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

160

320

480

640

800

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

400

800

1200

1600

2000

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

400

800

1200

1600

2000

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

180

360

540

720

900

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

140

280

420

560

700

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

100

200

300

400

500

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8



High cutoff = 548, lowcutoff = 212, based onIQR multiplier of 3.

0

60

120

180

240

300

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8



High cutoff = 314.3, lowcutoff = 165, based onIQR multiplier of 3.

0

0.00008

0.00016

0.00024

0.00032

0.0004

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

9/26/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.00002

0.00004

0.00006

0.00008

0.0001

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

0.000014

0.000028

0.000042

0.000056

0.00007

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

0.00004

0.00008

0.00012

0.00016

0.0002

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17





mg/

L

n = 8




0

400

800

1200

1600

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mg/

L

n = 8




0

400

800

1200

1600

2000

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mg/

L

n = 8




0

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1200

1800

2400

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mg/

L

n = 8




0

600

1200

1800

2400

3000

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8



High cutoff = 2550, lowcutoff = -2182, basedon IQR multiplier of 3.

0

400

800

1200

1600

2000

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17





mg/

L

n = 8




0

800

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3200

4000

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mg/

L

n = 8




0

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440

660

880

1100

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17





mg/

L

n = 8




0

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320

480

640

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mg/

L

n = 8




Constituent Well Slope Calc. Critical Sig. N %NDs Normality Xform Alpha Method

Barium, total (mg/L) MW-1605S -0.01392 -24 -21 Yes 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1608 (bg) -0.00002607 -24 -21 Yes 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1603 (bg) 68.26 22 21 Yes 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1607S 15.52 24 21 Yes 8 0 n/a n/a 0.01 NP

Chloride, total (mg/L) MW-1601A (bg) 75.87 22 21 Yes 8 0 n/a n/a 0.01 NP

Chloride, total (mg/L) MW-1605S 68.44 22 21 Yes 8 0 n/a n/a 0.01 NP

Chromium, total (mg/L) MW-1601A (bg) -0.0003014 -22 -21 Yes 8 0 n/a n/a 0.01 NP

Cobalt, total (mg/L) MW-1608 (bg) -0.001173 -22 -21 Yes 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1608 (bg) -0.09815 -25 -21 Yes 8 0 n/a n/a 0.01 NP

Lead, total (mg/L) MW-1608 (bg) -0.0008095 -22 -21 Yes 8 0 n/a n/a 0.01 NP

Lead, total (mg/L) MW-1605D -0.0000523 -23 -21 Yes 8 0 n/a n/a 0.01 NP

Lithium, total (mg/L) MW-1607D 0.02991 23 21 Yes 8 0 n/a n/a 0.01 NP

Sulfate, total (mg/L) MW-1601A (bg) 67.44 22 21 Yes 8 0 n/a n/a 0.01 NP

Sulfate, total (mg/L) MW-1602 (bg) 156.6 26 21 Yes 8 0 n/a n/a 0.01 NP

Total Dissolved Solids [TDS] (mg/L) MW-1602 (bg) 248 26 21 Yes 8 0 n/a n/a 0.01 NP

Total Dissolved Solids [TDS] (mg/L) MW-1605D -464.7 -22 -21 Yes 8 0 n/a n/a 0.01 NP

Trend Tests Summary Table - Significant ResultsMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 11/25/2017, 10:50 AM


Antimony, total (mg/L) MW-1601A (bg) -0.00001507 -9 -21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1602 (bg) 0 4 21 No 8 12.5 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1603 (bg) 0.00001507 11 21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1608 (bg) -0.00001861 -11 -21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1604D -0.000007866 -3 -21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1604S 0 -10 -21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1605D 0 7 21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1605S -0.00005345 -14 -21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1606D 0 -4 -21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1606S 0 -4 -21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1607D 0 -5 -21 No 8 0 n/a n/a 0.01 NP

Antimony, total (mg/L) MW-1607S 0.00004059 2 21 No 8 0 n/a n/a 0.01 NP

Arsenic, total (mg/L) MW-1601A (bg) -0.000007101 -1 -21 No 8 0 n/a n/a 0.01 NP

Arsenic, total (mg/L) MW-1602 (bg) 0 0 21 No 8 0 n/a n/a 0.01 NP

Arsenic, total (mg/L) MW-1603 (bg) 0.00001259 3 21 No 8 0 n/a n/a 0.01 NP

Arsenic, total (mg/L) MW-1608 (bg) -0.0003641 -21 -21 No 8 0 n/a n/a 0.01 NP

Arsenic, total (mg/L) MW-1604D -0.0000838 -6 -21 No 8 0 n/a n/a 0.01 NP

Arsenic, total (mg/L) MW-1604S 0.00004446 3 21 No 8 0 n/a n/a 0.01 NP


Arsenic, total (mg/L) MW-1605S -0.0003926 -15 -21 No 8 0 n/a n/a 0.01 NP



Arsenic, total (mg/L) MW-1607D 0.00013 3 21 No 8 0 n/a n/a 0.01 NP


Barium, total (mg/L) MW-1601A (bg) 0.004584 10 21 No 8 0 n/a n/a 0.01 NP

Barium, total (mg/L) MW-1602 (bg) 0.008641 20 21 No 8 0 n/a n/a 0.01 NP



Barium, total (mg/L) MW-1604D -0.001911 -11 -21 No 8 0 n/a n/a 0.01 NP

Barium, total (mg/L) MW-1604S 0.004026 6 21 No 8 0 n/a n/a 0.01 NP


Barium, total (mg/L) MW-1605S -0.01392 -24 -21 Yes 8 0 n/a n/a 0.01 NP





Beryllium, total (mg/L) MW-1601A (bg) 0 0 21 No 8 100 n/a n/a 0.01 NP

Beryllium, total (mg/L) MW-1602 (bg) 0 0 21 No 8 100 n/a n/a 0.01 NP

Beryllium, total (mg/L) MW-1603 (bg) 0 -3 -21 No 8 87.5 n/a n/a 0.01 NP

Beryllium, total (mg/L) MW-1608 (bg) 0 3 21 No 8 75 n/a n/a 0.01 NP

Beryllium, total (mg/L) MW-1604D 0 0 21 No 8 100 n/a n/a 0.01 NP

Beryllium, total (mg/L) MW-1604S 0 0 21 No 8 100 n/a n/a 0.01 NP

Beryllium, total (mg/L) MW-1605D 0 0 21 No 8 100 n/a n/a 0.01 NP

Beryllium, total (mg/L) MW-1605S 0.00001409 10 21 No 8 62.5 n/a n/a 0.01 NP

Beryllium, total (mg/L) MW-1606D 0 2 21 No 8 62.5 n/a n/a 0.01 NP


Beryllium, total (mg/L) MW-1607D 0 -1 -21 No 8 87.5 n/a n/a 0.01 NP


Boron, total (mg/L) MW-1601A (bg) 0.1054 14 21 No 8 0 n/a n/a 0.01 NP

Boron, total (mg/L) MW-1602 (bg) 0.008521 1 21 No 8 0 n/a n/a 0.01 NP



Boron, total (mg/L) MW-1604D -0.2584 -11 -21 No 8 0 n/a n/a 0.01 NP

Boron, total (mg/L) MW-1604S 2.482 14 21 No 8 0 n/a n/a 0.01 NP

Boron, total (mg/L) MW-1605D -1.831 -18 -21 No 8 0 n/a n/a 0.01 NP

Trend Tests Summary Table - All ResultsMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 11/25/2017, 10:50 AM


Page 2


Boron, total (mg/L) MW-1606D 2.342 14 21 No 8 0 n/a n/a 0.01 NP


Boron, total (mg/L) MW-1607D 0.04148 1 21 No 8 0 n/a n/a 0.01 NP


Cadmium, total (mg/L) MW-1601A (bg) 0 3 21 No 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1602 (bg) 0 -6 -21 No 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1603 (bg) 0 -7 -21 No 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1608 (bg) -0.00002607 -24 -21 Yes 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1604D -0.00005232 -10 -21 No 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1604S 0 6 21 No 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1605D -0.00002491 -12 -21 No 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1605S 0 -7 -21 No 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1606D 0.000007046 7 21 No 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1606S 0 1 21 No 8 0 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1607D 0 3 21 No 8 50 n/a n/a 0.01 NP

Cadmium, total (mg/L) MW-1607S -0.00004067 -10 -21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1601A (bg) 19.12 5 21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1602 (bg) 39.5 16 21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1603 (bg) 68.26 22 21 Yes 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1608 (bg) 26.25 10 21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1604D -10.98 -2 -21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1604S 33.87 16 21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1605D -47.5 -4 -21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1605S -5.857 -2 -21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1606D 10.27 3 21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1606S 62.94 19 21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1607D 11.95 4 21 No 8 0 n/a n/a 0.01 NP

Calcium, total (mg/L) MW-1607S 15.52 24 21 Yes 8 0 n/a n/a 0.01 NP

Chloride, total (mg/L) MW-1601A (bg) 75.87 22 21 Yes 8 0 n/a n/a 0.01 NP

Chloride, total (mg/L) MW-1602 (bg) 6.698 20 21 No 8 0 n/a n/a 0.01 NP

Chloride, total (mg/L) MW-1603 (bg) -3.792 -2 -21 No 8 0 n/a n/a 0.01 NP

Chloride, total (mg/L) MW-1608 (bg) 3.542 12 21 No 8 0 n/a n/a 0.01 NP

Chloride, total (mg/L) MW-1604D 0.7866 3 21 No 8 0 n/a n/a 0.01 NP

Chloride, total (mg/L) MW-1604S 44.07 19 21 No 8 0 n/a n/a 0.01 NP


Chloride, total (mg/L) MW-1605S 68.44 22 21 Yes 8 0 n/a n/a 0.01 NP



Chloride, total (mg/L) MW-1607D -0.9359 -1 -21 No 8 0 n/a n/a 0.01 NP


Chromium, total (mg/L) MW-1601A (bg) -0.0003014 -22 -21 Yes 8 0 n/a n/a 0.01 NP

Chromium, total (mg/L) MW-1602 (bg) -0.0002398 -6 -21 No 8 0 n/a n/a 0.01 NP

Chromium, total (mg/L) MW-1603 (bg) 0.0004257 8 21 No 8 0 n/a n/a 0.01 NP

Chromium, total (mg/L) MW-1608 (bg) -0.0009433 -20 -21 No 8 0 n/a n/a 0.01 NP

Chromium, total (mg/L) MW-1604D -0.0005132 -14 -21 No 8 0 n/a n/a 0.01 NP

Chromium, total (mg/L) MW-1604S -0.0002764 -10 -21 No 8 0 n/a n/a 0.01 NP







Cobalt, total (mg/L) MW-1601A (bg) -0.00001041 0 21 No 8 0 n/a n/a 0.01 NP

Cobalt, total (mg/L) MW-1602 (bg) -0.0001257 -10 -21 No 8 0 n/a n/a 0.01 NP



Page 3

Cobalt, total (mg/L) MW-1603 (bg) -0.0001422 -16 -21 No 8 0 n/a n/a 0.01 NP

Cobalt, total (mg/L) MW-1608 (bg) -0.001173 -22 -21 Yes 8 0 n/a n/a 0.01 NP

Cobalt, total (mg/L) MW-1604D -0.00006961 -3 -21 No 8 0 n/a n/a 0.01 NP

Cobalt, total (mg/L) MW-1604S -0.00006212 -4 -21 No 8 0 n/a n/a 0.01 NP







Combined Radium 226 + 228 (pCi/L) MW-1601A (bg) -0.09858 0 21 No 8 0 n/a n/a 0.01 NP

Combined Radium 226 + 228 (pCi/L) MW-1602 (bg) -0.317 -4 -21 No 8 0 n/a n/a 0.01 NP

Combined Radium 226 + 228 (pCi/L) MW-1603 (bg) 0.8412 4 21 No 8 0 n/a n/a 0.01 NP

Combined Radium 226 + 228 (pCi/L) MW-1608 (bg) -0.6751 -10 -21 No 8 0 n/a n/a 0.01 NP

Combined Radium 226 + 228 (pCi/L) MW-1604D 0.2721 4 21 No 8 0 n/a n/a 0.01 NP

Combined Radium 226 + 228 (pCi/L) MW-1604S 0.151 3 18 No 7 0 n/a n/a 0.01 NP

Combined Radium 226 + 228 (pCi/L) MW-1605D -0.7595 -6 -21 No 8 0 n/a n/a 0.01 NP


Combined Radium 226 + 228 (pCi/L) MW-1606D -3.769 -14 -21 No 8 0 n/a n/a 0.01 NP


Combined Radium 226 + 228 (pCi/L) MW-1607D 0.1063 2 21 No 8 0 n/a n/a 0.01 NP

Combined Radium 226 + 228 (pCi/L) MW-1607S -1.358 -10 -21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1601A (bg) 0 0 21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1602 (bg) 0.0389 21 21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1603 (bg) 0 13 21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1608 (bg) -0.09815 -25 -21 Yes 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1604D 0 0 21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1604S 0 -3 -21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1605D 0 5 21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1605S 0.009311 4 21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1606D 0 -3 -21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1606S -0.08551 -18 -21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1607D -0.03793 -9 -21 No 8 0 n/a n/a 0.01 NP

Fluoride, total (mg/L) MW-1607S -0.0646 -15 -21 No 8 0 n/a n/a 0.01 NP

Lead, total (mg/L) MW-1601A (bg) -0.0001098 -8 -21 No 8 0 n/a n/a 0.01 NP

Lead, total (mg/L) MW-1602 (bg) -0.00008826 -8 -21 No 8 0 n/a n/a 0.01 NP

Lead, total (mg/L) MW-1603 (bg) -0.00009935 -14 -21 No 8 0 n/a n/a 0.01 NP

Lead, total (mg/L) MW-1608 (bg) -0.0008095 -22 -21 Yes 8 0 n/a n/a 0.01 NP

Lead, total (mg/L) MW-1604D 0.000003724 1 21 No 8 0 n/a n/a 0.01 NP

Lead, total (mg/L) MW-1604S -0.00009723 -12 -21 No 8 0 n/a n/a 0.01 NP

Lead, total (mg/L) MW-1605D -0.0000523 -23 -21 Yes 8 0 n/a n/a 0.01 NP


Lead, total (mg/L) MW-1606D -0.0003947 -10 -21 No 8 0 n/a n/a 0.01 NP


Lead, total (mg/L) MW-1607D 0.000003724 1 21 No 8 0 n/a n/a 0.01 NP


Lithium, total (mg/L) MW-1601A (bg) 0.005584 7 21 No 8 25 n/a n/a 0.01 NP

Lithium, total (mg/L) MW-1602 (bg) 0.006552 7 21 No 8 0 n/a n/a 0.01 NP

Lithium, total (mg/L) MW-1603 (bg) -0.0008221 -2 -21 No 8 0 n/a n/a 0.01 NP

Lithium, total (mg/L) MW-1608 (bg) 0.01083 18 21 No 8 12.5 n/a n/a 0.01 NP

Lithium, total (mg/L) MW-1604D 0.004016 2 21 No 8 0 n/a n/a 0.01 NP

Lithium, total (mg/L) MW-1604S 0.007877 5 21 No 8 0 n/a n/a 0.01 NP

Lithium, total (mg/L) MW-1605D -0.00009007 0 21 No 8 0 n/a n/a 0.01 NP

Lithium, total (mg/L) MW-1605S -0.02046 -15 -21 No 8 0 n/a n/a 0.01 NP

Lithium, total (mg/L) MW-1606D 0.008484 6 21 No 8 0 n/a n/a 0.01 NP



Page 4


Lithium, total (mg/L) MW-1607D 0.02991 23 21 Yes 8 0 n/a n/a 0.01 NP


Mercury, total (mg/L) MW-1601A (bg) 0 -3 -21 No 8 87.5 n/a n/a 0.01 NP

Mercury, total (mg/L) MW-1602 (bg) 0 -3 -21 No 8 87.5 n/a n/a 0.01 NP



Mercury, total (mg/L) MW-1604D 0 -7 -21 No 8 75 n/a n/a 0.01 NP

Mercury, total (mg/L) MW-1604S 0 -3 -21 No 8 87.5 n/a n/a 0.01 NP

Mercury, total (mg/L) MW-1605D 0 -3 -21 No 8 87.5 n/a n/a 0.01 NP


Mercury, total (mg/L) MW-1606D 0 -3 -21 No 8 87.5 n/a n/a 0.01 NP


Mercury, total (mg/L) MW-1607D 0 -4 -21 No 8 75 n/a n/a 0.01 NP

Mercury, total (mg/L) MW-1607S 0 1 21 No 8 62.5 n/a n/a 0.01 NP

Molybdenum, total (mg/L) MW-1601A (bg) -0.001374 -6 -21 No 8 0 n/a n/a 0.01 NP

Molybdenum, total (mg/L) MW-1602 (bg) -0.0003501 -4 -21 No 8 0 n/a n/a 0.01 NP



Molybdenum, total (mg/L) MW-1604D -0.002722 -7 -21 No 8 0 n/a n/a 0.01 NP

Molybdenum, total (mg/L) MW-1604S 0 0 18 No 7 0 n/a n/a 0.01 NP


Molybdenum, total (mg/L) MW-1605S -0.01066 -16 -21 No 8 0 n/a n/a 0.01 NP





pH, field (SU) MW-1601A (bg) -0.4537 -14 -21 No 8 0 n/a n/a 0.01 NP

pH, field (SU) MW-1602 (bg) -0.2725 -2 -21 No 8 0 n/a n/a 0.01 NP

pH, field (SU) MW-1603 (bg) 0.1521 4 21 No 8 0 n/a n/a 0.01 NP

pH, field (SU) MW-1608 (bg) -0.7379 -12 -21 No 8 0 n/a n/a 0.01 NP

pH, field (SU) MW-1604D 0.2832 4 21 No 8 0 n/a n/a 0.01 NP

pH, field (SU) MW-1604S 0.6573 5 21 No 8 0 n/a n/a 0.01 NP

pH, field (SU) MW-1605D 0 0 18 No 7 0 n/a n/a 0.01 NP


pH, field (SU) MW-1606D 0.2765 5 18 No 7 0 n/a n/a 0.01 NP


pH, field (SU) MW-1607D -0.08075 -1 -21 No 8 0 n/a n/a 0.01 NP

pH, field (SU) MW-1607S -0.1263 -6 -18 No 7 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1601A (bg) 0.0003436 9 21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1602 (bg) 0 9 21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1603 (bg) -0.0004285 -11 -21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1608 (bg) -0.0001949 -6 -21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1604D -0.000408 -12 -21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1604S -0.001234 -14 -21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1605D 0 5 21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1605S 0.00121 12 21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1606D 0.005711 16 21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1606S -0.000247 -8 -21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1607D -0.00007754 -9 -21 No 8 0 n/a n/a 0.01 NP

Selenium, total (mg/L) MW-1607S 0.002904 11 21 No 8 0 n/a n/a 0.01 NP

Sulfate, total (mg/L) MW-1601A (bg) 67.44 22 21 Yes 8 0 n/a n/a 0.01 NP

Sulfate, total (mg/L) MW-1602 (bg) 156.6 26 21 Yes 8 0 n/a n/a 0.01 NP

Sulfate, total (mg/L) MW-1603 (bg) -13.64 -4 -21 No 8 0 n/a n/a 0.01 NP

Sulfate, total (mg/L) MW-1608 (bg) 222.3 20 21 No 8 0 n/a n/a 0.01 NP



Page 5

Sulfate, total (mg/L) MW-1604D -64.49 -12 -21 No 8 0 n/a n/a 0.01 NP

Sulfate, total (mg/L) MW-1604S 146.2 20 21 No 8 0 n/a n/a 0.01 NP

Sulfate, total (mg/L) MW-1605D -458 -19 -21 No 8 0 n/a n/a 0.01 NP

Sulfate, total (mg/L) MW-1605S -40.74 -3 -21 No 8 0 n/a n/a 0.01 NP





Thallium, total (mg/L) MW-1601A (bg) -0.00001959 -8 -21 No 8 0 n/a n/a 0.01 NP

Thallium, total (mg/L) MW-1602 (bg) -0.00007403 -10 -21 No 8 0 n/a n/a 0.01 NP

Thallium, total (mg/L) MW-1603 (bg) -0.00003511 -10 -21 No 8 12.5 n/a n/a 0.01 NP

Thallium, total (mg/L) MW-1608 (bg) -0.0000555 -12 -21 No 8 0 n/a n/a 0.01 NP

Thallium, total (mg/L) MW-1604D -0.00000722 -2 -21 No 8 0 n/a n/a 0.01 NP

Thallium, total (mg/L) MW-1604S 0 0 21 No 8 0 n/a n/a 0.01 NP


Thallium, total (mg/L) MW-1605S -0.00003163 -8 -21 No 8 0 n/a n/a 0.01 NP


Thallium, total (mg/L) MW-1606S 0.00001382 4 21 No 8 0 n/a n/a 0.01 NP


Thallium, total (mg/L) MW-1607S -0.0000149 -8 -18 No 7 0 n/a n/a 0.01 NP

Total Dissolved Solids [TDS] (mg/L) MW-1601A (bg) 80.98 16 21 No 8 0 n/a n/a 0.01 NP

Total Dissolved Solids [TDS] (mg/L) MW-1602 (bg) 248 26 21 Yes 8 0 n/a n/a 0.01 NP

Total Dissolved Solids [TDS] (mg/L) MW-1603 (bg) 71.05 7 21 No 8 0 n/a n/a 0.01 NP

Total Dissolved Solids [TDS] (mg/L) MW-1608 (bg) 172.8 16 21 No 8 0 n/a n/a 0.01 NP

Total Dissolved Solids [TDS] (mg/L) MW-1604D -23.13 -4 -21 No 8 0 n/a n/a 0.01 NP

Total Dissolved Solids [TDS] (mg/L) MW-1604S 325.9 16 21 No 8 0 n/a n/a 0.01 NP

Total Dissolved Solids [TDS] (mg/L) MW-1605D -464.7 -22 -21 Yes 8 0 n/a n/a 0.01 NP







0

0.01

0.02

0.03

0.04

0.05

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17

Sen's Slope EstimatorMW-1605S

Constituent: Barium, total Analysis Run 11/25/2017 10:44 AM View: Trend Tests



mg/

L

n = 8

Slope = -0.01392units per year.

Mann-Kendallstatistic = -24critical = -21

Decreasing trendsignificant at 99%confidence level(α = 0.005 pertail).

0

0.00004

0.00008

0.00012

0.00016

0.0002

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17

Sen's Slope EstimatorMW-1608 (bg)

Constituent: Cadmium, total Analysis Run 11/25/2017 10:45 AM View: Trend Tests



mg/

L

n = 8




0

40

80

120

160

200

9/28/16 11/18/16 1/8/17 3/1/17 4/21/17 6/12/17


Constituent: Calcium, total Analysis Run 11/25/2017 10:45 AM View: Trend Tests



mg/

L

n = 8

Slope = 68.26units per year.

Mann-Kendallstatistic = 22critical = 21

Increasing trendsignificant at 99%confidence level(α = 0.005 pertail).

0

40

80

120

160

200

10/31/16 12/15/16 1/29/17 3/15/17 4/29/17 6/14/17


Constituent: Calcium, total Analysis Run 11/25/2017 10:45 AM View: Trend Tests



mg/

L

n = 8




0

16

32

48

64

80

9/28/16 11/18/16 1/8/17 3/1/17 4/21/17 6/12/17

Sen's Slope EstimatorMW-1601A (bg)

Constituent: Chloride, total Analysis Run 11/25/2017 10:45 AM View: Trend Tests



mg/

L

n = 8




0

60

120

180

240

300

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17


Constituent: Chloride, total Analysis Run 11/25/2017 10:45 AM View: Trend Tests



mg/

L

n = 8




0

0.0012

0.0024

0.0036

0.0048

0.006

9/28/16 11/18/16 1/8/17 3/1/17 4/21/17 6/12/17


Constituent: Chromium, total Analysis Run 11/25/2017 10:45 AM View: Trend Tests



mg/

L

n = 8




0

0.001

0.002

0.003

0.004

0.005

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Cobalt, total Analysis Run 11/25/2017 10:45 AM View: Trend Tests



mg/

L

n = 8




0

0.06

0.12

0.18

0.24

0.3

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Fluoride, total Analysis Run 11/25/2017 10:46 AM View: Trend Tests



mg/

L

n = 8




0

0.0008

0.0016

0.0024

0.0032

0.004

9/27/16 11/17/16 1/8/17 2/28/17 4/21/17 6/12/17


Constituent: Lead, total Analysis Run 11/25/2017 10:46 AM View: Trend Tests



mg/

L

n = 8




0

0.00008

0.00016

0.00024

0.00032

0.0004

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17

Sen's Slope EstimatorMW-1605D

Constituent: Lead, total Analysis Run 11/25/2017 10:46 AM View: Trend Tests



mg/

L

n = 8




0

0.018

0.036

0.054

0.072

0.09

9/27/16 11/18/16 1/9/17 3/2/17 4/23/17 6/14/17


Constituent: Lithium, total Analysis Run 11/25/2017 10:46 AM View: Trend Tests



mg/

L

n = 8




0

40

80

120

160

200

9/28/16 11/18/16 1/8/17 3/1/17 4/21/17 6/12/17


Constituent: Sulfate, total Analysis Run 11/25/2017 10:46 AM View: Trend Tests



mg/

L

n = 8




0

60

120

180

240

300

9/28/16 11/18/16 1/8/17 3/1/17 4/21/17 6/12/17


Constituent: Sulfate, total Analysis Run 11/25/2017 10:46 AM View: Trend Tests



mg/

L

n = 8




0

120

240

360

480

600

9/28/16 11/18/16 1/8/17 3/1/17 4/21/17 6/12/17


Constituent: Total Dissolved Solids [TDS] Analysis Run 11/25/2017 10:47 AM View: Trend Tests



mg/

L

n = 8

Slope = 248units per year.



0

600

1200

1800

2400

3000

9/27/16 11/17/16 1/8/17 3/1/17 4/22/17 6/13/17


Constituent: Total Dissolved Solids [TDS] Analysis Run 11/25/2017 10:47 AM View: Trend Tests



mg/

L

n = 8




Constituent Crit. Sig. Alpha Transform ANOVA Sig. Calc. Alpha Method

Boron, total (mg/L) n/a n/a n/a sqrt(x) Yes 29.39 0.05 Param.

Calcium, total (mg/L) n/a n/a n/a No Yes 50.32 0.05 Param.

Chloride, total (mg/L) n/a n/a n/a No Yes 26.24 0.05 NP (eq. var.)

Fluoride, total (mg/L) n/a n/a n/a sqrt(x) Yes 143.3 0.05 Param.

pH, field (SU) n/a n/a n/a No Yes 3.655 0.05 Param.

Sulfate, total (mg/L) n/a n/a n/a No Yes 22.83 0.05 NP (eq. var.)

Total Dissolved Solids [TDS] (mg/L) n/a n/a n/a sqrt(x) Yes 56.34 0.05 Param.

Analysis of VarianceMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 1/15/2018, 5:38 PM


Parametric ANOVAConstituent: Boron, total Analysis Run 1/15/2018 5:37 PM View: ANOVA


For observations made between 9/27/2016 and 6/12/2017 the parametric analysis of variance test (after square root transformation) indicates VARIATIONat the 5% significance level. Because the calculated F statistic is greater than the tabulated F statistic, the hypothesis of a single homogeneous populationis rejected.

Calculated F statistic = 29.39

Tabulated F statistic = 2.95 with 3 and 28 degrees of freedom at the 5% significance level.

Source of Sum of Degrees of Mean FVariation Squares Freedom Squares

Between 0.557 3 0.1857 29.39Groups

Error Within 0.1769 28 0.006318Groups

Total 0.734 31

The Shapiro Wilk normality test on the residuals passed after square root transformation. Alpha = 0.05, calculated = 0.9385, critical = 0.93. Levene'sEquality of Variance test passed. Calculated = 0.427, tabulated = 2.95.


Parametric ANOVAConstituent: Calcium, total Analysis Run 1/15/2018 5:37 PM View: ANOVA


For observations made between 9/27/2016 and 6/12/2017 the parametric analysis of variance test indicates VARIATION at the 5% significance level. Becausethe calculated F statistic is greater than the tabulated F statistic, the hypothesis of a single homogeneous population is rejected.




Between 33772 3 11257 50.32Groups

Error Within 6264 28 223.7Groups

Total 40036 31

The Shapiro Wilk normality test on the residuals passed on the raw data. Alpha = 0.05, calculated = 0.9682, critical = 0.93. Levene's Equality of Variancetest passed. Calculated = 0.7016, tabulated = 2.95.


Non-Parametric ANOVAConstituent: Chloride, total Analysis Run 1/15/2018 5:37 PM View: ANOVA


For observations made between 9/27/2016 and 6/12/2017, the non-parametric analysis of variance test indicates a DIFFERENCE between the medians of the groupstested at the 5% significance level. Because the calculated Kruskal-Wallis statistic is greater than the Chi-squared value, we conclude that at least onegroup has a significantly different median concentration of this constituent when compared to another group.

Calculated Kruskal-Wallis statistic = 26.24

Tabulated Chi-Squared value = 7.815 with 3 degrees of freedom at the 5% significance level.

There were 0 groups of ties in the data, so no adjustment to the Kruskal-Wallis statistic (H) was necessary.


Parametric ANOVAConstituent: Fluoride, total Analysis Run 1/15/2018 5:37 PM View: ANOVA






Between 0.1552 3 0.05174 143.3Groups


Total 0.1653 31



Parametric ANOVAConstituent: pH, field Analysis Run 1/15/2018 5:37 PM View: ANOVA


For observations made between 9/26/2016 and 6/12/2017 the parametric analysis of variance test indicates VARIATION at the 5% significance level. Becausethe calculated F statistic is greater than the tabulated F statistic, the hypothesis of a single homogeneous population is rejected.




Between 1.104 3 0.3681 3.655Groups


Total 3.925 31

The Shapiro Wilk normality test on the residuals passed on the raw data. Alpha = 0.05, calculated = 0.9587, critical = 0.93. Levene's Equality of Variancetest passed. Calculated = 0.4104, tabulated = 2.95.


Non-Parametric ANOVAConstituent: Sulfate, total Analysis Run 1/15/2018 5:38 PM View: ANOVA


For observations made between 9/27/2016 and 6/12/2017, the non-parametric analysis of variance test indicates a DIFFERENCE between the medians of the groupstested at the 5% significance level. Because the calculated Kruskal-Wallis statistic is greater than the Chi-squared value, we conclude that at least onegroup has a significantly different median concentration of this constituent when compared to another group.

Calculated Kruskal-Wallis statistic = 22.83

Tabulated Chi-Squared value = 7.815 with 3 degrees of freedom at the 5% significance level.

There were 0 groups of ties in the data, so no adjustment to the Kruskal-Wallis statistic (H) was necessary.


Parametric ANOVAConstituent: Total Dissolved Solids [TDS] Analysis Run 1/15/2018 5:38 PM View: ANOVA






Between 383.2 3 127.7 56.34Groups


Total 446.7 31


Constituent Upper Lim. Lower Lim. Bg N Bg Mean Std. Dev. %NDs ND Adj. Transform Alpha Method

Boron, total (mg/L) 0.8168 n/a 32 0.6218 0.1261 0 None x^(1/3) 0.01 Inter

Calcium, total (mg/L) 207.3 n/a 32 118.1 35.94 0 None No 0.01 Inter

Chloride, total (mg/L) 68.94 n/a 32 4.181 1.661 0 None sqrt(x) 0.01 Inter

Fluoride, total (mg/L) 0.3237 n/a 32 0.1788 0.05841 0 None No 0.01 Inter

pH, field (SU) 8.031 6.037 32 7.034 0.3558 0 None No 0.01 Inter

Sulfate, total (mg/L) 732.7 n/a 32 5.988 1.22 0 None x^(1/3) 0.01 Inter

Total Dissolved Solids [TDS] (mg/L) 1108 n/a 32 23.87 3.796 0 None sqrt(x) 0.01 Inter

Tolerance Limits - Appendix IIIMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 11/9/2017, 5:31 AM

Constituent Well Upper Lim. Lower Lim. Compliance Sig. N Mean Std. Dev. %NDs ND Adj.Transform Alpha Method

Boron, total (mg/L) MW-1604D 4.18 2.95 0.82 Yes 8 3.21 0.4376 0 None No 0.004 NP (normality)

Boron, total (mg/L) MW-1604S 3.892 2.178 0.82 Yes 8 3.035 0.8084 0 None No 0.01 Param.



Boron, total (mg/L) MW-1606D 6.249 4.306 0.82 Yes 8 5.278 0.9165 0 None No 0.01 Param.


Boron, total (mg/L) MW-1607D 1.722 1.422 0.82 Yes 8 1.571 0.1457 0 None sqrt(x) 0.01 Param.


Calcium, total (mg/L) MW-1604D 301.1 268.1 207.3 Yes 8 284.6 15.56 0 None No 0.01 Param.

Calcium, total (mg/L) MW-1605D 411.1 322.2 207.3 Yes 8 366.4 43.39 0 None sqrt(x) 0.01 Param.

Calcium, total (mg/L) MW-1605S 266 220.5 207.3 Yes 8 243.3 21.5 0 None No 0.01 Param.


Chloride, total (mg/L) MW-1604D 117 109.7 68.94 Yes 8 113.4 3.462 0 None No 0.01 Param.

Chloride, total (mg/L) MW-1604S 124.8 93.98 68.94 Yes 8 109.4 14.54 0 None No 0.01 Param.

Chloride, total (mg/L) MW-1605D 196 163 68.94 Yes 8 180.6 13.99 0 None No 0.004 NP (normality)


Chloride, total (mg/L) MW-1606D 219.2 162 68.94 Yes 8 189.4 36.65 0 None x^3 0.01 Param.

Chloride, total (mg/L) MW-1606S 231 170 68.94 Yes 8 208.3 25.42 0 None No 0.004 NP (normality)

Chloride, total (mg/L) MW-1607D 112.6 95.44 68.94 Yes 8 104 8.111 0 None No 0.01 Param.


Fluoride, total (mg/L) MW-1606S 0.57 0.43 0.32 Yes 8 0.4713 0.04454 0 None No 0.004 NP (normality)

Fluoride, total (mg/L) MW-1607D 0.61 0.49 0.32 Yes 8 0.5263 0.03701 0 None No 0.004 NP (normality)

Sulfate, total (mg/L) MW-1604D 867.4 810.6 732.7 Yes 8 839 26.82 0 None No 0.01 Param.

Sulfate, total (mg/L) MW-1605D 1500 1130 732.7 Yes 8 1270 142.8 0 None No 0.004 NP (normality)

Sulfate, total (mg/L) MW-1605S 1143 991.1 732.7 Yes 8 1067 71.46 0 None No 0.01 Param.

Total Dissolved Solids [TDS] (mg/L) MW-1604D 1654 1586 1108 Yes 8 1620 32.07 0 None No 0.01 Param.

Total Dissolved Solids [TDS] (mg/L) MW-1604S 1488 1299 1108 Yes 8 1394 89.11 0 None No 0.01 Param.

Total Dissolved Solids [TDS] (mg/L) MW-1605D 2650 2240 1108 Yes 8 2360 144.4 0 None No 0.004 NP (normality)




Confidence Interval Summary Table - Significant ResultsMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 11/17/2017, 5:27 AM






Boron, total (mg/L) MW-1606D 6.249 4.306 0.82 Yes 8 5.278 0.9165 0 None No 0.01 Param.


Boron, total (mg/L) MW-1607D 1.722 1.422 0.82 Yes 8 1.571 0.1457 0 None sqrt(x) 0.01 Param.



Calcium, total (mg/L) MW-1604S 192.7 165.6 207.3 No 8 179.1 12.79 0 None No 0.01 Param.

Calcium, total (mg/L) MW-1605D 411.1 322.2 207.3 Yes 8 366.4 43.39 0 None sqrt(x) 0.01 Param.

Calcium, total (mg/L) MW-1605S 266 220.5 207.3 Yes 8 243.3 21.5 0 None No 0.01 Param.



Calcium, total (mg/L) MW-1607D 175.5 147.7 207.3 No 8 161.6 13.11 0 None No 0.01 Param.


Chloride, total (mg/L) MW-1604D 117 109.7 68.94 Yes 8 113.4 3.462 0 None No 0.01 Param.


Chloride, total (mg/L) MW-1605D 196 163 68.94 Yes 8 180.6 13.99 0 None No 0.004 NP (normality)


Chloride, total (mg/L) MW-1606D 219.2 162 68.94 Yes 8 189.4 36.65 0 None x^3 0.01 Param.

Chloride, total (mg/L) MW-1606S 231 170 68.94 Yes 8 208.3 25.42 0 None No 0.004 NP (normality)

Chloride, total (mg/L) MW-1607D 112.6 95.44 68.94 Yes 8 104 8.111 0 None No 0.01 Param.


Fluoride, total (mg/L) MW-1604D 0.2011 0.1739 0.32 No 8 0.1875 0.01282 0 None No 0.01 Param.

Fluoride, total (mg/L) MW-1604S 0.21 0.19 0.32 No 8 0.2013 0.008345 0 None No 0.004 NP (normality)

Fluoride, total (mg/L) MW-1605D 0.2 0.17 0.32 No 8 0.19 0.01195 0 None No 0.004 NP (normality)

Fluoride, total (mg/L) MW-1605S 0.2561 0.2289 0.32 No 8 0.2425 0.01282 0 None No 0.01 Param.

Fluoride, total (mg/L) MW-1606D 0.2701 0.2424 0.32 No 8 0.2563 0.01302 0 None No 0.01 Param.

Fluoride, total (mg/L) MW-1606S 0.57 0.43 0.32 Yes 8 0.4713 0.04454 0 None No 0.004 NP (normality)

Fluoride, total (mg/L) MW-1607D 0.61 0.49 0.32 Yes 8 0.5263 0.03701 0 None No 0.004 NP (normality)

Fluoride, total (mg/L) MW-1607S 0.3203 0.2772 0.32 No 8 0.2988 0.02031 0 None No 0.01 Param.

pH, field (SU) MW-1604D 7.87 7.16 8.03 No 8 7.366 0.2368 0 None No 0.004 NP (normality)

pH, field (SU) MW-1604S 7.67 6.94 8.03 No 8 7.19 0.2657 0 None No 0.004 NP (normality)

pH, field (SU) MW-1605D 7.79 7.121 8.03 No 7 7.456 0.2388 0 None No 0.005 Param.

pH, field (SU) MW-1605S 7.713 7.1 8.03 No 8 7.406 0.2476 0 None No 0.005 Param.

pH, field (SU) MW-1606D 7.56 7.175 8.03 No 7 7.367 0.1373 0 None No 0.005 Param.

pH, field (SU) MW-1606S 7.691 6.54 8.03 No 8 7.131 0.508 0 None x^3 0.005 Param.

pH, field (SU) MW-1607D 8.41 6.9 8.03 No 8 7.656 0.4084 0 None No 0.004 NP (normality)

pH, field (SU) MW-1607S 7.663 7.423 8.03 No 7 7.543 0.08577 0 None No 0.005 Param.

Sulfate, total (mg/L) MW-1604D 867.4 810.6 732.7 Yes 8 839 26.82 0 None No 0.01 Param.

Sulfate, total (mg/L) MW-1604S 702.1 610.9 732.7 No 8 656.5 42.99 0 None No 0.01 Param.

Sulfate, total (mg/L) MW-1605D 1500 1130 732.7 Yes 8 1270 142.8 0 None No 0.004 NP (normality)

Sulfate, total (mg/L) MW-1605S 1143 991.1 732.7 Yes 8 1067 71.46 0 None No 0.01 Param.

Sulfate, total (mg/L) MW-1606D 811.1 680 732.7 No 8 725.5 139.9 0 None x^6 0.01 Param.


Sulfate, total (mg/L) MW-1607D 437.2 322.3 732.7 No 8 379.8 54.24 0 None No 0.01 Param.




Total Dissolved Solids [TDS] (mg/L) MW-1605D 2650 2240 1108 Yes 8 2360 144.4 0 None No 0.004 NP (normality)




Total Dissolved Solids [TDS] (mg/L) MW-1607D 1007 805.4 1108 No 8 906.3 95.15 0 None No 0.01 Param.

Confidence Interval Summary Table - All ResultsMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 11/17/2017, 5:27 AM


Page 2

Total Dissolved Solids [TDS] (mg/L) MW-1607S 737.9 679.1 1108 No 8 708.5 27.77 0 None No 0.01 Param.

Confidence Interval Summary Table - All ResultsMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 11/17/2017, 5:27 AM

0

6

12

18

24

30

Parametric and Non-Parametric (NP) Confidence IntervalCompliance limit is exceeded.* Per-well alpha = 0.01 except as noted. Normality Test: Shapiro Wilk, alpha based on n.

Constituent: Boron, total Analysis Run 11/17/2017 5:23 AM View: Confidence Intervals



mg/

L

n=8 NP(normality) α=0.004

n=8 n=8 NP(normality) α=0.004

n=8n=8

n=8 n=8 sqrt(x)

n=8

————————————————————————————————————————————————————————————————Limit = 0.820

120

240

360

480

600

Parametric Confidence IntervalCompliance limit is exceeded.* Per-well alpha = 0.01. Normality Test: Shapiro Wilk, alpha based on n.

Constituent: Calcium, total Analysis Run 11/17/2017 5:23 AM View: Confidence Intervals



mg/

L

n=8MW

-1604S

n=8 n=8 sqrt(x)

n=8n=8

MW-1606S

n=8MW

-1607D

n=8MW

-1607S

n=8

————————————————————————————————————————————————————————————————Limit = 207.3

0

80

160

240

320

400


Constituent: Chloride, total Analysis Run 11/17/2017 5:23 AM View: Confidence Intervals



mg/

L

n=8n=8 n=8 NP(normality) α=0.004

n=8n=8 x^3


n=8n=8

————————————————————————————————————————————————————————————————Limit = 68.94

0

0.16

0.32

0.48

0.64

0.8


Constituent: Fluoride, total Analysis Run 11/17/2017 5:23 AM View: Confidence Intervals



mg/

L

MW-1604D

n=8MW

-1604S


MW-1605D


MW-1605S

n=8MW

-1606D



MW-1607S

n=8

————————————————————————————————————————————————————————————————Limit = 0.32

0

2

4

6

8

10

Parametric and Non-Parametric (NP) Confidence IntervalCompliance Limit is not exceeded. Normality Test: Shapiro Wilk, alpha based on n.

Constituent: pH, field Analysis Run 11/17/2017 5:24 AM View: Confidence Intervals



SU

MW-1604D

n=8 NP(normality) α=0.004/tail

MW-1604S


MW-1605D

n=7 α=0.005/tail

MW-1605S

n=8 α=0.005/tail

MW-1606D

n=7 α=0.005/tail

MW-1606S

n=8 x^3 α=0.005/tail

MW-1607D


MW-1607S

n=7 α=0.005/tail

————————————————————————————————————————————————————————————————Limit = 8.03

————————————————————————————————————————————————————————————————Limit = 6.04

0

600

1200

1800

2400

3000


Constituent: Sulfate, total Analysis Run 11/17/2017 5:24 AM View: Confidence Intervals



mg/

L

n=8MW

-1604S


n=8MW

-1606D

n=8 x^6

MW-1606S

n=8MW

-1607D

n=8MW

-1607S

n=8

————————————————————————————————————————————————————————————————Limit = 732.7

0

800

1600

2400

3200

4000


Constituent: Total Dissolved Solids [TDS] Analysis Run 11/17/2017 5:24 AM View: Confidence Intervals



mg/

L

n=8n=8 n=8 NP(normality) α=0.004

n=8n=8

n=7MW

-1607D

n=8MW

-1607S

n=8

————————————————————————————————————————————————————————————————Limit = 1108

Constituent Well Upper Lim. Lower Lim. Bg N Bg Mean Std. Dev. %NDs ND Adj. Transform Alpha Method

pH, field (SU) MW-1601A 8.031 6.454 8 7.243 0.2615 0 None No 0.0004701 Param 1 of 2

pH, field (SU) MW-1602 7.694 5.816 8 6.755 0.3115 0 None No 0.0004701 Param 1 of 2



pH, field (SU) MW-1604D 8.08 6.653 8 7.366 0.2368 0 None No 0.0004701 Param 1 of 2

pH, field (SU) MW-1604S 7.991 6.389 8 7.19 0.2657 0 None No 0.0004701 Param 1 of 2





pH, field (SU) MW-1607D 7.77 6.9 7 n/a n/a 0 n/a n/a 0.05531 NP (normality) 1 of 2


Intrawell Prediction Limit Summary TableMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 12/27/2017, 6:36 PM

0

25

50

75

100

0 1 2 3 4 5

Intrawell Prediction Limit, n=8, '1of2'

EPA Reference Curve

Power Curve

Analysis Run 11/17/2017 5:32 AM View: Confidence Intervals



Pow

er

Standard Deviations

Kappa = 3.014, based on 8 compliance wells and 7 constituents, evaluated semi-annually (this report reflects annual total).

Constituent Upper Lim. Bg N Bg Mean Std. Dev. %NDs ND Adj. Transform Alpha Method

Boron, total (mg/L) 0.684 32 0.6218 0.1261 0 None x^(1/3) 0.0009403 Param 1 of 2

Calcium, total (mg/L) 192 32 118.1 35.94 0 None No 0.0009403 Param 1 of 2

Chloride, total (mg/L) 57.7 32 4.181 1.661 0 None sqrt(x) 0.0009403 Param 1 of 2

Fluoride, total (mg/L) 0.2989 32 0.1788 0.05841 0 None No 0.0009403 Param 1 of 2

Sulfate, total (mg/L) 613.3 32 5.988 1.22 0 None x^(1/3) 0.0009403 Param 1 of 2

Total Dissolved Solids [TDS] (mg/L) 1003 32 23.87 3.796 0 None sqrt(x) 0.0009403 Param 1 of 2

Interwell Prediction Limit Summary TableMountaineer BAP Client: Geosyntec Data: Mountaineer BAP Printed 11/17/2017, 5:40 AM

0

25

50

75

100

0 1 2 3 4 5

Interwell Prediction Limit, n=32, '1of2'

EPA Reference Curve

Power Curve

Analysis Run 11/17/2017 5:32 AM View: Confidence Intervals



Pow

er

Standard Deviations

Kappa = 2.056, based on 8 compliance wells and 7 constituents, evaluated semi-annually (this report reflects annual total).

APPENDIX 3 – Alternative Source Demonstrations

The Appendix III parameter alternative source demonstration follows.

150 E.Wilson Bridge Road, Suite 232

Columbus, Ohio 43085 PH 614.468.0415

FAX 614.468.0416

www.geosyntec.com

CHA8423 20180413 Mountaineer BAP Memo

M e mo r a n d u m

Date: April 13, 2018

To: David Miller (AEP)

Copies to: Matt Powell (AEP)

From: Allison Kreinberg and Bruce Sass, Ph.D. (Geosyntec)

Subject: Alternative Source Demonstration Initial Evaluation at

Mountaineer Plant’s Bottom Ash Pond (BAP)

Two detection monitoring events were recently completed at the Bottom Ash Pond (BAP), an

existing CCR unit at the Mountaineer Power Plant located in Letart, West Virginia. While the

analytical data for the second event is not yet available, the results of the first event identified

likely statistically significant increases (SSIs) for the following parameters:

• Boron at MW-1604D, MW-1604S, MW-1605D, MW-1605S, MW-1606D, MW-1606S,

MW-1607D, and MW-1607S;

• Calcium at MW-1604D, MW-1605D, MW-1605S, MW-1606D, MW-1606S, and MW-

1607D;

• Chloride at MW-1604D, MW-1604S, MW-1605D, MW-1605S, MW-1606D, MW-1606S,

MW-1607D, and MW-1607S;

• Fluoride at MW-1606S and MW-1607D;

• Total dissolved solids (TDS) at MW-1604D, MW-1604S, MW-1605D, MW-1605S, MW-

1606D, MW-1606S, and MW-1607D; and,

• Sulfate at MW-1604D, MW-1605D, MW-1605S, MW-1606D, MW-1606S, and MW-

1607D.

A summary of the analytical results and the calculated prediction limits to which they were

compared is provided in Table 1.

Evaluation of Detection Monitoring Data – Mountaineer BAP

April 13, 2018

Page 2

CHA8423 20180413 Mountaineer BAP Memo

Moving forward, either an alternative source demonstration (ASD) will be conducted or the unit

will transition to assessment monitoring. Geosyntec Consultants, Inc. (Geosyntec) recently

completed an initial assessment of geochemistry and site history data for the BAP to evaluate if an

ASD is likely to be successful. The initial evaluation reviewed five possible sources of ASDs:

• ASD Type I: Sampling Causes;

• ASD Type II: Laboratory Causes;

• ASD Type III: Statistical Evaluation Causes;

• ASD Type IV: Natural Variation; and

• ASD Type V: Alternative Sources.

The initial review indicates there are no alternative sources of any type which could explain the

SSIs at the BAP based on the currently available geochemical data.

INITIAL EVALUATION

Geosyntec completed an evaluation of the detection monitoring results, site geochemistry, and site

history data to assess possible sources of an ASD. This evaluation included a review of the

laboratory quality assurance and quality control (QA/QC) data and the provided field forms. Also,

Geosyntec reviewed all work performed by Groundwater Stats Consulting, Inc. and found no

errors in the statistical calculations. Thus, this initial evaluation did not identify ASDs due to Type

I, Type II, or Type III issues. A review of the available geochemistry data found insufficient

evidence for natural variation which might explain the aforementioned SSIs at the BAP.

CONCLUSIONS

Based on this evaluation, Geosyntec did not identify an alternative source for the SSIs observed at

the Mountaineer BAP at this time.

Table 1: Detection Monitoring Data EvaluationMountaineer Plant - Bottom Ash Pond


10/30/2017 1/22/2018 10/30/2017 1/22/2018 10/31/2017 1/22/2018 10/31/2017 1/22/2018mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 2.6 3.07 2.17 2.36 7.83 9.33 5.88 10.1mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 295 291 167 - 324 321 212 231mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 116 118 85.3 105 198 197 222 220mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 0.2 - 0.21 - 0.21 - 0.25 -SU Intrawell Background Value (UPL)SU Intrawell Background Value (LPL)SU Detection Monitoring Result 7.21 7.2 7.09 6.9 7.32 7..2 7.18 7.1

mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 1570 1620 1150 1312 2170 2060 2000 1970mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 833 862 544 602 1170 1070 1040 976

10/31/2017 1/23/2018 10/31/2017 1/23/2018 10/31/2017 1/23/208 10/31/2017 1/23/2018mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 7.03 9.59 9.54 6.62 1.76 2.34 1.32 1.49mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 287 322 226 218 214 244 165 -mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 213 327 187 184 138 150 100 111mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 0.24 - 0.46 0.43 0.47 0.44 0.28 -SU Intrawell Background Value (UPL)SU Intrawell Background Value (LPL)SU Detection Monitoring Result 7.34 7.4 7.13 7.2 7.58 7.5 7.46 7..4

mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 1590 1730 1410 1450 1290 1380 860 -mg/L Interwell Background Value (UPL)mg/L Detection Monitoring Result 770 760 644 660 626 668 343 -

Notes:UPL: Upper prediction limitLPL: Lower prediction limit-: Not SampledBold values exceed the background value.Background values are shaded gray.

613

MW-1606D MW-1606S MW-1607D MW-1607S

0.68

192

57.7

0.299

6.67 5.6 6.9 7.26

1003

8.22 8.66 7.77 7.83

Chloride

Fluoride

pH


Sulfate


Boron

Calcium

0.68

192

57.7

1003

613

6.65 6.39 6.65

MW-1604D MW-1604S MW-1605D MW-1605S


Sulfate


Boron

Calcium

8.156.66

Chloride

Fluoride

pH

0.299

8.08 7.99 8.26

APPENDIX 4 - Notices for Monitoring Program Transitions

The notification that an assessment monitoring program was established follows.

Mountaineer Plant

Notice of Assessment Monitoring Program Establishment

Bottom Ash Pond

On January 15, 2018, it was determined that Mountaineer Plant’s Bottom Ash

Pond had statistically significant increases over background for Boron, Calcium,

Chloride, Fluoride, Sulfate, and Total Dissolved Solids (TDS). An alternative

source demonstration was not successful within the 90 day period as allowed for in

257.94(e)(2) prompting the initiation of an assessment monitoring program, which

was established on April 13, 2018. Therefore this notice is being placed in the

operating record in accordance with the requirement of 257.94(e)(3).

APPENDIX 5 - Well Installation/Decommissioning Logs

Not applicable at this time.

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