ANNUAL GROUNDWATER MONITORING AND CORRECTIVE ACTION REPORT FOR 2018 JAMES RIVER POWER STATION (JRPS) Prepared for:

Transcription

1 ANNUAL GROUNDWATER MONITORING AND CORRECTIVE ACTION REPORT FOR 2018 JAMES RIVER POWER STATION (JRPS) Prepared for: City Utilities of Springfield 301 E. Central Street Springfield, Missouri Prepared by: 125 Broadway Avenue Oak Ridge, Tennessee, January 2019

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3 Table of Contents 1.0 INTRODUCTION Background Potentiometric Mapping GROUNDWATER SAMPLING AND ANALYSIS Summary of Groundwater Sampling Events Groundwater Sampling Procedures Groundwater Field Quality Control HANDLING OF INVESTIGATIVE-DERIVED WASTE DATA VALIDATION AND STATISTICAL ANALYSIS SUMMARY OF FINDINGS CCR Appendix III Constituents Analytical Results CCR Appendix IV Constituents Analytical Results Summary REFERENCES... 4 List of Tables Table 1 Table 2 Table 3 CCR Analytical Constituents Analytical Results for Appendix III Constituents in Groundwater at JRPS Analytical Results for Appendix IV Constituents in Groundwater at JRPS List of Figures Figure 1 JRPS Site Diagram Figure 2 Potentiometric Elevation 11/29/2017 Figure 3 Potentiometric Elevation 01/23/2018 Figure 4 Potentiometric Elevation 03/05/2018 Figure 5 Potentiometric Elevation 04/12/2018 Figure 6 Potentiometric Elevation 11/02/2018 Appendices Appendix A Appendix B Analytical Data Validation Reports Statistical Analysis Report ii

4 1.0 INTRODUCTION This Annual Groundwater Monitoring and Corrective Action Report describes the results of the groundwater monitoring activities for City Utilities of Springfield, Missouri (CU) James River Power Station (JRPS) Utility Waste Landfill (UWL). This report has been prepared for CU in accordance with the requirements of the federal Coal Combustion Residuals (CCR) Rule codified in 40 CFR (e). Specifically, this annual report documents the status of the groundwater monitoring program for the JRPS UWL, summarizes key actions completed, describes any problems encountered and discusses actions to resolve them, and outlines key activities for the upcoming year. The monitoring activities described in this report were conducted in accordance with the Groundwater Characterization Work Plan, Revision 2 (GeoEngineers 2017) and the Groundwater Sampling and Analysis Plan (SAP) (GeoEngineers 2016). 1.1 Background JRPS is a coal-fired power plant located in Greene County, Missouri. The JRPS UWL is a 43-acre landfill operated under solid waste disposal area operating permit No issued December 16, 1992 by the Missouri Department of Natural Resources. The CCR rule requires a groundwater monitoring program to determine if CCR constituents in downgradient groundwater monitoring wells show a statistically significant increase (SSI) over concentrations found in upgradient groundwater monitoring wells. The groundwater investigation at JRPS is being conducted pursuant to the requirements in 40 CFR through 40 CFR This report presents the analytical results and statistical prediction limits that have been calculated in accordance with 40 CFR (f)(3) for the constituents listed in Appendix III and IV of 40 CFR 257. JRPS has a groundwater monitoring network of eight (8) monitoring wells in the Springfield aquifer. Background information on the monitoring wells can be found in the Groundwater Characterization Work Plan, Revision 2 (GeoEngineers 2017). Two (2) of these wells are upgradient wells and six (6) are downgradient wells. Figure 1 depicts an aerial map showing the CCR unit (i.e., UWL) including all the background and downgradient monitoring well locations as required by 40 CFR (e)(1). In 2018 there were no wells abandoned or added to the JRPS groundwater monitoring well network. 1.2 Potentiometric Mapping The potentiometric surfaces that were contoured for each monitoring event from November 2017 through November 2018 are included as Figures 2 through 6. In general, groundwater flow has been from the northwest to the southeast parallel to the James River. In the April groundwater monitoring event a groundwater mound was observed in PZ-SA-U-5 which occurred 15 days after two large spikes (rainfall events) recorded at the U.S. Geological Survey James River gauge. This mounding event is due to a preferential flow path that occurs during high river stages and has been seen at other monitoring wells in previous years. 2.0 GROUNDWATER SAMPLING AND ANALYSIS 2.1 Summary of Groundwater Sampling Events Between October 20, 2016 and November 2, 2018, thirteen (13) rounds of groundwater sampling have been completed at the JRPS UWL utilizing procedures consistent with the Sampling and Analysis Plan 1

5 (GeoEngineers, 2016). The following six (6) groundwater sampling events have been conducted at JRPS since the initial Annual Groundwater Monitoring and Corrective Action Report (January 2018): Round 9: November 29 December 1, 2017 Round 10: January 23 24, 2018 Round 11: March 6 8, 2018 Round 12: April 12 18, 2018 Round 13: November 2 8, Groundwater Sampling Procedures Some minor deviations were noted from the sampling and analysis procedures outlined in the SAP. These deviations are summarized in the section 2.3 below. Five (5) groundwater sampling events were conducted at JRPS since the initial Annual Groundwater Monitoring and Corrective Action Report. All sample collection events were conducted by GeoEngineers field personnel. Groundwater sampling activities were conducted in accordance with the SAP. These activities included measuring depth to groundwater and calculating groundwater elevations, downloading continuous waterlevel monitoring data from data-logging pressure transducers installed in the monitoring wells, and collecting water quality parameters prior to sampling groundwater for laboratory analysis of the constituents listed in Table 1, below. The procedure for collecting groundwater samples is as follows: 1. Measure the depth of water in the monitoring wells using a decontaminated electronic water-level indicator. 2. Purge water from monitoring wells following guidance of the U.S. Environmental Protection Agency (EPA) low stress/minimal drawdown procedure. Measure and record water-quality parameters during purging including: ph, dissolved oxygen (DO), specific conductivity, temperature, oxidation-reduction potential (ORP), and turbidity. 3. Collect groundwater samples from monitoring wells when water-quality parameters have stabilized using low flow sampling methods and dedicated sampling equipment. 4. Submit samples under proper Chain-of-Custody to PDC Analytical Services, Inc. for the following analyses: a. Total Metals (As, B, Ba, Be, Ca, Cd, Cr, Co, Li, Mo, Pb, Se, Sb, and Tl) by EPA Method 6010B/6020A; b. Mercury by EPA Method 7470; c. Anions (Chloride, Fluoride Sulfate) by EPA Method 300.0; d. ph by SM 4500 H+B; e. Radium 226/228 by EPA method 903.1/904 analyzed at Pace Laboratories; and f. Total dissolved solids by EPA Method SM 2540C. 2

6 5. Collect and submit one duplicate groundwater sample per round for the same analyses as the other groundwater samples. 6. Measure and record the water-quality parameters during sampling: ph, DO, specific conductivity, temperature, ORP, and turbidity. 2.3 Groundwater Field Quality Control All wells were sampled using permanently-installed low-flow bladder pumps controlled by either an In-Situ MP-10H or MP-50 pump controller using a compressed nitrogen pressure source. All groundwater sampling activities were conducted in accordance with the SAP. Departures from SAP procedures and other notable observations for each of the sampling events are summarized below. In the April 2018 sampling event monitoring well, turbidity measurements of less than 5 NTUs could not be obtained at PZ-SA-U-5. This sampling event occurred after a high water level stage in the James River, and the well had an elevated groundwater level indicating a preferential flow path from the river to the well. Turbidity measurements were collected from the James River and the turbidity was also above 5 NTUs. Filtered and unfiltered samples were collected from PZ-SA-U-5 during in the April sampling event due to the elevated turbidity levels. 3.0 HANDLING OF INVESTIGATIVE-DERIVED WASTE Investigative-derived waste (IDW) were generated and handled appropriately during each sampling event. Waste consisted of decontamination water and purge water. IDW was containerized in buckets and disposed of onsite. Purge water and decontamination water were returned to the local storm water retention pond within the landfill boundary. Disposable items, such as gloves and paper towels, were disposed of as municipal waste. 4.0 DATA VALIDATION AND STATISTICAL ANALYSIS Data from the thirteen (13) rounds of groundwater samples were collected and validated in accordance with Appendix A of the SAP. Data validation reports are included in Appendix A of this report. Upon completion of validation, statistical analyses were conducted using the Sanitas software and are included in Appendix B. The calculations to test for SSIs over background were performed for each constituent listed in 40 CFR 257 Appendix III & IV using the prediction interval module. 40 CFR (f)(3) includes the prediction interval approach as one of five acceptable approaches for determining statistical significance. The Sanitas software is well suited to performing prediction interval analysis. The data from the first ten (10) sampling rounds from the upgradient wells were input into the prediction interval module in the Sanitas software and the prediction limits were calculated for each constituent of concern. By default, the prediction interval module in Sanitas first performs a Shapiro-Wilk/Francia test to determine if the data have a normal distribution. If the data have a normal distribution, then a parametric prediction interval is calculated. If the data do not have a normal distribution, then a non-parametric prediction interval is calculated. The prediction limits are the screening values that each constituent concentration from the downgradient wells were compared to determine if a SSI had occurred. 3

7 5.0 SUMMARY OF FINDINGS 5.1 CCR Appendix III Constituents Analytical Results Analytical results for CCR Appendix III are included in Table 2. The statistical analyses presented in Appendix B incorporated the data from the upgradient (background) wells MW-SA-1 and PZ-SA-U-2, and downgradient wells PZ-SA-U-1, MW-SA-4, PZ-SA-U-5, MW-SA-5, PZ-SA-U-4, MW-2, and PZ-SA-U-3. Statistical prediction limits were calculated for boron, calcium, chloride, fluoride, ph, sulfate, and total dissolved solids. All constituents except calcium, chloride and fluoride had one or more downgradient sampling results that exceeded the statistical prediction limit. Based on the first ten rounds of sampling (October 2016 through January 2018), background groundwater quality concentrations for each of the constituents were established consistent with the requirements and statistical procedures in 40 CFR Due to SSI over background for Appendix III constituents, assessment monitoring was initiated at JPRS per the notification dated March 8, CCR Appendix IV Constituents Analytical Results Analytical results for CCR Appendix IV are included in Table 3. The statistical analyses in Appendix B incorporated the data from the upgradient wells MW-SA-1 and PZ-SA-U-2, and downgradient wells PZ-SA-U- 1, MW-SA-4, PZ-SA-U-5, MW-SA-5, PZ-SA-U-4, MW-2, and PZ-SA-U-3. Statistical prediction limits were calculated for antimony, arsenic, barium, beryllium, cadmium, chromium, cobalt, fluoride, lead, lithium, mercury, molybdenum, selenium, thallium, and radium 226/228 combined. All constituents except cadmium, cobalt, fluoride, lithium, and mercury had one or more downgradient sampling result that exceeded the statistical prediction limit in The concentrations of all constituents were less than their respective groundwater protection standard or maximum contaminant levels (MCL). 5.3 Summary Because all but three constituents in the CCR Appendix III constituent list exceeded the statistical prediction limits, assessment monitoring began on March 8, During assessment monitoring, none of the Appendix IV constituents exceeded their groundwater protection standard. In accordance with (e), the assessment monitoring program at JRPS will continue until concentrations of all Appendix III and IV constituents are at or below background levels for two consecutive rounds of sampling. 6.0 REFERENCES GeoEngineers, 2016 (21 September). Groundwater Sampling and Analysis Plan, James River Power Station Utility Waste Landfill, Greene County, Missouri. GeoEngineers, 2017 (24 March). Groundwater Characterization Work Plan, Revision 2, James River Power Station Utility Waste Landfill, Greene County, Missouri Jacobs, 2018 (31 January). Annual Groundwater Monitoring and Corrective Action Report James River Power Station, Greene County, Missouri 4

8 Tables

9 Table 1 CCR Analytical Constituents

10 Table 1 CCR Analytical Constituents CCR 40 CFR 257 Appendix III Constituents Boron Calcium Chloride Fluoride ph Sulfate Total Dissolved Solids CCR 40 CFR 257 Appendix IV Constituents Antimony Arsenic Barium Beryllium Cadmium Chromium Cobalt Fluoride Lead Lithium Mercury Molybdenum Selenium Thallium Radium 226 and 228 combined

11 Table 2 Analytical Results for Appendix III Constituents in Groundwater at JRPS

12 James River Power Station (JRPS) Unfiltered Sample Results for Appendix III Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Boron (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l 0.49 Boron (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l 0.46 Boron (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l 0.24 Boron (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l 0.25 Boron (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l 0.87 Boron (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l Boron (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l Boron (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l Boron (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l Boron (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l Boron (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l Boron (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 0.03 Boron (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l Boron (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l Boron (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l Boron (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l Boron (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 0.3 Boron (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l 0.3 Boron (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l 0.24 Boron (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l 0.22 Boron (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 0.25 Boron (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l 0.18 Boron (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 0.11 Boron (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 1.5 Boron (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 1.3 Boron (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l 0.96 Boron (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 0.88 Boron (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l 0.48 Boron (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 0.12 Boron (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l 0.12 Boron (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 0.19 Boron (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l 0.19 Boron (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l 0.1 Boron (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l Boron (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 0.1 Boron (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l 0.1 Calcium (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l 89 Val Quals

13 James River Power Station (JRPS) Unfiltered Sample Results for Appendix III Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Calcium (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l 84 Calcium (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l 69 Calcium (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l 72 Calcium (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l 84 Calcium (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l 120 Calcium (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l 120 Calcium (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l 110 Calcium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l 110 Calcium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l 100 Calcium (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l 130 Calcium (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 71 Calcium (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l 69 Calcium (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l 86 Calcium (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l 93 Calcium (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 94 Calcium (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 97 Calcium (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l 97 Calcium (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l 89 Calcium (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l 92 Calcium (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 100 Calcium (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l 110 Calcium (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l 100 Calcium (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l 80 Calcium (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l 120 Calcium (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 93 Calcium (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l 88 Calcium (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l 110 Calcium (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l 94 Calcium (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 87 Calcium (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l 88 Calcium (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 120 Calcium (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 110 Calcium (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l 94 Calcium (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 96 Calcium (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l 91 Calcium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 62 Calcium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l 60 Calcium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 63 Calcium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l 64 Calcium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l 63 Calcium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l 69 Calcium (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l 85 Calcium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 77 Calcium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l 77 Chloride JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l 9.3 Chloride JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l 10 Val Quals

14 James River Power Station (JRPS) Unfiltered Sample Results for Appendix III Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Chloride JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l 6.6 Chloride JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l 5.7 Chloride JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l 8.6 Chloride JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l 16 Chloride JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l 15 Chloride JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l 15 Chloride JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l 13 Chloride JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l 13 Chloride JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l 13 Chloride JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 20 Chloride JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l 17 Chloride JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l 9.7 Chloride JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l 8.2 Chloride JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 12 Chloride JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 13 Chloride JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l 13 Chloride JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l 9.7 Chloride JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l 8.6 Chloride JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 8.9 Chloride JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l 12 Chloride JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l 15 Chloride JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l 11 Chloride JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l 8.5 Chloride JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 8.2 Chloride JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l 26 Chloride JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l 15 Chloride JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l 10 Chloride JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 8.6 Chloride JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l 7.5 Chloride JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 9.8 Chloride JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 9.3 Chloride JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l 8 Chloride JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 7.1 Chloride JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l 4.8 Chloride JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 17 Chloride JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l 17 Chloride JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 17 Chloride JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l 18 Chloride JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l 11 Chloride JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l 11 Chloride JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l 9.3 Chloride JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 15 Chloride JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l 12 Fluoride JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l J Fluoride JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l J Fluoride JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l J

15 James River Power Station (JRPS) Unfiltered Sample Results for Appendix III Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Fluoride JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l U Fluoride JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l U Fluoride JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Fluoride JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Fluoride JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l J Fluoride JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l U Fluoride JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l U Fluoride JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Fluoride JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l U Fluoride JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Fluoride JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l U Fluoride JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Fluoride JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l 0.17 J Fluoride JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l Fluoride JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l Fluoride JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l J Fluoride JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l J Fluoride JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l J Fluoride JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U ph JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW ph Units 7.59 ph JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW ph Units 7.66 J ph JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW ph Units 7.62 J ph JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW ph Units 7.52 J

16 James River Power Station (JRPS) Unfiltered Sample Results for Appendix III Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals ph JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW ph Units 7.36 J ph JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP ph Units 7.16 ph JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP ph Units 7.35 J ph JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP ph Units 7.3 J ph JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP ph Units 7.38 J ph JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP ph Units 7.38 J ph JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP ph Units 7.16 J ph JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA ph Units 7.43 ph JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA ph Units 7.55 J ph JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA ph Units 7.37 J ph JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA ph Units 7.48 J ph JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA ph Units 7.15 J ph JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA ph Units 7.5 ph JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA ph Units 7.66 J ph JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA ph Units 7.39 J ph JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA ph Units 7.53 J ph JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA ph Units 7.34 J ph JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U ph Units 7.31 ph JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U ph Units 7.54 J ph JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U ph Units 7.38 J ph JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U ph Units 7.55 J ph JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U ph Units 7.21 J ph JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U ph Units 7.52 ph JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U ph Units 7.48 J ph JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U ph Units 7.44 J ph JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U ph Units 7.5 J ph JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U ph Units 7.28 J ph JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U ph Units 7.37 ph JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U ph Units 7.57 J ph JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U ph Units 7.42 J ph JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U ph Units 7.43 J ph JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U ph Units 7.35 J ph JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U ph Units 7.57 ph JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD ph Units 7.58 ph JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U ph Units 7.7 J ph JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD ph Units 7.72 J ph JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U ph Units 7.48 J ph JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD ph Units 7.45 J ph JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U ph Units 7.44 J ph JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U ph Units 7.26 J ph JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD ph Units 7.31 J Sulfate JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l 71 Sulfate JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l 69 Sulfate JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l 33 Sulfate JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l 37 Sulfate JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l 45

17 James River Power Station (JRPS) Unfiltered Sample Results for Appendix III Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Sulfate JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l 19 Sulfate JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l 14 Sulfate JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l 24 Sulfate JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l 22 Sulfate JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l 22 Sulfate JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l 14 Sulfate JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 13 Sulfate JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l 16 Sulfate JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l 30 Sulfate JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l 28 Sulfate JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 21 Sulfate JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 65 Sulfate JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l 57 Sulfate JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l 56 Sulfate JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l 56 Sulfate JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 47 Sulfate JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l 31 Sulfate JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l 30 Sulfate JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l 44 Sulfate JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l 49 Sulfate JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 34 Sulfate JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l 73 Sulfate JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l 50 Sulfate JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l 47 Sulfate JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 52 Sulfate JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l 48 Sulfate JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 170 Sulfate JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 130 Sulfate JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l 110 Sulfate JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 110 Sulfate JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l 48 Sulfate JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 17 Sulfate JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l 17 Sulfate JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 20 Sulfate JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l 24 Sulfate JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l 22 Sulfate JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l 22 Sulfate JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l 25 Sulfate JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 18 Sulfate JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l 17 Total Dissolved Solids (TDS) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l 310 Total Dissolved Solids (TDS) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l 320 Total Dissolved Solids (TDS) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l 260 Total Dissolved Solids (TDS) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l 270 Total Dissolved Solids (TDS) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l 280 Total Dissolved Solids (TDS) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l 360 J

18 James River Power Station (JRPS) Unfiltered Sample Results for Appendix III Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Total Dissolved Solids (TDS) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l 360 Total Dissolved Solids (TDS) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l 380 Total Dissolved Solids (TDS) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l 380 Total Dissolved Solids (TDS) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l 380 Total Dissolved Solids (TDS) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l 370 J Total Dissolved Solids (TDS) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 200 Total Dissolved Solids (TDS) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l 230 Total Dissolved Solids (TDS) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l 260 Total Dissolved Solids (TDS) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l 240 Total Dissolved Solids (TDS) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 290 Total Dissolved Solids (TDS) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l 320 Total Dissolved Solids (TDS) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l 340 Total Dissolved Solids (TDS) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l 320 Total Dissolved Solids (TDS) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l 340 Total Dissolved Solids (TDS) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 320 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l 310 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l 400 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l 280 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l 310 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 340 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l 460 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l 470 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l 460 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 460 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l 440 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 460 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 480 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l 400 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 420 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l 330 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 200 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l 180 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 230 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l 230 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l 240 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l 230 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l 260 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l 240 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l 240

19 James River Power Station (JRPS) Filtered Sample Results for Appendix III Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Boron JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l Calcium JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l 72 Chloride JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l 9.3 Fluoride JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l U ph JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL ph Units 7.44 J Sulfate JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l 24 Total Dissolved Solids (TDS) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l 230

20 Table 3 Analytical Results for Appendix IV Constituents in Groundwater at JRPS

21 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Antimony (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l J Antimony (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l U Antimony (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l U Antimony (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l U Antimony (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l U Antimony (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Antimony (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l U Antimony (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l U Antimony (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l U Antimony (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l U Antimony (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Antimony (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Antimony (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l U Antimony (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l U Antimony (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l U Antimony (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Antimony (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Antimony (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l U Antimony (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l U Antimony (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l U Antimony (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Antimony (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l J Antimony (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Antimony (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Antimony (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l J Antimony (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Antimony (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l U Antimony (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l U Antimony (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Antimony (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Arsenic (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l J

22 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Arsenic (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l J Arsenic (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l J Arsenic (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l J Arsenic (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l U Arsenic (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Arsenic (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l U Arsenic (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l J Arsenic (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l U Arsenic (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l U Arsenic (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Arsenic (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Arsenic (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l J Arsenic (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l J Arsenic (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l J Arsenic (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Arsenic (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Arsenic (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l J Arsenic (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l U Arsenic (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l J Arsenic (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Arsenic (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Arsenic (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Arsenic (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l U Arsenic (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Arsenic (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l J Arsenic (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l J Arsenic (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l J Arsenic (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l J Arsenic (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Arsenic (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Barium (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l Barium (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l 0.068

23 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Barium (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l 0.12 Barium (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l Barium (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l Barium (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l Barium (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l Barium (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l Barium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l Barium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l Barium (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l Barium (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l Barium (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l 0.05 Barium (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l Barium (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l Barium (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l Barium (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l Barium (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l 0.07 Barium (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l Barium (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l 0.07 Barium (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l 0.07 Barium (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l 0.11 Barium (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l 0.05 Barium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l 0.05 Barium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l Barium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l Barium (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l Barium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l 0.05 Beryllium (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l J Beryllium (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l U Beryllium (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l U

24 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Beryllium (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l U Beryllium (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l U Beryllium (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Beryllium (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Beryllium (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l U Beryllium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l J Beryllium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l J Beryllium (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Beryllium (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Beryllium (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l J Beryllium (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l U Beryllium (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l J Beryllium (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Beryllium (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Beryllium (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l J Beryllium (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l U Beryllium (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l J Beryllium (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Beryllium (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l J Beryllium (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l J Beryllium (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l J Beryllium (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Beryllium (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Beryllium (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Beryllium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l J Beryllium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Beryllium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l U Beryllium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l U Beryllium (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Beryllium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Cadmium (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l U Cadmium (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l U Cadmium (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l J Cadmium (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l J

25 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Cadmium (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l Cadmium (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Cadmium (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Cadmium (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l U Cadmium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l U Cadmium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l J Cadmium (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Cadmium (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Cadmium (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l J Cadmium (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l U Cadmium (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l U Cadmium (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Cadmium (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l U Cadmium (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l J Cadmium (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l J Cadmium (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l U Cadmium (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Cadmium (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l J Cadmium (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Cadmium (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Cadmium (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l J Cadmium (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Cadmium (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l U Cadmium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l J Cadmium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l U Cadmium (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Cadmium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Chromium (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l J Chromium (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l J Chromium (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l J Chromium (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l J Chromium (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l J

26 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Chromium (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Chromium (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Chromium (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l J Chromium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l J Chromium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l J Chromium (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Chromium (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Chromium (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l U Chromium (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l J Chromium (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l J Chromium (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Chromium (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Chromium (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l J Chromium (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l J Chromium (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l J Chromium (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Chromium (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Chromium (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Chromium (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Chromium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l J Chromium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l J Chromium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l J Chromium (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l J Chromium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Chromium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Cobalt (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l J Cobalt (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l B Cobalt (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l J Cobalt (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l J Cobalt (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l Cobalt (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J

27 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Cobalt (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Cobalt (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l J Cobalt (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l J Cobalt (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l J Cobalt (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Cobalt (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Cobalt (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l B Cobalt (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l J Cobalt (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l J Cobalt (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Cobalt (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Cobalt (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l B Cobalt (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l J Cobalt (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l J Cobalt (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Cobalt (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l B Cobalt (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Cobalt (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l B Cobalt (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Cobalt (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Cobalt (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l J Cobalt (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l J Cobalt (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l J Cobalt (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l J Cobalt (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Cobalt (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Fluoride JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l J Fluoride JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l J Fluoride JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l J Fluoride JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l U Fluoride JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l U Fluoride JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Fluoride JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J

28 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Fluoride JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l J Fluoride JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l U Fluoride JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l U Fluoride JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Fluoride JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l U Fluoride JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Fluoride JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l J Fluoride JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l U Fluoride JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Fluoride JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l 0.17 J Fluoride JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l Fluoride JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l Fluoride JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l J Fluoride JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l J Fluoride JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l J Fluoride JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l J Fluoride JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Fluoride JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Lead (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l J Lead (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l J Lead (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l J Lead (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l J Lead (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l Lead (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Lead (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Lead (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l J

29 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Lead (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l J Lead (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l J Lead (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Lead (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Lead (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l J Lead (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l J Lead (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l J Lead (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Lead (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Lead (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l J Lead (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l J Lead (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l J Lead (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Lead (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Lead (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l U Lead (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l U Lead (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Lead (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Lead (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l J Lead (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l J Lead (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l J Lead (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l J Lead (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l Lead (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Lead (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Lithium (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l B Lithium (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l B Lithium (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l B Lithium (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l J Lithium (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l U Lithium (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l B Lithium (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l B Lithium (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l B Lithium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l U

30 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Lithium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l U Lithium (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Lithium (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l B Lithium (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l B Lithium (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l B Lithium (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l J Lithium (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Lithium (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l B Lithium (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l B Lithium (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l B Lithium (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l U Lithium (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Lithium (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l U Lithium (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Lithium (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Lithium (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l J Lithium (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Lithium (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Lithium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l B Lithium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l B Lithium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l B Lithium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l UJ Lithium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l J,B Lithium (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l U Lithium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Lithium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Mercury (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l J Mercury (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l J Mercury (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l J Mercury (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l 8.3E-06 U Mercury (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l U Mercury (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Mercury (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Mercury (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l 8.3E-06 U Mercury (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l 8.3E-06 U Mercury (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l 8.3E-06 U

31 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Mercury (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Mercury (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Mercury (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l J Mercury (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l J Mercury (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l 8.3E-06 U Mercury (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Mercury (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Mercury (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l J Mercury (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l J Mercury (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l 8.3E-06 U Mercury (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Mercury (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l 8.3E-06 U Mercury (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Mercury (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l 8.3E-06 U Mercury (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 8.3E-06 U Mercury (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Mercury (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l 8.3E-06 U Mercury (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Mercury (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l J Mercury (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l J Mercury (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l J Mercury (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l J Mercury (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l 8.3E-06 U Mercury (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Mercury (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Molybdenum (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l Molybdenum (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l Molybdenum (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l Molybdenum (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l Molybdenum (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l Molybdenum (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Molybdenum (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Molybdenum (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l J Molybdenum (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l J Molybdenum (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l J Molybdenum (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U

32 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Molybdenum (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l Molybdenum (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l Molybdenum (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l Molybdenum (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l Molybdenum (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l Molybdenum (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l Radium-226/228 JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW pci/l 1.39 U Radium-226/228 JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW pci/l 1.3 U Radium-226/228 JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW pci/l 1.66 U Radium-226/228 JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW pci/l 1.77 U Radium-226/228 JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW pci/l 1.79 U Radium-226/228 JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP pci/l 1.51 U Radium-226/228 JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP pci/l 1.57 U Radium-226/228 JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP pci/l 1.99 U Radium-226/228 JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP pci/l 1.64 U Radium-226/228 JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP pci/l 1.55 U Radium-226/228 JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP pci/l 1.86 U Radium-226/228 JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA pci/l 2.04 U

33 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Radium-226/228 JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA pci/l 1.63 U Radium-226/228 JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA pci/l 1.93 U Radium-226/228 JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA pci/l 1.44 U Radium-226/228 JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA pci/l 1.88 U Radium-226/228 JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA pci/l 1.61 U Radium-226/228 JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA pci/l 1.72 U Radium-226/228 JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA pci/l 1.68 U Radium-226/228 JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA pci/l 1.37 U Radium-226/228 JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA pci/l 1.73 U Radium-226/228 JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U pci/l 1.53 U Radium-226/228 JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U pci/l 1.47 U Radium-226/228 JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U pci/l 1.62 U Radium-226/228 JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U pci/l 1.86 U Radium-226/228 JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U pci/l 1.68 U Radium-226/228 JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U pci/l 1.76 U Radium-226/228 JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U pci/l 1.3 U Radium-226/228 JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U pci/l 1.51 U Radium-226/228 JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U pci/l 1.57 U Radium-226/228 JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U pci/l 1.7 U Radium-226/228 JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U pci/l 1.07 U Radium-226/228 JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U pci/l U Radium-226/228 JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U pci/l 1.66 U Radium-226/228 JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U pci/l 1.76 U Radium-226/228 JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U pci/l 1.48 U Radium-226/228 JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U pci/l 1.45 U Radium-226/228 JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD pci/l 1.09 J Radium-226/228 JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U pci/l 1.47 U Radium-226/228 JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD pci/l 1.32 U Radium-226/228 JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U pci/l 1.83 U Radium-226/228 JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD pci/l 1.45 U Radium-226/228 JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U pci/l 1.59 U Radium-226/228 JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U pci/l 1.81 U Radium-226/228 JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD pci/l 1.75 U Selenium (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l Selenium (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l Selenium (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l Selenium (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l Selenium (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l Selenium (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Selenium (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Selenium (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l J Selenium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l J Selenium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l J Selenium (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Selenium (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Selenium (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l

34 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Selenium (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l J Selenium (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l J Selenium (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Selenium (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l Selenium (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l Selenium (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l Selenium (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l Selenium (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l Selenium (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l J Selenium (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l Selenium (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l J Selenium (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l J Selenium (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Selenium (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l J Selenium (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Selenium (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l U Selenium (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Selenium (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Selenium (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l Selenium (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l Selenium (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l Selenium (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l Selenium (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l Selenium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l J Selenium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l U Selenium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Selenium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l J Selenium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l UJ Selenium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l J Selenium (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l J Selenium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Selenium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U Thallium (total) JRPS-MW-2 D 12/01/2017 Round 9 N JRPS-MW mg/l U Thallium (total) JRPS-MW-2 D 01/23/2018 Round-10 N JRPS-MW mg/l U Thallium (total) JRPS-MW-2 D 03/07/2018 Round-11 N JRPS-MW mg/l U Thallium (total) JRPS-MW-2 D 04/17/2018 Round-12 N JRPS-MW mg/l U Thallium (total) JRPS-MW-2 D 11/02/2018 Round-13 N JRPS-MW mg/l U Thallium (total) JRPS-MW-SA-1 U 11/29/2017 Round 9 N JRPS-MW-SA MS/MSD/DUP mg/l J Thallium (total) JRPS-MW-SA-1 U 01/24/2018 Round-10 N JRPS-MW-SA MS/MSD/DUP mg/l J Thallium (total) JRPS-MW-SA-1 U 03/06/2018 Round-11 N JRPS-MW-SA MS/MSD/DUP mg/l J Thallium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 N JRPS-MW-SA MS/MSD/DUP mg/l J Thallium (total) JRPS-MW-SA-1 U 04/18/2018 Round-12 FD JRPS-MW-SA DUPMS/MSD/DUP mg/l J Thallium (total) JRPS-MW-SA-1 U 11/02/2018 Round-13 N JRPS-MW-SA MS/MSD/DUP mg/l U Thallium (total) JRPS-MW-SA-4 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Thallium (total) JRPS-MW-SA-4 D 01/24/2018 Round-10 N JRPS-MW-SA mg/l J Thallium (total) JRPS-MW-SA-4 D 03/08/2018 Round-11 N JRPS-MW-SA mg/l J

35 James River Power Station (JRPS) Unfiltered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Thallium (total) JRPS-MW-SA-4 D 04/16/2018 Round-12 N JRPS-MW-SA mg/l J Thallium (total) JRPS-MW-SA-4 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Thallium (total) JRPS-MW-SA-5 D 12/01/2017 Round 9 N JRPS-MW-SA mg/l J Thallium (total) JRPS-MW-SA-5 D 01/23/2018 Round-10 N JRPS-MW-SA mg/l J Thallium (total) JRPS-MW-SA-5 D 03/07/2018 Round-11 N JRPS-MW-SA mg/l U Thallium (total) JRPS-MW-SA-5 D 04/17/2018 Round-12 N JRPS-MW-SA mg/l U Thallium (total) JRPS-MW-SA-5 D 11/05/2018 Round-13 N JRPS-MW-SA mg/l U Thallium (total) JRPS-PZ-SA-U-1 D 11/29/2017 Round 9 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-1 D 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Thallium (total) JRPS-PZ-SA-U-1 D 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-1 D 04/13/2018 Round-12 N JRPS-PZ-SA-U mg/l J Thallium (total) JRPS-PZ-SA-U-1 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-2 U 11/30/2017 Round 9 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-2 U 01/24/2018 Round-10 N JRPS-PZ-SA-U mg/l J Thallium (total) JRPS-PZ-SA-U-2 U 03/06/2018 Round-11 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-2 U 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-2 U 11/08/2018 Round-13 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-4 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-4 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-4 D 03/07/2018 Round-11 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-4 D 04/17/2018 Round-12 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-4 D 11/02/2018 Round-13 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-5 D 12/01/2017 Round 9 FD JRPS-PZ-SA-U FD mg/l U Thallium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 N JRPS-PZ-SA-U mg/l J Thallium (total) JRPS-PZ-SA-U-5 D 01/23/2018 Round-10 FD JRPS-PZ-SA-U FD mg/l U Thallium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-5 D 03/08/2018 Round-11 FD JRPS-PZ-SA-U FD mg/l U Thallium (total) JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U mg/l J Thallium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 N JRPS-PZ-SA-U mg/l U Thallium (total) JRPS-PZ-SA-U-5 D 11/05/2018 Round-13 FD JRPS-PZ-SA-U FD mg/l U

36 James River Power Station (JRPS) Filtered Sample Results for Appendix IV Constituents in Rounds 9-13 Constituent Name Well Up/Down Sample Result Sample Date Round Field Sample Id Units Gradient Type Value Val Quals Antimony JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l U Arsenic JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l U Barium JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l Beryllium JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l J Cadmium JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l U Chromium JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l J Cobalt JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l J Fluoride JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l U Lead JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l U Lithium JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l U Mercury JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l U Molybdenum JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l Radium-226/228 JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL pci/l 1.72 U Selenium JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l J Thallium JRPS-PZ-SA-U-5 D 04/16/2018 Round-12 N JRPS-PZ-SA-U FIL mg/l U

37 Figures

38 Legend SITE DIAGRAM FIGURE 1

39 Legend POTENTIOMETRIC ELEVATION 11/29/2017 FIGURE 2

40 Legend POTENTIOMETRIC ELEVATION 01/23/2018 FIGURE 3

41 Legend POTENTIOMETRIC ELEVATION 03/05/2018 FIGURE 4

42 Legend POTENTIOMETRIC ELEVATION 04/12/2018 FIGURE 5

43 Legend POTENTIOMETRIC ELEVATION 11/02/2018 FIGURE 6

44 Appendices

45 Appendix A Analytical Data Validation Reports

46 Data Validation Memorandum James River Power Station - Round 9 Groundwater Eight groundwater samples were collected between November 29 th and December 1 st at James River Power Station. Additionally, a field duplicate sample was collected at location JRPS-PZ- SA-U-5 at JRPS on December 1 st. There were no filtered aliquots collected due to elevated turbidity for this round of sampling at JRPS. The groundwater samples were collected by GeoEngineers and hand delivered to PDC Laboratories Springfield, Missouri location. The PDC Springfield Laboratory shipped sample aliquots to PDC s Peoria Laboratory for metals and wet chemistry analyses and PACE Analytical in Greensburg, PA for Total Radium 226/228. While samples were collected and immediately stored in coolers on ice, some of the samples were hand delivered on the same day to PDC Springfield and there was insufficient time for cooling the samples to <6 degrees Celsius. Therefore, the initial receipt temperatures at PDC Springfield were not used as basis for qualification. However, the temperatures for receipt at the Peoria Laboratory were evaluated and data were qualified if outside the acceptable range. The table below provides a crosswalk of sample IDs from field to the laboratories. Field Sample ID. PDC ID. PACE ID. JRPS-MW-SA JRPS-MW-SA JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U FD JRPS-MW The samples were analyzed at PDC Peoria, IL. for the following analyses: - Anions by EPA ph by SM 4500-H B - Total Dissolved Solids by SM 2540C - COD by SM 5220D - Conductivity by SM 2510B - Total Organic Halide by SW

47 JAMES RIVER POWER STATION - ROUND 9 GROUNDWATER - Total Organic Carbon by SM5310C - Total Metals by SW / Hardness (calculation) - Total Mercury by SW The samples were analyzed at PACE Greensburg, PA. for the following: - Total Radium (226/228) This quality assurance memorandum is based upon the validation of analytical data generated for round nine groundwater samples collected at James River Power Station. The analyses were reviewed for adherence to the specified analytical protocols in accordance with the analytical methods, laboratory standard operating procedures, Quality Assurance Project Plan (QAPP) for Coal Combustion Residual Landfill Monitoring at James River Power Station, January 2016, and the guidance of the USEPA Contract Laboratory Program National Functional Guidelines for Inorganic Data Review, August The findings of this quality assurance report are based upon the comprehensive review of the data deliverables from PDC and PACE reported according to the project QAPP and the EPA modified Level III format (including raw data). The review included chain of custody documentation, sample receipt conditions, holding times, field QA samples, laboratory QC samples, calibrations, and target compound identification and quantitation of results. The following definitions provide explanations of the data qualifiers that may be assigned to results based on this evaluation. The data qualifier definitions are consistent with the USEPA National Functional Guidelines for Inorganic Data Review. U- The compound was analyzed for but not detected (ND). J- The identification of the analyte is acceptable, but the quality assurance criteria indicate that the quantitative values may be outside the normal expected range of precision (i.e. the quantitative value is considered estimated). UJ- This flag is a combination of the U and J qualifiers. This indicates that the analyte is not present and the reported value is considered to be an estimated result. R- Data are considered to be rejected and shall not be used. This flag denotes the failure of quality control criteria such that it cannot be determined if the analyte is present or absent from the sample. B- The B flag is to be used for both organic and inorganic analyses when the analyte is found in the associated blank as well as the in the sample. The result is considered ND, and the reported value is considered to be an estimated quantitation limit. 2

48 JAMES RIVER POWER STATION - ROUND 9 GROUNDWATER INORGANIC DATA QUALIFIERS All results for the ph analyses were qualified as estimated due to exceedance of the method specific holding time. The ph method specific holding time requires the samples to be analyzed immediately, which is not possible to achieve when sending samples to an offsite laboratory. Analyzing the ph outside the method specific holding time could indicate a bias in the sample result. Field measurements for ph were also recorded in the field notes at the time of sample collection. Sample ID Analyte Holding Time Qualifier JRPS-MW-SA JRPS-MW-SA JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U FD JRPS-MW ph > immediately J In the SM2540C total dissolved solids (TDS) analysis the laboratory duplicate performed on samples JRPS-MW-SA exhibited high relative percent difference (RPD). Elevated duplicate RPD values are indicative of poor precision in the sample collection and/or analysis process. The TDS result in the parent sample was qualified J as estimated due to elevated duplicate RPD results. Sample ID Analyte Lab Duplicate RPD Qualifier JRPS-MW-SA TDS 9% RPD (lab limit 5%) J In the SM 5220 D chemical oxygen demand (COD) analysis performed on sample JRPS-MW-SA , the matrix spike and matrix spike duplicate recoveries exhibited low recoveries. Low spike recoveries in the MS/MSD are indicative of potential matrix interference resulting in a low bias for COD. The COD non-detect result in the parent sample was qualified as estimated UJ. Sample ID Analyte MS/MSD Recoveries Qualifier JRPS-MW-SA COD 74 / 78% UJ In the SW total organic halide (TOX) analysis the field duplicate performed on sample JRPS-PZ-SA-U exhibited a high relative percent difference (RPD) value. High field 3

49 JAMES RIVER POWER STATION - ROUND 9 GROUNDWATER duplicate RPD values are indicative of poor precision in the sample preparation and/or analysis process. The TOX result in the sample and field duplicate are reported as detected greater than the quantitation limit and were qualified J as estimated. Sample ID Analyte Field Duplicate RPD Qualifier JRPS-PZ-SA-U TOX 48% J In the SW /6020 metals analyses, iron, lithium, and nickel were present in blanks associated with some or all of the samples at less than 5 times the blank value. Detects of metals analytes in the method blanks indicates a potential contamination issue with the analytical process for the associated samples. The positive results for iron, lithium, and nickel in the samples listed below were qualified as B to indicate the potential high bias in the samples due to the blank contamination. Sample ID Analytes (less than 5x blank value) Qualifier JRPS-MW-SA Lithium, Nickel B JRPS-MW-SA Lithium, Nickel B JRPS-MW-SA Lithium, Nickel B JRPS-PZ-SA-U Lithium, Nickel B JRPS-PZ-SA-U Iron, Lithium B JRPS-PZ-SA-U Lithium, Nickel B JRPS-PZ-SA-U Lithium, Nickel B JRPS-PZ-SA-U FD Lithium, Nickel B JRPS-MW Lithium, Nickel B In the SW analyses for arsenic and antimony performed on sample JRPS-PZ-SA-U , the reported field duplicate RPDs were greater than 30%. High field duplicate RPD is indicative of poor precision in the sampling and/or analytical process. The positive results for arsenic and antimony in the associated parent sample and field duplicate were qualified as estimated J Sample ID Analyte RPD % Qualifier 4

50 JAMES RIVER POWER STATION - ROUND 9 GROUNDWATER JRPS-PZ-SA-U JRPS-PZ-SA-U FD Arsenic 55 J Antimony 95 J In order to achieve the lowest possible detection levels and facilitate the statistical analysis of the groundwater data, PDC was required to report positive results between the method detection level and quantitation limits as estimated detects with a J qualifier. RADIOLOGICAL DATA QUALIFIERS The laboratory control spike (LCS) for the Radium-228 analysis associated with all eight samples and the field duplicate demonstrated an elevated recovery. High LCS recovery is indicative of a potential high bias in the associated samples. The field duplicate was the only sample in the batch with positive total radium results was qualified as estimated J. Parent Sample ID Analyte LCS %R Qualifier JJRPS-PZ-SA-U FD Total Radium 155 J The reported results for total radium in all eight groundwater samples were less than the reported laboratory minimum detectable concentration (MDC) and thus, qualified as U not detected at the MDC. SUMMARY The inorganic and radiological analyses were performed acceptably, but required qualification for the minor QA/QC deficiencies noted above. The qualified data is included in Attachment I and the chains of custody are included in Attachment II of this report. It is recommended that the analytical data be used only with the qualifiers applied as part of this evaluation. Any aspects of the data, which are not discussed in this report, should be considered qualitatively and quantitatively valid as reported, based on the deliverables reviewed. 5

51 JAMES RIVER POWER STATION - ROUND 9 GROUNDWATER Attachment I JRPS Round 9 Groundwater Data 6

52 James River Upgradient GW Collected in Round 9 9 Location JRPS-MW-SA-1 JRPS-PZ-SA-U-2 Sample Date 11/29/ /30/2017 Sample Type Normal Normal Group Analyte Units Result / Qual Result / Qual Metal Aluminum (total) mg/l Metal Antimony (total) mg/l J J Metal Arsenic (total) mg/l J J Metal Barium (total) mg/l Metal Beryllium (total) mg/l J J Metal Boron (total) mg/l Metal Cadmium (total) mg/l J U Metal Calcium (total) mg/l Metal Chromium (total) mg/l J J Metal Cobalt (total) mg/l J J Metal Copper (total) mg/l J J Metal Iron (total) mg/l B Metal Lead (total) mg/l J U Metal Lithium (total) mg/l B B Metal Magnesium (total) mg/l Metal Manganese (total) mg/l Metal Mercury (total) mg/l J J Metal Molybdenum (total) mg/l J Metal Nickel (total) mg/l B J Metal Selenium (total) mg/l J J Metal Silver (total) mg/l U U Metal Sodium (total) mg/l Metal Thallium (total) mg/l J U Metal Zinc (total) mg/l J J Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l J Cation/Anion Sulfate mg/l Physical Properties Chemical Oxygen Demand (COD) mg/l 3.2 UJ 3.2 U Physical Properties Conductivity umhos/cm Physical Properties Hardness (as CACO3) mg/l Physical Properties ph ph Units Physical Properties Total Dissolved Solids (TDS) mg/l 360 J 460 Physical Properties Total Organic Carbon (TOC) mg/l 0.23 J 0.79 Physical Properties Total Organic Halides (TOX) mg/l J Radionuclide Radium-226/228 pci/l 1.51 U 1.76 U

53 James River Downgradient GW Collected in Round 9 Location JRPS-MW-2 JRPS-MW-SA-4 JRPS-MW-SA-5 JRPS-PZ-SA-U-1 JRPS-PZ-SA-U-4 JRPS-PZ-SA-U-5 JRPS-PZ-SA-U-5 Sample Date 12/01/ /01/ /01/ /29/ /01/ /01/ /01/2017 Sample Type Normal Normal Normal Normal Normal Field Duplicate Normal Group Analyte Units Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Metal Aluminum (total) mg/l Metal Antimony (total) mg/l J J J U U J J Metal Arsenic (total) mg/l J J J J J J J Metal Barium (total) mg/l Metal Beryllium (total) mg/l J J J J J J J Metal Boron (total) mg/l Metal Cadmium (total) mg/l U J U U U U U Metal Calcium (total) mg/l Metal Chromium (total) mg/l J J J J J J J Metal Cobalt (total) mg/l J J J J J J J Metal Copper (total) mg/l J J J J J J J Metal Iron (total) mg/l Metal Lead (total) mg/l J J J J J J J Metal Lithium (total) mg/l B B B B B B B Metal Magnesium (total) mg/l Metal Manganese (total) mg/l Metal Mercury (total) mg/l J J J J J J J Metal Molybdenum (total) mg/l Metal Nickel (total) mg/l B B B B J B B Metal Selenium (total) mg/l J J U J Metal Silver (total) mg/l U U U U J U U Metal Sodium (total) mg/l Metal Thallium (total) mg/l U J J U U U U Metal Zinc (total) mg/l J J J J J Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l J J J 0.17 J J J J Cation/Anion Sulfate mg/l Physical Properties Chemical Oxygen Demand (COD) mg/l 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U Physical Properties Conductivity umhos/cm Physical Properties Hardness (as CACO3) mg/l Physical Properties ph ph Units Physical Properties Total Dissolved Solids (TDS) mg/l Physical Properties Total Organic Carbon (TOC) mg/l 0.27 J 0.36 J 0.32 J 0.17 J 0.34 J 0.49 J 0.59 Physical Properties Total Organic Halides (TOX) mg/l U U U U J 0.01 J Radionuclide Radium-226/228 pci/l 1.39 U 2.04 U 1.61 U 1.53 U 1.07 U 1.09 J 1.45 U

54 JAMES RIVER POWER STATION - ROUND 9 GROUNDWATER Attachment II Chains of Custody 7

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56 QC Certificate James River Power Station Round 9 Groundwater Data Validation Memorandum SIGN-OFF CERTIFICATE FOR FINAL REVIEW OF DATA VALIDATION This certificate confirms that Jacobs has completed the review of the JRPS Round 9 Data Validation Memorandum. This memorandum meets the standards in the Groundwater Sampling and Analysis Plan (GeoEngineers 2016). Signature : _ Printed Name :_Chris Hickman_ Date approved: 02 / 6 / _2018

57 Data Validation Memorandum James River Power Station - Round 10 Groundwater Eight groundwater samples were collected between January 23 rd and 24 th at James River Power Station. Additionally, a field duplicate sample was collected at location JRPS-PZ-SA-U-5 on January 23 rd. There were no filtered aliquots collected due to elevated turbidity for this round of sampling at JRPS. The groundwater samples were collected by GeoEngineers and hand delivered to PDC Laboratories Springfield, Missouri location. The PDC Springfield Laboratory shipped sample aliquots to PDC s Peoria Laboratory for metals and wet chemistry analyses and PACE Analytical in Greensburg, PA for Total Radium 226/228. While samples were collected and immediately stored in coolers on ice, some of the samples were hand delivered on the same day to PDC Springfield and there was insufficient time for cooling the samples to <6 degrees Celsius. Therefore, the initial receipt temperatures at PDC Springfield were not used as basis for qualification. However, the temperatures for receipt at the Peoria Laboratory were evaluated and data were qualified if outside the acceptable range. The table below provides a crosswalk of sample IDs from field to the laboratories. Field Sample ID. PDC ID. PACE ID. JRPS-MW-SA JRPS-MW-SA JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U FD JRPS-MW The samples were analyzed at PDC Peoria, IL. for the following analyses: - Anions by EPA ph by SM 4500-H B - Total Dissolved Solids by SM 2540C - COD by SM 5220D - Conductivity by SM 2510B - Total Organic Halide by SW

58 JAMES RIVER POWER STATION - ROUND 10 GROUNDWATER - Total Organic Carbon by SM5310C - Total Metals by SW / Hardness (calculation) - Total Mercury by SW The samples were analyzed at PACE Greensburg, PA. for the following: - Total Radium (226/228) This quality assurance memorandum is based upon the validation of analytical data generated for round ten groundwater samples collected at James River Power Station. The analyses were reviewed for adherence to the specified analytical protocols in accordance with the analytical methods, laboratory standard operating procedures, Quality Assurance Project Plan (QAPP) for Coal Combustion Residual Landfill Monitoring at James River Power Station, January 2016, and the guidance of the USEPA Contract Laboratory Program National Functional Guidelines for Inorganic Data Review, August The findings of this quality assurance report are based upon the comprehensive review of the data deliverables from PDC and PACE reported according to the project QAPP and the EPA modified Level III format (including raw data). The review included chain of custody documentation, sample receipt conditions, holding times, field QA samples, laboratory QC samples, calibrations, and target compound identification and quantitation of results. The following definitions provide explanations of the data qualifiers that may be assigned to results based on this evaluation. The data qualifier definitions are consistent with the USEPA National Functional Guidelines for Inorganic Data Review. U- The compound was analyzed for but not detected (ND). J- The identification of the analyte is acceptable, but the quality assurance criteria indicate that the quantitative values may be outside the normal expected range of precision (i.e. the quantitative value is considered estimated). UJ- This flag is a combination of the U and J qualifiers. This indicates that the analyte is not present and the reported value is considered to be an estimated result. R- Data are considered to be rejected and shall not be used. This flag denotes the failure of quality control criteria such that it cannot be determined if the analyte is present or absent from the sample. B- The B flag is to be used for both organic and inorganic analyses when the analyte is found in the associated blank as well as the in the sample. The result is considered ND, and the reported value is considered to be an estimated quantitation limit. 2

59 JAMES RIVER POWER STATION - ROUND 10 GROUNDWATER INORGANIC DATA QUALIFIERS All results for the ph analyses were qualified as estimated due to exceedance of the method specific holding time. The ph method specific holding time requires the samples to be analyzed immediately, which is not possible to achieve when sending samples to an offsite laboratory. Analyzing the ph outside the method specific holding time could indicate a bias in the sample result. Field measurements for ph were also recorded in the field notes at the time of sample collection. Sample ID Analyte Holding Time Qualifier JRPS-MW-SA JRPS-MW-SA JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U FD JRPS-MW ph > immediately J In the SM 5220 D chemical oxygen demand (COD) analysis performed on sample JRPS-MW-SA , the matrix spike recovery exhibited low recoveries. Low spike recoveries in the MS/MSD are indicative of potential matrix interference resulting in a low bias for COD. The COD non-detect result in the parent sample was qualified as estimated UJ. Sample ID Analyte MS/MSD Recoveries Qualifier JRPS-MW-SA COD 73% MS UJ In the SW total organic halide (TOX) analysis the lab duplicate performed on sample JRPS-PZ-SA-U exhibited a high relative percent difference (RPD) value. The actual sample was reported as a detect for TOX above quantitation limit, and the lab duplicate was reported as a non-detect. High lab duplicate RPD values are indicative of poor precision in the sample preparation and/or analysis process. The TOX result in the parent sample was reported as detected greater than the quantitation limit and was qualified J as estimated. Sample ID Analyte Lab Duplicate RPD Qualifier JRPS-PZ-SA-U TOX Parent 7.7 mg/l Lab Dup - ND J 3

60 JAMES RIVER POWER STATION - ROUND 10 GROUNDWATER In the SW total organic halide (TOX) analysis the field duplicate performed on sample JRPS-PZ-SA-U exhibited a high relative percent difference (RPD) value. High field duplicate RPD values are indicative of poor precision in the sample preparation and/or analysis process. The TOX result in the sample and field duplicate are reported as detected greater than the quantitation limit and were qualified J as estimated. Sample ID Analyte Field Duplicate RPD Qualifier JRPS-PZ-SA-U TOX 57% J In the SW /6020 metals analyses, lithium, nickel, and cobalt were present in blanks associated with some or all of the samples at less than 5 times the blank value. Detects of metals analytes in the method blanks indicates a potential contamination issue with the analytical process for the associated samples. The positive results for iron, lithium, and nickel in the samples listed below were qualified as B to indicate the potential high bias in the samples due to the blank contamination. Sample ID Analytes (less than 5x blank value) Qualifier JRPS-MW-SA Lithium, Nickel B JRPS-MW-SA Lithium, Cobalt, Nickel B JRPS-MW-SA Lithium, Cobalt, Nickel B JRPS-PZ-SA-U Lithium, Cobalt B JRPS-PZ-SA-U Lithium, Cobalt, Nickel B JRPS-PZ-SA-U Lithium, Nickel B JRPS-PZ-SA-U Lithium, Nickel B JRPS-PZ-SA-U FD Lithium, Nickel B JRPS-MW Lithium, Cobalt, Nickel B In the SW analyses for arsenic, chromium, selenium, silver, and zinc performed on sample JRPS-PZ-SA-U , the reported field duplicate RPDs were greater than 30%. High field duplicate RPD is indicative of poor precision in the sampling and/or analytical process. The positive results for arsenic and antimony in the associated parent sample and field duplicate were qualified as estimated J 4

61 JAMES RIVER POWER STATION - ROUND 10 GROUNDWATER Sample ID Analyte RPD % Qualifier JRPS-PZ-SA-U JRPS-PZ-SA-U FD Arsenic 40% J Chromium 39% J Selenium 108% J Silver 41% J Zinc 35% J In order to achieve the lowest possible detection levels and facilitate the statistical analysis of the groundwater data, PDC was required to report positive results between the method detection level and quantitation limits as estimated detects with a J qualifier. RADIOLOGICAL DATA QUALIFIERS The reported results for total radium in all eight groundwater samples and the field duplicate were less than the reported laboratory minimum detectable concentration (MDC) and thus, qualified as U not detected at the MDC. SUMMARY The inorganic and radiological analyses were performed acceptably, but required qualification for the minor QA/QC deficiencies noted above. The qualified data is included in Attachment I and the chains of custody are included in Attachment II of this report. It is recommended that the analytical data be used only with the qualifiers applied as part of this evaluation. Any aspects of the data, which are not discussed in this report, should be considered qualitatively and quantitatively valid as reported, based on the deliverables reviewed. 5

62 JAMES RIVER POWER STATION - ROUND 10 GROUNDWATER Attachment I JRPS Round 10 Groundwater Data 6

63 James River Upgradient GW Collected in Round 100 Location JRPS-MW-SA-1 JRPS-PZ-SA-U-2 Sample Date 01/24/ /24/2018 Sample Type Normal Normal Group Analyte Units Result / Qual Result / Qual Metal Aluminum (total) mg/l Metal Antimony (total) mg/l U U Metal Arsenic (total) mg/l U J Metal Barium (total) mg/l Metal Beryllium (total) mg/l J U Metal Boron (total) mg/l Metal Cadmium (total) mg/l J J Metal Calcium (total) mg/l Metal Chromium (total) mg/l J J Metal Cobalt (total) mg/l J B Metal Copper (total) mg/l J J Metal Iron (total) mg/l Metal Lead (total) mg/l J J Metal Lithium (total) mg/l B B Metal Magnesium (total) mg/l Metal Manganese (total) mg/l Metal Mercury (total) mg/l J J Metal Molybdenum (total) mg/l J Metal Nickel (total) mg/l B B Metal Selenium (total) mg/l J J Metal Silver (total) mg/l U U Metal Sodium (total) mg/l Metal Thallium (total) mg/l J J Metal Zinc (total) mg/l J J Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l J J Cation/Anion Sulfate mg/l Physical Properties Chemical Oxygen Demand (COD) mg/l 3.2 UJ 3.2 U Physical Properties Hardness (as CACO3) mg/l Physical Properties ph ph Units 7.35 J 7.48 J Physical Properties Specific Conductance umhos/cm Physical Properties Total Dissolved Solids (TDS) mg/l Physical Properties Total Organic Carbon (TOC) mg/l Physical Properties Total Organic Halides (TOX) mg/l J U Radionuclide Radium-226/228 pci/l 1.57 U 1.3 U

64 James River Downgradient GW Collected in Round 100 Location JRPS-MW-2 JRPS-MW-SA-4 JRPS-MW-SA-5 JRPS-PZ-SA-U-1 JRPS-PZ-SA-U-4 JRPS-PZ-SA-U-5 JRPS-PZ-SA-U-5 Sample Date 01/23/ /24/ /23/ /24/ /23/ /23/ /23/2018 Sample Type Normal Normal Normal Normal Normal Field Duplicate Normal Group Analyte Units Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Metal Aluminum (total) mg/l Metal Antimony (total) mg/l U U U U U U J Metal Arsenic (total) mg/l J J J J U J J Metal Barium (total) mg/l Metal Beryllium (total) mg/l U J J U U U J Metal Boron (total) mg/l Metal Cadmium (total) mg/l U J J U U J U Metal Calcium (total) mg/l Metal Chromium (total) mg/l J U J J J J J Metal Cobalt (total) mg/l B B B B J J J Metal Copper (total) mg/l J J J J J J J Metal Iron (total) mg/l Metal Lead (total) mg/l J J J J J J J Metal Lithium (total) mg/l B B B B B B B Metal Magnesium (total) mg/l Metal Manganese (total) mg/l Metal Mercury (total) mg/l J J J J J J J Metal Molybdenum (total) mg/l Metal Nickel (total) mg/l B B B B B B B Metal Selenium (total) mg/l J J Metal Silver (total) mg/l U J U U U J J Metal Sodium (total) mg/l Metal Thallium (total) mg/l U J J J U U J Metal Zinc (total) mg/l J J J J Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l J J J J J J J Cation/Anion Sulfate mg/l Physical Properties Chem. Oxygen Demand (COD) mg/l 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U 3.2 U Physical Properties Hardness (as CACO3) mg/l Physical Properties ph ph Units 7.66 J 7.55 J 7.66 J 7.54 J 7.57 J 7.72 J 7.7 J Physical Properties Specific Conductance umhos/cm Physical Properties Total Dissolved Solids (TDS) mg/l Physical Properties Total Organic Carbon (TOC) mg/l 0.41 J Physical Properties Total Organic Halides (TOX) mg/l U U U Radionuclide Radium-226/228 pci/l 1.3 U 1.63 U 1.72 U 1.47 U U 1.32 U 1.47 U

65 JAMES RIVER POWER STATION - ROUND 10 GROUNDWATER Attachment II Chains of Custody 7

66

67 QC Certificate James River Power Station Round 10 Groundwater Data Validation Memorandum SIGN-OFF CERTIFICATE FOR FINAL REVIEW OF DATA VALIDATION This certificate confirms that Jacobs has completed the review of the JRPS Round 9 Data Validation Memorandum. This memorandum meets the standards in the Groundwater Sampling and Analysis Plan (GeoEngineers 2016). Signature : _ Printed Name :_Chris Hickman_ Date approved: 03/ 26 / 2018

68 Data Validation Memorandum James River Power Station - Round 11 Groundwater Eight groundwater samples were collected between March 6 th and 8 th at James River Power Station. Additionally, a field duplicate sample was collected at location JRPS-PZ-SA-U-5 on March 8 th. There were no filtered aliquots collected. The groundwater samples were collected by GeoEngineers and hand delivered to PDC Laboratories Springfield, Missouri location. The PDC Springfield Laboratory shipped sample aliquots to PDC s Peoria Laboratory for metals and wet chemistry analyses and PACE Analytical in Greensburg, PA for Total Radium 226/228. While samples were collected and immediately stored in coolers on ice, some of the samples were hand delivered on the same day to PDC Springfield and there was insufficient time for cooling the samples to <6 degrees Celsius. Therefore, the initial receipt temperatures at PDC Springfield were not used as basis for qualification. However, the temperatures for receipt at the Peoria Laboratory were evaluated and data were qualified if outside the acceptable range. The table below provides a crosswalk of sample IDs from field to the laboratories. Field Sample ID. PDC ID. PACE ID. JRPS-MW-SA JRPS-MW-SA JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U FD JRPS-MW The samples were analyzed at PDC Peoria, IL. for the following analyses: - Anions by EPA ph by SM 4500-H B - Total Dissolved Solids by SM 2540C - Total Metals by SW / Total Mercury by SW

69 JAMES RIVER POWER STATION - ROUND 11 GROUNDWATER The samples were analyzed at PACE Greensburg, PA. for the following: - Total Radium (226/228) This quality assurance memorandum is based upon the validation of analytical data generated for round eleven groundwater samples collected at James River Power Station. The analyses were reviewed for adherence to the specified analytical protocols in accordance with the analytical methods, laboratory standard operating procedures, Quality Assurance Project Plan (QAPP) for Coal Combustion Residual Landfill Monitoring at James River Power Station, January 2016, and the guidance of the USEPA Contract Laboratory Program National Functional Guidelines for Inorganic Data Review, August The findings of this quality assurance report are based upon the comprehensive review of the data deliverables from PDC and PACE reported according to the project QAPP and the EPA modified Level III format (including raw data). The review included chain of custody documentation, sample receipt conditions, holding times, field QA samples, laboratory QC samples, calibrations, and target compound identification and quantitation of results. The following definitions provide explanations of the data qualifiers that may be assigned to results based on this evaluation. The data qualifier definitions are consistent with the USEPA National Functional Guidelines for Inorganic Data Review. U- The compound was analyzed for but not detected (ND). J- The identification of the analyte is acceptable, but the quality assurance criteria indicate that the quantitative values may be outside the normal expected range of precision (i.e. the quantitative value is considered estimated). UJ- This flag is a combination of the U and J qualifiers. This indicates that the analyte is not present and the reported value is considered to be an estimated result. R- Data are considered to be rejected and shall not be used. This flag denotes the failure of quality control criteria such that it cannot be determined if the analyte is present or absent from the sample. B- The B flag is to be used for both organic and inorganic analyses when the analyte is found in the associated blank as well as the in the sample. The result is considered ND, and the reported value is considered to be an estimated quantitation limit. INORGANIC DATA QUALIFIERS All results for the ph analyses were qualified as estimated due to exceedance of the method specific holding time. The ph method specific holding time requires the samples to be analyzed immediately, which is not possible to achieve when sending samples to an offsite laboratory. Analyzing the ph outside the method specific holding time could indicate a bias in the sample 2

70 JAMES RIVER POWER STATION - ROUND 11 GROUNDWATER result. Field measurements for ph were also recorded in the field notes at the time of sample collection. Sample ID Analyte Holding Time Qualifier JRPS-MW-SA JRPS-MW-SA JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U FD JRPS-MW ph > immediately J In the SW /6020 metals analyses lithium was present in the digestion blank associated with all of the samples at less than 5 times the blank value. Detects of metals analytes in the method blanks indicates a potential contamination issue with the analytical process for the associated samples. The positive results for lithium in the samples listed below were qualified as B to indicate the potential high bias in the samples due to the blank contamination. Sample ID Analytes (less than 5x blank value) Qualifier JRPS-MW-SA Lithium B JRPS-MW-SA Lithium B JRPS-MW-SA Lithium B JRPS-PZ-SA-U Lithium B JRPS-PZ-SA-U Lithium B JRPS-PZ-SA-U Lithium B JRPS-PZ-SA-U FD Lithium B JRPS-MW Lithium B In the SW /6020 analyses for arsenic, lithium, and selenium performed on sample JRPS- PZ-SA-U , the reported field duplicate RPDs were greater than 30% or reported as a non-detect in one sample and a detect in the other. High field duplicate RPD is indicative of poor precision in the sampling and/or analytical process. The positive results for arsenic, lithium, and 3

71 JAMES RIVER POWER STATION - ROUND 11 GROUNDWATER selenium in the associated parent sample and field duplicate were qualified as estimated J. The non-detect parent samples for lithium and selenium were qualified as UJ. Sample ID Analyte RPD % Qualifier JRPS-PZ-SA-U JRPS-PZ-SA-U FD Arsenic 48% J Lithium ND in parent, detect in FD UJ/J Selenium ND in parent, detect in FD UJ/J In order to achieve the lowest possible detection levels and facilitate the statistical analysis of the groundwater data, PDC was required to report positive results between the method detection level and quantitation limits as estimated detects with a J qualifier. RADIOLOGICAL DATA QUALIFIERS The reported results for total radium in all eight groundwater samples and the field duplicate were less than the reported laboratory minimum detectable concentration (MDC) and thus, qualified as U not detected at the MDC. SUMMARY The inorganic and radiological analyses were performed acceptably, but required qualification for the minor QA/QC deficiencies noted above. The qualified data is included in Attachment I and the chains of custody are included in Attachment II of this report. It is recommended that the analytical data be used only with the qualifiers applied as part of this evaluation. Any aspects of the data, which are not discussed in this report, should be considered qualitatively and quantitatively valid as reported, based on the deliverables reviewed. 4

72 JAMES RIVER POWER STATION - ROUND 11 GROUNDWATER Attachment I JRPS Round 11 Groundwater Data 5

73 James River Upgradient GW Collected in Round 11 Location JRPS-MW-SA-1 JRPS-PZ-SA-U-2 Sample Date 03/06/ /06/2018 Sample Type Normal Normal Group Analyte Units Result / Qual Result / Qual Metal Antimony (total) mg/l U J Metal Arsenic (total) mg/l J J Metal Barium (total) mg/l Metal Beryllium (total) mg/l U U Metal Boron (total) mg/l Metal Cadmium (total) mg/l U J Metal Calcium (total) mg/l Metal Chromium (total) mg/l J J Metal Cobalt (total) mg/l J J Metal Lead (total) mg/l J U Metal Lithium (total) mg/l B B Metal Mercury (total) mg/l U U Metal Molybdenum (total) mg/l J Metal Selenium (total) mg/l J U Metal Thallium (total) mg/l J U Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l J Cation/Anion Sulfate mg/l Physical Properties ph ph Units 7.3 J 7.44 J Physical Properties Total Dissolved Solids (TDS) mg/l Radionuclide Radium-226/228 pci/l 1.99 U 1.51 U

74 James River Downgradient GW Collected in Round 11 Location JRPS-MW-2 JRPS-MW-SA-4 JRPS-MW-SA-5 JRPS-PZ-SA-U-1 JRPS-PZ-SA-U-4 JRPS-PZ-SA-U-5 JRPS-PZ-SA-U-5 Sample Date 03/07/ /08/ /07/ /06/ /07/ /08/ /08/2018 Sample Type Normal Normal Normal Normal Normal Field Duplicate Normal Group Analyte Units Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Metal Antimony (total) mg/l U U U U U U U Metal Arsenic (total) mg/l J J U J J J J Metal Barium (total) mg/l Metal Beryllium (total) mg/l U U U U U U U Metal Boron (total) mg/l Metal Cadmium (total) mg/l J U J U J U U Metal Calcium (total) mg/l Metal Chromium (total) mg/l J J J J J J J Metal Cobalt (total) mg/l J J J J J J J Metal Lead (total) mg/l J J J J J J J Metal Lithium (total) mg/l B B B B B J,B UJ Metal Mercury (total) mg/l J J J J J J J Metal Molybdenum (total) mg/l Metal Selenium (total) mg/l J J J UJ Metal Thallium (total) mg/l U J U U U U U Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l J J J J J J J Cation/Anion Sulfate mg/l Physical Properties ph ph Units 7.62 J 7.37 J 7.39 J 7.38 J 7.42 J 7.45 J 7.48 J Physical Properties Total Dissolved Solids (TDS) mg/l Radionuclide Radium-226/228 pci/l 1.66 U 1.93 U 1.68 U 1.62 U 1.66 U 1.45 U 1.83 U

75 JAMES RIVER POWER STATION - ROUND 11 GROUNDWATER Attachment II Chains of Custody 6

76

77 QC Certificate James River Power Station Round 11 Groundwater Data Validation Memorandum SIGN-OFF CERTIFICATE FOR FINAL REVIEW OF DATA VALIDATION This certificate confirms that Jacobs has completed the review of the JRPS Round 9 Data Validation Memorandum. This memorandum meets the standards in the Groundwater Sampling and Analysis Plan (GeoEngineers 2016). Signature : _ Printed Name :_Chris Hickman_ Date approved: 05/03 / 2018

78 Data Validation Memorandum James River Power Station - Round 12 Groundwater Groundwater samples were collected from eight wells between April 12 th and 18 th at James River Power Station. Samples were collected on two different dates from monitoring well JRPS-MW- SA-1. A filtered aliquot was collected with the parent sample at the well on 04/12/18 due to elevated turbidity. GeoEngineers returned to the well and collected another sample at JRPS- MW-SA-1 along with a field duplicate on 04/18/18 without the elevated turbidity issues. GeoEngineers verbally instructed PDC to cancel the sample and filtered aliquot collected on 04/12/18 at the well; however, the samples from both dates were analyzed and reported. After the initial data review, three samples were noted as having detects for lithium that were significantly larger than the historical values at the wells. The three samples with suspiciously high lithium values were re-prepped and re-analyzed for lithium by PDC within the method holding times. These samples are identified in the sample identification crosswalk below the following paragraph with an RE1 appended to the end of the lab sample ID. The re-analysis results were consistent with the historical values at the wells and deemed more usable as part of this review. The groundwater samples were collected by GeoEngineers and hand delivered to PDC Laboratories Springfield, Missouri location. The PDC Springfield Laboratory shipped sample aliquots to PDC s Peoria Laboratory for metals and wet chemistry analyses and PACE Analytical in Greensburg, PA for Total Radium 226/228. While samples were collected and immediately stored in coolers on ice, some of the samples were hand delivered on the same day to PDC Springfield and there was insufficient time for cooling the samples to <6 degrees Celsius. Therefore, the initial receipt temperatures at PDC Springfield were not used as basis for qualification. However, the temperatures for receipt at the Peoria Laboratory were evaluated and data were qualified if outside the acceptable range. The table below provides a crosswalk of sample IDs from field to the laboratories. Field Sample ID. PDC ID. PACE ID. JRPS-MW-SA JRPS-MW-SA FIL JRPS-PZ-SA-U JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U FIL JRPS-MW-SA JRPS-MW-SA FD JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U

79 JAMES RIVER POWER STATION - ROUND 12 GROUNDWATER JRPS-MW JRPS-PZ-SA-U JRPS-MW-SA RE RE1 NA NA JRPS-MW-SA RE1 NA The samples were analyzed at PDC Peoria, IL. for the following analyses: - Anions by EPA ph by SM 4500-H B - Total Dissolved Solids by SM 2540C - Total Metals by SW / Total Mercury by SW The samples were analyzed at PACE Greensburg, PA for the following: - Total Radium (226/228) This quality assurance memorandum is based upon the validation of analytical data generated for round twelve groundwater samples collected at James River Power Station. The analyses were reviewed for adherence to the specified analytical protocols in accordance with the analytical methods, laboratory standard operating procedures, Quality Assurance Project Plan (QAPP) for Coal Combustion Residual Landfill Monitoring at James River Power Station, January 2016, and the guidance of the USEPA Contract Laboratory Program National Functional Guidelines for Inorganic Data Review, August The findings of this quality assurance report are based upon the comprehensive review of the data deliverables from PDC and PACE reported according to the project QAPP and the EPA modified Level III format (including raw data). The review included chain of custody documentation, sample receipt conditions, holding times, field QA samples, laboratory QC samples, calibrations, and target compound identification and quantitation of results. The following definitions provide explanations of the data qualifiers that may be assigned to results based on this evaluation. The data qualifier definitions are consistent with the USEPA National Functional Guidelines for Inorganic Data Review. U- The compound was analyzed for but not detected (ND). J- The identification of the analyte is acceptable, but the quality assurance criteria indicate that the quantitative values may be outside the normal expected range of precision (i.e. the quantitative value is considered estimated). UJ- This flag is a combination of the U and J qualifiers. This indicates that the analyte is not present and the reported value is considered to be an estimated result. 2

80 JAMES RIVER POWER STATION - ROUND 12 GROUNDWATER R- Data are considered to be rejected and shall not be used. This flag denotes the failure of quality control criteria such that it cannot be determined if the analyte is present or absent from the sample. B- The B flag is to be used for both organic and inorganic analyses when the analyte is found in the associated blank as well as the in the sample. The result is considered ND, and the reported value is considered to be an estimated quantitation limit. INORGANIC DATA QUALIFIERS The reviewer evaluated the sample collection conditions for the samples collected at JRPS-MW- SA-1 on 04/12/18 and 04/18/2018, and determined that the results for the sample and filtered aliquot collected on 04/12/18 with elevated turbidity were collected with water quality parameters exceeding the conditions outlined in the SAP for sample collection. The results reported for all analytes for sample JRPS-MW-SA and the filtered aliquot, JRPS-MW- SA FIL, were qualified as R to indicate the data from these two samples is not to be used. The results for JRPS-MW-SA and the associated field duplicate collected with stable water quality parameters will be used in the statistical analysis and for decision making purposes. Sample ID Analyte Sampling Conditions Qualifier JRPS-MW-SA JRPS-MW-SA FIL TDS, ph, anions, metals, total radium Elevated turbidity R Samples JRPS-PZ-SA-U , JRPS-MW-SA , and JRPS-PZ-SA-U were reprepped and re-analyzed within holding time due to the reported values of lithium being significantly larger than the historical values at the wells. The re-analysis results for the three samples were consistent with historical values at the well and deemed more usable by the reviewer. The re-analysis samples for lithium are appended with RE1. The original sample results for lithium in these three samples were qualified as R and not usable likely due to laboratory interference or other error. Sample ID Analyte Qualifier JRPS-PZ-SA-U JRPS-MW-SA JRPS-PZ-SA-U Lithium R All results for the ph analyses were qualified as estimated due to exceedance of the method specific holding time. The ph method specific holding time requires the samples to be analyzed immediately, which is not possible to achieve when sending samples to an offsite laboratory. 3

81 JAMES RIVER POWER STATION - ROUND 12 GROUNDWATER Analyzing the ph outside the method specific holding time could indicate a bias in the sample result. Field measurements for ph were also recorded in the field notes at the time of sample collection. Sample ID Analyte Holding Time Qualifier JRPS-MW-SA JRPS-MW-SA FIL JRPS-PZ-SA-U JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U FIL JRPS-MW-SA JRPS-MW-SA FD JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-MW ph > immediately J In the SM2540C total dissolved solids (TDS) analysis the laboratory duplicates performed on sample JRPS-MW-SA exhibited high relative percent difference (RPD). Elevated duplicate RPD values are indicative of poor precision in the sample collection and/or analysis process. The TDS results in the parent sample was qualified J as estimated due to elevated duplicate RPD results. Sample ID Analyte Lab Duplicate RPD Qualifier JRPS-MW-SA TDS 8% RPD (lab limit 5%) J In the SW /6020 metals analyses lithium was present in the digestion blank associated with all of the samples at less than 5 times the blank value. Detects of metals analytes in the method blanks indicates a potential contamination issue with the analytical process for the associated samples. The positive results for lithium in the samples listed below were qualified as B to indicate the potential high bias in the samples due to the blank contamination. Sample ID Analytes (less than 5x blank value) Qualifier JRPS-MW-SA Lithium B In the SW /6020 analyses for beryllium, lead, and thallium performed on sample JRPS- MW-SA , the reported field duplicate RPDs were greater than 30% or reported as a non-detect in one sample and a detect in the other. High field duplicate RPD is indicative of poor 4

82 JAMES RIVER POWER STATION - ROUND 12 GROUNDWATER precision in the sampling and/or analytical process. The positive results for beryllium, lead, and thallium in the associated parent sample and field duplicate were qualified as estimated J. Sample ID Analyte RPD % Qualifier JRPS-MW-SA JRPS-MW-SA FD Beryllium 58% J Lead 82% J Thaalium 59% J In order to achieve the lowest possible detection levels and facilitate the statistical analysis of the groundwater data, PDC was required to report positive results between the method detection level and quantitation limits as estimated detects with a J qualifier. RADIOLOGICAL DATA QUALIFIERS As noted previously in the report, all analyses including the total radium results for JRPS-MW- SA and JRPS-MW-SA FIL were not used due to elevated turbidty at the time of collection and flagged as rejected R. The well was resampled with acceptable conditions on 04/18/2018 and the results for JRPS-MW-SA and JRPS-MW-SA FD are considered usable. The reported results for total radium in all the other groundwater samples and the field duplicate were less than the reported laboratory minimum detectable concentration (MDC) and thus, qualified as U not detected at the MDC. SUMMARY The inorganic and radiological analyses were performed acceptably, but required qualification for the minor QA/QC deficiencies noted above. The qualified data is included in Attachment I and the chains of custody are included in Attachment II of this report. It is recommended that the analytical data be used only with the qualifiers applied as part of this evaluation. Any aspects of the data, which are not discussed in this report, should be considered qualitatively and quantitatively valid as reported, based on the deliverables reviewed. 5

83 JAMES RIVER POWER STATION - ROUND 12 GROUNDWATER Attachment I JRPS Round 12 Groundwater Data 6

84 JRPS Upgradient GW Collected in Round 12 Location JRPS-MW-SA-1 JRPS-MW-SA-1 JRPS-PZ-SA-U-2 Sample Date 04/18/ /18/ /17/2018 Sample Type Field Duplicate Normal Normal Group Analyte Units Result / Qual Result / Qual Result / Qual Metal Antimony (total) mg/l U U U Metal Arsenic (total) mg/l U U J Metal Barium (total) mg/l Metal Beryllium (total) mg/l J J U Metal Boron (total) mg/l Metal Cadmium (total) mg/l J UJ U Metal Calcium (total) mg/l Metal Chromium (total) mg/l J J J Metal Cobalt (total) mg/l J J J Metal Lead (total) mg/l J J J Metal Lithium (total) mg/l U U U Metal Magnesium (total) mg/l Metal Mercury (total) mg/l U U U Metal Molybdenum (total) mg/l J J Metal Selenium (total) mg/l J J U Metal Thallium (total) mg/l J J U Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l U U J Cation/Anion ph ph Units 7.38 J 7.38 J 7.5 J Cation/Anion Sulfate mg/l Physical Properties Hardness (as CACO3) mg/l Physical Properties Total Dissolved Solids (TDS) mg/l Radionuclide Radium-226/228 pci/l 1.55 U 1.64 U 1.57 U

85 JRPS Downgradient GW Collected in Round 12 Location JRPS-MW-2 JRPS-MW-SA-4 JRPS-MW-SA-5 JRPS-PZ-SA-U-1 JRPS-PZ-SA-U-4 JRPS-PZ-SA-U-5 Sample Date 04/17/ /16/ /17/ /13/ /17/ /16/2018 Sample Type Normal Normal Normal Normal Normal Normal Group Analyte Units Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Metal Antimony (total) mg/l U U U U U U Metal Arsenic (total) mg/l J J J J J J Metal Barium (total) mg/l Metal Beryllium (total) mg/l U J J J J U Metal Boron (total) mg/l Metal Cadmium (total) mg/l J U U J J U Metal Calcium (total) mg/l Metal Chromium (total) mg/l J J J J J J Metal Cobalt (total) mg/l J J J J J J Metal Lead (total) mg/l J J J J J Metal Lithium (total) mg/l J U U Metal Magnesium (total) mg/l Metal Mercury (total) mg/l U U U U U U Metal Molybdenum (total) mg/l Metal Selenium (total) mg/l J J J Metal Thallium (total) mg/l U J U J U J Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l U U U U U U Cation/Anion ph ph Units 7.52 J 7.48 J 7.53 J 7.55 J 7.43 J 7.44 J Cation/Anion Sulfate mg/l Physical Properties Hardness (as CACO3) mg/l Physical Properties Total Dissolved Solids (TDS) mg/l Radionuclide Radium-226/228 pci/l 1.77 U 1.44 U 1.37 U 1.86 U 1.76 U 1.59 U

86 JAMES RIVER POWER STATION - ROUND 12 GROUNDWATER Attachment II Chains of Custody 7

87

88

89

90 Data Validation Memorandum James River Power Station - Round 13 Groundwater Groundwater samples were collected from eight wells between November 2 nd and 8 th at James River Power Station. Additionally, a field duplicate sample was collected at location JRPS-PZ- SA-U-5 on November 5 th. There were no filtered aliquots collected with Round 13 at JRPS. The groundwater samples were collected by GeoEngineers and hand delivered to PDC Laboratories Springfield, Missouri location. The PDC Springfield Laboratory shipped sample aliquots to PDC s Peoria Laboratory for metals and wet chemistry analyses and PACE Analytical in Greensburg, PA for Total Radium 226/228. While samples were collected and immediately stored in coolers on ice, some of the samples were hand delivered on the same day to PDC Springfield and there was insufficient time for cooling the samples to <6 degrees Celsius. Therefore, the initial receipt temperatures at PDC Springfield were not used as basis for qualification. However, the temperatures for receipt at the Peoria Laboratory were evaluated and data were qualified if outside the acceptable range. The table below provides a crosswalk of sample IDs from field to the laboratories. Field Sample ID. PDC ID. PACE ID. JRPS-MW-SA JRPS-MW-SA JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U FD JRPS-MW JRPS-PZ-SA-U The samples were analyzed at PDC Peoria, IL. for the following analyses: - Anions by EPA ph by SM 4500-H B - Total Dissolved Solids by SM 2540C - Total Metals by SW / Total Mercury by SW The samples were analyzed at PACE Greensburg, PA for the following: - Total Radium (226/228) 1

91 JAMES RIVER POWER STATION - ROUND 13 GROUNDWATER This quality assurance memorandum is based upon the validation of analytical data generated for round thirteen groundwater samples collected at James River Power Station. The analyses were reviewed for adherence to the specified analytical protocols in accordance with the analytical methods, laboratory standard operating procedures, Quality Assurance Project Plan (QAPP) for Coal Combustion Residual Landfill Monitoring at James River Power Station, January 2016, and the guidance of the USEPA Contract Laboratory Program National Functional Guidelines for Inorganic Data Review, August The findings of this quality assurance report are based upon the comprehensive review of the data deliverables from PDC and PACE reported according to the project QAPP and the EPA modified Level III format (including raw data). The review included chain of custody documentation, sample receipt conditions, holding times, field QA samples, laboratory QC samples, calibrations, and target compound identification and quantitation of results. The following definitions provide explanations of the data qualifiers that may be assigned to results based on this evaluation. The data qualifier definitions are consistent with the USEPA National Functional Guidelines for Inorganic Data Review. U- The compound was analyzed for but not detected (ND). J- The identification of the analyte is acceptable, but the quality assurance criteria indicate that the quantitative values may be outside the normal expected range of precision (i.e. the quantitative value is considered estimated). UJ- This flag is a combination of the U and J qualifiers. This indicates that the analyte is not present, and the reported value is considered to be an estimated result. R- Data are considered to be rejected and shall not be used. This flag denotes the failure of quality control criteria such that it cannot be determined if the analyte is present or absent from the sample. B- The B flag is to be used for both organic and inorganic analyses when the analyte is found in the associated blank as well as the in the sample. The result is considered ND, and the reported value is considered to be an estimated quantitation limit. INORGANIC DATA QUALIFIERS All results for the ph analyses were qualified as estimated due to exceedance of the method specific holding time. The ph method specific holding time requires the samples to be analyzed immediately, which is not possible to achieve when sending samples to an offsite laboratory. Analyzing the ph outside the method specific holding time could indicate a bias in the sample result. Field measurements for ph were also recorded in the field notes at the time of sample collection. 2

92 JAMES RIVER POWER STATION - ROUND 13 GROUNDWATER Sample ID Analyte Holding Time Qualifier JRPS-MW-SA JRPS-MW-SA JRPS-MW-SA JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U JRPS-PZ-SA-U FD JRPS-MW JRPS-PZ-SA-U ph > immediately J In the SM2540C total dissolved solids (TDS) analysis the laboratory duplicate performed on sample JRPS-MW-SA exhibited high relative percent difference (RPD). Elevated duplicate RPD values are indicative of poor precision in the sample collection and/or analysis process. The TDS result in the parent sample was qualified J as estimated due to elevated duplicate RPD result. Sample ID Analyte Lab Duplicate RPD Qualifier JRPS-MW-SA TDS 10% RPD (lab limit 5%) J The metals results for arsenic, calcium, and thallium originally reported in sample JRPS-MW were not consistent with the results from the previous 12 rounds. Jacobs request, PDC re-analyzed the sample for arsenic, calcium, and thallium. Both sets of data were reviewed and there were no QA/QC outliers with either analysis. The re-analysis data were more consistent with previous results and were used for statistical analysis and reporting purposes. In order to achieve the lowest possible detection levels and facilitate the statistical analysis of the groundwater data, PDC was required to report positive results between the method detection level and quantitation limits as estimated detects with a J qualifier. RADIOLOGICAL DATA QUALIFIERS The reported results for total radium in all groundwater samples and the field duplicate were less than the reported laboratory minimum detectable concentration (MDC) and thus, qualified as U not detected at the MDC. SUMMARY The inorganic and radiological analyses were performed acceptably, but required qualification for the minor QA/QC deficiencies noted above. The qualified data is included in Attachment I and the chains of custody are included in Attachment II of this report. It is recommended that the analytical data be used only with the qualifiers applied as part of this evaluation. Any 3

93 JAMES RIVER POWER STATION - ROUND 13 GROUNDWATER aspects of the data, which are not discussed in this report, should be considered qualitatively and quantitatively valid as reported, based on the deliverables reviewed. 4

94 JAMES RIVER POWER STATION - ROUND 13 GROUNDWATER Attachment I JRPS Round 13 Groundwater Data 5

95 JRPS Upgradient GW Collected in Round 13 Location JRPS-MW-SA-1 JRPS-PZ-SA-U-2 Sample Date 11/02/ /08/2018 Sample Type Normal Normal Group Analyte Units Result / Qual Result / Qual Metal Antimony (total) mg/l U U Metal Arsenic (total) mg/l U U Metal Barium (total) mg/l Metal Beryllium (total) mg/l U U Metal Boron (total) mg/l Metal Cadmium (total) mg/l U U Metal Calcium (total) mg/l Metal Chromium (total) mg/l U U Metal Cobalt (total) mg/l U U Metal Lead (total) mg/l U U Metal Lithium (total) mg/l U J Metal Mercury (total) mg/l U U Metal Molybdenum (total) mg/l U Metal Selenium (total) mg/l U U Metal Thallium (total) mg/l U U Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l U J Cation/Anion ph ph Units 7.16 J 7.28 J Cation/Anion Sulfate mg/l Physical Properties Total Dissolved Solids (TDS) mg/l 370 J 440 Radionuclide Radium-226/228 pci/l 1.86 U 1.7 U

96 JRPS Downgradient GW Collected in Round 133 Location JRPS-MW-2 JRPS-MW-SA-4 JRPS-MW-SA-5 JRPS-PZ-SA-U-1 JRPS-PZ-SA-U-4 JRPS-PZ-SA-U-5 JRPS-PZ-SA-U-5 Sample Date 11/02/ /05/ /05/ /05/ /02/ /05/ /05/2018 Sample Type Normal Normal Normal Normal Normal Field Duplicate Normal Group Analyte Units Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Result / Qual Metal Antimony (total) mg/l U U U U U U U Metal Arsenic (total) mg/l U U U U U U U Metal Barium (total) mg/l Metal Beryllium (total) mg/l U U U U U U U Metal Boron (total) mg/l Metal Cadmium (total) mg/l U U U U U U Metal Calcium (total) mg/l Metal Chromium (total) mg/l J U U U U U U Metal Cobalt (total) mg/l U U U U U U Metal Lead (total) mg/l U U U U U U Metal Lithium (total) mg/l U U U U U U U Metal Mercury (total) mg/l U U U U U U U Metal Molybdenum (total) mg/l Metal Selenium (total) mg/l U U U U Metal Thallium (total) mg/l U U U U U U U Cation/Anion Chloride mg/l Cation/Anion Fluoride mg/l U U U U U U U Cation/Anion ph ph Units 7.36 J 7.15 J 7.34 J 7.21 J 7.35 J 7.31 J 7.26 J Cation/Anion Sulfate mg/l Physical Properties Total Dissolved Solids (TDS) mg/l Radionuclide Radium-226/228 pci/l 1.79 U 1.88 U 1.73 U 1.68 U 1.48 U 1.75 U 1.81 U

97 JAMES RIVER POWER STATION - ROUND 13 GROUNDWATER Attachment II Chains of Custody 6

98 Page 31 of 82 Page 30 of 50

99 Page 49 of 82 Page 48 of 50

100 QC Certificate James River Power Station Round 13 Groundwater Data Validation Memorandum SIGN-OFF CERTIFICATE FOR FINAL REVIEW OF DATA VALIDATION This certificate confirms that Jacobs has completed the review of the JRPS Round 12 Data Validation Memorandum. This memorandum meets the standards in the Groundwater Sampling and Analysis Plan (GeoEngineers 2016). Signature : _ Printed Name :_Chris Hickman_ Date approved: 1/29 / 2019

101 Appendix B Statistical Analysis Report

102 STATISTICAL ANALYSIS REPORT JAMES RIVER POWER STATION (JRPS) Prepared for: City Utilities of Springfield 301 E. Central Street Springfield, Missouri Prepared by: 125 Broadway Avenue Oak Ridge, Tennessee, January 2019

103 Table of Contents Statistical Analysis Approach... 2 CCR Appendix III Constituent List... 6 Boron... 7 Calcium... 9 Chloride Fluoride ph Sulfate Total Dissolved Solids (TDS) Statistical Analysis Summary for the CCR Appendix III Constituent List CCR Appendix IV Constituent List Antimony Arsenic Barium Beryllium Cadmium Chromium Cobalt Fluoride Lead Lithium Mercury Molybdenum Radium 226/228 Combined Selenium Thallium Statistical Analysis Summary for the CCR Appendix IV Constituent List Statistical Analysis Summary for All CCR Constituents Separated by Well

104 Statistical Analysis Approach In April 2015, the United States Environmental Protection Agency (USEPA) issued new regulations regarding the disposal of coal combustion residuals (CCR) in landfills and surface impoundments under 40 CFR 257, Subpart D. Facilities regulated under the CCR Rule are required to develop a groundwater monitoring system to evaluate if CCR materials are affecting groundwater quality. As a part of the evaluation, the analytical data collected during the sampling events must undergo statistical analysis to identify statistically significant increases in analyte concentrations above background levels. The detailed procedures for sampling and analysis required under (a)-(e) are documented in the Groundwater Sampling and Analysis Plan (SAP) (GeoEngineers 2016), incorporated herein by reference and included in the CCR operating record as set forth in section To comply with the CCR Rule, statistical analyses were performed on the JRPS groundwater analytical results. The data used for statistical analysis consisted of analytical laboratory results from the first ten rounds of samples collected from the JRPS groundwater monitoring network that were validated by the project chemist. Constituent concentration levels in the downgradient monitoring wells were compared to the constituent concentration(s) of the upgradient monitoring well(s) to determine if a statistically significant increase is present. This is intended to show if any elevated constituent concentrations could be a result of CCR materials or if constituent amounts from the monitoring wells are simply due to natural seasonal groundwater variation. The calculations to test for a statistically significant increase from background groundwater data were performed for each constituent using the Sanitas statistical analysis software using the prediction interval module. The prediction interval approach for determining statistical significance is included in 40 CFR (f)(3) of the CCR Rule, as one of five acceptable statistical approaches. The Sanitas software calculates the prediction limit using parametric or non-parametric methods, which are determined based on the percentage of non-detections and whether or not the data passes normality tests. Once the groundwater samples were collected by the field staff and sent to an approved certified analytical laboratory, the concentration results for each constituent were validated by the project chemist. The validated laboratory data were then joined with the field chain of custody information and loaded into a database. If during the data verification/validation process, the project chemist determines that some lab data results need to be flagged as rejected then the industry standard validation qualifiers of R is applied and the data is filtered out and not used If the data is below the detection limit of the lab instrument, these non-detections were flagged with a U qualifier that flags the Sanitas software to treat it appropriately. To maintain a consistent unit of measure, all data except ph and Radium 226/228 were converted to (mg/l). The laboratory results were loaded into the database along with the monitoring well location name and a flow relationship code. The flow relationship codes are either Upgradient or Downgradient of the utility waste landfill that is determined from ongoing analysis of the potentiometric surface of the groundwater. These flow relationship codes are identified in the tables below for each well at JRPS. The table below shows the list of well names from the monitoring network that were abbreviated so they could be used in the Sanitas statistical software due to a location name length limitation. JRPS Monitoring Wells and Flow Relationship to the Landfill Well Name Abbreviated Sanitas Well Name Alias Flow Relationship to the Landfill JRPS-MWSA1 JR-MWSA1 Upgradient JRPS-PZSAU2 JR-PZSAU2 Upgradient JRPS-MW-2 JR-MW2 Downgradient JRPS-MWSA4 JR-MWSA4 Downgradient JRPS-MWSA5 JR-MWSA5 Downgradient JRPS-PZSAU1 JR-PZSAU1 Downgradient JRPS-PZSAU4 JR-PZSAU4 Downgradient JRPS-PZSAU5 JR-PZSAU5 Downgradient 2

105 As part of the statistical analysis of the data, a USEPA power curve was used to ensure that the number of upgradient well samples was adequate to meet the USEPA recommendations for statistical power. Statistical power is a test to determine the number of samples required to have confidence false positives are minimized in the statistical analysis results. A false positive is a case where a constituent is shown to exceed the statistical prediction limit where it was really within the limit. The USEPA power curve analysis showed that using both wells JT-MWPZ01D and JT- MWPZ09D on ten rounds of sampling for the upgradient data met the USEPA recommendations for statistical power and is shown in the figure below. The solid dark line is the USEPA recommendation for statistical power and the dashed blue line is the power curve using both JT-MWPZ01D and JT-MWPZ09D as the upgradient data. The vertical axis shows the statistical power to not report false positives and false negatives where being close to 100% is best. The horizontal axis shows the number of standard deviations of the difference between the upgradient statistical prediction limit and each individual downgradient well result. In this case, larger differences between the upgradient prediction limit and downgradient well results increases the confidence that there will not be any false positives reported. To meet the USEPA recommendations for statistical power, the dashed blue line must fall above the solid line. 3

106 A map of the locations of the JRPS wells is shown in the figure below. 4