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Home My WebLink AboutNC0000396_Interim Action Plan_201604284CIP synTerra INTERIM ACTION PLAN ASHEVILLE STEAM ELECTRIC PLANT 200 CP&L DRIVE ARDENT NC 28704 APRIL 2016 PREPARED FOR DUKE ENERGY PROGRESS,, LLC RALEIGH,, NORTH CAROLINA DUKE NERG PRRE.' nfoy�llebb, NC PG 1328 Project Director t Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra TABLE OF CONTENTS SECTION PAGE 1.0 BACKGROUND............................................................................................................1-1 1.1 Area of Interest..........................................................................................................1-2 1.2 Constituents of Interest............................................................................................1-2 2.0 INTERIM ACTION OBJECTIVES............................................................................ 2-1 3.0 ADDITIONAL ASSESSMENT ACTIVITIES......................................................... 3-1 3.1 Status...........................................................................................................................3-1 3.2 Proposed Additional Assessment........................................................................... 3-1 3.2.1 MW-18BRL........................................................................................................... 3-2 3.2.2 West of the French Broad River........................................................................ 3-2 3.2.2.1 Groundwater Sampling............................................................................... 3-2 3.2.2.2 Water Supply Well Inspection....................................................................3-3 3.2.2.3 Borehole Geophysical Logging...................................................................3-3 3.2.2.4 Surface Water Sampling.............................................................................. 3-4 4.0 INTERIM ACTION TASKS.......................................................................................4-1 4.1 Property Acquisition................................................................................................ 4-1 4.2 Alternate Water Supply........................................................................................... 4-1 4.3 Proposed Remedial Alternatives............................................................................ 4-1 4.3.1 Evaluation............................................................................................................ 4-2 4.3.2 Status.....................................................................................................................4-3 5.0 SCHEDULE.................................................................................................................... 5-1 Page i P: \ Duke Energy Progress.1026\ 102. Asheville Ash Basin GW Assessment Plan\ 16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra LIST OF FIGURES Figure 1-1 Site Location Map Figure 1-2 Site Layout and Area of Interest Figure 3-1 Proposed Additional Site Assessment Figure 4-1 Modeled Boron Distribution With and Without Groundwater Extraction Figure 4-2 Aquifer Test - Site Plan LIST OF TABLES Table 1-1 Groundwater Results for Select Monitoring Wells Table 1-2 Exceedances of 2L Standards for Select Monitoring Wells Page ii P: \ Duke Energy Progress.1026\ 102. Asheville Ash Basin GW Assessment Plan\ 16.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra EXECUTIVE SUMMARY Duke Energy Progress, LLC (Duke Energy), owns and operates the Asheville Steam Electric Plant (Asheville Plant), located near Asheville in Buncombe County, North Carolina. Corrective Action Plan Part 2 was developed and submitted on February 19, 2016 to satisfy requirements of the North Carolina Coal Ash Management Act (NC CAMA). In addition to CAMA, a Settlement Agreement (Agreement) between DEQ and Duke Energy, signed on September 29, 2015, provided an additional requirement to implement accelerated remediation at sites that demonstrated off-site groundwater impacts. Based on data collected for the CSA, potential off-site groundwater impacts were identified west of the 1964 ash basin, beneath a 12 acre parcel within the I-26 right of way. Boron, chloride, cobalt, iron, manganese, selenium, sulfate, total dissolved solids (TDS), and vanadium are likely present at levels greater than the 2L Standard or IMAC in the groundwater beneath this parcel. Duke Energy is currently evaluating the purchase of the subject 12 acre property. As an alternative to property acquisition, groundwater extraction is being evaluated to meet the requirements of the September 29, 2015 Settlement Agreement. Aquifer tests are planned to provide necessary information to evaluate the feasibility and conduct preliminary design of a groundwater extraction system. A series of step - drawdown tests are planned at bedrock monitoring wells CB-08BR, MW-09BR, and CCR-103BR. These tests are scheduled to be complete by May 30, 2016 with data evaluation complete by June 30, 2016. Based on review comments from the CSA, additional assessment has been conducted at the Asheville Plant. Two additional bedrock wells have been installed. One deep boring at background location CB-01BRL indicates the lack of a bedrock flow system in this area, and bedrock well ABMW-11BR, installed beneath the divider dike of the 1964 and 1982 ash basins, has recently been sampled. As a result of water supply well sampling, further assessment of the fractured bedrock flow system and other potential source areas west of the French Broad River are proposed. Proposed assessment activities include water supply well inspection, groundwater sampling, borehole geophysics, and surface water sampling at select private water supply wells and their respective properties. P:\ Duke Energy Progress.1026\ 102. Asheville Ash Basin GW Assessment Plan \ 16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra 1.0 BACKGROUND Duke Energy Progress, LLC (Duke Energy), owns and operates the Asheville Steam Electric Plant (Asheville Plant), located near Asheville in Buncombe County, North Carolina (Figure 1-1). The Asheville Plant occupies approximately 786 acres south of Asheville and began commercial operation in 1964. The Plant consists of two coal-fired units along with two combustion turbines to generate power. The Asheville Plant utilizes adjacent 300 -acre Lake Julian as cooling water, as well as the French Broad River for water supply (Figure 1-2). Coal combustion residuals (CCR) have been managed at the Plant's on-site ash basins and used as structural fill at the nearby Asheville Airport. In order to satisfy requirements of the North Carolina Coal Ash Management Act (CAMA), a Comprehensive Site Assessment (CSA) and Corrective Action Plan (CAP) Parts 1 and 2 were prepared and submitted to the North Carolina Department of Environmental Quality (DEQ). The most recent document, the CAP Part 2, was submitted to DEQ on February 19, 2016. The CAP (Parts 1 and 2) was designed to describe means to restore groundwater quality to the level of the standards, or as close as economically and technologically feasible in accordance with T15A NCAC 02L.0106. Exceedances of numerical values contained in Subchapter 2L and Appendix 1 Subchapter 02L (IMACs) at or beyond the compliance boundary were determined to be the basis for corrective action with the exception of parameters for which naturally occurring background concentrations are greater than the standards. The CAP Part 2 identified the preferred corrective action, developed a detailed conceptual design, and provided implementation and monitoring plans. In addition to CAMA, a Settlement Agreement (Agreement) between DEQ and Duke Energy signed on September 29, 2015, provided an additional requirement to implement accelerated remediation at sites that demonstrated off-site groundwater impacts. Based on data collected for the CSA, potential off-site groundwater impacts were identified west of the 1964 ash basin, beneath a 12 acre parcel within the I-26 right of way. Duke Energy provided an Accelerated Remediation Summary to DEQ on February 17, 2016 which supplemented and updated information included with the CAP Part 2. In correspondence dated March 28, 2016, DEQ acknowledged receipt of the Remediation Summary and requested additional information. This report is prepared in response to the DEQ request for additional information related to the accelerated remediation activities. Page 1-1 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra 1.1 Area of Interest Constituents associated with coal ash pore water migration have been identified within groundwater in the surficial, transition, and bedrock flow zones at the compliance boundary. The area of highest concentration is immediately northwest of the 1964 ash basin extending toward the French Broad River. The concentrations in this area are influenced by the former flue gas desulfurization (FGD) wastewater treatment wetlands as evident by chemical analysis and hydraulic conditions in the area. Groundwater flow in this area is from the basin to the west, towards the French Broad River. Figure 1-2 shows the 1964 ash basin, the area of FGD wastewater treatment wetlands and the offsite parcel (area of interest) within the I-26 right of way. Groundwater monitoring wells delineating concentrations in this area are located on Duke Energy property; however there is a 12 acre parcel of property within the I-26 corridor not owned by Duke Energy (refer to shaded area on Figure 1-2). Groundwater beneath this parcel is likely similar to the groundwater up and downgradient. Seep and surface water data in the same area indicate exceedances of 2L standards or IMACs for boron, chloride, cobalt, iron, manganese, mercury, selenium, sulfate, TDS, and vanadium. 1.2 Constituents of Interest Groundwater sampling performed for the Asheville Steam Electric Plant CSA found exceedances of 2L Standards or IMACs for boron, chloride, cobalt, iron, manganese, selenium, sulfate, total dissolved solids (TDS), and vanadium in monitoring wells located west of the 1964 ash basin and west of Interstate 26. These constituents are assumed to be present above the 2L Standard in the groundwater beneath the area of interest described above. Table 1-1 displays analytical results for wells in the vicinity of the area of interest. Table 1-2 reduces the data to exceedances of the 2L Standard or IMAC at these select wells. Page 1-2 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra 2.0 INTERIM ACTION OBJECTIVES Interim action objectives at the Asheville Plant include: ,61, Acquire the 12 acre parcel (area of interest) within the I-26 right of way 01 Conduct initial aquifer tests to evaluate feasibility and aid in the preliminary design of a groundwater extraction system 10 Conduct additional assessment of private water wells to the west of the French Broad River ,67 Install and assess a deep bedrock location on the eastern shore of the French Broad River ,610 Initiate preliminary groundwater extraction system design `0 Initiate groundwater extraction system permitting Page 2-1 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra 3.0 ADDITIONAL ASSESSMENT ACTIVITIES Additional assessment needs were identified following review of the CSA. The primary data needs requiring additional assessment included the consideration of replacing three background monitoring wells (AMW-3A, CB-01BR, and MW-24BR) and additional hexavalent chromium sampling. 3.1 Status Transition zone background well AMW-03A exhibits elevated pH relative to naturally occurring levels. Aggressive redevelopment of this well was attempted in order to add this location to the background well dataset. Redevelopment of this well was unsuccessful. AMW-03A will not be included in the background well data set and there are no plans to replace this well at this time. CB-01BR was installed as a piezometer to a depth of 84 feet below ground surface. Water yield at this location is insufficient to support development or sampling. Therefore a deeper bedrock well designated CB-01BRL was planned and recently installed. CB-01BRL was drilled to a total depth of 328 feet below ground surface. Water yield at this location is insufficient to support development or sampling. No water bearing fracture zones were observed in the rock core or found during drawdown/falling head tests. This boring was completed as an open borehole. A deeper bedrock well was considered at the MW-24BR location, however there is insufficient access at this location to allow the installation of an additional monitoring well. There are no plans to install a substitute for MW-24BR at this time. CB-09BR provides a background bedrock well location for the northern portion of the site, while AMW-03B provides a background bedrock well for the southern portion of the site. Site wide sampling for hexavalent chromium was conducted in December 2015 and a summary of all hexavalent chromium sampling to date was included in Table 2-3 of the CAP Part 2 document. Hexavalent chromium sampling is planned at background and select downgradient well locations in 2016. 3.2 Proposed Additional Assessment The objective of evaluating groundwater and other potential source areas west of the French Broad River is to evaluate the potential for CCR influence on groundwater beyond a regional groundwater divide. The described scope of work is designed to confirm groundwater analytical results, evaluate the nature and extent of bedrock fractures, and investigate potential alternative source areas near select water supply Page 3-1 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra wells. Information obtained during this effort will be evaluated in conjunction with the recently completed borehole geophysical logging of five water supply wells along Bear Leah Trail. Additional groundwater assessment on the eastern shore of the French Broad River is also proposed to supplement data collected during the CSA. Figure 3-1 shows areas where additional assessment activities are proposed. 3.2.1 MW-18BRL In addition to the water supply well assessment west of the French Broad River, a deep bedrock monitoring well (MW-18BRL) will be installed within the vicinity of the MW -18 cluster. This location was chosen based on the groundwater chemistry data, observed geologic structures, and geographic relationship between the Plant, French Broad River, and select water supply wells west of the French Broad River. Exploratory drilling will be conducted to a depth of 250' below ground surface (bgs) to elevation 1,780' mean sea level. This elevation is based on the assumed depth of the well located at 115 Justin Trail (reported top of pump at 280' bgs with assumed total well depth of 330' bgs). MW-18BRL will be initially installed as an open borehole well. Following the installation of this boring, geophysical logging will be conducted. Once the boring has been logged a monitoring well will be constructed if a fracture zone with sufficient flow is identified at a deeper interval than MW-18BR. 3.2.2 West of the French Broad River Five water supply wells and their respective properties have been identified west of the French Broad River to conduct targeted assessment of the bedrock flow system, groundwater chemistry, and surface water chemistry. Evaluation of this data is intended to clarify water supply well characteristics, the nature and extent of the bedrock flow system, and the presence of potential alternative source areas. 3.2.2.1 Groundwater Sampling Collection of a groundwater sample from the water supply wells to be further assessed will provide confirmation of previously reported results. Laboratory analysis will be run for parameters consistent with the recently completed 3rd and 4th round sample event. Samples will be shipped to the Duke Energy Analytical Laboratory by private courier. Page 3-2 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra 3.2.2.2 Water Supply Well Inspection A North Carolina licensed well driller will remove well pumps to facilitate borehole inspection with a series of geophysical logs. The driller will be required to: '67 Obtain access to water supply well (remove associated plumbing and be prepared to replace as necessary); '67 Remove pump and associated plumbing using appropriate tools; �7 Conduct inspection of water supply system and conduct routine maintenance (including pump, electrical, plumbing, and tank); '67 Troubleshoot observed maintenance items at time of inspection (up to pump replacement); and '67 Following a series of geophysical tests conduct well disinfection, replace pump, and check proper operation prior to leaving site. 3.2.2.3 Borehole Geophysical Logging A series of borehole geophysical logs will be conducted at select water supply wells. Logs will include fluid temperature/resistivity/3-arm caliper/Single Point Resistance, acoustic or optical televiewer, and heat pulse flowmeter under ambient and pumping conditions. This series of logs is expected to take between four and six hours per well to complete, therefore, one water supply well per day will be surveyed. A report documenting findings of the geophysical survey will include logs, interpretations, and results. Using acoustic/optical televiewer data, dip, azimuth, and aperature will be calculated for each detected fracture, and the results will be presented in tadpole and stereographic plots. This information, along with well construction details will be used to further characterize the nature and extent of groundwater flow within the CSA addendum or subsequent reports. Page 3-3 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra 3.2.2.4 Surface Water Sampling Surface water sampling of seeps and drainages within the flood plain area (agricultural use) along the western shore of the French Broad River will be used to investigate potential alternative source areas. The primary area targeted for investigation is located on the same parcel as AS -14 (115 Justin Trail). Site reconnaissance and sampling will be conducted during the same event. Final seep and surface water sampling locations will be determined in the field. Page 3-4 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra 4.0 INTERIM ACTION TASKS The Asheville Steam Electric Plant CAP Part 2 was submitted to DEQ on February 19, 2016. Once approved, the CAMA sates: "No later than 30 days from the approval of the Groundwater Corrective Action Plan, the owner shall begin implementation of the Plan in accordance with the Plan's schedule." The following tasks are planned to be implemented prior to CAP approval and are designed to accelerate remediation of impacted groundwater beneath the 12 acre parcel within the I-26 right of way. 4.1 Property Acquisition Duke Energy is currently pursuing the purchase of the 12 acre parcel (area of interest) located within the I-26 right of way located to the west of the 1964 ash basin. This area of interest is highlighted on Figure 1-2. While negotiations with the current property owner continue, evaluation of aquifer characteristics will be conducted to aid in the preliminary design of a groundwater extraction system. Groundwater extraction may be a viable alternative to a property transaction. 4.2 Alternate Water Supply The majority of the area within a half -mile of the compliance boundary is serviced by municipal water lines. Five water supply wells were identified along Bear Leah Trail during previous receptor surveys. Recently a municipal water line has been provided to these nearby residences by extending a water line along Bear Leah Trail. Following installation of the water line, the water supply wells located along Bear Leah Trail were abandoned in March, 2016. NCDEQ contacted nearby residents regarding wells and managed the sampling of the wells in accordance with CAMA. Based on results of the water supply well sampling, NCDEQ recommended that seven of the residences use an alternate water supply for drinking. Since these letters have been issued, the water line along Bear Leah Trail has been installed and the North Carolina Department of Health and Human Services Standard for hexavalent chromium has been revised. The NCDEQ recommendations for the remaining five locations were based on results for iron, manganese, sulfate, and TDS which were above 2L. Currently, Duke Energy is providing bottled water to these five well owners west of the French Broad River at 213, 215, and 218 Sumner Drive and 105 and 115 Justin Trail near Arden, NC. 4.3 Proposed Remedial Alternatives The area of highest observed concentrations at the Asheville site adjacent to the northwest corner of the 1964 ash basin occur within an area of relatively low aquifer Page 4-1 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra hydraulic conductivity. The fate and transport model shows that elevated concentrations remain in this location and will continue to influence downgradient areas beyond the year 2045. Field observations and measurements as well as model calibration support the presence of the low conductivity zone. Source control is the primary means of achieving compliance with 2L standards downgradient from the 1964 basin and within the area of interest. Projects are underway to remove the FGD wetlands and dewater the settling basin. CSA activities demonstrated each of these areas influences the geochemistry and hydrology downgradient from the 1964 ash basin. Removal of these areas should reduce transport of constituents by lowering the overall hydrologic head and reduce downgradient concentrations by eliminating an active source. Data collected from ongoing groundwater sampling efforts will be evaluate the response of constituent concentrations to changing site conditions. Modeling was performed to view the effect of mass removal within the area of greatest concentrations (Appendix B). Conservative pumping rates of 0.3 gallons per minute (gpm) within 10 extraction wells (3 gpm total) show substantial increases in the rate of boron concentration reduction. Therefore, groundwater extraction could potentially facilitate accelerated reduction of groundwater transport and constituent concentrations in the area of interest. 4.3.1 Evaluation Step -drawdown tests are planned at monitoring wells C13 -0813R, MW -0913R, and CCR-103BR to evaluate aquifer characteristics and the feasibility of a groundwater extraction system near the northwest corner of the 1964 ash basin. Primary goals of the aquifer tests include: 01 Determine sustainable yield 01 Determine potential capture zone of each tested monitoring well y Gain understanding of interconnected flow systems in the vicinity of each tested monitoring well 101 Obtain reliable aquifer characteristic data Aquifer testing is estimated to take up to ten days. During this time, water levels will be monitored both manually and by means of electronic data loggers. Approximately 15 data loggers will be installed in a combination of monitoring Page 4-2 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra wells and piezometers located along and adjacent to CB -0813R, MW -0913R, and CCR-103BR. Figure 4-2 shows the area to be evaluated. Step -drawdown tests are planned at three bedrock monitoring wells. The step tests will be conducted for a period of approximately four to five hours. Well development and sampling logs will be used to determine an appropriately conservative initial pumping rate. The flow rate will be doubled each successive step until the aquifer is adequately stressed to dewater the well. After completion, the recovery well will be allowed to return to static conditions. Once static or near -static conditions have been achieved, the next test can proceed. The water table will be considered to have reached static conditions when the difference between water levels measured over a 12- hour period is less than 5%. 4.3.2 Status The FGD treatment wetlands have been completely removed from the 1964 ash basin. A pump station is under construction to bypass the settling basin within the 1964 ash basin. Water will be routed directly to Outfall 001, resulting in the dewatering of this basin. Aquifer tests are scheduled to be complete by May 30, 2016. The following milestones/schedule is proposed: E1 Complete evaluation of initial aquifer test data - June 30, 2016 101 Assess need for active remediation based on potential property acquisition - ongoing y Complete feasibility study and preliminary design for active remediation (groundwater extraction) - target date September 30, 2016 y Complete permitting process (E&SC, wetlands) - target date December 31, 2016 161, Installation/Startup Groundwater Extraction System - 2nd Quarter, 2017 Page 4-3 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant SynTerra 5.0 SCHEDULE A comprehensive schedule of interim action and additional assessment items follows: ,611 Pursue purchase of 12 acre parcel within I-26 right of way - Ongoing 167 Complete aquifer test at select bedrock monitoring wells west of the 1964 ash basin - May 31, 2016 10 Complete additional assessment scope items west of the French Broad River - June 30, 2016 ,61, Complete MW-18BRL assessment - June 30, 2016 411 Complete evaluation of aquifer test data - June 30, 2016 41, Initiate feasibility study and preliminary groundwater extraction system design - June 30, 2016 01 Initiate permitting for groundwater extraction system - June 30, 2016 10 Submit CSA Supplemental report summarizing additional assessment findings - August 31, 2016 161, Complete feasibility study and preliminary groundwater extraction system design - September 30, 2016 'fir Obtain permitting approval, including modification to the NPDES permit, for groundwater extraction treatment system - March 2017. 4r Initiate construction of the groundwater extraction treatment system - Timeframe is difficult to determine until initial aquifer testing is completed and permitting agencies have provided input. If acquision of the I-26 parcel is successful, Duke Energy will own the property to the French Broad River and accelerated remediation may not be necessary at that time. Page 5-1 P:\Duke Energy Progress.1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx Interim Action Plan April 2016 Asheville Steam Electric Plant Figures SynTerra P:\ Duke Energy Progress.1026\ 102. Asheville Ash Basin GW Assessment Plan \ 16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx / ti � ♦ IIS I \'' ,` �I p I I �° � ► h`- - �� • Hyland .�� , • J /`� � � i tiff � ja —� � - � I / r= — '•• °' �i� id � / h Id ,9p I r � ,�.. •�. aill 500' COMPLIANCE BOUNDARY \ 6'•• LAKE JULIAN�� 1 3 Ao Substafib •• a •,`/, �� i� Q �� tlgn ❑ hevi a Lan _—��,•� .• �� vs � yy ;) o _ � ' �,d ��' \ i � -Col �� L� � ` • • DUKE ENERGY PROGRESS •'�� i r ritton Mtn a o WASTE BOUNDARY PROPERTY BOUNDARY jlri 5 � � ,� '� � l� ��, I� t � � . 3527 F� _ �� _' •psi �� Creek�UF2 i 204 % 00 - � -' �r l �� ' i ' D � ��-1-�� !mss = 1�' i/ , � • � , �i 47� 349 i � •r .� , `� � .v � � � r ,I V �-,• 1. (( (1�� _ r �• ��• SOURCE: r r✓ USGS TOPOGRAPHIC MAP OBTAINED FROM THE USGS STORE AT , `� Ili 2/0 9 http://store.usgs.gov/b2c_usgs/b2c/start/%%%28xcm=r3standardpitrex_prd%%%29/.do FIGURE 1-1 SITE LOCATION MAP DUKE ENERGY PROGRESS WINS70NSALEM• ASHEVILLE STEAM ELECTRIC PLANT A9"EI.LLE 200 CP&L DRIVE '�_Terra BUNCOMBE COUNTY •°HARLO 7E ARDEN, NORTH CAROLINA SKYLAND NC QUADRANGLE 0 148 RIVER STREET, SUITE 220 GREENVILLE, SOUTH CAROLINA DRAWN BY: J. CHASTAIN DATE:1/6/2016 GRAPHIC SCALE PHONE 864-421-9999 PROJECT MANAGER: KATHY WEBB CONTOUR INTERVAL: 20 Fr 1000 0 1000 2000 www.synterracorp.com LAYOUT: FIGURE 1-1 (USGS TOPO MAP) MAP DATE: 1991 IN FEET � . 4 .rte ' �• r 1 ` • ,1 /,. 10 LEGEND •'�,-�•._-��F T ��""�" / MONITORING WELLS w 't / . PIEZOMETERS 12 ACRE PARCEL AREA OF INTEREST WASTE BOUNDARY ' ✓ " " ASH BASIN COMPLIANCE BOUNDARY a, LAKE -�� DUKE ENERGY PROGRESS ASHEVILLE PLANT SITE BOUNDARY JULIAN - — - DITCH STREAM 12 ACRE PARCEL -AREA OF INTEREST MW -15D cst3°uy .. 75BR, M13BW-BR C -U MW -15A MW CB-08BR ° °,�� MW -13D CB -08D SETTLING MW-16ACB-08 / MW-09BR POND MW -09D MW -09S - MW -1613 n MW-08BR / 1 MW -08S 1964 ASH MW -17A \ GW -02 BASIN •� Still MW -18D Pipe MW-07BR rZ� MW -18B R CB -07 GW -03 ' Ip,ar a z�i MW-19BR -. 1 GW -04 '. MW -20A MW -06 9BR ' _ ABMW-11BR 1982 ASH BASIN t ♦ sib. r � M11 JO `. At �`T � GW -01 G W-01 B R J,JLI„ n GW -01D MW -01D' 1 MW-01BR CB -01D I CB -011111111 ♦p �CB-0�11BIRL' CB -01 BR s + CB -02 . t• v4WA `rS NO i FRONT DRINKING WATER WELLAND RECEPTOR STUDY (APPENDIX B). y 2 APRIL 17, 2014 AERIAL ORTHOPHOTOGRAPHY OBTAINED FROM WSP. F 3 2013 AERIAL ORTHOPHOTOGRAPHY OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS.(http://services.nconemap.gov/) ° 4 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC a . INFORMATION AND ANALYSIS. (http://services.nconemap.gov/) Z Q 5 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE SYSTEM FIPS 3200 (NAD83/2011). 6 ABMW-11 BR AND CB -01 BRL WELL LOCATIONS ARE APPROIMATE. I IF GRAPHIC SCALE 500 0 500 1,000 IN FEET v y LDUKE U 0 a g V ENERGY w synTerra PROGRESS • • 148 RIVER STREET, SUITE 220, ASHEVILLE STEAM ELECTRIC PLANT a ( GREENVILLE, SC 29601 200 CP & L DRIVE w 864421-9999 ARDEN, NORTH CAROLINA www.synterracorp.com w DRAWN BY: A. ROBINSON DATE: 04/21/2016 NECKED BY: C. PONCE DATE: 04/21/2016 n PROJECT MANAGER: T. PLATING 17 FIGURE 1-2 a SITE LAYOUT AND AREA OF INTEREST ASHEVILLE STEAM ELECTRIC PLANT w A SR -3655 6' , 4r, ILDW-29 _. SR* 36g6 J R SR -3666 ` u, I DW 35 �v( PRW-1 �O ' DW 10 �y m SR -3564 DW -16 9 AS9/DW 32 kc - 'x �DW-23 DW -2 - NC -146 t ` DW -1 *• /• � • � -15D "`F'MW=14BR"" '"=-"09-4'`" CB-09SL CB - ea, MWR CB-09BR - -15A MW-15BR• CB-08BR / MW-13Do t" ;. ` CB_08D SETTLING MW -16 L CB-08/MW-09BR ro", 1 AT MW -09D /�'MW-09S W-08BR / ,MW -08S GW -01 o i 1964 ASH G W-01 B R •c6 '- GW -02 BASIN I d s MW -17A \ / 4 GW -01D still /A� MW -18D Pipe / MW-07BR MW -01D � 1 MW-01BR _ MW-18BR ABMW-11 BR CB -01D ' CB -01 1-1 CB=07 GW -03, 1982 ASH MW-18BRL BASIN qy • / CB -06 CB-01BR CB 01BRL, 'o \ MW-19BR/ CB -02 AS81DW 31 - ��a GW -04 MW-03BR MW 20A I MW -03D gh�R DW 3 AS7/DW. 21 MW -06S 1 DW- y i V W-34 A8101DW-30 CB=046 MW-23BR CB -05 ' . AS11/DW-14MW-21D AMW-01B MW-23DU 0 ` DW -36 AS111DW-15 S15)DW-37 —Q . DW -19 MW -22D MW-22BR _ N DW 18 _ 5g1 I PRW-6 Ch1 �ss6 DW.8 \ °' �� 1 14/DW-27 91rf A16 -AV N LEGEND ADDITIONAL DEEP BEDROCK MONITORING WELL MONITORING WELLS _ PIEZOMETERS ` O WATER SUPPLY WELL ' O PROPOSED ADDITIONAL ASSESSMENT AT WATER SUPPLY WELL d. L APPROXIMATE SURFACE WATER SAMPLING LOCATIONS, TO BE DETERMINED IN FIELD _ - F WASTE BOUNDARY ASH BASIN COMPLIANCE BOUNDARY DUKE ENERGY PROGRESS ASHEVILLE PLANT SITE BOUNDARY • — - — - DITCH STREAM o� NOFROM DRINKING WATER WELLAND RECEPTOR STUDY (APPENDIX B). ' M ti y� 2 APRIL 17, 2014 AERIAL ORTHOPHOTOGRAPHY OBTAINED FROM WSP. -71 3 2013 AERIAL ORTHOPHOTOGRAPHY OBTAINED FROM THE NC CENTER FOR ' GEOGRAPHIC INFORMATION AND ANALYSIS.(http://services.nconemap.gov/) 4 PARCEL BOUNDARY WAS OBTAINED FROM THE NC CENTER FOR GEOGRAPHIC INFORMATION AND ANALYSIS. (http://services.nconemap.gov/) 5 DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE D 2 COORDINATE SYSTEM FPS 3200 (NAD83/2011). i SR3523 6 ABMW-11BRAND CB-01BRLWELL LOCATIONS ARE APPRO[MATE. ' GRAPHIC SCALE DW -26 500 0 500 1,000 W-22 IN FEET DUKE Terra ENERGY PROGRESS 148 RIVER STREET, SUITE 220, ASHEVILLE STEAM ELECTRIC PLANT • GREENVILLE, SC 29601 200 CP & L DRIVE 864421-9999 ARDEN, NORTH CAROLINA www.synterracorp.com - ' ^•r PROJECT MANAGER: T. PLATING l FIGURE 3-1 PROPOSED ADDITIONAL ASSESSMENT ASHEVILLE STEAM ELECTRIC PLANT EXCAVATION ONLY (NO GROUNDWATER EXTRACTION) EXCAVATION WITH GROUNDWATER EXTRACTION 2030 - .;, r o 2045 f 2020 �QQQ k 0 0 NOTES: 2L STANDARD FOR BORON IS 700 (IJg/L). LEGEND ---- DUKE ENERGY PROGRESS EXTRACTION WELL (APPROXIMATE) BORON CONCENTRATIONS (Ng/L) 4000 2000 700 MAP SOURCES: 1. AERIAL PHOTOGRAPH OBTAINED FROM THE DUI I NRC NRCS GEOSPATIAL DATA GATEWAY AT http://datagateway. nres. usda. gov/ E N E 2. DRAWING HAS BEEN SET WITH A PROJECTION OF NORTH CAROLINA STATE PLANE COORDINATE PROC SYSTEM RIPS 3200 (NAD 83, NAVD88). 3. PARCEL BOUNDARY WAS OBTAINED FROM ASHEVILLE STEAM ELE BUNCOMBE COUNTY GIS DATA AT 200 CP & L DRIVE http://gis.buncombecounty.org/buncomap/Map_All.html ARDEN, NORTH CAROL 2020 �QQQ k 0 0 NOTES: 2L STANDARD FOR BORON IS 700 (IJg/L). Interim Action Plan April 2016 Asheville Steam Electric Plant Tables SynTerra P:\ Duke Energy Progress.1026\ 102. Asheville Ash Basin GW Assessment Plan \ 16.Corrective Action Plan \ Accelerated Remediation Conceptual Approach \ Interim Action Plan \ Asheville Interim Action Plan.docx TABLE 1-1 GROUNDWATER RESULTS FOR SELECT MONITORING WELLS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 1 of 8 Analytical Parameter PN Water Level Temp Spec Cond DO OR Eh Turbidity Ferrous Iron Alkalinity Aluminum Aluminum Aluminum Antimony Antimony Antimony Arsenic Arsenic Arsenic Barium Barium Barium Beryllium Beryllium Beryllium Bi- carbonate Alkalinity Boron Boron Boron DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (O.lu) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT Reporting Units S.U. ft Deg C umhos/cm mg/I my my NTUs mg/I mg/l ug/l ug/l ug/l ug/l ug/l ug/1 ug/l ug/I ug/l ug/l ug/1 ug/l ug/I ug/I ug/I mg/I ug/1 ug/I ug/1 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE NE NE 1* NE NE 10 NE NE 700 NE NE 4* NE NE NE 700 Sample ID Sample Collection Date Field Parameters Analytical Results Alluvial CB -07 11/18/2010 NM 8.06 15 419 NM NM NM 0 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 88.9 NA NA NA NA NA NA 259 CB -07 04/12/2011 5.6 6.37 12 433 4.63 -77 128 1.73 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 52.5 NA NA NA NA NA NA 127 CB -07 07/14/2011 5.4 7.80 19 510 4.51 -14 191 0.38 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 72.2 b NA NA NA NA NA NA 227 CB -07 DUP 07/14/2011 5.4 7.80 19 510 4.51 -14 191 0.38 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 65 b NA NA NA NA NA NA 236 CB -07 11/08/2011 5.5 7.95 16 643 4.8 -52 153 1.19 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 91.2 NA NA NA NA NA NA 282 CB -07 04/10/2012 5.6 6.90 14 436 5.33 -41 164 1.23 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 42.9 NA NA NA NA NA NA 200 CB -07 07/17/2012 5.4 1 7.74 1 20 538 0.99 203 408 0.71 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 61.6 NA NA NA NA NA NA 270 CB -07 11/16/2012 5.8 8.37 12 407 4.88 276 481 0.84 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 47.8 NA NA NA NA NA NA 247 CB -07 04/04/2013 5.5 6.96 8 277 3.51 71 276 2.17 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 20 NA NA NA NA NA NA 110 CB -07 07/02/2013 5.5 6.35 17 369 0.82 -3 202 4.17 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 26 NA NA NA NA NA NA 208 CB -07 11/06/2013 5.7 8.03 17 384 3.2 62 267 7 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 35 NA NA NA NA NA NA 240 CB -07 04/17/2014 5.8 6.64 10 418 4.4 355 560 2 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 32 NA NA NA NA NA NA 208 CB -07 07/10/2014 5.8 7.32 21 262 3.21 270 475 1.6 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 23 NA NA NA NA NA NA 161 CB -07 11/04/2014 5.8 8.02 15 227 3.78 252 457 0.65 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 17 NA NA NA NA NA NA 146 CB -07 04/06/2015 5.9 7.73 11 456 6.2 65 270 0.78 NM 14.6 NA NA 8 NA NA <1 NA NA <1 NA NA 36 NA NA <1 14.6 NA NA 233 CB -07 07/08/2015 5.8 8.65 21 276 4.45 66 271 1.13 NM 22.9 5 NA 8 <1 NA <1 <1 NA <1 29 NA 29 <1 NA <1 22.9 259 NA 263 CB -07 09/04/2015 5.6 9.22 20 412 1.1 235 440 1.42 NM NA 8 8 NA <1 <1 NA <1 <1 NA 46 47 NA <1 <1 NA NA 296 300 NA CB -07 11/02/2015 5.2 5.53 17 247 4.7 S00 705 1.5 NM 21.8 NA NA 18 NA NA <1 NA NA <1 NA NA 22 NA NA <1 21.8 NA NA 66 CB -07 12/08/2015 5.8 5.82 12 306 2 274 479 1.5 0 26.8 <100 NA <100 <0.5 NA <0.5 <0.5 NA <0.5 29 NA 31 <0.2 NA <0.2 26.8 85 NA 88 CB -07 01/19/2016 5.9 5.79 6 322 1.7 156 361 1.5 0 29.1 7 NA 30 <1 NA <1 <1 NA <1 39 NA 41 <1 NA <1 29.1 122 NA 121 MW -15A 03/04/2015 5.4 6.23 10 188 2.86 47 252 3.28 0.5 <10 81 NA 165 <1 NA <1 <1 NA <1 113 NA 117 <1 NA <1 <10 62 NA 61 MW -15A 05/20/2015 4.9 7.94 18 167 0.41 151 356 4.73 <0.5 <10 128 NA 179 <1 NA <1 <1 NA <1 80 NA 84 <1 NA <1 <10 51 NA 54 MW -15A 12/08/2015 5.2 6.11 14 165 1.24 257 462 1.08 0 <5 100 NA 110 <0.5 NA <0.5 <0.5 NA <0.5 L3 88 NA 89 0.26 NA 0.23 <5 71 NA 71 MW -15A 01/18/2016 5.1 5.88 5 172 0.7 225 430 0.6 NM <5 112 NA 132 <1 NA <1 <1 NA <1 90 NA 92 <1 NA <1 <5 58 NA 60 MW -16A 03/11/2015 5.3 9.63 10 400 0.88 35 240 0.63 0.5 <10 186 NA 200 <1 NA <1 <1 NA <1 117 NA 123 <1 NA <1 <10 301 NA 303 MW -16A DUP 03/11/2015 5.3 9.63 10 400 0.88 35 240 0.63 0.5 <10 180 NA 203 <1 NA <1 <1 NA <1 116 NA 124 <1 NA <1 <10 295 NA 302 MW -16A 05/28/2015 5.0 9.84 15 432 0.51 12 217 3.17 <0.5 <10 213 NA 226 <1 NA <1 <1 NA <1 117 NA 118 <1 NA <1 <10 358 NA 354 MW -16A 09/08/2015 4.9 11.15 19 502 0.83 190 395 6.93 NM NA 365 348 NA <1 <1 NA <1 <1 NA 174 177 NA <1 <1 NA NA 580 591 NA MW -16A 12/08/2015 5.1 8.46 15 432 0.61 153 358 2.65 0.5 <5 180 NA 200 <0.5 NA <0.5 <0.5 NA <0.5 150 NA 150 0.24 NA 0.29 <5 510 NA 480 MW -16A 01/18/2016 5.0 8.41 5 598 0.6 268 473 0.5 0 <5 422 NA 260 <1 NA <1 <1 NA <1 208 NA 162 <1 NA <1 <5 617 NA 524 MW -17A 03/03/2015 6.3 5.28 8 1331 1.24 22 227 9.4 3 36 58 NA 321 <1 NA <1 1.08 NA <1 139 NA 154 <.1 NA <1 36 1240 NA 1060 MW -17A 05/21/2015 6.2 6.89 24 1573 0.49 -163 42 6.72 6 48 83 NA1970 11 NA <1 4.04 NA 3.35 126 NA 125 <1 NA <1 48 1650 NA 1540 MW -17A 12/09/2015 5.7 5.77 3 1531 2.8 255 460 6.82 NM 19.1 <100 NA <100 <0.5 NA <0.5 1.8 NA 2.4 120 NA 120 <0.2 NA <0.2 19.1 2000 NA 2000 MW -17A 01/19/2016 5.7 5.52 1 1612 0.6 98 303 8.7 2 <5 117 NA 91 <1 NA <1 <1 NA <1 128 NA 134 <1 NA <1 <5 1820 NA 1940 Saprolite MW -08S 03/06/2015 6.0 7.69 11 2013 0.79 41 246 4.25 <0.5 70 <5 NA 124 <1 NA <1 <1 NA <1 249 NA 251 <1 NA <1 70 4930 NA 5030 MW -08S 05/27/2015 5.9 6.93 23 1949 0.95 108 313 8.15 <0.5 78 <5 NA 7 <1 NA <1 <1 NA <1 222 NA 223 <1 NA <1 78 5210 NA 5330 MW -08S 09/01/2015 6.2 7.34 25 1897 1.18 169 374 1.02 NM NA <5 <5 NA <1 L1 <1 NA <1 <1 NA 217 215 NA <1 <1 NA NA 4780 4910 NA MW -08S 12/09/2015 6.0 6.27 17 1810 0.8 272 477 2.31 0 85 <100 NA <100 <0.5 NA <0.5 0.78 NA 0.74 170 NA 180 <0.2 NA <0.2 85 5600 NA 5600 MW -08S 01/20/2016 6.1 5.86 11 1851 0.4 197 402 0.5 0 81 <5 NA 9 <1 NA <1 <1 NA <1 180 NA 184 <1 NA <1 81 6050 NA 6140 MW -09S 04/27/2015 5.5 28.52 19 2252 2.04 132 337 4.16 <0.5 46 64 NA 35 <1 NA <1 <1 NA <1 225 NA 215 <1 NA <1 46 4870 NA 4730 MW -09S 05/21/2015 5.5 28.56 20 2291 1.19 37 242 5.59 <0.5 42 29 NA 245 <1 NA <1 <1 NA <1 187 NA 183 <1 NA <1 42 4840 NA 4800 MW -09S 09/02/2015 5.5 28.93 19 2036 3 179 384 19.5 NM NA 116 19 NA <1 <1 NA <1 <1 NA 158 165 NA <1 <1 NA NA 5030 5250 NA MW -09S 12/09/2015 5.2 28.20 12 2182 1.3 429 634 3.32 0 39.5 <100 NA <100 <0.5 NA <0.5 <0.5 NA <0.5 150 NA 160 <0.2 NA <0.2 39.5 5400 NA 5400 MW -09S 01/20/2016 5.7 27.69 7 2135 1.4 362 567 1 NM 39.4 15 NA 40 <1 NA <1 <1 NA <1 148 NA 147 <1 NA <1 39.4 5570 NA 5560 Transition Zone. CB -08 11/18/2010 NM 50.33 14 907 NM NM NM 0.92 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 217 NA NA NA NA NA NA 972 CB -08 04/12/2011 5.0 48.60 16 1135 2.89 -79 126 9.23 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 216 NA NA NA NA NA NA 1110 CB -08 07/15/2011 5.1 48.84 18 1102 3.01 -21 184 6.95 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 224 b NA NA NA NA NA NA 1060 CB -08 11/08/2011 5.1 51.53 17 1180 2.87 -83 122 2.67 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 229 NA NA NA NA NA NA 1360 CB -08 04/11/2012 5.1 49.75 15 824 3.04 -64 141 5.29 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 186 NA NA NA NA NA NA 1080 CB -08 07/17/2012 5.0 40.04 15 682 3.25 552 757 0.38 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 163 NA NA NA NA NA NA 841 CB -08 11/15/2012 5.0 45.68 15 885 2.37 362 567 7.24 NM NA NA NA NA NA NA <0.5 NA NA <5 NA NA 166 NA NA NA NA NA NA 1140 CB -08 04/04/2013 5.0 45.40 15 876 2.54 99 304 4.35WNM NA NA NA NA NA NA <1 NA NA <1 NA NA 168 NA NA NA NA NA NA 1090 CB -08 DUP 04/04/2013 5.0 45.40 15 876 2.54 99 304 4.35 NA NA NA NA NA NA <1 NA NA <1 NA NA 174 NA NA NA NA NA NA 1110 CB -08 07/02/2013 5.5 44.44 15 719 2.9 20 225 1.77 NA NA NA NA NA NA <1 NA NA <1 NA NA 160 NA NA NA NA NA NA 1060 CB -08 11/06/2013 5.1 45.46 15 747 2.4 456 661 5.6 NA NA NA NA NA NA <1 NA NA <1 NA NA 183 NA NA NA NA NA NA 1230 P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 1 of 8 TABLE 1-1 GROUNDWATER RESULTS FOR SELECT MONITORING WELLS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 2 of 8 Analytical Parameter Cadmium Cadmium Cadmium Calcium Carbonate Alkalinity Chloride Chromium (Hexavalent) Cr(VI) Speciation Chromium Chromium Chromium Cobalt Cobalt Cobalt Copper Copper Copper Iron Iron Iron Lead Lead Lead Magnesium Manganese Manganese Manganese DIS DIS (0.1u) TOT TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT TOT DIS DIS (0.1u) TOT Reporting Units ug/I ug/l ug/I mg/I mg/I mg/I ug/I ug/I ug/l ug/I ug/I ug/I ug/l ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/l mg/I ug/I ug/1 ug/I 15A NCAC 02L Standard NE NE 2 NE NE 250 NE NE NE NE 10 NE NE 1* NE NE 1000 NE NE 300 NE NE 15 NE NE NE 50 Sample ID Sample Collection Date Analytical Results Alluvial CB -07 11/18/2010 NA NA 0.22 NA NA 121 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 342 NA NA <5 NA NA NA 236 CB -07 04/12/2011 NA NA <0.08 NA NA 128 NA NA NA NA <5 NA NA NA NA NA <5 NA NA <50 NA NA <5 NA NA NA <5 CB -07 07/14/2011 NA NA <0.08 NA NA 117 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 52.4 NA NA <5 NA NA NA 12.9 CB -07 DUP 07/14/2011 NA NA <0.08 NA NA 121 NA NA NA NA <5 NA NA NA NA NA <5 NA NA <50 NA NA <5 NA NA NA 11.7 CB -07 11/08/2011 NA NA 0.14 NA NA 159 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 65.3 NA NA <5 NA NA NA 95.5 CB -07 04/10/2012 NA NA <0.08 NA NA 105 NA NA NA NA <5 NA NA NA NA NA <5 NA NA <50 NA NA <5 NA NA NA <5 CB -07 07/17/2012 NA NA <0.08 NA NA 152 NA NA NA NA <5 NA NA NA NA NA <5 NA NA <50 NA NA <5 NA NA NA 130 CB -07 11/16/2012 NA NA 0.11 NA NA 69.9 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 60.9 NA NA <5 NA NA NA 29 CB -07 04/04/2013 NA NA <1 NA NA 39 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 135 NA NA <1 NA NA NA <5 CB -07 07/02/2013 NA NA <1 NA NA 51 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 193 NA NA <1 NA NA NA 18 CB -07 11/06/2013 NA NA <1 NA NA 68 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 816 NA NA <1 NA NA NA 47 CB -07 04/17/2014 NA NA <1 NA NA 93 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 30 NA NA <1 NA NA NA <5 CB -07 07/10/2014 NA NA <1 NA NA 44 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 115 NA NA <1 NA NA NA 7 CB -07 11/04/2014 NA NA <1 NA NA 19 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 19 NA NA <1 NA NA NA <5 CB -07 04/06/2015 NA NA <1 37.2 <5 95 NA NA NA NA <5 NA NA <1 NA NA <5 NA NA <10 NA NA <1 11.6 NA NA <5 CB -07 07/08/2015 <1 NA <1 23.3 <5 36 NA NA <1 NA <5 <1 NA <1 1.13 NA <5 <10 NA <10 <1 NA <1 7.38 5 NA <5 CB -07 09/04/2015 <1 <1 NA NA NA NA NA NA <1 <1 NA <1 <1 NA 7.58 <1 NA <10 10 NA <1 <1 NA NA 72 75 NA CB -07 11/02/2015 NA NA <1 26.1 <5 41 NA NA NA NA <5 NA NA <1 NA NA <5 NA NA 20 NA NA <1 5.63 NA NA 5 CB -07 12/08/2015 <0.08 NA <0.08 35.5 <5 67.1 <0.03 NA <0.5 NA <0.5 0.59 NA 0.58 <1 NA <1 <50 NA <50 <0.1 NA <0.1 6.91 13 NA 14 CB -07 01/19/2016 <1 NA <1 27.6 <5 65 <0.03 NA 1.29 NA <1 <1 NA <1 <1 NA <1 10 NA 44 <1 NA <1 5.2 15 NA 14 MW -15A 03/04/2015 <1 NA <1 9.55 <10 43 NA NA <1 NA <1 1.15 NA 1.25 <1 NA <1 627 NA 879 <1 NA <1 4.61 1080 NA 1060 MW -15A 05/20/2015 <1 NA <1 7.7 <10 34 NA NA <1 NA <1 d NA <1 <1 NA <1 122 NA 217 <1 NA <1 4.22 814 NA 840 MW -15A 12/08/2015 <0.08 NA <0.08 7.49 <5 39.4 <0.03 NA <0.5 NA <0.5 0.61 NA 0.61 <1 NA <1 <50 NA <50 <0.1 NA <0.1 4.36 960 NA 1000 MW -15A 01/18/2016 <1 NA <1 6.99 <5 43 <0.03 NA <1 NA <1 <1 NA <1 <1 NA <1 37 NA 43 <1 NA <1 4.19 957 NA 1000 MW -16A 03/11/2015 <1 NA <1 33.6 <10 93 NA NA <1 NA <1 1.1 NA 1.01 <1 NA <1 500 NA 522 <1 NA <1 11.7 1880 NA 1980 MW -16A DUP 03/11/2015 <1 NA <1 33.4 <10 92 NA NA <1 NA <1 1.09 NA 1.1 <1 NA <1 484 NA 538 <1 NA <1 11.6 1860 NA 2000 MW -16A 05/28/2015 <1 NA <1 35.4 <10 97 NA NA <1 NA <1 1.32 NA 1.35 1.97 NA <1 185 NA 248 <1 NA <1 12.6 1960 NA 1940 MW -16A 1 09/08/2015 <1 <1 NA NA NA NA NA NA <1 <1 NA 2.27 2.29 NA <1 <1 NA 64 14 NA <1 <1 NA NA 2310 2340 NA MW -16A 12/08/2015 <0.08 NA <0.08 41.4 <5 132 <0.03 1 NA <0.5 NA <0.5 1 NA 1.4 <1 NA <1 140 NA 420 0.14 NA 0.15 14.7 1400 NA 1600 MW -16A 01/18/2016 <1 NA <1 44.7 <5 140 0.034 NA <1 NA <1 2.28 NA 1.33 <1 NA <1 62 NA 96 <1 NA <1 15.8 2240 NA 1620 MW -17A 03/03/2015 <1 NA <1 132 <10 330 NA NA <1 NA <1 28.2 NA 26.3 <1 NA <1 23000 NA 8970 <1 NA <1 39.8 17300 NA 12800 MW -17A 05/21/2015 <1 NA <1 166 <10 390 NA NA 2.21 NA 3.92 29.8 NA 25.8 <1 NA 1.06 40400 NA 40600 <1 NA <1 51 14900 NA 11900 MW -17A 12/09/2015 <0.08 NA <0.08 172 <5 403 <0.03 NA <0.5 NA<0.5 22.6 NA 22.6 <1 NA <1 28600 NA 29500 <0.1 NA <0.1 52.1 7000 NA 6700 MW -17A 01/19/2016 <1 NA <1 172 <5 410 <0.03 NA 30.4 NA 4.18 22.4 NA 22.4 <1 NA <1 23800 NA 24200 <1 NA <1 54.4 6330 NA 6420 Saprolite MW -085 03/06/2015 <1 NA <1 274 <10 450 NA NA <1 NA <1 8.16 NA 7.73 <1 NA <1 42 NA 162 <1 NA <1 79.9 2840 NA 2850 MW -085 05/27/2015 <1 NA <1 245 <10 450 NA 0.045 <1 NA <1 3 NA 3.09 <1 NA <1 30 NA 17 <1 NA <1 78.5 2970 NA 2830 MW -085 09/01/2015 <1 <1 NA NA NA NA NA 0.026 B <1 <1 NA 6.07 6.01 NA 10.7 2.19 NA <10 <10 NA <1 <1 NA NA 2670 2720 NA MW -08S 12/09/2015 <0.08 NA <0.08 142 Ml <5 398 0.035 NA <0.5 NA <0.5 2.9 NA 2.8 <1 NA <1 <50 NA <50 <0.1 NA <0.1 71 Ml 2600 NA 2600 MW -085 01/20/2016 <1 NA <1 231 <5 420 <0.03 NA <1 NA <1 2.96 NA 2.75 <1 NA <1 <10 NA 15 <1 NA <1 79.5 2820 NA 2920 MW -095 04/27/2015 <1 NA <1 293 <10 560 NA NA <1 NA <1 17.4 NA 15.8 <1 NA <1 105 NA 70 <1 NA <1 91.3 4580 NA 4290 MW -09S /21/2015 <1 NA <1 296 <10 570 NA NA <1 NA <1 5.85 NA 5.9 <1 NA <1 18LNA NA 211 <1 NA <1 87.7 3870 NA 3630 MW -095 /02/2015 <1 <1 NA NA NA NA NA NA <1 <1 NA 4.12 4.21 NA <1 <1 NA 56<10 NA <1 <1 NA NA 3650 3840 NA MW -095 ]112/09/2015 0.24 NA 0.18 276 <5 <1 0.37 NA <0.5 NA 0.64 4.5 NA 4 <1 NA <1 <50NA <50 <0.1 NA <0.1 82.2 3400 NA 3400 MW -095 /20/2016 <1 NA <1 250 <5 530 0.5 NA 13.1 NA 16.1 3.95 NA 3.64 <1 NA <1 68 78 <1 NA <1 84 3450 NA 3410 Transition Zone CB -08 11/18/2010 NA NA 0.46 NA NA 299 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 64.6 NA NA <5 NA NA NA 579 CB -08 04/12/2011 NA NA 0.5 NA NA 319 NA NA NA NA 11 NA NA NA NA NA 23.6 NA NA 815 NA NA <5 NA NA NA 683 CB -08 07/15/2011 NA NA 0.6 NA NA 271 NA NA NA NA 30.8 NA NA NA NA NA <5 NA NA 370 NA NA <5 NA NA NA 696 CB -08 11/08/2011 NA NA 0.49 NA NA 295 NA NA NA NA 5.2 NA NA NA NA NA <5 NA NA 145 NA NA <5 NA NA NA 786 CB -08 04/11/2012 NA NA 0.39 NA NA 212 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 93.9 NA NA <5 NA NA NA 709 CB -08 07/17/2012 NA NA 0.34 NA NA 162 NA NA NA NA <5 NA NA NA NA NA <5 NA NA <50 NA NA <5 NA NA NA 552 CB -08 11/15/2012 NA NA 0.43 NA NA 220 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 80.6 NA NA <5 NA NA NA 652 CB -08 04/04/2013 NA NA <1 NA NA 170 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 63 NA NA I NA NA NA 679 CB -08 DUP 04/04/2013 NA NA <1 NA NA 170 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 97 NA NA <1 NA NA NA 695 CB -08 07/02/2013 NA NA <1 NA NA 140 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 73 NA NA <1 NA NA NA 647 CB -08 11/06/2013 NA NA <1 NA NA 160 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 225 NA NA <1 NA NA NA 764 P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 2 of 8 TABLE 1-1 GROUNDWATER RESULTS FOR SELECT MONITORING WELLS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 3 of 8 Analytical Parameter Mercury Mercury Mercury Methane Molybdenum Molybdenum Molybdenum Nickel Nickel Nickel Nitrate (as N) Nitrate Potassium Selenium Selenium Selenium Sodium Strontium Strontium Strontium Sulfate Sulfide Thallium Thallium Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids DIS DIS (0.1u) TOT DIS DIS (O.lu) TOT DIS DIS (0.1u) TOT TOT DIS DIS (0.1u) TOT TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT Reporting units ug/I ug/I ug/I ug/I ug/l ug/l ug/I ug/1 ug/I ug/I mg-N/L mg/1 mg/I ug/I ug/I ug/I mg/I ug/l ug/1 ug/I mg/I mg/I ug/I ug/I ug/I mg/I mg/I mg/I 15A NCAC 02L Standard NE NE 1 NE NE NE NE NE NE 100 SO SO NE NE NE 20 NE NE NE NE 250 NE NE NE 0.2* 500 NE NE Sample ID Sample Collection Date Analytical Results Alluvial CB -07 11/18/2010 NA NA <0.2 NA NA NA NA NA NA <5 NA <0.1 NA NA NA <10 NA NA NA NA 53.5 NA NA NA <0.1 319 NA NA CB -07 04/12/2011 NA NA <0.2 NA NA NA NA NA NA <5 NA <0.1 NA NA NA 15.6 NA NA NA NA 20.3 NA NA NA <0.1 266 NA NA CB -07 07/14/2011 NA NA <0.2 NA NA NA NA NA NA <5 NA <0.2 NA NA NA <10 NA NA NA NA 49.5 NA NA NA <0.1 347 NA NA CB -07 DUP 07/14/2011 NA NA <0.2 NA NA NA NA NA NA <5 NA <0.2 NA NA NA <10 NA NA NA NA 49.6 NA NA NA <0.1 293 NA NA CB -07 11/08/2011 NA NA <0.2 NA NA NA NA NA NA <5 NA <0.2 NA NA NA <10 NA NA NA NA 49.6 NA NA NA <0.1 372 NA NA CB -07 04/10/2012 NA NA <0.2 NA NA NA NA NA NA <5 NA <0.2 NA NA NA 12.8 NA NA NA NA 47.2 NA NA NA <0.1 285 NA NA CB -07 07/17/2012 NA NA <0.2 NA NA NA NA NA NA <5 NA <0.02 NA NA NA <10 NA NA NA NA 66.9 NA NA NA <0.1 311 NA NA CB -07 11/16/2012 NA NA <0.2 NA NA NA NA NA NA <5 NA 0.022 b NA NA NA <10 NA NA NA NA 67.4 NA NA NA <0.1 238 NA NA CB -07 04/04/2013 NA NA <0.05 NA NA NA NA NA NA <5 NA <0.023 NA NA NA 19.4 NA NA NA NA 28 NA NA NA <0.2 130 NA NA CB -07 07/02/2013 NA NA <0.05 NA NA NA NA NA NA <5 NA <0.023 NA NA NA 2.24 NA NA NA NA 39 NA NA NA <0.2 210 NA NA CB -07 11/06/2013 NA NA <0.05 NA NA NA NA NA NA <5 NA 0.06 NA NA NA 1.92 NA NA NA NA 42 NA NA NA <0.2 210 NA NA CB -07 04/17/2014 NA NA <0.05 NA NA NA NA NA NA <5 NA <0.023 NA NA NA 13.5 NA NA NA NA 36 NA NA NA <0.2 270 NA NA CB -07 07/10/2014 NA NA <0.05 NA NA NA NA NA NA <5 NA <0.023 NA NA NA 6.63 NA NA NA NA 30 NA NA NA <0.2 170 NA NA CB -07 11/04/2014 NA NA <0.05 NA NA NA NA NA NA <5 NA <0.023 NA NA NA 6.13 NA NA NA NA 38 NA NA NA <0.2 120 NA NA CB -07 04/06/2015 NA NA <0.05 NA NA NA <1 NA NA <5 NA <0.023 4.21 NA NA 21.3 23.1 NA NA NA 36 NA NA NA <0.2 310 NA <5 CB -07 07/08/2015 <0.05 NA <0.05 <10 <1 NA <1 <1 NA <5 0.52 2.2 3.5 14.3 NA 14.6 19.9 184 NA 172 56 <0.1 <0.2 NA <0.2 190 0.994 <5 CB -07 09/04/2015 <0.05 <0.05 NA NA <1 <I NA <1 <1 NA NA NA NA 1.09 <1 NA NA 283 299 NA NA NA <0.2 <0.2 NA NA NA NA CB -07 11/02/2015 NA NA <0.05 NA NA NA 1.89 NA NA <5 <0.023 <0.1 4.27 NA NA 23.2 7.57 NA NA 225 21 NA NA NA <0.2 180 NA <5 CB -07 12/08/2015 <0.2 NA <0.2 <10 1.5 NA 1.4 <0.5 NA <0.5 <0.02 NA 6.76 10.9 NA 11.3 10.9 300 NA 320 25.3 <0.1 <0.1 NA <0.1 242 <1 <2.9 CB -07 01/19/2016 <0.05 NA <0.05 <10 <1 NA 1.02 1.07 NA <1 0.035 NA 7.61 8.28 NA 8.13 14 316 NA 318 31 <0.1 <0.2 NA <0.2 200 0.993 <5 MW -15A 03/04/2015 <0.05 NA <0.05 <10 <1 NA <1 <1 NA <1 0.125 NA 1.11 <1 NA <1 14.8 117 NA 120 5.3 <0.5 <0.2 NA <0.2 120 0.583 <5 MW -15A 05/20/2015 <0.05 NA <0.05 <10 <1 NA <1 <1 NA <1 0.177 NA 0.884 <1 NA <1 11.7 100 NA 102 5.3 <0.1 <0.2 NA <0.2 99 0.395 <5 MW -15A 12/08/2015 <0.2 NA <0.2 <10 <0.5 NA <0.5 <0.5 NA <0.5 <0.02 NA <5 <0.5 NA <0.5 13.2 90 NA 93 5.8 <0.1 <0.1 NA <0.1 <25 <1 <3 MW -15A 01/18/2016 <0.05 NA <0.05 <10 <1 NA <1 <1 NA <1 0.029 NA 0.948 <1 NA <1 11.9 101 NA 100 5.8 <0.1 <0.2 NA <0.2 91 0.347 <5 MW -16A 03/11/2015 <0.05 NA <0.05 <10 <1 NA <1 <1 NA <1 <0.01 NA 2.67 <1 NA <1 14.9 181 NA 184 33 <0.1 <0.2 NA <0.2 260 2 <5 MW -16A DUP 03/11/2015 <0.05 NA <0.05 12 <1 NA <1 <1 NA <1 <0.01 NA 2.72 <1 NA <1 14.7 179 NA 186 36 <0.1 <0.2 NA <0.2 260 2.1 <5 MW -16A 05/28/2015 <0.05 NA <0.05 <10 <1 NA <1 <1 NA <1 0.022 NA 2.57 <1 NA <1 17.5 204 NA 203 33 <0.1 <0.2 NA <0.2 350 0.725 <5 MW -16A 09/08/2015 <0.05 <0.05 NA NA <1 <1 NA <1 <1 NA NA NA NA <1 <1 NA NA 238 242 NA NA NA <0.2 <0.2 NA NA NA NA MW -16A 12/08/2015 <0.2 NA <0.2 18.6 <0.5 NA <0.5 <0.5 NA 0.64 0.057 NA <5 <0.5 NA <0.5 22.8 250 NA 240 46.5 <0.1 Ml <0.1 NA <0.1 355 <1 3.3 MW -16A 01/18/2016 <0.05 NA <0.05 <10 <1 NA <1 <1 NA <1 0.036 NA 2.95 <1 NA <1 22.1 331 NA 275 59 <0.1 <0.2 NA <0.2 330 0.748 <5 MW -17A 03/03/2015 <0.05 NA <0.05 11 <1 NA <1 4.06 NA 5.16 <0.01 NA 4.23 <1 NA <1 15.4 569 NA 507 140 <0.5 <0.2 NA <0.2 1300 5.1 19 MW -17A 05/21/2015 <0.05 NA <0.05 81 1.07 NA <1 7.13 NA 4.77 0.056 NA 4.51 <1 NA <1 14 601 NA 536 160 <0.1 <0.2 NA <0.2 1200 3.9 67 MW -17A 12/09/2015 <0.2 NA <0.2 18.2 <0.5 NA <0.5 3.5 NA 3.4 0.06 NA <5 <0.5 NA <0.5 14.8 570 NA 560 144 <0.1 <0.1 NA <0.1 1100 2.5 12.2 MW -17A 01/19/2016 <0.05 NA <0.05 <10 <1 NA <1 33.8 NA 6.1 0.014 NA 4.27 <1 NA <1 14.1 584 NA 602 170 <0.1 <0.2 NA <0.2 1100 1.5 13 Saprolite MW -08S 03/06/2015 <0.05 NA <0.05 <10 1.51 NA 1.59 2.3 NA 2.47 0.13 NA 2.02 1.08 NA 1.17 18.8 4380 NA 4410 260 <1 <0.2 NA <0.2 1500 0.348 <5 MW -085 05/27/2015 <0.05 NA <0.05 <10 3.03 NA 3.2 1.89 NA 1.65 0.123 NA 1.91 1.21 NA 1.41 15 4140 NA 4160 290 <0.2 <0.2 NA <0.2 1900 0.294 <5 MW -08S 09/01/2015 <0.05 <0.05 NA NA 2.75 2.64 NA 2.38 2.41 NA NA NA NA 1.22 1.15 NA NA 3960 3960 NA NA NA <0.2 <0.2 NA NA NA NA MW -08S 12/09/2015 <0.2 M1 NA <0.2 <10 3.7 NA 3.9 1.6 NA 1.5 0.14 NA <5 1.3 NA 1.2 14.4 3400 NA 3700 243 <0.1 M1 <0.1 NA <0.1 1280 <1 <3 MW -08S 01/20/2016 <0.05 NA <0.05 <10 3.45 NA 3.72 1.58 NA 1.56 0.144 NA 1.71 1.05 NA 1.13 14.3 3620 NA 3540 260 <0.1 <0.2 NA <0.2 1300 0.189 <5 MW -095 04/27/2015 0.08 NA <0.05 <10 <1 NA <1 5.27 NA 5.24 0.695 NA 4.76 41.9 NA 36.6 18.1 3260 NA 3080 250 <0.5 0.225 NA 0.294 1700 0.357 <5 MW -09S 05/21/2015 <0.05 NA 0.22 <10 <1 NA <1 3.46 NA 3.92 0.666 NA 3.94 39.3 NA 40.6 17.5 3040 NA 2950 270 <0.5 0.213 NA <0.2 1700 0.246 <5 MW -09S 09/02/2015 <0.05 <0.05 NA NA <1 <1 NA 2.89 3.16 NA NA NA NA 36.7 38.3 NA NA 2730 2850 NA NA NA <0.2 0.223 NA NA NA NA MW -09S 12/09/2015 <0.2 NA <0.2 <10 <0.1 NA <0.5 3.4 NA 3.2 0.77 NA <5 41.5 NA 39.7 17.2 2700 NA 3000 290 <0.1 0.2 NA 0.19 1410 <1 <3 MW -09S 01/20/2016 <0.05 NA 0.09 <10 <1 NA <1 10.8 NA 9.71 0.749 NA 3.66 35.4 NA 34 17 2620 NA 2600 290 <0.1 <0.2 NA <0.2 1.500 0.273 <5 Transition Zone CB -08 11/18/2010 NA NA 0.25 NA NA NA NA NA NA <5 NA 1.6 NA NA NA 25 NA NA NA NA 108 NA NA NA <0.1 645 NA NA CB -08 04/12/2011 NA NA <0.02 NA NA NA NA NA NA 7.7 NA 1.8 NA NA NA 24.2 NA NA NA NA 119 NA NA NA <0.1 617 NA NA CB -08 07/15/2011 NA NA <0.02 NA NA NA NA NA NA 41b NA 1.4 NA NA NA 21.2 NA NA NA NA 100 NA NA NA <0.1 700 NA NA CB -08 11/08/2011 NA NA 0.2 NA NA NA NA NA NA <5 NA 1.7 NA NA NA 25.1 NA NA NA NA 96.3 NA NA NA <0.1 764 NA NA CB -08 04/11/2012 NA NA <0.02 NA NA NA NA NA NA <5 NA 1.5 NA NA NA 19.2 NA NA NA NA 113 NA NA NA <0.1 581 NA NA CB -08 07/17/2012 NA NA <0.02 NA NA NA NA NA NA <5 NA 1.9 NA NA NA 15.2 NA NA NA NA 63.4 NA NA NA <0.1 407 NA NA CB -08 11/15/2012 NA NA <0.02 NA NA NA NA NA NA <5 NA 1.8 NA NA NA 13 NA NA NA NA 97.4 NA NA NA <0.1 516 NA NA CB -08 04/04/2013 NA NA 0.08 NA NA NA NA NA NA <5 NA 1.6 NA NA NA 18.1 NA NA NA NA 90 NA NA NA <0.2 730 NA NA CB -08 DUP 04/04/2013 NA NA 0.08 NA NA NA NA NA NA <5 NA 1.6 NA NA NA 18 NA NA NA NA 89 NA NA NA <0.2 740 NA NA CB -08 07/02/2013 NA NA 0.08 NA NA NA NA NA NA <5 NA 1.6 NA NA NA 16.5 NA NA NA NA 81 NA NA NA <0.2 600 NA NA CB -08 11/06/2013 NA NA 0.1 NA NA NA NA NA NA <5 NA 2.1 NA NA NA 17.5 NA NA NA NA 85 NA NA NA <0.2 490 NA NA P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 3 of 8 TABLE 1-1 GROUNDWATER RESULTS FOR SELECT MONITORING WELLS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 4 of 8 Analytical Parameter Vanadium Vanadium Vanadium Zinc Zinc Zinc As(III) As(V) MMAs DMAs As (UK) Fe(II) Fe(III) Mn(II) Mn(IV) Se(IV) Se(VI) SeCN MCSe(IV) SeMe Se (UK) DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT Reporting Units ug/I ug/I ug/I ug/I ug/1 ug/I ug/I ug/I ug/l ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/I 15A NCAC 02L Standard NE NE 0.3* NE NE 1000 NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE Sample ID Sample Collection Date Analytical Results Alluvial CB -07 11/18/2010 NA NA NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 04/12/2011 NA NA NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 07/14/2011 NA NA NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 DUP 07/14/2011 NA NA NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 11/08/2011 NA NA NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 04/10/2012 NA NA NA NA NA 10.4 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 07/17/2012 NA NA NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 11/16/2012 NA NA NA NA NA 21.2 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 04/04/2013 NA NA NA NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 07/02/2013 NA NA NA NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 11/06/2013 NA NA NA NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 04/17/2014 NA NA NA NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 07/10/2014 NA NA NA NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 11/04/2014 NA NA NA NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 04/06/2015 NA NA NA NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 07/08/2015 0.344 NA 0.574 186 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 09/04/2015 0.483 0.503 NA 10 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 11/02/2015 NA NA 0.337 NA NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 12/08/2015 <1 NA <1 47 NA 38 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -07 01/19/2016 <0.3 NA <0.3 73 NA 86 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -15A 03/04/2015 <0.3 NA <0.3 9 NA 7 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -15A 05/20/2015 <0.3 NA <0.3 7 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -15A 12/08/2015 <1 NA <1 <10 NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -15A 01/18/2016 <0.3 NA <0.3 5 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -16A 03/11/2015 <0.3 NA <0.3 <5 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -16A DUP 03/11/2015 <0.3 NA <0.3 <5 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -16A 05/28/2015 <0.3 NA <0.3 <5 NA <5 NA NA NA NA NA 108 55.7 2260 <0.098 NA NA NA NA NA NA MW -16A 09/08/2015 0.369 <0.3 NA <5 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -16A 12/08/2015 <1 NA <1 <10 NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -16A 01/18/2016 <0.3 NA <0.3 <5 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -17A 03/03/2015 <0.3 NA 0.401 18 NA 19 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -17A 05/21/2015 0.347 NA 2.63 77 NA 48 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -17A 12/09/2015 <1 NA <1 <10 NA <0.18 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -17A 01/19/2016 <0.3 NA <0.3 9 NA 8 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Saprolite MW -08S 03/06/2015 <0.3 NA 0.342 37 NA 9 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -08S 05/27/2015 <0.3 NA <0.3 11 NA 14 0.115 <0.11 <0.054 <0.038 <0.054 4.9 <6.7 3350 <0.098 0.171 0.965 <0.048 <0.033 <0.033 <0.033 MW -08S 09/01/2015 0.643 0.558 NA 115 102 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -08S 12/09/2015 <1 NA <1 L3 89 NA 130 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -08S 01/20/2016 <0.3 NA <0.3 17 NA 32 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -095 1 04/27/2015 <0.3 1 NA <0.3 9 NA 9 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -09S 05/21/2015 <0.3 NA <0.3 40 NA 49 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -09S 09/02/2015 0.829 <0.3 NA 12 13 NA NA NA NA NA NA NA NA NA NA <0.296 24.1 <0.149 <0.296 <0.296 <0.5 MW -09S 12/09/2015 <1 NA <1 L1 13 NA 11 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -09S 01/20/2016 <0.3 NA <0.3 13 NA 12 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Transition Zone CB -08 11/18/2010 NA NA NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 04/12/2011 NA NA NA NA NA 71.7 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 07/15/2011 NA NA NA NA NA 13.1 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 11/08/2011 NA NA NA NA NA 11.6 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 04/11/2012 NA NA NA NA NA 10.9 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 07/17/2012 NA NA NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -OS 11/15/2012 NA NA NA NA NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 04/04/2013 NA NA NA NA NA 9 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 DUP 04/04/2013 NA NA NA NA NA 10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 07/02/2013 NA NA NA NA NA 9 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 11/06/2013 NA NA NA NA NA 17 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 4 of 8 TABLE 1-1 GROUNDWATER RESULTS FOR SELECT MONITORING WELLS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Notes: =- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential Deg C = Degree Celsius ft = feet DIS = Dissolved mg/I = milligrams per liter mV = millivolts TOT = Total mg-N/L = miligram nitrogen per liter S.U. = Standard Unit Temp = Temperature NE = Not established ug/I = microgram per liter DO = Dissolved Oxygen NTU = nephelometric turbidity unit umhos/cm = micro mhos per centimeter L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. B - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 30X the concentration in the method blank. Analyte concentration in sample could be due to contamination. CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis. M1 = Matrix spike recovery was High: the associated Laboratory Control Spike (l -CS) was acceptable. NI = This sample was inadvertently collected with sample running through the Flow cell and should be considered invalid based on possible contamination from the flow cell. < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. NA = Not analyzed for March/June 2015 NPDES Compliance Sampling Event Spec Cond = Specific Conductance NM = Not Measured DUP = Duplicate Prepared by: BFR Checked by: TDP P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 5 of 8 Analytical Parameter PN Water Level Temp Spec Cond DO OR Eh Turbidity Ferrous Iron Alkalinity Aluminum Aluminum Aluminum Antimony Antimony Antimony Arsenic Arsenic Arsenic Barium Barium Barium Beryllium Beryllium Beryllium Bi carbonate Alkalinity Boron Boron Boron DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT Reporting Units S.U. ft Deg C umhos/cm mg/I mV mV NTUs mg/I mg/l ug/l ug/l ug/l ug/l ug/l ug/I ug/l ug/I ug/l ug/l ug/I ug/l ug/I ug/I ug/I mg/l ug/I ug/I ug/1 15A NCAC 02L Standard 6.5-8.5 NE NE NE NE NE NE NE NE NE NE NE NE NE NE 1* NE NE SO NE NE 700 NE NE 4* NE NE NE 700 Sample ID Sample Collection Date Field Parameters Analytical Results CB -08 DUP 11/06/2013 5.1 45.46 15 747 2.4 456 661 5.6 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 184 NA NA NA NA NA NA 1230 CB -08 04/17/2014 5.2 46.92 15 850 1.9 365 570 4 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 189 NA NA NA NA NA NA 1570 CB -08 07/10/2014 5.0 46.92 16 847 2 372 577 3.3 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 205 NA NA NA NA NA NA 1700 CB -08 DUP 07/10/2014 5.0 46.92 16 847 2 372 577 3.3 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 195 NA NA NA NA NA NA 1670 CB -08 11/03/2014 5.1 49.40 16 884 1.07 502 707 2.26 NM NA NA NA NA NA NA <1 NA NA <1 NA NA 177 NA NA NA NA NA NA 1860 CB -08 04/07/2015 5.1 50.29 16 1021 1.49 122 327 2.16 NM 8.5 NA NA 190 NA NA <1 NA NA <1 NA NA 201 NA NA <1 8.5 NA NA 2350 CB -08 DUP 04/07/2015 5.1 50.29 16 1021 1.49 122 327 2.16 NM 7.9 NA NA 199 NA NA <1 NA NA <1 NA NA 207 NA NA <1 7.9 NA NA 2330 CB -08 07/06/2015 5.1 49.45 16 964 1.94 297 502 2.35 NM 13.8 134 NA 175 <1 NA <1 <1 NA <1 169 NA 180 <1 NA <1 13.8 2350 NA 2310 CB -08 DUP 07/06/2015 5.1 49.45 16 964 1.94 297 502 2.35 NM 13.5 NA NA 167 NA NA <1 NA NA <1 NA NA 177 NA NA <1 13.5 NA NA 2320 CB -08 11/02/2015 5.5 50.93 16 991 1.7 479 684 1.3 NM 12.9 NA NA 250 NA NA <1 NA NA <1 NA NA 295 NA NA <1 12.9 NA NA 2640 CB -08 12/08/2015 5.3 49.32 14 947 1.35 226 431 1.6 0 15.4 120 NA 170 <0.5 NA <0.5 0.55 NA 0.63 150 NA 170 0.33 NA 0.33 15.4 2400 NA 2500 CB -08 01/20/2016 5.3 46.90 11 886 3.3 456 661 1.1 0 12.9 129 NA 148 <1 NA <1 <1 NA <1 159 NA 161 <1 NA <1 12.9 2360 NA 2300 MW -09D 05/04/2015 5.8 29.20 16 2175 3.7 37 242 5.57 2.5 40 45 NA 187 <1 NA <1 <1 NA <1 302 NA 304 <1 NA <1 40 4480 NA 4420 MW -09D 05/21/2015 5.5 29.16 18 2175 0.39 -138 67 1.99 1.5 43 37 NA 56 <1 NA <1 <1 NA <1 233 NA 237 <1 NA <1 43 4630 NA 4620 MW -09D 09/02/2015 5.6 29.54 20 2099 1.13 164 369 9.66 NM NA 20 21 NA <1 <1 NA <1 <1 NA 156 155 NA <1 <1 NA NA 4930 5030 NA MW -09D 12/09/2015 5.2 28.81 13 1980 0.22 197 402 8.9 0 37.2 <100 NA <100 <0.5 NA <0.5 <0.5 NA <0.5 120 NA 140 <0.2 NA <0.2 37.2 5400 NA 5400 M1 MW -090 01/20/2016 5.7 28.24 7 2034 0.5 142 347 0.9 0.5 36.8 20 NA 21 <1 NA <1 <1 NA <1 146 NA 127 <1 NA <1 36.8 5190 NA 5540 MW -15D 03/04/2015 6.2 4.85 14 132 1.53 48 253 4.33 <0.5 39 5 NA 134 <1 NA <1 <1 NA <1 62 NA 62 <.1 NA <1 39 <50 NA <50 MW -15D 05/20/2015 5.7 6.90 15 94 2.78 72 277 1.83 <0.5 30 5 NA 16 <1 NA <1 <1 NA <1 59 NA 58 <1 NA <1 30 <50 NA <50 MW -15D 12/08/2015 6.4 4.84 14 118 0.61 185 390 8.35 0 37.2 <100 NA <100 <0.5 NA <0.5 <0.5 NA <0.5 L1 51 NA 48 <0.2 NA <0.2 37.2 <50 NA <50 MW -15D 01/18/2016 6.3 4.42 7 114 1.5 185 390 2.5 0 32.4 9 NA 70 <1 NA <1 <1 NA <1 64 NA 59 <1 NA <1 32.4 <50 NA <50 MW -18D 05/04/2015 5.8 7.50 13 874 1.35 115 320 4.26 2.5 43 15 NA 168 <1 NA <1 <1 NA <1 66 NA 67 <1 NA <1 43 796 NA 807 MW -18D 05/28/2015 6.1 8.27 17 914 0.78 -126 79 5.04 2 62 19 NA 93 <1 NA <1 <1 NA <1 53 NA 54 <1 NA <1 62 789 NA 793 MW -18D 09/04/2015 6.0 9.40 18 893 0.3 5 210 2.56 NM NA 23 22 NA <1 <1 NA <1 <1 NA 45 43 NA <1 <1 NA NA 818 830 NA MW -18D 01/19/2016 6.0 6.22 8 890 2.4 115 3204.2 2 32.4 9 NA 13 <1 NA <1 <1 NA <1 50 NA 53 <1 NA <1 32.4 837 NA 884 MW -18D 12/08/2015 5.8 6.22 14 878 0.7 260 465 4.76 3.5 38.7 <100 NA <100 <0.5 NA <0.5 <0.5 NA <0.5 36 NA 37 <0.2 NA <0.2 38.7 860 NA 850 Bedrock CB-08BR 05/11/2015 6.7 48.76 16 458 4.51 44 249 5.39 <0.5 98 <5 NA 93 <1 NA <1 <1 NA <1 34 NA 40 <1 NA <1 98 291 NA 343 CB-08BR 05/22/2015 6.8 48.55 15 352 1.89 -55 150 9.14 <0.5 92 <5 NA 110 <1 NA <1 <1 NA <1 22 NA 25 <1 NA <1 92 175 NA 171 CB-08BR 12/08/2015 7.2 48.65 15 269 0.32 -37 168 3.07 0.5 96.2 <100 NA <100 <0.5 NA <0.5 <0.5 NA <0.5 17 NA 18 <0.2 NA <0.2 96.2 78 NA 78 CB-08BR 01/20/2016 7.1 47.03 7 275 3.6 49 187 8.8 0.5 91 <5 NA 130 <1 NA <1 <1 NA <1 18 NA 20 <1 NA <1 91 91 NA 87 MW-09BR 05/04/2015 7.2 31.98 19 1022 4.39 -22 183 14.9 <0.5 77 7 NA 44 <1 NA <1 <1 NA <1 121 NA 129 <1 NA <1 77 489 NA 490 MW-09BR 05/21/2015 6.7 31.90 20 1039 3.01 -107 98 15.5 1.5 73 6 NA 12 <1 NA <1 <1 NA <1 96 NA 100 <1 NA <1 73 554 NA 530 MW-09BR 09/02/2015 7.2 1 32.00 22 1176 0.89 -49 156 15.4 NM NA 6 6 NA <1 <1 NA <1 <1 NA 105 107 NA <1 <1 NA NA 660 672 NA MW-09BR 12/09/2015 7.0 31.28 14 1259 0.21 -119 86 3.37 2.5 101 <100 NA <100 <0.5 NA <0.5 0.58 NA 0.84 99 NA 120 <0.2 NA <0.2 101 930 NA 960 MW-09BR 01/20/2016 7.2 30.67 5 1367 0.7 -123 82 3 2 109 12 NA 69 <1 NA <1 <1 NA <1 116 NA 116 <1 NA <1 109 1200 NA 1160 MW-18BR 05/04/2015 5.9 7.92 16 923 1.4 123 328 5.39 <0.5 47 9 NA 66 <1 NA <1 <1 NA <1 49 NA 48 <1 NA <1 47 878 NA 892 MW-18BR 05/28/2015 5.7 8.45 17 900 0.81 2 207 1.95 <0.5 42 12 NA 30 <1 NA <1 <1 NA <1 43 NA 43 <1 NA <1 42 861 NA 851 MW-18BR 09/04/2015 5.9 9.52 18 859 0.44 67 272 0.91 NM NA 9 11 NA <1 <1 NA <1 <1 NA 42 40 NA <1 <1 NA NA 876 882 NA MW-18BR 12/08/2015 5.6 6.75 13 889 0.6 297 502 0.99 0 27.1 <100 NA <100 <0.5 NA <0.5 <0.5 NA <0.5 L3 33 NA 33 <0.2 NA <0.2 27.1 690 NA 900 MW-18BR 01/19/2016 5.8 6.70 8 913 0.5 191 396 0.9 0 26.8 7 NA 15 <1 NA <1 <1 NA <1 37 NA 41 <1 NA <1 26.8 859 NA 1 974 Notes: =- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential Deg C = Degree Celsius ft = feet DIS = Dissolved mg/I = milligrams per liter mV = millivolts TOT = Total mg-N/L = miligram nitrogen per liter S.U. = Standard Unit Temp = Temperature NE = Not established ug/I = microgram per liter DO = Dissolved Oxygen NTU = nephelometric turbidity unit umhos/cm = micro mhos per centimeter L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias. B - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 30X the concentration in the method blank. Analyte concentration in sample could be due to contamination. CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis. M1 = Matrix spike recovery was High: the associated Laboratory Control Spike (l -CS) was acceptable. NI = This sample was inadvertently collected with sample running through the Flow cell and should be considered invalid based on possible contamination from the flow cell. < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. NA = Not analyzed for March/June 2015 NPDES Compliance Sampling Event Spec Cond = Specific Conductance NM = Not Measured DUP = Duplicate Prepared by: BFR Checked by: TDP P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 5 of 8 TABLE 1-1 GROUNDWATER RESULTS FOR SELECT MONITORING WELLS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Notes: =- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential Deg C = Degree Celsius ft = feet DIS = Dissolved mg/I = milligrams per liter my = millivolts TOT = Total mg-N/L = miligram nitrogen per liter S.U. = Standard Unit Temp = Temperature NE = Not established ug/I = microgram per liter DO = Dissolved Oxygen NTU = nephelometric turbidity unit umhos/cm = micro mhos per centimeter L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias B -Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 1OX the concentration in the method blank. Analyte concentration in sample could be due to contamination. CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis. M1 = Matrix spike recovery was High: the associated Laboratory Control Spike (l -CS) was acceptable. NI = This sample was inadvertently collected with sample running through the Flow cell and should be considered invalid based on possible contamination from the flow cell. < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. NA = Not analyzed for March/June 2015 NPDES Compliance Sampling Event Spec Cond = Specific Conductance NM = Not Measured DUP = Duplicate Prepared by: BER Checked by: TDP P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 6 of 8 Analytical Parameter Cadmium DIS Cadmium DIS (0.1u) Cadmium TOT Calcium TOT Carbonate Alkalinity Chloride Chromium (Hexavalent) Cr(VI) Speciation Chromium Chromium Chromium Cobalt Cobalt Cobalt Copper Copper Copper Iron Iron Iron Lead Lead Lead Magnesium Manganese Manganese Manganese DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT DIS DIS (O.lu) TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT TOT DIS DIS (0.1u) TOT Reporting Units ug/I ug/l ug/I mg/I mg/I mg/l ug/l ug/I ug/l ug/I ug/I ug/I ug/l ug/I ug/I ug/I ug/I ug/I ug/I ug/l ug/I u9/1 ug/l mg/I ug/l ug/1 ug/l 15A NCAC 02L Standard NE NE 2 NE NE 250 NE NE NE NE 10 NE NE 1* NE NE 1000 NE NE 300 NE NE 15 NE NE NE 50 Sample ID Sample Collection Date Analytical Results CB -08 DUP 11/06/2013 NA NA <1 NA NA 160 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 180 NA NA <1 NA NA NA 765 CB -08 04/17/2014 NA NA <1 NA NA 190 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 115 NA NA <1 NA NA NA 857 CB -08 07/10/2014 NA NA <1 NA NA 190 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 187 NA NA <1 NA NA NA 904 CB -08 DUP 07/10/2014 NA NA <1 NA NA 190 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 134 NA NA <1 NA NA NA 889 CB -08 11/03/2014 NA NA <1 NA NA 210 NA NA NA NA <5 NA NA NA NA NA <5 NA NA 63 NA NA <1 NA NA NA 968 CB -08 04/07/2015 NA NA <1 119 <5 220 NA NA NA NA <5 NA NA 2.54 NA NA <5 NA NA 63 NA NA <1 38.5 NA NA 1120 CB -08 DUP 04/07/2015 NA NA <1 1 117 <5 220 NA NA NA NA <5 NA NA 2.76 NA NA <5 NA NA 76 NA NA <1 38.1 NA NA 1110 CB -08 07/06/2015 <1 NA <1 107 <5 220 NA NA <1 NA <5 2.89 NA 2.68 14.5 NA 22 14 NA 46 <1 NA <1 37.8 1090 NA 1080 CB -08 DUP 07/06/2015 NA NA <1 105 <5 220 NA NA NA NA <5 NA NA 2.71 NA NA 26 NA NA 39 NA NA <1 36.7 NA NA 1080 CB -08 11/02/2015 NA NA <1 75.3 <5 220 NA NA NA NA <5 NA NA 2.98 NA NA <5 NA NA 139 NA NA <1 27.4 NA NA 1160 CB -08 12/08/2015 0.46 NA 0.44 96 <5 221 0.39 NA 0.77 NA 0.94 B 3.3 NA 3.5 13.9 CR NA <1 <50 NA <50 1.7 CR NA <0.1 35.2 1100 NA 1100 CB -08 01/20/2016 <1 NA <1 97.9 <5 200 0.27 NA <1 NA <1 4.2 NA 4.23 <1 NA <1 <10 NA 16 <1 NA <1 35.6 1220 NA 1200 MW -09D 05/04/2015 <1 NA <1 254 <10 Soo NA NA <1 NA <1 25.9 NA 26.9 1.02 NA <1 3170 NA 3300 <1 NA <1 79.4 3690 NA 3670 MW -09D 05/21/2015 <1 NA <1 253 <10 470 NA NA <1 NA <1 16.9 NA 17.8 <1 NA <1 1590 NA 2170 <1 NA <1 81.9 4010 NA 3730 MW -09D 09/02/2015 <1 <1 NA NA NA NA NA NA <1 <1 NA 12 12.9 NA 5.62 <1 NA 1710 1850 NA <1 <1 NA NA 3810 3890 NA MW -09D 12/09/2015 0.36 NA 0.2 236 <5 501 <0.03 NA <0.5 NA <0.5 10.1 NA 8.1 <1 NA <1 450 NA 680 <0.1 NA <0.1 76.5 3500 NA 3400 M1 MW -09D 01/20/2016 <1 NA <1 235 <5 510 <0.03 NA <1 NA <1 1.12 NA 7.06 <1 NA <1 17100 NA 278 <1 NA <1 82.3 3900 NA 3660 MW -15D 03/04/2015 <1 NA <1 8.9 <10 7.3 NA NA <1 NA <1 <1 NA <1 7 NA <1 12 NA 202 <1 NA <1 2.41 196 NA 167 MW -15D 05/20/2015 <1 NA <1 7.15 <10 7.7 NA NA <1 NA <1 <1 NA <1 <1 NA <1 77 NA 109 <1 NA <1 2.18 80 NA 87 MW -15D 12/08/2015 <0.08 NA <0.08 10.3 <5 5.7 0.099 Ml NA <0.5 NA <0.5 <0.5 NA <0.5 <1 NA <1 <50 NA 310 <0.1 NA <0.1 2.91 36 NA 93 MW -15D 01/18/2016 <1 NA <1 8.11 <5 11 0.17 NA <1 NA <1 <1 NA <1 <1 NA <1 <10 NA 143 <1 NA <1 2.5 23 NA 30 MW -18D 05/04/2015 <1 NA <1 110 <10 88 NA NA <1 NA <1 6.95 NA 7.35 <1 NA <1 3670 NA 3530 <1 NA <1 25.8 1810 NA 1510 MW -18D 05/28/2015 <1 NA <1 118 <10 94 NA NA <1 NA <1 4.43 NA 4.61 <1 NA <1 6810 NA 6960 <1 NA <1 27.6 2890 NA 2870 MW -18D 09/04/2015 <1 <1 NA NA NA NA NA NA <1 <1 NA 3.99 3.97 NA <1 <1 NA 9970 10600 NA <1 <1 NA NA 2250 2260 NA MW -18D 01/19/2016 <1 NA <1 104 <5 97 <0.03 NA <1 NA <1 4.43 NA 4.44 <1 NA <1 1990 NA 1840 1.27 NA <1 26 1290 NA 1290 MW -18D 12/08/2015 <0.08 NA <0.08 22.2 <5 96 <0.03 NA <0.5 NA <O.5 4.6 NA 5.5 <1 NA <1 5700 NA 6100 <0.1 NA <0.1 28.8 1300 NA 1300 Bedrock CB-08BR 05/11/2015 <1 NA <1 65.5 <10 47 NA NA <1 NA 3.83 <1 NA <1 <1 NA <1 172 NA 311 <1 NA <1 7.01 591 NA 633 CB-08BR 05/22/2015 <1 NA <1 46.9 <10 26 NA NA <1 NA <1 <1 NA <1 <1 NA <1 345 NA 601 <1 NA <1 5.27 465 NA 473 CB-08BR 12/08/2015 <0.08 NA <0.08 41.1 M1 <5 14 <0.03 NA <0.5 NA <0.5 <0.5 NA <0.5 <1 NA <1 680 NA 840 <0.1 NA 0.1 4.67 400 NA 420 CB-08BR 01/20/2016 <i NA <1 37 <5 14 <0.03 NA <1 NA <1 <1 NA <1 <1 NA <1 590 NA 897 <1 NA <1 4.44 477 NA 452 MW-09BR 05/04/2015 <1 NA <1 121 <10 190 NA NA <1 NA <1 <1 NA <1 <1 NA <1 289 NA 1570 <1 NA <1 17.1 230 NA 247 MW-09BR 05/21/2015 <1 NA <1 129 <10 200 NA NA <1 NA <1 <1 NA <1 <1 NA <1 1390 NA 2540 <1 NA <1 19.5 243 NA 317 MW-09BR 09/02/2015 <1 <1 NA NA NA NA NA NA <1 <1 NA <1 <1 NA 2.31 <1 NA 2600 2710 NA <1 <1 NA 256 256 NA MW-09BR 12/09/2015 0.086 NA <0.08 151 <5 313 <0.03 NA <0.5 NA <0.5 <0.5 NA 0.76 <1 NA <1 5000 NA 5100 <0.1 NA 24.8 420 NA 430 MW-09BR 01/20/2016 <1 NA <1 167 <5 300 <0.03 NA <1 NA <1 <1 NA <1 <1 NA <1 9700 NA 7740 <1 NA 31.4 649 NA 631 MW-18BR 05/04/2015 <1 NA <1 123 <10 97 NA NA <1 NA <1 <1 NA <1 <1 NA <1 27 NA 92 <1 NA 24.4 224 NA 227 MW-18BR 05/28/2015 <1 NA <1 125 <10 96 NA NA <1 NA <1 1.05 NA 1.02 <1 NA <1 122 NA 125 <1 NA rNA 27.8 324 NA 313 MW-18BR 09/04/2015 <1 <1 NA NA NA NA NA NA <1 <1 NA 1.12 <1 NA <1 <1 NA 125 51 NA <1 <1 NA 599 445 NA MW-18BR 12/08/2015 <0.08 NA <0.08 23.7 <5 96.4 0.065 NA <0.5 NA <0.5 1.1 NA 0.98 <1 NA <1 <50 NA <50 <0.1 NA 27.4 200 NA 200 MW-18BR 01/19/2016 <1 NA <1 120 <5 99 0.056 M1 NA <1 NA <1 <1 NA d. <1 NA <1 <10 NA 10 <1 NA 27.3 204 NA 221 Notes: =- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential Deg C = Degree Celsius ft = feet DIS = Dissolved mg/I = milligrams per liter my = millivolts TOT = Total mg-N/L = miligram nitrogen per liter S.U. = Standard Unit Temp = Temperature NE = Not established ug/I = microgram per liter DO = Dissolved Oxygen NTU = nephelometric turbidity unit umhos/cm = micro mhos per centimeter L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias B -Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 1OX the concentration in the method blank. Analyte concentration in sample could be due to contamination. CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis. M1 = Matrix spike recovery was High: the associated Laboratory Control Spike (l -CS) was acceptable. NI = This sample was inadvertently collected with sample running through the Flow cell and should be considered invalid based on possible contamination from the flow cell. < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. NA = Not analyzed for March/June 2015 NPDES Compliance Sampling Event Spec Cond = Specific Conductance NM = Not Measured DUP = Duplicate Prepared by: BER Checked by: TDP P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 6 of 8 TABLE 1-1 GROUNDWATER RESULTS FOR SELECT MONITORING WELLS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Notes: =- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential Deg C = Degree Celsius R = feet DIS = Dissolved mg/I = milligrams per liter my = millivolts TOT = Total mg-N/L = miligram nitrogen per liter S.U. = Standard Unit Temp = Temperature NE = Not established ug/I = microgram per liter DO = Dissolved Oxygen NTU = nephelometric turbidity unit umhos/cm = micro mhos per centimeter L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias B - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 1OX the concentration in the method blank. Analyte concentration in sample could be due to contamination. CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis. Ml = Matrix spike recovery was High: the associated Laboratory Control Spike (l -CS) was acceptable. NI = This sample was inadvertently collected with sample running through the Flow cell and should be considered invalid based on possible contamination from the flow cell. < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. NA = Not analyzed for March/June 2015 NPDES Compliance Sampling Event Spec Cond = Specific Conductance NM = Not Measured DUP = Duplicate Prepared by: BER Checked by: TDP P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 7 of 8 Analytical Parameter Mercury DIS Mercury DIS (0.1u) Mercury TOT Methane Molybdenum Molybdenum Molybdenum Nickel Nickel Nickel Nitrate (as N) Nitrate Potassium Selenium Selenium Selenium Sodium Strontium Strontium Strontium Sulfate Sulfide Thallium Thallium Thallium Total Dissolved Solids Total Organic Carbon Total Suspended Solids DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT TOT DIS DIS (0.1u) TOT TOT DIS DIS (0.1u) TOT DIS DIS (0.1u) TOT Reporting Units ug/I ug/I ug/I ug/I ug/l ug/l ug/I ug/I ug/I ug/I mg-N/L mg/1 mg/I ug/I ug/I ug/I mg/I ug/l ug/1 ug/I mg/I mg/I ug/I ug/I ug/I mg/I mg/I mg/I 15A NCAC 02L Standard NE NE 1 NE NE NE NE NE NE 100 10 10 NE NE NE 20 NE NE NE NE 250 NE NE NE 0.2* 500 NE NE Sample ID Sample Collection Date Analytical Results CB -08 DUP 11/06/2013 NA NA 0.09 NA NA NA NA NA NA <5 NA 2.1 NA NA NA 17 NA NA NA NA 85 NA NA NA <0.2 490 NA NA CB -08 04/17/2014 NA NA 0.1 b NA NA NA NA NA NA <5 NA 2 NA NA NA 18.6 NA NA NA NA 92 NA NA NA <0.2 610 NA NA CB -08 07/10/2014 NA NA 0.11 NA NA NA NA NA NA <5 NA 2 NA NA NA 18.1 NA NA NA NA 97 NA NA NA <0.2 820 NA NA CB -08 DUP 07/10/2014 NA NA 0.11 NA NA NA NA NA NA <5 NA 2 NA NA NA 18.4 NA NA NA NA 97 NA NA NA <0.2 820 NA NA CB -08 11/03/2014 NA NA 0.09 NA NA NA NA NA NA <5 NA 1.8 NA NA NA 20.3 NA NA NA NA 110 NA NA NA <0.2 750 NA NA CB -08 04/07/2015 NA NA 0.11 NA NA NA <1 NA NA <5 NA 1.9 2.74 NA NA 18.6 8.58 NA NA NA 120 NA NA NA <0.2 710 NA <5 CB -08 DUP 04/07/2015 NA NA 0.12 NA NA NA <1 NA NA <5 NA 1.9 2.71 NA NA 20.1 8.5 NA NA NA 120 NA NA NA <0.2 730 NA <5 CB -08 07/06/2015 <0.05 NA 0.13 <10 <1 NA <1 2.67 NA <5 1.8 7.7 2.63 19.2 NA 19.5 8.06 659 NA 655 140 <0.1 <0.2 NA <0.2 840 0.362 <5 CB -08 DUP 07/06/2015 NA NA 0.12 NA NA NA <1 NA NA <5 1.8 7.8 2.64 NA NA 18.9 8.09 NA NA NA 140 NA NA NA <0.2 860 NA <5 CB -08 11/02/2015 NA NA 0.12 NA NA NA <1 NA NA <5 1.7 7.5 2.76 NA NA 20.1 8.77 NA NA 718 110 NA NA NA <0.2 930 NA 18 CB -08 12/08/2015 <0.2 NA <0.2 <10 CL <0.5 NA <0.5 3.2 NA 3.1 1.9 NA <5 19.1 NA 21 7.33 580 NA 650 115 <0.1 <0.1 NA <0.1 652 <1 4.6 CB -08 01/20/2016 <0.05 NA 0.1 <10 <1 NA <1 2.23 NA 2.39 1.6 NA 2.31 16.5 NA 15.4 7.14 578 NA 567 120 <0.1 <0.2 NA <0.2 580 0.738 <5 MW -09D 05/04/2015 <0.05 NA <0.05 <10 2.04 NA 2.16 14.3 NA 14.9 0.439 NA 7.84 32.9 NA 32.2 22.4 1740 NA 1760 250 <0.1 <0.2 NA 0.327 1700 0.658 6 MW -09D 05/21/2015 <0.05 NA <0.05 <10 2.82 NA 2.19 8.33 NA 10.4 0.083 NA 7.31 19.6 NA 14.8 31 1980 NA 1890 270 <0.5 <0.2 NA <0.2 1700 0.548 <5 MW -09D 09/02/2015 <0.05 <0.05 NA NA <1 <1 NA 5.75 5.91 NA NA NA NA 7.92 9.17 NA NA 1720 1740 NA NA NA 0.554 <0.2 NA NA NA NA MW -09D 12/09/2015 <0.2 NA <0.2 <10 0.59 NA <0.5 4.8 NA 5.5 0.52 NA 5.74 23.2 NA 19.8 28.3 1800 NA 1900 242 <0.1 <0.1 NA <0.1 1350 <1 <6.1 MW -09D 01/20/2016 <0.05 NA <0.05 <10 <1 NA <1 1.06 NA 4.46 0.417 NA 4.91 <1 NA 20.7 30 1740 NA 1740 280 <0.1 <0.2 NA <0.2 1400 0.231 <5 MW -15D 03/04/2015 <0.05 NA <0.05 <10 <1 NA <1 1.06 NA <1 0.666 NA 2.89 <1 NA <1 6.94 112 NA 108 0.67 <0.1 <0.2 NA <0.2 76 0.41 <5 MW -15D 05/20/2015 <0.05 NA <0.05 <10 <1 NA <1 <1 NA <1 0.787 NA 2.45 <1 NA <1 6.49 105 NA 99 0.29 <0.1 <0.2 NA <0.2 72 0.209 <5 MW -15D 12/08/2015 <0.2 NA <0.2 <10 <0.5 NA 0.87 0.51 NA <0.5 0.52 NA <5 <0.5 NA <0.5 7.58 97 NA 120 <1 <0.1 <0.1 NA <0.1 81 <1 5.8 MW -15D 01/18/2016 <0.05 NA <0.05 <10 <1 NA <1 <1 NA <1 0.793 NA 2.68 <1 NA <1 7.05 119 NA 118 0.32 <0.1 <0.2 NA <0.2 75 0.166 <5 MW -18D 05/04/2015 <0.05 NA <0.05 <10 1.5 NA 1.45 3.03 NA 2.87 0.102 NA 8.86 <1 NA <1 15.2 316 NA 321 260 <0.1 <0.2 NA <0.2 620 0.697 <5 MW -18D 05/28/2015 <0.05 NA <0.05 14 1.4 NA 1.4 1.67 NA 1.89 0.077 NA 8.62 <1 NA <1 12.9 297 NA 298 280 0.2<0.2 NA <0.2 650 1.3 <5 MW -18D 09/04/2015 <0.05 <0.05 NA NA <1 <1 NA 1.72 1.77 NA NA NA NA <1 <1 NA NA 267 265 NA NA NA <0.2 <0.2 NA NA NA NA MW -18D 01/19/2016 <0.05 NA <0.05 <10 <1 NA <1 2.79 NA 2.49 0.077 NA 6.95 <1 NA <1 12.1 276 NA 290 300 <0.1 <0.2 NA <0.2 610 0.289 <5 MW -18D 12/08/2015 <0.2 NA <0.2 <10 <0.5 NA <0.5 2.1 NA 2.4 0.09 NA 7.71 <0.5 NA <0.5 14.6 260 NA 270 276 <0.1 <0.1 NA <0.1 662 <1 <3 Bedrock CB -0813R 05/11/2015 <0.05 NA <0.05 <10 1.26 NA 1.29 1.83 NA 4.36 0.362 NA 5.11 3.13 NA 3.93 8.79 228 NA 251 34 <0.1 <0.2 NA <0.2 290 <5 CB-08BR 05/22/2015 <0.05 NA <0.05 <10 1.3 NA 1.3 <1 NA <1 0.096 NA 4.07 1.18 NA 1.4 7.74 172 NA 178 31 <0.1 <0.2 NA <0.2 210 5 CB-08BR 12/08/2015 <0.2 NA <0.2 <10 1.4 NA 1.5 <0.5 NA <0.5 <0.02 NA <5 <0.5 NA <0.5 8.14 140 NA 150 24.8 <0.1 <0.1 NA <0.1 212 <6.2 CB-08BR 01/20/2016 <0.05 NA <0.05 <10 1.42 NA 1.33 <1 NA <1 0.014 N1 NA 3.34 <1 NA <1 7.45 153 NA 148 26 <0.1 <0.2 NA <0.2 180 40.167N1 <5 MW-09BR 05/04/2015 <0.05 NA <0.05 <10 4.22 NA 4.17 <1 NA <1 <0.01 NA 16.8 <1 NA <1 24.7 676 NA 697 86 <0.5 <0.2 NA <0.2 760 <5 MW-09BR 05/21/2015 <0.05 NA <0.05 <10 3.47 NA 2.48 <1 NA <1 <0.01 NA 17.8 <1 NA <1 24.6 788 NA 746 87 <0.1 <0.2 NA <0.2 860 <5 MW-09BR 09/02/2015 <0.05 <0.05 NA NA 6.13 5.67 NA <1 <1 NA NA NA NA <1 <1 NA NA 843 860 NA NA NA <0.2 <0.2 NA NA NA MW-09BR 12/09/2015 <0.2 NA <0.2 <10 5.3 NA 6.8 0.56 NA 0.99 <0.02 NA 20.3 <0.5 NA <0.5 32.2 970 NA 1100 106 <0.1 <0.1 NA <0.1 914 <1 9.8 MW-09BR 01/20/2016 <0.05 NA <0.05 <10 4.09 NA 4.79 <1 NA 1.42 0.018 NA 19.3 <1 NA <1 30.9 1140 NA 1100 120 <0.1 <0.2 NA <0.2 890 0.568 20 MW -186R 05/04/2015 <0.05 NA <0.05 <10 <1 NA <1 4.33 NA 4.16 0.261 NA 9.1 1.45 NA 1.4 15.5 434 NA 443 260 <0.1 <0.2 NA <0.2 660 0.373 <5 MW-18BR 05/28/2015 <0.05 NA <0.05 <10 <1 NA <1 4.86 NA 4.67 0.124 NA 9.14 <1 NA <1 15.2 418 NA 415 290 <0.1 <0.2 NA <0.2 660 0.323 <5 MW-18BR 09/04/2015 <0.05 <0.05 NA NA <1 <1 NA 5.16 5.58 NA NA NA NA <1 <1 NA NA 412 406 NA NA NA <0.2 <0.2 NA NA NA NA MW-18BR 12/08/2015<0.2 NA <0.2 <10 <0.5 NA <0.5 4.4 NA 4.1 0.28 NA 9.33 0.72 NA 0.59 15.5 380 NA 400 278 <0.1 <0.1 NA <0.1 659 <1 Ml <2.9 MW-18BR 01/19/2016 <0.05 NA <0.05 <10 <1 NA I <1 4.11 NA 4.16 0.277 NA 8.53 <1 NA <1 14 394 NA 436 290 <0.1 <0.2 NA <0.2 630 0.219 <5 Notes: =- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential Deg C = Degree Celsius R = feet DIS = Dissolved mg/I = milligrams per liter my = millivolts TOT = Total mg-N/L = miligram nitrogen per liter S.U. = Standard Unit Temp = Temperature NE = Not established ug/I = microgram per liter DO = Dissolved Oxygen NTU = nephelometric turbidity unit umhos/cm = micro mhos per centimeter L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias B - Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 1OX the concentration in the method blank. Analyte concentration in sample could be due to contamination. CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis. Ml = Matrix spike recovery was High: the associated Laboratory Control Spike (l -CS) was acceptable. NI = This sample was inadvertently collected with sample running through the Flow cell and should be considered invalid based on possible contamination from the flow cell. < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. NA = Not analyzed for March/June 2015 NPDES Compliance Sampling Event Spec Cond = Specific Conductance NM = Not Measured DUP = Duplicate Prepared by: BER Checked by: TDP P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 7 of 8 TABLE 1-1 GROUNDWATER RESULTS FOR SELECT MONITORING WELLS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Notes: =- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential Deg C = Degree Celsius ft = feet DIS = Dissolved mg/I = milligrams per liter mV = millivolts TOT = Total mg-N/L = miligram nitrogen per liter S.U. = Standard Unit Temp = Temperature NE = Not established ug/I = microgram per liter DO = Dissolved Oxygen NTU = nephelometric turbidity unit umhos/cm = micro mhos per centimeter L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 1OX the concentration in the method blank. Analyte concentration in sample could be due to contamination. CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis. M1 = Matrix spike recovery was High: the associated Laboratory Control Spike (LCS) was acceptable. NI = This sample was inadvertently collected with sample running through the flow cell and should be considered invalid based on possible contamination from the flow cell. < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. NA = Not analyzed for March/June 2015 NPDES Compliance Sampling Event Spec Cond = Specific Conductance NM = Not Measured DUP = Duplicate Prepared by: BER Checked by: TDP P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 8 of 8 Analytical Parameter Vanadium DIS Vanadium DIS (0.1u) Vanadium TOT Zinc DIS Zinc DIS (0.1u) Zinc TOT As(III) As(V) MMAs DMAs As (UK) Fe(II) Fe(III) Mn(II) Mn(IV) Se(IV) Se(VI) SeCN MCSe(IV) SeMe Se (UK) Reporting Units ug/1 ug/1 ug/I ug/I ug/1 ug/I ug/I ug/I ug/l ug/I ug/I ug/I ug/I ug/I ug/I ug/I ug/1 ug/I ug/I ug/I ug/I 15A NCAC 02L Standard NE NE 0.3* NE NE 1000 NE NE NE NE NE NE NE NE NE NE NE NE NE NE NE Sample ID Sample Collection Date Analytical Results CB -08 DUP 11/06/2013 NA NA NA NA NA 18 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 04/17/2014 NA NA NA NA NA 23 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 07/10/2014 NA NA NA NA NA 17 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 DUP 07/10/2014 NA NA NA NA NA 15 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 11/03/2014 NA NA NA NA NA 11 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 04/07/2015 NA NA NA NA NA 31 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 DUP 04/07/2015 NA NA NA NA NA 31 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 07/06/2015 <0.3 NA <0.3 126 NA 112 NA NA NA NA NA NA NA 1020 26.5 NA NA NA NA NA NA CB -08 DUP 07/06/2015 NA NA <0.3 NA NA 105 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 11/02/2015 NA NA 0.379 NA NA 25 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 12/08/2015 <1 NA <1 37 NA 21 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB -08 01/20/2016 <0.3 NA <0.3 16 NA 15 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -09D 05/04/2015 <0.3 NA 0.516 82 NA 80 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -09D 05/21/2015 <0.3 NA <0.3 84 NA 84 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -09D 09/02/2015 0.315 <0.3 NA 47 45 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -09D 12/09/2015 <1 NA <1 L3 <10 NA 13 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -09D 01/20/2016 <0.3 NA <0.3 <5 NA 6 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -15D 03/04/2015 <0.3 NA 0.333 26 NA 9 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -15D 05/20/2015 <0.3 NA 0.502 9 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -15D 12/08/2015 <1 NA <1 <10 NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -15D 01/18/2016 0.561 NA 0.736 <5 NA <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -18D 05/04/2015 <0.3 NA 0.523 16 NA 6 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -18D 05/28/2015 <0.3 NA <0.3 <5 NA <5 NA NA NA NA NA 5540 1730 3290 212 NA NA NA NA NA NA MW -18D 09/04/2015 0.308 0.368 NA 8 <5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -18D 01/19/2016 <0.3 NA <0.3 7 NA 6 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW -18D 12/08/2015 <1 NA <1 <10 NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Bedrock CB-OBBR 05/11/2015 <0.3 NA 0.678 32 NA 30 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-08BR 05/22/2015 <0.3 NA 0.437 27 NA 15 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-08BR 12/08/2015 <1 NA <1 <10 NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA CB-08BR 01/20/2016 <0.3 NA <0.3 <5 NA 5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-09BR 05/04/2015 <0.3 NA 0.379 99 NA 101 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-09BR 05/21/2015 <0.3 NA <0.3 51 NA 28 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-09BR 09/02/2015 <0.3 <0.3 NA 19 17 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-09BR 12/09/2015 <1 NA <1 L3 <10 NA 33 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-09BR 01/20/2016 <0.3 NA <0.3 14 NA 15 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-18BR 05/04/2015 <0.3 NA 0.554 18 NA 8 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-18BR 05/28/2015 <0.3 NA <0.3 6 NA 8 NA NA NA NA NA 67.1 39.7 368 <0.098 <0.12 0.72 <0.072 <0.12 <0.12 <0.12 MW-18BR 09/04/2015 0.362 0.422 NA 11 9 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-18BR 12/08/2015 <1 NA <1 <10 NA <10 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA MW-18BR 01/19/2016 <0.3 NA <0.3 6 NA 6 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA Notes: =- Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ORP = Oxidation Reduction Potential Deg C = Degree Celsius ft = feet DIS = Dissolved mg/I = milligrams per liter mV = millivolts TOT = Total mg-N/L = miligram nitrogen per liter S.U. = Standard Unit Temp = Temperature NE = Not established ug/I = microgram per liter DO = Dissolved Oxygen NTU = nephelometric turbidity unit umhos/cm = micro mhos per centimeter L3 = Analyte recovery in the laboratory control sample (LCS) exceeded QC limits. Analyte presence below reporting limits in associated samples. Results unaffected by high bias B = Target analyte detected in method blank at or above the reporting limit. Target analyte concentration in sample is less than 1OX the concentration in the method blank. Analyte concentration in sample could be due to contamination. CL = The continuing calibration for this compound is outside of Pace Analytical acceptance limits. The results may be biased low. CR = The dissolved metal result was greater than the total metal result for this element. Results were confirmed by reanalysis. M1 = Matrix spike recovery was High: the associated Laboratory Control Spike (LCS) was acceptable. NI = This sample was inadvertently collected with sample running through the flow cell and should be considered invalid based on possible contamination from the flow cell. < = concentration not detected at or above the reporting limit. * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. NA = Not analyzed for March/June 2015 NPDES Compliance Sampling Event Spec Cond = Specific Conductance NM = Not Measured DUP = Duplicate Prepared by: BER Checked by: TDP P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\36.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Asheville_ Select Dataset For Accelerated Remediation.xlsx Page 8 of 8 TABLE 1-2 EXCEEDANCES OF 2L STANDARDS FOR SELECT MONITORING WELLS ASHEVILLE STEAM ELECTRIC PLANT DUKE ENERGY PROGRESS, LLC, ARDEN, NC Prepared by: BER Checked by: TDP Notes: 1 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ug/I = microgram per liter mg/I = milligrams per liter DUP = Duplicate * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Select Dataset Accelerated Remediation (Exceedances Only).xlsx Page 1 of 1 Analytical Parameter Boron Chloride Chromium Cobalt Iron Manganese Selenium Sulfate Thallium Total Dissolved Solids Vanadium TOT TOT TOT TOT TOT TOT TOT TOT Reporting Units ug/I mg/I ug/I ug/I ug/I ug/I ug/1 mg/I ug/1 mg/I ug/I 15A NCAC 02L Standard 700 250 10 1* 300 50 20 250 0.2* 500 0.3* Sample ID Sample Collection Date Analytical Results Alluvial CB -07 11/18/2010 --- --- --- --- 342 236 --- --- --- --- --- CB-07 11/08/2011 --- --- --- --- --- 95.5 --- --- --- --- --- CB-07 07/17/2012 --- --- --- --- --- 130 --- --- --- --- --- CB-07 11/06/2013 --- --- --- --- 816 --- --- --- --- --- --- CB-07 04/06/2015 --- --- --- --- --- --- 21.3 --- --- --- --- CB-07 07/08/2015 --- --- --- --- --- --- --- --- --- --- 0.574 CB -07 09/04/2015 --- --- --- --- --- --- --- --- --- --- --- CB-07 11/02/2015 --- --- --- --- --- --- 23.2 --- --- --- 0.337 MW -15A 03/04/2015 --- --- --- 1.25 879 1060 --- --- --- --- --- MW-15A 05/20/2015 --- --- --- --- --- 840 --- --- --- --- --- MW-15A 12/08/2015 --- --- --- --- --- 1000 --- --- --- --- --- MW-15A 01/18/2016 --- --- --- --- --- 1000 --- --- --- --- --- MW-16A 03/11/2015 --- --- --- 1.01 522 1980 --- --- --- --- --- MW-16A 05/28/2015 --- --- --- 1.35 --- 1940 --- --- --- --- --- MW-16A 12/08/2015 --- --- --- 1.4 420 1600 --- --- --- --- --- MW-16A 01/18/2016 --- --- --- 1.33 --- 1620 --- --- --- --- --- MW-16A DUP 03/11/2015 --- --- --- 1.1 538 2000 --- --- --- --- --- MW-17A 03/03/2015 1060 330 --- 26.3 8970 12800 --- --- --- 1300 0.401 MW -17A 05/21/2015 1540 390 --- 25.8 40600 11900 --- --- --- 1200 2.63 MW -17A 12/09/2015 2000 403 --- 22.6 29500 6700 --- --- --- 1100 --- MW-17A 1 01/19/2016 1 1940 1 410 --- 22.4 24200 6420 1--- --- --- 1100 --- Saprolite MW -OSS 03/06/2015 5030 450 --- 7.73 --- 2850 --- 260 --- 1500 0.342 MW -OSS 05/27/2015 5330 450 --- 3.09 --- 2830 --- 290 --- 1900 --- MW-08S 12/09/2015 5600 398 --- 2.8 --- 2600 --- --- --- 1280 --- MW-08S 01/20/2016 6140 420 --- 2.75 --- 2920 --- 260 --- 1300 --- MW-09S 04/27/2015 4730 560 --- 15.8 --- 4290 36.6 --- 0.294 1700 --- MW-095 1 05/21/2015 1 4800 1 570 --- 5.9 --- 3630 1 40.6 270 --- 1700 --- MW-09S 12/09/2015 5400 1 --- --- 4--- 3400 39.7 290 --- 1410 --- MW -09S 01/20/2016 5560 530 16.1 3.64 --- 3410 34 290 --- 1500 --- Transition Zone CB -08 11/18/2010 972 299 --- --- --- 579 25 --- --- 645 --- CB-08 04/12/2011 1110 319 11 --- 815 683 24.2 --- --- 617 --- CB-08 07/15/2011 1060 271 30.8 --- 370 696 21.2 --- --- 700 --- CB-08 11/08/2011 1360 295 --- --- --- 786 25.1 --- --- 764 --- CB-08 04/11/2012 1080 --- --- --- --- 709 --- --- --- 581 --- CB-08 07/17/2012 841 --- --- --- --- 552 --- --- --- --- --- CB-08 11/15/2012 1140 --- --- --- --- 652 --- --- --- 516 --- CB-08 04/04/2013 1090 --- --- --- --- 679 --- --- --- 730 --- CB-08 07/02/2013 1060 --- --- --- --- 647 --- --- --- 600 --- CB-08 11/06/2013 1230 --- --- --- --- 764 --- --- --- --- CB-08 04/17/2014 1570 --- --- --- --- 857 --- --- --- 610 --- CB-08 07/10/2014 1700 --- --- --- --- 904 --- --- --- 820 --- CB-08 11/03/2014 1860 --- --- --- --- 968 20.3 --- --- 750 --- CB-08 04/07/2015 2350 --- --- 2.54 --- 1120 --- --- --- 710 --- CB-08 07/06/2015 2310 --- --- 2.68 --- 1080 --- --- --- 840 --- CB-08 11/02/2015 2640 --- --- 2.98 --- 1160 20.1 --- --- 930 0.379 CB -08 12/08/2015 2500 --- --- 3.5 --- 1100 21 --- --- 652 --- CB-08 01/20/2016 2300 --- --- 4.23 --- 1200 --- --- --- 580 --- CB-08 DUP 04/04/2013 1110 --- --- --- --- 695 --- --- --- 740 --- CB-08 DUP 11/06/2013 1230 --- --- --- --- 765 --- --- --- --- --- CB-08 DUP 07/10/2014 1670 --- --- --- --- 889 --- --- --- 820 --- CB-08 DUP 04/07/2015 2330 --- --- 2.76 --- 1110 20.1 --- --- 730 --- CB-08 DUP 07/06/2015 2320 --- --- 2.71 --- 1080 --- --- --- 860 --- MW-09D 05/04/2015 4420 500 --- 26.9 3300 3670 32.2 --- 0.327 1700 0.516 MW -09D 05/21/2015 4620 470 --- 17.8 2170 3730 --- 270 --- 1700 --- MW-09D 12/09/2015 5400 M1 501 --- 8.1 680 3400 M1 --- --- --- 1350 --- MW-09D 01/20/2016 5540 510 --- 7.06 --- 3660 20.7 280 --- 1400 --- MW-15D 03/04/2015 --- --- --- --- --- 167 --- --- --- --- 0.333 MW -15D 05/20/2015 --- --- --- --- --- 87 --- --- --- --- 0.502 MW -15D 12/08/2015 --- --- --- --- 310 93 --- --- --- --- --- MW-15D 01/18/2016 --- --- --- --- --- --- --- --- --- --- 0.736 MW -18D 05/04/2015 807 --- --- 7.35 3530 1510 --- 260 --- 620 0.523 MW -18D 05/28/2015 793 --- --- 4.61 6960 2870 --- 280 --- 650 --- MW-18D 12/08/2015 850 --- --- 5.5 6100 1300 --- 276 --- 662 --- MW-18D 01/19/2016 884 --- --- 4.44 1840 1290 --- 300 --- 610 --- Bedrock CB-08BR 05/11/2015 --- --- --- --- 311 633 --- --- --- --- 0.678 CB-08BR 05/22/2015 --- --- --- --- 601 473 --- --- --- --- 0.437 CB-08BR 12/08/2015 --- --- --- --- 840 420 --- --- --- --- --- CB-08BR 01/20/2016 --- --- --- --- 897 452 --- --- --- --- --- MW-09BR 05/04/2015 --- --- --- --- 1570 247 --- --- --- 760 0.379 MW-09BR 05/21/2015 --- --- --- --- 2540 317 --- --- --- 860 --- MW-09BR 12/09/2015 960 1 313 --- --- 5100 430 --- --- --- 914 --- MW-09BR 01/20/2016 1160 300 --- --- 7740 631 --- --- --- 890 --- MW-18BR 05/04/2015 892 --- --- --- --- 227 --- 260 --- 660 0.554 MW-1SBR 05/28/2015 851 --- --- 1.02 --- 313 --- 290 --- 660 --- MW-18BR 12/08/2015 900 --- --- --- --- 200 --- 278 --- 659 --- MW-18BR 01/19/2016 974 --- --- I --- --- 221 --- 290 --- 1 630 --- Prepared by: BER Checked by: TDP Notes: 1 - Bold highlighted concentration indicates exceedance of the 15A NCAC 02L Standard, Appendix 2, April 1, 2013. ug/I = microgram per liter mg/I = milligrams per liter DUP = Duplicate * - Interim Maximum Allowable Concentrations (IMACs) of the 15A NCAC 02L Standard, Appendix 1, April, 1, 2013. P:\Duke Energy Progress. 1026\102. Asheville Ash Basin GW Assessment Plan\16.Corrective Action Plan\Accelerated Remediation Conceptual Approach\Interim Action Plan\Tables\Select Dataset Accelerated Remediation (Exceedances Only).xlsx Page 1 of 1