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Home My WebLink About1203_Burke_JohnsRiver_MSWLF_CDLF_CDLFExpansion_ASDMetals_FID1414400_20200603LaBeRa Powered by Dartnershio. June 3, 2020 Jaclynne Drummond Compliance Hydrogeologist NC Department of Environmental Quality Division of Waste Management - Solid Waste Section 2090 US Highway 70, Swannanoa, NC 28778 Via email: jaclynne.drummond@ncdenr.gov RE: Burke County, Johns River Landfill Permit Number 12-03 Closed C&D-over-MSW Landfill and C&D Expansion Landfill Alternate Source Demonstration for Metals Project No. 2192621 Dear Ms. Drummond: On behalf of Burke County, we are submitting the attached Alternate Source Demonstration (ASD) in response to GPS exceedances for several metals for the Johns River Waste Management Facility, Permit # 12-03. This ASD covers both the closed C&D-over-MSW Landfill and the active C&D Landfill Expansion at the Johns River facility. If we can provide any additional information please call me at (336) 323-0092. Respectfully submitted, LaBella Associates Van Burbach, Ph.D., P.G. Sr. Technical Consultant Enclosure cc: Miles Champion, Burke County 2211 W. Meadowview Road #sos I Greensboro, NC 27407 1 p (336) 323-0092 www.LabeLLapc.com Prepared For: BOARD OF COMMISSIONERS COUNTY OF BURKE P.O. BOX 1486 MORGANTON, NORTH CAROLINA 28680 • n t k ��i C:.yStUi Submitted by: LaBella Associates (Joyce Engineering) 2211 West Meadowview Rd. Suite 1o1 Greensboro, NC 27407 (336) 323-0092 NC License No. C-0782 LaBeRa Powered by partnership. ALTERNATE SOURCE DEMONSTRATION FOR METALS JOHNS RIVER WASTE MANAGEMENT FACILITY C&D-OVER-MSW LANDFILL Permit No.12-03 JUNE 2019 PROJECT NO. 2192621 Alternate Source Demonstration for Metals Johns River Landfill - Permit No. 12-03 Burke County, North Carolina TABLE OF CONTENTS 1.0 INTRODUCTION............................................................................................................................. 1 1.1 Facility History and Regulatory Status................................................................................ 1 1.2 Site Setting and Geology..................................................................................................... 2 1.3 Purpose of this ASD............................................................................................................. 2 2.0 METALS EXCEEDANCES................................................................................................................ 2 3.0 STATISTICAL BACKGROUND CONCENTRATIONS.......................................................................... 3 3.1 Background Data Selection................................................................................................ 3 3.2 Statistical Methods.............................................................................................................. 3 3.2.1 Normality.................................................................................................................................3 3.2.2 Potential Outliers....................................................................................................................4 3.2.3 Upper Tolerance Limits..........................................................................................................4 3.2.4 Treatment of Non -Normal Data.............................................................................................4 3.3 Statistical Background Calculations................................................................................... 4 3.3.1 Cobalt Background Calculation.............................................................................................4 3.3.2 Iron Background Calculation.................................................................................................4 3.3.3 Manganese Background Calculation....................................................................................4 3.3.4 Thallium Background Calculation.........................................................................................4 3.3.5 Vanadium Background Calculation.......................................................................................5 4.0 CONCLUSIONS AND RECOMMENDATIONS.................................................................................. 5 5.0 REFERENCES................................................................................................................................ 6 Burke Co. Johns River Landfill, Permit #12-03 La Bella Associates Alternate Source Determination June 2020 Alternate Source Demonstration for Metals Johns River Landfill - Permit No. 12-03 Burke County, North Carolina Tabies Table 1 Historical Detections of Selected Metals Table 2 Background Data Table 3 Summary of Statistical Background Calculations Charts Chart 1 Cobalt Concentrations vs. Time Chart 2 Iron Concentrations vs. Time Chart 3 Manganese Concentrations vs. Time Chart 4 Thallium Concentrations vs. Time Chart 5 Vanadium Concentrations vs. Time Figure Figure 1 Site Location Map Drawing Drawing 1 Groundwater Potentiometric Surface Map (November 2019) Appendix Appendix A Groundwater Statistical Analysis Worksheets Burke Co. Johns River Landfill, Permit #12-03 La Bella Associates Alternate Source Determination June 2020 1.0 INTRODUCTION 1.1 Facility History and Regulatory Status The Johns River Waste Management Facility (JRWMF) is located in the north -central portion of Burke County, north of Morganton, North Carolina. The 318-acre landfill property is bounded by Lower Creek to the north and east, and the Catawba River to the south. The Catawba River forms Lake Rhodhiss along the southeastern property line (Figure 1). Lake Rhodhiss is a long, narrow lake formed by the Rhodhiss Hydroelectric Dam located approximately 12 miles downstream of the landfill. The John's River flows into the Catawba River near the southwest corner of the landfill property. A Municipal Solid Waste (MSW) transfer facility is located in the eastern half of the property. A site plan showing all the pertinent features of the facility is provided in Drawing 1. An unlined municipal solid waste (MSW) landfill began operation in April 1988 on 28 acres in the southwest corner of the landfill property, but was closed in 1997 to comply with Rule .1627(c)(1O)(A) of the NCSWMR, a regulation governing MSW Landfills units that were not designed with a base liner and leachate collection system. Burke County operated a permitted Construction and Demolition (C&D) disposal area on top of the closed MSW landfill between 1998 and 2015 that closed in 2016. The C&D over MSW Landfill has been in the Assessment Monitoring Program since August 1995. In January 2000, Burke County submitted a Water Quality Assessment Report (WQAR), for the landfill to the NCDEQ. The WQAR determined that the constituents of concern (COCs) at the landfill were several volatile organic compounds (VOCs), specifically: benzene; 1,4-dichlorobenzene; methylene chloride; tetrachloroethylene; and trichloroethylene. The C&D over MSW Landfill entered the Corrective Action Program in August 2003. An Assessment of Corrective Measures (ACM) was submitted to NCDEQ in February 2005. A public meeting was held on May 16, 2006 in order to receive public comments regarding the ACM as required by NCSWMR §.1635 (d). A Corrective Action Plan (CAP) was submitted to NCDEQ in June 2008 and revised in November 2008 with a remedy including monitored natural attenuation (MNA) and phytoremediation. The CAP was approved by NCDEQ in a letter dated January 29, 2009. An addendum to the facility's CAP was submitted to the NCDEQ in August 2013, adding control of landfill gas as a remedy for groundwater impacts on the northeastern side of the C&D-over-MSW Landfill between the old landfill and the new C&D Expansion Landfill. A revised Addendum to the CAP was submitted in January 2018 to add an active gas extraction unit (GEU) to the remedy, and the revised Addendum was approved by the NCDEQ on February 7, 2018. The GEU was installed and began operation in July 2019. A Permit to Construct for Phase 1A of the C&D Expansion Landfill was issued in March 2014, and the County completed construction in July 2014. On August 14, 2014, a Permit to Operate for Phase 1A was issued to the County by the North Carolina Department of Environment and Natural Resources, now the Department of Environmental Quality (NCDEQ). A permit to construct was issued for two additional expansions (Phases 2A and 4) by the NCDEQ on February 07, 2018. Construction of Phase 2A was completed during the summer of 2018, and Phase 2A received a temporary permit to operate after construction in a permit modification from the NCDEQ dated November 7, 2018. The Phase 4 expansion is currently under construction and is expected to be completed in 2020. The C&D Expansion Landfill (Phases 1A and 2A) is under Detection Monitoring. Burke Co. Johns River Landfill, Permit #12-03 La Bella Associates Alternate Source Determination June 2020 1,2 Site Setting and Geology The site has rolling topography with elevations ranging from 975 feet to 1,150 feet above mean sea level (AMSL). The central portion is generally gently sloping and contains the higher elevations; relatively steep slopes and significant drainage features are located around the perimeter. The 100- year flood boundary extends onto the landfill property. The adjacent property to the west of the Johns River Waste Management Facility consists of undeveloped, heavily wooded land. Properties within 2,000 feet of the landfill boundary are covered by surface water or are heavily wooded. The Johns River Waste Management Facility is in close proximity to the Brevard Shear Zone, and is underlain by highly metamorphosed rocks including gneiss, schist, as well as calc-silicate rocks, felsic rocks, and metavolcanic rocks. The dominant rock type at the facility is biotite-muscovite schist, as seen in outcrops, boulders, and rock cores located on site. The structures within limited outcrops indicate that these rocks are complexly -folded, with attitudes that vary from vertical to horizontal in most outcrops. The site regolith is typical of the inner piedmont and consists mostly of silty sand, clayey sand, and sandy silt. The regolith is up to 100 feet thick and varies in thickness with topography. An abundance of rounded gravel, cobble, and boulder -sized alluvial deposits are exposed along the banks of the Catawba River, which borders the site. The greatest accumulation of these deposits is along the southwestern site boundary. These river deposits are 40 feet or more above the current river elevation and have been described as ancient river terrace deposits. 1.3 Purpose of this ASD In recent semiannual sampling events, there have been exceedances of groundwater protection standards (GPS) for several metals, including cobalt, iron, manganese, thallium, and vanadium. The purpose of this Alternate Source Demonstration (ASD) is to address these metals exceedances and establish statistical background values for these metals. 2.0 METALS EXCEEDANCES In the November 2019 sampling event, there were GPS exceedances for five metals, including cobalt, iron, manganese, thallium, and vanadium. Cobalt was detected above its Interim Maximum Allowable Concentration (IMAC) in monitoring wells MW-10, MW-11, MW-12, MW-13, and MW-16S. Iron was detected above the groundwater standard established in 15A NCAC 2L.0202 (NC2L Standard) in monitoring wells MW-10, MW-11, MW-12, MW-13, MW-16S, MW-20, MW-21, MW-30, MW-35, and MW 38. Manganese was in exceedance of its NC2L Standard in monitoring wells MW-10, MW-11, MW-12, MW-13, MW-16S, MW-16D, MW-20, MW-21, MW-23S, MW-30, and MW-38. Thallium was in exceedance of its IMAC in monitoring wells MW-10 and MW-11. Vanadium was detected in exceedance of its IMAC in monitoring wells MW-12, MW-20, MW-21, and MW-38. Note that MW-21 is the current background well for both the C&D-over-MSW Landfill and the C&D Expansion Landfill. Wells MW-10, MW-11, MW-12, MW-13, and MW-16S are compliance wells for the C&D-over-MSW Landfill and wells MW-20, MW-30, and MW-35 are compliance wells for the C&D Expansion Landfill. Wells MW-38 is located between the two landfills and is both a performance well for the C&D-over-MSW Landfill and a compliance well for the C&D Expansion Landfill; however, the exceedances in MW-38 are considered to be from the C&D-over-MSW Landfill. A summary of the historical detections of cobalt, iron, manganese, thallium, and vanadium at all facility monitoring wells is presented in Table 1. Charts 1, 2, 3, 4, and 5 show the concentrations of these metals versus time. As the charts illustrate, the metals concentrations have shown a lot of Burke Co. Johns River Landfill, Permit #12-03 La Bella Associates Alternate Source Determination June 2020 variability with significant fluctuation over time. Even with the fluctuations, cobalt, iron, and manganese have been consistently high in a majority of the wells over time, especially in wells MW-11, MW-12, MW-10, MW-16S, and MW-38. Thallium and vanadium concentrations have been less consistent and less wide -spread. Thallium has had recent exceedances in MW-10 and MW-11 in 2019 and a few sporadic exceedances historically. Vanadium has had sporadic exceedances in several wells, including 2019 exceedances in MW-20, MW-21, MW-38, and MW-35. 3.0 STATISTICAL BACKGROUND CONCENTRATIONS 3.1 Background Data Selection MW-9 was the facility background well from 1994 until May 2005, when it was abandoned. MW 17 was the facility background well from May 1999 until June 2011. Both MW-9 and MW 17 were sampled between May 1998 and May 2005. MW-20 became the facility background well in December 2010. Both MW-17 and MW-20 were sampled between December 2010 and June 2011. With the opening of Phase 1A of the C&D Expansion in August 2014, MW-21(formerly PZ-1) became the facility background well and MW 20 became a compliance well for the C&D Expansion Landfill. MW-21 has been sampled as a facility background well from April 2014 to the present. In July 2017, the NCDEQ issued new Guidelines for Alternate Source Demonstration Submittals for Solid Waste Management Facilities (NCDEQ, 2017), which included new guidelines for establishing background values for constituents. The new guidelines require a minimum of ten background samples with low turbidity (< 10 Nephelometric Turbidity Units (NTU)) be used to establish background levels. We do not have turbidity data for the background well samples prior to November 2006, so data prior to that have been excluded. Table 2 presents the background well concentrations for the five metals under consideration from November 2006 to present, as well as the turbidity and pH for each sample. Note that the background data include some estimated values below the reporting limit. There are currently only eight background samples with turbidity below 10 NTU as required by the 2017 Guidelines, so we expanded our criteria to include any samples with turbidity less than 18 NTU. This gave us a set of 14 background samples to work with. The background data are summarized in Table 2, with the 14 selected samples highlighted in cyan. Table 2 also includes the calculated average, standard deviation, and average plus two standard deviations for each metal based on the 14 selected samples. 3.2 Statistical Methods 3.2.1 Normality To calculate normality for those metals with truncated values (non -detects - ND) in the data set, the values for all non -detect results were set to equal half of the method detection limit. Normality of the data sets for each of the five metals were then determined using the Shapiro-Wilks Test on the untransformed data. If the background data were found to be non -normal, the data would be transform using the natural logarithm function and the Shapiro-Wilks test would be applied to the log -transformed data. If a data set was found to be log -normal, further statistical analysis of that data set would be performed using the log -transformed data. If a data set was found to be neither normal nor log -normal, the normality tests may have been be re -applied after removal of any outliers. Burke Co. Johns River Landfill, Permit #12-03 La Bella Associates Alternate Source Determination June 2020 3.2.2 Potential Outliers Each data set was analyzed for potential outliers using Dixon's test using either the non -transformed or the log -transformed data (or both) based on the results of the normality tests. The data were tested for both high -value and low -value outliers. If any outliers were identified, the outliers were removed from the data set. 3.2.3 Over Tolerance Limits If a data set was found to be either normal or log -normal, Parametric Tolerance Interval Analysis was performed on those data to determine an Upper Tolerance Limit (UTL). If the analysis was performed on log -transformed data, the result would then be untransformed using the antilog (ex) function to get the UTL. The UTL would then be considered the statistical background value for that metal. 3.2.4 Treatment of Non -Normal Data If a data set was found to be neither normal nor log -normal, an alternate non -parametric method would be applied to determine the statistical background value. If there were two or more non - truncated values in the data set, the background was determined as the average plus two standard deviations of those data. If there were no non -truncated data (i.e., all background data were non - detect), the detection limit would be considered the background value. 3.3 Statistical Background Calculations The above methods were applied to the data sets for each of the five metals being considered. The statistical analysis worksheets are included in Appendix A. Following is a summary for each metal and all the results are summarized in Table 3. 3.3.1 Cobalt Background Calculation Cobalt background concentrations were found to neither normal nor log -normal, which was to be expected since greater than 50% of the data were truncated. There were no outliers identified in the cobalt data. The background value based on the average plus two standard deviations (see Table 2) for the cobalt data was 11.3 pg/L. 3.3.2 Iron Background Calculation The iron background data was initially found to be neither normal nor log -normal; however, three outliers were identified in the data set. After removing the outliers, the date set was found to be log- normal. The UTL for iron was calculated based on the log -transformed data at 14,182 pg/L. 3.3.3 Manganese Background Calculation The manganese background data was found to be log -normal and no outliers were identified in the data set. The UTL for manganese was calculated based on the log -transformed data at 535 pg/L. 3.3.4 Thallium Background Calculation The thallium background data was all truncated (non -detect); therefore, not statistical calculations were made. The background value is considered to be equal to the laboratory's method detection limit, which for thallium in the last few monitoring events has been 0.1 pg/L. Burke Co. Johns River Landfill, Permit #12-03 La Bella Associates Alternate Source Determination June 2020 4 3.3.5 Vanadium Background Calculation The vanadium background data was found to be log -normal and no outliers were identified in the data set. The UTL for vanadium was calculated based on the log -transformed data at 45.2 pg/L. 4.0 CONCLUSIONS AND RECOMMENDATIONS There were not sufficient background data with turbidity below 10 NTU to establish statistical background values for this facility; therefore, the turbidity range was expanded to accept data with turbidity up to 18 NTU. We proposed that the background values calculated based on these data be accepted as interim values. We anticipate that more low -turbidity background data will be acquired for the facility in the future. Once there is sufficient background data with turbidity below 10 NTU, the background values may be recalculated. We propose the following interim background values for the metals with recent GPS exceedances be established as the new GPS in accordance with 15A NCAS 13B.1634.g.5: CONSTITUENT CURRENT GPS PROPOSED BACKGROUND GPS Cobalt 1 pg/L (IMAC) 11.3 pg/L Iron 300 pg/L (NC2L) 14,182 pg/L Manganese 50 pg/L (NC2L) 535 pg/L Vanadium 0.3 pg.L (IMAC) 45.2 pg/L Since the calculated background for thallium (0.1 pg/L) is lower than the current GPS of 0.2 pg/L (IMAC), we propose no changes to the GPS for thallium. Even with the proposed background -based GPS, there are still several exceedances based on the November 2019 sampling event results. Cobalt was above the proposed background in wells MW-10, MW-11, MW-12, MW-13, and MW-16S. Iron was above the proposed background in wells MW 10, MW-11, MW-12, MW-16S, and MW-38. Manganese was above the proposed background in wells MW 10, MW-11, MW-12, MW-13, MW-16S, and MW-38. Thallium was in exceedance of the GPS in MW-10 and MW-11. Vanadium has not been detected above the proposed background - based GPS in any well in any recent sampling event. Note that all of the exceedances of the proposed GPS are in wells associated with the C&D-over- MSW Landfill. MW-38 is a compliance well for the C&D Expansion landfill; however, it is located between the two landfill units and is also considered a performance well for the C&D-over-MSW Landfill. We believe the metals exceedances in MW-38 are related to the old C&D-over-MSW Landfill. All constituents are below the GPS for all other wells associated with the C&D Expansion Landfill; therefore, we consider there to be no exceedances related to the C&D Expansion Landfill. As the C&D-over-MSW landfill is currently under a Corrective Action Plan (CAP), we propose that iron, manganese, thallium, and vanadium be added to the list of Constituents of Concern (COCs) for the CAP. (Cobalt is already on the COC list.) The current remedy under the CAP includes phytoremediation, which is a proven, effective remedy for metals in groundwater. The approved CAP Burke Co. Johns River Landfill, Permit #12-03 La Bella Associates Alternate Source Determination June 2020 remedies and all of the COCs, including the metals, will be evaluated in the next Corrective Action Evaluation Report (CAER), which is due in spring 2021. 5.0 REFERENCES Fetter 2001, Fetter Charles Willard, Applied Hydrogeology 41h Edition, Prentice -Hall, Inc. 2001 Gibbons, R.D. 1994. Statistical Methods for Groundwater Monitoring. John Wiley & Sons, Inc, New York. Section 14.2.1. Hinchee, R.E., A. Leeson, L. Semprini, and S.K. Ong. 1994. Bioremediation of Chlorinated and Polycvclic Aromatic Hydrocarbon Compounds. Lewis Publishers, Boca Raton. Interstate Technology and Regulatory Cooperation Work Group (ITRC). September 1999. Natural Attenuation of Chlorinated Solvents in Groundwater: Principles and Practices. Technical/Regulatory Guidelines. Joyce Engineering (JOYCE), 1994. Transition Plan, Johns River Waste Management Facility. April 1994. JOYCE, 2000. Water Quality Assessment Report, Johns River Waste Management Facility. January 2000. JOYCE, 2004. Update on Groundwater Assessment Activities, Johns River Waste Management Facility. October 2004. JOYCE, 2005a. Assessment of Corrective Measures Report, Johns River Waste Management Facility. February 2005. JOYCE, 2005b. Quantitative Risk Assessment, Johns River Waste Management Facility. February 2005. JOYCE, 2008. Corrective Action Plan, Johns River Waste Management Facility. June 2008. JOYCE, 2011a. Corrective Action Evaluation Report, Johns River Waste Management Facility. May 2011. JOYCE, 2011b. Alternate Source Demonstration - Iron and Manganese in Groundwater, Johns River Waste Management Facility. November 2011. JOYCE, 2013. Addendum to the Corrective Action Plan, Johns River Waste Management Facility. August 2013. JOYCE, 2016. Corrective Action Evaluation Report, Johns River Waste Management Facility. April 2016. JOYCE, 2017. Water Quality Monitoring Plan, Johns River Waste Management Facility. Revised January 2017. JOYCE, 2018. Addendum #2 to the Corrective Action Plan, Johns River Waste Management Facility. January 2018. Burke Co. Johns River Landfill, Permit #12-03 Alternate Source Determination La Bella Associates June 2020 N. National Research Council (NRC), 2000. Natural Attenuation for Groundwater Remediation. National Academy Press, Washington, D.C. pp. 108-111. North Carolina Department of Environment and Natural Resources, 1990-2011, Solid Waste Management Regulations - 15A NCAC 13B. NCDEQ, 2007. North Carolina Solid Waste Section Guidelines for Corrective Action at Solid Waste Management Facilities. March 2007. NCDEQ, 2017. NC Solid Waste Section Guidelines for Alternate Source Demonstration Submittals for Solid Waste Management Facilities. July 2017. NCDEQ 2018, NCDEQ Review Letter - February 2018 Water Quality Monitoring Report (dated 312812018), April 2, 2018. NCDEQ 2018. July 2018 Memorandum: Annual Detection Monitoring at Construction and Demolition Landfills. July 13, 2018. Sumsion, C.T., and Laney, R.L., 1967, Geology and Ground -water Resources of the Morganton area North Carolina. N.C. Department of Water Resources, Ground Water Bulletin No. 12, 119 p. U.S. Department of Energy (USDE). May 1999. Decision -Making Framework Guide for the Evaluation and Selection of Monitored Natural Attenuation Remedies at Department of Energy Sites. U.S. Environmental Protection Agency (USEPA). May 1996. Seminars on Bioremediation of Hazardous Waste Sites: Practical Approaches to Implementation. ORD,EPA/625/K-96/001. Chapters 15 (Natural Attenuation of Groundwater) and 17 (Natural Attenuation of Landfills). USEPA and U.S. Air Force (USAF). July 1993. Remediation Technologies Screening Matrix Reference Guide, Version I. Joint Project of OSWER and Environics Directorate, P1393-2118212. USEPA, 2009. Statistical Analysis of Groundwater Monitoring Data at RCRA Facilities - Unified Guidance. Office of Resource Conservation and Recovery Program Implementation and Information Division, U.S. Environmental Protection Agency. March 2009. Burke Co. Johns River Landfill, Permit #12-03 La Bella Associates Alternate Source Determination June 2020 Tables Table 1 Historical Detections of Selected Metals Table 2 Background Data Table 3Summary of Statistical Background Calculations TABLE 1: Historical Concentrations of Selected Metals Analyte Sample Date EPA Method DL RL MW-9 Background Wells MW-17 MW-20 * MW-21 MW-10 MW-11 C&D-Over-MSW Compliance Wells MW-12 MW-13 MW-16S MW-16D MW-22S MW-38 ** C&D Expansion Compliance Wells MW-23S MW-24S MW-30 MW-35 Blanks Cobalt 18-Jan-95 -- 10 35.0 NI NI NI 35.0 14.0 52.0 14.0 NI NI NI - -- NI NI ND 6-Feb-95 --- 10 16.0 NI NI NI 43.0 ND 66.0 ND NI NI -- NI - -- NI NI ND Mar-95 10 28.0 NI NI NI 57.0 ND 78.0 20.0 NI NI -- NI --- -- NI NI ND Aug-95 - 10 ND NI -- - 58.0 ND 30.0 32.0 NI NI -- NI - -- NI NI ND Jan-96 -- 10 17.0 NI - - 37.0 ND 23.0 ND NI NI -- NI - -- NI NI ND Feb-96 --- 10 37.0 NI - -- 41.0 ND 24.0 ND NI NI -- NI --- --- NI NI ND May-96 10 11.0 NI - --- 26.0 ND 24.0 ND NI NI -- NI --- - NI NI ND Oct-96 - 10 16.0 NI - --- 52.0 ND 16.0 ND NI Ni -- NI - - NI NI ND May-97 -- 6 33.0 NI - --- 120 5.0 J 32.0 6.0 NI NI -- NI -- - NI NI ND Nov-97 5 29.0 NI - --- 99.0 11.0 48.0 14.0 NI NI NI -- - NI NI ND May-98 1 28.0 NI - --- 120 8.0 76.0 32.0 NI NI NI -- - NI NI ND Nov-98 --- 1 10.0 NI - -- 140 6.0 47.0 1.0 NI Ni -- NI -- - NI Ni ND 11-May-99 - 5 20.0 26.0 - --- 48.0 13.0 34.0 17.0 59.0 ND NI - NI NI ND 18-Oct-99 --- 10 120 37.0 - -- 85.0 20.0 220 16.0 40.0 ND - NI - - NI NI ND 3-May-00 --- 10 ND ND -- - 54.0 ND 31.0 13.0 89.0 ND - NI - - NI NI ND 7-Nov-00 -- 10 ND 20.0 - --- 40.0 ND 18.0 ND 32.0 ND - NI - - NI NI ND 31-May-01 -- 10 ND ND -- --- 53.0 ND 30.0 11.0 32.0 ND - NI - - NI NI ND 7-Nov-01 --- 10 ND ND - --- 29.0 ND 23.0 ND 26.0 ND - NI - - NI NI ND 22-May-02 10 14.0 B 14.0 B - --- 68.0 16.0 B 51.0 B 17.0 B 39.0 B 12.0 B - NI - - NI NI 11.0 14-Nov-02 -- 10 ND ND - --- 90.0 ND 41.0 11.0 34.0 ND NI - - NI NI ND 14-May-03 -- 10 19.0 ND - -- 280 ND 46.0 53.0 24.0 ND NI - - NI NI ND 20-Nov-03 --- 10 26.0 10.0 J - -- 340 18.0 56.0 58.0 30.0 ND NI - -- NI NI ND 6-May-04 10 ND ND -- - 140 ND 46.0 47.0 29.0 ND -- NI -- - NI NI ND 10-Nov-04 --- 10 10.0 ND - -- 170 21.0 50.0 46.0 29.0 ND NI - - NI NI ND 5-May-05 - 10 12.0 ND - --- 130 16.0 46.0 60.0 26.0 ND NI -- - NI NI ND 3-Nov-05 --- 10 - ND - --- 66.0 15.0 42.0 45.0 25.0 ND NI - NI NI ND 25-May-06 --- 10 -- ND -- --- 80.3 21.7 42.7 43.2 24.9 ND NI -- - NI NI ND 2-Nov-06 -- 10 ND - - 131 30.8 37.0 28.3 26.6 ND NI - NI NI ND 30-May-07 - 10 -- 4.1 J - - 87.2 20.7 44.0 36.9 26.6 ND NI - NI NI ND GWPS = 70 pg/L (10/23/07) 29-Nov-07 10 -- 7.3 J -- - 67.2 55.5 47.9 J 23.4 30.7 ND -- NI -- - NI NI ND 29-May-08 0.60 10.0 -- 5.4 J -- - 71.9 54.6 34.8 35.3 ND ND -- NI -- - NI NI ND 6-Nov-08 0.60 10.0 -- 9.2 J -- --- 71.9 60.0 47.9 44.1 24.3 2.2 B -- NI -- - NI NI 1.6 J 3-Jun-09 0.60 10.0 -- 22.8 B -- - 139 78.6 53.5 49.3 54.7 7.6 B --- NI --- - NI NI 7.6 J Resample> 27-Aug-09 0.60 10.0 -- - - --- 60.0 -- - -- -- -- -- NI --- - NI NI --- 18-Nov-09 0.60 10.0 -- 14.9 -- --- 126 84.5 50.3 44.1 31.8 ND --- NI -- - NI NI ND 16-Jun-10 0.60 10.0 - 19.1 -- - 96.1 103 70.9 38.0 48.6 ND --- NI --- - NI NI ND Resample> 5-Aug-10 0.60 10.0 -- -- -- - - 85.5 - -- -- - --- NI --- - NI NI ND GWPS = 1 pg/L (10/1/10) 1-Dec-10 0.60 10.0 -- 9.8 J 22.1 - 72.7 151 111 43.1 33.3 ND - NI - - NI NI ND Resample> 13-Jan-11 0.60 10.0 -- - ND - -- 84.2 -- - --- NI --- - NI NI ND 1-Jun-11 0.60 10.0 -- 7.8 J 2.6 J - J 76.4 99.3 72.9 41.7 38.6 ND - -- - -- - - ND 20-Dec-11 5.0 10.0 -- -- ND - 92.8 75.6 62.7 36.5 25.5 ND - -- - -- - ND 30-May-12 5.0 10.0 -- - ND - 90.2 108 78.8 42.3 46.2 ND - -- - ND 5-Dec-12 5.0 10.0 -- - ND - 46.6 27.9 101 45.8 51.4 ND -- - ND 12-Jun-13 5.0 10.0 -- - ND - 243 150 118 92.2 66.0 ND -- - -- -- - ND 28-Oct-13 5.0 10.0 -- - ND - 200 128 124 117 75.7 ND -- - ND Resample> 10-Dec-13 5.0 10.0 -- - -- - -- 40.4 -- --- --- --- -- - ND Background> 10-Apr-14 EPA 6010 5.0 10.0 -- - - ND -- --- --- --- -- ND 80.8 - NI NI ND 6-May-14 EPA 6010 5.0 10.0 - -- ND ND 138 33.4 68.9 65.9 26.6 ND ND 58.0 - - NI NI ND Background > 20-Jun-14 EPA 6010 5.0 10.0 - - - ND --- --- --- --- - ND 12.5 - NI NI ND Background> 17-Jul-14 EPA 6010 5.0 10.0 -- - - ND -- - - ND 18.9 - NI NI ND 22-Oct-14 EPA 6010 5.0 10.0 - -- ND ND 126 37.1 82.0 74.9 32.1 ND ND 21.5 - NI NI ND 20-May-15 EPA 6010 2.5 10.0 - - 2.9 J ND 116 34.8 77.8 90.0 34.0 ND ND 10.5 - - NI NI ND 8-Dec-15 EPA 6010 2.5 10.0 - - ND ND 175 61.0 84.8 49.7 32.8 ND 11.2 4.1 J -- - NI NI ND Resample> 4-Feb-16 EPA 6010 2.5 10.0 -- - -- - - - - 3.2 J - NI NI ND 3-May-16 EPA 6010 2.5 10.0 -- - 3.1 J 4.0 J 132 52.6 69.7 85.0 27.6 ND ND 10.0 - - NI NI ND 13-Dec-16 EPA 6010 2.5 10.0 - - 3.6 J ND 93.2 52.4 70.6 58.8 28.1 ND ND ND - - NI NI ND 27-Jun-17 EPA 6010 2.5 10.0 - -- ND ND 121 60.5 74.0 75.5 35.4 ND ND ND - - NI NI ND 13-Dec-17 EPA 6010 2.5 10.0 - ND ND 73.9 54.4 66.5 93.6 31.1 ND 11.6 - - NI NI ND IMAC = 1 pg/L 16-May-18 EPA 6010 2.5 10.0 - ND ND 64.8 55.1 61.0 83.0 33.0 ND AB 15.7 -- -- 3.6 J ND ND 6-Dec-18 EPA 6010D 2.5 5.0 - - 5.1 ND 74.3 58.0 67.9 102.0 38.1 ND AB 17.5 3.1 J ND 3.7 J ND ND Resample> 7-Feb-19 EPA 6010D 2.5 5.0 -- - ND - -- - -- -- -- -- AB - -- - - - ND 8-May-19 EPA 6010D 2.5 5.0 - ND ND 64.0 48.6 57.5 92.7 36.8 ND AB 14.3 ND ND ND 3.7 J ND 8-Nov-19 EPA 6010D 1.1 5.0 -- - 2.2 J 2.8 J 53.8 52.0 70.1 66.0 32.8 ND AB 4.4 J 2.1 J - ND ND ND Burke Co. Johns River Landfill Permit # 12-03 Page 1 of 4 La Bella Associates TABLE 1: Historical Concentrations of Selected Metals Analyte Sample Date EPA Method DL RL Background Wells MW-9 MW-17 MW-20 MW-21 MW-10 MW-11 C&D-Over-MSW Compliance Wells MW-12 MW-13 MW-16S MW-16D MW-22S MW-38 ** C&D Expansion Compliance Wells MW-23S MW-24S MW-30 MW-35 Blanks Iron 1-Jun-11 14.0 300 308 11,000 - 20,500 29,200 16,300 886 22,200 413 --- --- --- --- --- --- ND Resample> 7-Jul-11 50.0 300 -- -- 7,150 - -- -- - -- - -- - -- -- -- -- -- ND NC 21 300 pg/L (01/01/10) 20-Dec-11 50.0 300 -- - 8,010 - 26,300 36,700 22,900 1,160 22,200 93.5 J - -- -- -- -- -- ND 30-May-12 50.0 300 --- --- 5,940 - 24,500 45,700 21,700 1,300 24,500 ND - --- --- --- --- --- ND 5-Dec-12 50.0 300 --- --- 2,970 - 7,010 8,730 28,200 393 21,700 159 J - -- --- --- --- --- ND 12-Jun-13 50.0 300 -- -- 2,460 - 55,300 55,300 34,800 4,650 26,700 522 - - - - - - 81.2 J 28-Oct-13 50.0 300 - - 883 - 28,700 49,700 29,800 1,730 24,300 ND - -- -- -- -- --- ND Background > 10-Apr-14 EPA 6010 50.0 300 --- - -- ND -- -- -- -- -- -- 559 22,800 NI NI NI NI ND 6-May-14 EPA 6010 50.0 300 -- - 4,240 177 J 47,300 46,800 29,700 1,200 24,600 ND 3,930 16,300 NI NI NI NI ND Background > 20-Jun-14 EPA 6010 50.0 300 -- - - 200 J -- -- -- - -- - 402 14,400 NI NI NI NI ND Background > 17-Jul-14 EPA 6010 50.0 300 -- - - 381 -- -- -- -- -- -- 2,280 4,390 NI NI NI NI ND 22-Oct-14 EPA 6010 50.0 300 -- --- 3,990 2,340 33,600 29,200 31,200 528 27,700 171 J 719 16,700 NI NI NI NI ND 20-May-15 EPA 6010 25.0 300 -- - 6,660 350 22,400 22,600 33,800 672 25,800 63.5 J 295 J 16,100 NI NI NI NI ND 8-Dec-15 EPA 6010 25.0 300 -- - 3,590 1,380 102,000 74,200 50,200 1,460 27,400 43.7 J 29,700 27,800 NI NI NI NI ND Resample> 4-Feb-16 EPA 6010 25.0 300 -- - -- -- -- -- -- -- -- -- 9,840 -- NI NI NI NI ND 3-May-16 EPA 6010 25.0 300 -- - 8,590 7,630 39,300 67,900 42,400 3,870 24,000 168 J 929 30,500 NI NI NI NI 27.3 J 13-Dec-16 EPA 6010 25.0 300 -- - 9,700 2,020 17,600 67,800 45,300 969 24,000 217 J 2,440 37,400 NI NI NI NI ND 27-Jun-17 EPA 6010 25.0 300 -- - 3,140 2,340 58,100 67,400 51,800 1,230 29,100 213 J 1,300 40,800 NI NI NI NI ND 13-Dec-17 EPA 6010 25.0 300 -- - 5,160 1,030 21,400 68,800 40,900 2,600 26,300 62.6 J - 14,500 NI NI NI NI ND 16-May-18 EPA 6010 25.0 300 -- - 1,920 295 J 18,900 62,200 43,600 1,030 31,800 402 AB 19,900 75.6 J 1570 3,140 110 J ND 6-Dec-18 EPA 6010D 25.0 50 --- - 13,600 141 43,300 72,100 43,000 1,740 35,300 84.2 AB 17,600 323 1550 5440 3410 167 Resample> 7-Feb-19 EPA 6010D 25.0 50 -- - 3,290 -- -- -- -- -- -- -- AB -- -- -- -- 532 ND 8-May-19 EPA 6010D 25.0 50 -- - 2,900 2,550 26,400 61,600 37,200 2,320 29,400 47.8 J AB 18300 856 1310 1770 7820 ND 8-Nov-19 EPA 6010D 19.5 50 5,530 4,320 20,100 72,800 44,400 1,830 28,400 20.2 J AB 41800 480 - 883 2460 155 Manganese 1-Jun-11 0.30 50.0 - 385 209 -- 5,770 14,500 9,330 1,160 8,460 123 - -- -- - -- -- 0.36J Resample> 7-Jul-11 5.0 50.0 - -- 143 - -- -- -- --- --- --- --- --- --- --- --- --- ND NC 21 50 pg/L (01/01/10) 20-Dec-11 5.0 50.0 -- - 136 - 6,670 15,500 D 9,480 1,030 8,540 119 - -- - -- - -- ND 30-May-12 5.0 50.0 -- - 104 - 6,700 14,300 9,370 1,170 8,790 119 - - - - - ND 5-Dec-12 5.0 50.0 -- - 54.5 - 2,650 8,930 9,150 1,230 9,180 122 - - - - - - ND 12-Jun-13 5.0 50.0 -- - 49.3 J - 16,800 15,400 11,700 2,060 8,150 130 - -- - -- - - ND 28-Oct-13 5.0 50.0 -- - 80.0 - 8,420 15,000 9,910 2,500 9,680 124 -- -- - -- - ND Background > 10-Apr-14 EPA 6010 5.0 50.0 -- - -- 20.8 J -- -- -- -- --- --- 132 5,450 NI NI NI NI ND 6-May-14 EPA 6010 5.0 50.0 -- - 83.5 22.5 J 12,300 18,300 9,950 1,600 9,720 119 77.5 4,830 NI NI NI NI ND Background > 20-Jun-14 EPA 6010 5.0 50.0 -- - -- 24.7 J -- -- -- -- -- -- 52.2 3,790 NI NI NI NI ND Background > 17-Jul-14 EPA 6010 5.0 50.0 -- - -- 27.9 J -- -- -- -- -- -- 39.8 J 3,380 NI NI NI NI ND 22-Oct-14 EPA 6010 5.0 50.0 -- --- 77.5 73.6 9,400 23,200 11,000 1,740 11,500 115 16.6 J 3,930 NI NI NI NI ND 20-May-15 EPA 6010 2.5 50.0 -- - 146 27.4 J 9,070 29,800 10,800 2,010 12,400 121 11.7 J 3,060 NI NI NI NI ND 8-Dec-15 EPA 6010 2.5 50.0 -- - 68.5 50.0 J 15,000 18,100 10,800 1,500 8,440 124 462 3,220 NI NI NI NI ND Resample> 4-Feb-16 EPA 6010 2.5 50.0 -- - -- -- -- -- -- -- -- -- 124 -- NI NI NI NI ND 3-May-16 EPA 6010 2.5 50.0 -- - 148 142 7,850 17,500 9,140 1,810 6,600 119 14.3 J 4,170 NI NI NI NI ND 13-Dec-16 EPA 6010 2.5 50.0 -- - 169 48.1 J 5,100 17,900 8,850 1,560 10,900 122 33.0 J 3,380 NI NI NI NI ND 27-Jun-17 EPA 6010 2.5 50.0 -- - 65.5 60.3 8,910 19,900 10,200 1,750 11,000 131 24.9 J 3,700 NI NI NI NI ND 13-Dec-17 EPA 6010 2.5 50.0 -- - 99.3 40.8 J 5,200 18,600 9,960 2,260 9,940 105 11.5 J 3,720 NI NI NI NI ND 16-May-18 EPA 6010 2.5 50.0 -- - 35.3 J 25.8 J 4,780 19,400 9,940 2,090 9,090 123 AB 4,260 17 J 29.5 J 762 ND ND 6-Dec-18 EPA 6010D 2.5 5.0 - - 235 23.6 5,310 17,700 9,750 2,440 9,730 123 AB 4,870 73.7 29.5 477 41.2 10.0 Resample> 7-Feb-19 EPA 6010D 2.5 5.0 -- - 61.6 -- -- -- -- -- -- -- AB -- -- -- -- ND 8-May-19 EPA 6010D 2.5 5.0 -- - 68.6 73.7 4,070 17,200 9,210 2,170 11,900 112 AB 4590 52.4 25.5 280 105 ND 8-Nov-19 EPA 6010D 0.9 5.0 --- - 106 126 3,540 15,200 10,900 1,770 9,540 124 AB 4260 54.2 -- 334 31 6.8 Burke Co. Johns River Landfill Permit # 12-03 Page 2 of 4 LaBella Associates TABLE 1: Historical Concentrations of Selected Metals Analyte amp Date EPA Method DL RL MW-9 Background Wells MW-17 MW-20* MW-21 MW-10 MW-11 C&D-Over-MSW Compliance Wells MW-12 MW-13 MW-16S MW-16D MW-22S MW-38** C&D Expansion Compliance Wells MW-23S MW-24S MW-30 MW-35 Blanks Thallium 1-Nov-97 --- 1 2.0 B NI 2.0 B 2.0 B 3.0 B 1.0 B NI NI NI - -- NI NI 2.0 1-May-98 -- 1 ND NI -- ND ND ND 1.0 NI NI --- NI - -- NI NI ND 1-Nov-98 ... 1 ND NI - -- ND ND ND 1.0 NI NI -- NI - -- NI NI ND 11-May-99 --- 2 2.0 3.0 - -- 4.0 3.0 4.0 ND 3 2.0 NI - - NI NI ND 18-Oct-99 --- 10 ND ND - -- ND ND ND ND ND ND --- NI -- - NI NI ND 3-May-00 -- 10 ND ND - -- ND ND ND ND ND ND --- NI -- - NI NI ND 7-Nov-00 -- 10 ND ND - -- ND ND ND ND ND ND --- NI --- - NI NI ND 31-May-01 --- 10 ND ND - -- ND ND ND ND ND ND --- NI --- - NI NI ND 7-Nov-01 --- 10 ND ND - -- ND ND ND ND ND ND --- NI - - NI NI ND 22-May-02 -- 10 ND ND - --- ND ND ND ND ND ND - NI - - NI NI ND 14-Nov-02 -- 10 ND ND - -- ND ND ND ND ND ND - NI - - NI NI ND 14-May-03 --- 10 ND ND - --- ND ND ND ND ND ND - NI - - NI NI ND 20-Nov-03 --- 10 ND ND - -- ND ND ND ND ND ND - NI - - NI NI ND 6-May-04 -- 10 ND ND - -- ND ND ND ND ND ND - NI - - NI NI ND 10-Nov-04 -- 10 ND ND - -- ND ND ND ND ND ND --- NI - - NI NI ND 5-May-05 10 16.0 ND - --- 41.0 23.0 25.0 14.0 26.0 ND - NI - - NI NI ND 3-Nov-05 --- 10 -- ND - --- 19.0 17.0 15.0 ND 13.0 ND - NI - - NI NI ND 25-May-06 --- 10 ND - -- ND ND ND ND ND ND - NI - - NI NI ND 2-Nov-06 -- 10 - ND - -- ND ND ND ND ND ND - NI -- - NI NI ND 30-May-07 --- 5.5 -- ND - - 0.169 J 0.29 J 0.221 J 0.131 J 0.078 J ND NI -- - NI NI ND GWPS = 0.28 pg/L (10/23/07) 29-Nov-07 --- 5.5 - 0.042 J - -- 0.118 J 0.321 J 0.199 J 0.150 J 0.065 J ND NI -- NI NI ND 29-May-08 3.0 5.5 - ND - -- ND ND ND ND ND ND --- NI -- - NI NI ND 6-Nov-08 3.0 5.5 -- ND -- - 8.9 ND ND ND ND ND - NI -- - NI NI ND 3-Jun-09 3.0 5.5 - ND - -- ND ND ND ND ND 14.8 NI - NI NI ND 18-Nov-09 3.0 5.5 - ND - -- ND ND ND ND ND ND --- NI --- - NI NI 4.2 J 16-Jun-10 3.0 5.5 - ND -- - 5.3 J 7.7 4.1 J ND 4.0 J ND --- NI -- - NI NI ND Resample> 5-Aug-10 3.0 5.5 -- -- -- - -- 20.4 -- - -- - --- NI --- - NI NI 3.2 J 1-Dec-10 3.0 5.5 - 3.3 B ND --- 3.3 B 9.1 B 5.1 B ND 7.8 B ND -- NI -- - NI NI 3.1 J 1-Jun-11 3.0 5.5 - ND ND --- ND ND ND ND ND ND - -- - - - - ND 20-Dec-11 5.4 5.5 - - ND -- ND ND ND ND ND ND - -- - - - ND 30-May-12 5.4 5.5 - -- ND -- ND ND ND ND ND ND - -- - - ND 5-Dec-12 5.4 5.5 - - ND -- ND ND ND ND ND ND - -- - - - 6.8 12-Jun-13 5.4 5.5 - -- ND -- ND ND ND ND ND ND - -- - - ND 28-Oct-13 5.4 5.5 - -- ND -- ND ND ND ND ND ND - -- - - - ND Background > 10-Apr-14 EPA 6010 5.4 5.5 -- - -- ND --- - - - - -- - -- - -- - -- 6-May-14 EPA 6010 5.4 5.5 - -- ND ND ND ND ND ND ND ND - -- - - - ND Background > 20-Jun-14 EPA 6010 5.4 5.5 -- - -- ND -- - - - - -- - -- - -- - - Background > 17-Jul-14 EPA 6010 5.4 5.5 - - -- ND -- - - - - -- - -- - -- - - 23-Oct-14 EPA 6010 5.4 5.5 - -- - ND ND ND ND ND ND ND --- --- --- - -- - ND 20-May-15 EPA 6010 5.0 5.5 -- - - ND ND 6.4 ND ND ND ND - -- - ND 8-Dec-15 EPA 6010 5.0 5.5 - - ND ND ND ND ND ND ND ND ND ND J --- --- --- - ND Resample> 4-Feb-16 EPA 6010 2.5 5.0 - - -- - -- - - - - - 9.1 -- -- -- - -- ND 3-May-16 EPA 6010 5.0 5.5 - - ND ND ND ND ND ND ND ND ND ND -- - ND 13-Dec-16 EPA 6010 5.0 5.5 - -- ND ND 5.3 J 5.1 J ND ND ND ND ND ND --- --- --- - ND 27-Jun-17 EPA 6020B 0.020 5.5 -- - 0.077 J ND 0.24 J 0.36 J 0.094 J 0.097 J ND ND 0.057 J ND --- - -- - ND 13-Dec-17 EPA 6020B 0.028 5.5 -- - 0.15 J ND 0.73 J 0.60 J 0.03 J 0.18 J ND ND 0.051 J ND -- -- -- -- ND IMAC = 0.2 pg/L 16-May-18 EPA 6020 0.500 5.5 - - ND ND ND ND ND ND ND ND AB ND ND ND ND ND ND 6-Dec-18 EPA 6020B 0.060 0.1 -- - 0.26 ND 0.53 0.47 ND 0.15 ND ND AB ND ND 0.081 J 0.13 0.062 J ND Resample> 7-Feb-19 EPA 6020E 0.060 0.1 -- - -- - 0.11 0.40 - -- - - AB -- - -- --- --- ND 8-May-19 EPA 6020B 0.060 0.1 -- - 0.12 ND 0.70 0.48 ND 0.14 ND ND AB ND ND 0.073 J ND 0.15 ND 8-Nov-19 EPA 6020E 0.060 0.1 -- - 0.15 ND 1.50 0.49 0.069 J 0.14 ND ND AB 0.12 ND -- ND ND ND Burke Co. Johns River Landfill Permit # 12-03 Page 3 of 4 La Bella Associates TABLE 1: Historical Concentrations of Selected Metals Analyte Sample Date EPA Method DL RL MW-9 Background Wells MW-17 MW-20 * MW-21 MW-10 MW-11 C&D-Over-MSW Compliance Wells MW-12 MW-13 MW-16S MW-16D MW-22S MW-38 ** C&D Expansion Compliance Wells MW-23S MW-24S MW-30 MW-35 Blanks Vanadium 1-May-97 --- 5 12.0 NI -- 5.0 NO 66.0 9.0 NI NI -- NI - -- NI NI ND 1-Nov-97 -- 40 NO NI -- NO NO 180 ND NI NI -- NI - -- NI NI ND 1-May-98 -- 5 14.0 NI 6.0 7.0 159 22.0 NI NI -- NI - - NI NI ND 1-Nov-98 --- 5 15.0 NI - --- 12.0 8.0 110 14.0 NI NI -- NI - - NI NI ND 11-May-99 --- 5 55.0 58.0 - --- 25.0 16.0 72.0 31.0 71.0 100 - NI - NI NI ND 18-Oct-99 -- 40 630 150 - - 150 79.0 690 62.0 ND NO -- NI -- -- NI NI NO 3-May-00 - 40 ND ND - --- ND ND ND ND 140 ND --- NI --- -- NI NI NO 7-Nov-00 --- 40 ND 66.0 - -- ND ND ND NO NO ND --- NI -- - NI NI NO 31-May-01 --- 40 NO ND - --- ND ND ND ND ND NO --- NI --- - NI NI ND 7-Nov-01 -- 40 NO ND - -- ND NO NO NO ND NO --- NI --- - NI NI ND 22-May-02 -- 40 ND ND - -- ND NO ND ND ND ND --- NI --- - NI NI ND 14-Nov-02 --- 40 ND ND - -- ND NO ND ND ND ND --- NI --- - NI NI ND 14-May-03 --- 40 ND ND - -- ND NO ND ND ND NO --- NI - - NI NI ND 20-Nov-03 -- 40 ND ND - -- ND NO NO NO ND NO --- NI - - NI NI ND 6-May-04 - 40 ND ND - -- ND ND ND ND ND NO --- NI - - NI NI ND 10-Nov-04 - 40 ND ND - -- ND NO ND ND ND NO --- NI --- - NI NI ND 5-May-05 - 40 NO ND - -- ND ND ND ND ND ND --- NI --- - NI NI ND 3-Nov-05 - 40 - NO - -- ND ND NO NO NO NO --- NI --- - NI NI NO 25-May-06 - 40 - ND - -- ND ND ND ND ND ND --- NI --- - NI NI ND 2-Nov-06 - 40 - ND - -- ND ND NO ND ND ND --- NI --- - NI NI NO 30-May-07 --- 25 - ND - -- ND NO ND ND ND NO --- NI --- - NI NI 1.3 J GWPS = 3.5 pg/L (10/23/07) 29-Nov-07 -- 25 - 7.3 J -- - ND ND ND ND ND NO -- NI -- - NI NI NO 29-May-08 0.2 25.0 - 0.43 J - -- ND 2.4 J 1.3 J 3.7 J ND ND -- NI -- - NI NI NO 6-Nov-08 0.2 25.0 - 3.0 B - -- 2.2 B 0.53 B 5.5 B 11.1 J 6.2 B 1.4 B - NI - - NI NI 2.1 J 3-Jun-09 0.2 25.0 - 0.94 B - -- 0.47 B 0.91 B 0.66 B 5.2 J 1.8 B 2.7 B - NI - - NI NI 1.0 J 18-Nov-09 0.20 25.0 - 0.82 B - -- 0.43 B 0.66 B 4.1 J 5.4 J 1.3 B 0.29 B - NI - - NI NI 0.56 J 16-Jun-10 0.20 25.0 -- 1.1 B -- - 4.5 B 28.5 8.3 J 2.0 B 1.3 B 0.66 B - NI - - NI NI 0.98 J Resample> 5-Aug-10 0.20 25.0 -- - - - 1.5 B - - -- - -- NI - - NI NI 0.62 J GWPS = 0.3 pg/L (10/1/10) 1-Dec-10 0.20 25.0 -- 0.48 J 55.2 - 3.2 J 0.63 J 5.7 J 0.33 J 2.9 J 2.4 J -- NI -- - NI NI ND Resample> 13-Jan-11 0.20 25.0 -- - 0.55 B -- - -- -- -- -- - -- NI -- - NI NI 0.33 J 1-Jun-11 0.20 25.0 -- 0.69 J 17.2 J - 0.34 J 1.5 J 0.32 J 0.37 J ND 5.5 J - - - - - - ND 20-Dec-11 5.0 25.0 - 10.7 J -- ND ND ND ND ND NO - - - - -- - ND 30-May-12 5.0 25.0 - -- 9.2 J -- ND ND ND ND 7.9 J ND - - - - -- - NO 5-Dec-12 5.0 25.0 - - ND -- ND ND 6.1 J ND ND NO - -- - - - - NO 12-Jun-13 5.0 25.0 - -- ND -- ND ND ND 5.6 J ND NO - - - -- - ND 28-Oct-13 5.0 25.0 - -- ND -- ND 8.3 J ND ND ND NO --- --- - - -- - ND Background> 10-Apr-14 EPA 6010 5.0 25.0 - -- - NO - - - - - -- NO ND NI NI NI NI ND 6-May-14 EPA 6010 5.0 25.0 -- - 6.7 J ND ND ND ND ND ND ND 7.3 J ND NI NI NI NI NO Background> 20-Jun-14 EPA 6010 5.0 25.0 - -- - ND - - - - - -- NO ND NI NI NI NI ND Background> 17-Jul-14 EPA 6010 5.0 25.0 - -- - ND - - - - - -- ND ND NI NI NI NI NO 22-Oct-14 EPA 6010 5.0 25.0 -- - 6.5 J 9.6 J NO ND ND ND ND NO ND ND NI NI NI NI NO 20-May-15 EPA 6010 2.5 25.0 - -- 11.6 ND 9.1 J 20.1 J 10.7 J 2.6 J 11.3 J ND NO 4 J NI NI NI NI NO 8-Dec-15 EPA 6010 2.5 25.0 -- - 6.9 J 6.6 J 20.4 J 23.5 J 36.9 3.0 J 11.5 J NO 44.8 8.5 J NI NI NI NI ND Lab Re -run analyses> 8-Dec-15 EPA 6010 2.5 25.0 -- - -- - -- - 19.8 J - - -- - - -- - -- - Resample> 4-Feb-16 EPA 6010 2.5 50.0 -- - - -- - -- -- -- -- --- 16.0 J --- NI NI NI NI ND 3-May-16 EPA 6010 2.5 25.0 -- - 14.5 J 29.7 ND ND ND 5.7 J ND NO ND ND NI NI NI NI ND 13-Dec-16 EPA 6010 2.5 25.0 - -- 13.9 J 6.8 J ND ND ND ND ND ND 3.30 J ND NI NI NI NI NO 27-Jun-17 EPA 6010 2.5 25.0 - - 5.1 J 9.4 J 10.6 J 20.6 J 15.8 J ND 12.5 J NO ND 2.8 J NI NI NI NI NO 13-Dec-17 EPA 6010 2.5 25.0 --- - 8.4 J 4.2 J NO 4.5 J 3.5 J 3.4 J ND ND ND NO NI NI NI NI ND IMAC = 0.3 pg/L 16-May-18 EPA 6010 2.5 25.0 --- - 3.2 J ND ND 5.5 J ND ND NO ND AB ND ND ND 4.7 J ND NO 6-Dec-18 EPA 6010D 2.5 5.0 -- - 20.7 ND NO ND ND ND NO ND AB ND ND ND 6.6 6.2 NO Resample> 7-Feb-19 EPA 6010D 2.5 5.0 -- - 5.1 - -- - - - --- --- AB - - ND ND ND 8-May-19 EPA 6010D 2.5 5.0 -- - 4.2 J 10.4 NO ND ND 3.1 J ND ND AB NO ND NO ND 13.6 NO Resample> 24-Jul-19 EPA 6010D 2.5 5.0 -- - -- - -- - - - - -- AB - - - 6.4 - 8-Nov-19 EPA 6010D 1.3 5.0 -- 8.9 17.5 ND 2.9 J 6.8 ND 3.3 J NO AB 14.6 NO - ND 4.3 J NO Notes: All concentrations in micrograms per liter (pg/L) = parts per billion. - = Not sampled for this parameter or data not available. DL = Laboratory Detection Limit. RL = Reporting Limit (Lab. Reporting Limit for September 1994 - May 1999; NC PQL for October 1999 - December 2006; and SWSL for December 2006 - present). J = Estimated value - concentration is less than the RL but greater than the DL. B = Blank -Qualified (Similar concentrations detected in equipment, field, trip, or method blanks). ND = Not Detected at or above the RL (prior to Dec. 2006) or the DL (after Dec. 2006). *MW-20 was formerly a background well for the C&D-over-MSW landfill, but is now a compliance well fro the C&D Expansion landfill. NC 2L = Groundwater Standard from 15A NCAC 2L.0202. GWPS = Groundwater Protection Standard set by NC-DENR-SWS for constituents with no listed NC 2L standard - No longer used. IMAC = NC Interim Maximum Allowable Concentration -for constituents with no listed NC 2L standard NE = No NC 2L, GWPS, or IMAC established. NI = Monitoring well was not yet installed. AB = Monitoring well abandoned. Values above the NC2L Standard, GWPS, or IMAC are bold. **MW-38 is also a performance well for the C&D-over-MSW landfill. Burke Co. Johns River Landfill Permit # 12-03 Page 4 of 4 La Bella Associates TABLE 2: Available Background Data Background Ph Turbidity Cobalt Iron Manganese Thallium Vanadium Date Well (SU) (NTU) (pg/L) (pg/L) (pg/L) (pg/L) (pg/L) 11/2/2006 5.34 10.4 ND NA NA ND ND 6/3/2009 5.79 154 22.8 NA NA ND 0.94 B 11/18/2009 6.03 318 14.9 NA NA ND 0.82 B MW-17 6/16/2010 6.23 44.8 19.1 NA NA ND 1.1 B 12/1/2010 5.40 20.2 9.8 J NA NA 3.3 0.48 J 6/1/2011 5.83 7.58 7.8 J 308 385 ND 0.69 J 12/20/2011 6.12 80.4 ND 8,010 136 ND 10.7 J 5/30/2012 6.61 14.0 ND 5,940 104 ND 9.2 J 12/5/2012 5.41 631 ND 2,970 54.5 ND ND MW-20 6/12/2013 5.92 21.3 ND 2,460 49.3 J ND ND 10/28/2013 6.89 7.39 ND 883 80.0 N D ND 5/6/2014 5.37 37.1 ND 4,240 83.5 ND 6.7 J 4/10/2014 6.60 7.50 ND ND 20.8 J ND ND 5/6/2014 6.01 7.98 ND 177 J 22.5 J ND ND 6/20/2014 5.63 31.50 ND 200 J 24.7 J ND ND 7/17/2014 4.21 >1000? ND 381 27.9 J ND ND 10/22/2014 5.52 8.15 ND 2,340 73.6 ND 9.6 J 5/20/2015 5.29 8.15 ND 350 27.4 ND ND 12/8/2015 5.13 25.5 ND 1,380 50.0 J ND 6.6 J MW-21 5/3/2016 4.83 17.55 4.0 J 7,630 142 ND 29.7 12/13/2016 5.17 12.63 ND 2,020 48.1 J ND 6.8 J 6/27/2017 6.45 12.20 ND 2,340 60.3 ND 9.4 J 12/13/2017 7.26 15.01 ND 1,030 40.8 J ND 4.2 J 5/16/2018 6.60 5.89 ND 295 J 25.8 J ND ND 12/6/2018 5.41 5.40 ND 141 23.6 ND ND 5/8/2019 6.37 24.90 ND 2,550 73.7 ND 10.4 11/8/2019 4.80 50.5 2.8 J 4,320 126 ND 17.5 Average (Low Turb.): 5.9 1,955 81.1 9.9 Standard Deviation (Low Turb): 2.7 2,429 98.4 9.3 Avg + 2xStDev (Low Turb): 11.3 6,812 278 28.6 NOTES: SU = Standard Units NTU = Nephelometric Turbidity Units pg/L = micrograms per liter Burke Co. -Johns River Landfill Permit # 12-03 NA = Not analyzed for this parameter. ND = Not detected above the Method Detection Limit J = Estimated concentration below the Method Reporting Limit Cyan shadded samples selected for low turbidity (<18 NTU) LaBella Associates TABLE 3: Summary of Statistical Backgrounds Constituent Normality Outliers Method Background Units Non -Normal, Mean + Cobalt None 11.3 pg/L Non -Log -Normal 2 Std. Dev. Log -Normal after 3 outliers Iron Log UTL 14,182 pg/L outliers removed removed Manganese Log -Normal None UTL 535 pg/L Thallium All ND N/A Detection Limit 0.1 pg/L Vanadium Log -Normal None UTL 45.2 pg/L UTL = Upper Tolerance Limit ND = not detected. pg/L = micrograms per liter Burke Co., Johns River Landfill Permit # 12-03 LaBella Associates Charts Chart 1 Chart 2 Chart 3 Chart 4 Chart 5 Cobalt Concentrations vs. Time Iron Concentrations vs. Time Manganese Concentrations vs. Time Thallium Concentrations vs. Time Vanadium Concentrations vs. Time CHART 1: Cobalt Concentrations vs. Time Burke Co., Johns River Landfill Permit # 12-03 La Bella Associates CHART 2: Iron Concentrations vs. Time Burke Co., Johns River Landfill Permit # 12-03 La Bella Associates 30000 NC2L = 50 pg/L Proposed Background = 538 pg/L 25000 20000 a5000 10000 5000 CHART 3: Manganese Concentrations vs. Time 1 • 0 Dec-10 Jun-11 Dec-11 Jun-12 Dec-12 Jun-13 Dec-13 Jun-14 Dec-14 Jun-15 Dec-15 Jun-16 Dec-16 Jun-17 Dec-17 Jun-18 Dec-18 Jun-19 Dec-19 tMW-9 tMW-17 tMW-20 tMW-21 tMW-10 BMW-11 tMW-12 tMW-13 tMW-165 tMW-16D tMW-225 tMW-38 BMW-235 BMW-245 tMW-30 tMW-35 -NC2L -BKGD Burke Co., Johns River Landfill Permit # 12-03 LaBella Associates CHART 4: Thallium Concentrations vs. Time 45 40 35 30 25 20 u 15 10 0 Cb 9y 0 06 0 01 61 00 a0 c° a°' 50 AO p'Y ('Y Ati <' A'' (95 0 0 0 0 0 0 0 Al 50 01 d, & 10 10 ':1 ':1 ti'1' 1q 1' 1b 1b 1h 1h NII 10 NA 11 N$ 10 ,y0 10 off' oe �'° oe �'c oe �'° ill ill�'° ill�'° ill oe �'° ill�'° ill ill ill�'° oe �'° ill ill�'° ill off' �'° off' �'° le,�'° ID-1 �'° oe �'° oe N'° BMW-9 tMW-17 tMW-20 tMW-21 tMW-10 BMW-11 tMW-12 tMW-13 tMW-16S tMW-16D tMW-22S tMW-38 tMW-235 tMW-24S tMW-30 tMW-35 -IMAC Burke Co., Johns River Landfill Permit # 12-03 LaBella Associates CHART 5: Vanadium Concentrations vs. Time Burke Co., Johns River Landfill Permit # 12-03 LaBella Associates Figure Figure 1 Site Location Map t�# rl t Is .......... --- --- Pcp 120 APPROXIMATE LOCATION Q OF PROPERTY LINE if ti� Nq Lunn ol 1101 FOOO SOURCE: U.S.G.S. TOPOGRAPHIC MAP FOR MORGANTON NORTH, N.C. N G. 0 1000 2000 000 ISSUED FOR: LaBeLLa GROUNDWATER MONITORING REPORT Powered by partnership. DRAWING NAME: DRAWN BY: DATE: � PROJECT NO.: SITE LOCATION MAP RWH 02/27/19 2192621 2211 WEST VEADOWVIEW ROAD GREENSBORO, N.C. 27407 PHONE: (336) 323-0092 PROJECT NAME: DRAWING NUMBER: JOHNS RIVER LANDFILL Figure 1 labellapc.com @ 2020 LaBelle Associates BURKE COUNTY, NORTH CAROLINA I I N:\D.9.\D,..1.9.-C.—nt\BURKE:\GW EVENT MAPS, JOHNS RIVER SITE LOCATION MAP 2020.d.g Drawing Drawing 1 Groundwater Potentiometric Surface Map (November 2019) �o \ LaBeLLa Powered b partnership. 2211 W. MEADOWVIEW ROAD GREENSBORO, NC 27407 \\ \ \ P TECTED REA \ � \ PHONE: (336) 323-0092 labellapc.com LEGEND IF� ��\ �� _— \\\ \ ✓ )\� (\ EXIS ING T L —\ 1050 EXISTING 25 TOPOGRAPHIC CONTOUR 1080 EXISTING 10' TOPOGRAPHIC CONTOUR EXISTING 5' TOPOGRAPHIC CONTOUR EXISTING 2' TOPOGRAPHIC CONTOUR N\, GROUNDWATER SURFACE CONTOUR [FEET � 020 ABOVE MEAN SEA LEVEL (AMSL)] \ TRANSFER FACILITY PROPERTY LINE GROUNDWATER FLOW PATHWAY USED TO CALCULATE HYDRAULIC GRADIENT CURRENT BACKGROUND W LL EXISTING ROAD APPROXIMATE LIMITS OF WASTE WETLAND CENTERLINE OF STREAM MW-13 COMPLIANCE WELL LOCATION AND IDENTIFICATION WITH STATIC � \ ELEV. WATER LEVEL ELEVATION (FEET AMSL) - MW 18 SENTINEL WELL LOCATION AND IDENTIFICATION WITH STATIC WATER LEVEL ELEVATION (FEET AMSL) IV % T PH E 1A LIMIT \ \ \\ \\\ \\ / / I —` \ �\ \\\\\ \ O MW-9 ABANDONED OR UNUSED MONITORING WELL MULCMNG\ AND '0bo \ 1 \ \ AREA � l� � J I � � \� \ \� \� \ \\ � ( � \ \I \ \� � \ � PZ-9D PIEZOMETER LOCATION AND IDENTIFICATION o O 2019 LaBella Associates LIN �— ��s' -- / T — ��o \ I 1 1\\ =- A 1 1 I 1080% ) ��J I I \ \\\ �� ` GMP-3 GAS PROBE LOCATION AND IDENTIFICATION JOHNS RIVER WASTE 1�� i ARE \ ° � � / \ Q0 Il I ��r'� l i1 ��/ • \ �\ , 080 / / ` SMP-5 SURFACE MONITORING POINT LOCATION AND IDENTIFICATION 0 T1 TEMPORARY WELL MANAGEMENT FACILITY BURKE COUNTY, NORTH CAROLINA "0° / os / ° m I �� / \v/ MW 7 �� / /�'/// /� \\-• J �` P4-3/ / \\ \ '°� ;— � /f �/ �� / I//) (NM) NOT MEASURED -^--O APPROXIMATE LOCATION OF SPRING HEAD 1048. / 7- III0 a / / I _ +mo / I \� ° � / / I I �L 'ram 1 J � \� � �\ \� � r�� / / 0 11( \\� 1 - ABA Z�3 / �I l \\ '\ �\ 1 / / l� �� / / / Pz- o JE-0020 CONTROL POINT LOCATION AND IDENTIFICATION Z SEGMENT USED FOR GRADIENT CALCULATION W-8 / \\ / _ \ \ Txl 1 �/ _23D FLOW PATH LENGTH - 3S �� 1 1 / ( 103 �\1 0.33� l l l ( J/ I I � . \ i � �,° 1,971 LF �\ 02 ,� / PZ�� \ ' ,� �/ � � 1 \\\ \\ I I \ \\\ \\ \� __ l��f('li Z 1,471 LF Z 1,331 LF 'I— �° �_� / �1 I 2 11 \ o m �D \ 7l1 \\ >> 0,9110 1,521 LF I 1 \\ LOS C D \\\ \ \ I I I P 0 0 APPRO LIMIT O NOTES \ XISTI G WA I( 111 I _ 1. TOPOGRAPHIC CONTOUR INTERVAL 2 AND 10 FEET. 2. GROUNDWATER SURFACE CONTOUR INTERVAL = 10 FEET. S /� ` / 1\ \ ` —�� / \ \ \\ \ \ \\\ 11 3. STATIC WATER LEVELS WERE MEASURED ON NOVEMBER 6, 2019. 4. GROUNDWATER CONTOURS BASED ON LINEAR INTERPOLATION BETWEEN AND EXTRAPOLATION FROM KNOWN DATA TOPOGRAPHIC CONTOURS AND KNOWN / / � ° z_ ��- �,6° I I I \ ° \ �— // /�/�� / / / FIELD CONDITIONS. 5. MW-16D GROUNDWATER ELEVATION WAS NOT USED IN CALCULATING GROUNDWATER CONTOURS. NO: DATE: DESCRIPTION: OOP / / v / / Revisions PROJECT NUMBER: 2181871 o II11_RH DRAWN BY: °�� EXISTING SEDIMENT / � \\�� ' 4.� —�'� � / / � \ \� - BASIN \\GROUNDWATER REVIEWED BY: VB ISSUED FOR: REPORT MW-16S 9g 3 DATE: 02/20/2020 SMP-5 ' �9 =. ✓ �_ -16D �� ''�� O \ re 100" � I -� ' 000 fts DRAWING NAME: -1V 18 �- MW 19 994.24 993.96 / G GROUNDWATER SURFACE CONTOUR MAP 01, NOVEMBER 6, 2019 / _ GRAPHIC SCALE _ 0 100 200 400 1 \�� I —�_ —� (FEET) �� DRAWING NUMBER: Appendix Appendix A Groundwater Statistical Analysis Worksheets Concentrations (pg/L) Parameter: Cobalt Original Data (Not Transformed) Non -Detects Replaced with 1/2 DL Total Measurements: 14 Total Non -Detect: 0 Percent Non -Detects: 0% Total Background Measurements: 14 There are 3 background locations Loc. Meas. ND MW-17 2 0 (0% MW-20 2 0 (0%) MW-21 10 0 (0%) Date Conc. Original 11 /2/2006 2.5 2.5 6/1/2011 7.8 7.8 5/30/2012 2.5 2.5 10/28/2013 2.5 2.5 4/10/2014 2.5 2.5 5/6/2014 2.5 2.5 10/22/2014 2.5 2.5 5/20/2015 2.5 2.5 5/3/2016 4 4 12/13/2016 2.5 2.5 6/27/2017 2.5 2.5 12/13/2017 2.5 2.5 5/16/2018 2.5 2.5 12/6/2018 2.5 2.5 There are 0 compliance locations Loc. Meas. ND Date Conc. Original There are 0 unused locations Loc. Meas. ND Date Page 1 Conc. Original Shapiro-Wilks Test of Normality Parameter: Cobalt All Locations Normality Test of Parameter Concentrations Original Data (Not Transformed) Non -Detects Replaced with 1/2 DL K = 7 for 14 measurements i x(i) x(n-i+1) x(n-1+1)-x(i) 1 2.5 7.8 5.3 2 2.5 4 1.5 3 2.5 2.5 0 4 2.5 2.5 0 5 2.5 2.5 0 6 2.5 2.5 0 7 2.5 2.5 0 8 2.5 2.5 0 9 2.5 2.5 0 10 2.5 2.5 0 11 2.5 2.5 0 12 2.5 2.5 0 13 4 2.5 -1.5 14 7.8 2.5 -5.3 Sum of b values = 3.28073 Sample Standard Deviation = 1.44214 W Statistic = 0.398089 5% Critical value of 0.874 exceeds 0.398089 Evidence of non -normality at 95% level of significance 1% Critical value of 0.825 exceeds 0.398089 Evidence of non -normality at 99% level of significance Page 1 a(n-i+1) 0.5251 0.3318 0.246 0.1802 0.124 0.0727 0.024 b(i) 2.78303 0.4977 0 0 0 0 0 Concentrations (pg/L) Parameter: Cobalt Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL Total Measurements: 14 Total Non -Detect: 0 Percent Non -Detects: 0% Total Background Measurements: 14 There are 3 background locations Loc. Meas. ND MW-17 2 0 (0% MW-20 2 0 (0%) MW-21 10 0 (0%) Date Conc. Original 11 /2/2006 0.916291 2.5 6/1/2011 2.05412 7.8 5/30/2012 0.916291 2.5 10/28/2013 0.916291 2.5 4/10/2014 0.916291 2.5 5/6/2014 0.916291 2.5 10/22/2014 0.916291 2.5 5/20/2015 0.916291 2.5 5/3/2016 1.38629 4 12/13/2016 0.916291 2.5 6/27/2017 0.916291 2.5 12/13/2017 0.916291 2.5 5/16/2018 0.916291 2.5 12/6/2018 0.916291 2.5 There are 0 compliance locations Loc. Meas. ND Date Conc. Original There are 0 unused locations Loc. Meas. ND Date Page 1 Conc. Original Shapiro-Wilks Test of Normality Parameter: Cobalt All Locations Normality Test of Parameter Concentrations Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL K = 7 for 14 measurements i x(i) x(n-i+1) x(n-1+1)-x(i) a(n-i+1) b(i) 1 0.916291 2.05412 1.13783 0.5251 0.597476 2 0.916291 1.38629 0.470004 0.3318 0.155947 3 0.916291 0.916291 0 0.246 0 4 0.916291 0.916291 0 0.1802 0 5 0.916291 0.916291 0 0.124 0 6 0.916291 0.916291 0 0.0727 0 7 0.916291 0.916291 0 0.024 0 8 0.916291 0.916291 0 9 0.916291 0.916291 0 10 0.916291 0.916291 0 11 0.916291 0.916291 0 12 0.916291 0.916291 0 13 1.38629 0.916291 -0.470004 14 2.05412 0.916291 -1.13783 Sum of b values = 0.753423 Sample Standard Deviation = 0.319966 W Statistic = 0.426509 5% Critical value of 0.874 exceeds 0.426509 Evidence of non -normality at 95% level of significance 1% Critical value of 0.825 exceeds 0.426509 Evidence of non -normality at 99% level of significance Page 1 Dixon's Test for Outliers Parameter: Cobalt All Locations Original Data (Not Transformed) Non -Detects Replaced with 1/2 DL For 14 Measurements... 5% Level of Significance Iteration Highest Lowest Critical A Divide -By -Zero error occurred in the calculations. Additional Outliers May Exist. Loc. Date Conc. Outlier MW-17 11/2/2006 2.5 FALSE 6/1/2011 7.8 FALSE MW-20 5/30/2012 2.5 FALSE 10/28/2013 2.5 FALSE MW-21 4/10/2014 2.5 FALSE 5/6/2014 2.5 FALSE 10/22/2014 2.5 FALSE 5/20/2015 2.5 FALSE 5/3/2016 4 FALSE 12/13/2016 2.5 FALSE 6/27/2017 2.5 FALSE 12/13/2017 2.5 FALSE 5/16/2018 2.5 FALSE 12/6/2018 2.5 FALSE Page 1 Outlier Concentrations (pg/L) Parameter: Iron Original Data (Not Transformed) Non -Detects Replaced with 1/2 DL Total Measurements: 13 Total Non -Detect: 0 Percent Non -Detects: 0% Total Background Measurements: 13 There are 3 background locations Loc. Meas. ND Date Conc. Original MW-17 1 0 (0%) 6/1/2011 308 308 MW-20 2 0 (0%) 5/30/2012 5940 5940 10/28/2013 883 883 MW-21 10 0 (0%) 4/10/2014 2.5 2.5 5/6/2014 177 177 10/22/2014 2340 2340 5/20/2015 350 350 5/3/2016 7630 7630 12/13/2016 2020 2020 6/27/2017 2340 2340 12/13/2017 1030 1030 5/16/2018 295 295 12/6/2018 141 141 There are 0 compliance locations Loc. Meas. ND Date Conc. Original There are 0 unused locations Loc. Meas. ND Date Page 1 Conc. Original Shapiro-Wilks Test of Normality Parameter: Iron All Locations Normality Test of Parameter Concentrations Original Data (Not Transformed) Non -Detects Replaced with 1/2 DL K = 6 for 13 measurements i x(i) x(n-i+1) x(n-1+1)-x(i) 1 2.5 7630 7627.5 2 141 5940 5799 3 177 2340 2163 4 295 2340 2045 5 308 2020 1712 6 350 1030 680 7 883 883 0 8 1030 350 -680 9 2020 308 -1712 10 2340 295 -2045 11 2340 177 -2163 12 5940 141 -5799 13 7630 2.5 -7627.5 Sum of b values = 7111.34 Sample Standard Deviation = 2387.55 W Statistic = 0.739295 5% Critical value of 0.866 exceeds 0.739295 Evidence of non -normality at 95% level of significance 1% Critical value of 0.814 exceeds 0.739295 Evidence of non -normality at 99% level of significance Page 1 a(n-i+1) 0.5359 0.3325 0.2412 0.1707 0.1099 0.0539 b(i) 4087.58 1928.17 521.716 349.082 188.149 36.652 Dixon's Test for Outliers Parameter: Iron All Locations Original Data (Not Transformed) Non -Detects Replaced with 1/2 DL For 13 Measurements... 5% Level of Significance Iteration Highest Lowest Critical Outlier 1 0.706369 0.0293895 0.521 7630 2 0.620797 0.0746524 0.546 5940 3 0.145521 0.0746524 0.576 None Loc. Date Conc. Outlier MW-17 6/1/2011 308 FALSE MW-20 5/30/2012 5940 TRUE 10/28/2013 883 FALSE MW-21 4/10/2014 2.5 FALSE 5/6/2014 177 FALSE 10/22/2014 2340 FALSE 5/20/2015 350 FALSE 5/3/2016 7630 TRUE 12/13/2016 2020 FALSE 6/27/2017 2340 FALSE 12/13/2017 1030 FALSE 5/16/2018 295 FALSE 12/6/2018 141 FALSE Page 1 Dixon's Test for Outliers Parameter: Iron All Locations Original Data (Not Transformed) Non -Detects Replaced with Detection Limit For 11 Measurements... 5% Level of Significance Iteration Highest Lowest Critical 1 0.145521 0.0746524 0.576 Loc. Date Conc. Outlier MW-17 MW-20 MW-21 6/1 /2011 10/28/2013 4/10/2014 5/6/2014 10/22/2014 5/20/2015 12/13/2016 6/27/2017 12/13/2017 5/16/2018 12/6/2018 308 FALSE 883 FALSE 2.5 177 2340 350 2020 2340 1030 295 141 FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE Page 1 Outlier None Concentrations (pg/L) Parameter: Iron Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL Total Measurements: 11 Total Non -Detect: 0 Percent Non -Detects: 0% Total Background Measurements: 11 There are 3 background locations Loc. Meas. ND Date Conc. Original MW-17 1 0 (0%) 6/1/2011 5.7301 308 MW-20 1 0 (0%) 10/28/2013 6.78333 883 5/30/2012 8.68946 5940 MW-21 9 0 (0%) 4/10/2014 0.916291 2.5 5/6/2014 5.17615 177 10/22/2014 7.75791 2340 5/20/2015 5.85793 350 12/13/2016 7.61085 2020 6/27/2017 7.75791 2340 12/13/2017 6.93731 1030 5/16/2018 5.68698 295 12/6/2018 4.94876 141 5/3/2016 8.93984 7630 There are 0 compliance locations Loc. Meas. ND Date Conc. Original There are 0 unused locations Loc. Meas. ND Date Page 1 Conc. Original Shapiro-Wilks Test of Normality Parameter: Iron All Locations Normality Test of Parameter Concentrations Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL K = 5 for 11 measurements i x(i) x(n-i+1) x(n-1+1)-x(i) a(n-i+1) b(i) 1 0.916291 7.75791 6.84162 0.5601 3.83199 2 4.94876 7.75791 2.80915 0.3315 0.931232 3 5.17615 7.61085 2.4347 0.226 0.550243 4 5.68698 6.93731 1.25034 0.1429 0.178673 5 5.7301 6.78333 1.05323 0.0395 0.0416024 6 5.85793 5.85793 0 7 6.78333 5.7301 -1.05323 8 6.93731 5.68698 -1.25034 9 7.61085 5.17615 -2.4347 10 7.75791 4.94876 -2.80915 11 7.75791 0.916291 -6.84162 Sum of b values = 5.53374 Sample Standard Deviation = 1.94994 W Statistic = 0.805366 5% Critical value of 0.85 exceeds 0.805366 Evidence of non -normality at 95% level of significance 1 % Critical value of 0.792 is less than 0.805366 Data is normally distributed at 99% level of significance Page 1 Dixon's Test for Outliers Parameter: Iron All Locations Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL For 11 Measurements... 5% Level of Significance Iteration Highest Lowest Critical Outlier 1 0.0523481 0.622639 0.576 0.916291 2 0 0.0809462 0.477 None Loc. Date Conc. Outlier MW-17 6/1/2011 5.7301 FALSE MW-20 10/28/2013 6.78333 FALSE MW-21 4/10/2014 0.916291 TRUE 5/6/2014 5.17615 FALSE 10/22/2014 7.75791 FALSE 5/20/2015 5.85793 FALSE 12/13/2016 7.61085 FALSE 6/27/2017 7.75791 FALSE 12/13/2017 6.93731 FALSE 5/16/2018 5.68698 FALSE 12/6/2018 4.94876 FALSE Page 1 Dixon's Test for Outliers Parameter: Iron All Locations Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL For 10 Measurements... 5% Level of Significance Iteration Highest Lowest Critical 1 0 0.0809462 0.477 Loc. Date Conc. Outlier MW-17 MW-20 MW-21 6/1 /2011 10/28/2013 5/6/2014 10/22/2014 5/20/2015 12/13/2016 6/27/2017 12/13/2017 5/16/2018 12/6/2018 5.7301 FALSE 6.78333 FALSE Outlier None 5.17615 FALSE 7.75791 FALSE 5.85793 FALSE 7.61085 FALSE 7.75791 FALSE 6.93731 FALSE 5.68698 FALSE 4.94876 FALSE Page 1 Concentrations (pg/L) Parameter: Iron Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL Total Measurements: 10 Total Non -Detect: 0 Percent Non -Detects: 0% Total Background Measurements: 10 There are 3 background locations Loc. Meas. ND Date Conc. Original MW-17 1 0 (0%) 6/1/2011 5.7301 308 MW-20 1 0 (0%) 10/28/2013 6.78333 883 5/30/2012 8.68946 5940 MW-21 8 0 (0%) 5/6/2014 5.17615 177 10/22/2014 7.75791 2340 5/20/2015 5.85793 350 12/13/2016 7.61085 2020 6/27/2017 7.75791 2340 12/13/2017 6.93731 1030 5/16/2018 5.68698 295 12/6/2018 4.94876 141 4/10/2014 0.916291 2.5 5/3/2016 8.93984 7630 There are 0 compliance locations Loc. Meas. ND Date Conc. Original There are 0 unused locations Loc. Meas. ND Date Conc. Original Page 1 Shapiro-Wilks Test of Normality Parameter: Iron All Locations Normality Test of Parameter Concentrations Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL K = 5 for 10 measurements i x(i) x(n-i+1) x(n-1+1)-x(i) a(n-i+1) b(i) 1 4.94876 7.75791 2.80915 0.5739 1.61217 2 5.17615 7.75791 2.58176 0.3291 0.849656 3 5.68698 7.61085 1.92388 0.2141 0.411902 4 5.7301 6.93731 1.20721 0.1224 0.147763 5 5.85793 6.78333 0.925392 0.0399 0.0369231 6 6.78333 5.85793 -0.925392 7 6.93731 5.7301 -1.20721 8 7.61085 5.68698 -1.92388 9 7.75791 5.17615 -2.58176 10 7.75791 4.94876 -2.80915 Sum of b values = 3.05841 Sample Standard Deviation = 1.07695 W Statistic = 0.896102 5% Critical value of 0.842 is less than 0.896102 Data is normally distributed at 95% level of significance 1 % Critical value of 0.781 is less than 0.896102 Data is normally distributed at 99% level of significance Page 1 Parametric Tolerance Interval Analysis Parameter: Iron Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL USEPA 1989 Guidance Tolerance Limit Formula (One -Tailed) Background observations = 10 Background mean = 6.42472 Background standard deviation = 1.07695 One-sided normal tolerance factor (K) at 95% confidence = 2.911 Upper tolerance limit = 9.55973 Location Date Value Significant Page 1 Concentrations (pg/L) Parameter: Manganese Original Data (Not Transformed) Non -Detects Replaced with Detection Limit Total Measurements: 13 Total Non -Detect: 0 Percent Non -Detects: 0% Total Background Measurements: 13 There are 3 background locations Loc. Meas. ND Date Conc. Original MW-17 1 0 (0%) 6/1/2011 385 385 MW-20 2 0 (0%) 5/30/2012 104 104 10/28/2013 80 80 MW-21 10 0 (0%) 4/10/2014 20.8 20.8 5/6/2014 22.5 22.5 10/22/2014 73.6 73.6 5/20/2015 27.4 27.4 5/3/2016 142 142 12/13/2016 48.1 48.1 6/27/2017 60.3 60.3 12/13/2017 40.8 40.8 5/16/2018 25.8 25.8 12/6/2018 23.6 23.6 There are 0 compliance locations Loc. Meas. ND Date Conc. Original There are 0 unused locations Loc. Meas. ND Date Page 1 Conc. Original Shapiro-Wilks Test of Normality Parameter: Manganese All Locations Normality Test of Parameter Concentrations Original Data (Not Transformed) Non -Detects Replaced with Detection Limit K = 6 for 13 measurements i x(i) x(n-i+1) x(n-1+1)-x(i) 1 20.8 385 364.2 2 22.5 142 119.5 3 23.6 104 80.4 4 25.8 80 54.2 5 27.4 73.6 46.2 6 40.8 60.3 19.5 7 48.1 48.1 0 8 60.3 40.8 -19.5 9 73.6 27.4 -46.2 10 80 25.8 -54.2 11 104 23.6 -80.4 12 142 22.5 -119.5 13 385 20.8 -364.2 Sum of b values = 269.681 Sample Standard Deviation = 98.3657 W Statistic = 0.626374 5% Critical value of 0.866 exceeds 0.626374 Evidence of non -normality at 95% level of significance 1% Critical value of 0.814 exceeds 0.626374 Evidence of non -normality at 99% level of significance Page 1 a(n-i+1) 0.5359 0.3325 0.2412 0.1707 0.1099 0.0539 b(i) 195.175 39.7338 19.3925 9.25194 5.07738 1.05105 Concentrations (pg/L) Parameter: Manganese Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL Total Measurements: 13 Total Non -Detect: 0 Percent Non -Detects: 0% Total Background Measurements: 13 There are 3 background locations Loc. Meas. ND Date Conc. Original MW-17 1 0 (0%) 6/1/2011 5.95324 385 MW-20 2 0 (0%) 5/30/2012 4.64439 104 10/28/2013 4.38203 80 MW-21 10 0 (0%) 4/10/2014 3.03495 20.8 5/6/2014 3.11352 22.5 10/22/2014 4.29865 73.6 5/20/2015 3.31054 27.4 5/3/2016 4.95583 142 12/13/2016 3.87328 48.1 6/27/2017 4.09933 60.3 12/13/2017 3.70868 40.8 5/16/2018 3.25037 25.8 12/6/2018 3.16125 23.6 There are 0 compliance locations Loc. Meas. ND Date Conc. Original There are 0 unused locations Loc. Meas. ND Date Page 1 Conc. Original Shapiro-Wilks Test of Normality Parameter: Manganese All Locations Normality Test of Parameter Concentrations Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL K = 6 for 13 measurements i x(i) x(n-i+1) x(n-1+1)-x(i) a(n-i+1) b(i) 1 3.03495 5.95324 2.91829 0.5359 1.56391 2 3.11352 4.95583 1.84231 0.3325 0.612569 3 3.16125 4.64439 1.48314 0.2412 0.357734 4 3.25037 4.38203 1.13165 0.1707 0.193173 5 3.31054 4.29865 0.988102 0.1099 0.108592 6 3.70868 4.09933 0.39065 0.0539 0.021056 7 3.87328 3.87328 0 8 4.09933 3.70868 -0.39065 9 4.29865 3.31054 -0.988102 10 4.38203 3.25037 -1.13165 11 4.64439 3.16125 -1.48314 12 4.95583 3.11352 -1.84231 13 5.95324 3.03495 -2.91829 Sum of b values = 2.85704 Sample Standard Deviation = 0.863345 W Statistic = 0.912602 5% Critical value of 0.866 is less than 0.912602 Data is normally distributed at 95% level of significance 1 % Critical value of 0.814 is less than 0.912602 Data is normally distributed at 99% level of significance Page 1 Dixon's Test for Outliers Parameter: Manganese All Locations Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL For 13 Measurements... 5% Level of Significance Iteration Highest Lowest Critical 1 0.460908 0.0657481 0.521 Loc. Date Conc. Outlier MW-17 MW-20 MW-21 6/1 /2011 5/30/2012 10/28/2013 4/10/2014 5/6/2014 10/22/2014 5/20/2015 5/3/2016 12/13/2016 6/27/2017 12/13/2017 5/16/2018 12/6/2018 5.95324 FALSE 4.64439 FALSE 4.38203 FALSE 3.03495 3.11352 4.29865 3.31054 4.95583 3.87328 4.09933 3.70868 3.25037 3.16125 FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE Page 1 Outlier None Parametric Tolerance Interval Analysis Parameter: Manganese Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL USEPA 1989 Guidance Tolerance Limit Formula (One -Tailed) Background observations = 13 Background mean = 3.98354 Background standard deviation = 0.863345 One-sided normal tolerance factor (K) at 95% confidence = 2.67 Upper tolerance limit = 6.28867 Location Date Value Significant Page 1 Concentrations (pg/L) Parameter: Vanadium Original Data (Not Transformed) Non -Detects Replaced with Detection Limit Total Measurements: 14 Total Non -Detect: 0 Percent Non -Detects: 0% Total Background Measurements: 14 There are 3 background locations Loc. Meas. ND MW-17 2 0 (0% MW-20 2 0 (0%) MW-21 10 0 (0%) Date Conc. Original 11 /2/2006 2.5 2.5 6/1/2011 0.69 0.69 5/30/2012 9.2 9.2 10/28/2013 2.5 2.5 4/10/2014 2.5 2.5 5/6/2014 2.5 2.5 10/22/2014 9.6 9.6 5/20/2015 2.5 2.5 5/3/2016 29.7 29.7 12/13/2016 6.8 6.8 6/27/2017 9.4 9.4 12/13/2017 4.2 4.2 5/16/2018 2.5 2.5 12/6/2018 2.5 2.5 There are 0 compliance locations Loc. Meas. ND Date Conc. Original There are 0 unused locations Loc. Meas. ND Date Page 1 Conc. Original Shapiro-Wilks Test of Normality Parameter: Vanadium All Locations Normality Test of Parameter Concentrations Original Data (Not Transformed) Non -Detects Replaced with Detection Limit K = 7 for 14 measurements i x(i) x(n-i+1) x(n-1+1)-x(i) 1 0.69 29.7 29.01 2 2.5 9.6 7.1 3 2.5 9.4 6.9 4 2.5 9.2 6.7 5 2.5 6.8 4.3 6 2.5 4.2 1.7 7 2.5 2.5 0 8 2.5 2.5 0 9 4.2 2.5 -1.7 10 6.8 2.5 -4.3 11 9.2 2.5 -6.7 12 9.4 2.5 -6.9 13 9.6 2.5 -7.1 14 29.7 0.69 -29.01 Sum of b values = 21.1505 Sample Standard Deviation = 7.4089 W Statistic = 0.626886 5% Critical value of 0.874 exceeds 0.626886 Evidence of non -normality at 95% level of significance 1% Critical value of 0.825 exceeds 0.626886 Evidence of non -normality at 99% level of significance Page 1 a(n-i+1) 0.5251 0.3318 0.246 0.1802 0.124 0.0727 0.024 b(i) 15.2332 2.35578 1.6974 1.20734 0.5332 0.12359 0 Concentrations (pg/L) Parameter: Vanadium Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL Total Measurements: 14 Total Non -Detect: 0 Percent Non -Detects: 0% Total Background Measurements: 14 There are 3 background locations Loc. Meas. ND MW-17 2 0 (0% MW-20 2 0 (0%) MW-21 10 0 (0%) Date Conc. Original 11 /2/2006 0.916291 2.5 6/1/2011 -0.371064 0.69 5/30/2012 2.2192 9.2 10/28/2013 0.916291 2.5 4/10/2014 0.916291 2.5 5/6/2014 0.916291 2.5 10/22/2014 2.26176 9.6 5/20/2015 0.916291 2.5 5/3/2016 3.39115 29.7 12/13/2016 1.91692 6.8 6/27/2017 2.24071 9.4 12/13/2017 1.43508 4.2 5/16/2018 0.916291 2.5 12/6/2018 0.916291 2.5 There are 0 compliance locations Loc. Meas. ND Date Conc. Original There are 0 unused locations Loc. Meas. ND Date Page 1 Conc. Original Shapiro-Wilks Test of Normality Parameter: Vanadium All Locations Normality Test of Parameter Concentrations Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL K = 7 for 14 measurements i x(i) x(n-i+1) x(n-1+1)-x(i) 1 -0.371064 3.39115 3.76221 2 0.916291 2.26176 1.34547 3 0.916291 2.24071 1.32442 4 0.916291 2.2192 1.30291 5 0.916291 1.91692 1.00063 6 0.916291 1.43508 0.518794 7 0.916291 0.916291 0 8 0.916291 0.916291 0 9 1.43508 0.916291 -0.518794 10 1.91692 0.916291 -1.00063 11 2.2192 0.916291 -1.30291 12 2.24071 0.916291 -1.32442 13 2.26176 0.916291 -1.34547 14 3.39115 -0.371064 -3.76221 Sum of b values = 3.14435 Sample Standard Deviation = 0.925182 W Statistic = 0.888514 5% Critical value of 0.874 is less than 0.888514 Data is normally distributed at 95% level of significance 1 % Critical value of 0.825 is less than 0.888514 Data is normally distributed at 99% level of significance Page 1 a(n-i+1) 0.5251 0.3318 0.246 0.1802 0.124 0.0727 0.024 b(i) 1.97554 0.446428 0.325807 0.234785 0.124078 0.0377163 0 Dixon's Test for Outliers Parameter: Vanadium All Locations Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL For 14 Measurements... 5% Level of Significance Iteration Highest Lowest Critical 1 0.46485 0.492904 0.546 Loc. Date Conc. Outlier MW-17 M W-21 11 /2/2006 6/1 /2011 5/30/2012 10/28/2013 4/10/2014 5/6/2014 10/22/2014 5/20/2015 5/3/2016 12/13/2016 6/27/2017 12/13/2017 5/16/2018 12/6/2018 0.916291 FALSE -0.371064 FALSE 2.2192 FALSE 0.916291 FALSE 0.916291 0.916291 2.26176 0.916291 3.39115 1.91692 2.24071 1.43508 0.916291 0.916291 FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE FALSE Page 1 Outlier None Parametric Tolerance Interval Analysis Parameter: Vanadium Natural Logarithm Transformation Non -Detects Replaced with 1/2 DL USEPA 1989 Guidance Tolerance Limit Formula (One -Tailed) Background observations = 14 Background mean = 1.39341 Background standard deviation = 0.925182 One-sided normal tolerance factor (K) at 95% confidence = 2.614 Upper tolerance limit = 3.81184 Location Date Value Significant Page 1