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HomeMy WebLinkAbout5803_MadisonCounty_ASD_DIN28409_20170609June 9, 2017 Anchor QEA of North Carolina, PLLC 231 Haywood Street Asheville, North Carolina 28801 828.281.3350 \\asheville1\asheville\Projects\Madison County\2017 DEQ Response\DRAFT_Response_Ltr_170608.docx Ms. Jaclynne Drummond Compliance Hydrogeologist North Carolina Department of Environmental Quality Division of Waste Management 2090 US Highway 70 Swannanoa, North Carolina 28778 Re: Alternate Source Demonstration Madison County Operating Solid Waste Facility Permit # 5803-MSWLF-1993, DIN 26569 Dear Ms. Drummond, Anchor QEA of North Carolina, PLLC (Anchor QEA) is pleased to present this Alternate Source Demonstration (ASD) in response to the North Carolina Department of Environmental Quality (DEQ) Solid Waste Section’s (SWS) letter (Notice), dated August 8, 2016, regarding exceedances of Appendix I inorganic constituent standards established in North Carolina Administrative Code, Title 15A, Subchapter 2L, Section .0202 (15A NCAC 02L .0202 [2L standards]). The Madison County Solid Waste Department operates the Madison County Operating Solid Waste Facility (Landfill) located on Craig Rudisill Road, west of U.S. Highway 25/70 near Marshall, North Carolina. A site location map is included as Figure 1. The Landfill includes the following permitted components: • Operating Construction and Demolition Debris (C&D) Landfill cell (Permit No. 58-03) • Operating Transfer Station (Permit No. 58-03T) • Closed C&D Landfill cell (Permit No. 58-03) • Closed Municipal Solid Waste (MSW) Landfill cell (Permit No. 58-03) The Notice from the SWS required Madison County to either implement an assessment monitoring program or prepare and submit an ASD within 90 days of receipt of this letter. Due to late receipt of the Notice, Madison County requested two extensions to prepare an adequate response to the Notice, with a due date of June 9, 2017. According to the Notice, if the ASD is successful and is approved by the Section, the Landfill may continue detection monitoring. If the Section does not approve the ASD, the Landfill will be required to initiate assessment monitoring in accordance with 15A NCAC 13B .1634. June 9, 2017 Page 2 1.0 Constituents of Concern The subject Notice referenced exceedances of 2L standards for inorganic constituents. Based on a review of historical analytical results, there have been 2L standards exceedances at the Landfill involving a range of inorganic constituents. However, many have occurred sporadically and not during recent sampling events. The only inorganic constituents of concern (COCs) that have exceeded 2L standards during recent sampling events or with regular consistency include cadmium, cobalt, and vanadium. Therefore, this ASD will focus on these COCs. Anchor QEA’s review of historical analytical results indicates that the only groundwater samples that exceed the 2L standards for cadmium were collected from monitoring wells MW-03, MW-06R, MW-07R, and MW-9. Groundwater and surface water sample results have shown that cobalt and vanadium concentrations have exceeded the their respective 2L and 2B standards in all Landfill monitoring wells and surface water sampling locations. The 2L and 2B standards have been periodically exceeded in the upstream surface water (SW-01) and upgradient groundwater (MW-06R) sampling locations since monitoring began at these locations and suggests that many of these constituents that exceed standards at the downgradient and downstream sampling locations are due to naturally occurring elements. 2.0 ASD Methodology Anchor QEA chose to explore four potential paths of evidence that could show that metal concentrations that exceed the 2L standards are due to naturally-occurring background conditions, as follows: 1. A review of historical analytical results in relation to turbidity levels to see if there is a correlation between high inorganic concentrations and high turbidity levels 2. A review of surface water data to determine if analytical results upstream of the Landfill exhibit inorganic concentrations that indicate that parent geologic material contains significant concentrations of inorganics 3. The collection of samples during the April 2017 sampling event and subsequent laboratory analysis for total metals, as well as dissolved metals, in an effort to further determine if sediment contained in the samples could be impacting the relative integrity of the samples as representative of true groundwater conditions 4. A review of publications to determine if evidence is available to indicate that parent geologic material in the area of the Landfill contains significant concentrations of inorganics that could be contributing to groundwater concentrations at the Landfill Also included as part of this ASD, is a brief review of potential receptors to determine the potential for the Landfill to impact human health and the environment. June 9, 2017 Page 3 3.0 ASD Findings 3.1 Historical Analytical Results and Turbidity An analysis of historical data (Table 1) was performed to determine if turbidity present in samples collected from the Landfill’s monitoring wells and two surface water locations may be influencing concentrations of inorganics in the samples. These sampling locations are provided on Figure 2. Detected concentrations of analytes in groundwater samples were compared to the values specified in the 2L standard. Detected concentrations of analytes in groundwater with no established 2L standard were compared to an updated list of the interim maximum allowable concentrations (IMACs) for Class GA and GSA groundwater (in accordance with 15A NCAC 02L .0202 [c]). Detections of analytes in surface water samples were compared to the 15A NCAC 2B.0200 surface water quality standard (2B standard) established for class C waters. Tables 1 and 2 summarize the historical data relative to their appropriate standards. Figure 3 provides plots for each monitoring well and surface water sampling location, and shows the sum of metals versus turbidity. Review of this figure shows that in wells MW-05, MW-06R (upgradient well), MW-07R, MW-08, and MW-09, high turbidity levels result in elevated metal concentrations. Figure 4 provides graphs for those monitoring wells that consistently have the highest concentrations of cobalt and vanadium, as well as the two surface water monitoring locations, and compares those inorganic concentrations with turbidity levels. These graphs make clear, that in some wells turbidity plays a significant role in elevated metals concentrations. The correlation between high inorganic concentrations and high turbidity levels, is discussed in the following sections for each sampling location. 3.1.1 Monitoring Well MW-01 Cadmium has only been detected once in this monitoring well, and was well below the applicable 2L standard. Cobalt and vanadium concentrations have generally been declining in MW-01 since the October 2007 sampling event. The higher concentrations of these metals, as well as other metals shown on Table 1, may be due to poor well development following the installation of this well. With additional sampling events over the years, which would remove additional fine-grained material from the monitoring well, inorganic concentrations have declined. 3.1.2 Monitoring Well MW-02 Cadmium has only been detected above the laboratory method detection limit (MDL) on one occasion. That detection was well below the 2L standard. Cobalt concentrations in monitoring well MW-02 exceeded the applicable IMAC in 20 of 22 sampling events. Cobalt concentrations have generally been decreasing in MW-02 since October 2010, as shown on Table 1. Vanadium exceeded June 9, 2017 Page 4 the applicable IMAC in 9 of the 22 samples collected from this well since 2007. All of the vanadium exceedances have been estimated (J-flagged) by the laboratory, as indicated on Table 1. The concentration of cobalt and vanadium, when compared to turbidity, show slightly increasing trends, and suggests that turbidity plays a role in metals concentrations exceedances (Figure 4). 3.1.3 Monitoring Well MW-03 Cadmium has been detected in two recent monitoring events (April and October 2016) and exhibited concentrations above the applicable 2L standard, as shown on Table 1. Cobalt concentrations in monitoring well MW-03 exceeded the applicable IMAC in all of the samples collected since 2007. Concentrations ranged between 34 micrograms per liter (µg/L) and 161 µg/L. These concentrations do not appear to be related to turbidity levels, as shown on Figure 4. Vanadium concentrations exceeded the applicable IMAC in 10 of the 22 samples collected from this monitoring well. Concentrations of vanadium ranged between 0.33 J µg/L and 15.5 J µg/L. All of the vanadium exceedances have been noted as estimated (J-flagged) by the laboratory, as shown on Table 1. These concentrations have been estimated because the laboratory method detection limit (MDL [0.7 µg/L]) is higher than the IMAC (0.3 µg/L). Vanadium concentration show a very slight increase with turbidity. 3.1.4 Monitoring Well MW-04 Cadmium has not been detected above the MDL in MW-04. Cobalt concentrations in monitoring well MW-04 exceeded the applicable IMAC in 4 of 22 sampling events. Cobalt has not been detected in MW-04 since April 2011, as shown on Table 1. Vanadium exceeded the applicable IMAC in 15 of the 22 samples collected from this well since 2007, as shown on Table 1. Most of the vanadium exceedances have been estimated (J-flagged) by the laboratory. A graph of the sum of metals versus turbidity for metals results for MW-04 shows a fairly consistent range of concentrations that do not vary significantly with increased turbidity (Figure 3). 3.1.5 Monitoring Well MW-05 Cadmium has only been detected above the laboratory MDL on three occasions in MW-05. These detections were below the 2L standard. Cobalt and vanadium concentrations appear to be closely related to turbidity levels in monitoring well MW-05, as shown on Figure 4. Concentrations have generally declined since the October 2008 sampling event corresponding to an order of magnitude decrease in turbidity (Table 1). 3.1.6 Monitoring Well MW-06R (Background) Cadmium has been detected twice in monitoring well MW-06R, with one of those detections in exceedance of the 2L standard. Cobalt and vanadium concentrations appear to be closely related to turbidity levels in monitoring well MW-06R, as shown on Figure 3. Following the April 2011 sampling event, turbidity concentrations dropped significantly (Table 1), after which cobalt has not exceeded June 9, 2017 Page 5 its 2L standard. After the same sampling event, vanadium concentrations have maintained levels above 2L, but they have dropped in concentration by an order of magnitude. 3.1.7 Monitoring Well MW-07R Cadmium has been detected seven times in monitoring well MW-07R, with three of those detections in exceedance of the 2L standard, as indicated on Table 1. With the exception of a few statistical outliers, cobalt and vanadium concentrations appear to be influenced by increased turbidity levels in monitoring well MW-07R, as shown on Figure 4. Historical turbidity readings in this well range from 73.13 nephelometric turbidity units (NTUs) to 1,100 NTUs. These readings are significantly higher than turbidity readings from the other monitoring wells on-site. A review of Table 1 shows that elevated turbidity levels correspond with higher concentrations of metals. 3.1.8 Monitoring Well MW-08 Cadmium has not been detected above the laboratory MDL in MW-08. Cobalt concentrations in monitoring well MW-08 exceeded the applicable IMAC in 8 of 22 sampling events. Cobalt concentrations have generally been decreasing in MW-02 since April 2011, as shown in Table 1. This date corresponds to the last time a turbidity value was greater than 100 NTUs. Vanadium exceeded the applicable IMAC in 20 of the 22 samples collected from this well since 2007, as shown in Table 1. Like cobalt, concentrations for vanadium decrease significantly when turbidity values are less than 100 NTUs. The majority of the vanadium exceedances have been estimated (J-flagged) by the laboratory. Both Cobalt and Vanadium show elevated inorganic concentrations relative to higher turbidity levels. 3.1.9 Monitoring Well MW-09 Cadmium has only been detected above the laboratory MDL on two occasions in MW-09, with one of those detections above the applicable 2L standard, as shown on Table 1. Cobalt concentrations in monitoring well MW-09 exceeded the applicable IMAC in 9 of 22 sampling events. Cobalt concentrations have generally been decreasing in MW-09 since October 2010, as shown on Table 1. Vanadium exceeded the applicable IMAC in 16 of the 22 samples collected from this well since 2007 (Table 1). Cobalt and vanadium concentrations are low when turbidity levels are below 223 NTUs, as observed in Table 1. Both Cobalt and Vanadium concentrations are elevated relative to higher turbidity levels as shown on Figure 4. 3.2 Review of Surface Water Data SW-01 is the upstream surface water sampling location. The graphs on Figures 3 and 4 show the sum of metals concentrations versus turbidity and concentrations of cobalt and vanadium versus turbidity, respectively. What is apparent, is that there is not a strong correlation between high turbidity levels and elevated metals at this location. What the data do show are a few instances of high metal concentrations that correlate with high turbidity levels (Figures 3 and 4). Without the June 9, 2017 Page 6 highest turbidity level sample (887.40 NTU on October 29, 2014), cobalt shows a slight increase in concentration relative to elevated turbidity and vanadium is consistent with increased turbidity. SW-02 is the downstream surface water sampling location. Figures 3 and 4 show the sum of metals concentrations versus turbidity and concentrations of cobalt and vanadium versus turbidity, respectively. At SW-02, the sum of metals versus turbidity shows a generally increasing trend; however, strong correlations between turbidity and cobalt and vanadium do not exist. The October 15, 2013 sample, which contained the highest turbidity level, also exhibits the highest cobalt concentration, but vanadium was below the laboratory MDL. The detected concentrations of inorganic constituents in SW-01 and SW-02R do not appear to correlate directly with turbidity concentrations; however, with abnormally high turbidity values, elevated cobalt and vanadium concentrations have occurred. Furthermore, the presence of cobalt and vanadium in surface water samples collected from the upstream and downstream locations that are of similar concentrations to those observed in groundwater suggest that these elements are naturally occurring at the Landfill. 3.3 Filtered Versus Unfiltered Sample Results In order to further investigate the relationship between turbidity and metals concentrations, two sets of metals samples were collected from each monitoring well at the Landfill during the April 2017 sampling event. For each monitoring well sample, the first metals sample was collected directly from the sample tubing into the sample bottle, while the second metals sample was field-filtered through a 0.45-micron in-line groundwater sampling filter. A summary of these sampling results is presented in Table 2. Cadmium was not detected at or above the MDL of 0.500 µg/L in any monitoring well samples that were collected during the April 2017 sampling event. Cobalt was detected in seven unfiltered monitoring well samples, while it was only detected in four filtered samples. Moreover, the unfiltered samples generally contained higher concentrations of cobalt than did the filtered samples. Vanadium was detected in all filtered and unfiltered samples from the monitoring wells, and all measured concentrations were above the applicable IMAC. However, these samples were flagged by the laboratory with a “B” qualifier that indicates that vanadium was also detected in the laboratory blank. This indicates a potential for these results to be biased high. Additionally, many of these samples were reported as estimated (J-flagged) concentrations. Upon comparison of the filtered and unfiltered sample results, it appears that the results for the majority of inorganics are relatively similar in concentration for samples where turbidity is less than 20 NTUs. In the samples collected from MW-02 and MW-07R, the turbidity levels were 65.4 and 108, June 9, 2017 Page 7 respectively. This resulted in very different concentrations between the filtered and unfiltered groundwater samples (Figure 5). 3.4 Review of Available Publications Several publications were reviewed as part of this ASD to determine if parent material in the area of the Landfill contains significant concentrations of inorganics that could be contributing to groundwater concentrations at the Landfill. Ultimately, two United States Geological Survey (USGS) publications contained useful data and are discussed in the following paragraphs. 3.4.1 USGS NURE-HSSR Database The USGS National Uranium Resource Evaluation (NURE) Hydrogeochemical and Stream Sediment Reconnaissance (HSSR) database was reviewed as part of this ASD. Anchor QEA identified two sediment samples that were collected within 5 miles northeast of the Landfill in a direction that is parallel to the regional geology trends. The results of these stream sediment samples are as follows, and are presented in parts per million by weight: Table 1 Sediment Sample Results Sample ID Sieve Size Sample Collection Date Cadmium Cobalt Vanadium NCDM040S1 -100 06/09/1976 Not Analyzed Not Analyzed 100 150 <2 13 46 NCDM041S1 -100 06/09/1976 Not Analyzed Not Analyzed 90 150 0.09 14.7 78 Based on these concentrations contained in stream sediment, it is apparent that parent material in the vicinity of the Landfill contains as much as 90 parts per billion (µg/kg) cadmium, and as much as 14,700 µg/kg cobalt. Additionally, vanadium is present in parent material in concentrations as high as 100,000 µg/kg. Since these inorganics can be solubilized, it is possible that the parent materials in the area are contributing to dissolved inorganics in groundwater at the Landfill. 3.4.2 Element Concentrations In Soils And Other Surficial Materials Of The Conterminous United States This USGS publication is based on sample collection of surficial material at 863 locations across the United States. These surficial materials were analyzed for 35 elements, including cobalt and vanadium. According to this publication, a soil sample was collected from a location north of Asheville, approximately 20 miles south of the North Carolina-Tennessee border. The cobalt concentration in surficial material from this location was between 15 and 70 parts per million, or June 9, 2017 Page 8 15,000 to 70,000 µg/kg. Vanadium was found to have a concentration range of 90 to 110 parts per million, or as high as 90,000 to 110,000 µg/kg. Since these inorganics can be solubilized, it is possible that the parent materials near the Landfill are contributing to groundwater inorganic concentrations. 3.4.3 Elemental Variation Across Sampled Media Figure 6 displays the elemental concentrations detected in samples from the NURE database, the USGS Elemental Data, and from on-Site leachate, groundwater, and surface water. The elemental variations between the various media show similar patterns, particularly between the off-site sediment and soils when compared to the on-site leachate, suggesting that the elemental composition of soil materials used as fill in the Landfill operations is being leached out and mobilized. The groundwater and surface water data show similar patterns, with the greatest variability occurring with cobalt. The Landfill has a history of acidic groundwater pH, which may affect cobalt mobility from the native soil material used as cover and fill during Landfill operations. The area around the Landfill is known for a variety of magnetite ore bodies1,2. The presence of magnetite in the vicinity of the Landfill provides an explanation for the concentrations of vanadium observed in the area since vanadium is a common impurity in magnetite deposits. A direct mineralogical source for elevated cadmium and cobalt was not identified during this ASD; however, data from the NURE dataset and the USGS Elemental Data set shows that these constituents are present in the native materials. 3.5 Potential Receptors Figure 2 shows the generalized groundwater flow direction for the Landfill. Groundwater drains towards the unnamed tributary of Walnut Creek that is located on the western portion of the Landfill and flows in a south-to-north direction. This tributary discharges to Walnut Creek, which flows in an east-to-west direction and discharges into the French Broad River. Based on analytical results, it does not appear likely that the Landfill is impacting surface water. As such, Anchor QEA did not identify any potential receptors that exist downgradient of the Landfill. It is also important to note that Madison County owns the land located immediately north and south of the Landfill, as well as the land located west of the Landfill to the French Broad River. 4.0 Conclusions Upon review of data collected at the Landfill since 2007, it appears that suspended sediment (turbidity) in groundwater and surface water samples can be correlated with inorganic concentrations in the groundwater samples. 1 Nitze, H.B.C., 1893. Iron Ores of North Carolina: A Preliminary Report. 2 Bayley, W.S., 1923. Magnetic Iron Ores of East Tennessee and Western North Carolina. June 9, 2017 Page 9 Filtered and unfiltered samples were collected and analyzed for inorganic constituents during the April 2017 sampling event. Based on a review of filtered and unfiltered sample results, it is clear that the more turbid samples have higher concentrations of metals compared to samples with turbidity values that are less than 20 NTU. Two USGS publications indicate that parent material (i.e., bedrock) in the vicinity of the Landfill contains significant concentrations of cobalt and vanadium, with concentrations of cadmium also present. This parent material is likely contributing to inorganic concentrations in groundwater at the Landfill. This is supported by the fact that these inorganics are present in monitoring well MW-06R (background) in concentrations that often exceed 2L standards, and are also present in higher concentrations in surface water upstream (SW-01) of the Landfill than downstream (SW-02) of the Landfill. In addition, local geologic conditions suggest a source for vanadium in the native materials to be related to the presence of magnetite ores located in the vicinity of the Landfill. Anchor QEA has presented four lines of evidence that support the influence of high turbidity samples on total metal concentrations: 1) correlation with elevated turbidity; 2) filtered samples versus unfiltered samples showed differences when turbidity was greater than 20 NTUs; 3) upgradient groundwater and upstream surface water sample locations show similar concentrations as the downgradient and downstream sample locations, respectively; 4) data obtained from historical publications show that the native materials in the area of the Landfill have cadmium, cobalt, and vanadium concentrations that may attribute elevated concentrations observed in the sampled groundwater and surface water. These lines of evidence suggest that the exceeded groundwater standards are related to naturally occurring elements present in the native materials. Figures [0 2,0001,000 Feet LEGEND: Landfill Parcel Boundary Publish Date: 2017/05/04, 3:48 PM | User: alesueurFilepath: P:\Madison County\Figures\GIS\GIS User\MXDs\2017\Spring\5803Apr Figure 1-Site Location Map Operating AQ.mxd Figure 1Site Location Map Madison County Operating Solid Waste Facility, Permit #58-03, Marshall, NC SOURCE(S):Basemap: USGS 1:24,000 Scale Topo Maps, MarshallQuadrangle, 1990.Parcels: Madison County GIS Anchor QEA of North Carolina, PLLC !( % # I # I @A @A @A @A @A@A @A @A @A OperatingTransfer Station Former Leachate Basin POND % Tributary Flow Direction OperatingC&D Cell ClosedMSW Cell ClosedC&D Cell GroundwaterFlowDirection 2105 19 0 5 1875 199 5 1765 2 2 3 5 1 9 8 5 20 3 5 2095 2075 200 5 1785 19 6 5 1795 19 3 5 1745 1915 18 8 5 1985 1815 1 8 9 5 2075 1985199 5 1825 1 9 2 5 1755 1925 18351845 1895 19 1 5 1765 1 9 7 5 1 9 3 5 2 0 6 5 2 0 6 5 17351855 202 5 19 0 5 1745 2065 1 9 6 5 194 5 186 5 2 2 2 5 1 9 1 5 1955 1 9 5 5 1875 2 2 1 5 2055 2015 196 5 1 9 4 5 2205 1 9 8 5 197 5 2195 1 8 0 5 20 5 5 1925 1985 19 9 5 1 9 8 5 1 8 8 5 2185 19 9 5 193 5 1975 2045 2175 2005 19 6 5 20 1 5 1875 204 5 1945 2165 2135 1955 2125 2115 19 4 5 1915 21 5 5 2145 210 5 1745 1965 1755 209 5 1765 19 7 5 2015 2 0 0 5 19 9 5 1935 208 5 1975 207 5 206 5 1775 1965 17851795 2035 1815 2025 1825 18 9 5 1 8 3 5 194 5 2055 20 4 5 1955 1845 185 5 2035 1865 2 0 2 5 1875 2015 1895 1885 19 0 5 19 2 5 2 0 0 5 1 9 8 5 1 9 9 5 1 9 7 5 1 9 6 5 1915 19 2 5 193 5 1955 MW-05 (1,924.03) MW-07R (1,889.81) MW-02 (1,895.13) MW-08(1,879.44) MW-03 (1,911.30) MW-04 (1,908.01) MW-09 (1,942.38) MW-06R (1,935.74) MW-01 (1,853.95 SW-01 SW-02R [ 0 500 1,000250 Feet NOTE(S):1.(1,907.80) = Groundwater Elevation2.Groundwater (GW) flow direction based on GW elevations in water table wells MW-02, MW-03, MW-05, MW-06R, MW-07R, and MW-08.3.GW elevations based on depth to water measurements collected on April 3 and 4, 2017. LEGEND: @A Monitoring Well Location Groundwater Flow Direction !(Leachate Tank Location Roads Unnamed Tributary Elevation Contours (10ft Interval) Publish Date: 2017/05/17, 3:43 PM | User: alesueurFilepath: P:\Madison County\Figures\GIS\GIS User\MXDs\2017\Spring\5803Oct Figure 3-Groundwater Flow(2).mxd Figure 2Generalized Groundwater Flow Madison County Operating Solid Waste Facility, Permit #58-03, Marshall, NC SOURCE(S):Basemap: NC OneMap 2010Roads and Streams: Madison County GIS 2006 Anchor QEA of North Carolina, PLLC Figure 3 Sum of Metals versus Turbidity Madison County Operating Solid Waste Facility Permit #58-03, Marshall, NC File path: \\asheville1\asheville\Projects\Madison County\2017 DEQ Response\Figure 3 Sum of Metals vs. Turbidity.docx Sum of Metals vs. Turbidity for MW-03 0 100 200 300 400 500 600 0 50 100 150 200 250 300 350 400 450 500 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for MW-04 0 50 100 150 200 250 0 5 10 15 20 25 30 35 40 45 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for MW-02 1 51 101 151 201 251 301 351 401 451 0 10 20 30 40 50 60 70 80 90 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for MW-01 1 101 201 301 401 501 601 701 801 0 100 200 300 400 500 600 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for MW-05 0 200 400 600 800 1000 1200 1400 1600 1800 2000 0 200 400 600 800 1000 1200 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for MW-06R 0 500 1000 1500 2000 2500 0 200 400 600 800 1000 1200 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for MW-08 0 500 1000 1500 2000 2500 0 100 200 300 400 500 600 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for MW-07R 0 500 1000 1500 2000 2500 3000 3500 4000 4500 0 200 400 600 800 1000 1200 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for MW-09 0 500 1000 1500 2000 2500 3000 3500 4000 0 200 400 600 800 1000 1200 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for SW-02R 1 101 201 301 401 501 601 701 801 0 50 100 150 200 250 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Sum of Metals vs. Turbidity for SW-01 1 1001 2001 3001 4001 5001 6001 0 100 200 300 400 500 600 700 800 900 1000 Co n c e n t r a t i o n ( u g / L ) Turbidity (NTU) Figure 4 Turbidity versus Cobalt and Vanadium in Groundwater and Surface Water Sample Locations Madison County Operating Solid Waste Facility Permit #58-03, Marshall, NC File path: \\asheville1\asheville\Projects\Madison County\2017 DEQ Response\Figure 4 Turbidity vs Metal Trends2.docx Graphs show that, in general, increased turbidity relates to increased concentrations of cobalt and vanadium in both groundwater and surface water. Groundwater sample location MW-06R and surface water sample location SW-01 are both upgradient sample locations, which clearly show that with increased turbidity, metal concentrations also increase. The same would be expected in other well locations and the data generally support this observation. Figure 5 Relationship Between Turbidity and Total and Dissolved Metal Concentrations Madison County Operating Solid Waste Facility Permit #58-03, Marshall, NC File path: \\asheville1\asheville\Projects\Madison County\2017 DEQ Response\Figure 5 Dissolved Total Concentration Percent Difference 2017 Data.docx Graphs show the percent difference between total and dissolved metal concentrations for the April 2017 sampling event. The percent difference was calculated by dividing the average of the dissolved and total concentration into the difference between the total and dissolved concentration: % Difference = |Total-Dissolved|÷((Total+Dissolved)/2). The data show that samples with lower turbidity generally have very little difference in concentration (Plots C and D) and those with higher turbidity values have greater differences in concentration. Figure 6 Elemental Variation for Landfill Groundwater, Surface Water, Leachate and from Local Off-Site Soils and Sediment Madison County Operating Solid Waste Facility Permit #58-03, Marshall, NC File path: \\asheville1\asheville\Projects\Madison County\2017 DEQ Response\Figure 6 Elemental Variationv2.docx Comparison of the elemental variation between sediment and soil concentration ranges to the groundwater concentration ranges show similar concentration patterns. Particularly between the leachate sample and USGS Elemental Data for soils. This is not surprising since native soils are used as fill materials by mixing with deposited wastes within an active cell. Groundwater concentrations also reflect similar elemental patterns, with perhaps the greatest variability occurring in cadmium, cobalt, and vanadium. That said, cadmium, cobalt, and vanadium do exist naturally in soils and sediment from the area. Notes: Graph shows the elemental variation among samples types, which include leachate, sediment, groundwater, and soils. The data presented for leachate and groundwater is from the April 2016 sampling event. Data for off-Site sediment was obtained from the NURE data set. The sediment samples were collected from locations within 5 miles north of the Site. The USGS Elemental Data was obtained from soil samples collected from a location north of Asheville, approximately 20 miles south of the North Carolina-Tennessee border. Highlighted cells indicated non-detect values. Tables Table 1 Historical Analytical Results, April 2007 - Current CAS Number 7440-36-0 7440-38-2 7440-39-3 7440-41-7 7440-47-3 7440-50-8 7439-92-1 7439-97-6 7440-02-0 7782-49-2 7440-22-4 7440-28-0 7440-66-6 SW330 Solid Waste Section ID 13 14 15 23 51 54 131 132 152 183 184 194 213 330 Parameter Name Antimony Arsenic Barium Beryllium Chromium Copper Lead Mercury Nickel Selenium Silver Thallium Zinc Turbidity 2L or IMAC (Groundwater)1 10 700 4 10 1,000 15 1 100 20 20 0.2 1,000 NA 2B (Surface Water)640 10 200,000 6.5 35 2.7 0.54 0.012 16 5 0.06 0.47 36 25 WELL ID DATE ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L NTU 04/05/2007 2.6 U 2.7 U 250 0.35 J 0.5 U 17 0.6 U 15 4.0 U 0.20 U 9.2 J 12 0.50 U 3.6 J 53 60.06 10/10/2007 BQL U 4.2 J 397 BQL U BQL U 39 27.3 7.2 J BQL U 25.2 J 14 BQL U 9.0 100 335.0 04/29/2008 BQL U BQL U 181 BQL U BQL U 12.0 7.6 J 8.0 J BQL U BQL U 6.8 J BQL U BQL U BQL U 16.2 J 29.2 478.4 10/16/2008 BQL U BQL U 111 BQL U BQL U BQL U 3.3 J BQL U BQL U BQL U 2.1 J BQL U BQL U BQL U 5.0 U 1.3 J 1.20 04/14/2009 BQL U BQL U 92.8 J 0.17 J BQL U BQL U 4.0 J 0.41 J BQL U BQL U 2.0 J BQL U 0.14 J BQL U 0.56 J 4.7 J 5.97 10/08/2009 BQL U BQL U 74.5 J BQL U BQL U 0.69 J 6.5 J BQL U BQL U BQL U 5.6 J BQL U 0.13 J BQL U 0.58 J 5.8 J 7.70 04/20/2010 BQL U BQL U 101 BQL U BQL U 0.74 J 5.0 J 0.8 J BQL U BQL U 2.9 J BQL U BQL U BQL U 1.3 J 42.8 24.12 10/13/2010 2.6 U 2.7 U 96.4 J 0.10 U 0.86 J 0.76 J 8.9 J 1.1 J 4.0 U 0.070 U 4.3 J 3.8 U 0.10 U 0.050 U 0.2 U 92.8 10.19 04/19/2011 2.6 U 2.7 U 119 0.1 U 0.5 U 1.7 J 4.9 J 1.9 J 4 U 0.1 U 1.7 U 3.8 U 0.1 U 0.22 J 2.1 J 32.6 25.93 10/18/2011 5.0 U 5.0 U 118 1.0 U 1.0 U 5.0 U 6.6 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 5.0 U 10.0 U 32.87 04/24/2012 5.0 U 5.0 U 109 1.0 U 1.0 U 5.0 U 6.8 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 5.0 U 35.6 104.7010/16/2012 5.0 U 5.0 U 93.0 J 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.16 U 5.0 U 10 U 16.68 04/16/2013 5.0 U 5.0 U 96.5 J 1.4 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10 U 2.8410/15/2013 5.0 U 5.0 U 100 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10 U 5.974/16/2014 5.0 U 5.0 U 93.7 J 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10 U 4.3410/29/2014 3.8 U 2.5 U 97.9 J 0.5 U 0.50 U 2.5 U 2.5 U 2.5 U 2.5 U 0.10 U 2.5 U 5 U 2.5 U 0.025 U 2.5 U 5.6 U 7.91 4/28/2015 5.0 U 7.2 U 107 0.5 U 0.5 U 3.0 U 5.0 U 5.0 U 3.3 J 0.15 U 3.0 U 5.0 U 2.5 U 0.025 U 10 U 10 U 29.08 10/20/2015 0.5 U 8.6 U 97.9 J 0.5 U 0.5 U 3.0 U 0.5 U 5.0 U 2.0 U 0.10 U 3.0 U 5.0 U 2.5 U 0.200 U 2.66 J 10 U 6.68 04/13/2016 0.500 U 8.6 U 110 1.00 U 0.5 U 3.0 U 0.561 J 5.0 U 2.0 U 0.10 U 3.0 U 5.0 U 3.0 U 0.500 U 4.15 J 10 U 5.93 10/18/2016 0.800 U 8.6 U 106 0.100 U 0.5 U 4.3 J 0.662 J 5.0 U 2.0 U 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 1.73 J 5.20 U 6.00 04/04/2017 0.800 U 8.6 U 103 0.100 U 0.5 U 3.0 U 0.792 J 5.0 U 2.0 U 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 1.41 J 12.3 J 7.03 4/4/2017 (dissolved)0.800 U 8.6 U 98.1 J 0.100 U 0.5 U 3.0 U 0.813 J 11.7 3.3 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 1.32 J 18.8 J NA 04/05/2007 BQL U BQL U 230 BQL U BQL U 1.1 J 1.8 J BQL U BQL U BQL U 8.7 J BQL U BQL U 6.6 J 20 11.93 10/10/2007 BQL U 4 J 269 BQL U BQL U 6.2 J 7.2 J BQL U BQL U 5.6 J 8.7 J BQL U 3.1 J 19.1 J 38.5 51.52 04/29/2008 BQL U BQL U 145 BQL U BQL U 3.6 J 2 J BQL U BQL U 9.4 J BQL U BQL U BQL U 9.7 J 13.2 32.75 10/14/2008 BQL U BQL U 170 BQL U BQL U BQL U BQL U BQL U BQL U 7.2 J BQL U 0.54 J BQL U BQL U BQL U 1.61 04/16/2009 BQL U BQL U 110 0.15 J BQL U BQL U 2.0 J BQL U BQL U BQL U BQL U BQL U 0.14 J BQL U 0.37 J 1 J 3.84 10/08/2009 BQL U BQL U 171 BQL U BQL U BQL U BQL U BQL U BQL U 8.2 J BQL U 0.44 J BQL U 1.1 J 16.7 0.89 04/21/2010 BQL U 6.1 J 172 BQL U BQL U 3.1 J 2 J BQL U BQL U 3.6 J BQL U BQL U BQL U 17.9 J 21.0 84.10 10/14/2010 2.6 U 2.7 U 114 0.10 U 0.5 U 1.5 J 0.36 J 4.0 U 0.070 U 1.7 U 3.8 U 0.10 U 0.050 U 1.5 J 78.4 43.65 04/21/2011 2.6 U 2.7 U 130 0.1 U 0.5 U 1.4 J 1.3 J 4 U 0.1 U 1.7 U 3.8 U 0.1 U 0.12 J 5.1 J 39.5 48.14 10/19/2011 5.0 U 5.0 U 117 1.0 U 1 U 5.0 U 9.0 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 5 U 10 U 44.66 04/24/2012 5.0 U 5.0 U 131 1.0 U 1 U 5.0 U 6.7 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 5 U 72.6 47.8210/16/2012 5.0 U 5.0 U 124 1.0 U 1 U 5.0 U 7.7 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.16 U 5 U 10 U 6.17 04/16/2013 5.0 U 5.0 U 115 1.4 1 U 5.0 U 9.9 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 17.92 10/15/2013 5.0 U 5.0 U 236 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.1 U 9.8 J 10.0 U 5.0 U 0.025 U 5 U 14.5 4.60 4/16/2014 5.0 U 5.0 U 87.6 J 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.10 U 5.0 U 10.0 U 5.0 U 0.037 J 5 U 10 U 12.07 10/29/2014 3.8 U 2.5 U 115 0.50 U 0.5 U 2.5 U 5.3 J 2.5 U 2.5 U 0.1 U 2.5 U 5.0 U 2.5 U 0.025 U 2.5 U 6.5 J 5.614/28/2015 5.0 U 7.2 U 103 0.5 U 0.8 J 3.0 U 5.0 U 5.0 U 2.0 U 0.15 U 3.0 U 5.0 U 2.5 U 0.200 U 10 U 10 U 27.96 10/20/2015 0.500 U 8.6 U 94.3 J 0.5 U 0.5 U 3.0 U 4.53 J 5.0 U 2.0 U 0.1 U 3.0 U 5.0 U 3.0 U 0.200 U 8.07 J 10 U 42.15 04/12/2016 0.500 U 8.6 U 124 1.0 U 0.5 U 3.0 U 3.65 J 5.4 J 2.0 U 0.1 U 3.0 U 5.0 U 3.0 U 0.500 U 5.57 J 10 U 17.8 10/19/2016 0.800 U 8.6 U 97.8 J 0.10 U 0.5 U 3.4 J 5.0 U 4.3 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 9.01 J 5.20 U 54.8 04/03/2017 0.800 U 8.6 U 81.4 J 0.10 U 0.5 U 4.9 J 3.18 J 5.0 U 2.0 U 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 13.4 J 5.20 U 65.4 4/3/2017 (dissolved)0.800 U 8.6 U 64.5 J 0.10 U 0.5 U 3.0 U 1.58 J 5.0 U 2.3 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 1.6 J 14.1 J NA 7440-48-4 53 Cobalt 1 4 ug/L 7440-43-9 34 Cadmium 2 0.15 ug/L 7440-62-2 209 Vanadium 0.3 NE ug/L MW-01 MW-02 33.2 12.3 30.0 53.1 11.0 18.1 26.5 38.3 15.1 10.7 42.1 7.64 34 72.3 Madison County Operating Solid Waste Facility June 2017 Page 1 of 6 Table 1 Historical Analytical Results, April 2007 - Current CAS Number 7440-36-0 7440-38-2 7440-39-3 7440-41-7 7440-47-3 7440-50-8 7439-92-1 7439-97-6 7440-02-0 7782-49-2 7440-22-4 7440-28-0 7440-66-6 SW330 Solid Waste Section ID 13 14 15 23 51 54 131 132 152 183 184 194 213 330 Parameter Name Antimony Arsenic Barium Beryllium Chromium Copper Lead Mercury Nickel Selenium Silver Thallium Zinc Turbidity 2L or IMAC (Groundwater)1 10 700 4 10 1,000 15 1 100 20 20 0.2 1,000 NA 2B (Surface Water)640 10 200,000 6.5 35 2.7 0.54 0.012 16 5 0.06 0.47 36 25 WELL ID DATE ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L NTU 7440-48-4 53 Cobalt 1 4 ug/L 7440-43-9 34 Cadmium 2 0.15 ug/L 7440-62-2 209 Vanadium 0.3 NE ug/L 04/05/2007 BQL U BQL U 250 BQL U 0.5 U 8 J 2.3 J BQL U BQL U 6.2 J 27 BQL U 5.2 J 13 J 42 241.3 10/10/2007 BQL U 4 J 274 BQL U 0.5 U 9.8 J 3.2 J BQL U 0.2 10.4 J 23 BQL U 5.2 J 15.5 J 42.3 295.1 04/29/2008 BQL U BQL U 216 BQL U 0.76 J 1.3 J BQL U BQL U BQL U 3.1 J 7.2 J BQL U 0.054 J BQL U 25.3 240.2 10/14/2008 BQL U BQL U 198 BQL U 0.5 U BQL U BQL U BQL U BQL U 4.2 J 4.7 J 1.2 J BQL U BQL U 9.8 J 19.3 04/16/2009 BQL U BQL U 214 0.19 J 0.5 U BQL U BQL U BQL U BQL U 3.7 J 4.5 J 0.37 J BQL U 0.47 J BQL U 3.22 10/08/2009 BQL U BQL U 216 BQL U 0.5 U BQL U BQL U BQL U BQL U 4.6 J BQL U 0.87 J BQL U 0.33 J BQL U 6.95 04/20/2010 BQL U 4.9 J 242 BQL U 0.5 U BQL U BQL U BQL U BQL U 3.4 J BQL U BQL U 0.066 J 0.59 J 46.2 7.20 10/13/2010 2.6 U 2.7 U 236 0.10 U 0.5 U 1.2 J 0.30 U 4.0 U 0.070 U 1.7 U 3.8 U 0.10 U 0.050 U 0.2 U 115 95.83 04/19/2011 2.6 U 2.7 J 260 0.1 U 0.5 U 0.4 U 1.8 J 4.0 U 0.1 U 1.7 U 3.8 U 0.20 J 0.14 J 0.2 U 78.3 162.0 10/18/2011 5.0 U 5.0 U 263 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5 U 10 U 5 U 0.05 U 5.0 U 10 U 125.5 04/24/2012 5.0 U 5.0 U 258 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.062 J 5.0 U 55.2 454.210/16/2012 5.0 U 5.0 U 225 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.16 U 5.0 U 10 U 26.49 04/17/2013 5.0 U 5.0 U 238 1.3 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.069 J 5.0 U 10 U 5.9210/15/2013 5.0 U 5.0 U 246 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.068 J 5.0 U 10 U 2.854/16/2014 7.1 5.0 U 248 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.10 U 5.0 U 10.0 U 5.0 U 0.068 J 5.0 U 10 U 0.0010/30/2014 3.8 U 2.5 U 233 0.50 U 0.5 U 2.5 U 2.5 U 2.7 J 0.10 U 2.5 U 5.0 U 2.5 U 0.046 J 2.5 U 7.6 U 18.58 4/29/2015 5.0 U 7.2 U 223 0.5 U 0.5 U 3.7 J 5.0 U 6.7 J 0.15 U 3.0 U 11.5 2.5 U 0.200 U 10 U 10.4 32.87 10/20/2015 5.0 U 8.60 U 188 0.5 U 0.5 U 3.0 U 5.0 U 10.0 U 0.10 U 3.0 U 11.1 3.0 U 0.200 U 1.76 J 10 U 4.78 04/13/2016 0.500 U 8.6 U 233 1.00 U 3.0 U 5.0 U 2.0 U 0.10 U 4.6 J 5.0 U 3.0 U 0.500 U 3.17 J 10 U 9.07 10/19/2016 0.800 U 8.6 U 218 0.10 U 3.6 J 5.0 U 2.0 U 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 1.41 J 5.20 U 99.8 04/04/2017 0.800 U 8.6 U 193 0.10 U 0.5 U 4.3 J 5.0 U 2.0 U 0.10 U 4.2 J 5.0 U 3.0 U 0.800 U 1.12 J 5.20 U 17.6 4/4/2017 (dissolved)0.800 U 8.6 U 194 0.10 U 0.5 U 4.3 J 5.2 J 5.6 J 0.10 U 3.8 J 5.0 U 3.0 U 0.800 U 1.19 J 14.1 J NA 04/05/2007 BQL U BQL U 120 BQL U BQL U BQL U 0.6 U BQL U BQL U 0.084 J BQL U BQL U BQL U BQL U 6.4 J 6.1 J 12.14 10/10/2007 BQL U BQL U 154 BQL U BQL U 6.5 J 1.3 J 1.9 J BQL U BQL U 4.8 J BQL U BQL U BQL U 12.9 J 18.8 41.90 04/29/2008 BQL U BQL U 121 BQL U BQL U BQL U 0.88 J BQL U BQL U BQL U BQL U BQL U 0.21 J BQL U 4.0 J 7.4 J 13.22 10/14/2008 BQL U BQL U 129 BQL U BQL U 0.47 J 2.8 J BQL U BQL U BQL U BQL U BQL U BQL U BQL U 5.0 J BQL U 9.2 04/15/2009 BQL U BQL U 125 0.12 J BQL U BQL U 1.4 J BQL U BQL U BQL U BQL U BQL U 0.24 J BQL U 4.5 J 0.42 J 0.25 10/08/2009 BQL U BQL U 122 BQL U BQL U 0.87 J 0.6 U BQL U BQL U BQL U 1.9 J BQL U 0.2 J BQL U 5.5 J 1.5 J 6.38 04/20/2010 BQL U BQL U 133 BQL U BQL U 0.94 J 0.6 U 0.66 J BQL U BQL U BQL U BQL U BQL U BQL U 4.4 J 2 J 0.00 10/13/2010 2.6 U 2.7 U 126 0.10 U 0.5 U 0.99 J 0.6 U 0.30 U 4.0 U 0.070 U 1.7 U 3.8 U 0.10 U 0.050 U 2.8 J 0.40 U 0.23 04/19/2011 2.6 U 2.7 U 132 0.1 U 0.5 U 1.1 J 3.3 J 0.43 J 4 U 0.1 U 1.7 U 3.8 U 0.16 J 0.065 J 3.2 J 8.2 J 0.00 10/18/2011 5.0 U 5.0 U 143 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5 U 10 U 5 U 0.05 U 5.0 U 10 U 0.00 04/24/2012 5.0 U 5.0 U 136 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 5.0 U 10 U 0.00 10/16/2012 5.0 U 5.0 U 132 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.16 U 5.0 U 10 U 0.00 04/17/2013 5.0 U 5.0 U 138 1.3 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 19.1 0.00 10/15/2013 5.0 U 5.0 U 136 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 16.5 0.00 4/16/2014 5.0 U 5.0 U 136 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10 U 0.90 10/30/2014 3.8 U 2.5 U 142 0.50 U 0.5 U 2.5 U 2.5 U 2.5 U 2.5 U 0.1 U 2.5 U 5.0 U 2.5 U 0.0025 U 3.8 J 5.3 J 5.75 4/29/2015 5.0 U 7.2 U 145 0.5 U 0.5 U 3.0 U 5 U 5.0 U 3.0 J 0.15 U 3.0 U 5.0 U 2.5 U 0.20 U 10 U 27.9 14.61 10/20/2015 5.0 U 8.60 U 151 0.5 U 0.5 U 3.0 U 5 U 5.0 U 2.2 J 0.1 U 3.0 U 5.0 U 3.0 U 0.20 U 6.34 J 10 U 3.55 04/13/2016 0.500 U 8.6 U 151 1.00 U 0.5 U 3.0 U 0.5 U 5.0 U 2.9 J 0.10 U 3.0 U 5.0 U 3.0 U 0.50 U 8.08 J 10 U 5.28 10/19/2016 0.800 U 8.6 U 146 0.10 U 0.5 U 3.0 U 0.1 U 5.0 U 2.1 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 5.98 J 5.20 U 6.01 04/04/2017 0.800 U 8.6 U 149 0.10 U 0.5 U 3.0 U 0.1 U 5.0 U 2.0 U 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 4.9 J 5.20 U 2.26 4/4/2017 (dissolved)0.800 U 8.6 U 152 0.10 U 0.5 U 3.0 U 0.1 U 12.2 5.7 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 4.76 J 13.7 J NA MW-03 MW-04 34 105 77.5 86.7 88.9 78 122 138 121 139 114 85.2 77.8 140 161 114 60.3 99.8 2.3 5.9 77.9 92.6 85.7 84.4 Madison County Operating Solid Waste Facility June 2017 Page 2 of 6 Table 1 Historical Analytical Results, April 2007 - Current CAS Number 7440-36-0 7440-38-2 7440-39-3 7440-41-7 7440-47-3 7440-50-8 7439-92-1 7439-97-6 7440-02-0 7782-49-2 7440-22-4 7440-28-0 7440-66-6 SW330 Solid Waste Section ID 13 14 15 23 51 54 131 132 152 183 184 194 213 330 Parameter Name Antimony Arsenic Barium Beryllium Chromium Copper Lead Mercury Nickel Selenium Silver Thallium Zinc Turbidity 2L or IMAC (Groundwater)1 10 700 4 10 1,000 15 1 100 20 20 0.2 1,000 NA 2B (Surface Water)640 10 200,000 6.5 35 2.7 0.54 0.012 16 5 0.06 0.47 36 25 WELL ID DATE ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L NTU 7440-48-4 53 Cobalt 1 4 ug/L 7440-43-9 34 Cadmium 2 0.15 ug/L 7440-62-2 209 Vanadium 0.3 NE ug/L 04/05/2007 BQL U BQL U 650 0.30 J BQL U 87 57 BQL U 0.077 J 62 20 BQL U 9.1 100 375.6 10/10/2007 2.6 J BQL U 807 BQL U BQL U 121 74.1 BQL U BQL U 91.1 17.4 BQL U 18.1 132 994.1 04/29/2008 BQL U BQL U 764 BQL U 111 65.8 BQL U BQL U 81.2 BQL U BQL U BQL U 130 448.4 10/17/2008 BQL U BQL U 79.5 J BQL U BQL U 3.4 J 4.8 J 0.48 J BQL U BQL U 4 J 4.9 J BQL U BQL U 5.4 J 4.2 J 18.5 04/14/2009 BQL U BQL U 65.4 J 0.16 J BQL U 0.72 J 2.6 J BQL U BQL U BQL U 1.9 J BQL U 0.26 J BQL U 4.3 J 1.1 J 0.00 10/09/2009 BQL U BQL U 72.8 J BQL U BQL U 1.1 J 0.6 U BQL U BQL U BQL U 4.8 J BQL U 0.21 J BQL U 4.2 J 0.46 J 0.08 04/21/2010 BQL U BQL U 95.0 J BQL U BQL U 3.3 J 1.8 J 1.3 J BQL U BQL U 5.8 J BQL U BQL U BQL U 4.8 J 44.1 0.00 10/14/2010 2.6 U 2.7 U 115 0.10 U 0.5 U 5.3 J 4.2 J 1.9 J 4.0 U 0.070 U 4.1 J 3.8 U 0.10 U 0.050 U 5.9 J 126 11.81 04/21/2011 2.6 U 2.7 U 135 0.1 U 0.5 U 6.2 J 3.8 J 4 U 0.1 U 4.8 J 3.8 U 0.1 U 0.05 U 7.7 J 26.4 13.07 10/19/2011 5.0 U 5.0 U 120 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5 U 10 U 5 U 0.05 U 5.3 J 10 U 3.50 04/24/2012 5.0 U 5.0 U 113 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 5 U 68.3 0.0010/17/2012 5.0 U 5.0 U 119 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.16 U 5 U 11.3 13.73 04/17/2013 5.0 U 5.0 U 109 1.3 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 12.9410/16/2013 5.0 U 5.0 U 115 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.2 J 10.0 U 5.0 U 0.025 U 5 U 10.4 5.794/17/2014 5.0 U 5.0 U 109 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.10 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 7.8110/30/2014 3.8 U 2.5 U 118 0.50 U 0.5 U 2.5 U 2.5 U 2.5 U 2.5 U 0.10 U 3.7 J 5.0 U 2.5 U 0.031 J 4.2 J 8.1 J 6.84 4/28/2015 5.0 U 7.2 U 114 0.5 U 0.5 U 3.0 U 5 U 5.0 U 3.1 J 0.15 U 3.0 U 5.0 U 2.5 U 0.20 U 10 U 10 U 13.13 10/20/2015 5.0 U 8.6 U 134 0.5 U 0.5 U 3.0 U 1.25 J 5.0 U 2.3 J 0.10 U 7.60 J 5.20 J 3.0 U 0.20 U 6.65 J 10 U 7.29 04/12/2016 0.500 U 8.6 U 132 1.00 U 0.9 J 3.0 U 0.824 J 5.0 U 3.3 J 0.10 U 4.5 J 5.0 U 3.0 U 0.500 U 7.69 J 10.7 J 4.31 10/19/2016 0.800 U 8.6 U 135 0.10 U 0.8 J 3.2 J 1.27 J 5.0 U 2.1 J 0.10 U 6.5 J 5.0 U 3.0 U 0.800 U 7.51 J 79.5 22.2 04/03/2017 0.800 U 8.6 U 133 0.10 U 0.5 U 3.0 U 0.731 J 5.0 U 2.0 U 0.102 J 5.6 J 5.0 U 3.0 U 0.800 U 5.04 J 5.75 J 4.35 4/3/2017 (dissolved)0.800 U 8.6 U 128 0.10 U 0.5 U 3.0 U 0.649 J 14.5 5.4 J 0.10 U 4.9 J 5.0 U 3.0 U 0.800 U 4.6 J 19.4 J NA 10/16/2008 3.7 J BQL U 406 0.32 J 0.5 U 10.6 9.8 J BQL U BQL U 44.2 J 8.3 J BQL U BQL U 80.9 >1000 04/16/2009 BQL U BQL U 137 1.1 0.55 J 4.6 J 3.5 J BQL U BQL U 14.4 BQL U 0.71 J BQL U 16.2 J 39.4 118.6 10/09/2009 BQL U BQL U 200 0.22 J 0.5 U 6.0 J 9.6 J 3.9 J BQL U BQL U 22.1 J BQL U 0.25 J BQL U 22.5 J 29.3 287.3 04/21/2010 5.2 J 4.4 J 1210 2.0 46.7 27.8 10.8 BQL U 162 4 J BQL U BQL U 252 >1,100 10/14/2010 2.6 U 2.7 U 508 0.2 J 0.5 U 18.2 9.4 J 4.0 U 0.070 U 55.4 3.8 U 0.10 U 0.062 J 126 537.8 04/19/2011 2.6 U 2.7 U 594 0.38 J 0.5 U 23.7 14.9 4 U 0.1 U 78.0 3.8 U 0.1 U 0.063 J 138 532.40 10/19/2011 5.0 U 5.0 U 144 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 0.1 U 11.6 J 10.0 U 5.0 U 0.05 U 13.1 J 22.8 105.9 04/24/2012 5.0 U 5.0 U 87.9 J 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 6.4 J 10.0 U 5.0 U 0.05 U 7.7 J 25.5 90.610/17/2012 5.0 U 5.0 U 96.0 J 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 6.7 J 10.0 U 5.0 U 0.16 U 9.1 J 18.4 90.3 04/16/2013 5.0 U 5.0 U 38.5 J 1.4 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 32.2310/16/2013 5.0 U 5.0 U 35.0 J 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 19.144/17/2014 5.0 U 5.0 U 34.5 J 1.0 U 1.0 U 5.0 U 5 U 5.0 U 5.0 U 0.10 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 19.7810/29/2014 3.8 U 2.5 U 38.0 J 0.50 U 0.5 U 2.5 U 2.5 U 2.5 U 2.5 U 0.10 U 2.5 U 5.0 U 2.5 U 0.025 U 2.5 U 19.1 16.94 4/28/2015 5.0 U 7.2 U 72.6 J 0.5 U 0.5 U 3.0 U 5 U 5.0 U 3.5 J 0.15 U 5.7 J 5.0 U 2.5 U 0.2 U 10 U 10.7 88.89 10/20/2015 5.0 U 8.60 U 29.0 J 0.5 U 0.5 U 3.0 U 5 U 5.0 U 2.0 U 0.10 U 3.00 U 5.0 U 3.0 U 0.2 U 3.09 J 10 U 0.86 04/12/2016 0.500 U 8.6 U 26.8 J 1.00 U 0.5 U 3.0 U 0.5 U 5.0 U 2.0 U 0.500 U 3.0 U 5.0 U 3.0 U 0.50 U 4.66 J 10 U 4.95 10/18/2016 0.800 U 8.6 U 28.4 J 0.10 U 0.5 U 3.0 U 0.159 J 5.0 U 2.0 U 0.100 U 3.0 U 5.0 U 3.0 U 0.800 U 2.59 J 5.20 U 6.77 04/04/2017 0.800 U 8.6 U 25.4 J 0.10 U 0.5 U 3.0 U 0.1 U 5.0 U 2.0 U 0.100 U 3.0 U 5.0 U 3.0 U 0.800 U 1.52 J 5.2 U 2.04 4/4/2017 (dissolved)0.800 U 8.6 U 24.9 J 0.10 U 0.5 U 3.0 U 0.1 U 12.3 4.3 J 0.100 U 3.0 U 5.0 U 3.0 U 0.800 U 1.63 J 17.3 J NA MW-06R 58.5 10.7 MW-05 66.7 22 54.5 10.9 31.3 13.6 151 63.2 2.6 1.9 74 108 93.9 61.2 179 95.9 59.8 Madison County Operating Solid Waste Facility June 2017 Page 3 of 6 Table 1 Historical Analytical Results, April 2007 - Current CAS Number 7440-36-0 7440-38-2 7440-39-3 7440-41-7 7440-47-3 7440-50-8 7439-92-1 7439-97-6 7440-02-0 7782-49-2 7440-22-4 7440-28-0 7440-66-6 SW330 Solid Waste Section ID 13 14 15 23 51 54 131 132 152 183 184 194 213 330 Parameter Name Antimony Arsenic Barium Beryllium Chromium Copper Lead Mercury Nickel Selenium Silver Thallium Zinc Turbidity 2L or IMAC (Groundwater)1 10 700 4 10 1,000 15 1 100 20 20 0.2 1,000 NA 2B (Surface Water)640 10 200,000 6.5 35 2.7 0.54 0.012 16 5 0.06 0.47 36 25 WELL ID DATE ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L NTU 7440-48-4 53 Cobalt 1 4 ug/L 7440-43-9 34 Cadmium 2 0.15 ug/L 7440-62-2 209 Vanadium 0.3 NE ug/L 04/05/2007 BQL U 62 1,900 12 0.5 U 190 0.6 U 57 32 0.10 J 59 15 BQL U BQL U 480 784.1 10/10/2007 BQL U 91.6 2,320 2.6 0.7 J 231 71.6 42.9 0.13 J 79.2 BQL U BQL U 9.2 583 208.2 04/29/2008 BQL U 68.6 2,160 1.6 211 62.0 27.8 BQL U 87.5 BQL U BQL U BQL U 552 383.2 10/20/2008 BQL U BQL U 163 BQL U 0.5 U 4.6 J 5.1 J 0.41 J BQL U BQL U 2.1 J BQL U BQL U BQL U 7.5 J 13.2 219 04/16/2009 BQL U BQL U 140 0.31 J 0.88 J 4.7 J 4.4 J 1.2 J BQL U BQL U 2.4 J BQL U 0.22 J BQL U 6.3 J 9.6 J 101.01 10/08/2009 BQL U BQL U 137 0.3 J 0.5 U 5.2 J 0.6 U 0.82 J BQL U BQL U 3.1 J BQL U 0.25 J BQL U 7.5 J 13.5 86.63 04/20/2010 BQL U 25.4 782 5.9 0.5 U 117 25.4 23.4 BQL U 55.4 BQL U BQL U BQL U 270 1,100 10/13/2010 2.6 U 2.9 J 331 0.82 J 0.5 U 26.2 5.4 J 4.0 U 0.070 U 9.1 J 3.8 U 0.10 U 0.059 J 80.9 268.2 04/21/2011 2.6 U 7.1 J 336 1.2 0.5 U 33.0 8.6 J 4 U 0.1 U 11.0 J 3.8 U 0.1 U 0.065 J 95.0 354.6 10/19/2011 5.0 U 5.0 U 182 1.0 U 1.0 U 9.0 J 5.5 J 5.0 U 5.0 U 0.1 U 5 U 10 U 5 U 0.05 U 12 J 21.5 87.79 04/24/2012 5.0 U 5.0 U 126 1.0 U 1.0 U 6.0 J 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 7.9 J 36.6 73.1310/16/2012 5.0 U 5.0 U 180 1.0 U 1.0 U 9.5 J 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.16 U 14.1 J 26.2 138.2 04/16/2013 5.0 U 5.0 U 103 1.6 1.0 U 5 U 6.2 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10.3 74.4010/15/2013 5.0 U 5.0 U 142 1.0 U 1.0 U 5.5 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 J 9.2 J 21.3 134.14/16/2014 5.0 U 5.0 U 173 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.10 U 5.0 U 10.0 U 5.0 U 0.037 J 5.4 J 19.5 164.8010/29/2014 3.8 U 16.5 678 2.9 53.6 2.5 U 15.4 8.1 J 0.10 U 17.6 J 5.0 U 2.5 U 0.13 J 131 1100.00 4/28/2015 5.0 U 7.2 U 152 0.5 U 0.5 U 3.7 J 5.0 U 5.0 U 3.2 J 0.15 U 3.0 U 5.0 U 2.5 U 0.200 U 11 J 17.9 173.50 10/20/2015 5.0 U 8.60 U 210 0.5 U 5.90 J 3.42 J 5.0 U 2.0 U 0.10 U 5.50 J 5.0 U 3.0 U 0.200 U 10.5 J 11.9 J 126.2 04/12/2016 0.50 U 8.6 U 167 1.00 U 6.4 J 1.9 J 7.3 J 3.6 J 0.10 U 3.0 U 5.0 U 3.0 U 0.500 U 11.7 J 23.2 J 145 10/18/2016 0.800 U 9.0 J 242 0.506 J 14.2 4.06 J 5.0 U 5.8 J 0.10 U 6.9 J 5.0 U 3.0 U 0.800 U 20.3 J 44.1 179 04/03/2017 0.800 U 8.6 U 178 0.301 J 0.5 U 7.6 J 2.25 J 5.0 U 2.0 U 0.10 U 3.8 J 5.0 U 3.0 U 0.800 U 11 J 12.5 J 108 4/3/2017 (dissolved)0.800 U 8.6 U 97.6 J 0.1 U 0.5 U 3.0 U 0.1 U 10.3 4.7 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 1.69 J 18.1 J NA 04/05/2007 BQL U BQL U 960 3.0 0.5 U 43 160 6.1 J 0.094 J 150 14 BQL U 28 370 364.8 10/10/2007 BQL U 8.1 J 693 BQL U 0.5 U 27.2 111 BQL U BQL U 119 23.3 BQL U 27.1 253 498.3 04/29/2008 BQL U BQL U 82.8 J BQL U 0.5 U 3.5 J 7.2 J BQL U BQL U 9.9 J BQL U BQL U 0.052 J 25.5 552.4 10/14/2008 BQL U BQL U 47.8 J BQL U 0.5 U 2.6 J 5.1 J 2.3 J BQL U BQL U 6.1 J BQL U BQL U BQL U 11.9 J 2.1 J 63.5 04/14/2009 BQL U BQL U 32.6 J 0.11 J 0.5 U 1.1 J 3.3 J 1.1 J BQL U BQL U 2.3 J BQL U 0.29 J BQL U 4.7 J 2.4 J 8.97 10/08/2009 BQL U BQL U 34.4 J BQL U 0.5 U 1.8 J 0.6 U 0.81 J BQL U BQL U 5.4 J BQL U 0.17 J BQL U 6.5 J 1.4 J 6.58 04/20/2010 3.1 J BQL U 51.4 J BQL U 0.5 U 2.8 J 0.91 J 1.4 J BQL U BQL U BQL U BQL U 0.42 J BQL U 6.9 J 62.8 33.84 10/13/2010 2.6 U 2.7 U 51.9 J 0.10 U 0.5 U 4.3 J 3.4 J 4.0 U 0.070 U 7.2 J 3.8 U 0.10 U 0.050 U 11.1 J 114 31.49 04/19/2011 2.6 U 2.7 U 280 0.1 U 0.5 U 22.2 39.2 4 U 0.1 U 44.8 J 3.8 U 0.1 U 0.081 J 150 267.2 10/18/2011 5.0 U 5.0 U 46.8 J 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 7.4 J 14.6 34.28 04/24/2012 5.0 U 5.0 U 44.1 J 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 5.4 J 140 17.9710/16/2012 5.0 U 5.0 U 38.2 J 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.16 U 6.4 J 12.7 34.57 04/16/2013 5.0 U 5.0 U 39.3 J 1.3 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10 U 22.43 10/15/2013 5.0 U 5.0 U 30.9 J 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.2 J 10 U 8.41 4/16/2014 5.0 U 5.0 U 28.6 J 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.10 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10 U 3.89 10/29/2014 3.8 U 2.5 U 38.3 J 0.50 U 0.5 U 3.0 J 2.5 U 2.9 J 2.5 U 0.10 U 2.5 U 5.0 U 2.5 U 0.025 U 6.5 J 8.7 J 29.24/28/2015 5.0 U 7.2 U 29.5 J 0.5 U 0.5 U 3.0 U 5.0 U 5.0 U 2.6 J 0.15 U 3.0 U 5.0 U 2.5 U 0.20 U 12.5 J 10 U 4.12 10/20/2015 5.0 U 8.6 U 31.7 J 0.5 U 0.5 U 3.0 U 5.0 U 5.0 U 2.00 U 0.10 U 3.0 U 5.0 U 3.0 U 0.20 U 5.37 J 10 U 0 04/12/2016 0.500 U 8.6 U 31 J 1.00 U 0.5 U 3.0 U 0.5 U 5.0 U 2.3 J 0.100 U 3.0 U 5.0 U 3.0 U 0.500 U 7.48 J 10 U 2.81 10/18/2016 0.800 U 8.6 U 33.5 J 0.10 U 0.5 U 3.0 U 1.14 J 5.0 U 2.7 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 6.54 J 5.20 U 9.31 04/03/2017 0.800 U 8.6 U 31.6 J 0.10 U 0.5 U 3.0 U 0.288 J 5.0 U 2.0 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 4.02 J 7.84 J 7.37 4/3/2017 (dissolved)0.800 U 8.6 U 28.5 J 0.10 U 0.5 U 3.0 U 0.1 U 11.7 6.8 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 4.03 J 17.9 J NA MW-07R MW-08 81.5 64.9 63.0 24.5 19.8 13.4 64 130 12.3 10.9 61.7 6.5 1.6 3.3 1.5 13.2 110 26.1 280 303 400 80.2 47.6 33.4 170 307 351 Madison County Operating Solid Waste Facility June 2017 Page 4 of 6 Table 1 Historical Analytical Results, April 2007 - Current CAS Number 7440-36-0 7440-38-2 7440-39-3 7440-41-7 7440-47-3 7440-50-8 7439-92-1 7439-97-6 7440-02-0 7782-49-2 7440-22-4 7440-28-0 7440-66-6 SW330 Solid Waste Section ID 13 14 15 23 51 54 131 132 152 183 184 194 213 330 Parameter Name Antimony Arsenic Barium Beryllium Chromium Copper Lead Mercury Nickel Selenium Silver Thallium Zinc Turbidity 2L or IMAC (Groundwater)1 10 700 4 10 1,000 15 1 100 20 20 0.2 1,000 NA 2B (Surface Water)640 10 200,000 6.5 35 2.7 0.54 0.012 16 5 0.06 0.47 36 25 WELL ID DATE ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L NTU 7440-48-4 53 Cobalt 1 4 ug/L 7440-43-9 34 Cadmium 2 0.15 ug/L 7440-62-2 209 Vanadium 0.3 NE ug/L 04/05/2007 BQL U BQL U 2,300 2.5 0.5 U BQL U 0.6 U 110 4.2 J 0.089 J 54 9.5 J BQL U 48 470 1100 10/10/2007 BQL U 3 J 1,010 BQL U 0.5 U BQL U 40 BQL U BQL U 23.2 J 20.5 BQL U 25.2 174 718.7 04/30/2008 BQL U BQL U 1,440 BQL U BQL U 56.8 BQL U BQL U 34.7 J BQL U BQL U BQL U 282 439.7 10/17/2008 BQL U BQL U 155 BQL U 0.5 U 0.46 J 5.4 J 0.44 J BQL U BQL U 8.9 J BQL U BQL U BQL U 5.00 J 15.5 32.9 04/16/2009 BQL U BQL U 143 0.11 J 0.8 J 0.43 J 4.0 J 5.0 J BQL U BQL U 2.1 J BQL U 0.31 J BQL U 3.70 J 8.2 J 23.09 10/09/2009 BQL U BQL U 120 BQL U 0.5 U 0.67 J 0.6 U BQL U BQL U BQL U 3.8 J BQL U 0.14 J BQL U 2.00 J 3 J 2.28 04/21/2010 BQL U BQL U 184 BQL U 0.5 U 2.1 J 3.3 J 2.3 J BQL U BQL U 2.2 J BQL U 0.46 J BQL U 8.90 J 23.7 72.35 10/14/2010 2.6 U 2.7 J 951 0.51 J 0.5 U 21.0 37.9 7.3 J 0.070 U 27.6 J 3.8 U 0.10 U 0.22 J 173 436.8 04/19/2011 2.6 U 2.7 U 345 0.1 U 0.5 U 5.5 J 11.4 4 U 0.1 U 4.9 J 3.8 U 0.1 U 0.056 J 74.3 223.1 10/18/2011 5.0 U 5.0 U 199 1.0 U 1.0 U 5.0 U 5.8 J 5.0 U 5.0 U 0.1 U 5 U 10 U 5 U 0.05 U 8.20 J 13.2 24.49 04/24/2012 5.0 U 5.0 U 171 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 8.4 J 10.0 U 5.0 U 0.05 U 5.0 U 63.1 24.2910/17/2012 5.0 U 5.0 U 153 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.16 U 5.0 U 10 U 16.92 04/17/2013 5.0 U 5.0 U 148 1.4 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10 U 19.0710/16/2013 5.0 U 5.0 U 166 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10 U 6.824/17/2014 5.0 U 5.0 U 167 1.0 U 1.0 U 5.0 U 5.0 U 5.0 U 5.0 U 0.10 U 5.0 U 10.0 U 5.0 U 0.025 U 5.0 U 10 U 20.1910/30/2014 3.8 U 2.5 U 163 0.50 U 0.5 U 2.5 U 2.5 U 2.5 U 2.5 U 0.1 U 2.5 U 5.0 U 2.5 U 0.025 U 2.5 U 9.7 J 17.78 4/29/2015 5.0 U 7.2 U 450 0.5 U 0.5 U 4.1 J 9.4 J 8.5 J 7.9 J 0.15 U 3.0 U 5.5 J 2.5 U 0.025 U 28.0 36.72 10/20/2015 5.0 U 8.60 U 143 0.5 U 0.5 U 3.0 U 0.5 U 5.0 U 2.00 U 0.100 U 3.0 U 5.0 U 3.0 U 0.025 U 3.87 J 10 U 0.11 04/13/2016 0.500 U 8.6 U 170 1.00 U 0.5 U 3.0 U 0.5 U 6.7 J 2.6 J 0.100 U 3.0 U 5.0 U 3.0 U 0.500 U 6.42 J 10 U 4.23 10/19/2016 0.800 U 8.6 U 146 0.10 U 0.5 U 3.0 U 0.235 J 5.0 U 2.2 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 2.65 J 5.20 U 4.89 04/04/2017 0.800 U 8.6 U 159 0.10 U 0.5 U 3.0 U 0.133 J 5.0 U 2.0 U 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 2.02 J 5.20 U 6.34 4/4/2017 (dissolved)0.800 U 8.6 U 155 0.10 U 0.5 U 3.0 U 0.1 U 13.4 6.3 J 0.10 U 3.0 U 5.0 U 3.0 U 0.800 U 2.28 J 18.7 J NA SURFACE WATER SAMPLES 04/05/2007 2.6 U 2.7 U 38 J 1.0 U 1 U 10 U 10 U 10 U 10 U 0.12 J 50 U 10 U 10 U 5.5 U 0.66 J 15 6.14 10/11/2007 BQL U 3.4 J 234 BQL U BQL U 6.2 J 5.9 J BQL U BQL U 4.8 J 7.9 J BQL U BQL U 19.1 J 67.7 16.98 04/29/2008 BQL U BQL U 58.9 J BQL U BQL U 1.4 J 2.4 J BQL U BQL U BQL U BQL U BQL U BQL U BQL U 2.2 J 13.1 106.1 10/14/2008 BQL U BQL U 85.2 J BQL U BQL U 1.9 J 7 J 0.64 J BQL U BQL U 2.6 J BQL U BQL U BQL U 6 J 4.8 J 29.5 04/15/2009 BQL U BQL U 52.9 J 0.18 J BQL U 0.78 J 2.8 J 0.54 J BQL U BQL U BQL U BQL U 0.14 J BQL U 1.9 J 2.9 J 8.22 10/09/2009 BQL U BQL U 116 BQL U BQL U 0.74 J BQL U BQL U BQL U 2.5 J BQL U 0.11 J BQL U 2.8 J 14.8 227.6 04/20/2010 3.5 J 2.8 J 95.7 J 0.19 J BQL U 10 6.2 J 6.3 J BQL U BQL U 3.8 J BQL U 0.32 J BQL U 13.2 J 29.2 108.5 10/13/2010 2.6 U 2.7 U 210 0.10 U 0.5 U 0.78 J 1.3 J 4.0 U 0.070 U 7.5 J 3.8 U 0.10 U 0.050 U 8.6 J 10.0 122.9 04/19/2011 2.6 U 2.7 U 48.4 J 0.1 U 0.5 U 0.62 J 1.5 J 1.5 J 4 U 0.1 U 1.7 U 3.8 U 0.1 U 0.05 U 1.1 J 8.2 J 0.92 10/18/2011 5.0 U 5.0 U 208 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5 U 0.05 U 14.8 J 23.5 203.0 04/24/2012 5.0 U 5.0 U 156 1.0 U 1 U 6.6 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 14.9 J 20.4 87.98 10/17/2012 5.0 U 7.9 J 771 2.4 1 U 52.6 30.2 29.5 0.1 U 28.1 J 10.0 U 5.0 U 0.16 U 130 NA 04/16/2013 5.0 U 5.5 J 58 J 1.5 1 U 5.0 U 7.3 J 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 13.23 10/16/2013 5.0 U 5.0 U 84.2 J 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5.6 J 10 66.47 4/17/2014 5.0 U 5.0 U 42.0 J 1.0 U 1 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 19.38 10/29/2014 3.8 U 2.5 U 2980 8.5 218 99.3 94.9 0.1 U 102 14.1 2.5 U 1.3 J 514 877.40 4/28/2015 5.0 U 7.2 U 70.3 J 0.5 U 0.5 U 3.0 U 5 U 5.0 U 3.4 J 0.15 U 3.0 U 5.0 U 2.5 U 0.20 U 10 U 10 U 4.33 10/20/2015 5.0 U 8.60 U 149 0.5 U 3.1 J 5.0 U 3.8 J 0.1 U 3.0 U 5.0 U 3.0 U 0.2 U 11.9 J 12.2 J 49.11 04/12/2016 0.500 U 8.6 U 50.3 J 1.00 U 0.5 U 3.0 U 2.24 J 5.8 J 2.0 U 0.1 U 3.0 U 5.0 U 3.0 U 0.500 U 6.01 J 10 U 10.2 10/19/2016 0.800 U 8.6 U 48 J 0.100 U 0.5 U 3.0 U 2.22 J 5.0 U 2.0 U 0.1 U 3.0 U 5.0 U 3.0 U 0.800 U 3.54 J 5.20 U 97.1 04/04/2017 0.800 U 8.6 U 60.3 J 0.10 U 0.5 U 3.0 U 0.1 U 5.0 U 2.0 U 0.1 U 3.0 U 5.0 U 3.0 U 0.800 U 6.99 J 16.1 MW-09 SW-01 53.1 66.8 71.7 19.8 17.7 16.5 76.8 62.7 14.4 7.1 1.7 5.5 40.1 22.3 300 17.3 142 40.9 201 142 370 143 459 3.26 29.8 Madison County Operating Solid Waste Facility June 2017 Page 5 of 6 Table 1 Historical Analytical Results, April 2007 - Current CAS Number 7440-36-0 7440-38-2 7440-39-3 7440-41-7 7440-47-3 7440-50-8 7439-92-1 7439-97-6 7440-02-0 7782-49-2 7440-22-4 7440-28-0 7440-66-6 SW330 Solid Waste Section ID 13 14 15 23 51 54 131 132 152 183 184 194 213 330 Parameter Name Antimony Arsenic Barium Beryllium Chromium Copper Lead Mercury Nickel Selenium Silver Thallium Zinc Turbidity 2L or IMAC (Groundwater)1 10 700 4 10 1,000 15 1 100 20 20 0.2 1,000 NA 2B (Surface Water)640 10 200,000 6.5 35 2.7 0.54 0.012 16 5 0.06 0.47 36 25 WELL ID DATE ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L NTU 7440-48-4 53 Cobalt 1 4 ug/L 7440-43-9 34 Cadmium 2 0.15 ug/L 7440-62-2 209 Vanadium 0.3 NE ug/L 04/05/2007 2.6 U 2.7 U 58 J 1.0 U 1 U 10 U 10 U 10 U 10 U 0.079 J 50 U 14 10 U 5.5 U 25 U 8.2 J 13.85 10/10/2007 BQL U 3.6 J 138 BQL U BQL U BQL U 10 U 2.6 J BQL U BQL U BQL U 16.4 BQL U BQL U 4.8 J 37.9 42.08 04/29/2008 BQL U BQL U 75.5 J BQL U BQL U 3.2 J 5.5 J 1.5 J BQL U BQL U 3 J BQL U BQL U BQL U 9.4 J 18.3 103.4 10/14/2008 BQL U BQL U 58.7 J BQL U BQL U 1.1 J 4.3 J BQL U BQL U BQL U BQL U BQL U BQL U BQL U 7.5 J 0.9 J 64.2 04/14/2009 BQL U BQL U 50.8 J 0.14 J BQL U 0.45 J 3.4 J 0.41 J BQL U BQL U BQL U BQL U 0.18 J BQL U 2.4 J 7 J 19.78 10/08/2009 BQL U BQL U 65.0 J BQL U BQL U BQL U 1.2 J BQL U BQL U BQL U BQL U BQL U 0.16 J BQL U 2.4 J 2.7 J 14.91 04/20/2010 BQL U BQL U 78.2 J BQL U BQL U BQL U 0.42 J BQL U BQL U 4.1 J BQL U 0.37 J BQL U 3.7 J 6.7 J 36.63 10/13/2010 2.6 U 2.7 U 38.9 J 0.10 U 0.5 U 1.3 J 3.6 J 0.30 U 4.0 U 0.070 U 1.7 U 3.8 U 0.10 U 0.050 U 0.2 U 0.40 U 8.52 04/19/2011 2.6 U 2.7 U 71.9 J 0.1 U 0.5 U 1.6 J 7.3 J 1.5 J 4 U 0.1 U 1.7 U 3.8 U 0.1 U 0.05 U 6 J 14.9 0.00 10/18/2011 5.0 U 5.0 U 52.0 J 1.0 U 1 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 5 U 10 U 0.00 04/24/2012 5.0 U 5.0 U 93.9 J 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.05 U 6.5 J 10 U 116.10 10/16/2012 5.0 U 5.0 U 388 1.3 1 U 28.8 5 U 21.5 14.8 0.1 U 14.2 J 10.0 U 5.0 U 0.16 U 120 13.95 04/16/2013 5.0 U 5.0 U 54.7 J 1.4 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 13.1 11.78 10/15/2013 5.0 U 5.0 U 62.6 J 1.0 U 1 U 5.0 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 202.2 4/16/2014 5.0 U 5.0 U 36.7 J 1.0 U 1 U 5.0 U 5 U 5.0 U 5.0 U 0.1 U 5.0 U 10.0 U 5.0 U 0.025 U 5 U 10 U 12.92 10/29/2014 3.8 U 2.5 U 51.7 J 0.50 U 0.5 U 2.5 U 2.5 U 2.5 U 2.5 U 0.1 U 2.5 U 5.0 U 2.5 U 0.025 U 2.5 U 14 2.12 4/28/2015 5.0 U 7.2 U 49.4 J 0.5 U 0.5 U 3.0 U 5 U 5.0 U 2.8 J 0.15 U 3.0 U 5.0 U 2.5 U 0.20 U 10 U 10 U 15.17 10/20/2015 5.0 U 8.60 U 48.4 J 0.5 U 0.5 U 3.0 U 5 U 5.0 U 2.0 J 0.1 U 3.0 U 5.0 U 3.0 U 0.20 U 3.08 J 10 U 1.55 04/12/2016 0.500 U 8.6 U 54.3 J 1.0 U 0.5 U 3.0 U 0.761 J 6.5 J 2.0 U 0.1 U 3.0 U 5.0 U 3.0 U 0.500 U 5.24 J 10 U 6.37 10/18/2016 0.800 U 8.6 U 53.9 J 0.10 U 0.5 U 3.0 U 0.357 J 5.0 U 2.0 U 0.1 U 3.0 U 5.0 U 3.0 U 0.800 U 3.02 J 5.20 U 11 04/04/2017 0.800 U 8.6 U 54.3 J 0.10 U 0.5 U 3.0 U 0.1 U 5.0 U 2.0 U 0.1 U 3.0 U 5.0 U 3.0 U 0.800 U 2.99 J 21.9 J 17.5 Notes: CAS Number A unique number assigned by the Chemical Abstracts Service (CAS) to all identified parameters. SWS ID The Solid Waste Section Identification Number. Units Micrograms per liter (µg/L) for analytical results and nephelometric turbidity units (NTU) for turbidity. BQL U Indicates parameter was not detected above the laboratory method detection limit. 2.6 U Indicates parameter was not detected above the laboratory method detection limit. NE Not Established NA Not Applicable J A laboratory data qualifier used for parameters detected at estimated concentrations above MDL but below MRL and SWSL. J Assigned by Anchor QEA to reflect a detected concentration that is greater than MRL and MDL but less than the SWSL. 2L Groundwater standards from North Carolina Administrative Code (NCAC), Title 15A: Department of Environmental Quality, Subchapter 2L - Groundwater Classifications and Standards, DEQ (Amended April 1, 2013). IMAC Interim Maximum Allowable Concentration. An IMAC is applied to a constituent if there is not a 2L standard established. Standards are from NCAC 15A 02L .0202. GWPS The Groundwater Protection Standard pursuant to 15A NCAC 13B .1634, DEQ. Current standards were obtained from http://deq.nc.gov/about/divisions/waste-management/waste-management-permit-guidance/solid-waste-section/environmental-monitoring/environmental-monitoring-list. 2B Chromium 2B Standard for chromium consists of the total of trivalent (III) and hexavalent (VI) chromium. 106 Indicates a detected result. 17 Indicates result exceeded its respective water quality standard. SW-02R "2B" indicates surface water standard per North Carolina Administrative Code, Title 15A: Department of Environment and Natural Resources, Subchapter 2B - Surface Water and Wetland Standards, (last amended on May 1, 2007). For compounds with no 2B standard established, the Environmental Protection Agency (EPA) National Criteria Table (current as of May 15, 2013) was used for the most stringent of fresh water and human health. 27.1 11.4 14 149 111 Madison County Operating Solid Waste Facility June 2017 Page 6 of 6 Table 2 April 2017 Metals Sampling Results Summary Metals Lab Certification 387 Lab Method EPA 6010D, 6020B Parameter Barium Barium (Dissolved)Beryllium Beryllium (Dissolved)Chromium Chromium (Dissolved)Cobalt Cobalt (Dissolved)Copper Copper (Dissolved)Lead Lead (Dissolved)Mercury Mercury (Dissolved)Nickel Nickel (Dissolved)Selenium Selenium (Dissolved)Vanadium Vanadium (Dissolved)Zinc Zinc (Dissolved)Turbidity CAS Number 7440-39-3 7440-39-3 7440-41-7 7440-41-7 7440-47-3 7440-47-3 7440-48-4 7440-48-4 7440-50-8 7440-50-8 7439-92-1 7439-92-1 7439-97-6 7439-97-6 7440-02-0 7440-02-0 7782-49-2 7782-49-2 7440-62-2 7440-62-2 7440-66-6 7440-66-6 SW330 SWS ID 15 15 23 23 51 51 53 53 54 54 131 131 132 132 152 152 183 183 209 209 213 213 330 Units µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L µg/L NTU Sample Name Collect Date Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Result Monitoring Well Samples MW-01 4/4/2017 103 98.1 J 0.100 U 0.100 U 3.00 U 3.00 U 0.792 J 0.813 J 5.00 U 11.7 2.00 U 3.3 J 0.100 U 0.100 U 3.00 U 3.00 U 5.00 U 5.00 U 1.41 J, B 1.32 J, B 12.3 J, F1, B 18.8 J 7.03 MW-02 4/3/2017 81.4 J 64.5 J 0.100 U 0.100 U 4.9 J 3.00 U 3.18 J 1.58 J 5.00 U 5.00 U 2.00 U 2.3 J 0.100 U 0.100 U 3.00 U 3.00 U 5.00 U 5.00 U 13.4 J, B 1.6 J, B 5.20 U 14.1 J 65.4 MW-03 4/4/2017 193 194 0.100 U 0.100 U 4.3 J 4.3 J 84.4 85.2 5.00 U 5.2 J 2.00 U 5.6 J 0.100 U 0.100 U 3.8 J 4.2 J 7.3 J 5.7 J 1.12 J, B 1.19 J, B 5.20 U 14.9 J 17.6 MW-04 4/4/2017 149 152 0.100 U 0.100 U 3.00 U 3.00 U 0.100 U 0.100 U 5.00 U 12.2 2.00 U 5.7 J 0.100 U 0.100 U 3.00 U 3.00 U 5.00 U 5.00 U 4.90 J, B 4.76 J, B 5.20 U 13.7 J 2.26 MW-05 4/3/2017 133 128 0.100 U 0.100 U 3.00 U 3.00 U 0.731 J 0.649 J 5.00 U 14.5 2.00 U 5.4 J 0.102 J, B 0.100 U 4.9 J 5.6 J 5.00 U 5.00 U 5.04 J, B 4.6 J, B 5.75 J, B 19.4 J 4.35 MW-06R 4/4/2017 25.4 J 24.9 J 0.100 U 0.100 U 3.00 U 3.00 U 0.100 U 0.100 U 5.00 U 12.3 2.00 U 4.3 J 0.100 U 0.100 U 3.00 U 3.00 U 5.00 U 5.00 U 1.52 J, B 1.63 J, B 5.20 U 17.3 J 2.04 MW-07R 4/3/2017 178 97.6 J 0.301 J 0.100 U 7.6 J 3.00 U 2.25 J 0.100 U 5.00 U 10.3 2.00 U 4.7 J 0.100 U 0.100 U 3.8 J 3.00 U 5.00 U 5.00 U 11.0 J, B 1.69 J, B 12.5 J, B 18.1 J 108 MW-08 4/3/2017 31.6 J 28.5 J 0.100 U 0.100 U 3.00 U 3.00 U 0.288 J 0.100 U 5.00 U 11.7 2.00 J 6.8 J 0.100 U 0.100 U 3.00 U 3.00 U 5.00 U 5.00 U 4.02 J, B 4.03 J, B 7.84 J, B 17.9 J 7.37 MW-09 4/4/2017 159 155 0.100 U 0.100 U 3.00 U 3.00 U 0.133 J 0.100 U 5.00 U 13.4 2.00 U 6.3 J 0.100 U 0.100 U 3.00 U 3.00 U 5.00 U 5.00 U 2.02 J, B 2.28 J,B 5.20 U 18.7 J 6.34 MDL 5.00 5.00 0.100 0.100 3.00 3.00 0.100 0.100 5.0 5.0 2.00 2.00 0.100 0.100 3.00 3.00 5.00 5.00 0.700 0.700 5.20 5.20 NA MRL 10.0 10.0 2.0 2.0 5.0 5.0 2.0 2.0 10 10 5.0 5.0 0.20 0.20 10.0 10.0 10.0 10.0 2.0 2.0 25.0 25.0 NA SWSL 100 100 1 1 10 10 10 10 10 10 10 10 0.2 1.2 50 50 10 10 25 25 10 10 NE 2L 700 700 NE NE 10 10 NE NE 1,000 1,000 15 15 1 1 100 100 20 20 NE NE 1,000 1,000 NE IMAC NE NE 4 4 NE NE 1 1 NE NE NE NE NE NE NE NE NE NE 0.3 0.3 NE NE NE GWPS NE NE 4 4 NE NE 1 1 NE NE NE NE NE NE NE NE NE NE 0.3 0.3 NE NE NE Notes: Lab Method The analytical method used to analyze the constituents. CAS Number A unique number assigned by the Chemical Abstracts Service (CAS) to all identified parameters. SWS ID The Solid Waste Section Identification Number. Units Micrograms per liter (µg/L) for analytical results, milligrams per liter (mg/L) for dissolved oxygen, Standard Units (SU) for pH, and nephelometric turbidity units (NTU) for turbidity. Collect Date The date on which the sample was collected in the field. Result Analytical data reported by the laboratory or field data collected by Anchor QEA. MDL The method detection limit, which is the minimum concentration of a substance that can be measured and reported with 99 percent confidence that the analyte concentration is greater than zero. MRL The method reporting limit, which is the minimum concentration of a target analyte that can be accurately determined by the referenced method. SWSL The Solid Waste Section Limit. This limit (identified by DEQ) is the lowest amount of analyte in a sample that can be quantitatively determined with suitable precision and accuracy. U A laboratory data qualifier used for parameters not detected at concentrations above MDL. J A laboratory data qualifier used for parameters detected at estimated concentrations above MDL but below MRL and SWSL. J Assigned by Anchor QEA to reflect a detected concentration that is greater than MRL and MDL but less than the SWSL. B A laboratory data qualifier used for parameters that were detected in both the laboratory blank and the sample. F1 A laboratory data qualifier that indicates the sample's matrix spike (MS) or matrix spike duplicate (MSD) was outside acceptance limits. 2L Groundwater standards from North Carolina Administrative Code (NCAC), Title 15A: Department of Environmental Quality, Subchapter 2L - Groundwater Classifications and Standards, DEQ (Amended April 1, 2013). IMAC Interim Maximum Allowable Concentration. An IMAC is applied to a constituent if there is not a 2L standard established. Standards are from NCAC 15A 02L .0202. GWPS The Groundwater Protection Standard pursuant to 15A NCAC 13B .1634, DEQ. Current standards were obtained from http://deq.nc.gov/about/divisions/waste-management/waste-management-permit-guidance/solid-waste-section/environmental-monitoring/environmental-monitoring-list. 2B NE Not Established NA Not Applicable Barium (Dissolved)A second metals sample was collected through a 0.45-micron groundwater filter and analyzed for dissolved metals concentrations. 106 Indicates a result in exceedance of the SWSL. 5.92 Indicates a result in exceedance of the 2L or IMAC standards. "2B" indicates surface water standard per North Carolina Administrative Code, Title 15A: Department of Environment and Natural Resources, Subchapter 2B - Surface Water and Wetland Standards, (last amended on May 1, 2007). For compounds with no 2B standard established, the Environmental Protection Agency (EPA) National Criteria Table (current as of May 15, 2013) was used for the most stringent of fresh water and human health. Spring 2017 Semiannual Water Quality Monitoring Report Madison County Operating Solid Waste Facility Page 1 of 1 June 2017