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HomeMy WebLinkAbout4103_GreensboroMSWLF_GWMR_DIN27820_20160418White Street Landfill - Phase I Permit # 41-03 Post-Closure Monitoring April 2016 Greensboro North Carolina S&ME Project No. 1584-98-081C Prepared for: The City of Greensboro Prepared by: S&ME, Inc. 8646 W Market St, Suite 105 Greensboro, NC 27409 June 23, 2016 White Street Landfill – Phase I Post-Closure Monitoring Report Greensboro, North Carolina S&ME Project No. 1584-98-081C June 23, 2016 ii Table of Contents 1.0 Executive Summary...............................................................................................1 2.0 Introduction............................................................................................................1 3.0 Scope Of Work.......................................................................................................2 4.0 Methods Employed...............................................................................................2 4.1 Monitoring Well Sampling..............................................................................................2 4.2 Stream Sampling...............................................................................................................3 5.0 Results......................................................................................................................4 5.1 Groundwater Analytical Results....................................................................................4 5.2 Groundwater Flow Direction..........................................................................................4 5.3 Surface Water....................................................................................................................4 5.4 Quality Assurance............................................................................................................5 6.0 References...............................................................................................................5 7.0 Certification............................................................................................................6 TABLES Table 1:Well Construction and Groundwater Elevation Data Table 2:Summary of Groundwater Sampling Field Parameters Table 3:Summary of Groundwater Analytical Results - Detections Table 4:Summary of Groundwater Standard Exceedances Table 5:Summary of Surface Water Analytical Results - Detections Table 6:Summary of 2B Surface Water Standard - Exceedances FIGURES Figure 1:Groundwater Flow Map Figure 2:Stream Sample Location APPENDICES Appendix I: Groundwater Sampling Field Data Sheets Appendix II: Laboratory Analytical Reports Appendix III: NCDEQ EDDs (CD only) White Street Landfill – Phase I Post-Closure Monitoring Report Greensboro, North Carolina S&ME Project No. 1584-98-081C June 23, 2016 1 1.0 Executive Summary Five monitoring wells and five stream locations at Phase I of the White Street Landfill were sampled between April 19 and April 20, 2016. Five wells (I-1, I-2, I-3, I-4 and MW-13) comprise the groundwater monitoring system for the closed Phase I unit at the White Street Landfill facility. Monitoring well MW-13 serves as a background well for both the Phase I and the Phase II areas. The sampling was conducted according to North Carolina Solid Waste Management Guidelines and samples were analyzed by a North Carolina certified laboratory. Analytical results from the five Phase I monitoring wells indicate that the following NCAC 2L groundwater quality standards were exceeded. ♦Benzene was detected at 3.9 µg/L at well I-1, this concentration exceeds the 15A NCAC 2L groundwater standard (2L Standard) of 1 µg/L. ♦Vinyl Chloride was detected at an estimated concentration of 0.47 µg/L at well I-3, this concentration exceeds the 2L Standard of 0.03 µg/L. With regards to surface water sampling, no volatile organic constituents were detected. Inorganic constituents (total metals) were detected at each sampled location. Analytical results for surface water samples collected up-stream of the White Street Landfill exhibited concentrations of metals. Sample collected down-stream were reported to contain similar metals, with concentrations generally lower than those reported for the up-stream samples. In view of this and prior surface water and groundwater monitoring data, the closed Phase I landfill is not considered to be the source of these constituents. Furthermore, no reported concentrations were greater than the corresponding NCAC 2B surface water standards for Water Supply. It is believed that the cause of the benzene and vinyl chloride 2L Standard exceedances within the hydrogeologic regime at Phase I is from percolation of landfill constituents from the waste management unit into the uppermost groundwater aquifer. Analytical results for the samples obtained from monitoring wells I-1 and I-3 report apparent 2L Standard exceedances. These wells are located less than 100 feet from the limit of waste and between the limits of waste and the compliance boundary. The City of Greensboro believes that Phase I of the White Street Landfill was closed prior to January 1, 1983, and as such, assessment and cleanup of this landfill unit should fall under jurisdiction of the NCDEQ Inactive Hazardous Sites program Pre-Regulatory Landfill Unit, for “orphan landfills.” 2.0 Introduction White Street Landfill is a Solid Waste Management Facility (SWMF) located at the north end of White Street in northeastern Greensboro. S&ME, Inc. (S&ME) was contracted by the City of Greensboro to complete this water quality monitoring event. Phase I of the landfill is a closed unit, reportedly covered by Solid Waste Permit #41-03, which also covers Phase II of the Facility.Figure 1 is a map showing the monitor well locations. One up-gradient and four down-gradient monitoring wells located along the perimeter of the closed Phase I disposal area were sampled. Five surface water samples were collected from North Buffalo Creek and one of its tributaries in the vicinity of the White Street facility. Phase I shares the surface water sampling locations with adjacent Phase II. White Street Landfill – Phase I Post-Closure Monitoring Report Greensboro, North Carolina S&ME Project No. 1584-98-081C June 23, 2016 2 The samples collected from Phase I monitoring wells I-1, I-2, I-3, and I-4, were analyzed for Appendix I volatile organic constituents and the eight RCRA metals. Since background monitoring well MW-13 is shared with Phase II, the collected sample was analyzed for Appendix I constituents. This report discusses the field procedures, summarizes the field measurements and analytical results for the post-closure monitoring event completed during April 2016. 3.0 Scope Of Work To complete the scope of work, S&ME completed the following tasks: ♦Sampled five monitoring wells and five surface water locations. ♦Obtained field values for pH, temperature, conductivity, dissolved oxygen (DO), oxidation- reduction potential (ORP), and turbidity at each sampled monitoring well location. ♦Depth to water measurements were collected prior to sampling and during well purging to monitor drawdown. ♦Groundwater samples I-1, I-2, I-3, and I-4, were analyzed for Appendix I organic constituents and 8-RCRA metals by a North Carolina certified laboratory, using State approved methods. ♦Groundwater sample MW-13 was analyzed for Appendix I constituents by a North Carolina certified laboratory, using State approved methods. ♦Surface water samples SW-1, SW-2, SW-3, SW-4 and SW-5 were analyzed for Appendix I constituents by a North Carolina certified laboratory, using State approved methods. ♦Estimated groundwater flow directions for the Phase I area. ♦Prepared and submitted this Post-Closure Monitoring Report to the City of Greensboro and the North Carolina Department of Environmental Quality (NCDEQ). 4.0 Methods Employed 4.1 Monitoring Well Sampling Phase I groundwater monitoring well sampling took place between April 19 and April 20, 2016, with shared background monitoring well MW-13 sampled on April 20, 2016. The monitoring well locations are shown on Figure 1. A representative from S&ME opened each well and measured the static water level from the top edge of the PVC casing in wells. The total well depth sounding data reported for the sampling events completed during September 1997 and May 1998 were used to determine the volume of water in wells I-1, I-2, I-3, I-4 and MW-13, where dedicated MicroPurge™pumps had been previously installed.Table 1 provides a summary of relevant well construction details. In accordance with the facility's approved Water Quality Monitoring Plan, each well was purged using the dedicated MicroPurge™pumps using compressed air. At each well, the purge rate and the drawdown of the water table were monitored as an indicator of how much stress the purging placed on the aquifer. The purge rates were calculated by recording the time required to fill a graduated cylinder. The purging flow rates varied but were approximately 100 milliliters/minute (ml/min.). During purging, the depth to water was periodically monitored and recorded on the groundwater sampling field data sheets. White Street Landfill – Phase I Post-Closure Monitoring Report Greensboro, North Carolina S&ME Project No. 1584-98-081C June 23, 2016 3 It is our opinion that the observed drawdowns were generally minor during purging; therefore, the stresses placed on the aquifer should have been insignificant. The observed drawdown data suggests that the purging rates should have been low enough such that recharge water should not have been overly agitated, reducing the potential for colloids to be drawn into the well bore. The purge water from each of these wells was monitored for pH, temperature, conductivity, DO, ORP and turbidity. The time interval between measurements approximated one equipment volume, at a minimum. Sample collection commenced when the changes in those readings fluctuated no more than 10 percent and utilizing a turbidity goal of 10 NTU, or less. Despite the use of low flow methods, turbidity values remain higher than ideal during the purging of wells I-2 and I-4; therefore, samples were collected without meeting the turbidity goal, relying upon professional judgement. The field data collected during sampling was recorded on the groundwater sampling field data sheets, included in Appendix I.Table 2 provides a summary of the field data collected during this event. Groundwater samples were collected from dedicated pump discharge Teflon tubing at the top of each well. Immediately upon collection, each sample was placed in laboratory supplied containers and placed in a cooler with ice. The sampler wore nitrile gloves that were changed between wells to reduce the possibility of cross contamination. Upon collection, the groundwater samples were maintained under chain-of custody. Phase I monitoring well samples I-1, I-2, I-3 and I-4 were analyzed for Appendix I volatile organic constituents and the eight RCRA metals. Since background well MW-13 is shared with Phase II, the collected sample was analyzed for Appendix I constituents. Analyses were conducted by Environmental Conservation Laboratories, a North Carolina certified laboratory. 4.2 Stream Sampling Surface water sampling took place on April 20, 2016. Surface water SW-1 was collected from North Buffalo Creek on the west side of the U.S. Highway 29 bridge upstream of the landfill. Surface water SW-2 was collected from a southern tributary of North Buffalo Creek just before it joins the main creek west of the landfill entrance. SW-3 was collected from North Buffalo Creek downstream of the North Buffalo Wastewater Treatment Plant outfall and upstream of the landfill. SW-4 was collected from North Buffalo Creek downstream of the landfill at a USGS gauging station located on North Buffalo Creek about three- quarters of a mile north of the landfill. SW-5 was collected from North Buffalo Creek immediately downstream of the Phase I and II landfill disposal areas. The locations are shown in Figure 2. The surface water samples were collected by immersing laboratory supplied containers in the water to be sampled. After collection, the surface water samples were placed in a cooler with ice and placed under chain-of-custody. Each surface water sample was analyzed for Appendix I inorganic and volatile organic constituents by Environmental Conservation Laboratories; a North Carolina certified laboratory. White Street Landfill – Phase I Post-Closure Monitoring Report Greensboro, North Carolina S&ME Project No. 1584-98-081C June 23, 2016 4 5.0 Results 5.1 Groundwater Analytical Results Table 3 provides a summary of the constituent concentrations reported above the method detection limit (MDL) for the groundwater samples collected. Concentrations reported between the MDL and the Solid Waste Section Limits (SWSL) are considered estimated, thus shown as a “J” flagged concentration.Table 4 provides a summary of the reported concentrations which exceed the 15A NCAC 2L Standards (2L Standard). For some constituents where there is no established 2L Standard, North Carolina has published Interim Maximum Allowable Concentrations (IMACs). The IMAC values are intended to help NCDEQ in assessing conditions and setting health protective groundwater levels at regulated sites. As such the IMAC are only interim and not final groundwater quality standards. The following summarizes the exceedances of the corresponding 2L Standard or IMAC. ♦At well I-1, benzene was detected at 3.9 µg/L, which exceeds the 2L Standard of 1 µg/L. ♦At well I-3, vinyl chloride was detected at estimated concentrations of 0.47 µg/L, which exceeds the 2L Standard of 0.03 µg/L. The complete laboratory analytical reports are included in Appendix II. Analytical results in the NCDEQ EDD format are contained in Appendix III (CD only). 5.2 Groundwater Flow Direction The static water levels in the four Phase I monitoring wells were measured between April 19 and April 20, 2016, while background monitoring well MW-13 was measured on April 20, 2016. The depths to the water table ranged from 2.15 to 19.30 feet below the top of well casings on these dates. Groundwater and well casing elevation data are presented in Table 1. A groundwater contour map constructed using the data collected during this monitoring event is presented as Figure 1. The groundwater elevation data collected during this monitoring event indicates that the groundwater beneath Phase I generally flows to the north toward Buffalo Creek. 5.3 Surface Water Table 5 provides a summary of the constituent concentrations reported above the MDL for the surface water samples collected. Concentrations reported between the MDL and the SWSL are considered estimated, thus shown as a “J” flagged concentration.Table 6 provides a summary of the reported concentrations which exceed the corresponding 15A NCAC 2B Standard (2B Standard) for Water Supply. The following summarizes the exceedances of the 2B Standards. The complete laboratory analytical report is included in Appendix II. ♦No 2B Standard exceedances. Surface water sample locations SW-1 and SW-2 are up-stream of the facility. Similar constituents were detected up-stream of the facility and down-stream, with constituent concentrations for the up-stream samples generally greater than or equal to those reported for down-stream sample locations. Based on the surface water analytical data obtained, this closed landfill is not believed to be the source of the metals detected. White Street Landfill – Phase I Post-Closure Monitoring Report Greensboro, North Carolina S&ME Project No. 1584-98-081C June 23, 2016 5 5.4 Quality Assurance A qualitative review of the data was performed to verify that the detected concentrations in the laboratory report were of known quality. A formal, quantitative data validation was not performed. Laboratory- assigned data qualifiers were evaluated to verify that rejected or unsupportable data were not included in the dataset. Quality control data provided in the laboratory reports were also reviewed. No rejected or otherwise unacceptable quality data were reported from the laboratory. The monitoring wells in Phase I were sampled using dedicated micro-purge pumps. Therefore, no equipment rinse samples were collected for analysis for data quality control. Trip blank samples accompanied the sample bottles from the time they left the laboratory until they returned. The trip blank samples were analyzed for Appendix I volatile organic constituents. No volatile organic constituents were present in the trip blank samples at detectable levels. Laboratory QC samples were analyzed for all constituents included in this sampling event. The results of the trip blank and laboratory QC sample analyses are included in Appendix II. 6.0 References Fetter, C. W., 1988, Applied Hydrogeology, New York; Macmillian Publishing Company, 1988, 592 pp. North Carolina Administrative Code, Title 15A, Department of Environment, Health and Natural Resources, Division of Environmental Management, Subchapter 2L, Classifications and Water Quality Standards Applicable to the Groundwaters of North Carolina, Sections .0100, .0200, and .0300; from the Environmental Management Commission Raleigh, North Carolina. North Carolina Administrative Code, Title 15A, Department of Environment, Health and Natural Resources, Division of Environmental Management, Subchapter 2B, Classifications and Water Quality Standards Applicable to the Surface Waters of North Carolina, Section .0200; from the Environmental Management Commission, Raleigh, North Carolina. North Carolina Administrative Code, Title 15A, Department of Environment, Health and Natural Resources, Division of Solid Waste Management, subchapter 13B, Solid Waste Management, Section .1600. White Street Landfill – Phase I Post-Closure Monitoring Report Greensboro, North Carolina S&ME Project No. 1584-98-081C June 23, 2016 6 7.0 Certification I hereby certify this 23 rd day of June 2016 that this report was prepared by me or under my direct supervision. ______________________________ Edmund Q.B. Henriques, L.G. Senior Geologist / Project Manager Technical support provided by: ______________________________ Amanda Bloom Staff Professional Appendices TABLE 1 WELL CONSTRUCTION AND GROUNDWATER ELEVATION DATA PHASE 1 - PERMIT # 41-03 WHITE STREET LANDFILL GREENSBORO, NORTH CAROLINA S&ME PROJECT NO. 1584-98-081C Well ID Date Installed Total Depth Well Diameter Depth to Top of Screen Well Screen Interval Geology of Screened Interval Northing Easting Ground Elevation Top of Casing Elevation Depth to Groundwater1 Groundwater Elevation NAD 83 NAD 83 NAVD 88 NAVD 88 Apr-16 Apr-16 (feet)(inches)(feet)(feet bgs)(feet msl.)(feet msl.)(feet)(feet msl.) I-1 7/14/1989 24 2 14 14 - 24 partially weather rock 1785583.98 859726.77 not measured 713.75 7.41 706.34 I-2 7/14/1989 24 2 14 14 - 24 sandy silt 1785319.23 860640.98 not measured 703.09 4.55 698.54 I-3 7/14/1989 24 2 14 14 - 24 sandy silt 1785334.06 861315.16 not measured 707.43 13.07 694.36 I-4 7/14/1989 15 2 5 5 -15 sandy silt saprolite 1786167.37 861969.09 not measured 694.94 2.15 692.79 MW-13 7/14/1989 34 2 19 19 - 34 sandy silt saprolite 1783166.56 858751.94 not measured 741.24 19.30 721.94 City of Greensboro provided the top of casing elevations and ground surface elevations Well Construction details obtained from Well Construction Records reported by BPA Environmental & Engineering, Inc. feet bgs. = feet below ground surface feet msl. = feet mean sea level Depth to Groundwater 1= below top of casing Groundwater Elevation = calculated groundwater elevation T:\Projects\1998\ENV\081C White Street Landfill (2014)\2016 Compliance Monitoring\Spring 2016\Phase 1\Phase1_April_2016_tables.xlsx TABLE 2 SUMMARY OF GROUNDWATER SAMPLING FIELD PARAMETERS PHASE 1 - PERMIT # 41-03 WHITE STREET LANDFILL GREENSBORO, NORTH CAROLINA S&ME PROJECT NO. 1584-98-081C DATE WELL WELL DEPTH TO WATER ODOR PURGE PUMP WELL EVAC PURGED TEMP pH SPECIFIC ORP DO TURBIDITY ID DEPTH WATER ELEVATION METHOD RATE VOLUME VOLUME DRY?CONDUCTANCE (feet)(feet)(feet)(mL/min)(gallons)(gallons)(yes/no)(deg C)(SU)(μs/cm)(mV-NHE)(mg/L)(NTU) 4/19/2016 I-1 25.0 7.41 706.34 None low flow 100 2.87 1.1 no 18.46 5.87 2.515 63 1.11 12.09 4/19/2016 I-2 21.3 4.55 698.54 None low flow 100 2.73 1.1 no 18.34 6.19 1.803 6.0 0.98 40.90 4/20/2016 I-3 24.2 13.07 694.36 None low flow 100 1.81 1.1 no 13.97 6.38 1.798 32.0 0.59 1.05 4/20/2016 I-4 15.0 2.15 692.79 None low flow 100 2.09 1.3 no 16.12 6.82 1.338 -107 0.19 51.00 4/20/2016 MW-13 33.0 19.30 721.94 None low flow 100 2.19 1.1 no 16.29 6.36 0.323 135 6.18 2.01 Notes: 1. TEMP = groundwater temperature, measured in degrees Celsius 2. Pump Rate, measured in milliliters/minute 3. Specific Conductance, measured in μs/cm indicates micro Siemens per centimeter. 4. SU indicates Standard Units. 5. NTU indicates Nephelometric Turbidity Units. 6. ORP = Oxidation Reduction Potential, mV-NHE indicates millivolts-Normal Hydrogen Electrode. 7. EVAC = evacuated volume of groundwater 8. DO = dissolved oxygen, measured in milligrams per liter NC SWSL NCAC 2L NCDENR Federal Well ID I-1 I-2 I-3 I-4 MW-13 Standards IMAC MCLs Sample ID 4103-I1 4103-I2 4103-I3 4103-I4 4103-MW13 Date Collected 04/19/16 04/19/16 04/20/16 04/20/16 04/20/16 Detected Analytes (µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L) 75 1,1-Dichloroethane 0.45 J <0.13 2.0 J <0.13 <0.13 5 6 ns ns 69 1,2-Dichlorobenzene <0.19 1.1 J 0.44 J <0.19 <0.19 5 20 ns 600 71 1,4-Dichlorobenzene 4.7 1.3 2.4 2.4 <0.19 1 6 ns 75 16 Benzene 3.9 <0.15 <0.15 <0.15 <0.15 1 1 ns 5 39 Chlorobenzene 10 6.0 8.3 4.4 <0.17 3 50 ns 100 78 cis-1,2-Dichloroethene 0.51 <0.15 0.43 J <0.15 <0.15 5 70 ns 70 211 Vinyl Chloride <0.32 <0.32 0.47 J <0.32 <0.32 1 0.03 ns 2 15 Barium 672 513 135 699 <1.00 100 700 ns 2,000 51 Chromium <1.40 3.57 J 1.56 J 2.83 J <1.40 10 10 ns 100 µg/L =concentrations reported in micrograms per liter (ug/L) < = concentrations is less than the method detection limit shown NC SWSL = North Carolina Solid Waste Section Limit J = Concentration reported greater than the method detection limit but less than the SWSL, thus it is considered estimated NCAC 2L Standards = 15A North Carolina Administrative Code 2L .0200, GW Quality Standards for Class GA groundwater. concentrations in bold exceed the corresponding 2L Standard NCDENR IMAC = Interim Maximum Allowed Concentration, NCDENR Federal MCL = Maximum Concentration Levels, USEPA ns = no MCL listed, USEPA na = not analyzed S&ME PROJECT NO. 1584-98-081C TABLE 3 SUMMARY OF GROUNDWATER ANALYSES RESULTS - DETECTIONS PHASE 1 - PERMIT # 41-03 WHITE STREET LANDFILL GREENSBORO, NORTH CAROLINA Solid Waste Section ID # Sample Locations 8-RCRA Metals + Appendix II Metals Appendix II Volatile Organic Compounds TABLE 4 SUMMARY OF GROUNDWATER STANDARD EXCEEDANCES PHASE 1 - PERMIT # 41-03 WHITE STREET LANDFILL GREENSBORO, NORTH CAROLINA S&ME PROJECT NO. 1584-98-081C NCAC 2L NCDENR Federal Well ID I-1 I-2 I-3 I-4 Standards IMAC MCLs Sample ID 4103-I1 4103-I2 4103-I3 4103-I4 Date Collected 04/20/16 04/20/16 04/20/16 04/20/16 Detected Analytes (µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L) Appendix I Volatile Organic Compounds 16 Benzene 3.9 0.03 ns 2 211 Vinyl Chloride 0.47 J 0.03 ns 2 8-RCRA Metals µg/L =concentrations reported in micrograms per liter (µg/L) NC SWSL = North Carolina Solid Waste Section Limit NCAC 2L Standards = 15A North Carolina Administrative Code 2L .0200, GW Quality Standards for Class GA groundwater. Only concentrations greater than the NCAC 2L Standards are shown NCDENR IMAC = Interim Maximum Allowed Concentration, NCDENR Federal MCL = Maximum Concentration Levels, USEPA ns = no MCL listed, USEPA Solid Waste Section ID # Sample Locations No 8-RCRA Metal (totals) concentrations exceeded their respective 2L Standards NC SWSL NCAC 2B Sample Location SW-1 SW-2 SW-3 SW-4 SW-5 Standards* Sample ID 4103-SW1 4103-SW2 4103-SW3 4103-SW4 4103-SW5 Date Collected 04/20/16 04/20/16 04/20/16 04/20/16 04/20/16 Detected Analytes (µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L) 13 Antimony <0.220 <0.220 <0.220 0.424 J 0.261 J 6 5.6 15 Barium 113 46.3 J 47.5 J 31.0 J 35.4 J 100 1000 51 Chromium 14.6 <1.40 6.73 J <1.40 <1.40 10 no standard 53 Cobalt 7.38 J <1.10 4.32 J 1.66 J 2.10 J 10 no standard 54 Copper 21.2 <1.60 10.8 2.56 J 4.07 J 10 no standard 131 Lead 14.6 <3.10 6.10 J <3.10 <3.10 10 no standard 152 Nickel 5.60 J <2.20 5.02 J 8.54 J 2.88 J 50 25 209 Vanadium 26.9 <1.40 12.0 J 2.13 J 3.04 J 25 no standard 213 Zinc 111 <4.40 95.5 31.5 44.7 10 no standard J = * = Title 15A NCAC 2B Standards for all Water Supply Classifications µg/L = concentrations reported in micrograms per liter (µg/L) < = concentrations is less than the method detection limit shown NC SWSL = North Carolina Solid Waste Section Limit Concentration reported greater than the method detection limit but less than the SWSL, thus it is considered estimated Solid Waste Section ID # Appendix I Metals Appendix I Volatile Organic Compounds Sample Locations No Appendix I Volatile Organic Compounds were detected above their respective laboratory reporting limit S&ME PROJECT NO. 1584-98-081C TABLE 5 SUMMARY OF SURFACE WATER ANALYSES RESULTS - DETECTIONS PHASE 1 - PERMIT # 41-03 WHITE STREET LANDFILL GREENSBORO, NORTH CAROLINA SUMMARY OF 2B SURFACE WATER STANDARD EXCEEDANCES PHASE 1 - PERMIT # 41-03 WHITE STREET LANDFILL Sample Locations NC SWSL NCAC 2B Sample Location SW-1 SW-2 SW-3 SW-4 SW-5 Standards* Sample ID 4103-SW1 4103-SW2 4103-SW3 4103-SW4 4103-SW5 Date Collected 04/20/16 04/20/16 04/20/16 04/20/16 04/20/16 Detected Analytes (µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L)(µg/L) concentrations in bold print are greater than the referenced NCAC 2B Standard µg/L =concentrations reported in micrograms per liter (µg/L) < =concentrations is less than the method detection limit shown * = Title 15A NCAC 2B Standards for all Water Supply Classifications J = Solid Waste Section ID # 8-RCRA Metals TABLE 6 Concentration reported greater than the method detection limit but less than the SWSL, thus it is considered estimated GREENSBORO, NORTH CAROLINA S&ME PROJECT NO. 1584-98-081C No NCAC 2B Standard* Exceedances Detected II - 8 I- 2 I- 1 I- 3 I- 5 MW-14 II - 6 I - 4 II - 1 II-5 M W - 1 3 II - 1 2 SM W - 4 7 0 0 . 0 0 71 0 . 0 0 72 0 . 0 0 6 9 4 . 0 0 6 9 6 . 0 0 6 9 8 . 0 0 7 0 2 . 0 0 7 0 4 . 0 0 70 6 . 0 0 70 8 . 0 0 71 2 . 0 0 71 4 . 0 0 71 6 . 0 0 71 8 . 0 0 GROUNDWATER FLOW MAP WHITE STREET LANDFILL GREENSBORO, NORTH CAROLINA AS SHOWNRDMEQBH 1584-98-081CMAY 20161 PHASE I LE G E N D : SU R F A C E W A T E R S A M P L I N G P O I N T GR O U N D W A T E R E L E V A T I O N MO N I T O R I N G W E L L L O C A T I O N GR O U N D W A T E R F L O W D I R E C T I O N GR O U N D W A T E R C O N T O U R L I N E (7 0 6 . 3 4 ) (6 9 8 . 5 4 ) (6 9 2 . 7 9 ) (7 0 6 . 3 4 ) (6 9 4 . 3 6 ) (7 2 1 . 9 4 ) PHASE II WHITE STREET LANDFILL GREENSBORO, NORTH CAROLINA AS SHOWNDSB/RDMLE 1584-98-081DECEMBER 20072 SURFACE WATER SAMPLING LOCATIONS 0 800 400 800 SCALE: 1" = 800' LE G E N D ST R E A M S A M P L E L O C A T I O N Appendix I – Groundwater Sampling Field Data Sheets Location:Purge Date: Project No.:Purge Time: Source Well:Sample Date: Sample Time: Locked?:Yes:x No:Weather: Sampled By:Air Temp: feet feet 17.59 feet Purge Method Sample Method Start 1645 Stop 1750 Purge Rate ml/min Control Settings On: 3.0 sec.Start 1750 Stop 1800 Off: 27.0 sec. Pressure:psi 2" well: height:17.59 x .163 =2.86717 gallons liters x Yes No x *Stabilization Parameters Time Date Temp pH Conductivity *ORP *D.O.*Turbidity DTW 1645 4/19/2016 1650 4/19/2016 19.27 5.92 2.438 76 7.90 8.64 7.59 1655 4/19/2016 19.61 5.90 2.523 77 2.71 11.20 7.57 1700 4/19/2016 19.90 5.89 2.590 77 1.61 21.10 7.90 1705 4/19/2016 20.38 5.87 2.648 77 1.38 36.50 7.55 1710 4/19/2016 19.24 5.86 2.609 75 1.11 43.30 7.57 1715 4/19/2016 19.16 5.85 2.605 72 1.05 36.50 7.56 1720 4/19/2016 19.00 5.86 2.599 70 1.04 30.50 7.59 1725 4/19/2016 19.10 5.87 2.603 71 0.99 23.80 7.57 1730 4/19/2016 18.86 5.87 2.585 68 0.96 19.20 7.55 1735 4/19/2016 18.85 5.87 2.572 66 1.14 15.30 7.55 1740 4/19/2016 18.80 5.87 2.568 65 1.16 14.60 7.57 1745 4/19/2016 18.77 5.87 2.536 64 1.14 12.30 7.56 1750 4/19/2016 18.46 5.87 2.515 63 1.11 12.09 7.58 Final Readings 1750 4/19/2016 18.46 5.87 2.515 63 1.11 12.09 7.58 * C units mS/cm mV mg/L NTU Tuesday, April 19, 2016 Tuesday, April 19, 2016 GROUNDWATER SAMPLING FIELD DATA White Street Landfill 1584-98-081 4103-I1 Gary Simcox Depth to water from measuring point:7.41 1800 Sunny 80 *F Water Level & Well Data Depth to well bottom from measuring point:25.00 Height of water column: Bladder Pump Measuring point:Top of Casing Well Purging & Sample Collection Bladder Pump Purge Time Sample Collection Time Was well purged dry Field Analyses Volume of water in well Volume of water removed 4.0 100 Location:Purge Date: Project No.:Purge Time: Source Well:Sample Date: Sample Time: Locked?:Yes:x No:Weather: Sampled By:Air Temp: feet feet 16.75 feet Purge Method Sample Method Start 1525 Stop 1605 Purge Rate ml/min Control Settings On: 3.0 sec.Start 1605 Stop 1615 Off: 27.0 sec. Pressure:psi 2" well: height:16.75 x .163 =2.73025 gallons liters x Yes No x *Stabilization Parameters Time Date Temp pH Conductivity *ORP *D.O.*Turbidity DTW 1525 4/19/2016 1530 4/19/2016 22.61 6.14 1.920 -20 2.03 30.60 4.38 1535 4/19/2016 19.08 6.15 1.874 -11 1.14 55.90 4.60 1540 4/19/2016 18.91 6.16 1.750 1 0.69 67.10 4.61 1545 4/19/2016 18.63 6.16 1.847 2 0.73 70.10 4.46 1550 4/19/2016 18.69 6.17 1.836 7 0.82 47.80 4.45 1555 4/19/2016 18.42 6.18 1.825 7 0.89 41.90 4.48 1600 4/19/2016 18.22 6.18 1.814 7 0.89 39.50 4.45 1605 4/19/2016 18.34 6.19 1.803 6 0.98 40.90 4.46 Final Readings 1605 4/19/2016 18.34 6.19 1.803 6 0.98 40.90 4.46 * C units mS/cm mV mg/L NTU Field Analyses Volume of water in well Volume of water removed 4.0 Bladder Pump 100 Sample Collection Time Was well purged dry Bladder Pump Purge Time GROUNDWATER SAMPLING FIELD DATA Water Level & Well Data Depth to water from measuring point:4.55 1615 Height of water column: Measuring point:Top of Casing Well Purging & Sample Collection Sunny 80 *FGary Simcox Depth to well bottom from measuring point:21.30 Tuesday, April 19, 2016 Tuesday, April 19, 2016 White Street Landfill 1584-98-081 4103-I2 Location:Purge Date: Project No.:Purge Time: Source Well:Sample Date: Sample Time: Locked?:Yes:x No:Weather: Sampled By:Air Temp: feet feet feet Purge Method Sample Method Start 720 Stop 810 Purge Rate ml/min Control Settings On: 3.0 sec.Start 810 Stop 820 Off: 27.0 sec. Pressure: 21 psi 2" well: height:11.13 x .163 =1.81419 gallons liters x Yes No x *Stabilization Parameters Time Date Temp pH Conductivity *ORP *D.O.*Turbidity DTW 720 4/20/2016 725 4/20/2016 13.83 6.38 2.008 82 8.70 1.14 13.18 730 4/20/2016 13.88 6.37 1.936 70 3.39 3.05 13.33 735 4/20/2016 13.80 6.36 1.891 59 1.92 1.50 13.32 740 4/20/2016 13.73 6.36 1.858 52 1.38 2.17 13.28 745 4/20/2016 13.68 6.36 1.831 45 1.00 1.04 13.27 750 4/20/2016 13.71 6.36 1.816 40 0.83 0.99 13.29 755 4/20/2016 13.78 6.36 1.811 37 0.74 1.00 13.26 800 4/20/2016 13.84 6.36 1.809 35 0.68 1.26 13.30 805 4/20/2016 13.90 6.37 1.804 33 0.61 1.24 13.28 810 4/20/2016 13.97 6.38 1.798 32 0.59 1.05 13.28 Final Readings 810 4/20/2016 13.97 6.38 1.798 32 0.59 1.05 13.28 * C units mS/cm mV mg/L NTU GROUNDWATER SAMPLING FIELD DATA White Street Landfill 1584-98-081 4103-I3 820 Sunny 70 *F Water Level & Well Data Wednesday, April 20, 2016 Wednesday, April 20, 2016 Depth to well bottom from measuring point:24.20 Height of water column:11.13 Gary Simcox Depth to water from measuring point:13.07 Measuring point:Top of Casing Well Purging & Sample Collection Bladder Pump Purge Time Field Analyses Volume of water in well Volume of water removed 4.0 Bladder Pump 100 Sample Collection Time Was well purged dry Location:Purge Date: Project No.:Purge Time: Source Well:Sample Date: Sample Time: Locked?:Yes:x No:Weather: Sampled By:Air Temp: feet feet feet Purge Method Sample Method Start 845 Stop 940 Purge Rate ml/min Control Settings On: 2.0 sec.Start 940 Stop 950 Off: 28.0 sec. Pressure: 15 psi 2" well: height:12.85 x .163 =2.09455 gallons liters x Yes No x *Stabilization Parameters Time Date Temp pH Conductivity *ORP *D.O.*Turbidity DTW 845 4/20/2016 850 4/20/2016 14.43 6.62 1.244 -42 2.13 20.30 3.05 855 4/20/2016 14.37 6.74 1.244 -84 1.07 62.90 3.33 900 4/20/2016 14.41 6.79 1.257 -94 0.50 103.30 3.43 905 4/20/2016 14.63 6.80 1.274 -99 0.38 106.50 3.53 910 4/20/2016 14.92 6.81 1.291 -103 0.30 99.60 3.52 915 4/20/2016 15.24 6.82 1.305 -105 0.26 85.80 3.54 920 4/20/2016 15.61 6.82 1.318 -106 0.24 78.10 3.53 925 4/20/2016 15.30 6.82 1.334 -108 0.22 66.30 3.55 930 4/20/2016 15.87 6.82 1.333 -108 0.21 59.10 3.52 935 4/20/2016 15.97 6.82 1.334 -107 0.21 54.50 3.55 940 4/20/2016 16.12 6.82 1.338 -107 0.19 51.00 3.55 Final Readings 940 4/20/2016 16.12 6.82 1.338 -107 0.19 51.00 3.55 * C units mS/cm mV mg/L NTU Purge Time Volume of water in well Volume of water removed 5.0 Bladder Pump 100 Sample Collection Time Was well purged dry Field Analyses 70 *FGary Simcox Measuring point:Top of Casing Well Purging & Sample Collection Depth to water from measuring point:2.15 Depth to well bottom from measuring point:15.00 Height of water column:12.85 Bladder Pump GROUNDWATER SAMPLING FIELD DATA Water Level & Well Data White Street Landfill 1584-98-081 4103-I4 Wednesday, April 20, 2016 950 Sunny Wednesday, April 20, 2016 Appendix II – Laboratory Analytical Reports Appendix III – NCDEQ EDDs (CD Only)