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HomeMy WebLinkAbout9402_WashingtonCounty_MSWLF_GWMR_20170918DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F September 2017 Groundwater Monitoring Report Washington County Closed MSW Landfill Roper, North Carolina NC Solid Waste Permit No. 94-02 – MSWLF-1980 Prepared for: Washington County P.O. Box 1007 Plymouth, North Carolina 27962 December 2017 Prepared by: © 2017 Smith Gardner, Inc. This document is intended for the sole use of the client for which it was prepared and for the purpose agreed on by the client and Smith Gardner, Inc. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F September 2017 Groundwater Monitoring Report Washington County Closed MSW Landfill NC Permit No. 94-02-MSWLF-1980 Prepared For: Washington County Solid Waste Plymouth, North Carolina S+G Project No. WASH 08-2 Madeline German, P.G. Project Geologist Joan A. Smyth, P.G. Senior Hydrogeologist December 2017 DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F 12/14/2017 12/14/2017 This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Washington County Closed MSW Landfill September 2017 Groundwater Monitoring Report December 2017 Table of Contents Page i Washington County Closed MSW Landfill NC Solid Waste Permit No. 94-02-MSWLF 1980 September 2017 Groundwater Monitoring Report Table of Contents Page 1.0 INTRODUCTION ......................................................................................................... 1  2.0 REGIONAL GEOLOGY ................................................................................................. 1  3.0 SAMPLING LOCATIONS ............................................................................................. 1  4.0 SAMPLING PROCEDURES ......................................................................................... 1  5.0 FIELD & LABORATORY DATA ..................................................................................... 2  5.1 Laboratory Analysis ................................................................................................... 2  5.2 Field Parameter Results .......................................................................................... 2  5.3 Laboratory Results .................................................................................................... 2  6.0 GROUNDWATER CHARACTERIZATION ...................................................................... 2  7.0 CONCLUSIONS .......................................................................................................... 3  FIGURE Figure 1 Washington County Landfill Site Map Figure 2 Potentiometric Surface Map TABLES Table 1 Groundwater Elevation Data Table 2 Field Parameter Results Table 3 Detected Constituents APPENDICES Appendix A Well Logs Appendix B Laboratory Analytical Reports Appendix C Organic Constituent Results - Graphs DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Washington County Closed MSW Landfill September 2017 Groundwater Monitoring Report December 2017 Table of Contents Page ii This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Washington County Closed MSW Landfill September 2017 Groundwater Monitoring Report December 2017 Page 1 1.0 INTRODUCTION The Washington County Closed unlined, Municipal Solid Waste (MSW) Landfill, operating under Solid Waste Permit #94-02-MSWLF-1980, is required to conduct semi-annual groundwater monitoring in accordance with Solid Waste Section Rule 15A NCAC 13B.0500 (et seq.). This report presents the semi-annual sampling results for the event conducted on September 18, 2017; and includes a field procedure summary, laboratory analyses and groundwater characterization for the site. The laboratory analytical results and a single-day potentiometric surface map are also included. 2.0 REGIONAL GEOLOGY The Washington County Landfill is located near Roper, North Carolina. According to the Geologic Map of North Carolina (USGS, 1985) this site is underlain by Quaternary surficial deposits that include sand, gravel, clay and peat deposited in marine, fluvial, eolian and lacustrine environments; typical for a coastal plain environment. 3.0 SAMPLING LOCATIONS The groundwater monitoring network consists of four wells (MW-1 through MW-4) positioned around the landfill perimeter (Figure 1). MW-1 and MW-4 serve as the background wells for this site. Wells were advanced to approximately 25 feet below ground surface. Boring logs are presented in Appendix A. Well construction details are provided in Table 1. 4.0 SAMPLING PROCEDURES The sampling event, reportedly performed by Environment 1, Inc. on September 18, 2017, included sample collection from four groundwater monitoring wells (MW-1 through MW-4). Well logs are presented in Appendix A. No surface water monitoring locations are identified for this site. A trip blank was analyzed for Appendix I volatile organic compounds (VOCs) for quality control purposes. Sampling methods followed the protocol outlined in the North Carolina Water Quality Monitoring Guidance Document for Solid Waste Facilities (North Carolina Department of Environment and Natural Resources, Division of Waste Management1). The depth to water in each well was gauged prior to purging and sampling. Field measurements for pH, specific conductivity and temperature were recorded for each well. Samples were collected in laboratory prepared containers for the specified analytical procedures. Groundwater samples were properly preserved, placed on ice and transported to the laboratory facility within the specified holding times for each analysis. 1 Solid Waste Section Guidelines for Groundwater. Soil, and Surface Water Sampling, NC DENR, DWM, SWS, Rev 4- 08. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Washington County Closed MSW Landfill September 2017 Groundwater Monitoring Report December 2017 Page 2 5.0 FIELD & LABORATORY DATA 5.1 Laboratory Analysis The groundwater samples were transported to Environment 1, Inc., in Greenville, NC, a North Carolina certified laboratory (NC Wastewater ID #10). Samples were analyzed for the Appendix I VOCs via United States Environmental Protection Agency (EPA) Test Method 8260B and metals via EPA Test Method 200.8. Constituents detected between the Method Detection Limit (MDL) and Solid Waste Section Quantitation Limit (SWSL) are defined by the laboratory as “J” qualified values; indicating they are not quantifiable values. The laboratory analytical report is included as Appendix B. 5.2 Field Parameter Results Temperature, pH and specific conductance were measured in the field at the time of sampling. The field parameter results are summarized in Table 2 and have remained consistent with previously reported sampling events. 5.3 Laboratory Results Only arsenic in MW-2 was reported above its 2L Standard in collected samples this event. The majority of inorganic parameters were non-detectable or J-qualified. Arsenic has been at or below the 2L standard in previous events. No organic constituents were reported above their 2L Groundwater Standards from samples collected this event. . Detected constituents are presented in Table 3. Historical detected organic constituent graphs are included in Appendix C. 6.0 GROUNDWATER CHARACTERIZATION A single-day potentiometric surface map was prepared from groundwater data collected during this sampling event; from both the closed MSW landfill and the adjacent Construction and Demolition (C&D) landfill. The groundwater elevations indicate that groundwater flows in a general north - northwesterly direction. Hydraulic conductivity data is not available for these wells so groundwater velocities could not be calculated. The potentiometric surface map is presented as Figure 2. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Washington County Closed MSW Landfill September 2017 Groundwater Monitoring Report December 2017 Page 3 7.0 CONCLUSIONS Laboratory results indicate that water quality at the Washington County Closed MSW Landfill is generally consistent with reported historical detections. Arsenic concentrations in groundwater from monitoring well MW-2 were slightly above the groundwater standard for this constituent. No organic constituents were reported above their 2L values this event. Chlorobenzene, 1,4- dichlorobenzene and benzene concentrations in MW-2 and MW-3 are below their 2L groundwater standards and within the range of historic detections. The next groundwater monitoring event is scheduled for March 2018. Results will be reported to NCDEQ following laboratory analysis. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Washington County Closed MSW Landfill September 2017 Groundwater Monitoring Report December 2017 Page 4 This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F FIGURE September 2017 Groundwater Monitoring Report Washington County Closed MSW Landfill NC Solid Waste Permit No. 94-02-MSWLF-1980 DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F G:\CAD\Washington County\Wash 08-2\sheets\WASH-B0061.dwg - 11/21/2017 11:15 AMDRAWN:APPROVED:PROJECT NO:SCALE:FILENAME:DATE:FIGURE NO.PREPARED BY:PREPARED FOR:SMITH14 N. Boylan Avenue, Raleigh NC 27603NC LIC. NO. F-1370 (ENGINEERING)919.828.0577GARDNER+© 2017 Smith Gardner, Inc.WASHINGTON COUNTYMSW AND C&D LANDFILLSSITE MAPSEPTEMBER 2017J.A.L.M.M.G.AS SHOWN1Nov 2017WASH 08-2WASH-B0061DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F CD-1 TOC=7.81 DTW=6.21 GWE=1.60 CD-2TOC=7.68 DTW=5.81 GWE=1.87 CD-3 TOC=7.77 DTW=5.51 GWE=2.26 CD-4 TOC=9.11 DTW=6.69 GWE=2.42 MW-1 TOC=10.01 DTW=7.48 GWE=2.53 MW-2 TOC=9.70 DTW=9.50 GWE=0.20 MW-3 TOC=11.30 DTW=8.95 GWE=2.35 MW-4 TOC=9.02 DTW=6.31 GWE=2.71 G:\CAD\Washington County\Wash 08-2\sheets\WASH-B0061.dwg - 11/27/2017 1:58 PMDRAWN:APPROVED:PROJECT NO:SCALE:FILENAME:DATE:FIGURE NO.PREPARED BY:PREPARED FOR:SMITH14 N. Boylan Avenue, Raleigh NC 27603NC LIC. NO. F-1370 (ENGINEERING)919.828.0577GARDNER+© 2017 Smith Gardner, Inc.WASHINGTON COUNTYMSW AND C&D LANDFILLSPOTENTIOMETRIC SURFACE MAPSEPTEMBER 2017J.A.L.M.M.G.AS SHOWN1Nov 2017WASH 08-2WASH-B0061MW-1 TOC= DTW= GWE= DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F TABLES September 2017 Groundwater Monitoring Report Washington County Closed MSW Landfill NC Solid Waste Permit No. 94-02-MSWLF-1980 DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Table 1Groundwater Elevation DataWashington County MSW LadnfillSeptember 18, 2017By: CBDate: 12/5/2017WellWell Installation DateLatitude LongitudeWell Diameter (inches)Total Well Depth (feet bgs)Ground Surface Elevation (feet amsl)TOC Elevation (feet amsl)Depth to Water (feet)Groundwater Elevation (feet)Screen Interval (feet bgs)Screen GeologyMW-1 6/29/1989 35.9186669 76.66470642 2.0 27.0 7.30 10.01 7.48 2.53 8-23 sandMW-2 6/28/1989 35.9218076 76.66665444 2.0 27.0 7.23 9.70 9.50 0.20 5-20 sandMW-3 6/29/1989 35.9189837 76.67063239 2.0 25.0 8.51 11.30 8.95 2.35 8-23 sandMW-4 6/28/1989 35.9171607 76.66845219 2.0 26.5 6.25 9.02 6.31 2.71 4-24 sandNOTE:1. Well locations and elevations provided by Sanborn, Charlotte, NC from field survey conducted on 4/8/09.2. Depth to Water measured from top of PVC casing.3. Depth to water obtained from Environment 1 Laboratory Report dated 11/1/2017, Client #6018.H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Washington Co, NC\MSW\20. Sept 2017\sept17-Wash Co MSW tables.xlsxDocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Table 2Field Parameter ResultsWashington County MSW LandfillSeptember 18, 2017By: CBDate: 12/5/2017Specific Conductivity(umhos/cm)MW-1 5.2 283 22MW-2 6.3 871 23MW-3 5.8 146 20MW-4 5.6 112 21NOTE:Data from Environment 1 laboratory report dated 11/1/2017, Client ID# 6018.Well pH (Std units)Temperature (Celsius)H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Washington Co, NC\MSW\20. Sept 2017\sept17-Wash Co MSW tables.xlsxDocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Table 3Detected ConstituentsWashington County MSW LandfillSeptember 18, 2017By: CBDate: 12/5/2017Parameter MDL SWSL 2L MCL MW-1 MW-2 MW-3 MW-4InorganicArsenic 0.07 10 10 10 0.60J142.3J 1.7JBarium 0.07 100 700 200 65.0J 236 16.5J 41.2JCadmium 0.08 1 2 5 0.19J 0.18J <0.08 0.24JTotal Chromium 0.08 10 10 100 <0.08 3.9J <0.08 2.4JLead 0.08 10 15 1300 <0.08 <0.08 <0.08 2.8JSelenium 0.51 10 20 50 0.70J 0.92J <0.51 <0.51OrganicBenzene 0.24 115<0.24 0.30J <0.24 <0.24Chlorobenzene 0.30 3 50 100 <0.30 12.90 1.30J <0.30Chloroform 0.25 5 70 70 <0.25 <0.25 <0.25 0.80JNOTE:MDL -Method Detection LimitSWSL -Solid Waste Section Quantitation Limit2L-Groundwater Standard (15A NCAC 2L 0200)MCL - Federal Maximum Contaminant Level<MDL -Not detected at or above MDLBold -Constituent reported above 2L standardJ-Identified by Laboratory as detected between MDL and SWSL limitStandards and Results are presented in ug/l.Data from Environment 1 laboratory report dated 11/1/2017, Client ID# 6018.H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Washington Co, NC\MSW\20. Sept 2017\sept17-Wash Co MSW tables.xlsxDocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Appendix A Well Logs September 2017 Groundwater Monitoring Reports Washington County Closed MSW Landfill NC Solid Waste Permit No. 94-02-MSWLF-1980 DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Appendix B Laboratory Analytical Reports September 2017 Groundwater Monitoring Reports Washington County Closed MSW Landfill NC Solid Waste Permit No. 94-02-MSWLF-1980 DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F Appendix C Historical Organic Constituent Graphs September 2017 Groundwater Monitoring Report Washington County Closed MSW Landfill NC Solid Waste Permit No. 94-02-MSWLF-1980 DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F This page intentionally left blank. DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F 0246810121416Sp-'08 Fall-'08 Sp-'09 Fall-'09 Sp-'10 Fall-'10 Sp-'11 Fall-'11 Sp-'12 Fall-'12 Sp-'13 Fall-'13 Sp-'14 Fall-'14 Sp-'15 Fall-'15 Sp-'16 Fall-'16Sp-'17 Fall-'17ug/lDate SampledWashington County MSW LandfillMW-2 Historic Organic Detection DataBenzene1, 4-DichlorobenzeneChlorobenzeneBenzene 2L1,4-Dichlorobenzen 2L*chlorobenze 2L = 50 (not shown)DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F 051015202530354045Sp-'08 Fall-'08Sp-'09 Fall-'09Sp-'10 Fall-'10Sp-'11 Fall-'11Sp-'12 Fall-'12Sp-'13 Fall-'13Sp-'14 Fall-'14Sp-'15 Fall-'15Sp-'16 Fall-'16Sp-'17 Fall-'17ug/lDate SampledWashington County MSW LandfillMW-3 Historic Organic Detection DataBenzene1, 4-DichlorobenzeneChlorobenzeneBenzene 2L1,4-Dichlorobenzen 2L*chlorobenze 2L = 50 (not shown)DocuSign Envelope ID: 639D5F31-5A95-442D-B245-0D52B5E9009F