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HomeMy WebLinkAbout4204_HalifaxClosedMSWLF_GWMR_DIN27854_20160208This page intentionally left blank. February 2016 Groundwater Monitoring Report Halifax County Closed MSW Landfill NC Solid Waste Permit No. 42-04 Prepared for: Halifax County Solid Waste Department P.O. Box 70 Halifax, North Carolina 27839 April 2016 Prepared by: © 2016 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. This page intentionally left blank. This page intentionally left blank. Halifax County Closed MSW Landfill February 2016 Groundwater Monitoring Report April 2016 Page i Halifax County Closed MSW Landfill NC Solid Waste Permit No. 42-04 February 2016 Groundwater Monitoring Report Table of Contents Page 1.0 INTRODUCTION ......................................................................................................... 1  2.0 SITE HYDROGEOLOGY ................................................................................................ 1  3.0 SAMPLING LOCATIONS ............................................................................................. 2  4.0 SAMPLING PROCEDURES ......................................................................................... 2  5.0 FIELD & LABORATORY RESULTS .............................................................................. 2  5.1 Field Results .............................................................................................................. 2  5.2 Laboratory Analysis ................................................................................................... 2  5.3 Laboratory Results .................................................................................................... 3  5.3.1 Inorganic Constituents .................................................................................. 3  5.3.2 Organic Constituents .................................................................................... 3  5.3.3 Surface Water Results .................................................................................. 3  5.3.4 MNA Constituents ......................................................................................... 4  6.0 GROUNDWATER CHARACTERIZATION ...................................................................... 4  7.0 CONCLUSIONS .......................................................................................................... 4  FIGURE Figure 1 Groundwater Potentiometric Map TABLES Table 1 Groundwater Elevations Table 2 Field Parameters Table 3 Detected Inorganic Constituents Table 4 Detected Organic Constituents Table 5 Indicator Parameter Summary Table 6 Gradient and Velocity Calculations APPENDICES Appendix A Boring Logs Appendix B Laboratory Analytical Report Appendix C Time vs. Concentration Graphs Halifax County Closed MSW Landfill February 2015 Groundwater Monitoring Report April 2016 Page 2 This page intentionally left blank. Halifax County Closed MSW Landfill February 2015 Groundwater Monitoring Report April 2016 Page 1 1.0 INTRODUCTION The Halifax County Landfill, operating under Solid Waste Permit #42-04, is required to submit semi-annual groundwater monitoring reports (15A NCAC 13B .0544) for assessment monitoring. This report presents the results from the semi-annual monitoring event conducted February 8-9, 2016. The Halifax County Landfill is currently accepting C&D waste over the closed, unlined municipal solid waste (MSW) landfill. In December 1997 the landfill stopped accepting MSW; and the County is currently transferring MSW waste off-site to a lined landfill facility. The old landfill was closed per Solid Waste Regulations and a certification report was submitted to the Solid Waste Section (SWS) in September 1998. In 2007 an Assessment of Corrective Measures1 was prepared to evaluate previously detected groundwater quality issues as well as remedial options for the site. A Corrective Action Plan (CAP)2 for the site was approved June 8, 2009, and the Corrective Action Evaluation Report (CAER)3 was approved October 2012. Section 7.0 of this report provides an update regarding the current corrective action situation for this facility. This report presents a field procedure summary, laboratory analyses, groundwater characterization and summary tables and graphs. 2.0 SITE HYDROGEOLOGY According to the 1985 North Carolina Geological Map and Groundwater in the Halifax Area, North Carolina (Dept. of Conservation and Development Bulletin #51, 1946) the landfill is situated on the eastern edge of the Eastern Piedmont Physiographic Province; slightly west of the Coastal Plain overlap. Generally, Western Halifax County is underlain by felsic to intermediate, crystalline igneous and metamorphic rocks of early to late Paleozoic age. Eastern Piedmont rocks generally exhibit a northeastern strike and locally dip gently eastward due to regional metamorphism and folding that produced a broad plunging anticline. The area was simultaneously intruded by a number of felsic (granite) plutons. The granitic pluton underlying the landfill is the Butterwood Creek intrusion. Groundwater depths generally range from near surface level in the lowland areas along Brewer’s Creek and its tributary up to 45 ft. below grade along the ridge east of the landfill. Groundwater at the site flows generally west towards Brewer’s Creek and its tributary. There are minor seasonal variations in the flow pattern, but overall flow direction is consistent. 1 Richardson Smith Gardner and Associates, Inc., Assessment of Corrective Measures Halifax County Landfill 12/07. 2 Richardson Smith Gardner and Associates, Inc., Corrective Action Plan Halifax County Landfill 5/09. 3 Richardson Smith Gardner and Associates, Inc., Corrective Action Evaluation Report Halifax County Landfill 6/12 Halifax County Closed MSW Landfill February 2015 Groundwater Monitoring Report April 2016 Page 2 3.0 SAMPLING LOCATIONS The sampling event performed by Environment 1, Inc. utilized the groundwater monitoring network that includes thirteen monitoring wells (MW-1, MW-2A, MW-2AD, MW-3AS, MW-3D, MW-6D, MW-7D, MW-15R, MW-16A, MW-17, MW-18S, and MW-18D) located around the landfill perimeter, and three surface water sampling points (SW-1, SW-2 and SW-3) up and downstream of the landfill. Water level was also measured at two additional piezometer locations (BP-3 and BP-9) upgradient of the landfill. Figure 1 illustrates sampling locations. Boring logs for the groundwater monitoring wells are included in Appendix A. 4.0 SAMPLING PROCEDURES Sampling protocol is outlined in the North Carolina Water Quality Monitoring Guidance Document for Solid Waste Facilities (DENR, DWM) and the approved site Water Quality Monitoring Plan4. Each well was gauged to determine groundwater depth and then purged three to five well volumes or until dry. Depth to groundwater is presented in Table 1. Samples were collected by Environment 1 personnel 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 hold times for each analysis. Trip and equipment blanks were also analyzed for quality control. 5.0 FIELD & LABORATORY RESULTS 5.1 Field Results Temperature, pH, specific conductance, turbidity, oxygen reduction potential (ORP) and dissolved oxygen (DO) were measured at each well in the field at the time of sampling via direct read instruments. The field parameter results are summarized in Table 2. 5.2 Laboratory Analysis Samples were transported to Environment 1, Inc., in Greenville, NC, a North Carolina certified laboratory (NC Wastewater ID #10). Laboratory analysis included Appendix II metals and Volatile Organic Compounds (VOCs), pesticides, PCBs and semi-volatile organics analyzed via the EPA Test Method presented in the laboratory report. Designated wells (MW-2A, MW-2AD, MW-3AS, MW-3D, MW-6D, MW-17, MW-18S, MW- 18D and G-13 were also analyzed for indicator parameters by Solid Waste Section approved methods as reported on the laboratory report included in Appendix B. 4 Water Quality Monitoring Plan, Halifax County Landfill, Richardson Smith Gardner & Associates, May 2009. Halifax County Closed MSW Landfill February 2015 Groundwater Monitoring Report April 2016 Page 3 5.3 Laboratory Results Analytical results were compared to the NCDWM Solid Waste Section Quantitation Limits (SWSLs), 15A NCAC 2L.0200 (2L Standard), Groundwater Protection Standard (GWP) and the Federal Maximum Contaminant Limit (MCL). Constituent concentrations reported by the laboratory between the method detection limit (MDL) and SWSL are considered estimated values and are denoted with a “J” qualifier. Many constituents were either below the MDL or were non-quantifiable “J-values”. Time versus concentration graphs for the constituents detected above their respective 2L Standards are included in Appendix C. 5.3.1 Inorganic Constituents Iron (MW-2A, MW-2AD and MW-3AS) was the only inorganic constituent detected above its 2L or GWP Standard for this event. Cadmium was detected in MW-15R at its 2L concentration of 2 ug/l. Inorganic detections are summarized in Table 3. 5.3.2 Organic Constituents Six constituents were detected in samples at concentrations above their respective 2L Standards for this event:  Benzene (MW-2AD, MW-6D and MW-16A);  1,1-Dichloroethane (MW-2A, MW-2AD, MW-3AS, MW-3D, MW-16A and MW-18S);  1,2-Dichloropropane (MW-16A)  Tetrachloroethene (MW-2AD, MW-15R, MW-16A, and MW-17);  Trichloroethene (MW-2AD and MW-16A) and  Vinyl chloride (MW-2A, MW-2AD, MW-3AS, MW-16A and MW-18S). An organic detection summary is provided on Table 4. Several constituents, including tetrachloroethene and trichloroethene, are demonstrating an increasing trend in samples collected from MW-16A. Landfill gas is thought to be responsible due to the cross-gradient well location. 5.3.3 Surface Water Results Results from surface water sample analysis indicated no inorganic or organic constituents were detected above 2B Standards for Class C waters this event. Halifax County Closed MSW Landfill February 2015 Groundwater Monitoring Report April 2016 Page 4 5.3.4 MNA Constituents As part of the corrective action evaluation approved in 2012, full MNA parameter analysis is only completed every third year; it was last performed in 2015. For this event, the indicator parameters COD, chloride, total organic carbon and nitrogen were measured for designated MNA wells (listed in Section 5.2. Indicator parameter concentrations are presented in Table 5. 6.0 GROUNDWATER CHARACTERIZATION A potentiometric surface map was prepared using groundwater data from this sampling event. The data indicates that groundwater is flowing generally to the west towards Brewer’s Creek. This is consistent with groundwater flow patterns previously reported for the site. The potentiometric surface map is attached as Figure 1. Groundwater flow velocities during the sampling event were calculated for two monitoring wells using the equation: V = Ki/n where: K = hydraulic conductivity i = groundwater gradient n = porosity Groundwater flow velocities ranged from 0.020 ft/day (MW-16A) to 0.008 ft/day (MW-2A). These calculated flow velocities are included in Table 6. 7.0 CONCLUSIONS In general, the detected constituents are consistent with historically detected parameters. Groundwater chemistry in downgradient wells indicates anaerobic conditions. Dissolved methane levels in well samples indicate highly reduced, methanogenic, conditions. We will continue to watch groundwater chemistry in downgradient wells to follow the natural degradation processes. VOC concentrations in MW-16A continue to demonstrate an increasing trend. Due to this well’s location up/cross-gradient, the source of this increase may be landfill gas. A landfill gas flare was located on a nearby landfill gas vent within the waste in an effort to reduce landfill gas pressure in this area as part of the CAP. We will continue to watch the trends in this well. The next groundwater monitoring event is scheduled for August 2016. A groundwater monitoring report will be submitted to NCDENR after receipt and analysis of laboratory data. FIGURE August 2015 - Groundwater Monitoring Report Halifax County Closed MSW Landfill NC Solid Waste Permit No. 42-04 This page intentionally left blank. MW-2ADTOC=245.65DTW=5.11GWE=240.54 MW-6DTOC=253.22DTW=11.53GWE=241.69 MW-7DTOC=249.09DTW=2.90GWE=246.19 M W - 1 5 R T O C = 2 9 9 . 7 8 D T W = 2 7 . 4 8 G W E = 2 7 2 . 3 0 M W - 1 6 A T O C = 2 7 1 . 4 6 D T W = 4 . 2 2 G W E = 2 6 7 . 2 4 B P - 3 T O C = 3 0 0 . 5 0 D T W = 2 7 . 1 5 G W E = 2 7 3 . 3 5 B P - 9 T O C = 3 0 3 . 4 8 D T W = 2 4 . 0 4 G W E = 2 7 9 . 4 4 MW-17TOC=247.75DTW=6.26GWE=241.49MW-18STOC=244.52DTW=4.86GWE=239.66 MW-18DTOC=244.04DTW=4.50GWE=239.54 MW-2ATOC=246.43DTW=5.85GWE=240.58MW-3DTOC=251.73DTW=8.95GWE=242.78 MW-3ASTOC=251.57DTW=9.35GWE=241.26 MW-2ADTOC=245.65DTW=5.11GWE=240.54 MW-6DTOC=253.22DTW=11.53GWE=241.69 MW-7DTOC=249.09DTW=2.90GWE=246.19 M W - 1 5 R T O C = 2 9 9 . 7 8 D T W = 2 7 . 4 8 G W E = 2 7 2 . 3 0 M W - 1 6 A T O C = 2 7 1 . 4 6 D T W = 4 . 2 2 G W E = 2 6 7 . 2 4 B P - 3 T O C = 3 0 0 . 5 0 D T W = 2 7 . 1 5 G W E = 2 7 3 . 3 5 B P - 9 T O C = 3 0 3 . 4 8 D T W = 2 4 . 0 4 G W E = 2 7 9 . 4 4 MW-17TOC=247.75DTW=6.26GWE=241.49MW-18STOC=244.52DTW=4.86GWE=239.66 MW-18DTOC=244.04DTW=4.50GWE=239.54 MW-2ATOC=246.43DTW=5.85GWE=240.58MW-3ASTOC=251.57DTW=9.35G:\CAD\Halifax\Halifax-8\sheets\HALI-B0301.dwg - 4/18/2016 11:23 AM DRAWN:APPROVED: PROJECT NO: SCALE: FILENAME:DATE: FIGURE NO.PREPARED BY:PREPARED FOR: SMITH 14 N. Boylan Avenue, Raleigh NC 27603 NC LIC. NO. C-0828 (ENGINEERING) 919.828.0577 GARDNER+ © 2016 Smith Gardner, Inc. HALIFAX COUNTY CLOSED MSW LANDFILL POTENTIOMETRIC SURFACE MAP FEBRUARY 2016 C.T.J.M.M.G.AS SHOWN 1 Apr 2016 HALIFAX-8 HALI-B0301 M W - 1 0 M W - 1 T O C = D T W = G W E = B P - 3 Th i s p a g e i n t e n t i o n a l l y l e f t b l a n k . TABLES August 2015 – Groundwater Monitoring Report Halifax County Closed MSW Landfill Solid Waste Permit No. 42-04 This page intentionally left blank. Ta b l e 1 Gr o u n d w a t e r E l e v a t i o n s Ha l i f a x C o u n t y C l o s e d L a n d f i l l Fe b r u a r y 8 - 9 , 2 0 1 6 By: YD Date: 4/5/2016 Mo n i t o r i n g Lo c a t i o n We l l In s t a l l a t i o n Da t e La t i t u d e L o n g i t u d e We l l Di a m e t e r (i n c h e s ) To t a l W e l l De p t h ( f t . bg s ) Gr o u n d Su r f a c e El e v a t i o n ( f t . am s l ) TO C El e v a t i o n (f t ) De p t h t o Wa t e r (f t ) Wa t e r T a b l e El e v a t i o n ( f t ) Sc r e e n In t e r v a l (f t . b g s ) Screen Geology MW - 1 * N A 3 6 . 3 8 0 4 7 7 . 8 1 4 3 2 4 6 . 5 1 * * 3 2 1 . 1 8 32 3 . 1 8  27 . 2 5 2 9 4 . 9 6 N A N A MW - 2 A 0 7 / 2 6 / 1 9 9 5 3 6 . 3 7 3 1 7 7 . 8 1 4 1 2 1 4 2 4 6 . 4 3 2 4 6 . 4 3 5 . 8 5 2 4 0 . 5 8 4 - 1 4 S i l t & S a n d MW - 2 A D 0 9 / 0 1 / 1 9 9 9 3 6 . 3 7 3 2 7 7 . 8 1 4 0 2 4 0 2 4 5 . 6 5 2 4 5 . 6 5 5 . 1 1 2 4 0 . 5 4 3 0 - 4 0 Coarse Sandy PWR MW - 3 A S 0 7 / 2 5 / 1 9 9 5 3 6 . 3 7 2 3 7 7 . 8 1 3 4 2 1 9 2 4 8 . 5 7 25 1 . 5 7  9. 3 5 2 4 1 . 2 6 9 - 1 9 Clayey Silty Sand MW - 3 D N A 3 6 . 3 7 2 3 7 7 . 8 1 3 4 2 5 2 . 2 0 * * 2 5 1 . 7 3 2 5 1 . 7 3 8 . 9 5 2 4 2 . 7 8 N A N A MW - 6 D 1 0 / 3 0 / 1 9 9 1 3 6 . 3 7 4 2 7 7 . 8 1 4 4 2 4 0 2 5 3 . 2 2 2 5 3 . 2 2 1 1 . 5 3 2 4 1 . 6 9 25 - 4 0 Sandy Silt MW - 7 D 1 0 / 3 1 / 1 9 9 1 3 6 . 3 7 5 1 7 7 . 8 1 3 7 2 4 0 2 4 9 . 0 9 2 4 9 . 0 9 2 . 9 0 2 4 6 . 1 9 25 - 4 0 Sandy Silt MW - 1 5 R 0 8 / 3 1 / 1 9 9 9 3 6 . 3 7 4 4 7 7 . 8 1 0 6 2 4 3 2 9 9 . 7 8 2 9 9 . 7 8 2 7 . 4 8 2 7 2 . 3 0 3 3 - 4 3 Sandy Clayey Silt MW - 1 6 A 0 7 / 2 6 / 1 9 9 5 3 6 . 3 7 1 5 7 7 . 8 1 1 1 2 1 5 2 7 1 . 4 6 2 7 1 . 4 6 4 . 2 2 2 6 7 . 2 4 5 - 1 5 C l a y e y S a n d MW - 1 7 1 0 / 0 3 / 2 0 0 7 3 6 . 3 7 2 6 7 7 . 8 1 3 8 2 2 5 2 4 7 . 7 5 2 4 7 . 7 5 6 . 2 6 2 4 1 . 4 9 15 - 2 5 S a p r o l i t e MW - 1 8 S 1 0 / 1 6 / 2 0 0 7 3 6 . 3 7 3 0 7 7 . 8 1 4 4 2 1 8 2 4 4 . 5 2 2 4 4 . 5 2 4 . 8 6 2 3 9 . 6 6 8 - 1 8 Clayey Sand/Saprolite MW - 1 8 D 1 0 / 1 7 / 2 0 0 7 3 6 . 3 7 3 1 7 7 . 8 1 4 5 2 5 2 2 4 4 . 0 4 2 4 4 . 0 4 4 . 5 0 2 3 9 . 5 4 47 - 5 2 G r a n i t e BP - 3 N A 3 6 . 3 7 3 2 7 7 . 8 1 0 2 2 N M N A 3 0 0 . 5 0 2 7 . 1 5 2 7 3 . 3 5 N A N A BP - 9 N A 3 6 . 3 7 5 0 7 7 . 8 0 9 4 2 N M N A 3 0 3 . 4 8 2 4 . 0 4 2 7 9 . 4 4 N A N A NO T E : 1. ) * M W - 1 i s n o t u s e d i n t h e g r o u n d w a t e r c h a r a c t e r i z a t i o n c a l c u l a t i o n s d u e t o i t s r e m o t e l o c a t i o n f r o m t h e l a n d f i l l 2. ) * * W e l l d e p t h f r o m E n v i r o n m e n t 1 0 4 / 0 1 / 2 0 1 6 R e p o r t c l i e n t I D # 6 0 1 5 3. ) 3' s t i c k u p e s t i m a t e d , t h e r e f o r e g r o u n d w a t e r e l e v a t i o n i s a l s o e s t i m a t e d 4. ) N A = N o t A v a i l a b l e 5. ) N M = N o t M e a s u r e d H:\ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ H a l i f a x \ Y . H a l i f a x 2 - 2 0 1 6 \ C l o s e d M S W \ F e b 1 6 h a l g w t a b l e s . x ls x Ta b l e 2 Fi e l d P a r a m e t e r s Ha l i f a x C o u n t y C l o s e d L a n d f i l l Fe b r u a r y 8 - 9 , 2 0 1 6 By: YD Date: 4/5/2016 Mo n i t o r i n g Lo c a t i o n pH ( s t d un i t s ) Sp e c i f i c Co n d u c t i v i t y (u m h o s / c m ) Te m p e r a t u r e (o C) Tu r b i d i t y (N T U ) Di s s o l v e d Ox y g e n ( D O ) (m g / l ) Ox y g e n R e d u c t i o n Po t e n t i a l ( O R P ) (mv) MW - 1 5 . 3 3 2 1 4 1 3 0 7 . 6 1 5 5 MW - 2 A 6 . 1 3 3 0 1 3 5 . 6 3 . 9 9 3 1 MW - 2 A D 6 . 5 3 7 0 1 4 4 5 1 0 . 4 7 3 6 MW - 3 A S 6 . 2 9 4 1 1 3 3 2 0 2 . 7 3 3 2 MW - 3 D 6 . 2 2 3 9 1 4 2 2 1 . 8 8 - 2 5 MW - 6 D 6 . 1 5 2 3 1 4 1 5 0 . 9 1 5 7 MW - 7 D 5 . 9 4 7 1 1 8 . 3 7 . 2 5 4 0 MW - 1 5 R 5 . 3 6 4 1 5 4 . 4 6 . 8 8 5 3 MW - 1 6 A 5 . 8 1 9 4 1 2 6 5 3 . 2 5 1 7 MW - 1 7 6 . 1 1 6 5 1 2 2 9 0 . 4 3 2 2 MW - 1 8 S 6 . 5 2 5 5 1 1 2 2 0 0 . 2 9 6 9 MW - 1 8 D 6 . 3 2 0 2 1 1 1 . 6 0 . 8 4 5 1 SW - 1 6 . 8 1 1 5 8 N A N A N A SW - 2 6 . 7 3 1 3 7 N A N A N A SW - 3 6 . 6 8 9 7 N A N A N A NO T E : 1. F i e l d d a t a c o l l e c t e d b y E n v i r o n m e n t 1 p e r s o n n e l . 2. N A = N o t A n a l y z e d 3. L a b d a t a a n a l y s i s b y E n v i r o n m e n t 1 , I n c . R e p o r t s d a t e d 0 3 / 1 4 / 2 0 1 6 & 0 4 / 0 1 / 2 0 1 6 , C l i e n t I D # 6 0 1 5 H:\ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ H a l i f a x \ Y . H a l i f a x 2 - 2 0 1 6 \ C l o s e d M S W \ F e b 1 6 h a l g w t a b l e s . x ls x Ta b l e 3 De t e c t e d I n o r g a n i c C o n s t i t u e n t s Ha l i f a x C o u n t y C l o s e d L a n d f i l l Fe b r u a r y 8 - 9 , 2 0 1 6 By: YD Date: 4/5/2016 Mo n i t o r i n g Lo c a t i o n MD L S W S L 2L o r G W P * St a n d a r d MC L 2B St a n d a r d MW - 1 M W - 2 A M W - 2 A D M W - 3 A S M W - 3 D M W - 6 D M W - 7 D M W - 1 5 R M W - 1 6 A M W - 1 7 M W - 1 8 S M W - 1 8 D S W - 1 S W - 2 S W - 3 An t i m o n y 0 . 0 2 6 1 * 6 N E 0 . 8 5 J 0 . 1 4 J 0 . 2 4 J 0 . 1 2 J 0 . 2 3 J 0 . 2 2 J 0 . 4 3 J 0 . 6 8 J 0 . 3 6 J 0 . 1 7 J 0 . 2 6 J 0 . 2 1 J 0 . 0 6 J 0 . 1 2 J 0 . 8 6 J Ar s e n i c 0 . 1 4 1 0 1 0 1 0 1 0 < 0 . 1 4 1 . 5 J 0 . 4 8 J 2 . 1 J < 0 . 1 4 < 0 . 1 4 < 0 . 1 4 < 0 . 1 4 < 0 . 1 4 < 0 . 1 4 1 . 9 J < 0 . 1 4 < 0 . 1 4 < 0 . 1 4 < 0 . 1 4 Ba r i u m 0 . 0 1 1 0 0 7 0 0 2 0 0 0 1 , 0 0 0 5 8 . 7 J 1 7 4 8 6 . 5 J 8 8 . 0 J 8 1 . 4 J 4 0 9 3 4 . 7 J 4 3 . 2 J 1 3 3 3 9 . 1 J 1 1 4 6 0 . 3 J 1 5 . 7 J 3 1 . 7 J 2 3 . 9 J Be r y l l i u m 0 . 0 2 1 4 * 4 6 . 5 0 . 5 2 J 0 . 6 6 J 0 . 1 3 J 0 . 0 7 J 0 . 1 4 J 0 . 4 9 J 0 . 0 8 J 0 . 1 2 J 1 0 . 3 0 J 0 . 4 8 J < 0 . 0 2 0 . 0 2 J 0 . 0 8 J 0 . 0 5 J Ca d m i u m 0 . 0 1 1 2 5 2 1 0 . 1 7 J 0 . 1 4 J 0 . 1 2 J 0 . 3 3 J 0 . 3 9 J 0 . 0 6 J 2 0 . 4 0 J 0 . 0 9 J 1 0 . 0 8 J < 0 . 0 1 0 . 0 3 J 0 . 0 2 J Co b a l t 0 . 0 3 1 0 1 * N E N E 1 . 3 J 7 , 2 J 6 . 3 J 1 . 0 J 0 . 1 1 J 1 . 2 J 0 . 0 9 J 0 . 3 4 J 1 . 3 J 0 . 3 0 J 6 . 8 J < 0 . 0 3 0 . 1 6 J 0 . 5 6 J 0 . 3 6 J Ch r o m i u m , t o t a l 0 . 1 2 1 0 1 0 1 0 0 0 5 0 2 . 8 J 1 . 1 J 0 . 4 1 J 0 . 2 6 J 1 . 0 J 0 . 2 9 J 0 . 7 2 J 0 . 7 4 J 0 . 8 2 J 0 . 9 8 J 3 . 0 J 0 . 4 9 J 1 . 0 J 1 . 5 J 1 . 2 J Co p p e r 0 . 0 2 1 0 1 0 0 0 1 3 0 0 7 1 . 7 J 1 . 1 J 0 . 5 6 J 0 . 6 8 J 0 . 3 3 J 0 . 4 6 J 0 . 2 2 J 0 . 3 5 J 0 . 9 0 J 0 . 6 9 J 2 . 1 J 0 . 2 2 J 0 . 3 7 J 0 . 4 4 J 0 . 4 6 J Ir o n 8 . 6 4 3 0 0 3 0 0 3 0 0 * * 1 0 0 0 N A 39 7 8 8 2 2 4 9 1 9 9 7 2 2 29 3 J 80 6 NA N A N A 1138 2 5 6 0 4 95 J N A N A N A Le a d 0 . 0 3 1 0 1 5 1 5 2 5 4 . 3 J 1 . 6 J 0 . 4 2 J 0 . 3 5 J < 0 . 0 3 0 . 3 1 J 0 . 1 8 J 0 . 2 2 J 1 . 8 J 1 . 2 J 3 . 8 J < 0 . 0 3 0 . 1 6 J 0 . 2 7 J 0 . 3 1 J Me r c u r y 0 . 0 5 0 . 2 1 2 0 . 0 1 2 N A < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 N A < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 0 . 0 5 J N A N A N A N A Ni c k e l 0 . 0 1 5 0 1 0 0 N E 2 5 1 . 2 J 1 . 2 J 1 . 2 J 0 . 9 6 J 0 . 8 0 J 1 . 6 J 0 . 5 3 J 0 . 3 7 J 0 . 9 8 J 0 . 9 2 J 4 . 5 J 0 . 9 6 J 0 . 3 9 J 1 . 0 0 J 0 . 5 3 J Se l e n i u m 0 . 2 2 1 0 2 0 5 0 5 0 . 3 1 J 0 . 3 1 J < 0 . 2 2 0 . 3 5 J < 0 . 2 2 0 . 6 5 J < 0 . 2 2 < 0 . 2 2 < 0 . 2 2 < 0 . 2 2 < 0 . 2 2 < 0 . 2 2 < 0 . 2 2 1 . 7 J < 0 . 2 2 Si l v e r 0 . 0 1 1 0 2 0 1 0 0 0 0 . 1 8 J 0 . 0 2 J 0 . 2 3 J 0 . 0 9 J 0 . 0 4 J 0 . 0 2 J 0 . 0 2 J 0 . 1 4 J 0 . 2 0 J 0 . 0 7 J 1 . 6 J < 0 . 0 1 0 . 0 1 J < 0 . 0 1 0 . 0 6 J Th a l l i u m 0 . 0 2 6 2 . 8 * 2 0 . 4 7 0 . 0 9 J 0 . 0 7 J < 0 . 0 2 < 0 . 0 2 < 0 . 0 2 < 0 . 0 2 0 . 0 5 J 0 . 1 4 J 0 . 1 3 J 0 . 0 4 J 0 . 0 6 J < 0 . 0 2 0 . 0 6 J 0 . 0 6 J 0 . 0 3 J Ti n 0 . 0 6 1 0 0 2 0 0 0 * N E N E N A 0 . 3 7 J 0 . 1 0 J 0 . 1 0 J < 0 . 0 6 0 . 0 6 J N A 0 . 1 5 J 0 . 3 9 J 0 . 1 8 J 0 . 2 3 J N A N A N A N A Va n a d i u m 0 . 2 2 2 5 0 . 3 * N E N E 3 . 8 J 4 . 2 J < 0 . 2 2 0 . 8 0 J < 0 . 2 2 < 0 . 2 2 < 0 . 2 2 < 0 . 2 2 < 0 . 2 2 0 . 4 6 J 8 . 2 J < 0 . 2 2 1 . 9 J < 0 . 2 2 0 . 6 5 J Zi n c 0 . 2 0 1 0 1 0 0 0 5 0 0 0 * * 5 0 1 0 1 4 5 . 9 J 3 . 0 J 5 . 3 J 8 . 6 J 2 . 5 J 4 . 2 J 1 4 7 . 9 J 1 7 2 . 8 J 1 . 9 J 4 . 7 J 2 . 7 J NO T E S : MD L - Me t h o d D e t e c t i o n L i m i t SW S L - So l i d W a s t e S e c t i o n Q u a n t i t a t i o n L i m i t s 2L - Gr o u n d w a t e r S t a n d a r d s ( 1 5 A N C A C 2 L 0 2 0 0 ) GW P - Gr o u n d w a t e r P r o t e c t i o n S t a n d a r d s ( n o t e d b y * ) MC L - F e d e r a l M a x i m u m C o n t a m i n a n t L i m i t ** - N a t i o n a l S e c o n d a r y D r i n k i n g W a t e r S t a n d a r d s 2B - NC A C 2 B S t a n d a r d f o r C l a s s C w a t e r s Bo l d - De t e c t i o n a b o v e 2 L o r G W P S t a n d a r d J- La b o r a t o r y d e f i n e d d e t e c t i o n b e t w e e n M D L a n d S W S L l i m i t <M D L - No t d e t e c t e d a t o r a b o v e M D L v a l u e NA - P a r a m e t e r N o t a n a l y z e d NE - S t a n d a r d N o t E s t a b l i s h e d Ta b l e u n i t s a r e p r e s e n t e d i n u g / l . La b d a t a a n a l y s i s b y E n v i r o n m e n t 1 , I n c . R e p o r t s d a t e d 0 3 / 1 4 / 2 0 1 6 & 0 4 / 0 1 / 2 0 1 6 , C l i e n t I D # 6 0 1 5 H:\ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ H a l i f a x \ Y . H a l i f a x 2 - 2 0 1 6 \ C l o s e d M S W \ F e b 1 6 h a l g w t a b l e s . x ls x Th i s p a g e i n t e n t i o n a l l y l e f t b l a n k . Ta b l e 4 De t e c t e d O r g a n i c C o n s t i t u e n t s Ha l i f a x C o u n t y C l o s e d L a n d f i l l Fe b r u a r y 8 - 9 , 2 0 1 6 By:YD Date: 4/5/2016 Co n s t i t u e n t M D L S W S L 2L o r G W P * St a n d a r d MC L M W - 2 A M W - 2 A D M W - 3 A S M W - 3 D M W - 6 D M W - 1 5 R M W - 1 6 A M W - 1 7 M W - 1 8 S Be n z e n e 0 . 2 4 1 1 5 0 . 8 0 J 0 . 4 0 J 2. 6 0 0. 8 0 J 1. 2 <0 . 2 4 3.50 0.30 J < 0 . 2 4 BH C - B e t a 0 . 0 3 1 0 . 0 5 0 . 0 1 9 * N E < 0 . 0 3 1 < 0 . 0 3 1 < 0 . 0 3 1 < 0 . 0 3 1 0 . 0 3 6 J < 0 . 0 3 1 < 0 . 0 3 1 < 0 . 0 3 1 < 0 . 0 3 1 1, 1 - D i c h l o r o e t h a n e 0 . 2 0 5 6 N E 7. 9 0 1 0 . 2 0 1. 0 0 J 9. 3 0 <0 . 2 0 2 . 6 J 13.90 5.9 0 . 5 0 J 1, 1 - D i c h l o r o e t h e n e 0 . 1 7 5 7 7 0 . 4 0 J < 0 . 1 7 < 0 . 1 7 0 . 4 0 J < 0 . 1 7 < 0 . 1 7 0 . 6 0 J < 0 . 1 7 < 0 . 1 7 1, 2 - D i c h l o r o b e n z e n e 0 . 3 2 5 2 0 6 0 0 0 < 0 . 3 2 < 0 . 3 2 < 0 . 3 2 < 0 . 3 2 < 0 . 3 2 < 0 . 3 2 1 . 0 0 J < 0 . 3 2 < 0 . 3 2 1, 2 - D i c h l o r o p r o p a n e 0 . 2 1 1 0 . 6 5 < 0 . 2 1 < 0 . 2 1 0 . 3 0 J < 0 . 2 1 < 0 . 2 1 < 0 . 2 1 < 0 . 2 1 < 0 . 2 1 < 0 . 2 1 1, 4 - D i c h l o r o b e n z e n e 0 . 3 9 1 6 7 5 1 . 9 0 0 . 9 0 J 2 . 0 0 0 . 8 0 J 1 . 8 0 < 0 . 3 9 1 . 9 0 < 0 . 3 9 < 0 . 3 9 Di c h l o r o d i f l u o r o m e t h a n e 0 . 5 1 5 1 0 0 0 N E < 0 . 5 1 0 . 7 0 J < 0 . 5 1 0 . 7 0 J < 0 . 5 1 < 0 . 5 1 1 1 . 1 0 2 . 4 0 J < 0 . 5 1 Ci s - 1 , 2 - D i c h l o r o e t h e n e 0 . 2 5 5 7 0 7 0 6 . 0 0 1 9 . 6 0 < 0 . 2 5 1 5 . 6 0 1 . 1 0 J 0 . 8 0 J 5 0 . 6 0 5 . 7 0 0 . 3 0 J Ch l o r o b e n z e n e 0 . 3 0 3 5 0 1 0 0 3 . 0 0 0 . 5 0 J 3 . 9 0 0 . 8 0 J 4 . 2 < 0 . 3 0 1 . 4 0 J < 0 . 3 0 < 0 . 3 0 Ch l o r o e t h a n e 0 . 4 8 1 0 3 0 0 0 N E 0 . 6 0 J < 0 . 4 8 < 0 . 4 8 < 0 . 4 8 < 0 . 4 8 < 0 . 4 8 0 . 5 0 J < 0 . 4 8 < 0 . 4 8 Me t h y l e n e C h l o r i d e 0 . 6 4 1 5 5 < 0 . 6 4 < 0 . 6 4 < 0 . 6 4 < 0 . 6 4 < 0 . 6 4 < 0 . 6 4 1 . 6 0 < 0 . 6 4 < 0 . 6 4 Te t r a c h l o r o e t h e n e 0 . 1 7 1 0 . 7 5 < 0 . 1 7 0 . 5 0 J < 0 . 1 7 0 . 9 0 J < 0 . 1 7 1. 3 0 5 6 . 5 0 1 . 2 0 <0.17 Tr a n s - 1 , 2 D i c h l o r o e t h e n e 0 . 2 3 5 1 0 0 1 0 0 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 0 . 6 0 J < 0 . 2 3 < 0 . 2 3 Tr i c h l o r o e t h e n e 0 . 2 3 1 3 5 1 . 0 0 8. 0 0 <0 . 2 3 2 . 7 0 < 0 . 2 3 0 . 7 0 J 29.10 1.60 < 0 . 2 3 Tr i c h l o r o f l u o r o m e t h a n e 0 . 2 4 1 2 0 0 0 N E < 0 . 2 4 < 0 . 2 4 < 0 . 2 4 < 0 . 2 4 < 0 . 2 4 < 0 . 2 4 0 . 5 0 J < 0 . 2 4 < 0 . 2 4 Vi n y l C h l o r i d e 0 . 6 3 1 0 . 0 3 2 11 . 1 0 5 . 0 0. 8 0 J < 0 . 6 3 0 . 7 0 J < 0 . 6 3 1.1 0.70 J < 0 . 6 3 NO T E : MD L - Me t h o d D e t e c t i o n L i m i t SW S L - So l i d W a s t e S e c t i o n Q u a n t i t a t i o n L i m i t s . 2L - Gr o u n d w a t e r S t a n d a r d s ( 1 5 A N C A C 2 L 0 2 0 0 ) GW P - Gr o u n d w a t e r P r o t e c t i o n S t a n d a r d s ( n o t e d b y * ) MC L - F e d e r a l M a x i m u m C o n t a m i n a n t L i m i t Bo l d - De t e c t i o n a b o v e 2 L s t a n d a r d o r G W P s t a n d a r d J- La b o r a t o r y d e f i n e d d e t e c t i o n b e t w e e n t h e M D L a n d S W S L <M D L - No t d e t e c t e d a t o r a b o v e M D L NE - N o t E s t a b l i s h e d Ta b l e u n i t s a r e p r e s e n t e d i n u g / l . La b d a t a a n a l y s i s b y E n v i r o n m e n t 1 , I n c . R e p o r t s d a t e d 0 3 / 1 4 / 2 0 1 6 & 0 4 / 0 1 / 2 0 1 6 , C l i e n t I D # 6 0 1 5 H:\ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ H a l i f a x \ Y . H a l i f a x 2 - 2 0 1 6 \ C l o s e d M S W \ F e b 1 6 h a l g w t a b l e s . x ls x Ta b l e 5 In d i c a t o r P a r a m e t e r S u m m a r y Ha l i f a x C o u n t y C l o s e d L a n d f i l l Fe b r u a r y 8 - 9 , 2 0 1 6 By: MG Date: 4/14/2016 MD L S W S L M W - 2 A M W - 2 A D M W - 3 A S M W - 3 D M W - 6 D M W - 1 7 M W - 1 8 S M W - 1 8 D CO D , m g / l 2 0 N E 3 1 < 2 0 6 5 < 2 0 2 0 < 2 0 2 3 < 2 0 Ni t r a t e N i t r o g e n a s N , m g / l 0. 0 4 1 0 < 0 . 0 4 < 0 . 0 4 0 . 0 9 J 0 . 0 5 J < 0 . 0 4 0 . 1 6 J 0 . 0 6 J 0 . 0 9 J To t a l O r g a n i c C a r b o n , m g / l 0 . 0 8 5 N E 4 . 0 2 1 . 4 4 1 . 0 7 9 . 2 1 2 . 2 6 1 . 1 6 2 . 8 9 < 0 . 0 8 5 Ch l o r i d e , m g / l 5 N E 3 1 6 1 2 2 9 3 1 7 2 6 9 NO T E S : MD L - M e t h o d D e t e c t i o n L i m i t SW S L - S o l i d W a s t e S e c t i o n Q u a n t i t a t i o n L i m i t s J - L a b o r a t o r y d e f i n e d d e t e c t i o n b e t w e e n t h e M D L a n d S W S L <M D L - N o t d e t e c t e d a t o r a b o v e M D L v a l u e NE - S t a n d a r d N o t E s t a b l i s h e d Ta b l e p r e s e n t e d i n u n i t s o f u g / l u n l e s s o t h e r w i s e n o t e d La b d a t a a n a l y s i s b y E n v i r o n m e n t 1 , I n c . R e p o r t s d a t e d 0 9 / 1 7 / 2 0 1 5 & 1 0 / 1 / 2 0 1 5 , C l i e n t I D # 6 0 1 5 ; a n d Mi c r o s e e p s R e p o r t D a t e d 1 0 / 1 0 / 2 0 1 5 H:\ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ H a l i f a x \ Y . H a l i f a x 2 - 2 0 1 6 \ C l o s e d M S W \ F e b 1 6 h a l g w t a b l e s . x ls x Ta b l e 6 Gr a d i e n t a n d V e l o c i t y C a l c u l a t i o n s Ha l i f a x C o u n t y C l o s e d L a n d f i l l Fe b r u a r e y 8 - 9 , 2 0 1 6 By: MG Date: 4/18/2016 Mo n i t o r i n g Lo c a t i o n Wa t e r Ta b l e El e v a t i o n (f t ) Hy d r a u l i c Co n d u c t i v i t y (f t / d a y ) As s u m e d Po r o s i t y Hy d r a u l i c Gr a d i e n t (f t / f t ) Gr o u n d w a t e r Ve l o c i t y ( f t / d a y ) MW - 2 A 2 4 0 . 5 8 1 . 8 3 5 0 . 2 0 . 0 0 8 0 . 0 7 6 MW - 1 6 A 2 6 7 . 2 4 0 . 0 5 7 0 . 2 0 . 0 6 9 0 . 0 2 0 NO T E : Hy d r a u l i c C o n d u c t i v i t y d a t a f r o m s l u g t e s t s p e r f o r m e d b y G . N . R i c h a r d s o n a n d A s s o c i a t e s i n 1 9 9 7 . Po r o s i t y v a l u e s a s s u m e d f r o m G r o u n d w a t e r & W e l l s ( D r i s c o l l ) Ve l o c i t y C a l c u l a t e d f r o m V = K * i / n V = v e l o c i t y K = H y d r a u l i c C o n d u c t i v i t y i = G r a d i e n t n = P o r o s i t y De e p w e l l s n o t u s e d i n v e l o c i t y c a l c u l a t i o n s H: \ P r o j e c t s \ G r o u n d w a t e r M o n i t o r i n g \ 2 . G r o u n d w a t e r M o n i t o r i n g R e p o r t s \ H a l i f a x \ Y . H a l i f a x 2 - 2 0 1 6 \ C l o s e d M S W \ F e b 1 6 h a l g w t a b l e s . x ls x Th i s p a g e i n t e n t i o n a l l y l e f t b l a n k . Appendix A Boring Logs August 2015 – Groundwater Monitoring Report Halifax County Closed MSW Landfill Solid Waste Permit No. 42-04 This page intentionally left blank. This page intentionally left blank. Appendix B Laboratory Analytical Report August 2015 – Groundwater Monitoring Report Halifax County Closed MSW Landfill NC Solid Waste Permit No. 42-04 This page intentionally left blank. This page intentionally left blank. Appendix C Time vs. Concentration Graphs August 2015 – Groundwater Monitoring Report Halifax County Closed MSW Landfill NC Solid Waste Permit No. 42-04 This page intentionally left blank. Pa g e 1 1, 1 - D i c h l o r o e t h a n e Mu l t i - W e l l T i m e - S e r i e s G r a p h Sa m p l e D a t e C o n c e n t r a t i o n ( p p b ) 0510152025303540 MW - 1 6 A MW - 2 A MW - 2 A D MW - 3 D 8 / 9 / 1 9 9 5 7 / 1 3 / 1 9 9 8 6 / 1 7 / 2 0 0 1 5 / 2 2 / 2 0 0 4 4 / 2 7 / 2 0 0 7 4 / 1 / 2 0 1 0 3/6/2013 2/9/2016 Pa g e 1 Be n z e n e Mu l t i - W e l l T i m e - S e r i e s G r a p h Sa m p l e D a t e C o n c e n t r a t i o n ( p p b ) 012345 MW - 1 6 A MW - 6 D MW - 3 A S 8 / 9 / 1 9 9 5 7 / 1 3 / 1 9 9 8 6 / 1 7 / 2 0 0 1 5 / 2 2 / 2 0 0 4 4 / 2 7 / 2 0 0 7 4 / 1 / 2 0 1 0 3/6/2013 2/9/2016 Pa g e 1 Te t r a c h l o r o e t h e n e ( - e t h y l e n e ) Mu l t i - W e l l T i m e - S e r i e s G r a p h Sa m p l e D a t e C o n c e n t r a t i o n ( p p b ) 01020304050607080 MW - 1 6 A MW - 1 5 R MW - 1 7 8 / 9 / 1 9 9 5 7 / 1 3 / 1 9 9 8 6 / 1 7 / 2 0 0 1 5 / 2 2 / 2 0 0 4 4 / 2 7 / 2 0 0 7 4 / 1 / 2 0 1 0 3/6/2013 2/9/2016 Pa g e 1 Tr i c h l o r o e t h e n e ( - e t h y l e n e ) Mu l t i - W e l l T i m e - S e r i e s G r a p h Sa m p l e D a t e C o n c e n t r a t i o n ( p p b ) 0510152025303540 MW - 1 6 A MW - 2 A D 8 / 9 / 1 9 9 5 7 / 1 3 / 1 9 9 8 6 / 1 7 / 2 0 0 1 5 / 2 2 / 2 0 0 4 4 / 2 7 / 2 0 0 7 4 / 1 / 2 0 1 0 3/6/2013 2/9/2016 Pa g e 1 Vi n y l c h l o r i d e Mu l t i - W e l l T i m e - S e r i e s G r a p h Sa m p l e D a t e C o n c e n t r a t i o n ( p p b ) 051015202530 MW - 1 6 A MW - 2 A MW - 2 A D 8 / 9 / 1 9 9 5 7 / 1 3 / 1 9 9 8 6 / 1 7 / 2 0 0 1 5 / 2 2 / 2 0 0 4 4 / 2 7 / 2 0 0 7 4 / 1 / 2 0 1 0 3/6/2013 2/9/2016 Pa g e 1 Ir o n , t o t a l Mu l t i - W e l l T i m e - S e r i e s G r a p h Sa m p l e D a t e C o n c e n t r a t i o n ( p p b ) 0 50 0 0 0 10 0 0 0 0 15 0 0 0 0 20 0 0 0 0 25 0 0 0 0 30 0 0 0 0 MW - 2 A MW - 2 A D MW - 6 D MW - 1 7 MW - 1 8 S MW - 3 A S 8 / 1 9 / 2 0 0 9 7 / 2 2 / 2 0 1 0 6 / 2 5 / 2 0 1 1 5 / 2 8 / 2 0 1 2 5 / 1 / 2 0 1 3 4 / 4 / 2 0 1 4 3/8/2015 2/9/2016