Loading...
HomeMy WebLinkAbout2906_DavidsonPhase1_GWMR_DIN28293_20160921This page intentionally left blank. September 2016 Semi-Annual Groundwater Monitoring Report Davidson County Phase 1 Lined Landfill NC Solid Waste Permit No. 29-06 Prepared for: Davidson County Integrated Solid Waste 1242 Old Highway 29 Thomasville, North Carolina 27360-0024 December 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 upon by the client and Smith Gardner, Inc. This page intentionally left blank. This page intentionally left blank. Davidson County Phase 1 Lined Landfill September 2016 Groundwater Monitoring Report December 2016 Table of Contents Page i Davidson County Phase 1 Lined Landfill NC Solid Waste Permit No. 29-06 September 2016 Groundwater Monitoring Report Table of Contents Page 1.0 INTRODUCTION ......................................................................................................... 1  2.0 SITE GEOLOGY ........................................................................................................... 1  3.0 SAMPLING LOCATIONS ............................................................................................. 1  4.0 SAMPLING PROCEDURES ......................................................................................... 1  5.0 FIELD & LABORATORY RESULTS .............................................................................. 2  5.1 Field Results .............................................................................................................. 2  5.2 Laboratory Analysis ................................................................................................... 2  5.2.1 Inorganic Constituents .................................................................................. 2  5.2.2 Organic Constituents .................................................................................... 3  5.2.3 Surface Water Results .................................................................................. 3  5.2.4 Leachate Analysis ......................................................................................... 3  6.0 STATISTICAL ANALYSIS ............................................................................................ 3  7.0 GROUNDWATER CHARACTERIZATION ...................................................................... 3  8.0 CONCLUSIONS .......................................................................................................... 4  FIGURE Figure 1 Potentiometric Surface Map TABLES Table 1 Groundwater Elevations Table 2 Field Parameters Table 3 Detected Constituents Table 4 Leachate Analytical Data Table 5 Aquifer Conductivity and Velocity Calculations APPENDICES Appendix A Monitoring Well Information Appendix B Laboratory Analytical Report Appendix C Time vs. Concentration Graphs This page intentionally left blank. Davidson County Phase 1 Lined Landfill September 2016 Groundwater Monitoring Report December 2016 Page 1 1.0 INTRODUCTION Smith Gardner, Inc. (S+G) was contracted by Davidson County to perform their semi-annual groundwater monitoring at the Davidson County Phase 1 Lined Landfill, permit number 29-06, as required by 15A NCAC 13B .1600. Sampling was conducted September 19-20, 2016. This report summarizes the event sampling procedures, field and laboratory results and groundwater characterization as required by NC Solid Waste Regulations. Summary tables, a potentiometric map and the laboratory analytical report are also included. 2.0 SITE GEOLOGY The Davidson County Landfill facility is located in the Piedmont Physiographic Province of North Carolina approximately three and a half miles northeast of the City of Lexington, NC. The Geologic Map of North Carolina (USGS, 1985) indicates that the site lies at the western margin of the Carolina Slate Belt; an area of predominantly volcanic and sedimentary rocks of Late Proterozoic to Cambrian age that have been metamorphosed and intruded by numerous igneous plutons. The boundary zone between the Carolina Slate Belt and the adjacent Charlotte Belt is known as the Gold Hill/Silver Hill shear zone. The site vicinity is underlain by volcanic rocks from the Flat Swamp Member of the Cid Formation and metavolcanic rocks of the Battleground Formation. 3.0 SAMPLING LOCATIONS The groundwater monitoring network for the Davidson County Phase 1 includes thirteen monitoring wells (MW-1S, MW-2, MW-3, MW-4, MW-5, MW-6, MW-7S, MW-7D, MW-8, MW-9A, MW-10, MW-11 and MW-12), two surface water locations (SW-1 and SW-2) and one leachate location (Leachate). MW-1S is the upgradient well for the site1. SW-1 is the upstream surface water location; SW-2 is located on Jimmy’s Creek downstream of the landfill. Both SW-1 and SW-2 were dry this event. A trip and equipment blank were submitted for quality control purposes. Sampling locations are shown in Figure 1. Available well logs are provided in Appendix A. 4.0 SAMPLING PROCEDURES Sampling procedures followed the protocols set forth in the site’s Water Quality Monitoring Plan2 and the North Carolina Water Quality Monitoring Guidance Document for Solid Waste Facilities (North Carolina Department of Environment and Natural Resources, Division of Waste Management). S+G personnel gauged each well to determine groundwater depth and purged three to five well volumes or until dry. Groundwater elevations are provided in Table 1. 1 MW-1S is also the upgradient well associated with the Holly Grove Landfill. 2 Davidson County Water Quality Monitoring Plan, G.N. Richardson and Associates, June 1999. Davidson County Phase 1 Lined Landfill September 2016 Groundwater Monitoring Report December 2016 Page 2 Environment 1, Inc. (NC Laboratory Certification #10) provided laboratory prepared sample 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. Sampling wells and locations were inspected and found to be in good condition and free of obstructions. 5.0 FIELD & LABORATORY RESULTS 5.1 Field Results Temperature, pH, specific conductance and turbidity were measured in the field at the time of sampling via direct read instruments. The field parameter results are summarized in Table 2 and remain consistent with previously reported sampling events. 5.2 Laboratory Analysis Samples were transported to Environment 1, Inc., in Greenville, NC for analysis. Laboratory analyses for groundwater included metals via EPA Test Methods 200.7, 200.8 and 245.1 and Appendix I Volatile Organic Compounds (VOCs) via EPA Test Method 8260B. The sample from MW-1S was also analyzed for alkalinity, chloride, total dissolved residue, and sulfate by the approved method presented in the laboratory report. Leachate samples were also sampled for BOD, COD, nitrate nitrogen, total phosphorus and sulfate via Solid Waste Section (SWS) approved methods listed in the laboratory report. Analytical results were compared to the NC DWM Solid Waste Section Quantitation Limits (SWSLs), 15A NCAC 2L.0200 (2LStandard), SWS established Groundwater Protection (GWP) Standards and the Federal Maximum Contaminant Limits (MCLs). Surface water results were compared with the NCAC 2B Standard for Class C waters (2B Standards). Most constituents were reported either below the method detection limits (MDL) or were “J-values” indicating a non-quantifiable value, defined by the laboratory as between the MDL and the SWSL. The laboratory results are presented in Appendix B. 5.2.1 Inorganic Constituents The following constituents were detected above the 2L or GWP standards:  Barium (MW-7s);  Chromium (MW-7s);  Cobalt (MW-7s); and  Vanadium (MW-3, and MW-11). Davidson County Phase 1 Lined Landfill September 2016 Groundwater Monitoring Report December 2016 Page 3 The sample from background well MW-1S exceeded the 2L Standard for the indicator parameter total dissolved residue. Inorganic detections are provided in Table 3. 5.2.2 Organic Constituents No organic constituents were reported above their 2L Standards in samples collected this event. Organic detections are provided in Table 3. 5.2.3 Surface Water Results Samples were not collected from SW-1 and SW-2 because they were dry at the time of sampling. 5.2.4 Leachate Analysis Leachate samples were collected from the leachate collection system. A summary of constituents detected in the leachate is included as Table 4. 6.0 STATISTICAL ANALYSIS No statistical analyses were performed on the analytical data based on the latest version of 15A NCAC 13B.1632 and .1633 effective April 1, 2011. Time vs. concentration graphs for constituents detected above their 2L or GWP Standards are included as Appendix C. 7.0 GROUNDWATER CHARACTERIZATION A potentiometric surface map was prepared from groundwater data from this sampling event. Groundwater flow velocities for this sampling event were calculated for monitoring wells using the equation: V = Ki/n where: K = hydraulic conductivity i = groundwater gradient n = porosity Groundwater velocities in the uppermost aquifer ranged from 0.0644 feet/day (MW-1S) to 1.2184 feet/day (MW-11) and averaged 0.3004 feet/day. Calculations are included in Table 5. Groundwater elevations indicate the flow direction is generally north and northwest across the site; which is consistent with historically reported groundwater flow patterns. The potentiometric surface map is included as Figure 1. Davidson County Phase 1 Lined Landfill September 2016 Groundwater Monitoring Report December 2016 Page 4 8.0 CONCLUSIONS The analytical results for the Phase 1 lined landfill are consistent with reported historic inorganic detections; are likely due to variations in these naturally occurring constituents and are not indicative of groundwater impact from the landfill. The next groundwater monitoring event is tentatively scheduled for March 2017. An analytical results summary will be submitted to DEQ for this event. FIGURES September 2016 Groundwater Monitoring Report Davidson County Phased 1 Lined Landfill NC Solid Waste Permit No. 29-06 This page intentionally left blank. MW-1STOC= 736.20 DTW= 54.19 GWE= 682.01 MW-1D CDMW-2 CDMW-3TOC= 685.00 DTW= 15.72 GWE= 669.28 *MW-2 TOC= 708.29 DTW= DRY MW-3 TOC= 666.72 DTW= 13.54 GWE= 653.18 MW-4 TOC= 736.20 DTW= 54.19 GWE= 682.01 MW-5TOC= 678.23 DTW= 26.70 GWE= 651.53 MW-6 TOC= 694.13 DTW= 35.03 GWE= 659.10 MW-7STOC= 663.39 DTW= 9.55 GWE= 653.84 MW-7D TOC= 663.59 DTW= 9.42 GWE= 654.17 MW-8TOC= 661.16 DTW= 9.75 GWE= 651.41 MW-9A TOC= 692.60 DTW= 28.47 GWE= 664.13 MW-10TOC= 671.64 DTW= 24.21 GWE= 647.43 MW-11TOC= 692.10 DTW= 30.32 GWE= 661.78 MW-12 TOC= 711.66 DTW= 48.38 GWE= 663.28 SW-3-HG SW-1 SW-2 CDMW-5 TOC= 699.80 DTW= 26.43 GWE= 673.37 CDMW-6 TOC= 692.27 DTW= 16.67 GWE= 675.60 *CDMW-7 TOC= 701.11 DTW= 34.28 GWE= 666.83 LINED MSW LANDFILL (PERMIT 29-06) MW-2 CDMW-5 SW-2 MAINTENANCE BUILDING SCALES/SCALEHOUSE C&D LANDFILL (INACTIVE) 200' EXISTING RAILROAD RIGHT OF WAY (NC RAILROAD) LEACHATE STORAGE POND CLOSED PHASE 1 MSW LANDFILL PROPERTY LINE (TYP.) DUKE POWER TRANSMISSION LINE RIGHT OF WAY BORROW & STOCKPILE AREA ACTIVE MSW LANDFILL (PHASES 2 AREA 1) TOC DTW GWE G: \ C A D \ D a v i d s o n \ D a v d c o 1 6 - 7 \ s h e e t s \ D A V D C O - B 0 8 2 2 . d w g - 12 / 1 5 / 2 0 1 6 4 : 5 1 P M SM I T H 14 N . B o y l a n A v e n u e , R a l e i g h N C 2 7 6 0 3 NC L I C . N O . F - 1 3 7 0 ( E N G I N E E R I N G ) 91 9 . 8 2 8 . 0 5 7 7 GA R D N E R + DR A W N : AP P R O V E D : PR O J E C T N O : SC A L E : FI L E N A M E : DA T E : FIG U R E N O . PR E P A R E D B Y : PR E P A R E D F O R : © 2016 Smith Gardner, Inc. PO T E N T I O M E T R I C S U R F A C E M A P SE P T E M B E R 2 0 1 6 CL O S E D P H A S E 1 A N D C & D DA V I D S O N C O U N T Y , N C T. R . S . M. M . G . AS S H O W N 1 De c 2 0 1 6 DA V D C O 1 4 - 1 0 DA V D C O - B 0 8 2 2 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 September 2016 Groundwater Monitoring Report Davidson County Phase 1 Lined Landfill Solid Waste Permit No. 29-06 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 Da v i d s o n C o u n t y P h a s e 1 L i n e d L a n d f i l l Se p t e m b e r 2 0 - 2 1 , 2 0 1 6 By: BR Date: 11/28/2016 We l l 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 We l l De p t h (ft . b g s ) Gr o u n d Su r f a c e El e v a t i o n (ft . a m s l ) TO C El e v a t i o n (f t . a m s l ) De p t h to Wa t e r * (ft . ) Gr o u n d w a t e r El e v a t i o n ( f t . am s l ) Sc r e e n In t e r v a l (f t . b g s ) Screen Geology MW - 1 S 6 / 1 9 / 1 9 9 1 3 5 . 8 4 1 6 0 8 0 . 1 7 7 9 5 2 . 0 6 2 . 5 7 3 1 . 1 0 7 3 6 . 2 0 5 4 . 1 9 6 8 2 . 0 1 4 7 . 5 - 6 2 . 5 s c h i s t MW - 2 5 / 5 / 1 9 9 4 3 5 . 8 4 1 3 9 8 0 . 1 8 2 9 4 2 . 0 3 9 . 0 7 0 4 . 5 9 7 0 8 . 2 9 D R Y D R Y 2 4 - 3 9 d i o r i t e MW - 3 4 / 2 7 / 1 9 9 4 3 5 . 8 4 4 2 6 8 0 . 1 7 6 8 5 2 . 0 2 0 . 0 6 6 3 . 8 9 6 6 6 . 7 2 1 3 . 5 4 6 5 3 . 1 8 7 . 5 - 1 7 . 5 s a n d , s i l t a n d c l a y MW - 4 4 / 2 8 / 1 9 9 4 3 5 . 8 4 4 6 8 8 0 . 1 7 8 0 3 2 . 0 2 0 . 0 6 8 2 . 1 0 6 7 3 . 6 8 2 0 . 3 4 6 5 3 . 3 4 1 0 - 2 0 s a n d , s i l t a n d c l a y MW - 5 3 / 2 4 / 2 0 0 8 3 5 . 8 4 4 9 0 8 0 . 1 7 8 7 0 2 . 0 3 8 . 0 6 7 6 . 2 9 6 7 8 . 2 3 2 6 . 7 0 6 5 1 . 5 3 2 8 - 3 8 c l a y e y s i l t MW - 6 6 / 7 / 1 9 9 4 3 5 . 8 4 4 1 9 8 0 . 1 7 9 4 1 2 . 0 6 8 . 5 6 9 1 . 1 9 6 9 4 . 1 3 3 5 . 0 3 6 5 9 . 1 0 5 8 . 5 - 6 8 . 5 g r a n i t e g n e i s s MW - 7 S 4 / 2 5 / 1 9 9 4 3 5 . 8 4 4 0 9 8 0 . 1 8 0 5 6 2 . 0 1 5 . 0 6 6 1 . 3 5 6 6 3 . 3 9 9 . 5 5 6 5 3 . 8 4 5 - 1 5 c l a y a n d s i l t o r s a n d MW - 7 D 4 / 2 6 / 1 9 9 4 3 5 . 8 4 4 0 4 8 0 . 1 8 0 6 4 2 . 0 4 6 . 0 6 6 1 . 1 3 6 6 3 . 5 9 9 . 4 2 6 5 4 . 1 7 3 6 - 4 6 s a n d a n d c l a y MW - 8 4 / 2 7 / 1 9 9 4 3 5 . 8 4 4 3 8 8 0 . 1 8 2 2 6 2 . 0 1 5 . 0 6 6 1 . 3 1 6 6 1 . 1 6 9 . 7 5 6 5 1 . 4 1 5 - 1 5 s a n d , s i l t a n d c l a y MW - 9 A 1 1 / 1 1 / 2 0 1 0 3 5 . 8 4 3 8 1 8 0 . 1 8 2 9 0 2 . 0 3 3 . 0 6 9 1 . 3 4 6 9 2 . 6 0 2 8 . 4 7 6 6 4 . 1 3 2 3 - 3 3 s i l t a n d P W R MW - 1 0 9 / 8 / 1 9 9 9 3 5 . 8 4 3 5 6 8 0 . 1 8 3 8 3 2 . 0 2 7 . 5 6 6 7 . 0 0 6 7 1 . 6 4 2 4 . 2 1 6 4 7 . 4 3 1 7 . 5 - 2 7 . 5 d i o r i t e MW - 1 1 1 2 / 1 8 / 1 9 9 7 3 5 . 8 4 2 7 4 8 0 . 1 8 3 9 2 2 . 0 3 3 . 0 6 8 9 . 2 2 6 9 2 . 1 0 3 0 . 3 2 6 6 1 . 7 8 2 3 - 3 3 r o c k MW - 1 2 9 / 7 / 1 9 9 9 3 5 . 8 4 1 9 4 8 0 . 1 8 3 9 1 2 . 0 8 0 . 0 7 0 9 . 2 9 7 1 1 . 6 6 4 8 . 3 8 6 6 3 . 2 8 7 0 - 8 0 g r a n i t e p e g m a t i t e No t e s : S u r v e y D a t a c o l l e c t e d b y M i c h a e l G r e e n a n d A s s o c i a t e s . am s l = a b o v e m e a n s e a l e v e l bg s = b e l o w g r o u n d s u r f a c e We l l c o n s t r u c t i o n i n f o r m a t i o n f r o m w e l l l o g s ( p r o v i d e d i n A p p e n d i x A ) * D e p t h t o w a t e r m e a s u r e d f r o m T O C * M W - 1 i s t h e s a m e w e l l a s M W - 4 a s s o c i a t e d w i t h H o l l y G r o v e L a n d f i l l . 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 \ D a v i d s o n \ 2 3 . D a v i d s o n 9 - 1 6 \ 9 - 1 6 d a v g w s a m p l i n g t a b l e s . x l s x Ta b l e 2 Fi e l d P a r a m e t e r s Da v i d s o n C o u n t y P h a s e 1 L i n e d L a n d f i l l Se p t e m b e r 2 0 - 2 1 , 2 0 1 6 By: BR Date: 11/28/2016 pH C o n d u c t i v i t y T e m p e r a t u r e T u r b i d i t y (S t d . U n i t s ) ( u m h o s ) ( c e l s i u s ) ( N T U ) MW - 1 S 6 . 2 3 1 3 0 2 0 . 1 2 5 . 2 MW - 3 6 . 4 2 1 0 0 1 9 . 3 6 4 . 1 MW - 4 6 . 2 4 8 0 1 7 . 6 2 3 MW - 5 6 . 4 0 9 0 1 8 . 6 2 2 . 5 MW - 6 7 . 2 0 1 0 0 1 7 . 9 9 . 2 4 MW - 7 S 5 . 8 7 9 0 1 9 . 6 9 . 0 3 MW - 7 D 6 . 2 3 6 0 1 8 . 9 7 . 6 9 MW - 8 6 . 2 9 9 0 1 8 . 4 6 0 . 6 MW - 9 A 6 . 6 8 1 1 0 1 7 . 1 1 8 . 6 MW - 1 0 6 . 5 7 1 1 0 1 7 . 3 2 4 . 9 MW - 1 1 6 . 5 9 1 2 0 1 6 . 8 4 0 . 8 MW - 1 2 6 . 2 1 1 2 0 1 7 . 4 4 . 9 No t e s : Da t a C o l l e c t e d b y S + G p e r s o n e l * M W - 1 S i s t h e s a m e w e l l a s M W - 4 a s s o c i a t e d w i t h H o l l y G r o v e L a n d f i l l . SW - 1 a n d S W - 2 w e r e d r y a t t h e t i m e o f s a m p l i n g . We l l 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 \ D a v i d s o n \ 2 3 . D a v i d s o n 9 - 1 6 \ 9 - 1 6 d a v g w s a m p l i n g t a b l e s . x l s x Ta b l e 3 De t e c t e d C o n s t i t u e n t s Da v i d s o n C o u n t y P h a s e 1 L i n e d L a n d f i l l Se p t e m b e r 2 0 - 2 1 , 2 0 1 6 By: LMH Date:11/17/2015 Pa r a m e t e r M D L S W S L 2L o r GW P MC L M W - 1 S * M W - 3 M W - 4 M W - 5 M W - 6 M W - 7 D M W - 7 S M W - 8 M W - 9 A M W - 1 0 M W - 1 1 M W - 1 2 In o r g a n i c C o n s t i t u e n t s to t a l a l k a l i n i t y ( m g C A C O 3 / l ) 1 N E N E N E 23 3 N A N A N A N A N A N A N A N A N A N A N A ch l o r i d e ( m g / l ) 5 N E 2 5 0 2 5 0 * * 8 8 N A N A N A N A N A N A N A N A N A N A N A to t a l d i s s o l v e d r e s i d u e ( m g / l ) 1 N E 5 0 0 5 0 0 * * 55 3 NA N A N A N A N A N A N A N A N A N A N A su l f a t e 5 2 5 0 2 5 0 2 5 0 * * 2 2 . 4 J N A N A N A N A N A N A N A N A N A N A N A an t i m o n y 0 . 0 5 6 1 § 6 < 0 . 0 5 < 0 . 0 5 0 . 1 7 J < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 0 . 0 6 J < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 0 . 1 2 J ar s e n i c 0 . 6 6 10 1 0 1 0 < 0 . 6 6 < 0 . 6 6 < 0 . 6 6 < 0 . 6 6 < 0 . 6 6 < 0 . 6 6 1 . 8 J < 0 . 6 6 < 0 . 6 6 < 0 . 6 6 < 0 . 6 6 < 0 . 6 6 ba r i u m 0 . 0 2 10 0 7 0 0 2 0 0 0 4 4 . 7 J 1 9 8 4 1 . 2 J 5 2 . 9 J 1 3 . 0 J 5 . 2 J 22 1 62 . 9 J 1 0 . 1 J 9 . 5 J 3 5 . 1 J 0 . 9 3 J be r y l l i u m 0 . 0 4 1 4 § 4 < 0 . 0 4 0 . 2 0 J 0 . 0 6 J < 0 . 0 4 < 0 . 0 4 < 0 . 0 4 0 . 7 5 J 0 . 1 5 J < 0 . 0 4 0 . 1 5 J 0 . 4 6 J 0 . 0 6 J ca d m i u m 0 . 0 5 1 2 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 0 . 6 6 J < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 0 . 1 2 J < 0 . 0 5 co b a l t 0 . 0 4 10 1 § NE 0 . 1 4 J 5 . 9 J 0 . 8 6 J 0 . 2 8 J < 0 . 0 4 0 . 0 5 J 20 4. 1 J 0 . 4 6 J 1 . 5 J 2 . 8 J 0 . 1 9 J ch r o m i u m , t o t a l 0 . 0 6 10 1 0 1 0 0 < 0 . 0 6 1 . 6 J 0 . 9 6 J 0 . 2 0 J < 0 . 0 6 < 0 . 0 6 15 6. 7 J 3 . 5 J 3 . 5 J 1 7 < 0 . 0 6 co p p e r 0 . 0 7 10 1 0 0 0 1 3 0 0 < 0 . 0 7 J 3 2 3 . 7 J 0 . 4 0 J < 0 . 0 7 < 0 . 0 7 8 7 1 1 2 . 8 J 3 . 5 J 2 3 0 . 4 7 J ir o n 5 . 2 3 30 0 3 0 0 3 0 0 1 1 0 J N A N A N A N A N A N A N A N A N A N A N A le a d 0 . 0 6 10 1 5 15 < 0 . 0 6 1 . 4 J 0 . 7 3 J 0 . 2 4 J < 0 . 0 6 0 . 1 7 J 1 1 6 . 9 J 0 . 3 3 J 0 . 7 3 J 3 . 2 J 0 . 0 8 J ma n g an e s e 0 . 0 6 50 5 0 50 6. 1 J N A N A N A N A N A N A N A N A N A N A N A me r c u r y 0. 0 4 01 2 0. 0 6 J N A N A N A N A N A N A N A N A N A N A N A ni c k e l 0 . 0 6 50 1 0 0 NE 1. 4 J 4 . 9 J 0 . 5 1 J < 0 . 0 6 < 0 . 0 6 < 0 . 0 6 9 . 2 J 4 . 8 J 1 . 7 J 2 . 4 J 9 . 7 J 1 . 5 J se l e n i u m 0 . 5 4 10 2 0 50 2. 3 J 0 . 7 2 J < 0 . 5 4 < 0 . 5 4 < 0 . 5 4 < 0 . 5 4 1 . 2 J < 0 . 5 4 0 . 5 8 J < 0 . 5 4 0 . 6 1 J < 0 . 5 4 si l v e r 0 . 0 6 10 2 0 1 0 0 < 0 . 0 6 < 0 . 0 6 < 0 . 0 6 < 0 . 0 6 < 0 . 0 6 < 0 . 0 6 0 . 2 J < 0 . 0 6 < 0 . 0 6 < 0 . 0 6 0 . 0 9 J < 0 . 0 6 th a l l i u m 0 . 0 5 6 0. 2 8 § 2 0 . 0 6 J 0 . 1 0 J < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 < 0 . 0 5 0 . 1 J < 0 . 0 5 < 0 . 0 5 0 . 0 8 J 0 . 0 5 J 0 . 0 6 J va n a d i u m 0 . 3 6 25 0. 3 § NE 1 . 7 J 40 5. 0 J 4 . 1 J < 0 3 6 0 . 5 1 J 6 8 2 0 . 5 J 6 . 7 J 1 0 . 8 J 45 4.7 J zi n c 1 . 6 1 10 1 0 0 0 5 0 0 0 2 . 3 J 4 7 7 . 4 J 5 . 7 J < 1 . 6 1 < 1 . 6 1 1 2 4 1 6 4 . 6 J 4 . 7 J 2 0 1 . 7 J Or g a n i c C o n s t i t u e n t s to l u e n e 0. 2 3 1 6 0 0 1 0 0 0 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 7 . 2 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 < 0 . 2 3 ac e t o n e 9. 0 6 1 0 0 6 0 0 0 N E 1 3 . 9 0 J 1 0 . 4 0 J 4 1 1 < 9 . 0 6 < 9 . 0 6 < 9 . 0 6 1 2 5 < 9 . 0 6 < 9 . 0 6 < 9 . 0 6 < 9 . 0 6 < 9 . 0 6 NO T E : M D 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 - SW S G r 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 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 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 <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 NA - Sa m p l e 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 Bo l d - Ab o v e 2 L o r G W P S t a n d a r d * M W - 1 S i s t h e s a m e w e l l a s M W - 4 a s s o c i a t e d w i t h H o l l y G r o v e L a n d f i l l . 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 , 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 d a t e d 1 0 / 3 1 / 2 0 1 6 , C l i e n t I D # 6 0 3 8 B . H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Davidson\23. Davidson 9-16\9-16 dav gw sampling tables.xls 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 . Table 4 Leachate Analytical Data Davidson County Phase 1 Lined Landfill September 20-21, 2016 By: BR Date: 11/28/2016 Parameter Unit Leachate BOD mg/l 7.4 COD mg/l 227 Nitrate Nitrogen as N mg/l 0.05 J Total Phosphorus as P mg/l 0.11 Antimony ug/l 1.2 J Arsenic ug/l 1.6 J Barium ug/l 53.7 J Cobalt ug/l 1.1 J Total Chromium ug/l 1.1 J Copper ug/l 2.4 J Lead ug/l 0.10 J Nickel ug/l 13 J Selenium ug/l 2.4 J Vanadium ug/l 3.6 J Zinc ug/l 2.6 J NOTES: Lab data analysis by Environment 1, Inc. report dated 10/31/2016, Client ID#6038A. p laboratory MDL and the SWSL. These are estimated concentrations. H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Davidson\23. Davidson 9-16\9-16 dav gw sampling tables.xlsx Table 5 Aquifer Conductivity and Velocity Calculations Davidson County Phase 1 Lined Landfill September 21-25, 2015 By: BR Date: 12/15/2016 Well Number Aquifer Conductivity (ft/day) Conductivity (ft/min) Assumed Porosity (n)Gradient (I)Velocity (ft/day) MW-1S Bedrock 0.14 9.72E-05 0.1 0.046 0.0644 MW-2 Bedrock 0.17 1.18E-04 0.1 NM NM MW-3 Unconsolidated 0.62 4.31E-04 0.2 0.060 0.1860 MW-4 Unconsolidated 1.31 9.10E-04 0.2 0.055 0.3603 MW-6 Bedrock 0.02 1.39E-05 0.1 0.045 0.0090 MW-7S Unconsolidated 0.38 2.64E-04 0.15 0.038 0.0963 MW-8 Unconsolidated 0.57 3.96E-04 0.15 0.028 0.1064 MW-9A Unconsolidated 2.65 1.84E-03 0.1 0.017 0.4505 MW-10 Unconsolidated 0.88 6.11E-04 0.2 0.102 0.4488 MW-11 Unconsolidated 4.13 2.87E-03 0.2 0.059 1.2184 MW-12 Unconsolidated 0.58 4.03E-04 0.2 0.022 0.0638 Average 0.3004 Notes: Velocity Calculated from V=K*I/n where: V = velocity K = Hydraulic Conductivity I = Gradient n = Porosity Hydraulic Conductivity data from slug tests performed in 1994 Porosity values assumed from Groundwater & Wells (Driscoll) Survey Data collected by Michael Green and Associates. Gradient calculated from October 2016 potentiometric surface. NM - Not Measured H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Davidson\23. Davidson 9-16\9-16 dav gw sampling tables.xlsx Appendix A Monitoring Well Information September 2016 – Groundwater Monitoring Report Davidson County Phase 1 Lined Landfill Solid Waste Permit No. 29-06 This page intentionally left blank. FIELD BOREHOLE LOG BOREHOLE NUMBER PROJECT NAME: LOCATION: DRILLING CO: DRILLING METHOD: FIELD PARTY: GEOLOGIST: DATE BEGUN: COMPLETED: TOTAL DEPTH: TOP OF CASING ELEV.: Depth (ft) Time Date STATIC WATER LEVEL (BLS) DE P T H BL O W C O U N T SA M P L I N G M E T H O D RE C O V E R Y DR I L L M E T H O D DESCRIPTION LI T H O L O G Y WE L L IN S T A L L A T I O N 0.0 5.0 10.0 15.0 20.0 25.0 30.0 0.0 5.0 10.0 15.0 20.0 25.0 30.0 DE P T H Richardson Smith Gardner & Assoc 14 North Boylan Avenue, Raleigh NC 27603 (919) 828-0577 Page 1 of 1 GROUND ELEV.: NORTHING:EASTING:764126.597 1649351.338 Pe r 6 " Fe e t In c h e s Fe e t MW-9a AH Davidson Co Phase 1 Landfill Davidson County Geologic Explorations Johnny Burr Lindsay Quant 11/11/10 11/11/10 33 Grab Grab Grab Grab Grab Grab AH SILT: Dry tan silt. SILTY CLAY: Dry tan silty clay. SANDY SILT: Dry tan sandy silt. SILT: Dry to moist gray silt. PWR: Moist to wet gray silty partially weathered granitic rock. Boring terminated at 33 feet. 686.32 Appendix B Laboratory Analytical Report September 2016 Groundwater Monitoring Report Davidson County Phase 1 Lined Landfill NC Solid Waste Permit No. 29-06 This page intentionally left blank. Appendix C Time vs. Concentration Graphs September 2016 Groundwater Monitoring Report Davidson County Phase 1 Lined Landfill NC Solid Waste Permit No. 29-06 This page intentionally left blank. Pa g e 1 Ba r i u m , t o t a l Ti m e - S e r i e s G r a p h o f M W - 7 S 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 10 0 20 0 30 0 40 0 50 0 60 0 70 0 5 / 2 7 / 1 9 9 4 8 / 3 / 1 9 9 7 1 0 / 1 1 / 2 0 0 0 1 2 / 1 9 / 2 0 0 3 2 / 2 6 / 2 0 0 7 5 / 5 / 2 0 1 0 7/13/2013 9/20/2016 Pa g e 1 Ch r o m i u m , t o t a l Ti m e - S e r i e s G r a p h o f M W - 7 S 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 ) 050 10 0 15 0 20 0 25 0 30 0 5 / 2 7 / 1 9 9 4 8 / 3 / 1 9 9 7 1 0 / 1 1 / 2 0 0 0 1 2 / 1 9 / 2 0 0 3 2 / 2 6 / 2 0 0 7 5 / 5 / 2 0 1 0 7/13/2013 9/20/2016 Pa g e 1 Co b a l t , t o t a l Ti m e - S e r i e s G r a p h o f M W - 7 S 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 ) 050 10 0 15 0 20 0 5 / 2 7 / 1 9 9 4 8 / 3 / 1 9 9 7 1 0 / 1 1 / 2 0 0 0 1 2 / 1 9 / 2 0 0 3 2 / 2 6 / 2 0 0 7 5 / 5 / 2 0 1 0 7/13/2013 9/20/2016 Pa g e 1 Va n a d i u m 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 ) 050 10 0 15 0 20 0 25 0 30 0 MW - 3 MW - 1 1 5 / 2 7 / 1 9 9 4 8 / 3 / 1 9 9 7 1 0 / 1 1 / 2 0 0 0 1 2 / 1 9 / 2 0 0 3 2 / 2 6 / 2 0 0 7 5 / 5 / 2 0 1 0 7/13/2013 9/20/2016