2906_DavidsonCounty_MSWLF_Phase1_GWMR_20180110

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September 2017 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

January 2018

Prepared by:

© 2018 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.

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September 2017 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
Thomasville, North Carolina 27360-0024

S+G Project No. DAVDCO 17-7

Madeline German, P.G.
Project Geologist

Joan A. Smyth, P.G.
Senior Hydrogeologist

January 2018

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1/10/2018
1/10/2018

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Davidson County Phase 1 Lined Landfill September 2017 Groundwater Monitoring Report
January 2018 Table of Contents Page i
Davidson County Phase 1 Lined Landfill
NC Solid Waste Permit No. 29-06

September 2017 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 Site Map
Figure 2 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

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Davidson County Phase 1 Lined Landfill September 2018 Groundwater Monitoring Report
January 2018 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 18-21, 2017. 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. MW-2 was dry and not sampled
this event. SW-1 is the upstream surface water location; SW-2 is located on Jimmy’s Creek
downstream of the landfill. 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.
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Davidson County Phase 1 Lined Landfill September 2018 Groundwater Monitoring Report
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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”, defined by the laboratory as between the MDL and the SWSL. The laboratory
results are presented in Appendix B.
5.2.1 Inorganic Constituents
Two inorganic constituents were reported at concentrations above their 2L
Standard in collected samples this event.

Chromium (MW-11)
Iron (MW-1S)
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Two inorganic constituents were reported at concentrations above their GWP
Standard in collected samples this event:

Cobalt (MW-3, MW-4, MW-7S, MW-8, MW-10 and MW-11)
Vanadium (MW-1S, MW-3, MW-4, MW-5, MW-6, MW-7S, MW-7D, MW-8, MW-9A,
MW-10, MW-11 and MW-12)

Monitoring well MW-1S is the upgradient, background well for the site.
Detections in this well indicate natural concentrations of constituents detected in
that well. Inorganic detections are shown in Table 3. Time vs. concentration
graphs for constituents reported at concentrations over their respective standard
are presented in Appendix C.
5.2.2 Organic Constituents
No organic constituents were detected in samples collected this event.
5.2.3 Surface Water Results
No inorganic or organic constituents were detected above the 2B Standard in
samples collected this event. Surface water results are presented in Table 3.
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.
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 0.0097 feet/day (MW-6) to 2.321
feet/day (MW-11) and averaged 0.4690 feet/day. Calculations are included in Table 5.
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Davidson County Phase 1 Lined Landfill September 2018 Groundwater Monitoring Report
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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 2.
8.0 CONCLUSIONS
The analytical results for the Phase 1 lined landfill indicated that chromium, cobalt, iron and
vanadium were detected at concentrations above their respective standards. These 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 2018. An analytical
results summary will be submitted to DEQ for this event.

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FIGURES

September 2017 Groundwater Monitoring Report
Davidson County Phased 1 Lined Landfill
NC Solid Waste Permit No. 29-06

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LINED MSW LANDFILL
(PERMIT 29-06)
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)G:\CAD\Davidson\Davdco 17-7\sheets\DAVDCO-B0853.dwg - 12/1/2017 3:42 PMSMITH14 N. Boylan Avenue, Raleigh NC 27603NC LIC. NO. F-1370 (ENGINEERING)919.828.0577GARDNER+DRAWN:APPROVED:PROJECT NO:SCALE:FILENAME:DATE:FIGURE NO.PREPARED BY:PREPARED FOR:© 2017 Smith Gardner, Inc.SITE MAPSEPTEMBER 2017CLOSED PHASE 1 AND C&DDAVIDSON COUNTY, NCJ.A.L.M.M.G.AS SHOWN1Dec 2017DAVDCO 17-7DAVDCO-B0853DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
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MW-1S
TOC= 736.20
DTW= 55.65
GWE= 680.55
MW-1D
CDMW-2
CDMW-3
TOC= 685.00
DTW= 14.71
GWE= 670.29
*MW-2TOC= 708.29
DTW= DRY
MW-3
TOC= 666.72
DTW= 13.43
GWE= 653.29
MW-4
TOC= 673.68
DTW= 20.07
GWE= 653.61
MW-5
TOC= 678.23
DTW= 26.35
GWE= 651.88
MW-6
TOC= 694.13
DTW= 35.25
GWE= 658.88
MW-7S
TOC= 663.39
DTW= 9.62
GWE= 653.77
MW-7D
TOC= 663.59
DTW= 9.58
GWE= 654.01
MW-8
TOC= 661.16
DTW= 9.32
GWE= 651.84
MW-9A
TOC= 692.60
DTW= 29.55
GWE= 663.05
MW-10
TOC= 671.64
DTW= 25.20
GWE= 646.44
MW-11
TOC= 692.10
DTW= 29.23
GWE= 662.87
MW-12
TOC= 711.66
DTW= 50.02
GWE= 661.64
SW-3-HG
SW-1
SW-2
CDMW-5
TOC= 699.80
DTW= 26.44
GWE= 673.36
CDMW-6
TOC= 692.27
DTW= 16.11
GWE= 676.16
CDMW-7
TOC= 701.11
DTW= 34.50
GWE= 666.61
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:\CAD\Davidson\Davdco 17-7\sheets\DAVDCO-B0853.dwg - 12/1/2017 3:07 PMSMITH14 N. Boylan Avenue, Raleigh NC 27603NC LIC. NO. F-1370 (ENGINEERING)919.828.0577GARDNER+DRAWN:APPROVED:PROJECT NO:SCALE:FILENAME:DATE:FIGURE NO.PREPARED BY:PREPARED FOR:© 2017 Smith Gardner, Inc.POTENTIOMETRIC SURFACE MAPSEPTEMBER 2017CLOSED PHASE 1 AND C&DDAVIDSON COUNTY, NCJ.A.L.M.M.G.AS SHOWN2Dec 2017DAVDCO 17-7DAVDCO-B0853DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
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TABLES

September 2017 Groundwater Monitoring Report
Davidson County Phase 1 Lined Landfill
Solid Waste Permit No. 29-06

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Table 1Groundwater ElevationsDavidson County Phase 1 Lined LandfillSeptember 18-21, 2017By: MGDate: 12/5/2017WellWell Installation DateLatitude LongitudeWell Diameter (inches)Total Well Depth (ft. bgs)Ground Surface Elevation (ft. amsl)TOC Elevation (ft. amsl)Depth to Water* (ft.)Groundwater Elevation (ft. amsl)Screen Interval (ft. bgs)Screen GeologyMW-1S 6/19/1991 35.84160 80.17795 2.0 62.6 731.10 736.20 55.65 680.55 47.5-62.5 schistMW-2 5/5/1994 35.84139 80.18294 2.0 41.5 704.59 708.29 DRY DRY 24-39 dioriteMW-3 4/27/1994 35.84426 80.17685 2.0 19.5 663.89 666.72 13.43 653.29 7.5-17.5 sand, silt and clayMW-4 4/28/1994 35.84468 80.17803 2.0 23.3 682.10 673.68 20.07 653.61 10-20 sand, silt and clayMW-5 3/24/2008 35.84490 80.17870 2.0 45.9 676.29 678.23 26.35 651.88 28-38 clayey siltMW-6 6/7/1994 35.84419 80.17941 2.0 70.4 691.19 694.13 35.25 658.88 58.5-68.5 granite gneissMW-7S 4/25/1994 35.84409 80.18056 2.0 18.0 661.35 663.39 9.62 653.77 5-15 clay and silt or sandMW-7D 4/26/1994 35.84404 80.18064 2.0 45.3 661.13 663.59 9.58 654.01 36-46 sand and clayMW-8 4/27/1994 35.84438 80.18226 2.0 16.2 661.31 661.16 9.32 651.84 5-15 sand, silt and clayMW-9A 11/11/2010 35.84381 80.18290 2.0 36.5 691.34 692.60 29.55 663.05 23-33 silt and PWRMW-10 9/8/1999 35.84356 80.18383 2.0 30.3 667.00 671.64 25.20 646.44 17.5-27.5 dioriteMW-11 12/18/1997 35.84274 80.18392 2.0 36.2 689.22 692.10 29.23 662.87 23-33 rockMW-12 9/7/1999 35.84194 80.18391 2.0 79.8 709.29 711.66 50.02 661.64 70-80 granite pegmatiteNotes: Survey Data collected by Michael Green and Associates.amsl = above mean sea levelbgs = below ground surfaceWell construction information from well logs (provided in Appendix A)* Depth to water measured from TOC* MW-1S is the same well as MW-4 associated with Holly Grove Landfill.H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Davidson\25. Davidson 9-17\Sep-17 dav gw sampling tables.xlsxDocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
Table 2Field ParametersDavidson County Phase 1 Lined LandfillSeptember 18-21, 2017By: WWDate:11/12/2017pH Conductivity Temperature Turbidity(Std. Units) (umhos) (celsius) (NTU)MW-1S 6.12 846 22.8 15.2MW-3 6.05 250 17.98 61.2MW-4 5.72 140 18.01 66.2MW-5 6.25 162 18.72 6.55MW-6 6.98 241 19.85 2.88MW-7S 5.85 211 18.89 384MW-7D 7.01 241 19.85 2.88MW-8 6.02 256 18.82 297MW-9A 6.26 461 21.29 36.4MW-10 6.27 352 16.1 11.6MW-11 6.33 243 17.2 26.4MW-12 6.75 774 17.8 5.4Notes:Data Collected by S+G personel* MW-1S is the same well as MW-4 associated with Holly Grove Landfill.WellH:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Davidson\25. Davidson 9-17\Sep-17 dav gw sampling tables.xlsxDocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
Table 3Detected ConstituentsDavidson County Phase 1 Lined LandfillSeptember 18-21, 2017By: JMDate:5/29/2017Parameter MDL SWSL2L or GWPMCL 2B MW-1S* MW-3 MW-4 MW-5 MW-6 MW-7D MW-7S MW-8 MW-9A MW-10 MW-11 MW-12 SW-1 SW-2Inorganic Constituentstotal alkalinity (mg CACO3/l) 1 NE NE NE NE254 NA NA NA NA NA NA NA NA NA NA NA NA NAchloride (mg/l) 5 NE 250 250**23093 NA NA NA NA NA NA NA NA NA NA NA NA NAtotal dissolved residue (mg/l) 1 NE 500 500**500534NA NA NA NA NA NA NA NA NA NA NA NA NAsulfate 1.04 250 250 250**25028.6 J NA NA NA NA NA NA NA NA NA NA NA NA NAarsenic 0.0710 10 10 10 0.22 J0.29 J 0.22 J 0.11 J <0.070.08 J 0.59 J 0.45 J 0.25 J 0.18 J 0.85 J 0.11 J 0.42 J 1.2 Jbarium 0.07100 700 2000 2000000 42.7 J 90.5 J 63.1 J 40.1 J 21 J 7.1 J 31.1 J 55.7 J 11.5 J 17.4 J 42.1 J 1.3 J 34.4 J 52.2 Jberyllium 0.0714 §4 6.5 <0.07 0.11 J 0.09 J <0.07 <0.07 <0.07 0.15 J 0.18 J <0.07 0.28 J 0.64 J <0.07 <0.07 <0.07cadmium 0.081 2 5 2 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 0.15 J <0.08 <0.08 <0.08cobalt 0.24101 §NE 270 0.32 J2.1 J 2.4 J<0.24 0.46 J <0.244.6 J 3.4 J0.38 J2 J 4 J0.24 J 0.74 J 2.5 Jchromium, total 0.0810 10 100 50 <0.08 0.12 J 3 J <0.08 <0.08 <0.08 2.3 J 4.7 J 2.5 J 5 J19<0.08 <0.08 <0.08copper 0.0910 1000 1300 7 1.1 J 8.5 J 10 1.1 J 1.9 J 1.2 J 8.3 J 7.4 J 3.2 J 5.4 J 39 1.7 J 0.58 J 1.4 Jiron 13.27300 300 300 1000310NA NA NA NA NA NA NA NA NA NA NA NA NAlead 0.0810 151525 0.14 J 0.49 J 2 J 0.11 J 0.86 J 0.22 J 1.6 J 13 0.32 J 1.6 J 5.5 J <0.08 <0.08 0.42 Jmanganese 1.2850 5050200 34 J NA NA NA NA NA NA NA NA NA NA NA NA NAnickel 0.0850 100NE88 1.5 J 2.1 J 2.2 J 0.52 J 0.67 J 0.18 J 2.9 J 3.5 J 1.6 J 3.2 J 11.2 J 1.5 J 0.52 J 0.91 Jselenium 0.5110 20505 1 J <0.51 <0.51 <0.51 <0.51 <0.51 <0.51 0.82 J <0.51 <0.51 <0.51 <0.51 <0.51 <0.51vanadium 0.24250.3 §NE NE2.6 J 12.1 J 10.4 J 4 J 1.8 J 1.3 J 9.5 J 15.4 J 6.2 J 17.8 J 67 4.9 J0.79 J 3.1 Jzinc 0.6610 1000 5000 50 <0.66 14 20 <0.66 3.2 J 2.7 J 9.3 J 9.7 J 1.4 J 6.6 J 28 16 <0.66 2.6 JNOTE: MDL -Method Detection LimitSWSL -Solid Waste Section Quantitation Limits2L-Groundwater Standards (15A NCAC 2L 0200)GWP-SWS Groundwater Protection Standards (noted by §)MCL - Federal Maximum Contaminant Limit** - National Secondary Drinking Water Standard2B-NCAC 2B Standard for Class C watersJ-Laboratory defined detection between MDL and SWSL<MDL -Not detected at or above MDLNA -Parameter Not AnalyzedNE - Standard Not EstablishedBold -Above 2L or GWP Standard* MW-1S is the same well as MW-4 associated with Holly Grove Landfill.Table units are presented in ug/l, unless otherwise notedLab data analysis by Environment 1, Inc. report dated 4/20/2017, Client ID#6038.H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Davidson\25. Davidson 9-17\Sep-17 dav gw sampling tables.xlsxDocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
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Table 4
Leachate Analytical Data
Davidson County Phase 1 Lined Landfill
September 18-21, 2017
By: MG
Date: 1/4/2018
Parameter Unit Leachate
BOD mg/l 6.4
COD mg/l 142
Total Phosphorus as P mg/l 0.26
Antimony ug/l 0.59 J
Arsenic ug/l 1.5 J
Barium ug/l 59.2 J
Cobalt ug/l 1 J
Total Chromium ug/l 1.5 J
Copper ug/l 3.7 J
Lead ug/l 0.37 J
Nickel ug/l 8.9 J
Selenium ug/l 1.1 J
Vanadium ug/l 8.8 J
Zinc ug/l 2.9 J
NOTES:
Lab data analysis by Environment 1, Inc. report dated 11/1/2017, Client ID#6038A.
J-values indicate the parameter was detected between the
laboratory MDL and the SWSL.
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Table 5
Aquifer Conductivity and Velocity Calculations
Davidson County Phase 1 Lined Landfill
September 18-21, 2017
By: MG
Date: 1/4/2018
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 0.011 0.0154
MW-2 Bedrock 0.17 1.18E-04 0.1 NM NM
MW-3 Unconsolidated 0.62 4.31E-04 0.2 0.029 0.0884
MW-4 Unconsolidated 1.31 9.10E-04 0.2 0.090 0.5911
MW-6 Bedrock 0.02 1.39E-05 0.1 0.049 0.0097
MW-7S Unconsolidated 0.38 2.64E-04 0.15 0.042 0.1061
MW-8 Unconsolidated 0.57 3.96E-04 0.15 0.053 0.2001
MW-9A Unconsolidated 2.65 1.84E-03 0.1 0.026 0.6977
MW-10 Unconsolidated 0.88 6.11E-04 0.2 0.122 0.5381
MW-11 Unconsolidated 4.13 2.87E-03 0.2 0.112 2.3216
MW-12 Unconsolidated 0.58 4.03E-04 0.2 0.042 0.1218
Average 0.4690
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 March 2017 potentiometric surface.
NM - Not Measured
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Appendix A
Monitoring Well Information
September 2017 – Groundwater Monitoring Report
Davidson County Phase 1 Lined Landfill
Solid Waste Permit No. 29-06

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DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
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)DEPTHBLOW COUNTSAMPLING METHODRECOVERYDRILL METHODDESCRIPTION LITHOLOGYWELLINSTALLATION0.0
5.0
10.0
15.0
20.0
25.0
30.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0DEPTHRichardson Smith Gardner & Assoc
14 North Boylan Avenue, Raleigh NC 27603
[phone] Page 1 of 1
GROUND ELEV.:
NORTHING:EASTING:764126.597 1649351.338
Per 6"FeetInchesFeetMW-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
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DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32

Appendix B
Laboratory Analytical Report
September 2017 Groundwater Monitoring Report
Davidson County Phase 1 Lined Landfill
NC Solid Waste Permit No. 29-06

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DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32

Appendix C
Time vs. Concentration Graphs
September 2017 Groundwater Monitoring Report
Davidson County Phase 1 Lined Landfill
NC Solid Waste Permit No. 29-06

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DocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
0.0020.0040.0060.0080.00100.00120.00140.00160.00180.00Concentration (ug/l)DateChromiumMW‐11NC2LDocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
0.0010.0020.0030.0040.0050.0060.0070.0080.00Concentration (ug/l)DateCobaltMW‐10MW‐11MW‐3MW‐4MW‐7SMW‐8NC2LDocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
0.00200.00400.00600.00800.001,000.001,200.001,400.001,600.001,800.00Concentration (ug/l)DateIronMW‐1SNC2LDocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32
0.0050.00100.00150.00200.00250.00300.00350.00400.00Concentration (ug/l)DateVanadiumMW‐10MW‐12MW‐1SMW‐3MW‐4MW‐5MW‐6MW‐7SMW‐8MW‐9ANC2LDocuSign Envelope ID: F8C520EE-54D6-4442-898D-3AB33B3A8D32