2902_DavidsonHollyGrove_MSWLF_GWMR_20180110

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September 2017 Semi-Annual Groundwater Monitoring Report

Davidson County Closed Holly Grove Landfill
NC Solid Waste Permit No. 29-02

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 Closed Holly Grove Landfill
NC Solid Waste Permit No. 29-02

Prepared For:
Davidson County Integrated Solid Waste
Thomasville, North Carolina 27360-0024

S+G Project No. DAVDCO 17-6

Madeline German P.G.
Project Geologist

Joan Smyth, P.G.
Senior Hydrogeologist

January 2018

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1/10/2018
1/10/2018

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Davidson County Holly Grove Landfill September 2017 Groundwater Monitoring Report
January 2018 Table of Contents Page i
Davidson County Holly Grove Landfill
NC Solid Waste Permit No. 29-02

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 ......................................................................................... 2 
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 
6.0 GROUNDWATER CHARACTERIZATION ...................................................................... 3 
7.0 CONCLUSIONS .......................................................................................................... 4 

FIGURE
Figure 1 Site Map
Figure 2 Potentiometric Surface Map

TABLES
Table 1 Groundwater Elevations
Table 2 Field Parameters
Table 3 Detected Inorganic Parameters
Table 4 Detected Organic Parameters
Table 5 Groundwater Velocity Calculations

APPENDICES
Appendix A Well Logs
Appendix B Laboratory Analytical Report

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Davidson County Holly Grove Landfill September 2017 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 Closed Holly Grove Landfill, permit number 29-
02, as required by 15A NCAC 13B .0500. 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.

Three landfills are currently monitored under permit 29-02, as the Holly Grove Landfill, due to
their waste margins close proximity to one another. Areas 1 and 2, located in the Holly Grove
Landfill, were unlined municipal solid waste facilities owned and operated by Davidson County
Integrated Solid Waste. The third area, the Scarlett Landfill located west of Areas 1 and 2, is a
private landfill originally owned and operated by Mr. Scarlett, then owned by Ms. Virginia White
who sold the Scarlett property to Hale Artificier Inc. in 2001; it is currently used to house
storage containers.
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 Holly Grove groundwater monitoring network includes sixteen monitoring wells (MW-1A,
MW-2, MW-3A, MW-4, MW-5, MW-6, MW-8, MW-9, MW-10, MW-11, MW-12, MW-13, MW-14,
MW-15, MW-16 and MW-17) and three surface water locations (SW-1, SW-2 and SW-3). SW-3
was not sampled this event because it was dry. A trip blank (TB) was also submitted for quality
control purposes. Available well records are provided in Appendix A.

The background well for the Holly Grove site (MW_4) is also the background well for the Phase 1
Lined Davidson County Landfill (Permit 29-06) (MW-1s). Since that well is located in the Phase
1 area, it was sampled and laboratory analysis is included with the Phase 1 wells (Environment
1 Report 11/1/17, Client ID# 6038). The background well was recorded in the Phase 1 report as
MW-1S and that data is included in the Phase 1 Lined Davidson County Landfill’s respective
groundwater monitoring report.

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Davidson County Holly Grove Landfill September 2017 Groundwater Monitoring Report
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A map illustrating the sampling locations is provided as Figure 1.
4.0 SAMPLING PROCEDURES
Sampling procedures followed the protocols set forth in 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.

Environment 1, Inc. (NC Laboratory Certification #10) provided laboratory prepared sample
containers. 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 have remained consistent with previously reported sampling
events.
5.2 Laboratory Analysis
Samples were transported to Environment 1, Inc., in Greenville, NC for analysis.
Laboratory analysis included metals via EPA Test Method 200.8 and Appendix I Volatile
Organic Compounds (VOCs) via EPA Test Method 8260B. Analytical results were
compared to the NC DWM Solid Waste Section Quantitation Limits (SWSLs), 15A NCAC
2L.0200 (2LStandard), Groundwater Protection (GWP) Standards and Federal Maximum
Contaminant Limits (MCL). Surface water results were compared with the NCAC 2B
Standard for Class C waters (2B Standard).

Most inorganic constituents were either below the method detection limit (MDL) or were
“J-values”, reported by the laboratory as between the MDL and the SWSL. The
laboratory results are presented in Appendix B.
5.2.1 Inorganic Constituents
Chromium (MW-15) was the only inorganic constituent reported at its 2L
Standard in samples collected this event.
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Davidson County Holly Grove Landfill September 2017 Groundwater Monitoring Report
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Two inorganic constituents were detected at concentrations above their GWP
Standards in samples collected this event.

 Cobalt (MW-1A, MW-2, MW-5, MW-9, MW-10, MW-11, MW-13, MW-15 and
MW-17)
 Vanadium (all sampled well locations for this event)

The presence of vanadium at concentrations exceeding the GWP indicates this
constituent is naturally occurring. Inorganic detections are provided on Table 3.
5.2.2 Organic Constituents
The following six organic constituents were reported at concentrations above
their 2L Standards:

 1,1-Dichloroethane (MW-3A, MW-6, MW-8, MW-12 and MW-17);
 1,2-Dichloroethane (MW-1A and MW-121);
 1,2-Dichloropropane (MW-1A and MW-61);
 1,4-Dichlorobenzene (MW-9 and MW-13);
 Benzene (MW-1A, MW-9 and MW-13);
 Vinyl Chloride (MW-1A, MW-3A and MW-12).

Organic detections are provided on Table 4.
5.2.3 Surface Water Results
No inorganic or organic constituents were detected in surface water samples
above their 2B Standards.
6.0 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 at the Holly Grove Landfill ranged from 0.028
feet/day (MW-3A) to 1.71 feet/day (MW-13) and averaging 0.851 feet/day. Calculations are
included in Table 5. Flow direction is generally southwest across the site; which is consistent

1 Detected at the 2L Standard in the sample collected for this event.
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Davidson County Holly Grove Landfill September 2017 Groundwater Monitoring Report
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with historically reported groundwater flow patterns. The potentiometric surface map for this
monitoring event is included as Figure 1.
7.0 CONCLUSIONS
Overall reported detections remain consistent with historically reported results. Monitoring
event results indicate detections of both inorganic and organic constituents above the 2L
Standards. The inorganic detections are likely due to natural occurrence in the soils in this area
of North Carolina and turbidity; and are not due to landfill impact. Organic constituent
detections are consistent with historical results. Surface water samples indicated no 2B
exceedances for this event indicating surface waters remain un-impacted.

The next groundwater monitoring event is tentatively scheduled for March 2018. Sampling
results will be reported to NCDEQ with laboratory analysis.

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FIGURES

September 2017 Groundwater Monitoring Report
Davidson County Holly Grove Landfill
NC Solid Waste Permit No. 29-02
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HOLLY GROVE
LANDFILLS PROPERTY
LINE
G:\CAD\Davidson\Davdco 17-6\sheets\DAVDCO-B0854.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 HOLLY GROVE LANDFILLDAVIDSON COUNTY, NCJ.A.L.M.M.G.AS SHOWN1Dec 2017DAVDCO 17-6DAVDCO-B0854MW-4 LOCATED APPROX.
2,000 FT. N
N35°50'40.85"
W80°10'40.92"
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MW-5
TOC= 664.29
DTW= 11.93
GWE= 652.36
MW-11
TOC= 680.07
DTW= 26.62
GWE= 653.45
MW-13
TOC= 671.31
DTW= 14.53
GWE= 656.78
MW-12TOC= 671.48
DTW= 16.95
GWE= 654.53
MW-2
TOC= 665.81
DTW= 5.48
GWE= 660.33
MW-3A
TOC= 662.49
DTW= 8.02
GWE= 654.47
MW-14
TOC= 666.04
DTW= 13.60
GWE= 652.44
MW-5
TOC= 664.29
DTW= 11.93
GWE= 652.36
MW-15
TOC= 697.33
DTW= 17.96
GWE= 679.37
MW-17
TOC= 737.99
DTW= 14.29
GWE= 723.70
MW-1A
TOC= 781.39
DTW= 31.78
GWE= 749.61
MW-6*
TOC= 781.25
DTW= 63.61
GWE= 717.64
MW-16
TOC= 757.54
DTW= 18.10
GWE= 739.44
MW-8
TOC= 737.60
DTW= 16.28
GWE= 721.32
MW-10
TOC= 678.24
DTW= 5.41
GWE= 672.83
SW-1-HG
SW-2-HG
MW-9
TOC= 719.03
DTW= 15.95
GWE= 703.08
MW-11
TOC= 680.07
DTW= 26.62
GWE= 653.45
MW-13
TOC= 671.31
DTW= 14.53
GWE= 656.78
MW-12
TOC= 671.48
DTW= 16.95
GWE= 654.53
MW-2
TOC= 665.81
DTW= 5.48
GWE= 660.33
MW-3A
TOC= 662.49
DTW= 8.02
GWE= 654.47
MW-10
TOC= 678.24
DTW= 5.41
GWE= 672.83
SW-2-HG
HOLLY GROVE
LANDFILLS
MW-1A
MW-5
SW-2
PROPERTY
LINE
TOC
DTW
GWE
G:\CAD\Davidson\Davdco 17-6\sheets\DAVDCO-B0854.dwg - 12/4/2017 12:39 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 HOLLY GROVE LANDFILLDAVIDSON COUNTY, NCJ.A.L.M.M.G.AS SHOWN2Dec 2017DAVDCO 17-6DAVDCO-B0854MW-4 LOCATED APPROX.
2,000 FT. N
N35°50'40.85"
W80°10'40.92"
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TABLES

September 2017 Groundwater Monitoring Report
Davidson County Holly Grove Landfill
Solid Waste Permit No. 29-02
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Table 1Groundwater ElevationsDavidson County Holly Grove 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 (TOC)Depth to Water** (ft)Groundwater Elevation (ft amsl)Screen Interval (ft bgs)Screen GeologyMW-1A 1/23/1990 35.83753 80.17098 2.0 40.2 778.68 781.39 31.78 749.61 27.5-37.5 metavolcanic bedrockMW-2 9/22/1987 35.84139 80.18294 2.0 20.0 704.59 665.81 5.48 660.33 11.8-16.8 dioriteMW-3A 1/23/1990 35.83236 80.17402 2.0 34.0 659.80 662.49 8.02 654.47 22-32 metavolcanic bedrockMW-4* 6/19/1991 35.84160 80.17795 2.0 62.6 731.10 736.20 55.65 680.55 47.5-62.5 schistMW-5 10/27/1992 35.84468 80.17803 2.0 28.3 682.10 664.29 11.93 652.36 10-25 metavolcanic bedrockMW-6 7/30/1997 35.84490 80.17870 2.0 67.1 676.29 781.25 63.61 717.64 55-65 dioriteMW-8 7/29/1997 35.84438 80.18226 2.0 58.7 661.31 737.60 16.28 721.32 47-57 dioriteMW-9 7/25/1997 35.83928 80.17440 2.0 22.5 717.65 719.03 15.95 703.08 11-21 clayey silty sand and dioriteMW-10 7/30/1997 35.84356 80.18383 2.0 14.7 667.00 678.24 5.41 672.83 5.5-13 clayey silt and dioriteMW-11 7/29/1997 35.84274 80.18392 2.0 42.0 689.22 680.07 26.62 653.45 28-38 dioriteMW-12 7/30/1997 35.84194 80.18391 2.0 64.5 709.29 671.48 16.95 654.53 55-65 dioriteMW-13 7/29/1997 35.83406 80.17554 2.0 25.2 668.59 671.31 14.53 656.78 12.5-22.5 sandy silt and graniteMW-14 7/24/1997 35.83152 80.17106 2.0 44.5 664.78 666.04 13.60 652.44 32-42 dioriteMW-15 7/25/1997 35.83310 80.17147 2.0 26.0 696.01 697.33 17.96 679.37 8.5-23.5 silty clay and graniteMW-16 12/7/2000 35.83744 80.17023 2.0 49.0 755.4699757.54 18.10 739.44 30-50 dioriteMW-17 12/7/2000 35.83565 80.17076 2.0 42.4 734.7394737.99 14.29 723.70 29.5-39.5 dioriteNOTE: * MW-4 is the same well as MW-1S associated with Davidson County Phase 1 Lined Landfill.amsl = above mean sea levelbgs = below ground surfaceWell construction information from well logs (provided in Appendix A)NA = Not Available** Depth to water measured from TOCH:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Davidson\25. Davidson 9-17\Sep-17 dav gw sampling tables.xlsxDocuSign Envelope ID: 8BB0D122-C022-4F9D-A196-A2263D188DEA
Table 2Field ParametersDavidson County Holly Grove LandfillSeptember 18-21, 2017By: WWDate: 11/11/2017WellpH Sp. Conductivity Temperature(std units) (uMhos) (degrees C)MW-1A6.42 1170 18.9 10.8MW-2 6.42 960 21.7 18.2MW-3A 7.22 855 21.01 3.89MW-4* 6.12 846 22.8 15.2MW-56.19 348 20.17 21.7MW-67.72 886 20.4 13.3MW-87.24 1063 19.1 13.6MW-96.34 1486 19.34 235MW-106.7 2598 21.6 95.3MW-11 6.4 2039 17.5 13.1MW-12 6.76 2517 18.57 38.1MW-13 6.4 2983 19.61 5.82MW-14 6.84 477 20.88 11.5MW-155.85 233 19.77 19.8MW-167.32 689 20.25 7.83MW-176.04 722 22.07 6.75NOTE:* MW-4 is the same well as MW-1S associated with Davidson County Phase 1 Lined Landfill.Data Collected by Smith Gardner, Inc. personnel.Turbidity (NTU)H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Davidson\25. Davidson 9-17\Sep-17 dav gw sampling tables.xlsxDocuSign Envelope ID: 8BB0D122-C022-4F9D-A196-A2263D188DEA
Table 3Detected Inorganic ParametersDavidson County Holly Grove LandfillSeptember 18-21, 2017By: MGDate:1/5/2018Constituent MDL SWSL2L or GWP MCL2B MW-1A MW-2 MW-3A MW-4* MW-5 MW-6 MW-8 MW-9 MW-10 MW-11 MW-12 MW-13 MW-14 MW-15 MW-16 MW-17 SW-1 SW-2Antimony 0.06 61 §6 640 <0.06 <0.06 <0.06 <0.06 <0.06 0.25 J <0.06 0.1 J 0.2 J 0.07 J 0.24 J 0.24 J <0.06 0.08 J 0.06 J <0.06 0.34 J 0.36 JArsenic 0.07 10 10 10 10 0.97 J 0.61 J 0.23 J 0.22 J <0.07 0.84 J 0.37 J 2.1 J 3.5 J 0.9 J 3 J 6.2 J <0.07 0.56 J 0.13 J <0.07 0.49 J 0.6 JBarium 0.07 100 700 2000 2000000 214 146 24.8 J 42.7 J 52.4 J 46.1 J 35.5 J 193 469 134 83.3 J 218 31.9 J 111 22.8 J 288 18.8 J 22.2 JBeryllium 0.07 14 §4 6.5 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 <0.07 0.27 J <0.07 <0.07 <0.07 <0.07 0.16 J <0.07 <0.07 <0.07 <0.07Cadmium 0.08 1 2 5 2 <0.08 0.23 J <0.08 <0.08 0.11 J <0.08 <0.08 <0.08 0.29 J 1 0.38 J <0.08 <0.08 0.11 J <0.08 <0.08 <0.08 <0.08Cobalt 0.24 101 §NE 2704.6 J 6.3 J0.24 J 0.32 J1.9 J<0.24 0.68 J9.2 J 27 2.9 J0.99 J170.51 J14<0.245.1 J0.57 J 0.73 JTotal Chromium 0.08 10 10 100 50 <0.08 1 J <0.08 <0.08 0.94 J 4 J <0.08 <0.08 8.6 J 0.7 J 0.21 J 0.47 J 0.38 J240.24 J <0.08 0.19 J 0.2 JCopper 0.09 10 1000 1300 7 1.2 J 8.2 J 0.75 J 1.1 J 4.4 J 1.5 J 1 J 1.1 J 62 85 2 J 1.2 J 2 J 16 0.77 J 3.3 J 2.7 J 2.9 JLead 0.08 10 15 15 25 <0.08 1.3 J <0.08 0.14 J 0.54 J 0.16 J 0.08 J 0.1 J 3.2 J 0.32 J 0.91 J <0.08 <0.08 1.4 J 0.43 J 0.21 J 0.18 J 0.2 JNickel 0.08 50 100 NE 88 3.6 J 3.4 J 1.5 J 1.5 J 5.2 J 0.93 J 2.3 J 6.2 J 51 17.3 J 9.1 J 26.9 J 0.94 J 14.9 J 1.2 J 1.2 J 8.3 J 8.6 JSelenium 0.50 10 20 50 5 <0.51 1.7 J 1.1 J 1 J <0.51 0.59 J 1.2 J 1.3 J <0.5 4.7 J <0.5 <0.5 0.71 J 0.67 J 1.9 J 0.62 J <0.51 <0.51Thallium 0.08 5.50.28§2 0.47 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 0.11 J <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08 <0.08Vanadium 0.24 250.3 §NE NE4.4 J 4.4 J 2.9 J 2.6 J 6.5 J 4.7 J 0.8 J 1.9 J 59 2.2 J 1.9 J 7.6 J 4.2 J 22.6 J 2.1 J 4.9 J2 J 2.1 JZinc 0.66 10 1000 5000 50 1.6 J 19 <0.66 <0.66 8.9 J <0.66 1.3 J <0.66 23 7 J 1.5 J 1.4 J 1.4 J 39 0.78 J 5.9 J 14 12NOTE: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 Limit2B-NCAC 2B Standard for Class C watersBOLD-Detection above 2L or GWP StandardJ-Laboratory defined detection between MDL and SWSL limit< MDL -Constituent not detected above the MDL value*MW-4, the upgradient well, is also known as MW-1S for the Phase 1 lined landfill. (Data from Environment 1, Inc. report dated 11/1/2017, Client ID#6038.)Table units are presented in ug/l.Lab data analysis by Environment 1, Inc. report dated 11/1/2017, Client ID#6037.Sep-17 dav gw sampling tables.xlsxDocuSign Envelope ID: 8BB0D122-C022-4F9D-A196-A2263D188DEA
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Table 4Detected Organic ParametersDavidson County Holly Grove LandfillSeptember 18-21, 2017By: MGDate: 1/5/18Parameter MDL SWSL 2L MCL MW-1A MW-2 MW-3A MW-5 MW-6 MW-8 MW-9 MW-10 MW-11 MW-12 MW-13 MW-14 MW-15 MW-171,1-dichloroethane0.20 5 6 NE 27.3 0.4 J6.80.4 J10.5 24.80.6 J <0.2 2.2 J6.40.3 J 1.1 J 1.5 J8.41,1-dichloroethene 0.17 5 7 7 <0.17 <0.17 0.3 J <0.17 <0.17 0.3 J <0.17 <0.17 <0.17 0.5 J <0.17 <0.17 <0.17 <0.171,2-dichlorobenzene 0.32 5 20 600 <0.32 <0.32 <0.32 <0.32 <0.32 <0.32 0.5 J <0.32 0.5 J 0.5 J 1.1 J <0.32 <0.32 <0.321,2-dichloroethane0.27 1 0.4 51.7<0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.27 <0.270.4 J<0.27 <0.27 <0.27 <0.271,2-dichloropropane0.21 1 0.6 54.2<0.21 <0.21 <0.210.6 J0.3 J 0.4 J <0.21 0.3 J 0.4 J <0.21 <0.21 <0.21 0.5 J1,4-dichlorobenzene 0.39 1 6 75 5.80 <0.39 0.9 J <0.39 <0.39 <0.3970.8 J 1.3 4.87.8<0.39 <0.39 <0.39acetone 9.06 100 6000 NE 21.8 J <9.06 <9.06 <9.06 <9.06 <9.06 <9.06 <9.06 <9.06 <9.06 <9.06 <9.06 <9.06 <9.06benzene 0.24 1 1 53.50<0.24 0.4 J <0.24 <0.24 0.9 J2.70.3 J <0.24 0.9 J2.7<0.24 <0.24 <0.24chlorobenzene0.30 3 50 100 0.6 J 1 J 0.6 J <0.3 <0.3 <0.3 8.10 2.4 J 3.70 5.70 19 <0.3 <0.3 <0.3chloroethane0.48 10 3000 NE 3.6 J <0.48 <0.48 <0.48 <0.48 2 J <0.48 0.5 J <0.48 10.4 44.3 <0.48 <0.48 0.5 Jcis-1,2-dichloroethene 0.25 5 70 70 46.8 <0.25 1 J <0.25 1.5 J 1.3 J <0.25 <0.25 0.4 J <0.25 <0.25 <0.25 <0.25 1.8 Jtrichlorofluoromethane 0.24 1 2000 NE <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 <0.24 1.3 <0.24 <0.24trans-1,2-dichloroethene 0.23 5 100 100 0.6 J <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23tetrachloroethene 0.17 1 0.7 5 <0.17 <0.17 0.2 J <0.17 0.6 J <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17 <0.17trichloroethene0.23 1 3 5 1.20 <0.23 0.3 J <0.23 0.3 J 2.3 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.3 Jtoluene 0.23 1 600 1000 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 <0.23 0.3 J <0.23 <0.23 <0.23vinyl chloride0.63 1 0.03 22.80<0.630.9 J<0.63 <0.63 <0.63 <0.63 <0.63 <0.632.00<0.63 <0.63 <0.63 <0.63NOTE:MDL -Method Detection LimitSWSL -Solid Waste Section Quantitation Limits2L-Groundwater Standards (15A NCAC 2L 0200)MCL - Federal Maximum Contaminant LimitBOLD-Detection above 2L standardJ-Laboratory defined detection between MDL and SWSL limit<MDL -Constituent not detected above MDLTable units are presented in ug/l.Lab data analysis by Environment 1, Inc. report dated 4/28/2016, Client ID#6037.*MW-4, the upgradient well, is also known as MW-1S for the Phase 1 lined landfill. (Data in Environment 1, Inc. report dated 4/20/2017, Client ID#6038.)No organic detections were reported in samples collected from the MW-4 location for this sampling event.H:\Projects\Groundwater Monitoring\2. Groundwater Monitoring Reports\Davidson\25. Davidson 9-17\Sep-17 dav gw sampling tables.xlsxDocuSign Envelope ID: 8BB0D122-C022-4F9D-A196-A2263D188DEA
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Appendix A
Well Logs

September 2017 Groundwater Monitoring Report
Davidson County Holly Grove Landfill
NC Solid Waste Permit No. 29-02
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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 (from TOC)DEPTHBLOW COUNTSAMPLING METHODRECOVERYDRILL METHODDESCRIPTION LITHOLOGYWELLINSTALLATION0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0DEPTHSmith Gardner, Inc.
14 North Boylan Avenue, Raleigh NC 27603
[phone] Page 1 of 1
GROUND ELEV.:
NORTHING:EASTING:0 0
Per 6"FeetInchesFeetMW-16
HSA/AH
Davidson County - Holly Grove Landfills
Lexington, NC
Engineering Tectonics, P.A.
R. Barron
P. May
12/7/00 1/11/00
50
SS
SS
6"
0"
HSA
AH
PWR: Dry tan-orange partially weathered rock w/
white mottles throughout.
DIORITE: Competent diorite.
DIORITE: Competent diorite. Boring terminated at
50'.
26,50/5"
50/0"
38.0
16:00
1/11/00
41.69
1/24/01
10:00
NA
DocuSign Envelope ID: 8BB0D122-C022-4F9D-A196-A2263D188DEA
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 (from TOC)DEPTHBLOW COUNTSAMPLING METHODRECOVERYDRILL METHODDESCRIPTION LITHOLOGYWELLINSTALLATION0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0DEPTHSmith Gardner, Inc.
14 North Boylan Avenue, Raleigh NC 27603
[phone] Page 1 of 1
GROUND ELEV.:
NORTHING:EASTING:0 0
Per 6"FeetInchesFeetMW-17
HSA/AH
Davidson County - Holly Grove Landfills
Lexington, NC
Engineering Tectonics, P.A.
R. Barron
P. May
12/7/00 12/8/00
39.5
SS
SS
SS
12"
10"
0"
HSA
AH
SILTY SAND: Dry tan-orange fine silty sand w/
iron & manganese mottles
CLAYEY SILTY SAND: Slightly moist brown
clayey fine silty sand with iron & manganese
mottles and some light gray clay seams.
DIORITE: Competent diorite.
DIORITE: Competent diorite. Boring terminated at
39.5'.
17,34,37
11,13,17
50/0"
38.5
16:00
12/7/00
22.5
12/8/00
8:00
NA
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Appendix B
Laboratory Analytical Report

September 2017 Groundwater Monitoring Report
Davidson County Holly Grove Landfill
NC Solid Waste Permit No. 29-02
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