6301_Moore_MSWLF_CDLF_LFGMP_FID1387273_20200106

I;� GOLDER
REPORT
LANDFILL GAS MONITORING PLAN - MOORE
COUNTY LANDFILL, PERMIT NO. 63-01
Volume 2 - Moore County Design Hydrogeologic Report and Monitoring Plans
Submitted to:
Ms. Jaclynne Drummond
Department of Environmental Quality
Division of Waste Management
Solid Waste Section
2090 US Highway 70
Swannanoa, NC 28778
[phone]
Submitted by:
Golder Associates NC, Inc.
5B Oak Branch Drive, Greensboro, North Carolina, US,
[phone]
1 0099 2'I
C

December 2019
Distribution List
1895531
Chao, Ming-Tai, PE, Environmental Engineer, NC DEQ, Division of Waste Management, Solid Waste Section,
Permitting Branch, 1646 Mail Service Center, Raleigh, NC 27699-1646, [e-mail]
Drummond, Jaclynne, Hydrogeologist, NC DEQ, Division of Waste Management, Solid Waste Section, 2090 US
Highway 70, Swannanoa, NC 28778, [e-mail]
Gould, Randy, PE, Director, Moore County, Department of Public Works, 5227 US Highway 15, Carthage, NC
28327-1927, [e-mail]
Lambert, David, Solid Waste Director, Moore County, Department of Public Works, 5227 US Highway 15,
Carthage, NC 28327-1927, [e-mail]
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Executive Summary
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On behalf of Moore County, Golder Associates NC, Inc. (Golder) is submitting the enclosed Landfill Gas
Monitoring Plan for the Moore County Landfills, North Carolina Solid Waste Permit (NC SWP) # 63-01. Moore
County owns and/or operates an active Construction and Demolition (C&D) landfill and a closed Municipal Solid
Waste (MSW) landfill under NC SWP #63-01. This Landfill Gas Monitoring Plan has been prepared in
accordance with the North Carolina Solid Waste Management Rules (NC SWMR) Title 15A of the North Carolina
Administrative Code (NCAC) 13B .0544(d) as it relates to the active construction and demolition (C&D) landfill and
in accordance with the approved Landfill Gas Remediation Plan (Golder, 2018) as it relates to the closed
municipal solid waste (MSW) landfill. Both landfills currently monitor for landfill gas on a quarterly basis to ensure
that landfill gas does not exceed the lower explosive limit (LEL) at the facility property boundary or at 25 percent
of the LEL in facility structures.
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Table of Contents
1.0
INTRODUCTION.............................................................................................................................................1
1.1 Background..........................................................................................................................................1
1.2 Site Geology.........................................................................................................................................2
1.3 Regulatory Limits.................................................................................................................................2
2.0
LANDFILL GAS MONITORING......................................................................................................................2
2.1 Current Compliance Landfill Gas Monitoring Locations......................................................................2
2.2 Proposed Compliance Landfill Gas Monitoring Locations...................................................................3
2.3 Landfill Gas Monitoring Frequency......................................................................................................4
3.0
LANDFILL GAS SAMPLING PROCEDURES...............................................................................................4
3.1 DETECTION EQUIPMENT USED.......................................................................................................5
3.2 LANDFILL GAS SAMPLING PROCEDURES......................................................................................5
3.2.1 Landfill Gas Monitoring Well Gas Concentration Measurements...................................................6
3.2.2 Facility Structure Gas Concentration Measurements.....................................................................6
3.3 WELL DECOMMISSIONING PROCEDURES.....................................................................................6
4.0
RECORD KEEPING AND REPORTING........................................................................................................6
4.1 Landfill Gas Monitoring Form...............................................................................................................6
4.2 Sampling Reports.................................................................................................................................7
4.3 Permanent Record Keeping.................................................................................................................7
5.0
CONTINGENCY PLAN...................................................................................................................................7
DRAWINGS
Drawing 1 Landfill Gas Monitoring Plan
FIGURES
Figure 1 Landfill Gas Probe (Typical)
Figure 2 Sample Landfill Gas Monitoring Log
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1.0 INTRODUCTION
This Landfill Gas Monitoring Plan will serve as guidance for monitoring landfill gas at the Moore County Landfills
in Aberdeen, North Carolina, in accordance with Title 15A of the North Carolina Administrative Code (NCAC)
Subchapter 13B .0544(d) as it relates to the active construction and demolition (C&D) landfill and in accordance
with the approved Landfill Gas Remediation Plan (Golder, 2018) as it relates to the closed municipal solid waste
(MSW) landfill. The Moore County Landfill is located at 456 Turning Leaf Way between the towns of Pinehurst
and Aberdeen in Moore County, NC. As presented, the County owns and/or operates an active Construction and
Demolition (C&D) landfill and a closed Municipal Solid Waste (MSW) landfill under North Carolina Solid Waste
Permit (NC SWP) #63-01.
1.1 Background
The physical location of the Moore County Landfill is shown in the inlay on Drawing LFG-1. The Moore County
Landfill is located in the southwestern part of Moore County. The site is located within the jurisdiction of the town
of Pinehurst, NC. The site is accessed from NC Highway 5, located to the east of the facility. The facility is
hydraulically bound to the west by Horse Creek and to the north and south by unnamed tributaries of Horse
Creek. The location of these surface water features is shown on Drawing LFG-1. As presented on Drawing
LFG-1, topographic surface elevations at the facility range from approximately 460 feet above mean sea level
(AMSL) along the eastern portion of the closed MSW landfill, to approximately 350 feet AMSL in the southwestern
portion of the facility. The site is surrounded predominantly by wooded, agricultural, or rural residential properties.
The Moore County Landfill comprises approximately 314 acres and contains an active C&D landfill unit, a closed
unlined MSW landfill unit, and several land clearing and inert debris (LCID) landfill units. In conjunction with
Moore County, Republic Services of NC, LLC operates a solid waste transfer station located on the southwestern
portion of the property. The MSW landfill accepted waste from approximately 1968 to 1993 and was closed prior
to October 1993, with final closure approved in December 1996; the County expressed their intent to comply with
post -closure monitoring regulations in January 1997. The MSW area encompasses approximately 60 acres, 12 of
which have a clay cap. The County began transferring MSW waste in 1993. The County temporarily stockpiled
C&D waste from approximately 1993 to 1996, until the current C&D landfill was permitted and constructed (HDR,
2005).
As presented, landfill gas is currently monitored on a quarterly basis at both the closed MSW landfill and the
active C&D landfill in accordance with the current landfill gas monitoring plan, 15A NCAC 13B .0544(d), and the
approved Landfill Gas Remediation Plan (i.e., at the closed MSW landfill). A brief synopsis of the compliance and
remediation history is below.
In November 1999, a work plan was submitted to NC DEQ by HDR Engineering Inc. of the Carolinas (HDR) to
address off -site groundwater and methane migration concerns. HDR submitted an assessment of corrective
measures (ACM) for groundwater in July 2005 with monitored natural attenuation (MNA) as the primary proposed
remedy with a contingency plan for active LFG remediation if increasing trends in volatile organic constituents
(VOCs) were observed in groundwater. In 2005, a shallow trenching and venting network consisting of a trench
and twelve (12) passive LFG vents was installed to address off -site LFG migration concerns; this network was
expanded via twelve (12) additional passive LFG vents in 2007. Three (3) vertical in -waste passive LFG gas
extraction wells (GV-30, GV-31, and GV-32) were installed in February 2014 as part of the Contingency Plan
Update and Implementation Plan -Revised (Joyce Engineering, 2013) approved by NC DEQ on June 5, 2013. In
November 2018, a landfill gas cut-off trench (approximately 150 feet long) was installed to a depth near the top of
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groundwater south of MW-15 (historically the main area of landfill gas migration across the Northern property
boundary).
1.2 Site Geology
The Moore County Landfill is located in the inner Coastal Plain Physiographic Province of North Carolina. The
geologic units of this region are relatively young, dating from the Cretaceous to the Tertiary period (NCGS, 1985).
The site is underlain by sands, silts, and clays of the Middendorf Formation, which generally consists of
intercalated, lenticular, thick -bedded, light-colored sands and clays (mudstones) with local concentrations of clay -
cast conglomerates (NCGS, 1985 and Soh/ and Owens, 1991).
The uppermost groundwater beneath the facility is present in a shallow, unconfined aquifer comprised of sands
mixed with thin clay seams and larger seams of fine sand. The uppermost aquifer at the site is approximately 55
feet thick and underlain by a clay confining layer (HDR, 2005). Groundwater occurs at depths varying form
approximately 5 to 38 feet below ground surface (bgs) across the entire site.
Surface water and groundwater at the site generally flows to the west and southwest toward Horse Creek, which
is located along the western property boundary. Limited surface water and groundwater flows to the north and
south to unnamed tributaries of Horse Creek located along the northern and southern property boundaries.
Historically, the average estimated linear groundwater flow velocity for the subsurface at the facility is around 300
feet/year.
1.3 Regulatory Limits
Currently, the regulatory limit of methane (a component of landfill gas) in the landfill gas compliance monitoring
probes in NC is equal to the lower explosive limit (LEL) of 5% methane by volume in air. The regulatory limit of
methane in facility structures is 25% of the LEL or 1.25% methane by volume in ambient air. There are currently
no other regulatory limits applicable to this facility with regards to landfill gas. The LEL for hydrogen sulfide a
minor component of landfill gas is 4% hydrogen sulfide by volume in air; however, the National Institute of
Occupational Safety and Health (NIOSH) immediately dangerous to life or health (IDLH) limit for hydrogen sulfide
is 100 parts per million (ppm). In accordance with 15A NCAC 13B .0544, Moore County also monitors for
hydrogen sulfide at the C&D landfill as it is interpreted by NC DEQ as "other explosive gases." Moore County
also monitors for hydrogen sulfide at the MSW landfill due to historic and recent detections of hydrogen sulfide in
landfill gas.
2.0 LANDFILL GAS MONITORING
The following sections discuss the proposed locations of landfill gas monitoring wells, the monitoring of structures,
and the monitoring frequency.
2.1 Current Compliance Landfill Gas Monitoring Locations
The current Moore County landfill gas compliance network consists of twelve methane compliance points (i.e.,
GP-9, GP-10, GP-11, GP-12, GP-13, GP-14, GP-15, GP-16, GP-17, MW-6, and MW-15), three on -site structures
(i.e., the scalehouse, the maintenance shop, and the transfer station), and one off -site structure (i.e., the Blake
house crawlspace) on a quarterly basis. The current compliance methane monitoring locations are shown on
Drawing LFG-1.
Based on topography and physical features such as streams, potential landfill gas is expected to migrate to the
south, southwest, west, north east and north; therefore, the current network is representative and protective of
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human health and the environment. However, as part of the proposed Phase VI expansion of the landfill three of
the existing landfill gas probes in the compliance monitoring network will need to be replaced. In addition, Moore
County proposes to replace monitoring points MW-6 and GP-10 as described in the next section. As part of the
approved Landfill Gas Remediation Plan (Golder, 2018), compliance monitoring point MW-15 was converted to a
landfill gas probe to monitor the effectiveness of the landfill gas trench which was installed and completed in
November 2018. Moore County proposes to rename this monitoring point GP-18.
2.2 Proposed Compliance Landfill Gas Monitoring Locations
As presented, below is a summary of the proposed changes to the current landfill gas compliance monitoring
network:
GP-13 shall be replaced by GP-13R (installed May 2018)
GP-14 shall be replaced by GP-14R (installed May 2018)
GP-15 shall be replaced by GP-15R (installed June 2018)
MW-15 shall be renamed GP-18
MW-6 shall be replaced as a methane monitoring point by GP-19, which will be located closer to
the property boundary (not yet installed)
GP-10 shall be abandoned and replaced with GP-1 OR, which will be located closer to the property
boundary (not yet installed)
After these changes are incorporated the new landfill gas monitoring network shall consist of the following landfill
gas compliance locations:
Compliance Point I
Approximate Depth to
113ottom (ft bgs):
Estimated Depth to
Groundwater (ft bgs):
Waste Unit Monitored -
ocation Relative to the
caste Units:
-
(proposed)
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mpliance Point I
Approximate Depth to Estimated Depth to
ottom (ft bgs): Groundwater (ft bgs):
are Monitored -
ocation Relative to the
Waste Units:
•13
(proposed
1.) ft bgs = feet below ground surface
2.) MSW = closed municipal solid waste landfill
3.) C&D = active construction and demolition landfill
4.) N, S, SE, W = north, south, southeast, west
5.) Estimated Depth to Groundwater shown was approximated based on the April 2019 Groundwater Contour Map.
The estimated depth to groundwater on the table above for each location was estimated using the groundwater
surface contours provided on Drawing DH-3 (of the Design Hydrogeologic Report). As presented the depths for
GP-1 OR and GP-19 are shown on the above table as proposed as these monitoring points have not yet been
installed. These locations will be installed upon approval of this Landfill Gas Monitoring Plan. Actual depths of
these locations will be determined by field observations during installation.
The proposed landfill gas probes will be installed approximately 3 feet above the static water level to account for
seasonal high-water level fluctuations. The proposed probes will be constructed of 2-inch PVC with 0.010-inch
slotted screen from the bottom of the well up to 5 feet below ground surface. A coarse clean sand will be used to
fill the annular space to approximately 2 feet above the screen. An approximately 2-foot thick bentonite seal will
be placed above the sand. The remaining annular space will be filled with a cement mixture. The surface
completion of each gas probe will consist of a three (3) feet by three (3) feet by half (0.5) foot concrete well apron
and a locking protective casing. The top of the PVC riser will be equipped a well cap with a stopcock valve or
quick connect coupling. A diagram of a typical landfill gas probe is provided as Figure 1.
As presented, three on -site structures (i.e., the scale house, the maintenance building, and the transfer station
office) are currently monitored for landfill gas on a quarterly basis. One off -site structure (the Blake residence
crawl space) is currently monitored due to historical landfill gas migration along the northern property line as
documented in the Landfill Gas Remediation Plan (Golder, 2018) for the MSW landfill. Moore County proposes to
continue sampling these locations as prescribed.
2.3 Landfill Gas Monitoring Frequency
As presented, currently landfill gas compliance monitoring is performed on a quarterly basis as required in 15A
NCAC 13B .0544(d)(2)(B) and in accordance with NC DEQ Landfill Gas Monitoring Guidance (NC DENR, 2010).
If the explosive action level or compliance level is exceeded for methane gas at a compliance monitoring location,
in accordance with 15A NCAC 13B .0544(d)(3)(C) a Landfill Gas Remediation Plan Addendum will be prepared,
and an alternate monitoring frequency will be considered, if on -site or nearby off -site conditions change (i.e., the
risk factors warrant more frequent monitoring).
3.0 LANDFILL GAS SAMPLING PROCEDURES
The following sections outline the recommended procedures for performing the required landfill gas monitoring at
landfill gas probes, vents, and facility structures.
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3.1 DETECTION EQUIPMENT USED
The GEM-5000 Plus (or GEM-2000 Plus) is the preferred monitoring device for monitoring landfill gas at this
facility. The GEM-5000 Plus (and GEM-2000 Plus) are capable of measuring hydrogen sulfide and carbon
monoxide concentrations in landfill gas. Alternatively, a digital or analog manometer combined with a vacuum -
pump -equipped monitoring device designed to measure methane gas and hydrogen sulfide concentrations can be
used.
In addition to the monitoring device(s), the following equipment and documents should be readily available during
monitoring events:
Copy of the facility's Landfill Gas Monitoring Plan
A copy of the Operation Manual(s) for the equipment being used during monitoring
Blank copies of the Landfill Gas Monitoring Log (a sample Landfill Gas Monitoring Log is provided in
Figure 2)
Calibration gas (if applicable)
Barometer (if available)
Personal protective equipment (site -specific)
Necessary keys (site -specific)
Landfill gas monitoring equipment should be calibrated in the field on the day of use. Generally, one calibration
per day is sufficient. In some instances where highly variable concentrations are being observed, it may be
necessary to re -calibrate the monitoring device during the work day to ensure that instrument drift is minimal.
Instrument drift can be checked with a calibration gas of known concentration. If more than a 3% difference is
observed between the instrument reading and the gas standard during an instrument drift check, the unit should
be recalibrated.
Field calibration should be performed in accordance with the instrument manufacturer's recommendations using
an approved gas standard. Generally, when landfill gas monitoring probes or other compliance monitoring points
calibration gas composed of 15% by volume methane or less (i.e., ideally 5% by volume methane). Field
calibration activities shall be documented on a calibration log. Landfill gas monitoring equipment should also be
calibrated by the manufacturer or supplier in accordance with the recommended schedule for that instrument.
3.2 LANDFILL GAS SAMPLING PROCEDURES
Prior to mobilizing to the site, weather conditions at the Moore County landfill shall be observed and deemed
acceptable for landfill gas monitoring per the NC DEQ Landfill Gas Monitoring Guidance (NC DENR, 2010). As
presented, upon arriving at the site the landfill gas monitoring equipment shall be calibrated, next the sampler
shall record the weather conditions at the site, including the barometric pressure, ambient temperature, and wind
speed and direction. The temperature and barometric pressure should be logged at the beginning and ending of
each field day. Site -specific barometric pressure readings are preferred. In the event that a barometer is not
available, barometric pressure readings from a nearby weather station can be used. Per the NC DEQ Landfill
Gas Monitoring Guidance (NC DENR, 2010), landfill gas monitoring shall be conducted between noon and
sunset.
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3.2.1 Landfill Gas Monitoring Well Gas Concentration Measurements
Before connecting the monitoring instrument to the landfill gas monitoring well, purge the connector tube for at
least one minute prior to taking reading. Connect the instrument tubing to the landfill gas monitoring well cap fitted
with a stopcock valve or quick connect coupling. Open the valve and record the initial reading and then the
stabilized reading for methane and hydrogen sulfide. A stable reading is one that does not vary more than 0.5
percent by volume on the instrument's scale. Turn the stopcock valve to the off position and disconnect the
tubing. Proceed to the next landfill gas monitoring well and repeat.
3.2.2 Facility Structure Gas Concentration Measurements
Confined spaces, which require a confined space permit to enter, are excluded from these general monitoring
requirements. On -site and off -site structures [i.e., the scale -house, maintenance building, transfer station office,
and the Blake residence crawl space (second bullet)] shall be monitored as detailed below:
After entering the designated structure, turn on the gas monitoring device and vacuum pump and
traverse the accessible and open area of the facility structure while holding the intake hose for the
monitoring device at shoulder height. During the traverse, observe the meter for any measurable
methane concentrations and record the time and concentration on the monitoring log.
If measurable methane concentrations are observed in a facility structure, attempts to identify the
source of the methane should be made. If the facility structure is elevated and has a crawl space,
the crawl space beneath the facility should be monitored from outside of the structure on accessible
sides to determine if the methane gas is migrating into the structure from the crawl space. Do not
enter a crawl space beneath a structure without proper authorization and sufficient personal
protection equipment, including an oxygen monitoring device, since these areas may be considered
confined spaces. If the facility structure is constructed on grade, ambient air near the exterior walls
at floor level or near cracks in the floor, if exposed, should be monitored to determine if gas is
migrating upward along or through the foundation.
3.3 WELL DECOMMISSIONING PROCEDURES
If a landfill gas monitoring probe requires decommissioning, an abandonment record shall be submitted to NC
DEQ within thirty (30) days of the decommissioning. The landfill gas monitoring probe(s) shall be decommissioned
in accordance with 15A NCAC 2C .0113(d) by a certified well driller. The landfill gas monitoring probe(s) shall be
over -drilled and sealed with grout via tremie-pipe if located in the future waste footprint. The landfill gas
monitoring probe(s) shall be sealed with grout and all surface completions removed if not located in the future
waste footprint. The decommissioning report will be sealed by a North Carolina Licensed/Professional Geologist.
RECORD KEEPING AND REPORTING
Quarterly landfill gas compliance monitoring results and semiannual assessment monitoring results shall be
maintained by the facility operator for the life of the facility operation, closure, and post -closure care periods.
4.1 Landfill Gas Monitoring Form
The date, time, location, sampling personnel, equipment, atmospheric temperature, reported barometric pressure,
general weather conditions at the time of sampling, and the concentration of methane and hydrogen sulfide shall
be recorded on the Landfill Gas Monitoring Field Log (see Figure 2).
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December 2019
4.2 Sampling Reports
1895531
A letter report that includes the Landfill Gas Monitoring Form and a map showing the monitoring locations will be
prepared after each monitoring event. As presented, monitoring records will be kept on site in the facility files. If
explosive gas concentrations are detected in excess of allowable regulatory limits (presented in Section 1.3) in
any compliance monitoring point(s) Moore County will in accordance with 15A NCAC 13B .0544(d)(3):
Immediately take all steps necessary to ensure the protection of human health and the environment
and a notification will be provided to the NC DEQ
Within 7 days of the exceedance, the landfill gas monitoring report will be placed in the facility
monitoring records
And the facility will update and implement a Landfill Gas Remediation Plan Addendum. NC DEQ will
be provided a copy of the Landfill Gas Remediation Plan Addendum.
4.3 Permanent Record Keeping
As presented above, a copy of each quarterly report shall be retained on -site as part of the permanent operating
record for the facility.
5.0 CONTINGENCY PLAN
As presented in Section 1.3, pursuant to the 15A NCAC 13B .0544(d)(1), the compliance levels for landfill gas
monitoring are 25% of the lower explosive LEL for methane and other explosive gasses (1.25% methane by
volume) in facility structures (excluding gas control or recovery system components) and 100% of the LEL (5%
methane by volume) for methane at the facility boundary. In addition to the reporting requirements above, if either
of these compliance levels is exceeded, the operator shall take all immediate steps necessary to protect public
health and safety, including those required by the contingency plan. The contingency plan for this facility is as
follows:
Evacuating all personnel from any facility structure(s) exceeding the safe LEL levels
Notifying local fire officials of the exceedance if there are habitable structures within 1,000 feet of the
property boundary
Isolate the effective area and post signs around the affected area indicating the potential health and
safety risk and limit access (as practical)
Post signs in the affected area indicating a "No Smoking" area
Appropriate safety training for all personnel entering in the isolated area
Notify NC DEQ in a written statement within seven working days of learning that action levels have
been exceeded and indicate what has been done or is planned to be done to resolve the problem.
Begin initial remediation actions, which may include the following activities:
Additional temporary gas monitoring probe installations and sampling to determine the extent of
the gas migration
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Increased monitoring of probes, structures, and any identified preferred flow pathways to verify
concentrations and to protect human health
Implement a remediation plan for the explosive gas releases and submit it to NCDEQ for
amendment of the facility permit
The Landfill Gas Remediation Plan Addendum shall describe the nature and extent of the problem and the
proposed remedy. The plan shall include an implementation schedule specifying timeframes for implementing the
corrective actions, an evaluation of the effectiveness of such corrective actions, and milestones for proceeding in
implementation of additional corrective actions, if necessary, to re-establish compliance. Gas control systems
proposed in the Landfill Gas Remediation Plan Addendum shall be designed to:
Prevent methane accumulation in on -site structures
Prevent methane compliance level exceedances at the facility boundary
Provide for the collection, treatment, and destruction/disposal of decomposition gases and
condensate
Comply with Clean Air Act requirements, as applicable
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December2019
PROFESSIONAL CERTIFICATION
1895531
The Landfill Gas Monitoring Plan for the Moore County closed MSW and active C&D landfills at this facility has
been prepared by a qualified geologist who is licensed to practice in the State of North Carolina. The plan has
been prepared based on first-hand knowledge of site conditions and familiarity with North Carolina solid waste
rules and industry standard protocol. This certification is made in accordance with North Carolina Solid Waste
Regulations, indicating this Landfill Gas Monitoring Plan should provide early detection of any release of
hazardous constituents to the uppermost aquifer, so as to be protective of public health and the environment. No
other warranties, expressed or implied, are made.
GOLDER ASSOCIATES NC, INC.
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Benjamin S. Draper, PG
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Not valid unless this document bears the seal of the above mentioned licensed professional.
GOLDER

December 2019
1895531
REFERENCES
Golder Associates NC, Inc. (Golder), Landfill Gas Remediation Plan, Moore County Closed MSW Landfill, NC
SWP# 63-01, Submitted to NC DEQ: January 31, 2018.
HDR Engineering, Inc. of the Carolinas (HDR), Assessment of Corrective Measures Report, Moore County
Landfil, NC SWP# 63-01, Submitted to NC DNER: July 29, 2005.
Joyce Engineering, Inc., Contingency Plan Update and Implementation Plan — Revised, Moore County
Landfill, NC SWP# 63-01, Submitted to NC DENR: May 16, 2013.
North Carolina Department of Environment and Natural Resources (NC DENR). Landfill Gas Monitoring
Guidance, November 2010.
North Carolina Geologic Survey (NCGS). Geologic Map of North Carolina, 1985.
Sohl, Norman F. and Owens, James P., Cretaceous Stratigraphy of the Carolinas Coastal Plain, The Geology
of the Carolinas, pages 191-220, 1991.
4 GOLDER 10

December 2019
Signature Page
Sincerely,
Golder Associates NC, Inc.
Benjamin S. Draper, PG, PMP
Senior Project Geologist
BSD/RPK/bsd:
Rachel P. Kirkman, PG
Associate and Senior Consultant
Engineering Lic. No. C-2862/Geology Lic. No. C-399
Golder Associates NC, Inc. is a licensed user of the Golder trademark, and an associated operating entity.
Golder and the G logo are trademarks of Golder Associates Corporation.
g:\projects\moore county\_current engineering\2018 permit amendment (env)\monitoring plans\lfg monitoring plan\final\63-01_20191210 landfill gas monitoring plan.docx
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4 GOLDER 11

DRAWINGS

BLAKE RESIDENCE (CRAWL SPACE MONITORED)
# t)r 1 111-1
LEGEND
-
STREAM, POND, AND WETLAND LIMITS
EXISTING 10 FT GROUND SURFACE CONTOUR
EXISTING 2 FT GROUND SURFACE CONTOUR
PROPERTY LINE
APPROXIMATE LIMITS OF WASTE
- - - - - - - - - -
- EXISTING ROAD
O MW-1
MONITORING WELL AND IDENTIFICATION
,&GP-10
METHANE PROBE AND IDENTIFICATION
A,GP-10
PROPOSED METHANE PROBE AND IDENTIFICATION
LANDFILL GAS TRENCH VENTS AND IDENTIFICATION
PASSIVE LANDFILL GAS VENTS
i
r
�' -,.� �� l NOTES
1. TOPOGRAPHIC CONTOUR INTERVAL - 2 FEET
QMW8_ a 5 a 3 z
GP v16� - " i \` -J 2. PROPERTY BOUNDARY SURVEY BY JAMES L. WRIGHT DATED NOVEMBER 1984. ITS LOCATION
)I IS RELATIVE TO TOPOGRAPHY APPROXIMATE BY HDR ENGINEERING INC.
QJ
c c ��( 3. EXISTING TOPOGRAPHY WITHIN ACTIVE AND PROPOSED LANDFILL PROVIDED BY MATTHEWS
LAND SURVEYING &MAPPING, PLLC DATED APRIL 17 2015 AND JUNE 2018.
4. MONITORING WELLS MW-8 THROUGH MW-18 SURVEYED APRIL 1995, SEPTEMBER 1996, AND
APRIL 2003 BY HDR ENGINEERING INC.I ED BUCKNER RLS APRIL 17, 2015.
GP-ITO B ABAND
ON, 5. THE LOCATIONS OF LANDFILL GAS TRENCH VENTS ARE APPROXIMATE.
�P-15R ABANDON,D) .�� � � '� _)
\ \AC&DE// 'ff o8c D 6. NOTE GP-18 IS FORMER GROUNDWATER MONITORING WELL MW-15 (AS DETAILED IN THE 32 3 O LANDFILL GAS MONITORING PLAN (GOLDER 2019)
CLOSED
MSW gyp"
_LAN
3, Q
IL
� P-14R__ `
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(TO BE ABANDONED) � / y � i FL. \ 30 „
,(TO BE ABANDONED)=
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MAINTENANCE SHOP
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SITE LOCATION MAP
NOT TO SCALE
SCALEHOUSE
CLIENT
MOORE COUNTY PUBLIC WORKS
PO BOX 1927
CARTHAGE, NORTH CAROLINA
CONSULTANT PE C-2862 YYYY-MM-DD
2019-09-24
PG C-399 PREPARED
BSD
GOLDER DESIGN
BSD
REVIEW
RPK
GOLDER ASSOCIATES NO, INC. APPROVED
RPK
0 200 400 s
U
SCALE FEET
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PROJECT o
MOORE COUNTY LANDFILL (PERMIT #63-01)
456 TURNING LEAF WAY
ABERDEEN, NORTH CAROLINA
TITLE -
LANDFILL GAS MONITORING PLAN
PROJECT No. Rev. DRAWING
1895531 004 0 LFG-1

FIGURES

Figure 1— Landfill Gas Monitoring Well Detail
SAMPLING PORT
WELL CAP
(NOT CEDED)
f
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f X
I M
i r
WELL TAC (INCLUDE THE
FOLLDWINC INFORMATION) _
WELL ID.:
DRrLLING COMPANY:
DATE OF INSTALLATION:
TOTAL DEPTH:
CONSTRJuTION DETAILS: 3'
4a4' L(XKABLE STEEL CASING
(3' WIN_ STICK UP WITH LOCKING
COVER)
CAP AND SAMPLING PORI
"—PERFORATED PVC
RISER
CONCRETE 1-140
"-- BENTO °I TE PELLET SEAL
(HYDRATED PER MFG. SPECS)
GRWT SEAL
(CEMENT AND SODIUM BENTONITE)
SEDIMENT
SEASONAL HIGH WATER TABLE
13

NC Division of Waste Management - Solid Waste Section
Landfill Gas Monitoring Data Form
Notice: This form and any information attached to it are 'Public Records" as defined in NC General Statute 132-1. As such, these documents are
available for inspection and examination by any person upon request (NC General Statute 132-6).
Facility Name: Permit Number:
Sampling Date: NC Landfill Rule (.0500 or.1600):
Sample Collector Name & Position:
Gas Meter Type & Serial Number:
Field Calibration Date & Time:
Field Calibration Gas Type (15115 or 35/5
Gas Meter Pump Rate:
Gas Meter Calibration Date:
eld Calibration Gas Canister Expiration Date:
Ambient Air Temperature: Barometric Pressure (in. or mm Hg): Weather Conditions:
Instructions: Under "Location or LFG Well", list monitoring well # or describe monitoring location (e.g., inside field office).
Attach a test location map or drawing. Report methane readings as both % LEL and % CH4 by volume.
Convert % CH4 (by volume) to % LEL as follows: % methane (by volume)/20 = % LEL.
*Hydrogen Sulfide (H2S) gas monitoring may be required for Construction & Demolition Landfills (CDLFs). See
individual permit conditions and/or Facility LFG monitoring plan.
Location or
LFG Well ID
S ample
Tube
Purge
Time of
Day
Time
Pumped
(sec)
Initial
% LEL
Stabilized
% LEL
% CH4
( volume )
% 02
(volume)
% CO2
(volume)
% H2S*
(volume)
NOTES
NOTE: If needed, attach additional data forms to include additional LFG monitoring data locations for the facility.
ACTION LEVELS: Methane: >1.25% by volume (inside structures) AND >5% by volume (at facility boundary)
Hydrogen Sulfide: >1% by volume (inside structures) AND >4% by volume (at facility boundary)
Certification
To the best of my knowledge, the information reported and statements made on this data submittal and attachments
are true and correct. I am aware that there are significant penalties for making any false statement, representation,
or certification including the possibility of a fine and imprisonment.
SIGNATURE
TITLE
Revised — March 6, 2017

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