4103_WhiteStreetCDLF_LFGmonitoringPlan _DIN27971_20171107

City of Greensboro | White Street C&D Landfill – Permit Amendment Appendix G – Landfill Gas Monitoring Plan

G
Appendix G – Landfill Gas
Monitoring Plan

Golder Associates NC, Inc. 5B Oak Branch Drive Greensboro, NC 27407 USA Tel: [phone] Fax: [phone] www.golder.com Engineering Lic. No. C-2862/Geology Lic. No. C-399
Golder, Golder Associates and the GA globe design are trademarks of Golder Associates Corporation
November 7, 2017 1668421.200
Mr. Perry Sugg, PG, Permitting Hydrogeologist
Department of Environmental Quality Division of Waste Management - Solid Waste Section
1646 Mail Service Center Raleigh, NC 27699-1646
[phone] [e-mail]
RE: PHASE I AND II WATER QUALITY MONITORING PLAN UPDATED ATTACHMENTS WHITE STREET LANDFILL - PHASE II, PERMIT NO. 41-03 GREENSBORO, NORTH CAROLINA
Dear Mr. Sugg,
On behalf of the City of Greensboro, Golder Associates NC, Inc. (Golder) is submitting the enclosed updates to the Water Quality Monitoring Plan for the Phase I and Phase II waste units at the White Street Landfill.
These updates are in response to an email from Perry Sugg of the North Carolina (NC) Department of Environmental Quality (DEQ) Division of Waste Management - Solid Waste Section to Michael Plummer of
HDR, Inc., dated June 19, 2017.
The June 19, 2017, email stated that upon a final review of the Water Quality Monitoring Plan and Landfill
Gas Monitoring Plan submitted with the revised May 2017 application for the Phase II C&D Landfill, the following comments are to be addressed before approving:
Landfill Gas Monitoring Plan
 Add the Landfill Gas Monitoring Data form (revised – March 6, 2017), which is to be filled
out for each landfill gas monitoring event.
Water Quality Monitoring Plan
 In Appendix I, Table 1A should be revised by removing the word “proposed” from the title
 In Appendix I, Table 1B should be revised by removing the word “proposed” from the title
 In Appendix I, Table 1B should be revised by replacing groundwater monitoring well II-4 with II-4A
 In Appendix I, Table 1B should be revised by adding groundwater monitoring well II-7B
 In Appendix I, Table 1B should be revised by adding surface water monitoring point SW-1
 In Appendix I, Table 1B should be revised by adding a note that indicates that surface water monitoring points SW-1, SW-2, SW-3, SW-4, and SW-5 serve as part of the
monitoring program for both the Phase I and Phase II landfills
 In Appendix II, Figure 1 should be replaced with a better and clearer map that shows the
current Phase I and Phase II groundwater monitoring network
 In Appendix II, Figure 2 should be replaced with a better and clearer map that shows all of
the surface water monitoring points
 In Appendix II, add a site facility map that shows all of the solid waste units
In response to these comments, the Landfill Gas Monitoring Data form will be used for quarterly boundary migration monitoring, which will continue to be performed as directed in Section 4.3.3 of the Landfill Gas
Revised – March 6, 2017
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: Gas Meter Calibration Date:

Field Calibration Date & Time:

Field Calibration Gas Type (15/15 or 35/50): Field Calibration Gas Canister Expiration Date:

Gas Meter Pump Rate:

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
Sample
Tube
Purge

Time of Day
Time
Pumped
(sec)
Initial % LEL Stabilized % LEL % CH4 (volume)
% O2 (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

Landfill Gas
Monitoring Plan
White Street C&D Landfill
Permit Renewal
Greensboro, North Carolina
May 2017

HDR Engineering, Inc. of the Carolinas 440 S Church Street, Suite 1000, Charlotte, NC 28202-2075 704.338.6700
NC License F0116

City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Contents
Contents
Contents ......................................................................................................................................... i
1.0 Introduction ........................................................................................................................ 1
2.0 Background Information ..................................................................................................... 1
2.1 General ........................................................................................................................... 1
3.0 Landfill Gas Overview & Regulatory Action Levels ............................................................ 1
4.0 Landfill Gas Monitoring ...................................................................................................... 3
4.1 Proposed Landfill Gas Monitoring Procedure ................................................................. 3
4.2 Schedule for Installation of Monitoring Elements ........................................................... 6
4.3 Maintenance and Calibration of Monitoring Elements .................................................... 6
5.0 Contingency Plan ............................................................................................................... 7
5.1 Contingency Plan Guidelines ......................................................................................... 7
5.2 Contingency Plan - On-site Structures ........................................................................... 8
5.3 Contingency Plan - Facility Property Boundary .............................................................. 9
6.0 Safety ............................................................................................................................... 10

Tables
Table 1 Compliance Levels for Methane ...................................................................................... 2
Table 2 Compliance Levels for Hydrogen Sulfide ......................................................................... 2
Table 3 Contingency Plan Contacts .............................................................................................. 8

Figures
Figure 1 Drawing CD-79B Gas Monitoring Wells .......................................................................... 4
Figure 2 Typical Methane Probe Construction .............................................................................. 5

Attachments
Attachment 1 – Field Data Form

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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Introduction
1.0 Introduction
The purpose of this Landfill Gas Monitoring Plan (LGMP) is to provide a management practice
for the monitoring and control of landfill gas generated by the White Street Construction and
Demolition Debris (C&D) Landfill.
Following approval of this LGMP by the North Carolina Department of Environmental Quality
(NCDEQ) Division of Waste Management (DWM), a routine methane monitoring program will be
implemented at the landfill. Once final closure of the unit is complete, the monitoring program
will continue in accordance with NC regulation, 15A NCAC 13B .0543 (e)(1)(C). Following
approval, this plan will be placed in the landfill operating record and shall remain open for
revisions throughout the active life of the landfill, as well as after landfill closure is complete. All
changes to this plan will be submitted to NCDEQ DWM as they are implemented.
2.0 Background Information
2.1 General
The White Street Landfill is located off White Street approximately five miles northwest of the
City of Greensboro, North Carolina (the City) and is operated under North Carolina NCDEQ
DWM Permit No. 4103-CDLF-1998. The facility consists of three major units: the closed Phase I
unit, the active Phase II C&D unit, which is on top of the closed Phase II MSW unit, and the
Phase III MSW unit which is currently active. The closed Phase II MSW unit is unlined and is
approximately 135 acres. The Phase II C&D landfill area occupies approximately 90 acres.
Land use to the east and north of the Phase II C&D landfill is primarily residential along with
some light industrial use along Rankin Mill Road. To the west is the closed Phase I landfill, and
to the south is the active Phase III MSW landfill.
3.0 Landfill Gas Overview & Regulatory Action
Levels
One of the byproducts of landfilling municipal solid waste is landfill gas which is generated by
the anaerobic decomposition of waste within the landfill. Landfill gas typically consists of
methane (CH4) and carbon dioxide (CO2), with trace amounts of oxygen (O2), water (H2O),
nitrogen (N2), hydrogen sulfide (H2S), and other gases. The amount and rate of generation of
landfill gas is affected by several factors, including the following.
• Total refuse tonnage in-place.
• Moisture content of the refuse.
• Age of the refuse.
• Organic composition and pH value of the refuse.
• Method and degree of compaction of the refuse.
• Type and amount of cover material used.
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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Landfill Gas Overview & Regulatory Action Levels
The concentration of the landfill gas varies according to site-specific conditions; however, landfill
gas compositions of 30-53 percent methane (CH4) and 34-51 percent carbon dioxide (CO2) are
common.
A byproduct of landfilling C&D waste is hydrogen sulfide gas which is generated by the
anaerobic decomposition of waste within the landfill. The higher concentrations of hydrogen
sulfide are believed to be associated with the gypsum board component (e.g. wallboard) present
in C&D material. The combination of gypsum, organic material, moisture and anaerobic
conditions present in C&D landfills is believed to provide a favorable mixture and environment
for bacteria to produce hydrogen sulfide gas.
C&D landfill owners and operators must insure that the concentration of methane gas or other
explosive gases generated by the facility does not exceed 25 percent of the lower explosive limit
at the facility boundary, in on-site facility structures (excluding gas control or recovery system
components) and the facility does not release methane gas or other explosive gases in any
concentration that can be detected in offsite structures per 15A NCAC 13B .0544 (d).
Landfill gas can travel in all directions, taking the path of least resistance. Landfill gas moves
from areas of higher concentrations to areas of lower concentrations (diffusion), or from higher
gas pressure zones to lower gas pressure zones (convection). Subsurface geologic and
hydrogeologic conditions contribute greatly to the potential for gas migration. When landfill gas
migration is taking place, on-site and nearby structures are at risk of receiving migrating gas due
to confined spaces in or under the buildings. Landfill gas can enter buildings through cracks in
the foundation or subsurface utility services. Lack of ventilation may result in the buildup of
methane concentrations to explosive limits.
In an effort to eliminate the potential hazards associated with the migration of landfill gas,
NCDEQ has promulgated regulations (15A NCAC 13B .0544 (d)(2)) , which require owners
and/or operators of all C&D landfill facilities to monitor gases at the facility property boundary
and on-site structures. Tables 1 and 2 below provide the present regulatory limits for methane
and hydrogen sulfide at C&D sites.
Table 1 Compliance Levels for Methane
Location Lower Explosive Limit (% LEL) Maximum Methane Concentration in Air
Property Boundary 100% 5% Facility Structures 25% 1.25%

Table 2 Compliance Levels for Hydrogen Sulfide
Location Lower Explosive Limit (% LEL) Maximum Hydrogen Sulfide Concentration in Air
Property Boundary 100% 4% Facility Structures 25% 1.00%

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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Landfill Gas Monitoring
4.0 Landfill Gas Monitoring
4.1 Proposed Landfill Gas Monitoring Procedure
To provide a means of monitoring methane gas at the landfill, permanent gas migration
monitoring stations have been installed along the perimeter of the Phase II active and closed
landfill areas. These stations are monitored on a quarterly basis.
4.1.1 Permanent Monitoring Station Design and Installation
Permanent monitoring stations have been installed around the active and closed landfill. All the
wells are for detection monitoring. Drawing CD-79B Phase II Landfill Gas Monitoring System,
shows the monitoring wells at the landfill.
4.1.1.1 ACTIVE LANDFILL EXISTING STATIONS
Eight permanent monitoring stations (MGMW-1 through MGM-8) have been installed along the
permit boundary for Phase II (see Drawing CD-79B). The well locations were placed on the east
side of Phase II between the permitted waste boundary and property lines along Rankin Mill
Road. No wells are shown between the active landfill and Buffalo Creek since this is interior to
the property line and Buffalo Creek acts as a cut-off feature.

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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Landfill Gas Monitoring

Figure 2 Typical Methane Probe Construction
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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Landfill Gas Monitoring
4.1.2 Gas Migration Monitoring
Reading of the permanent monitoring stations and on site structures will be conducted on a
quarterly schedule. As per existing regulations, the monitoring frequency of individual stations
may be increased if combustible gas is detected above the LEL. Sampling procedure will follow
the manufacturer’s instructions.
All perimeter gas stations shall be monitored for the following parameters.
• Combustible Gas (methane) - with a Landtec GEM 5000 (or equivalent).The station shall
be sufficiently evacuated with the sample pump so that methane concentrations are
constant for at least 30 seconds. The large scale (0-100 percent methane-in-air) shall be
used first. If readings are below 5 percent, the reading will be obtained using the smaller
(0-5 percent methane-in-air) scale.
• Combustible Gas (hydrogen sulfide) - with a Landtec GEM 5000 (or equivalent).The
station shall be sufficiently evacuated with the sample pump so that hydrogen sulfide
concentrations are constant for at least 30 seconds. The large scale (0-100 percent
hydrogen sulfide-in-air) shall be used first. If readings are below 4 percent, the reading
will be obtained using the smaller (0-4 percent hydrogen sulfide-in-air) scale.
Information from the monitoring will be recorded on the field data form (Appendix 1). Any
readings recorded at or above the LEL for methane will be immediately verified and reported as
described in the Contingency Section of this plan.
4.1.3 Continuous Monitoring of On-Site Structures
Select on-site buildings will be equipped with continuous monitoring device to detect
combustible gas concentrations that may accumulate inside the structures.
The device should be rated to detect a wide range of combustible gases and have a methane
detection range of 500 to 10,000 parts per million (ppm) (.05 to 1.0 percent methane-in-air). The
monitor should be installed in an area of the structure where methane gas is most likely to
accumulate. Any verifiable detection of methane in the structures will be addressed and
reported in accordance with the Contingency Section of this LGMP.
4.2 Schedule for Installation of Monitoring Elements
When the City determines that additional permanent monitoring stations are needed, this station
will be installed and documentation will be submitted to the NCDEQ DWM after installation.
4.3 Maintenance and Calibration of Monitoring Elements
The City conducts the following maintenance schedule and calibration procedures for the gas
monitoring elements at the landfill. Training of personnel is conducted when necessary.
4.3.1 Maintenance of Permanent Monitoring Stations
A visual inspection of the permanent stations will be conducted quarterly in conjunction with the
monitoring events. The inspection schedule will increase with any increases in the monitoring
schedule. The condition of following elements will be inspected.
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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Contingency Plan
• Station label.
• Protective casing and concrete pad.
• Lock.
• Station surroundings including standing water and vegetation.
Any abnormalities regarding the condition of the station will be noted on the field log and
immediately addressed.
4.3.2 Calibration of Portable Monitoring Instruments
4.3.2.1 CONTINUOUS MONITORING DEVICES
Continuous monitoring devices will be maintained and calibrated according to the
manufacturers’ recommendations. Maintenance and calibration will include the following tasks.
• Verification of power to the monitor.
• Ensuring that there is no interference of air flow to the monitor.
• Exposing the sensor to a sample of calibration gas per the manufacturer's recommended
procedure to verify that the monitor is calibrated correctly.
4.3.2.2 PORTABLE MONITORING INSTRUMENTS
Portable monitoring instruments such as the Landtec GEM 2000 will be maintained and
calibrated according to the manufacturer's recommended procedure. For a detailed description
of the maintenance and calibration procedures, the instruction manual should be consulted.
5.0 Contingency Plan
The City will implement the following contingency plan if the landfill gas readings at any
monitoring location exceed the limits set by regulations (see Table 1 – Compliance Levels of
Methane in this plan).
5.1 Contingency Plan Guidelines
If allowable maximum limits for combustible gas are exceeded at the facility property boundary
or in on-site structures, the City will take the following steps.
Step 1: Immediately take all necessary steps to ensure protection of human health and notify
NCDEQ.
Step 2: Within seven days of detection, place the combustible gas levels detected and a
description of the steps taken to protect human health in the operating record.
Step 3: Within 60 days of detection, develop and implement a remediation plan that describes
the nature and extent of the problem and proposed remedy for the combustible gas releases,
place a copy of the plan in the operating record and notify NCDEQ that the plan has been
implemented.
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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Contingency Plan
Consistent with the above requirements, notifications will be made either in person or by
telephone followed by a facsimile transmission or letter. The City will also contact the following
agencies or personnel as necessary.
Table 3 Contingency Plan Contacts
Agency or Personnel Contact Telephone Number
City of Greensboro Solid Waste Administrator 336-373-2783
City of Greensboro Solid Waste Engineer 336-373-4118 City of Greensboro Landfill Manager 336-373-7658
NCDEQ – Emergency Notification Environmental Specialist 336-771-5000 Fire Department -- 336-373-2356

5.2 Contingency Plan - On-site Structures
The following contingency plan for responding to the detection of excessive combustible gas
quantities detected in all onsite buildings will be implemented by the City.
5.2.1 Immediate Action
• The affected building(s) would be vacated for a period of time determined by the
appropriate emergency officials and all necessary steps will be taken to ensure
protection of human health.
• The landfill operations superintendent, the occupants of the building(s), and the
personnel listed in Table 2 Contingency Plan Contacts will be contacted.
• Notify NCDEQ.
• Following the evacuation, the building(s) will be monitored by City personnel to
determine the extent and source of the methane. Remedial actions such as sealing
cracks or connections would be taken as necessary.
5.2.2 Action within 7 Days
The landfill staff will prepare and place in the operating record a brief report to include, at a
minimum, the following information.
• Results of original and any additional monitoring.
• Summary of actions taken included in Immediate Action section of this LGMP.
5.2.3 Action within 60 Days
5.2.3.1 PREPARE A REMEDIATION PLAN
A remediation plan will be prepared to address at least the following issues.
• Nature and extent of the problem.
• Proposed long term remedial action(s).
5.2.3.2 IMPLEMENTATION OF THE PLAN
NCDEQ will be notified that the Plan has been implemented.
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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Contingency Plan
5.3 Contingency Plan - Facility Property Boundary
The City's proposed contingency plan for responding to excessive methane gas quantities at the
facility property boundary is provided below.
5.3.1 Immediate Action
• Landfill personnel will be directed away from the affected area and all necessary steps
will be taken to ensure protection of human health.
• The affected area will be monitored daily for a period of time to confirm the methane
concentration.
• If monitoring reports are positive, areas adjacent to the affected zone (including the
property line, utility trenches, and off-site buildings and structures) shall be monitored or
screened by designated personnel.
• If the combustible gas quantities exceed the LEL at the facility boundary, the landfill
manager and the personnel listed in Table 2 Contingency Plan Contacts of this plan,
may be contacted.
• Notify NCDEQ.
5.3.2 Action within 7 Days
The landfill manager will prepare and place in the operating record a brief report to include, at a
minimum, the following information.
• Results of original and any additional monitoring.
• Summary of actions taken included in Immediate Action section of this LGMP.
5.3.3 Action within 60 Days
5.3.3.1 PREPARE A REMEDIATION PLAN
A remediation plan will be prepared to address at least the following issues.
• Nature and extent of the problem.
• Proposed long-term remedial action(s) such as installation of passive or active gas
control system.
A copy of the LGMP will also be placed in the landfill operating record for the facility. NCDEQ
will be notified that the remediation plan has been implemented.
5.3.3.2 BAR-HOLE PROBE INSTALLATION AND MONITORING PROCEDURE
Bar-hole probes may be temporarily installed as a remediation plan and monitored along the
perimeter boundary of the landfill. Bar-hole probes may be used for identifying and tracking
methane migration plumes, as described in the Contingency Plan section, and as a substitute
monitoring method for damaged or malfunctioning permanent probes.
Prior to conducting bar-hole probing, the area will be checked for any subsurface utilities,
conduits, or pipelines. If water or mud covers the desired probe location, then the probe will be
offset to a nearby dry portion of the permit boundary or temporarily eliminated from the
monitoring round. All precautions shall be taken to eliminate the introduction of moisture into the
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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Safety
monitoring instrument. Any abnormalities in the probe location will be noted on the field data
form (refer to Appendix 1).
The bar-hole procedure will involve pushing a 1/2-to 3/4-inch diameter metal rod a minimum of
2-3 feet into the subsurface soils. Upon removal of the metal rod, a probe connected to Landtec
GEM 5000 or equivalent will be immediately inserted into the hole and sealed to minimize air
infiltration into the sample. A measurement of the sample, along with other pertinent data, will
be taken and recorded on the field data form located in Appendix 1. Readings from the probe
hole will be taken first with the instrument in the “HIGH” or 0-100 percent methane-in-air range.
If a reading above 5 percent cannot be maintained during evacuation for at least 30 seconds,
then the measurement shall be repeated with the instrument in the “LOW” or 0-5 percent
methane-in-air (0-100 percent of the LEL) range. Upon completion of the monitoring, the probe
hole will be backfilled with native soil.
If concentrations of combustible are measured at or above the LEL, additional bar-hole probes
will be installed to assess the lateral extent of the migration. The additional probes will be placed
in a radial pattern starting at the initial probe location and working in 5-foot increments outward.
The pattern will continue until readings of 0 percent combustible are obtained. Information from
this monitoring procedure will be recorded on graph paper to determine the extent of the
migration. The information will be submitted to NCDEQ in the Semiannual Ground-Water
Monitoring Report. If it is determined that off-site migration exists above the LEL, the
information, along with any proposed mitigation measures, will be submitted in accordance with
the Contingency Plan section of this LGMP.
The bar-hole probe equipment will be maintained between monitoring events. Maintenance
associated with the bar-hole probe monitoring includes ensuring plunger bar is clean and free of
damage.
5.3.3.3 IMPLEMENTATION OF THE PLAN
NCDEQ will be notified that the remediation plan has been implemented.
6.0 Safety
Prior to beginning a monitoring procedure, the landfill technician must understand the potential
dangers associated with landfill gas. Not only is landfill gas explosive, it can also present the
following other hazards.
• Landfill gas may cause asphyxiation through oxygen displacement. Proper procedures
must be followed when entering confined spaces which may be potential receptors of
migrating landfill gas.
• Some of the possible trace contaminants associated with landfill gas, such as hydrogen
sulfide (H2S), are extremely toxic. Technicians must be trained in the indicators of H2S
such as its recognizable odor (rotten egg) at low concentrations.
At a minimum, the following items should be addressed by the technician, in addition to any site-
specific safety procedures to reduce the chance of injury.
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City of Greensboro | White Street C&D Landfill – Landfill Gas Monitoring Plan Safety
• Be aware of the hazards of landfill gas as mentioned above.
• Practice confined space entry procedures when entering structures that have been
evacuated due to the possible presence of landfill gas in confined space.
• Always practice the “buddy” system (i.e., work with a partner who remains outside of the
area of possible exposure) when monitoring for landfill gas.
• Know where all firefighting equipment (i.e., extinguishers, hoses, etc.) is stored and
ensure that it is well maintained.
• Determine whether additional personal safety equipment is necessary.
• Do not smoke or allow others nearby to smoke while monitoring for landfill gas, or at any
time when near landfill waste.
• Know how the monitoring instruments work and how to operate and calibrate them
properly.
• Determine where all nearby subsurface utilities are prior to bar-hole probing.
• Do not use odor as a primary indicator of landfill gas migration.
• Inform the landfill manager or your supervisor of any possible hazards, no matter how
small they may appear.

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City of Greensboro | White Street Landfill – Landfill Gas Monitoring Plan Attachment 1 – Field Data Form

1
Attachment 1 – Field Data
Form

White Street Landfill Gas Migration Report
Quarter Year

Monitoring Well Methane % H2S Time Date
MGMW-1
MGMW-2
MGMW-3
MGMW-4
MGMW-5
MGMW-6
MGMW-7
MGMW-8

Building Location Methane % H2S Time Date
Phase II Blower
Landfill Maintenance

Shop Area
Restroom
Offices
Landfill Scalehouse
Weighmaster Area
Hallway
Conference Room
Offices
Yardwaste Building

Readings taken by:
Signature:

Revised – March 6, 2017
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: Gas Meter Calibration Date:

Field Calibration Date & Time:

Field Calibration Gas Type (15/15 or 35/50): Field Calibration Gas Canister Expiration Date:

Gas Meter Pump Rate:

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
Sample
Tube
Purge

Time of
Day
Time
Pumped
(sec)
Initial
% LEL
Stabilized
% LEL
% CH4
(volume)

% O2
(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