5001_Jackson_WCU_MSWLF_LFG_FID1321958_20190604

June 4, 2019
Mr. Roger Turk
Western Carolina University
3476 Old Cullowhee Road
Cullowhee, North Carolina 28723
Subject: Letter Report of Landfill Gas Monitoring
WCU Closed Municipal Solid Waste Landfill
Cullowhee, Jackson County, North Carolina
NCDEQ Permit: 50-01
Wood Project 6252-15-0221
Dear Mr. Turk:
wood.
Wood Environment & Infrastructure Solutions, Inc.
1308-C Patton Avenue
Asheville, INC 28806
USA
11[:i114:II►a M:11R11]
www.woodpic.com
Wood Environment & Infrastructure Solutions, Inc. (Wood) is pleased to present this Letter Report
of Landfill Gas Monitoring for Western Carolina University's (WCU's) closed municipal solid waste
landfill (MSWLF) located in Cullowhee, North Carolina (Figure 1). The scope of work for this
monitoring event was described in Wood's Addition of Scope Request for Environmental Services,
dated September 26, 2018. This letter report summarizes background information, field activities,
results, discussion and recommendations from landfill gas monitoring performed at the Site.
Background Information
WCU operated the MSWLF from approximately the 1960s until 1993. Jackson County also disposed
of municipal solid waste at the landfill from approximately the early 1970s through the early 1980s.
The landfill property is approximately 31.5 acres, approximately four acres of which contain the
former landfill. The landfill was closed in accordance with the then applicable North Carolina
Department of Environmental Quality (NCDEQ) closure standards (15A NCAC 13B 0.0510), and a
closure letter was issued to WCU by NCDEQ on September 5, 1995. NCDEQ personnel conducted a
facility audit on March 16, 2011, and determined that landfill gas monitoring at the landfill must be
performed in order for the landfill to be in compliance with the post -closure conditions identified in
the 1995 closure letter.
In response to the audit, a Landfill Gas Investigation Work Plan, which described the preliminary
landfill gas investigation, as well as the 'full' landfill gas investigation, was submitted to NCDEQ on
October 19, 2011, and approved by NCDEQ in a letter dated November 29, 2011. Wood conducted
the preliminary landfill gas investigation in January 2012 using the existing groundwater monitoring
wells, and then conducted semi-annual landfill gas monitoring utilizing the existing groundwater
North Carolina Corporate Engineering License No. F-1253, Geology No. C-247

Letter Report of Landfill Gas Monitoring June 4, 2079
WCU Closed Municipal Solid Waste Landfill, Cullowhee, North Carolina
Wood Project 6252-15-0227
monitoring wells from August 2012 to November 2015 to comply with the post -closure conditions.
The 'full' landfill gas investigation, which included the installation of eight permanent landfill gas
monitoring wells, was performed in February 2016. Since the 'full' landfill gas investigation has been
implemented, monitoring of landfill gas has been conducted quarterly in accordance with NCDEQ
Solid Waste Management rules (15A NCAC 13B.1626 (b)).
Field Activities
On May 14, 2019, Wood personnel measured landfill gas at the eight landfill gas monitoring wells
(LG-1, LG-2, LG-3S, LG-3D, LG-4, LG-5, LG-6 and LG-7) at the Site (Figure 2). The landfill gas
monitoring wells are screened in the unsaturated zone and located between the landfill and the
Site's property boundary. The landfill gas monitoring wells are fitted with a slip cap and ball valve to
allow for measurement of potential landfill gas. A calibrated gas monitoring instrument, a Landtec
GEM 2000+, was used to measure atmospheric pressure, as well as the following landfill gas
parameters:
Methane (percent by volume)
Oxygen (percent by volume)
Carbon dioxide (percent by volume)
The initial and stabilized readings for the above parameters were measured and recorded. The Solid
Waste Section's Landfill Gas Monitoring Data Form was used to record measurements and other
relevant information and is attached.
Results and Discussion
The Site landfill gas monitoring wells were tested for methane, carbon dioxide, and oxygen. Refer
to the attached Landfill Gas Monitoring Data Form for the testing results.
Concentrations of methane were not detected in the landfill gas monitoring wells. The regulatory
limit for methane at a MSWLF property boundary is equal to the lower explosive limit of methane
(15A NCAC 13B.1627 (d)). The recorded results from the eight landfill gas wells do not exceed this
limit indicating that regulatory limits are not being exceeded at the Site.
Recommendations
Based on the results of this monitoring event, we recommend submitting a copy of this letter
report to NCDEQ Solid Waste Section for their evaluation. We recommend continued quarterly
monitoring of landfill gas at the Site.
2

Letter Report of Landfill Gas Monitoring June 4, 2079
WCU Closed Municipal Solid Waste Landfill, Cullowhee, North Carolina
Wood Project 6252-75-0227
Closing
If you have any questions concerning these services, please do not hesitate to contact us at (828)
252-8130.
Sincerely,
Wood Environment & Infrastructure Solutions, Inc.
Rodney M. Clark, L.G. Susan E. Avritt, P.E., L.G.
Technical Professional
RMC/SEA:sea
Senior Engineer
attachments: Figure 1: Topographic Site Map
Figure 2: Landfill Gas and Monitoring Well Locations
Landfill Gas Data Monitoring Form
NCDEQ Environmental Monitoring Reporting Form

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SYLVA SOUTH, N.C. QUADRANGLE
35083—C2—TF-024
DMA 4354 1 SW —SERIES V842
N.C.
PRINTED 1946
PHOTOREMSED 1990
QUADRANGLE LOCATION
NOTE: SITE BOUNDARY IS APPROXIMATE.
CONTOUR INTERVAL 40 FEET
GRAPHIC SCALE FEET
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2,000 1,000 0 2,000
4,000
TOPOGRAPHIC SITE MAP
DRAWN: RMC
DATE: DEC. 2018
DFT CHECK: MEW
SCALE: 1" = 2,000'
WCU CLOSED MSWLF
ENG CHECK: --
JOB: 6252-15-0221
MONTEITH GAP ROAD
CULLOWHEE, NORTH CAROLINA
APPROVAL: MEW
FIG: 1

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GRAPHIC SCALE
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�i Property Boundary 50—foot Property Boundary Buffer
Landfill Extents MW-1 Monitoring Well
Unnamed Tributary/Stream L -G-1 Landfill Gas Well Location
1 INCH = 180 FT.
�i Elevation Contour (10—foot interval) NOTE: Locations of depicted features are approximate.
(approximate)
LANDFILL GAS AND MONITORING WELL LOCATIONS
WCU CLOSED MSWLF
wood.
CULLOWHEE, NORTH CAROLINA
DRAWN: RMC
ENG CHECK: --
DATE:
DECEMBER 2018
JOB: 6252-15-0221
DFT CHECK: MEW
APPROVAL: MEW
SCALE:
APPROX. 1" = 180'
FIG: 2
REFERENCE: JACKSON COUNTY GIS.

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 Stance 132-1. As such, these documents are
available for inspection and examination by any person upon request (NC General Statute 132-6).
Facility Name: UM - A4SW L Permit Number:
Sampling Date: 54 ( e4 It eq NC Landfill Rule (.0500 or .1600): 0 0
Sample Collector Name & Position: K&61aet At> ( �DltL 4 1,114pilTccd VreA2--,SYYesa j A
Gas Meter Type & Serial Number: tit m z000+ 6M 12- q4Ab Gas Meter Calibration Date:
Field Calibration Date & Time: / q • t-(G
Field Calibration Gas Type(15/15 or35/50): I 155 Field Calibration Gas Canister Expiration Date: (Z ( M2,
Gas Meter Pump Rate: O� 3 L/mf A . _
Ambient Air Temperature: c>t� Barometric Pressure (in. or man Hg): Z76(1 Weather Conditions:
, Instructions: Under "Location or LFG Well", list monitoring well # or describe monitoring location (e.g., inside field office).
Attach a test location man or drawine. Report methane readings as both % LEL and % CH4 by volume.
Convert % CH4 (by volume) to %LEL as follows: % methane (by volume)/20 = %LEL.
*Hydrogen Suede (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
Stabilised
%LEL
°/CHI
(volume)
%02
(volume)
%CO2
(volume)
%H2S*
(volume)
NOTES
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NOTE: Ifneeded, attach additional data forms to include additional LFG monitoring data locations for th ,jhcility.
ACTION LEVELS: Methane: >1.25%by volume (inside structures) AND >5% by volume (at facility boundary)
Hydrogen Sulfide: >I%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 ine mg t possibility fine and imprisonment..
SIGNATURE TITLE
Revised — March 6, 2017

ENR USE ONLY: ❑Paper Report [—]Electronic Data - Email CD data loaded: Yes 1 No Doc/Event#:
NC DENR Environmental Monitoring
Division of Waste Management - Solid Waste Reporting 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).
Instructions:
Prepare one form for each individually monitored unit.
Please type or print legibly.
Attach a notification table with values that attain or exceed NC 2L groundwater standards or NC 2B surface water standards. The notification
must include a preliminary analysis of the cause and significance of each value. (e.g. naturally occurring, off -site source, pre-existing
condition, etc.).
Attach a notification table of any groundwater or surface water values that equal or exceed the reporting limits.
Attach a notification table of any methane gas values that attain or exceed explosive gas levels. This includes any structures on or nearby the
facility (NCAC 13B .1629 (4)(a)(i).
Send the original signed and sealed form, any tables, and Electronic Data Deliverable to: Compliance Unit, NCDENR-DWM, Solid Waste
Section, 1646 Mail Service Center, Raleigh, NC 27699-1646.
Solid Waste Monitoring Data Submittal Information
Name of entity submitting data (laboratory, consultant, facility owner):
Wood Environment & Infrastructure Solutions, Inc.
Contact for questions about data formatting. Include data preparer's name, telephone number and E-mail address:
Name: Susan Avritt Phone: [phone]
E-mail: [e-mail]
NC Landfill Rule: Actual sampling dates (e.g.,
Facility name: Facility Address: Facility Permit # (.0500 or ,1600) October 20-24, 2006)
Western Carolina University Monteith Gap Road (State Road 1336) 50-01 0.0500 May 14, 2019
MSW Landfill Cullowhee, Jackson County, NC 28723
Environmental Status: (Check all that apply)
❑ Initial/Background Monitoring ❑X Detection Monitoring ❑
of data submitted: (Check all that apply)
Groundwater monitoring data from monitoring wells ❑X
Groundwater monitoring data from private water supply wells ❑
Leachate monitoring data
Surface water monitoring data ❑
Assessment Monitoring
Methane gas monitoring data
Corrective action data (specify)
Other(specify)
❑ Corrective Action
Notification attached?
❑ No. No groundwater or surface water standards were exceeded.
Yes, a notification of values exceeding a groundwater or surface water standard is attached. It includes a list of groundwater and surface water
monitoring points, dates, analytical values, NC 2L groundwater standard, NC 2B surface water standard or NC Solid Waste GWPS and
preliminary analysis of the cause and significance of any concentration.
❑ Yes, a notification of values exceeding an explosive methane gas limit is attached. It includes the methane monitoring points, dates, sample
values and explosive methane gas limits.
Certification
To the best of my knowledge, the information reported and statements made on this data submittal and attachments are true and correct.
Furthermore, I have attached complete notification of any sampling values meeting or exceeding groundwater standards or explosive gas
levels, and a preliminary analysis of the cause and significance of concentrations exceeding groundwater standards. I am aware that there
are significant penalties for making any false statement, representation, or certification including the possibility of a fine and imprisonment.
Susan Avritt, PE, LG Senior Engineer [phone]
Facility Representative Namp, (Print) , rlf, Title
1308 Patton Avenue, Asheville, NC 28806
Facility Representative Address
F-1253
NC PE Firm License Number (if applicable effective May 1, 2009)
(Area Code)Telephone Number
39@'�7 ap
Affix NC LiceQOZ?fP fekksiq hof geologist Seal
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Revised 612009