5001_Jackson_WCU_MSWLF_Dec2020LFG_FID1526077_20200122

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Wood Environment & Infrastructure Solutions, Inc.
1308-C Patton Avenue
Asheville, NC 28806
USA
January 21, 2021
www.woodpic.com
Mr. Roger Turk
Western Carolina University
3476 Old Cullowhee Road
Cullowhee, North Carolina 28723
Subject: Letter Report of December 2020 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 Environment & Infrastructure Solutions, Inc. (Wood) is pleased to present this Letter Report
of December 2020 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 Proposal for Environmental Services, dated
May 26, 2020. 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 existing groundwater monitoring
North Carolina Corporate Engineering License No. F-1253, Geology No. C-247 0

Letter Report of Landfill Gas Monitoring January 27, 2027
WCU Closed Municipal Solid Waste Landfill, Cullowhee, North Carolina
Wood Project 6252-15-0227
wells, and then conducted semi-annual landfill gas monitoring utilizing the existing groundwater
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 December 21, 2020, 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 5000+, 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 January 27, 2027
WCU Closed Municipal Solid Waste Landfill, Cullowhee, North Carolina
Wood Project 6252-15-0227
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.
Akk) t - wfiau""
Rodney M. Clark, L.G. Matthew E. Wallace, P.E
Technical Professional Principal Engineer
RMC/MEW:rmc
attachments: Figure 1: Topographic Site Map
Figure 2: Landfill Gas and Monitoring Well Locations
Landfill Gas Data Monitoring Form
NCDEQ Environmental Monitoring Reporting Form
3

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SYLVA SOUTH, N.C. QUADRANGLE
35083-C2-TF-024 N.C.
DMA 4354 1 SW -SERIES V842
PRINTED 1946
PHOTOREVISED 1990 QUADRANGLE LOCATION
NOTE: SITE BOUNDARY IS APPROXIMATE.
CONTOUR INTERVAL 40 FEET
GRAPHIC SCALE FEET wood
2,000 1,000 0 2,000 4,000
TOPOGRAPHIC SITE MAP
DRAWN: RMC
DATE: FEB. 2020
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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Signature Date
1308 Patton Avenue, Asheville, NC 28806
Facility Representative Address
F-1253
NC PE Firm License Number (if applicable effective May 1, 2009)
Revised 612009
ENR USE ONLY: [:]Paper Report ❑Electronic Data - Email CD data loaded: Yes 1 No Doc/Event #:
NC DENR I IEnvironmental Monitoring
Division of Waste Management - Solid Waste Reporting Form
Notice: This form and any information attached to it are "Public Records" as defined in NO General Statute 132-1. As such, these documents are
available for inspection and examination by any person upon request (NC General Statute f 32-6).
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 NO 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, NO 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: Rodney Clark Phone: [phone]
E-mail: [e-mail]
NO 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 December 21, 2020
MSW Landfill Cullowhee, Jackson County, NC 28723
Environmental Status. (Check all that apply)
InitiallBackground Monitoring [X Detection Monitoring Assessment Monitoring Corrective Action
of data submitted: (Check all that apply)
Groundwater monitoring data from monitoring wells
Groundwater monitoring data from private water supply wells El
Leachate monitoring data El
water monitoring data
Methane gas monitoring data
Corrective action data (specify)
Other(specify)
Notification attached?
e 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, NO 2B surface water standard or NO Solid Waste GWPS and
preliminary analysis of the cause and significance of any concentration.
El 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.
Rodney Clark, LG Technical Professional II [phone]
Name (Print) / T'tle (Area Code) Telephone Number
� 2�/20�� Affix NC Licensed! Prof@ssionpi Geologist Seal
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