9226_ShotwellCDLF_December2023LFGMonitoringResults_FID1827775_20240202

3920 Arkwright Road, Suite 101 • Macon, Georgia 31210 • [phone] • Fax [phone] • www.hhnt.com
SAVANNAH • ATLANTA • Macon • STATESBORO • GREENVILLE, SC
Consulting Engineers
H. LOWRY TRIBBLE, JR., P.E.
WILLIAM F. HODGES, P.E.
W. MICHAEL STUBBS, P.E.
R. BRANT LANE, P.E.
CLINT L. COURSON, CHMM
K. MATTHEW CHEEK, P.E.
NATHAN D. DUNN, P.E.
RYAN S. WILLOUGHBY, P.E.
WILLIAM A. GRANICH, P.E.
ROBERT D. HELLER, CHMM
ERIC P. JACKSON, P.E.
DAVID E. BATTSON, P.E.
RYAN S. PETERS, P.E.
WILLIAM M. REESE, P.E.
CLAUDIA M. MOELLER, P.E.
TIMOTHY D. BAUMGARTNER, P.E.
DANIEL E. CHEEK, P.E.
KEVIN G. BERRY, P.E.

February 1, 2024

Mr. Ervin Lane
Hydrologist
North Carolina Department of Environmental Quality
Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Re: Shotwell C&D Landfill
Methane Monitoring Update
Permit No. 9226-CDLF-2020
HHNT Project No. 5025-045-04

Dear Mr. Lane:

On behalf of Meridian Waste, Hodges, Harbin, Newberry & Tribble, Inc. (HHNT) is providing an update for the
subject facility regarding the methane exceedance observed at LG-8R in November 2023 and proposed remedial
measures outlined in the Methane Exceedance Notice – Q4 2023 Landfill Gas Monitoring letter, dated December
6, 2023 (FID 1822935). The proposed remedial measures were approved by NCDEQ in an email dated December
18, 2023 (FID 1822936).

Monthly landfill gas monitoring for the exceeding probe, LG-8R, and the two off-site structures in the vicinity of
the exceeding probe commenced in December 2023. Results from the December 2023 event are enclosed with
this letter and indicate no methane gas was detected at any of the monitored locations.

In January 2024, the proposed modifications to the landfill gas monitoring system were completed, consisting of
the abandonment of LG-8R and installation of replacement probe LG-8R2 closer to the property boundary.
Additionally, three new methane monitoring probes were installed at the property boundary consisting of points
LG-12, LG-13, and LG-14. Groundwater monitoring well MW-1A was also abandoned and replacement well
MW-1AR was installed as part of these activities. A Report of Groundwater and Methane Monitoring Well
Abandonment and Installation, dated February 1, 2024 and prepared by Bunnell-Lammons Engineering, Inc. is
enclosed with this letter that documents the abandonment and installation of the stated monitoring points.

The January 2024 monthly landfill gas monitoring event was conducted on January 18, 2024, and included
monitoring of the newly installed methane locations, LG-8R2, LG-12, LG-13, and LG-14, and the two off-site
structures. Results from the January 2024 event are enclosed with this letter and indicate no methane gas was
detected at any of the monitored locations. The next monitoring event will occur in February 2024 and will
coincide with the 1st Quarter 2024 landfill gas monitoring event for the entire perimeter network.

Should you have any questions, please call.

Mr. Ervin Lane
February 1, 2024
Page 2 of 2
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Sincerely,

HODGES, HARBIN, NEWBERRY & TRIBBLE, INC.

W. Michael Stubbs, P.E.
Principal

WMS/mf

Enclosure

cc: Wally Hall, Jr., Meridian Waste (w/ electronic enclosure)
Murray Long, Meridian Waste (w/ electronic enclosure)
Cooper Tharp, Meridian Waste (w/ electronic enclosure)
Dave Sanders, CHMM, HHNT (w/ electronic enclosure)
William Putnal, HHNT (w/ electronic enclosure)
Zach Downes, P.G., BLE (w/ electronic enclosure)
Andy Alexander, P.G., BLE (w/ electronic enclosure)