1201_BurkeCountyKirseyDrive_LFGLandfillGasRemediationPlan_DIN26882_20160721

2211 W. Meadowview Road Boone Building, Suite 101 Greensboro, NC 27407 tel: [phone] fax: [phone] www.JoyceEngineering.com
July 21, 2016

Jaclynne Drummond
Compliance Hydrogeologist
Solid Waste Section, Division of Waste Management
1646 Mail Service Center Raleigh, NC 27699-1646

RE: Landfill Gas Remediation Report
Kirksey Drive Landfill (Permit #12-01) Burke County, North Carolina

Dear Ms. Drummond:
Joyce Engineering has prepared this letter report for the Landfill Gas Remediation
(LFGR) of the Burke County Kirksey Drive Closed Landfill (Permit #12-01) in accordance with North Carolina Solid Waste Management Regulations (NCSWMR) 15A NCAC 13B and the
facility’s Landfill Gas Monitoring Plan (LFGMP). This LFGR report is presented in fulfillment
of Landfill Gas Remediation Plan approved by the North Carolina Department of Environmental
Quality (NCDEQ), Solid Waste Section (SWS) on August 13, 2015 for the closed Kirksey Drive
landfill.
BACKGROUND INFORMATION
The Kirksey Drive Sanitary Landfill, Permit No. 12-01 is a closed, unlined municipal
solid waste (MSW) landfill located approximately two miles northwest of downtown Morganton,
North Carolina. The facility operated as Burke County’s Landfill between 1968 and 1985 and
has been closed to waste disposal since 1985.
The landfill is regulated under Rules .0500 and .0600 of the NCSWMR for municipal solid
waste landfills (MSWLF) closed prior to October 9, 1993.
GAS MONITORING NETWORK AT KIRKSEY DRIVE LANDFILL
Gas-monitoring probes GP-1 and GP-2 were installed at the Kirksey Drive Landfill in
June 2001. In the approved LFGMP (JOYCE, 2012), four additional probes were proposed. Two of four proposed probes, GP-3 and GP-4, were installed in March 2015 and the remaining
two probes, GP-5 and GP-6, were installed in June 2015. The locations of the gas probes are
shown on Drawing 1 and boring logs for the six gas probes are attached.
Mr. Jaclynne Drummond
July 21, 2016
Page 2 of 3

METHANE EXCEEDANCES
Quarterly monitoring of gas probes GP-1 and GP-2 has shown no exceedances for
methane since they were installed in 2001. GP-3 and GP-4 were monitored for the first time as part of the first quarterly monitoring event on March 30, 2015. Methane concentrations in
exceedance of the lower explosive limit (LEL) for methane were detected in both GP-3 and GP-4
during the first, second, and third quarter monitoring events of 2015. GP-5 and GP-6 were
monitored for the first time as part of the third quarterly monitoring event conducted on July 16,
2015. Methane in exceedance of the LEL was detected in GP-6, but not in GP-5. Landfill gas monitoring conducted in February and May of 2016 detected methane exceedance of the LEL in
GP-3, GP-4, and GP-6. The monitored exceedances of methane concentrations fluctuate slightly
from quarterly event to another not showing particular increase or decrease in the methane
concentrations.
LANDFILL GAS REMEDIATION PLAN
Burke County proposed plans for controlling the migration of landfill gas from the
Kirksey Drive Landfill. The SWS approved the Landfill Gas Remediation Plans in August 13,
2015. The LFGRP included landfill gas vents to be installed at Kirksey Drive landfill. The
County installed four passive gas vents in the waste at the Kirksey Drive on May 18, 2016. The
installed vent and probe locations are shown on Drawing 1. The vents were located approximately 50-100 feet inside the edge of waste. Borings for the vents were advanced
through the waste until native soil was reached. The gas vents were installed using a bucket
auger rig with a 36 inch boring diameter. Waste removed from the borings was collected in roll-
off boxes, and transported to the transfer station at the John’s River facility for disposal.
The gas vents were constructed of 6-inch diameter, schedule 80 PVC perforated screen and solid riser. The screen was installed from the total boring depth to approximately 5 feet
below grade, with riser pipe extending from five feet below grade to approximately five feet
above grade. The annular space was filled with #57 stone from the total depth to two feet above
the screen. A two-foot thick bentonite seal was placed in the annular space above the gravel.
The remaining annular space was backfilled with soil to ground surface and compacted. The vents were completed with solar-powered turbine vent caps. A photo of one of the gas vents is
attached.
MONITORING AND FURTHER ACTION
Quarterly landfill gas monitoring will continue at the site. After one year of gas
monitoring (four quarterly events) following installation of the vents, the County will make an assessment regarding the effectiveness of the passive vents.

PASSIVE GAS VENT BORING LOGS

LANDFILL GAS PROBE BORING LOGS

LANDFILL GAS VENT (PHOTO)

Passive Landfill Gas Vent (typical) at East Burke and Kirksey Drive Closed Landfills.

DRAWINGS