3404_Forsyth_Kernersville_MSWLF_LFGRequest_FID1830425_20240216

■■ WithersRavenel
VoOur People. Your Success.
February 16, 2024
Ms. Jaclynne Drummond
Compliance Hydrogeologist
NC Department of Environment and Natural Resources
Division of Waste Management -Solid Waste Section
2090 US Highway 70
Swannanoa, NC 28778
Reference: Landfill Gas Monitoring Reduction Request
Town of Kernersville Landfill, Permit No. 34-04
Forsyth County, North Carolina
WR Project No. 23-0402-002
Dear Ms. Drummond:
WithersRavenel, Inc. (WR) has prepared this Landfill Gas Monitoring Reduction Request on behalf of
the Town of Kernersville to request a reduction in occurrence of landfill gas monitoring at the
Town of Kernersville Closed Landfill, Permit No. 34-04.
Should you have any questions regarding the attached, please do not hesitate to contact us at
[phone].
Sincerely,
WithersRavenel
�(J
Matilynn Itba, P.G.
Environmental Geologist II
Flora D'Souza, CHMM
Environmental Scientist II
115 MacKenan Drive I Cary, NC 27511
t: 919.469.3340 1 f: 919.467.6008 1 www.withersravenel.com I License No. F-1479
Cary I Greensboro I Pittsboro I Raleigh I Wilmington I Asheville I Southern Pines

::WithersRavenel
Our People. Your Success.
BACKGROUND
The Town of Kernersville Landfill (Site) is a closed, unlined municipal solid waste landfill located on
approximately 58.2 acres in Forsyth and Guilford Counties, NC, approximately 10 miles north of the Town
of Kernersville (Town). The waste disposal area comprises approximately 13.8 acres. The facility was issued
a Permit to Operate by the North Carolina Department of Waste Management, Solid Waste Section on May
15, 1985, and a Letter of Closure on December 10, 1991.
The landfill is zoned residential/agricultural and is bound on the east and west by open fields and woodlands.
The landfill is bound on the north by property owned by Waste Management and farther north by Freeman
Road, and on the south by an unnamed tributary of Belews Creek.
The landfill consists of eight landfill gas (LFG) probes located on the Town's property (designated GW-1
through GW-7) and four LFG probes shared with the Waste Management Piedmont Landfill (designated
GW-8 and GP-9 through GP-11). Historical and current LFG monitoring data shows LFG probes GW-1 and
GW-2R have had consistent exceedances of the Lower Explosive Limit (LEL) for methane and that these
LFG concentrations seem to be stable. During 2023 the methane levels ranged from 34.9% volume to 5.4%
volume and 60.3% volume to 52.8% volume in GW-1 and GW-2R, respectively. The 2023 Quarterly
Methane Monitoring Report Data is included in the attached Appendix.
CORRECTIVE ACTIONS
In July 2012, Joyce Engineering (Joyce), serving as the Town's Landfill Environmental Consultant at that
time, developed the Landfill Gas Monitoring Plan for the Site. This plan included LFG probe installation and
monthly monitoring, in which LEL exceedances for methane were discovered. Due to methane LEL
exceedances Joyce prepared and implemented the September 2013 Landfill Gas Corrective Action Plan and
installed three passive gas vents along the northern limits of the landfill waste boundary. Since July 2016,
WR has been serving as the Town's Landfill Environmental Consultant and has continued the monthly
monitoring activities. In 2018 the Landfill Gas Corrective Action Plan Addendum was approved and executed
which included the installation of an additional two passive gas vents located along the northern limits of
the landfill waste boundary in the areas of concern; one located near GW-1 and another near GW-2R. In
October 2023, WR altered these passive gas vents by installing a turbine ventilator to each one as a means
of secondary and increased ventilation.
LFG probe and vent locations are shown on Figure 1. Photos of the installed turbine ventilators are included
in the attached Appendix.
CONCLUSIONS
Based on a historical review of the LFG monitoring data and the installation of additional ventilation, WR
and the Town of Kernersville request a reduction in landfill gas monitoring from monthly to quarterly.
Kernersville Closed Landfill - Permit #34-04
Landfill Gas Monitoring Reduction Request
WR Project # 23-0402-002
February 2024
Page 1 of 2

::WithersRavenel
Our People. Your Success_
If you have any questions, comments, or concerns about this report, please contact us at [phone].
Sincerely,
WithersRavenel
Matilynn Ma ba, P.G.
Environmental Geologist II
Attachments: Figure & Appendix
Flora D'Souza, CHMM
Environmental Scientist II
Kernersville Closed Landfill - Permit #34-04 WR Project # 23-0402-002
Landfill Gas Monitoring Reduction Request February 2024
Page 2 of 2

FIGURE

R O A D GW-8
GW-3 GP-10
GP-11
wt
in
GW-5R
GW-7
GW-2R
A
GW-6
.
GW-1
A
GW-4!'��r;
,fig t
GOODWILL CHURCH ROAD
MIA —
LEGEND
FACILITY BOUNDARY
WASTE DISPOSAL BOUNDARY
AL LANDFILL GAS WELL — TOWN OF
KERNERSVILLE
NOTES:
LANDFILL GAS WELL —
WM PIEDMONT
PASSIVE GAS VENT
PASSIVE GAS VENT WITH TURBINE
1.) 2014 AERIAL OBTAINED FROM
FORSYTH COUNTY GIS DEPARTMENT
2.) PARCEL INFORMATION OBTAINED FROM
GUILFORD AND FORSYTH COUNTY
GIS DEPARTMENTS.
GRAPHIC SCALE
0 150 300 600
1 inch = 300 ft.
WithersRavenel TOWN OF KERNERSVILLE CLOSED LANDFILL DRAWNBY SCALE: FIGURE NO.:
1/ PERMIT #3CH R LANDFILL GAS PROBE LOCATION MAP MM 1°=300 1
Engineers I Planners I Surveyors GOODWILL CHURCH ROAD APPROVED BY DATE: PROJECT NO.
115 M.cK—norivcICary. NC 27511It:919.469.33401 lic-e#:F-1479I w—withersra—l.com KERNERSVILLE, FORSYTH COUNTY, NORTH CAROLINA FD 02/07/24 23-0402-002
&\23\ow2-m-2m3-2m Ianm I wmAwa- F b— 7. 2m - mmm& W71

APPENDIX
Photo Log & 2023 Quarterly Methane Monitoring Report Data

Photo 1: Turbine installed on passive gas vent located near LFG probe GW-1.
Photo 2: Turbine installed on passive gas vent located near LFG probe GW-21R.

QUARTERLY METHANE MONITORING REPORT
Town of Kernersville Closed Landfill
Permit Number 34-04
Kernersville, North Carolina
1st Quarter 2023
METHANE MONITORING DATA
1st QUARTER 2023 (JANUARY-MARCH)
Facility Name: Town of Kernersville Closed LF Permit Number
Sampling Dates: 01/10/23 1 02/14/23 03/29/23 Sampled by
34-04
M. Maltba
Probe ID
January 2023
February 2023
March 2023
Notes
CH4 (%vol.)
CH4 (%LEL)
CH4 (%vol.)
CH4 (%LEL)
CH4 (%vol.)
CH4 (%LEL)
GW-5R
0.0
0.0
0.1
2.0
0.0
0.0
GW-1
14.6
292.0
25.2
504.0
27.9
558.0
Over LEL
GW-2R
58.0
1160.0
58.5
1170.0
59.9
1198.0
Over LEL
GW-4
0.0
0.0
0.0
0.0
0.1
2.0
G W-6
0.0
0.0
0.0
0.0
0.1
2.0
GW-3
NS
NS
NS
G W-7
0.0
0.0
0.0
0.0
0.0
0.0
GW-8
NS
NS
NS
GP-9
NS
NS
NS
GP-10
NS
NS
NS
GP-11
NS
NS
NS
Notes:
GW = Gas Well -Town of Kernersville LFG monitoring location
GP = Gas Probe - LFG monitoring location shared with Waste Management Piedmont site.
NS = Probe not sampled during this monthly sampling event
1st Quarter 2023
Methane (CH4) Gas LEL Exceedances
LFG Probes GW-1 and GW-2R
100.0
50.0
0.0
January 2023 February 2023 March 2023
tGW-1 tGW-2R
Town of Kernersville Closed Landfill WithersRavenel
Permit No. 34-04 Page 1 of 1 1st Quarter 2023

QUARTERLY METHANE MONITORING REPORT
Town of Kernersville Closed Landfill
Permit Number 34-04
Kernersville, North Carolina
2nd Quarter 2023
METHANE MONITORING DATA
2nd QUARTER 2023 (APRIL-JUNE)
Facility Name: Town of Kernersville Closed LF Permit Number
Sampling Dates: 04/28/23 1 05/15/23 06/30/23 Sampled by
34-04
M. Maltba
Probe ID
April 2023
May 2023
June 2023
Notes
CH4 (%vol.)
CH4 (%LEL)
CH4 (%vol.)
CH4 (%LEL)
CH4 (%vol.)
CH4 (%LEL)
GW-5R
0.0
0.0
0.0
0.0
0.0
0.0
GW-1
32.3
646.0
32.6
652.0
34.9
698.0
Over LEL
GW-2R
59.9
1198.0
60.3
1206.0
58.5
1170.0
Over LEL
GW-4
0.0
0.0
0.0
0.0
0.0
0.0
G W-6
0.0
0.0
0.0
0.0
0.0
0.0
GW-3
NS
NS
NS
G W-7
0.0
0.0
0.0
0.0
0.0
0.0
GW-8
NS
NS
NS
GP-9
NS
NS
NS
GP-10
NS
NS
NS
GP-11
NS
NS
NS
Notes:
GW = Gas Well -Town of Kernersville LFG monitoring location
GP = Gas Probe - LFG monitoring location shared with Waste Management Piedmont site.
NS = Probe not sampled during this monthly sampling event
2nd Quarter 2023
Methane (CH4) Gas LEL Exceedances
LFG Probes GW-1 and GW-2R
100.0
50.0
0.0
April 2023 May 2023 June 2023
tGW-1 tGW-2R
Town of Kernersville Closed Landfill WithersRavenel
Permit No. 34-04 Page 1 of 1 2nd Quarter 2023

QUARTERLY METHANE MONITORING REPORT
Town of Kernersville Closed Landfill
Permit Number 34-04
Kernersville, North Carolina
3rd Quarter 2023
METHANE MONITORING DATA
3rd QUARTER 2023 (JULY-SEPTEMBER)
Facility Name: Town of Kernersville Closed LF Permit Number:
Sampling Dates: 07/12/23 1 08/16/23 1 09/29/23 Sampled by:
34-04
M. Maltba
Probe ID
July 2023
August 2023
September 2023
Notes
CH4 (%vol.)
CH4 (%LEL)
CH4 (%vol.)
CH4 (%LEL)
CH4 (%vol.)
CH4 (%LEL)
GW-5R
0.0
0.0
0.0
0.0
0.0
0.0
GW-1
27.9
558.0
22.2
444.0
16.1
322.0
Over LEL
GW-2R
52.8
1056.0
59.5
1 1190.0
53.1
1 1062.0
Over LEL
GW-4
0.0
0.0
0.0
0.0
0.0
0.0
GW-6
0.0
0.0
0.0
0.0
0.0
0.0
GW-3
NS
NS
NS
GW-7
0.0
0.0
0.0
0.0
0.0
0.0
GW-8
NS
FNS
NS
GP-9
NS
NS
NS
GP-10
NS
NS
NS
GP-11
NS
NS
NS
Notes:
GW = Gas Well -Town of Kernersville LFG monitoring location
GP = Gas Probe - LFG monitoring location shared with Waste Management Piedmont site.
NS = Probe not sampled during this monthly sampling event
3rd Quarter 2023
Methane (CH4) Gas LEL Exceedances
LFG Probes GW-1 and GW-2R
100.0
50.0
0.0
July 2023 August 2023 September 2023
tGW-1 tGW-2R
Town of Kernersville Closed Landfill WithersRavenel
Permit No. 34-04 Page 1 of 1 3rd Quarter 2023

QUARTERLY METHANE MONITORING REPORT
Town of Kernersville Closed Landfill
Permit Number 34-04
Kernersville, North Carolina
4th Quarter 2023
METHANE MONITORING DATA
4th QUARTER 2023 (OCTOBER-DECEMBER)
Facility Name: Town of Kernersville Closed LF Permit Number:
Sampling Dates: 10/31/23 1 12/07/23 1 12/21/23 Sampled by:
34-04
M. Maltba
Probe ID
October 2023
November 2023
December 2023
Notes
CH4 (%vol.)
CH4 (%LEL)
CH4 (%vol.)
CH4 (%LEL)
CH4 (%vol.)
CH4 (%LEL)
GW-1
8.7
174.0
5.4
108.0
7.1
142.0
Over LEL
GW-2R
58.5
1170.0
57.5
1150.0
54.7
1094.0
Over LEL
GW-4
0.0
0.0
0.0
1 0.0
0.0
1 0.0
GW-5R
0.0
0.0
0.0
0.0
0.0
0.0
GW-6
0.0
0.0
0.0
0.0
0.0
0.0
GW-7
0.0
0.0
0.0
0.0
0.0
0.0
GW-3
NS
NS
NS
GW-8
NS
NS
NS
GP-9
NS
NS
NS
GP-10
NS
NS
NS
GP-11
NS
NS
NS
Notes:
GW = Gas Well -Town of Kernersville LFG monitoring location
GP = Gas Probe - LFG monitoring location shared with Waste Management Piedmont site.
NS = Probe not sampled during this monthly sampling event
4th Quarter 2023
Methane (CH4) Gas LEL Exceedances
LFG Probes GW-1 and GW-2R
100.0 -
50.0
0.0
October 2023 November 2023 December 2023
�GW-1 �GW-2R
Town of Kernersville Closed Landfill WithersRavenel
Permit No. 34-04 Page 1 of 1 4th Quarter 2023