9209_Wake_NorthWake_Unlined_MSWLF_June2020LFG_1469386_20201020

ENR USE ONLY: ❑P3 er Report ❑ Electronic Data - Email CD data loaded: Yes / 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):
SCS Engineers, PC
Contact for questions about data formatting. Include data preparer's name, telephone number and E-mail address:
Name: Jacob Smith 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)
June 24, 2020
North Wake County Landfill 9004 Deponie Drive 92-09 .1600
Raleigh, NC 27615
i
Environmental Status: (Check all that apply)
Initial/Background Monitoring ❑X Detection Monitoring Assessment Monitoring ❑ Corrective Action
Type of data submitted: (Check all that apply)
Groundwater monitoring data from monitoring wells ❑X Methane gas monitoring data
Groundwater monitoring data from private water supply wells Corrective action data (specify)
Leachate monitoring data
Surface water monitoring data Other(specify)
Notification attached?
H 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.
❑X 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.
Robert E. Dick, PE Project Director
Facility Representative Name (Print) Title
�- (o - 30 20
Sig
15521 Midlothian Turnpike, Suite 305, Midlothian, VA 23113
Facility Representative Address
C-1837
NC PE Firm License Number (if applicable effective May 1, 2009)
Revised 6/2009
Date
804.378.7440
(Area Code) Telephone Number
Affix NC Licen `J1V#Vk"h9n 1 Geologist Seal
SEAL
022790
r��rllllllltj�l

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 Statute 132-1. As such,
these documents are available for inspection and examination by any person upon request (NC General Statute 132-6).
Facility Name: North Wake County Landfill Permit Number: 92-09
Date of Sampling:
6/24/20
NC Landfill Rule (.0500 or .1600): .1600
Name and Position of Sample Collector: Jacob Smith Staff Professional
Type and Serial Number of Gas Meter: GEM-5000 / G504544 Calibration Date of Gas Meter: 7/24/19
Date and Time of Field Calibration: 6/24/20
7:05
Type of Field Calibration Gas (15115 or 35/50): 35/50 Expiration Date of Field Calibration Gas Canister: 10/1/22
Pump Rate of Gas Meter:
500 mL
Ambient Air Temperature: 73°F Barometric Pressure: 29.6 General Weather Conditions: Sunny
Instructions: Under "Location or LFG Well" identify the monitoring wells or describe the location for other tests (e.g., inside
buildings). A drawing showing the location of test must be attached. Report methane readings in both % LEL and % methane
by volume. A reading in percent methane by volume can be converted to % LEL as follows: % methane by volume = %
LEL/20
Location
or LFG
Well ID
Sample
Tube
Pure
Time
Time
Pumped
(s)
Initial
%LEL
Stabilized
%LEL
%CH4
by
Volume
%02
%CO2
Notes
All Wells
375 mL
45
see Exhibit 1
If your facility has more gas monitoring locations than there is room on this form, please attach additional sheets listing the
same information as contained on this form.
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 Inc ir�g the possibility of a fine and imprisonment.
Staff Professional
SIGNATi1R TITLE

Environmental Consulting & Contracting
June 30, 2020
File No. 02199312.07-1
Mr. Lee Squires, P.E.
Facility Manager
Wake County Solid Waste Management Division
PO Box 550
Raleigh, NC 27602
Subject: Second Quarter Landfill Gas Monitoring Event - June 24, 2020
North Wake County Landfill - Wake County, North Carolina
Dear Lee:
SCS Engineers, PC (SCS) is pleased to submit the results of the Second Quarter Landfill Gas (LFG)
Monitoring Event for 2020, performed at the North Wake County Landfill (Permit No. 92-09) on June
24, 2020.
The monitoring was performed in accordance with 15A NCAC 13B.1626(4) at the compliance
boundary monitoring probes and on -site structures at the facility. At the facility property boundary,
the concentration of methane gas is not to exceed the Lower Explosive Limit (LEL) which is 5 percent
by volume (50,000 ppmv). Inside facility structures, the concentration of methane gas is not to
exceed 25 percent of the LEL (equivalent to 12,500 ppmv).
At each boundary compliance monitoring probe, SCS recorded the subsurface landfill gas (LFG)
composition (i.e., concentrations of methane, carbon dioxide, and oxygen) and pressure using a
GEM-5000 Infrared Gas Analyzer. Measurements inside facility structures were obtained at critical
locations such as conduit penetrations, junction boxes, floor drains, etc. using a Sensit Model No.
HXG-3P. The results of the boundary compliance probe and on -site structure monitoring are
attached as Exhibit 1. An executed copy of the NC Division of Waste Management - Solid Waste
Section, Landfill Gas Monitoring Data Form, documenting this event is also attached for your facility
records.
Monitoring was conducted at a total of 26 LFG monitoring probes and 4 on -site structures on June
24, 2020. Monitoring of the on -site structures did not record measurable methane concentrations
above the instrument detection level, which is below the regulatory limit. One LFG monitoring probe
at the Landfill (probe M-6R) exhibited methane concentrations greater than the regulatory
compliance threshold of 5.0 percent. Probe M-6R is located on the eastern side of the closed,
unlined cell. Upon detection, SCS immediately notified the County and all necessary steps were
taken to ensure protection of human health. It should be noted that no occupied structures are in
proximity to monitoring probe M-61R. SCS conducted monitoring of the nearby perimeter migration
and control system wells and noted that the system was operating under normal conditions. On June
25, 2020, Wake County personnel informed SCS that after several minutes of continued pumping of
probe M-6R with the gas analyzer, a reading below the compliance threshold was recorded. NCDEQ
was notified of this exceedance via electronic mail on June 25, 2020.
15521 Midlothian Turnpike, Suite 305, Midlothian, VA 23113 1 804-378-7440 ;ot

Mr. Lee Squires
June 30, 2020
Page 2
As required by 15A NCAC 13B Section .1626(4)(c)(iii), the Facility has implemented a LFG
Remediation Plan, most recently updated on July 12, 2007. In accordance with the plan, the
frequency for monitoring the impacted LFG probe (M-613) will be monthly and will continue until such
time that the probe has demonstrated compliant methane concentrations for three consecutive
months. At that time, the monitoring on the probe will revert back to a quarterly basis. Since
operational adjustments will be made to increase the LFG perimeter migration control system
effectiveness in accordance with the current LFG Remediation Plan, the County and SCS believe that
an update to the plan is not necessary at this time. However, if additional remediation efforts are
warranted based on subsequent monitoring results, the County will revisit the requirements to
update the existing LFG Remediation Plan.
Note that placing this letter report into the operating record satisfies the requirements of 15A NCAC
13B Section .1626(4)(c)(ii).
SCS will coordinate with the County to conduct the monthly monitoring at probe M-6R and will notify
Wake County of the proposed schedule for the Third Quarter LFG compliance boundary probe
monitoring event for 2020 (to be performed prior to September 30, 2020).
Please contact either of the undersigned if you have questions or require additional information.
Sincerely,
j4':� �'
Jacob D. Smith
Staff Professional
SCS Engineers, PC
JDS/LSN:asd
Encl.
�- -4- J""',
Lucas S. Nachman
Staff Professional
SCS Engineers, PC

EXHIBIT 1. LANDFILL GAS MONITORING PROBES
NORTH WAKE COUNTY LANDFILL - WAKE COUNTY, NORTH CAROLINA
Date: June 24, 2020 Personnel: JDS
Project No: 02199312.07-1 Equipment: GEM-5000
Weather: Sunny, 73' Sensit HXG-3P
Monitoring
Carbon
Balance
Interior Monitoring
Methane
Probe
Date
Time
Methane
% LEL
Dioxide
Oxygen
Gas
Pressure
Location
(ppm)
No.
(24-hr)
(% vol)
(5% CH4)
(% vol)
(% vol)
(% vol)
(in-wc)
M 1 *
6/24/20
9:23
0.0
0
0.0
18.6
81.4
-0.01
Admin. Offices
M 2*
6/24/20
9:29
0.0
0
0.0
18.7
81.3
-0.02
Offices (4)
0
M 3R
6/24/20
9:36
0.0
0
1.8
16.6
81.6
0.00
Reception Area
0
M 4
6/24/20
9:41
0.0
0
0.8
18.3
80.9
0.00
Bathrooms (2)
0
M 5*
6/24/20
9:48
0.0
0
0.2
18.7
81.1
-0.05
Conference Area
0
M 6R*
6/24/20
10:00
12.6
252
16.6
2.5
68.3
-0.08
Kitchen
0
M 7*
6/24/20
9:05
0.0
0
0.0
18.4
81.6
-0.02
Storage Area
0
M 8*
6/24/20
9:08
0.0
0
0.1
18.4
81.5
-0.03
Maintenance Shop
M 9*
6/24/20
9:15
0.0
0
0.1
18.4
81.5
-0.02
Service Bay
0
M 10*
6/24/20
8:40
0.0
0
8.3
4.0
87.7
-0.01
Playground Area
M 1 1 *
6/24/20
10:48
0.0
0
0.0
18.1
81.9
-0.05
Restrooms (2)
0
M 12*
6/24/20
8:35
0.0
0
1.0
17.8
81.2
-0.06
NWLF Collection Center Office
M 13*
6/24/20
8:30
0.0
0
0.1
18.5
81.4
-0.04
Office
0
M 14*
6/24/20
8:26
0.0
0
7.2
14.6
78.2
-0.05
Bathroom
0
M 15*
6/24/20
1 1:14
0.0
0
2.1
16.2
81.7
-0.02
M 16
6/24/20
8:21
0.0
0
1.0
17.7
81.3
0.00
M 17*
6/24/20
1 1:02
0.0
0
0.0
18.2
81.8
-0.01
M 18*
6/24/20
10:56
0.0
0
0.9
16.8
82.3
-0.01
M 19R*
6/24/20
8:49
0.0
0
2.8
14.9
82.3
-0.01
M 20*
6/24/20
8:53
0.0
0
0.1
18.2
81.7
-0.09
M 21 *
6/24/20
8:57
0.0
0
0.1
18.3
81.6
-0.46
M 22*
6/24/20
9:01
0.0
0
0.1
18.3
81.6
-0.81
M 23*
6/24/20
9:1 1
0.0
0
0.0
18.4
81.6
-0.1 1
M 24*
6/24/20
9:19
0.0
0
0.0
18.5
81.5
-0.1 1
M 25*
6/24/20
10:06
0.0
0
0.1
19.0
80.9
-0.02
M 26*
6/24/20
10:20
0.0
0
0.4
18.6
81.0
-0.02
Notes:
ppm = parts per million
*Negative pressure values are likely attributed to a partial liquid blockage

Project No: 02199312.07-1 CALIBRATION LOG Facility: North Wake Landfill
Date: 6/24/20 Personnel: Jacob Smith
GAS ANALYZER
Calibration
Model:
GEM-5000
Serial No:
G504544
Date:
7/24/19
GAS CYLINDER
Concentration
ID
Exp. Date
Time
Gas
% Vol
Results
4928899
10/1 /22
7:05
CH4
15150
50.0 %
4928899
10/1/22
7:05
CO2
15 / 35
35.0 %
4925901
9/1/22
7:07
02
4
4.0 %
WEATHER CONDITIONS
Barometric
Temperature: 73 °F Pressure: 29.6 "Hg
Current Conditions: Sunny