0601_AveryCounty_MSWLF_LFG_FID1890694_20240730

DocuSign Envelope ID: 528F5D41-45EB-47F1-8007-59DED5C662CC
DENR USE ONLY ❑Paper Report ❑Electronic Data - Email CD (data loaded: Yes / No Doc/Event #:
NC DENR I I 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 213 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):
Smith Gardner, Inc.
Contact for questions about data formatting. Include data preparer's name, telephone number and E-mail address:
Name: Seth C. Rickerts, P.G.
E-mail: [e-mail]
Phone: [phone] x 135
NC Landfill Rule: Actual sampling dates (e.g.,
Facility name: Facility Address: Facility Permit # (.0500 or .1600) October 20-24, 2006)
Avery County Closed MSW Landfill Brushy Creek Road, Spruce Pine, NC 06-01 .0500 May 16, 2024
Environmental Status: (Check all that apply)
❑ Initial/Background Monitoring ❑ Detection Monitoring ❑X Assessment Monitoring Corrective Action
of data submitted: (Check all that apply)
Groundwater monitoring data from monitoring wells ❑X
Groundwater monitoring data from private water supply wells ❑
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, 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.
Seth C. Rickerts, P.G. Project Geologist 919-828-0577 x 135
(Print)
C.
14 N. Boylan Ave, Raleigh, NC 27603
Title
Facility Representative Address
F1370
NC PE Firm License Number (if applicable effective May 1, 2009)
Revised 6/2009
6/25/2024
Date
(Area Code) Telephone Number
Affix NC; I Prnfaccinnal ('­Iogist Seal
NS
6/2 /2624
2758 =
Co "n".6,O L Al. ~
JJff J/II fA Ilk 11"Vj11

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SMITH GARDNER
ADDRESS TEL WEB
14 N. Boylan Avenue, Raleigh NC 27603 919.828.0577 www.smithgardnerinc.com
June 24, 2024
Ms. Jaclynne Drummond
NCDENR DWM Solid Waste Section
2090 U.S. 70 Highway
Swannanoa, North Carolina 28778-8211
RE: Operations, Monitoring, and Maintenance Report — May 2024
Avery County Closed MSW Landfill (Permit No. 06-01)
Spruce Pine, North Carolina
Dear Ms. Drummond:
On behalf of Avery County (County), Smith Gardner, Inc. (S+G) is pleased to present this report
regarding the operation and maintenance (0&M) of the Avery County Closed MSW Landfill
(Permit No. 06-01) Landfill Gas Collection and Control System (LFGCCS), and the perimeter
monitoring probes for May 2024. Site details are provided below.
SITE HISTORY
The Avery County Closed MSW landfill is located approximately 0.6 miles southeast of the
intersection of Highway 19 and Brushy Creek Mountain Road next to the Avery County Airport
and the Unimin Corporation mine facility. There is no active mining in the immediate vicinity
of the landfill.
The MSW landfill was operated from 1970 until it closed in 1993. The property consists of
approximately 14.4 acres, with the landfill footprint occupying approximately 9.6 acres of the
site. The landfill topography ranges in elevation from approximately 2770 ft. msl to 2670 ft.
msl, and slopes downhill toward Brushy Creek.
Landfill gas monitoring and LFGCCS maintenance is completed monthly due to landfill gas
concentrations detected in monitoring probes off -site.
LFG COLLECTION AND CONTROL SYSTEM MONITORING ACTIVITIES
The site has an active Landfill Gas Collection and Control System (LFGCCS) which was
expanded in May 2024. The expansion included the installation of four (4) new landfill gas
extraction wells, approximately 100 feet of horizontal collector trench, and modifications to
existing monitoring probe connections at P-1, P-3, and P-7. Following construction, the system
consists of 14 landfill gas extraction wells (W-1 through W-14), horizontal collection trench,
HDPE piping for transmission of collected landfill gas, a one and a half (1.51 horsepower
blower, a condensate trap and storage tank, a candlestick flare, and associated valves and
gauges.

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Ms. Drummond
June 24, 2024
Page 2 of 4
Well field and flare station data are provided in the attached Table 1.
LFG Well Field
S+G performed methane (CH4), oxygen (02), and carbon dioxide (CO2) monitoring as well
as temperature and pressure monitoring. In general, gas quality varies across the
wellfield. All wells had recorded an oxygen level below 5% this sampling event. The
wells will continue to be tuned to limit the concentration of oxygen in the landfill gas.
Flare Station
Gas quality measured at the flare is nominal with moderate levels recorded of
methane, and moderate levels recorded of oxygen. The wellfield will continue to be
monitored, tuned, and maintained as necessary to identify potential issues with the
system and to improve gas quality levels.
LFG MONITORING WILL (PERIM[TER) MONITORING PROGRAM
S+G performed monitoring of the perimeter LFG monitoring network during this event. The
network consists of probes P-1 through P-13 located around the facility, and in some cases,
on adjacent properties. Monitoring results for this month indicate the following probes have
detectable methane concentrations:
• P-1
• P-3
• P-7
Monitoring probes P-1, P-3 and P-7 had observed concentrations above the lower explosive
Limit (LEL); the concentration in P-1 was 5.1 %, P-3 was 14.0% and P-7 was 17.3%. Overall, the
three (3) probes with detectable levels of methane saw an increase in concentration from the
April 2024 event. This is most likely due to the active construction happening on the LFGCCS.
Attachment 1 includes the monitoring forms with results while Attachment 2 provides a CH4
concentration graph over time for monitoring wells that have historically had methane
present. Monitoring of the current well network will continue, and data will be reported to
NCDEQ and the County.
CONCLUSIONS
Monitoring probes P-1, P-3 and P-7 will continue to be monitored closely. S+G will continue to
monitor the methane concentrations at the site monthly, and advise the County as needed on
repairs required to maintain an effective collection system.
The next monitoring event is scheduled for June 2024. If you have any questions, or require
additional information, please contact us at your earliest convenience at 919-828-0577 or by
e-mail (address below).

DocuSign Envelope ID: 528F5D41-45EB-47F1-8007-59DED5C662CC
Ms. Drummond
June 24, 2024
Page 3 of 4
Sincerely,
SMITH GARDNER, INC.
I
�A'Vu' j V owui' '1.
DocuSigned by:
5DD73DOAEAB2442...
Daniel J. Pantaleo
Environmental Technician ext. 140
daniel(asmithaardnerinc.com
Attachments
cc: Eric Foster - Avery County
file
E DOCUS''gned
by:(can c— tZ",
3B8305C978EA4E6...
Seth C. Rickerts, P.G.
Project Geologist ext. 135
seth(asmithaardnerinc.com
cOQ���`GENSFQ C��
SEAL 6/2
2758
(P C.1110
4

DocuSign Envelope ID: 528F5D41-45EB-47F1-8007-59DED5C662CC
Ms. Drummond
June 24, 2024
Page 4 of 4
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MUM

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• T� ' 1 • . 04 0 EXISTING LANDFILL GAS PROBE
• +• ® OFFSITE STRUCTURE TO BE
lor ' •^ ■ MONITORED
,,. •tea, REFERENCES
«� 1. ADJACENT PROPERTIES ARE FROM AVERY COUNTY GIS MAPPING
DEPARTMENT.
_• r 2. MONITORING WELL LOCATIONS FROM FIELD SURVEY DATED 1/14/08, BY
SURVEYING SOLUTIONS, P.C.
3. PROPERTY LINE FROM FIELD SURVEY DATED APRIL 9, 2010, BY
.1�►.,N APPALACHIAN PROFESSIONAL LAND SURVEYORS & CONSULTANTS.
• 4. LFG PROBES LOCATIONS FROM FIELD SURVEY DATED APRIL 9, 2010, BY
APPALACHIAN PROFESSIONAL LAND SURVEYORS & CONSULTANTS.
�, • • PROBE P-2, P-3, AND P-9 THROUGH P-13 LOCATIONS WERE NOT
•; SURVEYED AND ARE APPROXIMATE.
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TABLES

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DocuSign Envelope ID: 528F5D41-45EB-47F1-8007-59DED5C662CC
SMITH GARDNER
P.
. • t.;.te :• • •% • o • • •
DNE June 24, 2024
BY DJP
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AVERY-W1
1 5/16/2024
73.2
1 25.2
0.5
1 1.1
77.2
-14.83
-23.67
-0.024
1 0
0
1 -28.27
AVERY-W2
5/16/2024
82.9
17
0
0.1
76.2
2.15
-10.59
0.034
0.4
0
-14.72
AVERY-W3
5/16/2024
79.3
20.6
0.1
0
79.6
16.26
-0.35
0.041
0.5
0
-16.23
AVERY- W4
5/16/2024
68.3
19.8
1.4
10.5
77
-21.56
-21.55
0.02
5
4
-21.63
AVERY-W5
5/16/2024
74.1
24.4
0.4
1.1
75.1
0
-3
1 0.016
0.5
0
-22.57
AVERY- W6
5/16/2024
49
23.3
0.1
27.6
77.7
-8.08
-9.51
0.023
9.5
7.8
-22.16
AVERY-W7
5/16/2024
25.7
15.6
3
55.7
88.8
-0.41
-0.37
0.041
0.1
0.1
-21.88
AVERY-W8
5/16/2024
66.8
31.1
0.5
1.6
75.7
-0.03
-4.31
0.01
0.2
0
-25.45
AVERY-W9
5/16/2024
46.2
21.8
4.3
27.7
87.6
-14.14
-14.14
0.036
6.4
5.5
-14.15
AVERY-W10
5/16/2024
71.2
28.7
0.1
0
73.4
11.58
-12.51
-0.9
«»
«»
-20.64
AVERY-W11
5/16/2024
50.4
26.6
0.8
22.2
85.3
-28.73
-28.53
-0.016
0
0
-29.18
AVERY-W12
5/16/2024
64.2
26.9
1.5
7.4
79.6
-21.87
-21.78
0.024
0.3
0.3
-21.7
AVERY-W13
5/16/2024
67.6
20.2
1.5
10.7
82.2
-21.72
-21.71
0.032
0.4
0.3
-21.66
AVERY-W14
5/16/2024
33.3
14.1
11
41.6
83.5
-25.57
-25.54
0.021
0.3
0.2
-25.19
AVERY--RP1
5/16/2024
17.5
7.2
13.9
61.4
82.2
-20.68
-19.01
0.034
6
4.8
-21.16
AVERY-RP3
5/16/2024
14.3
12.9
5.5
67.3
85.7
-3.16
-3.16
0.085
9.7
8.4
-14.13
AVERY-RP7
5/16/2024
3.7
3.3
15.1
77.9
78.5
-22.96
-2.06
0.011
0.2
0.3
-22.9
AVERY-HC1
5/16/2024
1.7
7.5
8.7
82.1
70
-2.73
-3.73
-5.093
0
0
-23.22
Av-Flare
5/16/2024
13.4
4.6
16.3
65.7
0
17.46
17.47
6.205
62.5
62.6
17.46
*The differential pressure measurement should be positive. A negative differential pressure may indicate no gas flow. Negative differential
pressure can be the result of dirt or water obstructing the pitot tube perforations. Ooerpulling by adjacent extraction wells may also result
in negative pressure being displayed.
N R= not recorded

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ATTACHMENT 1
PERIMETER MONITORING PROBE DATA

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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: Avery County Closed MSW Landfill Permit Number: 06-01
Date of Sampling: 05/16/2024 NC Landfill Rule (.0500 or .1600): .0500
Name and Position of Sample Collector: Spencer W. Hollomon - Project Engineer
Type and Serial Number of Gas Meter: GEM5000, G506472
Date and Time of Field Calibration: 05/16/2024, 1210
Calibration Date of Gas Meter: 02/2024
Type of Field Calibration Gas (15115 or 35/50): 35/50 Expiration Date of Field Calibration Gas Canister: 08/2025
Pump Rate of Gas Meter: 0.5 LPM
Ambient Air Temperature: 77 F Barometric Pressure: 29.83 in Hg 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
Sainple Tube
Purge
Time
Time
Pumped (s)
Initial
°,ZEL
Stabilized
°,,ZEL
Of4L-H4
by
Volume
%02
%CO2
Notes
H 2 S p p m
P-1
>60s
1237
>60s
102
102
5.1
16.4
3.5
0
P-2
>60s
1252
>60s
4
4
0.2
20.4
0.0
0
P-3
>60s
1254
>60s
280
280
14.0
8.6
11.9
0
P-4
>60s
1259
>60s
4
4
0.2
19.2
2.8
0
P-5
>60s
1303
>60s
4
4
0.2
18.5
2.6
0
P-6
>60s
1308
>60s
4
4
0.2
19.8
1.2
0
P-7
>60s
1318
>60s
346
346
17.3
0.2
14.8
2
P-8
>60s
1325
>60s
6
6
0.3
18.5
2.6
1
P-9
>60s
1244
>60s
4
4
0.2
18.6
1.6
0
P-10
>60s
1241
>60s
4
4
0.2
18.9
0.9
0
P-11
>60s
1247
>60s
4
4
0.2
18.0
2.1
0
P-12
>60s
1322
>60s
8
8
0.4
21.0
0.1
1
P-13
>60s
1542
>60s
4
4
0.2
9.2
8.9
2
Airport Structures
>60s
1540
>60s
4
4
0.2
21.4
0.0
2
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 including the possibility of a fine and imprisonment.
DocuSigned, by:
soD73DOAEAB2442... Project Engineer
SIGNATURE
TITLE

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ATTACHMENT 2
HISTORICAL PERIMETER MONITORING PROBE TRENDS

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80.0
70.0
60.0
E 50.0
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40.0
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30.0
20.0
10.0
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By. DJP
Date: 05/31/2024
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(October 2022)
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(May 2023)
(September 3, 2015)
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