0601_AveryCounty_LFG_DIN28322_20170125

January 31, 2017

Ms. Jaclynne Drummond
NCDENR DWM Solid Waste Section
2090 U.S. 70 Highway
Swannanoa, North Carolina 28778-8211

RE: Operations, Monitoring, and Maintenance Report –Jan 2017
Avery County Closed MSW Landfill
Spruce Pine, North Carolina

Dear Ms. Drummond:

Smith Gardner, Inc. (S+G) is pleased to present this report concerning the operation and
maintenance (O&M) of the Avery County Closed MSW Landfill (Permit No. 06-01) Landfill Gas
Collection and Control System (LFGCCS). Monitoring of the on- and off-site landfill gas
probes was also performed. Mr. Frank Terry with S+G performed the site visit on January 25,
2017. Site visit details are provided below.

LFG EXTRACTION WELL MONITORING PROGRAM

Monthly monitoring of the LFGCCS will continue and shall include the following items:

 CH4, O2, CO2, and pressure monitoring at each extraction well head;
 CH4, O2, CO2, and pressure monitoring at the flare station; and
 Adjustment of the LFGCCS to balance recovery and ensure safe system operation.

The County will maintain this LFGCCS and will continue to evaluate the effectiveness of
increased LFG recovery from the waste mass in alleviating off-site LFG migration. Results
from monthly monitoring events will be reported in accordance with the approved LFG
Monitoring Plan.

LFG EXTRACTION WELL MONITORING ACTIVITIES

Mr. Terry performed the flare station and well field monitoring on January 25, 2017. Initial
measurements indicated there was approximately 32 inches of available vacuum average
throughout the well field, ranging from approximately 31 to 32 inches of available vacuum at
each of the LFG wells across the well field. The results from this event are summarized
below. Recommended actions are underlined. Well field data and flare station data are
provided in the attached Table 1.

Ms. Drummond
January 31, 2017
Page 2 of 3
LFG Extraction Well Field

 W-1 through W-10: S+G performed methane (CH4), oxygen (O2), carbon dioxide
(CO2), and pressure monitoring. No wellhead valves were adjusted during this
sampling event.

 Orifice Plates: S+G continues to evaluate orifice plate sizes at wells W5, W7, W9,
and W10 during each site visit. As LFG flow potential at these locations remains
stable, the correct orifice plate sizes are currently installed.

Flare Station

 Condensate Tank: The condensate tank was observed during this site visit; the
liquid was at an acceptable level. S+G will continue to monitor the liquid level of
the condensate tank.

 Filter Tank: The filter tank was observed during the site visit and the liquid level
was found to be at a high level The tank was drained and returned to normal
operating status. S+G will continue to monitor the liquid level of the filter tank.

 Flare operation: Due to low concentrations of methane measured at the flare
combustion was not observed. The spark generator was operational; however,
the flare was not able to be ignited prior to S+G leaving the site. S+G will continue
to adjust the system to optimize gas flow and quality.

LFG MONITORING WELL (PERIMETER) MONITORING PROGRAM
Mr. Terry performed monitoring of the perimeter LFG monitoring network during this event.
Monitoring Wells P-1, P3 exhibited CH4 concentration readings of 5.6%, 6.6%, respectively
which exceeds the LEL of 5%. Monitoring Wells P-7, P-13 exhibited CH4 concentration
readings of 1.2%, 0.6%, respectively but did not exceed the LEL of 5%. The other wells,
monitored during this event, had no detectable concentrations of CH4. Results of this
monitoring event are included in Attachment 1. Attachment 2 provides a CH4 concentration
graph over time for monitoring wells that have historically had methane present. The
current well network will continue to be monitored and data will be reported to NCDEQ and
the County.

CONCLUSIONS

The site has been generally characterized by a trend of consistently decreasing LFG
concentrations. Elevated methane concentrations have been observed in a few wells during
the past few monitoring events. CH4 concentrations during the January 2017 which exceed
the LEL may be attributable to system vacuum fluctuations caused by a high liquid level in
the flare inlet filter vessel. We will continue to monitor the CH4 concentrations at the site
monthly.
Ms. Drummond
January 31, 2017
Page 3 of 3

The next routine monitoring event is scheduled for February 2017. 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).

Sincerely,
SMITH GARDNER, INC.

Frank Terry Madeline German, P.G.
Project Manager, ext. 142 Project Geologist ext. 222
[e-mail] [e-mail]

Attachments

cc: Eric Foster – Avery County
Deb Aja – NCDEQ
file

H:\Projects\Avery County (NC)\Avery-15-1 (LFG Sys Ops)\2017 LFG Monitoring\1 Jan 2017\Avery Co MSW LFG Monitoring Rpt JAN 2017.docx

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Attachment 1

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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: ______________________________________________ Permit Number: ____________________________
Date of Sampling: ___________________ NC Landfill Rule (.0500 or .1600): _____________________________________
Name and Position of Sample Collector: _________________________________________
Type and Serial Number of Gas Meter: _______________________________ Calibration Date of Gas Meter: ___________
Date and Time of Field Calibration: _____________________
Type of Field Calibration Gas (15/15 or 35/50): ____________ Expiration Date of Field Calibration Gas Canister: ________
Pump Rate of Gas Meter: _____________
Ambient Air Temperature: __________ Barometric Pressure: ______________ General Weather Conditions: _____________
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
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.
__________________________________ ________________________
SIGNATURE TITLE
.0500
Avery County Closed Landfill 06-01
1/25/17 .0500
Frank Terry S+G
ENVISION, 1510204 12/7/2017
1/25/17 11:08 AM
15/15 10/2018
0.5 L/min
60 29.82 sunny
P-1 > 60 s 1203 > 60 s 112 112 5.6 16.5 3.9
P-2 > 60 s 1207 > 60 s 0 0 0 20.9 0
P-3 > 60 s 1211 > 60 s 132 132 6.6 13.9 6.3
P-4 > 60 s 1222 > 60 s 0 0 0 19.8 0.8
P-5 > 60 s 1227 > 60 s 0 0 0 19.5 1.9
P-6 > 60 s 1139 > 60 s 0 0 0 18.0 2.4
P-7 > 60 s 1131 > 60 s 24 24 1.2 1.1 15.7
P-8 > 60 s 1147 > 60 s 0 0 0 14.8 4.0
P-9 > 60 s 1240 > 60 s 0 0 0 20.0 0.3
P-10 > 60 s 1236 > 60 s 0 0 0 11.6 7.2
P-11 > 60 s 1248 > 60 s 0 0 0 20.5 0.0
P-12 > 60 s 1152 > 60 s 0 0 0 20.5 0.9
P-13 > 60 s 1327 > 60 s 12 12 .6 3.1 13.6
Project Manager, S+G
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: ______________________________________________ Permit Number: ____________________________
Date of Sampling: ___________________ NC Landfill Rule (.0500 or .1600): _____________________________________
Name and Position of Sample Collector: _________________________________________
Type and Serial Number of Gas Meter: _______________________________ Calibration Date of Gas Meter: ___________
Date and Time of Field Calibration: _____________________
Type of Field Calibration Gas (15/15 or 35/50): ____________ Expiration Date of Field Calibration Gas Canister: ________
Pump Rate of Gas Meter: _____________
Ambient Air Temperature: __________ Barometric Pressure: ______________ General Weather Conditions: _____________
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
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.
__________________________________ ________________________
SIGNATURE TITLE
____________________________________________
URE
.0500
Avery County Closed Landfill 06-01
1/25/17 .0500
Frank Terry S+G
ENVISION, 1510204 12/7/2017
1/25/17 11:08 AM
15/15 10/2018
0.5 L/min
60 29.82 sunny
Avery County Airport Structure p1
P-2 > 60 s 1207 > 60 s 0 0 0 20.9 0
P-3 > 60 s 1211 > 60 s 132 132 6.6 13.9 6.3
P-4 > 60 s 1222 > 60 s 0 0 0 19.8 0.8
P-5 > 60 s 1227 > 60 s 0 0 0 19.5 1.9
P-6
P-2 > 60 s 1131 > 60 s 24 24 1.2 1.1 15.7
P-3 > 60 s 1147 > 60 s 0 0 0 14.8 4.0
P-4 > 60 s 1240 > 60 s 0 0 0 20.0 0.3
P-5 > 60 s 1236 > 60 s 0 0 0 11.6 7.2
P-11
P-2 > 60 s 1152 > 60 s 0 0 0 20.5 0.9
P-3 > 60 s 1327 > 60 s 12 12 .6 3.1 13.6
P-4
P-5
P-2
P-3
P-4
P-5
Avery County Airport Structure p5
P-2
P-3
P-4
P-5
Project Manager, S+G
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: ______________________________________________ Permit Number: ____________________________
Date of Sampling: ___________________ NC Landfill Rule (.0500 or .1600): _____________________________________
Name and Position of Sample Collector: _________________________________________
Type and Serial Number of Gas Meter: _______________________________ Calibration Date of Gas Meter: ___________
Date and Time of Field Calibration: _____________________
Type of Field Calibration Gas (15/15 or 35/50): ____________ Expiration Date of Field Calibration Gas Canister: ________
Pump Rate of Gas Meter: _____________
Ambient Air Temperature: __________ Barometric Pressure: ______________ General Weather Conditions: _____________
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
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.
__________________________________ ________________________
SIGNATURE TITLE
_____________________________________________________________________________________________________________
ATURE
.0500
Avery County Closed Landfill 06-01
1/25/17 .0500
Frank Terry S+G
ENVISION, 1510204 12/7/2017
1/25/17 11:08 AM
15/15 10/2018
0.5 L/min
60 29.82 sunny
Project Manager, S+G
P-1
NE Corner >60s 1327 >60s 0 0 0 20.9 0
Np Corner >60s 1329 >60s 0 0 0 20.9 0
SE Corner >60s 1331 >60s 0 0020.9 0
Sp Corner >60s 1333 >60s 0 0 0 20.9 0

Attachment 2

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By:FAT
Date:1/31/2017
Avery County MSW LandfillLandfill Gas Monitoring Well Network
Methane Concetrations Between May 2011 and January 2017
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1
6
Ju
l
-
1
6
Au
g
-
1
6
Se
p
-
1
6
Oc
t
-
1
6
No
v
-
1
6
De
c
-
1
6
Ja
n
-
1
7
Fe
b
-
1
7
P1
P3
P7
P11
P12
P13
Well
% CH4 by
Volume
Installation of W9 and W10
(April 30, 2013) Installation of W9/P3
Connection
(September 11, 2014
Installation of P7/W8 and P1/W10 Connection (September 3, 2015)

Th
i
s

p
a
g
e

i
n
t
e
n
t
i
o
n
a
l
l
y

l
e
f
t

b
l
a
n
k
.