HomeMy WebLinkAbout0601_AveryCounty_LFG_DIN28321_20170223
February 24, 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 –Feb 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 February
23, 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 February 23, 2017. Initial
measurements indicated there was approximately 35 inches of available vacuum at the
vacuum blower inlet, ranging from approximately 33 to 34 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
February 24, 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. Wellhead valves at W-7 and W-8 were adjusted to
increase applied vacuum during this sampling event.
• Orifice Plates: S+G continues to evaluate orifice plate sizes at wells W-5, W-7, W-
9, and W-10 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 normal level. 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,
attempts manually ignite the flare were unsuccessful. 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, P-3, P-7, and P-13 exhibited CH4 concentration readings of 4.0%, 3.2%,
1.1%, and 0.1% respectively which do 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 and flow rate. Methane concentrations have declined from the January 2017
monitoring event in several probes during this monitoring event. We will continue to monitor
the CH4 concentrations at the site monthly.
Ms. Drummond
February 24, 2017
Page 3 of 3
The next routine monitoring event is scheduled for March 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
frank@smithgardnerinc.com madeline@smithgardnerinc.com
Attachments
cc: Eric Foster – Avery County
Deb Aja – NCDEQ
file
H:\Projects\Avery County (NC)\Avery-15-1 (LFG Sys Ops)\2017 LFG Monitoring\2 Feb 2017\Avery Co MSW LFG Monitoring Rpt FEB 2017.docx
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G:\CAD\Avery County\Avery 13-6\sheets\AVERY-B0216.dwg - 12/3/2013 11:03 AM
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DATE:
BY:FAT
Date/Time CH4 CO2 O2 Balance Init. Temperature Init. Static
Pressure
Adj. Static
Pressure
Adj. Diff.
Pressure*Init. Flow Adj. Flow System
Pressure
mm/dd/yyyy %%%%deg F in H2O in H2O in H2O Scfm Scfm in H2O
AVERY-W1 2/23/2017 10:28 70.8 27.9 0.0 1.3 62 -34.5 -34.7 0.0 NR NR -34.2
AVERY-W2 2/23/2017 10:12 41.8 25.8 0.3 32.1 60 -34.9 -34.9 0.0 0.0 0.0 -34.5
AVERY-W3 2/23/2017 10:08 57.6 28.6 0.1 13.7 58 -35.4 -35.2 0.0 0.0 0.0 -34.7
AVERY-W4 2/23/2017 10:15 27.4 23.7 0.0 48.9 60 -34.4 -34.4 0.0 4.2 1.3 -34.8
AVERY-W5 2/23/2017 10:51 26.5 24.1 0.4 49.0 64 -33.4 -33.4 0.9 3.1 2.9 -34.2
AVERY-W6 2/23/2017 10:48 13.5 20.0 2.4 64.1 70 -7.3 -7.3 0.0 14.4 14.6 -34.1
AVERY-W7 2/23/2017 10:42 6.0 17.1 2.5 74.4 70 -1.0 -2.0 12.6 1.0 2.8 -34.5
AVERY-W7 2/23/2017 10:44 4.6 17.5 1.7 76.2 71 -2.9 -2.4 5.4 2.7 1.8 -34.2
AVERY-W8 2/23/2017 10:56 52.8 33.3 0.8 13.1 70 -34.0 -34.4 0.2 14.1 29.0 -33.9
AVERY-W9 2/23/2017 10:24 37.9 17.7 0.0 44.4 64 -34.9 -35.0 0.1 0.3 0.2 -34.9
AVERY-W10 2/23/2017 10:03 42.9 22.2 7.2 27.7 61 -35.1 -35.2 0.3 0.3 0.4 -34.9
AV-FLARE 2/23/2017 11:02 16.4 12.5 10.0 61.1 65 1.7 0.7 2.2 NR NR 0.1
NR= not recorded
Landfill Gas Collection and Control System Monitoring
February 2017
*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. Overpulling by adjacent extraction wells
may also result in negative pressure being displayed.
February 24, 2017
Avery County Closed MSW Landfill
TABLE 1
Device ID
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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
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
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
Attachment 2
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By:FAT
Date:2/24/2017
Avery County MSW LandfillLandfill Gas Monitoring Well Network
Methane Concetrations Between May 2011 and February 2017
0
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70
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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)
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