HomeMy WebLinkAbout0601_AveryCountyLandfill_MSWLF_September2015_GW_GroundwaterMonitoring Report.pdf
November 10, 2015
Ms. Jaclynne Drummond
NCDENR DWM Solid Waste Section
2090 U.S. 70 Highway
Swannanoa, North Carolina 28778-8211
RE: Operations, Monitoring, and Maintenance Report – October 2015
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) and monitoring of the on- and off-site landfill gas
probes for the October 2015 monitoring period. Mr. Spencer Hollomon with S+G performed
the site visit on October 1, 2015. 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
S+G personnel performed the flare station and well field monitoring on October 1st, 2015.
Initial measurements indicated there was approximately 26 inches of available vacuum
average throughout the well field, ranging from approximately 26 to 27 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
November 10, 2015
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 adjustments were made to the extraction well
heads during this monitoring 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 October 2015 site visit and
the liquid level was found to be at an acceptable level. S+G will continue to
monitor the liquid level of the filter tank.
Flare operation: The flare was off when S+G arrived on-site, however the spark
was working. 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. Hollomon performed monitoring of the perimeter LFG monitoring network during this
event. Monitoring well P3 measured 5.4% by volume of CH4, which is over the 100% Lower
Explosive Limit (LEL); wells P1, P7, and P13 measured 0.4%, 0.7%, and 1.1%, respectively, by
volume of CH4. All 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 NCDENR and the County.
CONCLUSIONS
Currently only P-3 has CH4 concentrations that exceed the LEL. This is an increase from
recent events. We will continue to monitor the CH4 concentrations at the site monthly.
The next routine monitoring event is scheduled for the second week of November 2015. 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).
Ms. Dr
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Page 3
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DATE:
BY:SWH
DataField - GEM Mode Data Output
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 10/1/2015 10:14 70.4 29.6 0 0 78 -26.83 -26.85 0.004 2.1 2.2 -27.2
AVERY-W2 10/1/2015 9:25 52 29.9 0.1 18 79 -26.21 -26.18 0.013 3.6 4.1 -26.17
AVERY-W3 10/1/2015 9:49 67.9 32.1 0 0 78 -26.09 -26.14 -0.002 <<>><<>>-26.03
AVERY-W4 10/1/2015 13:12 25.7 26.2 0.5 47.6 79 -23.21 -23.18 0.012 3.8 3.5 -26.8
AVERY-W5 10/1/2015 11:24 29.4 26.5 0.1 44 81 -25.32 -25.29 0.682 2.6 2.6 -26.14
AVERY-W6 10/1/2015 11:17 8.3 19.8 2.3 69.6 80 -6.58 -6.58 0.007 7 4.9 -26.06
AVERY-W7 10/1/2015 11:07 9.3 22.2 1.1 67.4 80 -12.85 -12.84 <<>>N/A N/A -26.12
AVERY-W8 10/1/2015 11:38 9 20.1 3.2 67.7 80 -24.11 -24.09 0 2.2 1 -26.7
AVERY-W9 10/1/2015 9:57 27.2 26.4 0.4 46 78 -26.03 -26 0.153 1 1.2 -25.89
AveryW10 10/1/2015 9:31 63.6 36.4 0 0 77 -26.21 -26.22 0.008 0.2 0.3 -26.24
Av-Flare 10/1/2015 11:44 15.7 14.8 7.3 62.2 NA 2.6 2.58 2.539 36 35.1 N/A
<<>> = measurement out of range of GEM 2000 meter. The reading was likely too low for measurement by the instrument.
Landfill Gas Collection and Control System Monitoring
September 2015
*The differential pressure measurement should be positive. A negative differential pressure indicates no gas flow. Negative
differential pressure may be he result of dirt or water obstructing the pitot tube perforations. Overpulling by adjacent extractions
wells may also result in negative pressure being displayed.
October 21, 2015
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:DMM
Updated by:SWH
Date:10/21/2015
Methane Concetrations Between May 2011 and October 2015
Landfill Gas Monitoring Well Network
Avery County MSW Landfill
0
10
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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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