9502_WataugaCoMSW_March2018_LFGResults_FID1088646_20180330

1
Werner, Elizabeth
From:Don Marickovich <[e-mail]>
Sent:Friday, March 30, 2018 9:38 AM
To:Werner, Elizabeth
Cc:'[e-mail]' ([e-mail]); Karen Weber
Subject:[External] EMO - 18 0330 - Werner (NCDEQ) - Watauga County Landfill - 1st Quarter 2018 Gas
Monitoring Event - Notification of an Out of Compliance Probe
Attachments:XLS - 18 0329 - Watauga County Methanes Since 2011.pdf
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Hi Elizabeth, 

I work with Karen Weber here at Draper Aden Associates, and we do the gas probe monitoring at the Watauga County 
landfill. 

Yesterday, March 29th, we completed the first quarter gas monitoring event at the landfill.  We found methane in probe 
2 at levels above the 5% compliance level. 

Attached is a table that presents the methane concentrations in probes 1 and 2 since 2011. During this event, the 
concentrations in % by volume in probe 2were, from shallowest to deepest, 14.6, 20.7, 27.8, and 37.5. 

Probe 2 has occasionally been above the limit in the past, the last time was in 2011.  Typically, effective operation of the 
active gas system has been able to keep the probe in compliance as you can see from the table. Draper Aden Associates 
and the County consider that continuous operation of the active gas system will bring the probe back into compliance as 
it has in the past.  We do not consider this exceedance to be a threat to human health. 

The County will continue to operate the active system and will initiate monthly monitoring of probe 2, which will 
continue until the probe is in compliance for three consecutive months. 

Regards, 

Don 

Don Marickovich, P.E.
Senior Design Engineer

Draper Aden Associates
Engineering • Surveying • Environmental Services
Lasting Positive Impact™

Phone: [phone] • Direct Line: 540.557.1372 • Mobile [phone]

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P:\06\500\06520\06520-27\Gas Field Data\Spreadsheets\WATCO.XLS
Table 2
WATAUGA COUNTY LANDFILL
Steady State Methane Concentrations (%vol)
Probe Depth Methane Concentrations (in % by Volume)
(ft.)1/17/2011 4/5/2011 5/5/2011 6/7/2011 7/5/2011 11/7/2011 1/11/2012 5/1/2012 7/6/2012 12/5/2012 1/9/2013 4/18/2013 7/10/2013 11/12/2013
1R 0 - 5 0 0 NR NR 0 0 0 0 0 0 0 0 0 0
1Y 5 - 10 0 0 NR NR 0 0 0 0 0 0 0 0 0 0
1B 10 - 20 0 0 NR NR 0 0 0 0 0 0 0 0 0 0
1G 20 - 40 0 0 NR NR 0 0 0 0 0 0 0 0 0 0
2R 0 - 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2Y 5 - 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2B 10 - 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2G 20 - 40 0 6.5 0 0 0 0 0 0 0 0 0 0 0 0
NM = Not monitored.
Table 2
WATAUGA COUNTY LANDFILL
Steady State Methane Concentrations (%vol)
Probe Depth Methane Concentrations (in % by Volume)
(ft.)2/5/2014 5/1/2014 8/5/2014 11/4/2014 2/12/2015 5/26/2015 8/5/2015 11/4/2015 2/3/2016 4/6/2016 7/6/2016 11/10/2016 3/1/2017 6/27/2017
1R 0 - 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1Y 5 - 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1B 10 - 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1G 20 - 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2R 0 - 5 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2Y 5 - 10 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2B 10 - 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2G 20 - 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0
LCID TP-1 0 - 7 0 0 0 0 0 0 0 0 0 0 0 0
NM = Not monitored.
Table 2 - Continued
WATAUGA COUNTY LANDFILL
Steady State Methane Concentrations (%vol)
Probe Depth Methane Concentrations (in % by Volume)
(ft.)8/3/2017 10/4/2017 3/29/2018
1R 0 - 5 0 0 0
1Y 5 - 10 0 0 0
1B 10 - 20 0 0 0
1G 20 - 40 0 0 0
2R 0 - 5 0 0 14.6
2Y 5 - 10 0 0 20.7
2B 10 - 20 0 0 27.8
2G 20 - 40 0 0 37.5
LCID TP-1 0 - 7 0 0 0
NM = Not monitored.