3001_INSP_20230510

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De1.11.1 It o1 Enertunmenul Ouzlh
FACILITY COMPLIANCE INSPECTION REPORT
Division of Waste Management
Solid Waste Section
UNIT TYPE:
Lined
LCID
YW
Transfer
Compost
SLAS
COUNTY: Davie
MSWLF
PERMIT NO.: 30-01
Closed
X
HHW
White
Incin
T&P
FIRM
MSWLF
goods
FILE TYPE: COMPLIANCE
CDLF
TireT&P/
Tire
Industrial
DEMO
SDTF
Collection
Monofill
Landfill
Date of Site Inspection: 5-10-2023
FACILITY NAME AND ADDRESS:
Closed Davie County MSW Landfill
360 Dalton Road
Mocksville, NC 27028
Date of Last Inspection: 1-31-2017
GPS COORDINATES (decimal degrees): Lat.: 35.88087 Lon2.:-80.52135
FACILITY CONTACT NAME AND PHONE NUMBER:
Name: Johnny Lambert, Utilities Director
Telephone: [phone]
Email address: jlambert&daviecopn , nc. og_v
FACILITY CONTACT ADDRESS:
Same as above
PARTICIPANTS:
Johnny Lambert, Utilities Director
Edmund Henriques, Principal Geologist, S&ME
Kim Sue, NCDEQ — Environmental Senior Specialist — Solid Waste Section
STATUS OF PERMIT:
Closed MSW Landfill, Closure Letter dated May 30, 1995.
PURPOSE OF SITE VISIT:
Comprehensive Inspection
STATUS OF PAST NOTED VIOLATIONS:
None
OBSERVED VIOLATIONS:
A. 15A NCAC 13B .1627(d)(1)(C) Post -closure criteria states: "(1) Following closure of each MSWLF unit, the owner or
operator shall conduct post -closure care. Post -closure care shall be conducted for 30 years, except as provided under
Subparagraph (2) of this Paragraph, and consist of the following: " and "(C) maintaining and operating the gas monitoring
system in accordance with the requirements of Rule .1626 of this Section; and "
15A NCAC 13B .1626(4) states that: "Explosive gases control. (a) Owners or operators of MSWLF units shall ensure
that:
(i) the concentration of explosive gases generated by the facility does not exceed 25percent of the lower explosive
limit in on -site facility structures, excluding gas control or recovery system components; and
(ii) the concentration of explosive gases does not exceed the lower explosive limit at the facility property boundary. "
Eighteen of the landfill gas monitoring events conducted between October 18, 2018 and March 24, 2023, showed
that LFG-1 had methane exceedances of the regulatory limit of 5% LEL for property boundary monitoring. The
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FACILITY COMPLIANCE INSPECTION REPORT
Division of Waste Management
Solid Waste Section
exceedances ranged from 6.2% to 60.5% methane by volume.
Continue to work with Elizabeth Werner, Permitting Hydrogeologist with the Solid Waste Section on
required actions to address methane exceedances. Compliance will be achieved when methane levels are
maintained within the regulatory limit.
The item(s) listed above were observed by Section staff and require action on behalf of the facility in order to come into or maintain compliance
with the Statutes, Rules, and/or other regulatory requirements applicable to this facility. Be advised that pursuant to N.C.G.S. 130A-22, an
administrative penalty of up to $15,000 per day may be assessed for each violation of the Solid Waste Laws, Regulations, Conditions of a Permit,
or Order under Article 9 of Chapter 130A of the N.C. General Statutes. Further, the facility and/or all responsible parties may also be subject to
enforcement actions including penalties, injunction from operation of a solid waste management facility or a solid waste collection service and any
such further relief as may be necessary to achieve compliance with the North Carolina Solid Waste Management Act and Rules.
ADDITIONAL COMMENTS
1. The facility operated as a municipal solid waste landfill and ceased receiving waste in 1994.
2. The entrance to the facility from Dalton Road is secured with a gate to prevent unauthorized access.
3. Edge of waste markers were in place and visible along the perimeter of the landfill.
4. The landfill had good vegetative cover. The landfill cap was not inspected for any erosion issues, depressions and
leachate seeps due to the tall established vegetative cover. Facility staff stated that mowing of the landfill cap is
scheduled within the next couple of months. Upon completion, an additional inspection will be performed of the
landfill.
5. During the inspection a few small trees were observed on the cap. Mr. Lambert stated the trees would be removed
when the landfill is mowed.
6. The trees that were observed growing on the cap over waste during the January 31, 2017, have been removed in
accordance with the approved Post -Closure Maintenance Plan - Revision 01.
7. During the inspection conducted on January 31, 2017, it was discovered that a Gas Remediation Plan had not been
submitted to the Section. On May 30, 2017, S&ME submitted to the Section a Landfill Gas Monitoring Plan for the
closed MSWLF and the closed C&D landfill. The Section approved the plan on July 11, 2017.
8. Quarterly methane monitoring reports were reviewed for sampling events conducted between October 2017 to
March 2023. Exceedances were noted for LGF-1 on: October 18, 2018, October 22, 2018, November 7, 2018,
November 19, 2018, November 27, 2018, December 13, 2018, January 8, 2019, February 25, 2019, April 1, 2019,
August 16, 2019, November 15, 2019, January 28, 2020, April 3, 2020, September 16, 2020, February 24, 2021,
June 8, 2022, December 20, 2022, and March 24, 2023. Please see the Observed Violations section of this report.
9. On October 18, 2018, an exceedance of the lower explosive limit (LEL) for methane (5% by volume) was first
detected at monitoring location, LFG-1, which is located adjacent to the property boundary. S&ME notified
NCDEQ in writing of the findings and presented a plan for the collection of additional landfill gas readings.
10. On May 15, 2019, S&ME submitted to the Section a Landfill Gas Passive Vent Installation Work Plan.
11. On November 13, 2019, three Passive Landfill Gas Vents (PLFGV) wells were installed to relieve/reduce the
subsurface migration of methane gas from the landfill toward the property boundary.
12. On February 24, 2023, an additional monitoring point, LFG-5 was installed on the adjacent firing range property to
evaluate the migration of landfill gas. LFG-5 was installed approximately 104 feet to the southeast of LFG-1.
13. Facility stated that the 2" Quarter 2023 gas monitoring will be conducted in early June.
14. Semi-annual ground water monitoring reports were reviewed for sampling events conducted between October 2017
to April 2022.
15. A random inspection of ground water and landfill gas monitoring wells was conducted. The following table list the
monitoring wells and any deficiencies observed during the inspection that require attention:
Well Number
Lock
Tag
Condition of Concrete Pad
LFG-1
Yes
Yes
Good
MW-21
Yes
Yes
Good
MW-21
Yes
Yes
Good
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Ilcuxnmm�t o1 EnvnunmonuI puzlh
FACILITY COMPLIANCE INSPECTION REPORT
Division of Waste Management
Solid Waste Section
MW-16D
Yes
Yes
Good
MW-16S
Yes
Yes
Good
MW-19S
Yes
Yes
Good
MW-19D
Yes
Yes
Good
MW-3
Yes
Yes
Good
Please contact me if you have any questions or concerns regarding this inspection report.
DN; cn=Kim e e, Kim Sue
DN: cn=Kim Sue, —Division of Waste
Management, ou=Solid Waste Section,
email=[e-mail], c=US
Date: 2023.05.2411:52:23-04'00'
Kim Sue
Environmental Senior Specialist
Regional Representative
Phone: [phone]
Sent to: Johnny Lambert
X
Email
Hand delivery
US Mail
Certified No. 11
5/24/2023
Copies: Deb Aja, Western District Supervisor - Solid Waste Section
Elizabeth Werner, Permitting Hydrogeologist
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