8401_CityofAlbemarleMSWLF_LeachateAssmtResp_DIN28453_20170819

September 19, 2017

Sent Via Email – [e-mail]

Ms. Nina Underwood
City of Albemarle
40592B Stony Gap Road
Albemarle, NC 28001

Re: Response and Cleanup Report – Leachate Spill
City of Albemarle Landfill
Solid Waste Permit Number 8401-MSWLF-1999
DIN 28453

Dear Ms. Underwood:

The Solid Waste Section (Section) has completed a review of the Response and Cleanup Report – Leachate
Spill (DIN 28452) submitted on behalf of The City of Albemarle by Shield Engineering, Inc. (Shield) for the
City of Albemarle Landfill, Solid Waste Permit Number 8401. The report was submitted in response to a
release that occurred while leachate was being pumped from the leachate collection pond to a tanker
truck.

The City of Albemarle’s leachate collection system drains leachate from the landfill cells into a leachate
collection pond. Leachate from the pond is pumped into a tanker truck and later discharged into the City
of Albemarle’s sewer system. While leachate was being pumped into the tanker truck on July 31, 2017, a
timer malfunction occurred causing leachate to continue being pumped after the tanker truck reached
capacity. As a result, an estimated 1,200 gallons of leachate was released in the immediate vicinity of the
leachate lagoon and well pump station. Shield identified areas impacted by the release to be a 124-foot
section of the access road, a reinforced concrete pipe (RCP) inlet area on the western side of the access
road, and the RCP outlet area on the eastern side of the access road.

Shield subsequently excavated approximately two to four inches of soil from the access road, but
confirmatory soil samples could not be collected due to the access road’s compaction and hardness.
However, Shield did not observe any moist or leachate impacted soils after the road excavation was
completed. Approximately one foot of soil was excavated from the RCP inlet area and six inches of soil
was excavated from the RCP outlet area. One post excavation soil sample collected in RCP inlet area and
10 samples from the RCP outlet area were analyzed for volatile organic compounds by EPA Method
8260/5030A. Styrene was the only constituent reported above laboratory reporting limits at a
concentration of 0.009mg/kg in sample SB-1 from the RCP outlet area. The reported concentration is less
than the Inactive Hazardous Sites Branch Preliminary Residential Soil Remediation Goal (PSRG) of 870
mg/kg and the Protection of Groundwater PSRG of 0.92 mg/kg.

Based on the results of the assessment presented in the report, the Section will not require additional
assessment and/or remedial activities related to the July 2017 leachate release. If you have any questions
or concerns regarding this letter, please feel free to contact me by email at [e-mail] or by
phone at 919.707.8288. Thank you for your continued cooperation with this matter.

Sincerely,

Ervin Lane
Compliance Hydrogeologist
Solid Waste Section, Division of Waste Management
NCDEQ

cc sent via email: David Wallace, P.E., Shield Engineering, Inc.
Jason Watkins, Field Operations Branch Head
Deb Aja, Western District Supervisor
Teresa Bradford, Environmental Senior Specialist
Ed Mussler, P.E., Permitting Branch Head
Perry Sugg, P.G., Permitting Hydrogeologist
Ming Chao, P.E., Permitting Engineer