3608_WMGastoniaTrans_SoilExcResp_DIN27622_20170410

April 10, 2017

Sent Via Email – [e-mail]

Mr. Shawn Carroll
Environmental Protection Manager
Waste Management
3920 River Road
Wilmington, NC 28411

Re: Soil Excavation and Confirmation Sampling Report
Gastonia Transfer Station
Permit ID # 3608-Transfer-1993
Gaston County
DIN 27622

Dear Mr. Carroll:

The Solid Waste Section (Section) has reviewed the Soil Excavation and Confirmation Sampling Report
report (DIN 27597) for the Gastonia Transfer Station prepared by Golder Associates NC, Inc. (Golder). A
leachate release was observed at the facility during an October 12, 2016 inspection, and Golder
subsequently submitted a Soil Sampling Plan (DIN 27265) to evaluate potential impact from the release.
During the November 22, 2016 sampling event, soil samples were collected from two background locations,
one location near the area where leaks were observed from the trailers, one location near the point of
confluence close to the parking area, and one location downgradient of a drainage feature. Soil analytical
results indicated elevated arsenic concentrations in samples collected from the trailer and confluence
locations.

Due to the elevated arsenic concentrations, a total of 103 tons of soil was excavated from the trailer and
confluence locations. Confirmatory soil samples were collected from the two areas after the excavation
was completed. The soil samples were analyzed for arsenic which was not detected above laboratory
reporting limits in either sample. Based on the lack of detections in the confirmatory samples, Golder
recommended no further action.

The Section approves of this recommendation and Waste Management is not required to conduct any
additional assessment or corrective measures related to the October 2016 leachate release at this time.
Please contact me at [phone] or by e-mail at [e-mail] if you have any questions or
concerns regarding this letter. Thank you in advance for your cooperation in this matter.

Sincerely,

Ervin Lane
Compliance Hydrogeologist
Solid Waste Section

cc: David Reedy II, P.G., Golder Associates NC, Inc.
Jason Watkins, Field Operations Branch Head – Solid Waste Section
Deb Aja, Western District Supervisor – Solid Waste Section
Kim Sue, Environmental Senior Specialist – Solid Waste Section
Jessica Montie, Compliance Officer – Solid Waste Section