10047_Atherton Mill VMP Unit 120 20150601

 
Correspondence:
Amec Foster Wheeler Environment & Infrastructure, Inc.
1308 Patton Avenue
Asheville, North Carolina 28806
Tel [phone]
NC Engineering License No. F-1253

June 1, 2015

Ms. Carolyn Minnich, Brownfields Project Manager
North Carolina Department of Environment and Natural Resources
Division of Waste Management
Brownfields Program
1646 Mail Service Center
Raleigh, North Carolina 27699-1646

Subject: Vapor Mitigation Plan
Atherton Mill Property Unit 120
Vin Master
2000 South Boulevard
Charlotte, Mecklenburg County, North Carolina
Brownfields Project Number: 10047-06-60
Amec Foster Wheeler Project: 6228-12-0051

Dear Ms. Minnich:

On behalf of Atherton Mill (E&A), LLC (Owner), Amec Foster Wheeler is pleased to provide this
Vapor Mitigation Plan for Unit 120 at the Atherton Mill property in Charlotte, North Carolina. This
vapor mitigation plan was prepared in response to the recent indoor air quality (IAQ) data
collected on April 27, 2015, and presented in our Second Report of Post-Mitigation IAQ
Assessment (dated May 26, 2015).

Proposed Vapor Mitigation Plan 
Phase 1: This phase is intended to help determine the source of the TCE identified in the
basement and the Unit 120 space. The phase will consist of:
- Replace the existing door from Unit 120 to the basement with an exterior door with seals.
- Seal all cracks and other penetrations in the wall separating Unit 120 from the stairway
to the basement.
- Seal all joints and penetrations in the floor in Unit 120.
- Remove the in-floor Toledo scale in Unit 120 and implement a corrective plan to seal this
area (the corrective plan will be developed once the scale is removed and existing
conditions are evaluated)
- One week following completion of the above actions, collect IAQ samples at same
locations as those collected on April 27, 2015.