2019.05.20_CCO.p12.e_RemedialOptionsPlanCoverLetter

The Chemours Company
Fayetteville Works
22828 NC Highway 87 W
Fayetteville, NC 28306

May 20, 2019
Sheila Holman
Assistant Secretary for the Environment
1601 Mail Service Center
Raleigh, NC 27699-1601
[e-mail]

Re: Submission of Old Outfall 002 Remedial Options Plan Pursuant to Consent Order
Paragraph 12.e
Dear Ms. Holman,
Paragraph 12.e of the Consent Order requires Chemours to submit a plan within ninety
days of entry of the Consent Order that analyzes the following remedial options for Old Outfall
002: (1) capturing the dry weather flow at Location B (as shown in Attachment A of the Consent
Order) and treating the water prior to discharge; and (2) an alternative equivalent remediation
method. The enclosed Old Outfall 002 Remedial Options Plan, prepared by our contractor
Parsons, presents this analysis, as required under the Consent Order.

Three options are presented in the enclosed Plan: (1) capturing and treating the dry
weather flow at Location B; (2) installing an in-situ barrier using Regenesis PlumeStop™; or (3)
installing a hydraulic control (groundwater extraction and treatment) system upgradient of the
channel. All three options appear to be technically and administratively feasible (assuming that
all necessary approvals and permits are received in a timely fashion). Capturing and treating the
water at Location B is anticipated to be effective at removing PFAS constituents. Additional
studies are being conducted to estimate the effectiveness and the time required to reach the
remedial goals for the two alternative options.

Please let us know if you need further information, or if you would like to discuss these
options further with us. We would appreciate receiving your approval soon, so that we may
timely proceed with implementation.

Sincerely,

Brian D. Long
Plant Manager
Chemours – Fayetteville Works

2
Enclosure
Old Outfall 002 Remedial Options Plan

Cc:
William F. Lane, DEQ
Francisco Benzoni, NC DOJ
Michael Abraczinskas, DAQ
Michael Scott, DWM
Linda Culpepper, DWR
David C. Shelton, Chemours
John F. Savarese, WLRK
Kemp Burdette, CFRW
Geoff Gisler, SELC