20190752 Ver 3_401 Application_20200603

DWR
Division of Water Resources
Pre -Construction Notification (PCN) Form
April 11, 2020 Ver 3.1
Initial Review
Has this project met the requirements for acceptance in to the review process?*
r Yes
r No
Is this project a public transportation project?*
C Yes r No
Change only if needed.
BIMS # Assigned
20190752
Is a payment required for this project?*
r No payment required
r Fee received
r Fee needed - send electronic notification
Reviewing Office *
Fayetteville Regional Office - [phone]
Information for Initial Review
1a. Name of project:
Chemours - Flow -through Cells
1a. Who is the Primary Contact?*
Christel E. Compton
1b. Primary Contact Email:*
[e-mail]
Date Submitted
6/3/2020
Nearest Body of Water
Cape Fear River
Basin
Cape Fear
Water Classification
WS-IV
Version#*
3
What amout is owed?*
r $240.00
r $570.00
Select Project Reviewer*
Chad Turlington:eads\ccturlington
1c. Primary Contact Phone:*
[phone]
Site Coordinates
Latitude: Longitude:
34.845544-78.825891
A. Processing Information U
County (or Counties) where the project is located:
Bladen
Is this a NCDMS Project
r Yes r No
Is this project a public transportation project?*
r Yes r No
1a. Type(s) of approval sought from the Corps:
W Section 404 Permit (wetlands, streams and waters, Clean Water Act)
r Section 10 Permit (navigable waters, tidal waters, Rivers and Harbors Act)
1b. What type(s) of permit(s) do you wish to seek authorization?

W Nationwide Permit (NWP)
r Regional General Permit (RGP)
r Standard (IP)
1c. Has the NWP or GP number been verified by the Corps?
r Yes r No
Nationwide Permit (NWP) Number:
NWP Numbers (for multiple NWPS):
NWP-38 Hazmat Clean-up
1d. Type(s) of approval sought from the DWR:
W 401 Water Quality Certification - Regular
r Non-404 Jurisdictional General Permit
r Individual Permit
38 - Hazmat Clean -Up
le. Is this notification solelyfor the record because written approval is not required?
For the record onlyfor DWR 401 Certification:
For the record onlyfor Corps Permit:
F- 401 Water Quality Certification - E)press
r Riparian Buffer Authorization
1f. Is this an after -the -fact permit application?*
r Yes r No
1g. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation of impacts?
r Yes r No
1g. Is payment into a mitigation bank or in -lieu fee program proposed for mitigation of impacts?
r Yes r No
Acceptance Letter Attachment
1h. Is the project located in any of NC's twenty coastal counties?
r Yes r No
1j. Is the project located in a designated trout watershed?
r Yes r No
B. Applicant Information
1d. Who is applying for the permit?
r Owner W Applicant (other than owner)
le. Is there an Agent/Consultant for this project?*
r Yes r No
2. Owner Information
2a. Name(s) on recorded deed:
Chemours Company - Fayetteville Works Facility
2b. Deed book and page no.:
2c. Responsible party:
The Chemours Company - Fayetteville Works
2d.Address
Street Address
22828 NC Highway 87 W
Address Line 2
city
Fayetteville
Postal / Zip Code
28306-7332
2e. Telephone Number:
[phone]
2g. Email Address:*
[e-mail]
State / Province / Ifgion
North Carolina
Country
USA
2f. Fax Number:
r- Yes r No
r Yes r No
3. Applicant Information (if different from owner)

3a. Name:
Christel E. Compton
3b. Business Name:
The Chemours Company - Fayetteville Works
3c.Address
Street Address
22828 NC Highway 87 W
Address Line 2
City
Fayetteville
Postal / Zip Code
28306-7332
3d. Telephone Number:
[phone]
3f. Email Address:*
[e-mail]
4. Agent/Consultant (if applicable)
4a. Name:
Luke F. Eggering
4b. Business Name:
Parsons
4c.Address
Street Address
530 Maryville Centre Drive
Address tine 2
Suite 400
City
St. Louis
Postal / Zip Code
63141
4d. Telephone Number:
[phone]
4f. Email Address:*
[e-mail]
Agent Authorization Letter*
Agent Authorization - signed - Preconstruction Notification Seeps.pdf
State / Province / F bgion
North Carolina
Country
USA
3e. Fax Number:
State / Province / Region
Missouri
Country
USA
4e. Fax Number:
210.79KB
C. Project Information and Prior Project History C^U
1. Project Information
1b. Subdivision name:
frf appropriate)
1c. Nearest municipality/ town:
Fayetteville, NC 28306
2. Project Identification
2a. Property Identification Number:
2b. Property size:
18528
2,150
2c. Project Address
Street Address
22828 NC 87
Address Une 2
City
State / Province / F3gion
Fayettevile
NC
Postal / Zip Code
Country
28306
USA
3. Surface Waters
3a. Name of the nearest body of water to proposed project:*

Cape Fear River
3b. Water Resources Classification of nearest receiving water:*
WS-IV
3c. What river basin(s) is your project located in?*
Cape Fear
3d. Please provide the 12-digit HUC in which the project is located.
Willis Creek -Cape Fear River 030300050102
4. Project Description and History
4a. Describe the existing conditions on the site and the general land use in the vicinity of the project at the time of this application:*
On February 25, 2019, the North Carolina Superior Court for Bladen County entered a Consent Order (CO) among The Chemours Company FC, LLC (Chemours) and the State of NC
and Cape Fear River Watch to address discharges of perfluoroalkyl and polyfluoroalkyl substances (PFAS) at the Chemours Fayetteville Works. Among other things, the CO required
Chemours to develop a remedial plan for reducing PFAS loading from Chemours Fayetteville Work Facility to the Cape Fear River. Chemours is developing four flow -through cell
instream treatment facilities to treat the water prior to discharge into the Cape Fear River. The treatment flow -through cells will involve the installation of an in -stream system to remove
PFAS contaminants from the surface water at the seeps. The in -situ remedial technology involves the installation of sheet pile walls to guide seep water discharge through a controlled
structure for on -location treatment. Large wire baskets (gabions) filled with a sorbent material will be installed in the discharge structures such that the water discharging from each seep
location will flowthrough the sorbent-filled gabions. The PFAS compounds in the seep water will be sorbed by the sorbent material in the gabions and the treated water, containing
much lower concentrations of PFAS compounds, will flow out the downhill side of the gabions. Influent and effluent samples wIl be collected to monitor the PFAS removal efficiency and
to determine when the sorbent material requires replacement. The occasional replacement of gabion baskets will be performed using a crane to lift the baskets out of the channel and
install new baskets containing fresh sorbent. The seep treatment remedies will be maintained as long as needed to protect human health and the environment.
4b. Have Corps permits or DWR certifications been obtained for this project (including all prior phases) in the past?*
r Yes r No r Unknown
4c. If yes, please give the DWR Certification number or the Corps Action ID (exp. SAW-0000-00000).
SAW-2019-00206; DWR#19-0752 and DWR#19-0752 v2
Project History Upload
Chemours Water Flow Monitoring V2.docxpdf
SAW-2019-00206 NWP 38 Old Ouffall 002.pdf
736KB
1.63MB
4d. Attach an 8 1/2 X 11 excerpt from the most recent version of the USGS topographic map indicating the location of the project site. (for DWR)
USGS Excerpt Duart quad.pdf
364.46KB
4e. Attach an 8 1/2 X 11 excerpt from the most recent version of the published County NRCS Soil Survey map depicting the project site. (for DWR)
Chemours NRCS Soil Map.pdf 1.43MB
4f. List the total estimated acreage of all existing wetlands on the property:
Greater than 10 acres
4g. List the total estimated linear feet of all existing streams on the property:
Greater than 2,000 feet
4h. Explain the purpose of the proposed project:*
Chemours will construct four instream flow -through cell structures in four unnamed tributaries east of the Fayetteville Works Facility in the Cape Fear River floodplain. Release of per -
and polyfluoroalkyl substances (PFAS) from the Chemours Company FC, LLC Fayetteville Works Facility to the Cape Fear River are derived from impacted groundwater discharging to
surface water as seeps. Four groundwater seeps that form streams, identified as Seeps A, B, C and D, are located above the Cape Fear River water level on the bluff face from the
facility and discharge into the Cape Fear River. The seep treatment remedies will be maintained as long as needed to protect human health and the environment.
41. Describe the overall project in detail, including indirect impacts and the type of equipment to be used:*
The treatment flow -through cells will involve the installation of an in -stream system to remove PFAS contaminants from the surface water at the seeps. The in -situ remedial technology
involves the installation of sheet pile walls to guide seep water discharge through a controlled structure for on -location treatment. Large wire baskets (gabions) filled with a sorbent
material will be installed in the discharge structures such that the water discharging from each seep location will flow through the sorbent-filled gabions. The PFAS compounds in the
seep water will be sorbed by the sorbent material in the gabions and the treated water, containing much lower concentrations of PFAS compounds, Will flow out the downhill side of the
gabions. Influent and effluent samples will be collected to monitor the PFAS removal efficiency and to determine when the sorbent material requires replacement. The occasional
replacement of gabion baskets will be performed using a crane to lift the baskets out of the channel and install new baskets containing fresh sorbent. The seep treatment remedies will
be maintained as long as needed to protect human health and the environment.
4j. Please upload project drawings for the proposed project.
Chemours flow -through cell project plans - final 449338 COMBINED 20200603.pdf 11.32MB
5. Jurisdictional Determinations
5a. Have the wetlands or streams been delineated on the property or proposed impact areas?*
r Yes
r No
Comments:
A WOTUS Report was prepared following a May 18-19, 2020 Field Survey. The report and
appendices are attached below.
5b. If the Corps made a jurisdictional determination, what type of determination was made?*
r Preliminary r Approved r Not Verified r Unknown r N/A
Corps AID Number:
r Unknown

5c. If 5a is yes, who delineated the jurisdictional areas?
Name (if known): Luke F. Eggering, SPWS
Agency/Consultant Company: Parsons
Other:
5d1. Jurisdictional determination upload
Appendix B Chemours flow -through cells wetland photos and data sheets.pdf
Appendix C Chemours flow -through cells stream data sheets and photos.pdf
2020-05-28 RPT Chemours WOTUS Flow -through Cells DRAFT V1.pdf
6. Future Project Plans
6a. Is this a phased project?*
r Yes O No
12.23MB
19.64MB
1.73MB
7b. If yes, explain.
Release of per- and polyfluoroalkyl substances (PFAS) from the Chemours Company FC, LLC Fayetteville Works Facility to the Cape Fear River are derived from impacted
groundwater discharging to surface water as seeps. Four groundwater seeps that form streams, identified as Seeps A, B, C and D, are located above the Cape Fear River water level
on the bluff face from the facility and discharge into the Cape Fear River. The treatment flow -through cells will involve the installation of an in -stream system to remove PFAS
contaminants from the surface water at the seeps. The in -situ remedial technology involves the installation of sheet pile walls to guide seep water discharge through a controlled
structure for on -location treatment. Large wire baskets (gabions) filled With a sorbent material will be installed in the discharge structures such that the water discharging from each seep
location will flow through the sorbent-filled gabions. The PFAS compounds in the seep water will be sorbed by the sorbent material in the gabions and the treated water, containing
much lower concentrations of PFAS compounds, will flow out the downhill side of the gabions. Influent and effluent samples Will be collected to monitor the PFAS removal efficiency and
to determine when the sorbent material requires replacement. The occasional replacement of gabion baskets will be performed using a crane to lift the baskets out of the channel and
install new baskets containing fresh sorbent. The seep treatment remedies will be maintained as long as needed to protect human health and the environment. Additional measures to
treat for PFAS are currently being developed.
Are any other NWP(s), regional general permit(s), or individual permits(s) used, or intended to be used, to authorize any part of the proposed project or related activity?
A larger PFAS groundwater treatment plan is being developed. All future work is envisioned to be performed under NAP 38.
D. Proposed Impacts Inventory
u
1. Impacts Summary
la. Where are the impacts associated with your project? (check all that apply):
W Wetlands W Streams -tributaries
r Buffers
r Open Waters r Pond Construction
2. Wetland Impacts
2a1 Reason (?)
2b. Impact type * (?)
2c. Type of W.*
2d. W. name *
2e. Forested*
2f. Type of
Jurisdicition*(?)
2g. Impact
area*
Seep B Fringe
flow through cell
P
Seep
Seep B unnamed Trib to
No
Both
0.007
Cape Fear River
(acres)
Seep B Temp
culvert, access road
T
mland Hardwood Forest
ff
Seep B Trib to unnamed
Both
0.060
Trib to Cape Fear River
(acres)
Seep C Fringe
flow -through cell
P
ff
Seep C unnamed Trib
Both
0.006
to Cape Fear River
(acres)
Seep D Fringe
flow -through cell
P
Seep
Seep D unnamed Trib
�_]
Both
]
0.009
to Cape Fear River
(acres)
2g. Total Temporary Wetland Impact 2g. Total Permanent Wetland Impact
0.060 0.022
2g. Total Wetland Impact
0.082
2h. Comments:
The project areas were cleared of trees to comply with the USFWS Northern long-eared bat clearing restrictions (i.e. cleared prior to the June 1-
August 31 restriction). Therefore, the columns for "Forested" above are checked "no." The delineated areas were: Seep B = 0.062; Seep B temporary
crossing = 0.465; Seep C = 0.064; and Seep D - 0.105.
3. Stream Impacts
3a. Reason for impact (?) 3b.lmpact type" 3c. Type of impact" 3d. S. name" 3e. Stream Type 3f. Type of 3g. S. width 3h. Impact
(?) Jurisdiction* i length*

S1
See A Stream
P
Permanent
Other
See A Unnamed Trib of
P
Perennial
Both
8
50
Cape Fear River
Average (feet)
(lir�rfeet)
S2
Seep B Stream
Permanent
Other
See B Unnamed Trib to
P
Perennial
Both
5
50
Cape Fear River
Average (feet)
(linearfeet)
S3
See C Stream
P
Permanent
Other
See C Unnamed Trib to
P
Perennial
Both
5
50
Cape Fear River
Average (feet)
(lines fe&)
S4
See D Stream
P
Permanent
Other
See D Unnamed Trib to
P
Perennial
Both
8
50
Cape Fear River
Average (feet)
(lirrfeet)
31. Total jurisdictional ditch impact in square feet:
31. Total permanent stream impacts:
200
31. Total stream and ditch impacts:
200
31. Total temporary stream impacts:
3j. Comments:
The impacts are listed as permanent, however when a larger PFAS treatment approach is developed, the instream flow -through cell gabbions will be
removed. All of the streams/seeps are small perennial streams that are fed by groundwater, conveyances for stormwater, and are subject to
backwater overflow Flooding from the Cape Fear River. One ephemeral channel (a small excavated ditch) is discussed in the WOTUS Report. It would
be part of a wetland, and it would not be regulated as a stream.
E. Impact Justification and Mitigation
1. Avoidance and Minimization
1a. Specifically describe measures taken to avoid or minimize the proposed impacts in designing the project:
The flow -through cell locations were purposefully positioned to be in narrow sections of the streams, and they were intentionally located in areas to
avoid/minimize direct impacts to fringe wetlands. Also the position of the access road to Seep B equipment site avoids a permanent stream and
minimizes the impact to the Seep B Temporary Crossing Wetland.
1b. Specifically describe measures taken to avoid or minimize the proposed impacts through construction techniques:
Wetlands will be on all project plans and flagged in the field.
2. Compensatory Mitigation for Impacts to Waters of the U.S. or Waters of the State
2a. Does the project require Compensatory Mitigation for impacts to Waters of the U.S. or Waters of the State?
r Yes r No
2b. If this project DOES NOT require Compensatory Mitigation, explain why:
The overall impacts to WOTUS are very small (0.082 acres of wetlands and 200 feet of stream), and the project is a net benefit to water quality by reducing PFAS to the Cape Fear
River.
F. Stormwater Management and Diffuse Flow Plan (required by DWR)
1. Diffuse Flow Plan
1a. Does the project include or is it adjacent to protected riparian buffers identified within one of the NC Riparian Buffer Protection Rules?
r Yes r No
If no, explain why:
The impacts will be minimal.
2. Stormwater Management Plan
2a. Is this a NCDOT project subject to compliance with NCDOT's Individual NPDES permit NCS000250?*
r Yes r No
2b. Does this project meet the requirements for low density projects as defined in 15ANCAC 02H .1003(2)?
r Yes r No
Comments:
The NPDES plan and subsequent Stormwater Pollution Prevention Plan (SWPPP) is being developed for the project.
G. Supplementary Information
1. Environmental Documentation
la. Does the project involve an expenditure of public (federal/state/local) funds or the use of public (federal/state) land?"
r Yes r No

2. Violations (DWR Requirement)
2a. Is the site in violation of DWR Water Quality Certification Rules (15A NCAC 2H .0500), Isolated Wetland Rules (15A NCAC 21-1.1300), or DWR Surface Water or Wetland Standards or
Riparian Buffer Rules (15A NCAC 2B .0200)? *
r Yes r No
3. Cumulative Impacts (DWR Requirement)
3a. Will this project result in additional development, which could impact nearby downstream water quality?*
r Yes f• No
3b. If you answered "no," provide a short narrative description.
The flow -through cell phase of the project is an interim step in the larger PFAS groundwater treatment strategy for Chemours.
4. Sewage Disposal (DWR Requirement)
4a. Is sewage disposal required by DWR for this project?*
r Yes r No r N/A
5. Endangered Species and Designated Critical Habitat (Corps Requirement)
5a. Will this project occur in or near an area with federally protected species or habitat?*
r Yes r No
5b. Have you checked with the USFWS concerning Endangered Species Act impacts?*
r Yes r No
5c. If yes, indicate the USFWS Field Office you have contacted.
Raleigh
5d. Is another Federal agency involved?*
r Yes r No
5e. Is this a DOT project located within Division's 1-8?
r Yes r No
5f. Will you cut any trees in order to conduct the work in waters of the U.S.?
r Yes r No
5g. Does this project involve bridge maintenance or removal?
r Yes r No
5h. Does this project involve the construction/installation of a wind turbine(s)?`
r Yes r No
C Unknown
51. Does this project involve (1) blasting, and/or (2) other percussive activities that will be conducted by machines, such as jackhammers, mechanized pile drivers, etc.?
r Yes r No
5j. What data sources did you use to determine whether your site would impact Endangered Species or Designated Critical Habitat?
The trees near the flow -through cells were cleared in the winter/early spring of 2020 to comply with the NLEB restrictions of clearing during the pup
season. Therefore, question 5f is answered "no," because the trees have already been cleared.
Consultation Documentation Upload
Chemours INC Official Resource List.pdf 249.55KB
6. Essential Fish Habitat (Corps Requirement)
6a. Will this project occur in or near an area designated as an Essential Fish Habitat?*
r Yes r No
6b. What data sources did you use to determine whether your site would impact an Essential Fish Habitat?*
Based on field surveys and observations, the four seeps/streams do not contain fish, and the sand substrate provide very marginal macroinvertebrate
habitat.
7. Historic or Prehistoric Cultural Resources (Corps Requirement)
7a. Will this project occur in or near an area that the state, federal or tribal governments have designated as having historic or cultural preservation status?*
r Yes r No
7b. What data sources did you use to determine whether your site would impact historic or archeological resources?*
A qualitative site field survey was completed by Susan Bupp (MA, RPA) in February2019, and the SHPO records were reviewed February 21, 2019.
The draft SHPO package and cover letter is attached.
7c. Historic or Prehistoric Information Upload
Chemours Stream Flow -through Cell Project NC SHPO Cover Letter 06-02-2020 draft.pdf 336.78KB
Chemours Stream Flow -through Cell Project NC SHPO Packet 6 2 20.pdf 9.62MB

8. Flood Zone Designation (Corps Requirement)
8a. Will this project occur in a FEMA-designated 100-year flood plain?*
G Yes r No
8b. If yes, explain how project meets FEMA requirements:
Very minor impact.
8c. What source(s) did you use to make the floodplain determination?*
FEMA website
Miscellaneous
Comments
Under Section 5 above, the WOTUS Report and supporting appendices have been uploaded.
Miscellaneous attachments not previously requested.
2019-02-25 Consent Order - file -stamped and fully executed (b & w).pdf
2.82MB
Chemours Deed.pdf
355.95KB
Chemours IPaC Official Resource List.pdf
249.55KB
Chemours Property Information.pdf
258.73KB
FEMA Flood Map.pdf
227.38KB
Legal Description - Fayetteville Works As Surveyed Descriptions. pdf
68.53KB
Chemours permit flow -through cell QUANTITIES FOR PERMfT.pdf
58.14KB
U
Signature U
*
W By checking the box and signing below, I certify that:
• I have given true, accurate, and complete information on this form;
. I agree that submission of this PCN form is a "transaction" subject to Chapter 66, Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act");
• I agree to conduct this transaction by electronic means pursuant to Chapter 66, Article 40 of the NC General Statutes (the "Uniform Electronic Transactions Act");
I understand that an electronic signature has the same legal effect and can be enforced in the same way as a written signature; AND
• I intend to electronically sign and submit the PCN form.
Full Name:
Luke F. Eggering, SPWS
Signature
Date
6/3/2020