NC0055786_EC_Screening_Evaluation_20230515

DocuSign Envelope ID: 4CD03EC2-D4E4-47ED-B80E-2896B7068D30
ROY COOPER
Governor
ELIZABETH S. BISER
Secretary
RICHARD E. ROGERS, JR.
Director
NORTH CAROLINA
Environmental Quality
5/15/2023
Via Electronic Mail ([e-mail])
Ms. Eglantina Minerali
Pretreatment Coordinator
City of Lexington, Wastewater Treatment Plant
28 W. Center Street
Lexington, NC 27292
Subject: New Significant Industrial User (Pretreatment) Permit Applications
City of Lexington's Pretreatment Program
City of Lexington WWTP, NPDES # NC0055786, Davidson County
Dear Ms. Minerali:
The Division of Water Resources (DWR) is working to identify sources of PFAS to protect water
quality and drinking water supplies. Referring to both the EPA's Drinking Water Health Advisory
on PFAS and the 12/5/2022 EPA Memo titled Addressing PFAS Discharges in NPDES Permits
and Through the Pretreatment Program and Monitoring Programs, DWR expects that all local
pretreatment programs will conduct an emerging contaminant (EC) screening for new Significant
Industrial Users (SIU) permits, including for Siemens Mobility's pending application. DWR
expects clear information regarding the presence of EC in new SIUs' wastewater, sludge, and
solids. An approved local pretreatment program (Control Authority) has the primary responsibility
for reviewing SIU applications and issuing SIU permits. In DWR's oversight role of local
pretreatment programs, DWR expects Control Authorities to conduct the following EC screening
process for new SIU permits:
• Provide the attached "New SIU Permit Application PFAS Screening Questionnaire" in
SIU permit application materials to applicants;
• As required by 15A NCAC 02H .0917(a), continue to submit new SIU draft permits to
DWR thirty (30) days prior to the permit's effective date;
• When the Control Authority submits a draft SIU permit for a new industry to DWR for
review, include:
1. the completed "New SIU Permit Application PFAS Screening Questionnaire",
2. an EC Baseline Monitoring Plan prepared by the POTW based on the response
above,
3. a draft SIU permit that includes a requirement that the SILT implement the EC
Baseline Monitoring Plan.
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CARCLINA
919.707.9000

DocuSign Envelope ID: 4CD03EC2-D4E4-47ED-B80E-2896B7068D30
Federal and State pretreatment regulations require the Control Authority to effectively control and
document the discharge of wastewater from Significant/Categorical Industrial Users. It is the
Control Authority's responsibility to ensure that these objectives are consistently met.
If you have any questions or comments, please contact Keyes McGee at [phone] [email:
[e-mail]]. Thank you for your continued support of the Pretreatment Program.
Sincerely,
�^D,o'c'u,Siwgne'd byy:p w', In.'' A
YVUl (�t� l�V 6V�µC. h
C464531431644FE...
Michael J. Montebello
NPDES Branch Chief
Division of Water Resources
tkm\EC Screening Evaluation _5_15_23_Lexington
Ec: Tricia Lowery, WSRO
Jenny Graznak, WSRO
Stephanie Bolyard, PhD., CO
David Lambert, CO
Municipal Unit File
Central Files (Laserfische)
REQ5 North Carolina Department ofEnvironmental Quality I Division ofWater Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CAROLINA 919.707.9000
naparMeM of EmironmanW 9uallly

DocuSign Envelope ID: 4CD03EC2-D4E4-47ED-B80E-2896B7068D30
NEW SIU PERMIT APPLICATION PFAS SCREENING QUESTIONNAIRE:
Do you use any material or products (directly or indirectly) in your operations that
contain fluorinated chemicals? If so, please identify what materials or products contain
fluorinated chemicals.
2. Will your facility formulate or create products (directly or indirectly) which contain
fluorinated chemicals? If so, please identify the specific fluorinated chemicals that may
be formulated or created.
3. Will your facility produce solid waste, liquid waste, wastewater effluent, or other waste
containing fluorinated chemicals? Please be as specific as possible to describe what
fluorinated chemicals may result in the facility's wastewater, solid waste, or sludge.
4. Are there processes or operations that use equipment, material, or components that
contain HAS chemicals (e.g., surface coating, clean room applications, solvents,
lubricants, fittings, tubing, processing tools, packaging, facility infrastructure)? Could
these activities result in fluorinated chemicals being discharged as products, or by-
products (i.e., through leaching, chemical process, heat treatment, pressurization, etc.)?
5. List CAS numbers of all known or believed present fluorinated compounds from the
questions above. Please provide descriptions, quantities, and whether there are any
unknowns related to the above questions.
6. Are there other facilities or operations in the U.S. or internationally that are identical to or
may use processes similar to the project in North Carolina? If so, please provide facility
identification information and wastewater characterization including all PFAS
compounds?
7. Additionally, have any PFAS analytical results been collected with any analytical test
method similar to the following EPA Test Methods. Are any of the fluorinated
compounds listed in one of the following methods and can you provide us with data
resulting from these test methods?
• Methods 533 & 537.1 (drinking water)
• SW-846: Method 8327 (water)
• Draft Method 1633 (water, solids, tissue)
• "Total PFAS" Draft Method 1621 (wastewater)
REQ5 North Carolina Department ofEnvironmental Quality I Division ofWater Resources
512 North Salisbury Street 1 1611 Mail Service Center I Raleigh, North Carolina 27699-1611
NORTH CAROLINA 919.707.9000
onparhnem of EmironmanW 9uallly