NCG020330_Letter RE SW Charactization Data_20240626

3M Pittsboro 4191 NC-87
Moncure, NC 27559
June 20, 2024
Sent via email:[e-mail]
Mr. Scott Vinson
North Carolina Department of Environmental Quality
Division of Energy, Mineral and Land Resources
1612 Mail Service Center
Raleigh, NC 27699-1612
Subject: 3M Pittsboro General Permit No. NCG020000 2021 Renewal Certificate of
Coverage(NCG020330) Request—Data Addendum
Mr. Scott Vinson:
Enclosed with this letter, is an addendum to the 3M Pittsboro General Permit No. NCG020000 2021
Renewal Certificate of Coverage (COC) Request(NCG020330).The addendum includes data tables
showing concentrations of constituents sampled under the 3M Water Management Standard (WMS)
Program. 3M previously submitted the data reports for these constituents to the Division of Energy,
Mineral and Land Resources. Copies of the data reports are available upon request.
3M is providing these data to fully disclose characteristics of stormwater discharges. Included in the data
tables, are concentrations for Per-and polyfluoroalkyl (PFAS) substances.The data tables for Q4 2023
and Q1 2024 are being submitted as a voluntary characterization to supplement the application 3M
previously submitted in 2021. Please note that we plan to continue submitting lab reports as voluntary
supplemental information.
31VI is requesting written confirmation that the ongoing discharge of the PFAS constituents along with all
the USEPA Method 537.1 constituents continue to be authorized under the General Permit.This is
consistent with the Clean Water Act (40 CFR§ 122.28) requirement to submit complete permit
applications for stormwater discharges and a 1994 USEPA Memorandum regarding Scope of Discharge
Authorizations.
We are requesting written confirmation of data addendum receipt by email or mail. If you have any
questions or comments, we are willing to meet and discuss them. In the meantime, if you have any
questions or comments, please contact me at(765) 228-9619 or by email at [e-mail].
Sincerely,
Blake Arnett
Plant Director
Cc: Daniel Christman, 3M Pittsboro EHS Engineer
Gina Cyprych, 3M Global EHS Water Quality Environmental Specialist
Peter Koranchie-Boah, 3M Global EHS Water Quality Environmental Specialist
Enclosure
Page 1 of 2

3M Pittsboro
General Permit No.NCG020000 2021 Renewal COC Request-Data Addendum 2024
Data Addendum Tables
Table 1.3M Pittsboro Stormwater Conventional Constituents Data:
Outfall 001 Outfall 004 Outfall 005
Analyte Q4 2023 Q12024 Q4 2023 Q12024 Q4 2023 Q12024
Oil&Grease(HEM) ND NS NS NS ND NS
Total organic carbon 6.0 NS NS 1.8 6.3 4.5
Outfall 008 Outfall 009
Analyte Q4 2023 Q12024 Q4 2023 Q12024
Oil&Grease(HEM) ND NS NS NS
Total organic carbon 7.1 5.5 NS 12
NS=No sample collected.
"<"=Constituent not detected at the method detection limit.
Table 2.3M Pittsboro Stormwater PFAS Data:
Outfall 001 Outfall 004 Outfall 005
Analyte Q4 2023 Q12024 Q4 2023 Q12024 Q4 2023 Q12024
(ng/L) (ng/L) (ng/L) (ng/L) (ng/L) (ng/L)
4:2 FTS <0.43 <0.43 NS <0.43 <0.43 <0.43
6:2 FTS <0.43 <0.43 NS <0.43 <0.43 <0.43
8:2 FTS <0.51 <0.51 NS <0.51 <0.51 <0.51
Perfluorobutanesulfonic acid(PFBS) 0.92 0.89 NS 0.36 1.7 1.4
Perfluorobutanoic acid(PFBA) 3.4 NS 5.1 7.3 5.8
Perfluorohexanesu►fonic acid(PFHxS) 0.55 0.39 NS <0.17 1.3 0.83
Perfluorohexanoic acid(PFHxA) 1.1 <0.86 NS <0.86 4 2.9
Perfluorooctanesulfonic acid(PFOS) 1.3 1.1 NS <0.43 1.4 1.3
Perfluorooctanoic acid(PFOA) 1.7 1.2 NS 0.61 5 5.2
Outfall 008 Outfall 009
Analyte Q4 2023 Q12024 Q4 2023 Q12024
(ng/L) (ng/L) (ng/L) (ng/L)
4:2 FTS <0.43 <0.43 NS <0.43
6:2 FTS <0.43 <0.43 NS <0.43
8:2 FTS <0.51 <0.51 NS <0.51
Perfluorobutanesulfonic acid(PFBS) 3.6 2.9 NS 0.74
Perfluorobutanoic acid(PFBA) 12 11 NS 6.3
Perfluorohexanesulfonic acid(PFHxS) 2.4 1.5 NS 0.28
Perfluorohexanoic acid(PFHxA) 13 8.8 NS 1.5
Perfluorooutanesulfonic acid(PFOS) 2.5 1 NS 1.3
Perfluorooctanoic acid(PFOA) 11 7.7 NS 2.3
NS=No sample collected.
"<"=Constituent not detected at the method detection limit.
Page 2 of 2