NCG020330_2023 DMR_20240119

NCDEQ Division of Energy,Mineral and Land Resources
Stormwater Discharge Monitoring Report(DMR) Form for NCG020000
Active and Inactive Mining Sites
Click here for instructions
Complete,sign,scan and submit the DMR via the Stormwater NPDES Permit Data Monitoring Report(DMR) Upload form within
30 days of receiving sampling results. Mail the original,signed hard copy of the DMR to the appropriate DEMLR Regional Office.
Certificate of Coverage No. NCGO2 0330 Person Collecting Samples:Faelan Hoese, ECT, Inc.
Facility Name: 3M Pittsboro Laboratory Name: Eurofins Lancaster Laboratories Environment Testing,LLC
Facility County:Chatham Laboratory Cert. No.:521
Discharge during this period:El Yes El No (if no,skip to signature and date)
Has your facility implemented mandatory Tier response actions this sample period for any benchmark exceedances?E Yes ❑No
If so,which Tier(I,II,or III)? Tier II(stormwater benchmarkexceedance)
A copy of this DMR has been uploaded electronically via https://edocs.deq.nc.gov/Forms/SW-DMR 0 Yes El No
Date Uploaded:01/19/2024
Analytical Monitoring Requirements for Outfalls with Industrial Activities—Benchmarks in(Red)
Parameter Parameter Outfall 001 Outfa11004 Outfall005 outfa11006 outfa11008
Code
N/A Receiving Stream Class Class C Class C Class C 'Class C Class C
N/A Date Sample Collected MM/DD/YYYY 11/21/2023 No Discharge 11/21/2023 11/21/2023 11/21/2023
46529 24-Hour Rainfall in inches 0.72 0.72 0.72 0.72 0.72
C0530 TSS in mg/L(100 or 50*) 2.9 No Discharge 37 19 3.1
00070 Turbidity of discharge'* Not sampled No Discharge Not sampled Not sampled Not sampled
Turbidity downstream of discharge 4.7 N/A N/A N/A N/A
Turbidity upstream of discharge 18 N/A N/A N/A N/A
Additional parameters for outfalls in drainage areas that use>55 gallons per month of new hydraulic oil on average
NCOIL Estimated New Motor/Hydraulic Oil N/A N/A N/A Not sampled N/A
Usage in gal/month
00552 Non-Polar Oil&Grease in mg/L(15) N/A N/A N/A <1.6 N/A
Additional parameters for Clay Mines
01105 Aluminum,total in mg/L(0.75 FW,
01092 Zinc,total(as Zn)in mg/L(0.126 FW,
0.095 SW)
00951 Fluoride,total in mg/L(6.0)
00900 Hardness,total
00400 pH,in standard units(6.0-9.0 FW,
01097 Antimony,total in mg/L(0.34 FW,
N/A SW)
01002 Arsenic,total in mg/L(0.15 FW,0.069
C0034 Chromium III in mg/L(0.905 FW,N/A
Additional parameters for Feldspar Ore Mines
01105 Aluminum,total in mg/L(0.75 FW,
01092 Zinc,total(as Zn)in mg/L(0.126 FW.
0.095 SW)
00951 Fluoride,total in mg/L(6.0)

Additional parameters for Lithium Ore Mines
01105 Aluminum,total in mg/L
00951 Fluoride,total in mg/L
Additional parameters for Phosphate Mines
00951 Fluoride,total in mg/L •
39344 Alpha,Gross Particle Activity
Additional parameters for Industrial Sand Mines
00951 Fluoride,total in mg/L 0;
C00334 Chromium Ill in mg/L D.905 FW,N/ -
39344 Alpha,Gross Particle Activity
Outfalls to Outstanding Resource Waters(ORW),High Quality Waters(HQW),Trout Waters(Tr)and Primary Nursery Areas(PNA)
have a benchmark TSS limit of .All other water classifications have a benchmark of
See F-5 of the NCG020000 General Permit for turbidity requirements.
(Freshwater) (Saltwater)
Notes(optional):See note below.
"I certify by my signature below,under penalty of law,that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.Based on my
inquiry of the person or persons who manage the system,or those persons directly responsible for gathering the information,the information
submitted is,to the best of my knowledge and belief,true,accurate,and complete.I am aware that there are significant penalties for submitting
false information,includi the possibility of fines and imprisonment for knowing violations."
/ /1/2/74
Signature of Permittee r Del ated Authorized Individual Date
[e-mail] 919-642-4010
Email Address Phone Number
Note:
3M did not sample for Turbidity and Settleable Solids from Outfalls 001, 005, 006 and 007 for the period of October
1 —December 31 (Q4) 2023 in accordance with section F-1. Required Baseline Sampling under general permit
NCG02. 3M conducted sampling at these outfalls on Tuesday 11/21/2023. 3M recently implemented a voluntary
sampling program called the Water Management Standard (WMS) of its stormwater outfalls for certain parameters in
addition to the parameters required under the stormwater permit. In adding new sampling parameters, 3M's
consultant missed grabbing samples for turbidity and settleable solids at 4 outfalls: 001, 005, 006, and 008. 3M did
obtain upstream and downstream Turbidity samples for Outfall 001, which are required by F-1. (e) and the outfall's
Tier Two status.
Upon learning that the parameters were not analyzed, 3M immediately contacted the lab to request additional
sample volume be substituted from WMS parameters for the permit required parameters; however, the lab was
unable to make the needed substitutions.
3M has since implemented a new quality control procedure to ensure all permit required parameters are collected for
each outfall during future sampling events.
Lab results for WMS parameters from the Q4 2023 event are included with this submission, and 3M will continue to
share the results from WMS sampling with NCDEQ for all future sampling events for the duration of WMS
implementation.

NCDEQ Division of Energy,Mineral and Land Resources
Stormwater Discharge Monitoring Report(DMR) Form for NCG020000
Active and Inactive Mining Sites
Click here for instructions
Complete,sign,scan and submit the DMR via the Stormwater NPDES Permit Data Monitoring Report(DMR)Upload form within
30 days of receiving sampling results. Mail the original,signed hard copy of the DMR to the appropriate DEMLR Regional Office.
Certificate of Coverage No. NCGO2 0330 Person Collecting Samples:Faelan Hoese, ECT, Inc.
Facility Name: 3M Pittsboro Laboratory Name: Eurofins Lancaster Laboratories Environment Testing,LLC
Facility County: Chatham Laboratory Cert. No.:521
Discharge during this period:El Yes 0 No (if no,skip to signature and date)
Has your facility implemented mandatory Tier response actions this sample period for any benchmark exceedances?QYes ❑No
If so,which Tier(I, II,or III)? Tier II(stormwater benchmarkexceedance)
A copy of this DMR has been uploaded electronically via https://edocs.deq.nc.gov/Forms/SW-DMR El Yes ❑No
Date Uploaded:01/19/2024
Analytical Monitoring Requirements for Outfalls with Industrial Activities—Benchmarks in
Parameter Parameter Outfall 009 Outfall Outfall Outfall Outfall
Code
N/A Receiving Stream Class Class C
N/A Date Sample Collected MM/DD/YYYY No Discharge
46529 24-Hour Rainfall in inches No Discharge
C0530 TSS in mg/L(100 or 50*) No Discharge
00070 Turbidity of discharge" No Discharge
Turbidity downstream of discharge N/A
Turbidity upstream of discharge N/A
Additional parameters for outfalls in drainage areas that use>55 gallons per month of new hydraulic oil on average
NCOIL Estimated New Motor/Hydraulic Oil N/A
Usage in gal/month
00552 Non-Polar Oil&Grease in mg/L N/A
Additional parameters for Clay Mines
01105 Aluminum,total in mg/L(0.75 FW,
•
01092 Zinc,total(as Zn)in mg/L(0.126 FW,
0.095 SW)
00951 Fluoride,total in mg/L(6.0)
00900 Hardness,total
00400 pH,in standard units(6.0-9.0 FW,
01097 Antimony,total in mg/L(0.34 FW,
N/A SW)
01002 Arsenic,total in mg/L(0.15 FW,0.069
C0034 Chromium III in mg/L(0.905 FW,N/A
Additional parameters for Feldspar Ore Mines
01105 Aluminum,total in mg/L(0.75 FW,
01092 Zinc,total(as Zn)in mg/L(0.126 FW,
0.095 SW)
00951 Fluoride,total in mg/L

Additional parameters for Lithium Ore Mines
01105 Aluminum,total in mg/L(0.75 Fv.
24 SW)
00951 Fluoride,total in mg/L(6.0)
Additional parameters for Phosphate Mines
00951 Fluoride,total in mg/L
39344 Alpha,Gross Particle Activity
Additional parameters for Industrial Sand Mines
00951 Fluoride,total in mg/L(6.0)
C00334 Chromium Ill in mg/L 3.905 FW,N/A
39344 Alpha,Gross Particle Activity
Outfalls to Outstanding Resource Waters(ORW),High Quality Waters(HQW),Trout Waters(Tr)and Primary Nursery Areas(PNA)
have a benchmark TSS limit of .All other water classifications have a benchmark of
See F-5 of the NCG020000 General Permit for turbidity requirements.
(Freshwater) (Saltwater)
Notes(optional):No discharge at OF-009.
"I certify by my signature below,under penalty of law,that this document and all attachments were prepared under my direction or supervision in
accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.Based on my
inquiry of the person or persons who manage the system,or those persons directly responsible for gathering the information,the information
submitted is,to the best of my knowledge and belief,true,accurate,and complete.I am aware that there are significant penalties for submitting
false information,including the possibility of fines and imprisonment for knowing violations."
li/ 7,
6 —
Signature of ermittee or D legated Authorized Individual Date
[e-mail] 919-642-4010
Email Address Phone Number