NCG020330_2024 DMR_20240325

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;Jennifer Cassada,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:0 Yes No (if no,skip to signature and date)
Has your facility implemented mandatory Tier response actions this sample period for any benchmark exceedances?EYes Q 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 E Yes No
Date Uploaded: 03/25/2024
Analytical Monitoring Requirements for Outfalls with Industrial Activities—Benchmarks in(Red)
Parameter Parameter Outfall 001 Outfall004 Outfa11005 Outfa11008 Outfall009
Code
N/A Receiving Stream Class Class C Class C Class C Class C Class C
N/A Date Sample Collected MM/DD/YYYY 02/23/2024 02/23/2024 02/23/2024 02/23/2024 02/23/2024
46529 24-Hour Rainfall in inches 0.26 0.26 0.26 0.26 0.26
C0530 TSS in mg/L(100 or 50*) 4.2 8.8 5.5 32 8.4
00070 Turbidity of discharge** 9.6 34 9.9 45 45
Turbidity downstream of discharge** 5.0 N/A N/A N/A N/A
Turbidity upstream of discharge** 8.5 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 N/A N/A
Usage in gal/month
00552 Non-Polar Oil&Grease in mg/L(15) N/A N/A N/A N/A N/A
Additional parameters for Clay Mines
01105 Aluminum,total in mg/L(0.75 FW,
0.24 SW)
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,
6.8-8.5 SW)
01097 Antimony,total in mg/L(0.34 FW,
N/A SW)
01002 Arsenic,total in mg/L(0.15 FW,0.069
SW)
C0034 Chromium III in mg/L(0.905 FW,N/A
SW)
Additional parameters for Feldspar Ore Mines
01105 Aluminum,total in mg/L(0.75 FW,
0.24 SW)
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(0.75 FW,
0.24 SW)
00951 Fluoride,total in mg/L(6.0)
Additional parameters for Phosphate Mines
00951 Fluoride,total in mg/L(6.0)
39344 Alpha,Gross Particle Activity
Additional parameters for Industrial Sand Mines
00951 Fluoride,total in mg/L(6.0)
C00334 Chromium III in mg/L(0.905 FW,N/A
SW)
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 50 mg/L.All other water classifications have a benchmark of 100 mg/L
**See F-S of the NCG020000 General Permit for turbidity requirements.
FW(Freshwater)SW(Saltwater)
Notes(optional):See 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,including the possibility of fines and imprisonment for knowing violations."
Signature of Permittee or Delegated Authorized Individual Date
[e-mail] 919-642-4010
Email Address Phone Number
Note:
Three consecutive sampling events (including in-stream samples) have shown turbidity and all other parameters within
range. Therefore OF-001 is no longer in Tier II status.