NCG030433_2022 DMR_20220621

Wolfspeed.
Wolfspeed Inc.
4600 Silicon Drive
Durham, North Carolina, 27703
June 20, 2022
NC DEQ/ Division of Water Resources
1628 Mail Service Center
Raleigh, NC 27699-1628
To Whom It May Concern:
Please find enclosed the monthly stormwater Discharge Monitoring Report for the three stormwater outfalls
in Tier II Response located at Wolfspeed, Inc., 4600 Silicon Drive, Durham, Durham County, North Carolina.
Discharge samples were not collected for the sampling month of May due to unsafe sampling events.
Wolfspeed will continue the Tier II response for Outfall #2, 5, 6 until three consecutive samples are out of
benchmark range.
Please contact Robin Housh at 919-407-6103 or [e-mail] if you need additional
information.
Sincerely,
Robin Housh
Environmental Manager
4600 Silicon Drive
Durham, NC 27703 USA
Main: [phone]

NCDEQ Division of Energy, Mineral and Land Resources
Stormwater Discharge Monitoring Report (DMR) Form for NCG030000
Metal Fabrication
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. NCG030433
Person Collecting Samples: Andy Rodak
Facility Name: Wolfspeed Inc. —4600 Silicon Dr
Laboratory Name: Pace Analytical
Facility County: Durham
Laboratory Cert. No.: Env375
Discharge during this period-0 Yes X7No (if no, skip to signature and date)
Has your facility im lemented mandatory Tier response actions this sample period for any benchmark exceedances? Yes No
If so, which Tier (I II, or III)?
A copy of this DMR has been uploaded electronically via https://edocs.deg.nc.gov/Forms/SW-DMR Yes No
Date Uploaded: 6/20/2022
Analytical Monitoring Requirements for Outfalls with Industrial Activities — Benchmarks in (Red)
Parameter
Code
Parameter
Outfall SDO-02
Outfall SDO-05
Outfall SDO-06
N/A
Receiving Stream Class
C; NSW
C; NSW
C; NSW
N/A
Date Sample Collected MM/DD/YYYY
46529
24-Hour Rainfall in inches
C0530
TSS in mg/L (100 or 50*)
00400
pH in standard units (6.0 — 9.0 FW,
6.8-8.5 SW)
01119
Copper, total recoverable in mg/L
(0.010 FW, 0.0058 SW)
01051
Lead, total recoverable in mg/ L
(0.075 FW, 0.22 SW)
01094
Zinc, total recoverable in mg/ L (0.126
FW, 0.095 SW)
00340
Chemical Oxygen Demand (COD) in
mg/L (120)
00552
Non -Polar Oil & Grease in mg/L (15)
* 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
FW (Freshwater) SW (Saltwater) J -The reported value is an estimate
Notes (optional):
"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
falsAinformation, including the possibility of fines and imprisonment for knowing violations."
ature of Permittee or Delegated Authorized Individual
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Email Address
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Phone Number