NC0082970_Instream Monitoring for Turbidity_20170222

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E NVIRONMEN1 AL. OUAL.ITY
February 16, 2017
Mr. T. Pratt Summers, Vice President, Operations
CTI of North Carolina, Inc.
P.O. Box 576
Savannah, GA 31402
Dear Mr. Summers:
ROY COOPER
Governor
MICHAEL S. REGAN
Secrelaq
S. JAY ZIMMERMAN
Director
Subject: Instream Monitoring for Turbidity
NPDES Permit NCO082970
CTI of North Carolina, Inc.
Wilmington Terminal
1002 S. Front St, Wilmington, NC 28401
New Hanover County
Bulk -storage facilities have potential to discharge turbid effluents. Considering that North Carolina has
established standards for Turbidity relevant to your facilities receiving -stream classification. Monitoring
and permit limits are deemed appropriate to evaluate effluent compliance for saltwater [NCAC 02B.
0211(19)]. For the latest permit renewal, Footnote 4 was added to the effluent pages [Part I, A. (1.) & A
(2.)] for Outfalls 001 & 003 at follows:
Turbidity — Effluent turbidity shall not cause receiving -stream turbidity to exceed 25 NTU. If
background turbidity naturally exceeds 25 NTU, the effluent shall not cause background turbidity to
increase. Any discharge exceeding this permit limit will require sufficient instream sampling
(upstream and/or downstream) to verify compliance (effluent vs. background). [NCAC 02B.
0220(19)]
For January monitoring, the Wilmington Regional Office was contacted regarding Turbidity results for
Outfalls 001 & 003 that were greater than 25 NTU. Pursuant to Footnote 4, instream sampling will be
required to verify compliance. Please note that Instream monitoring should be conducted at the same
frequency as the effluent monitoring. The Division will update our database to add instream monitoring
with the following locations designated as Outfalls for the purpose of reporting in eDMR:
Outfall 004 — a location no less than 50 -ft upstream of Outfall 003
Outfall 005 — a midpoint between Outfalls 001 & 003 located no less than 50 -ft downstream of
Outfall 003 and no less than 50 -ft upstream of Outfall 001
Outfall 006 — a location no less than 50 -ft downstream of Outfall 001.
.'-'N otYlinel l'::omlaares -. .
State of North Carolina I Environmental Quality
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919-707-9000

Mr. Summers
February 16, 2017
Page 2 of 2
Once you and your staff have identified instream locations within these guidelines, please provide us the
coordinates for the permit file.
If you have questions, or if we can be of further service, please contact Derek Denard at
[[e-mail]] or call [phone].
Respectfully,
Derek Denard, Environmental Specialist
Compliance & Expedited Permitting Unit
Division of Water Resources, NCDEQ
Enclosure: NPDES Permit NCO082970
he: Central Files
NPDES Program Files
WiRO Files/ Attn: Jim Gregson
ec: Tom Dolan, CTI of North Carolina, Inc. [[e-mail]]
Jim Gregson [e-mail]]
Dean Hunkele [[e-mail]]
Anndell Ottaway [[e-mail]]