NC0003875_Correspondence_20110526

NPDES DOCUMENT !;CANNINL COVER !MEET
NC0003875
Elementis Chromium WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Staff Comments
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
May 26, 2011
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A7A
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
May 26, 2011
Mr. Calvin Overcash
Elementis Chromium, Inc.
5408 Holly Shelter Rd
Castle Hayne, N. C. 28429
Subject: NPDES Permit NC0003875
Change in Reducing Agents
New Hanover County
Dear Mr. Overcash:
The Division has reviewed your modification request for the subject facility. The
Division has no current objection to your proposed change in reducing agents. However,
please note that instream dissolved oxygen (D.O.) levels are of great concern to the
Division. If instream D.O. data show a negative impact from the change in reducing
agents, your permit may be reopened to require more frequent D.O. monitoring or other
measures as necessary to preserve instream water quality.
Your request requires no changes to the limits or monitoring frequencies
in your current permit.
If you have any questions concerning this matter, please contact Charles H. Weaver
at [phone] or via e-mail [[e-mail]].
cc: Central Files
Wilmington Regional Office / Surface Water Protection
NPDES Unit
- Sincerely,rely,
Coleen H. Sullins
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
512 North Salisbury Street, Raleigh, North Carolina 27604
Phone: [phone] / FAX [phone] / Internet: www.ncwaterquality.org
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Weaver, Charles
From: Meadows, Susan
Sent: Monday, May 16, 2011 10:43 AM
To: Weaver, Charles
Subject: RE: please comment on mod request for Elementis Chromium (NC0003875)
Hi Charles,
I don't actually deal with dissolved oxygen issues. We look at modifications to WET Testing and most other changes,
such as this, would be beyond our technical expertise.
Is there a particular reason you wanted us to look at this?
If the chemical change were to effect WET then that would show in their first test.
Thanks.
Susan
Susan Meadows, Environmental Biologist
Aquatic Toxicology Unit
DWCt/Environmental Sciences Section
4401 Reedy Creek Road Raleigh, NC 27607
[e-mail]
t: [phone]
f: [phone]
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Weaver, Charles
Sent: Monday, May 16, 2011 10:20 AM
To: Meadows, Susan
Subject: please comment on mod request for Elementis Chromium (NC0003875)
Susan — please review the attached modification request, from the subject permittee.
The proposed modification would not require any changes to permit limits and/or monitoring frequencies.
However, we need your input to determine if the proposed changes might unacceptably affect; instream
dissolved oxygen levels.
If you want more info from the permittee directly, contact Calvin Overcash at 910 675-7229.
Send me your comments on this one and I'll send them an official response. Thanks, as always, for your
help.
CHW
Messages to and from this address are subject to the NC Public Records Law.
1

Catawba County Schools
Blackburn Elementary School
A to C No. 074233A01
Issued August 16, 2006
Engineer's Certification
I, , as a duly registered Professional Engineer in
the State of North Carolina, having been authorized to observe (periodically/weekly/full time)
the construction of the modifications and improvements to Blackburn Elementary School located
on Lohr Lane in Catawba County for Catawba County Schools, hereby state that, to the best of
my abilities, due care and diligence was used in the observation of the following construction:
Installation of a tablet dechlorination system pursuant to the fast track application
received on August 15, 2006, and in conformity with the Minimum Design
Criteria for Dechlorination Facilities.
I certify that the construction of the above referenced project was observed to be built
within substantial compliance and intent of the approved plans and specifications.
Signature Registration No.
Date
Send to: Construction Grants & Loans
DENR/DWQ
1633 Mail Service Center
Raleigh, NC 27699-1633

ELEMENT'S
CHROMIUM
CERTIFIED MAIL 91 7108 2133 3936 2543 7553
RETURN RECEIPT REQUESTED
March 31, 2011
NC DENR-Division of Water Quality
Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
ATTENTION: Mr. Tom Belnick
RE: Industrial Waste Treatment Reducing Reagents
NPDES Permit No. NC0003875
Elementis Chromium, L.P., Castle Hayne Plant
Castle Hayne, NC, New Hanover County
Dear Mr. Belnick:
t
APR 0 1 2011
DENR-WA; cF. QUALITY
POINT SOURCE BRANCH
The Elementis Chromium Castle Hayne Facility operates an industrial waste treatment facility and
discharges effluent to the Cape Fear River under NPDES Permit No. NC0003875. Currently,
Elementis utilizes sulfur dioxide and ferrous chloride (pickle liquor) to reduce hexavalent chromium
to trivalent chromium. Elementis would like to have the option of using various different reducing
agents in the waste treatment process. Specifically, Elementis requests the use of sulfur based
reducing agents and iron based reducing agents. Some examples of sulfur based and iron based
reducing agents are as follows:
Ferrous Sulfate (dry or aqueous)
Sodium Bisulfate Solution (Aqueous)
Sodium Hydrogen Sulfide
The use of alternative treatment chemicals will not adversely affect the quality of the discharge from
waste treatment. Additionally, Elementis will continue to follow rigorous intemal quality
procedures for qualifying new chemicals to prevent high levels of impurities from being introduced
to the waste water treatment process.
ELEMENTIS CHROMIUM INC
5408 Holly Shelter Road
Castle Hayne, NC 28429
Telephone: [phone]
Facsimile: 910/675-7201

• t
ELEMENTIS
CHROMIUM
If you have any questions, please do not hesitate to call me at [phone].
Calvin Overcash
Regulatory Manager
CC: Kip Glazier
NCDENR — Wilmington Regional Office
ELEMENTIS CHROMIUM INC
5408 Holly Shelter Road
Castle Hayne, NC 28429
Telephone: [phone]
Facsimile: 910/675-7201