NC0085839_Permit Correction_20130311

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...417AA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Pat McCrory Charles Wakild, P. E. John E. Skvarla, Ill
Governor Director Secretary
March 11,2013
Mr.Jeffrey S. Ferguson,P.E.
Unimin Corporation
P.O.Box 588
Spruce Pine, NC 28777
Subject: NPDES Permit Correction
Permit No. NC0085839
Unimin Corporation-Red Hill Facility
Facility Class II
Mitchell County
Dear Mr.Ferguson:
Division personnel have determined that the expiration date of the subject permit is
incorrect. Accordingly,we are forwarding the attached NPDES discharge permit. This permit
is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency dated October 15,2007(or as subsequently amended).
Please replace the current permit cover page with the attached page. Note that the
correct permit expiration date is February 29, 2016.
If any parts,measurement frequencies or sampling requirements contained in this
permit are unacceptable to you,you have the right to an adjudicatory hearing upon written
request within thirty(30) days following receipt of this letter. This request must be in the form
of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and
filed with the Office of Administrative Hearings,6714 Mail Service Center,Raleigh,North
Carolina 27699-6714. Unless such a demand is made,this permit shall be final and binding.
Please take notice that this permit is not transferable. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the legal
1617 Mail Service Center,Raleigh,North Carolina 27699-1617
Location:512 N.Salisbury St.Raleigh,North Carolina 27604
Phone:[phone] FAX:[phone]
Internet:www.ncwaterquality.orq One
An Equal Opportunity 1 Affirmative Acton Employer North C arolina
Naturally

Mr.Jeffrey Ferguson ,
March 11,2013
Page 2 of 2
requirements to obtain other permits,which may be required by the Division of Water Quality,
or permits required by the Division of Land Resources, Coastal Area Management Act,or any
other Federal or Local governmental permits may be required.
If you have any questions or need additional information,please contact Ms.Jacquelyn
Nowell at telephone number(919)807-6386.
Sincerely,
S
ft."--
OCharles Wakild,P.E.
Attachments
cc: Asheville Regional Office/Surface Water Protection Section(ecopy)
Aquatic Toxicology(ecopy)
NPDES File
Central Files

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Permit Number: NC0085839
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
Unimin Corporation
is hereby authorized to discharge wastewater from a facility located at
Red Hill Facility
2241 N.C. Highway 197
Bakersville
Mitchell County
to receiving waters designated as the North Toe River in the French Broad River Basin in
accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, II, III and IV hereof.
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This permit shall become effective June 1, 2012.
This permit and authorization to discharge shall expire at midnight on February 29, 2016.
Signed this day April 30, 2012.
f harles Waldld, P.E., Director
Division of Water Quality
By Authority of the
Environmental Management Commission
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Permit Number: NC0085839
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are
hereby revoked, and as of this issuance, any previously issued permit bearing this number is
no longer effective. Therefore, the exclusive authority to operate and discharge from this facility
arises under the permit conditions, requirements, terms, and provisions included herein.
Unimin Corporation
Red Hill Facility
is hereby authorized to:
1. Continue to operate a wastewater treatment plant for process wastewater from mineral
extraction, located at Red Hill Facility, consisting of:
• Mix-reactor tanks;
• Lime silo;
• Flocculant feed system;
• 6000 gallon steady state collection tank
• Dual steady state collection tank pumps;
• 23,000 gallon intermediate agitation tank;
• Agitation tank return pump;
• 23,000 gallon low shear agitation tank;
• 23,000 gallon last chance agitation tank;
• 70 foot diameter solids thickener;
• Dual solids thickener pumps;
• 150 square foot cloth drum filter;
• 333,1000 gallon effluent solids settling pond;
• Settling pond effluent pump;
• Lime and polymer feed systems;
• Two thickeners;
• Two drum filters;
• pH adjustment;
• Two emergency ponds, and
• flow measurement.
The facility is located at the Red Hill Quartz Facility, 2241 N.C. Highway 197,
Bakersville, in Mitchell County, and;
2. Discharge wastewater through Outfall 001 from said treatment works at the location
specified on the attached map into the North Toe River, which is classified C Trout
waters in the French Broad River Basin.
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