NC0000361_Draft Permit_20181017

ROY COOPER -jy,r `4i
Governor
MICHAEL S.REGAN � � '
Secretary ^ 1"11""°""
LINDA CULPEPPER
Interim Director NORTH CAROLINA
Environmental Quality
October 17, 2018
Douglas Myers,Regional General Manager
Sibelco North America
P.O. Box 588
Spruce Pine,NC 28777
Subject: Draft NPDES Permit Renewals
Permits:NC0000175,NC0000361,
NC0084620,NC0085839
Quartz, Schoolhouse, Crystal, and Red Hill
Facilities
•
Mitchell&Avery Counties
Grade PC2 Facilities
SIC code 1459
Dear Mr.Myers:
Enclosed with this letter are copies of the draft NPDES permit renewals for your facilities. Please review
the drafts carefully to ensure thorough understanding of the requirements and conditions they contain.
There are several changes from existing permits, including the following:
• The NC 2007-2014 Water Quality Standards (WQS)Triennial Review was approved by the NC
Environmental Management Committee(EMC) on November 13, 2014. The US EPA
subsequently approved the WQS revisions on April 6,2016 with some exceptions. The NC
Division of Water Resources NPDES Permitting Unit is required to implement the new dissolved
metal standards in all permits public noticed after April 6, 2016. The new standards for most
metals include acute standards. Further,the freshwater standards for several metals are expressed
as the dissolved form of the metals, and seven metals have hardness-dependent equations.As a
result,the NPDES Permitting Unit will need site-specific effluent hardness data and instream
hardness data,upstream of the discharge, for each facility monitoring these metals in order to
calculate permit limitations. Effluent hardness and instream hardness sampling,upstream of the
discharge,has been added to each permit at a monitoring frequency of quarterly. See Special
Condition A. (1.)Effluent Limitations and Monitoring Requirements for effluent and instream
sampling requirements.
• Sampling by the EPA in 2015 and stormwater monitoring data from several quartz/feldspar mines
in the region, in conjunction with the new dissolved metals standards noted above, indicates
aluminum, copper, lead, nickel, and zinc are pollutants of concern and quarterly monitoring has
been added to the permits.
• The NPDES Standard Conditions (Parts II, III, and IV) are not included with this draft. They can
be found at the following link if you would like to review them in conjunction with this draft permit.
https://bit.ly/2BZ4xxx
£DEQ
Department o1 Environmental Uuai t
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street 1 1611 Mad Service Center I Raleigh,North Carolina 27699-1611
919.707.3601

• Since your facilities are not subjct to Federal Effluent Limitation Guidlelines,pH limits have been
changed from between 6.0& 1010 standard units to between 6.0&9.0 standard units in accordance
with the pH WQS in 15A NCAC 02B. [See Special Condition A. (1.)]
• Please review the components list for each facility on page two,Supplement to Permit Cover Sheet.
• Please review instream monitoring locations in footnote 2 of Special Condition A. (1.) Effluent
Limitations and Monitoring Req ifrements.
• NC DEMLR will be evaluating stormwater data and may direct your facilities to apply for
individual NPDES wastewater coverage in lieu of stormwater general permit coverage under
NCG020000 prior to the expiration of that general permit. If that is the case, please be reminded
that DWR will require a major modification application and associated fee along with an
Engineering Alternatives Analysis for each facility at least 180 days prior to commencing discharge
of wastewater previously covered under NCG020000. Any additional discharge of fluoride must
be accounted for in a facility's fl�I oride allocation.
• Federal regulations require electronic submittal of all discharge monitoring reports(DMRs)and
program reports. The requirement to continue reporting discharge monitoring data electronically
using the NC DWR's Electronic Discharge Monitoring Report(eDMR) internet application has
been added to your NPDES permit. [See the final Special Condition in each permit]
Concurrent with this notification the Division is publishing a notice in a newspaper having circulation in
the general Mitchell and Avery County arleas, soliciting public comments on these draft permits.Please
provide any written comments you may have to the following:NCDEQ/DWR,NPDES Permitting
Branch, 1617 Mail Service Center,Raleigh,NC 27699-1617 no later than 30 days after receipt of this
draft permit.
Following the 30-day public comment perliod,the Division will review all pertinent comments and take
appropriate action prior to issuing final permits. If you have questions concerning these draft permits,
please call me at(919) 707-3612 or by email at [e-mail].
Sincerely
David Hill,Environmental Specialist II
NPDES Complex Permitting Unit
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Aquatic Toxicolo: Branch/Susan Meadows
DWR/NC Operator Certi cation Program/Maureen Kinney
DWR/Asheville Regional ffice/Water Quality Regional Operations/Landon Davidson
DEMLR/Stormwater Program/Annette Lucas
Page 2 of 2

Permit NC0000361
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions 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
Sibelco North America
is hereby authorized to discharge wastewater from a facility located at the
Schoolhouse Quartz Facility
107 Harris Mining Company Road, Highway 19E
Avery 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
This permit shall become effective Month XX, 2018.
This permit and authorization to discharge shall expire at midnight on February 28, 2022.
Signed this day Month XX, 2018.
DRAFT
Linda Culpepper
Interim Director, Division of Water Resources
By the Authority of the Environmental Management Commission

Permit NC0000361
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are
hereby revoked. As of this permit 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.
Sibelco North America Schoolhouse Quartz Facility is hereby authorized to:
3
1. Continue to operate and maintain an existing 2.16 MGD`Wa tewater treatment facility
consisting of the following components:
.,,
• Non-fluoride waste sump with influent slurrypumps '' ..\
• Two thickeners '
• Dewatering cyclones 0,•-,'''4
• Overflow tanks <z;`„,, / '
n
,
• Disk filters `` ,\
• Fluoride-bearing waste sump with,two pumps �- - ',,..)
• Pan filter �4 `
• Recycle pump ''v .; '''', �_' 11N,
• Two flash mix units `‘.\ 4 .. , • '
• Two flocculation units
• Two lamella ow plat sensors \. �' `�
-
• Lime, alum,pH adjustment and polymer feed systems.~"'
• Mixing/reactor tanks : _ `„„;)
Multimedia filters \'::-;--i';/---"'„,',1'_'`,''''',---., �y ' '
• Filter;press-, '‘, , ,� `~-tai H.K
• -.Emergency pond.,: v`,.� 'v, , ,``',,:}
• Recycle system _,
• Flowwmeasurement '�
This facility is located at The/,S�cho.lhouse Quartz Facility, 107 Harris Mining Company
Road, Spruce Pine,'Avery County, and;
2. Discharge from said treatment wor s at the location specified on the attached map via Outfall
001 into the North Toe River, class'fied C Trout water in the French Broad River Basin.
2of8

Permit NC0000361
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 15A NCACO2B .0500 et seq.][Grade II Physical/Chemical Water
Pollution Control System 15A NCAC 08G .0306]
During the period beginning on the effective date of the permit and lasting until expiration,the permittee
is authorized to discharge treated process wastewater from Outfall 001. Such discharges shall be limited
and monitored' by the permittee as specified below:
PARAMETER CHARACTERISTICS EFFLUENT LIMITS MONITORING REQUIREMENTS
PARAMETER Monthly Weekly Daily Measurement Sample Sample
CODE Average Average, Maximum Frequency , Type Location2
Flow 50050 2.16 MGD ''Continuous Recording I or E
Total Fluoride 00951 109.0 lb/day 218.0 lb/day 'Meekly Composite E
Total Fluoride 00951 Monitolf&Report(pg/L) Weekly Grab U, D
Total Suspended Solids QD530 450.0 lb/day ' �� 721.0 !Way WeA,ly Composite E
Total Suspended Solids QD530 Monitor&ReWr(nig/L) Weekln „ Grab U, D
Settleable Solids 00545 � Mnitor&Report(rpl �)� Weekly ��_
Grab E
Turbidity3 00070 v TAROT,&Report(OM, Weekly Grab E, U, D
pH 00400 Betw 1,6.0 pd}9),0 Standard U its Weekly Grab E, U, D
Chloride4 00940 M9pgor&Repoft(mg/L) ,,�. Quarterly Composite E
Chronic Toxicity5 Ataink, Ceriodaphnia dubia 1.0% ti Quarterly Composite E
Total Aluminum ZAY01105{° , Monitor&Rep i`i g105', Quarterly Composite E
Total Copper \'-'" , 01042 d Monito Rpo`rt(pg/L) ''4 _ Quarterly Composite E
Total Lead0,1051 Monitor&'Report(pg/L) Quarterly Composite E
Total Nickel '`°0, 0.67 l Monitor&R ort(pg/L) Quarterly Composite E
Total Zinc Nickel _,..,,„„,,, '`°0, 0.67r
01092 Monii"dr&Rep (pg/L) Quarterly Composite E
Hardness�.otel as -`"` 4 ,00900 Monitor&�Repoit(mg/L)
[CaCO3oa+Mg)]6 - 1 Quarterly Composite E
Hardness T galas T 900 Monitor&Report(mg/L)
CaCO3or Ca Quarterly Grab U
Footnotes: r � -
1. The permittee ball submit Dis 'arge Monitoring Reports electronically using NC DWR's eDMR
application syst e1j a SpecA4 jondition A. (9.).
2. Sample locations 7 ' ue ;-Effluent, U-Upstream = intake pumphouse, D-Downstream =
Upstream of Laurel Creeu 'ess safety concerns then Franklintown Bridge (note on DMR). Instream
samples shall be grab samples and shall be conducted weekly.
3. The discharge from this facility shall not cause turbidity in the receiving stream to exceed 10 NTU. If
the instream turbidity exceeds 10 NTU due to natural background conditions,the discharge cannot
cause turbidity to increase in the receiving stream. Therefore, if the effluent measurement exceeds 10
NTU,the Permittee shall sample upstream and downstream turbidity in the receiving waterbody,
within 24 hours,to demonstrate the existing turbidity level in the receiving waterbody was not
increased.All data shall be reported on the DMRs. (See 15A NCAC 2B .0211 (21)). See Special
Condition A. (7.).
4. Chloride shall be monitored quarterly in conjunction with toxicity testing.
Footnotes continued next page
• 3 of 8

Permit NC0000361
Footnotes continued from A. (1.)Effluent Limitations and Monitoring Requirements
5. Whole effluent toxicity will be evaluated using Chronic Toxicity (Ceriodaphnia dubia) P/F test at
10% during the months of February,May,August,November. See section A. (2.).
6. Effluent hardness should be performed in conjunction with testing for hardness dependent metals
(cadmium, copper, lead,nickel, silver, zinc).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2) CHRONIC TOXICITY PERMIT LIMIT (QUA'S ELY)
[15A NCAC 02B.0200 et seq.]
The effluent discharge shall at no time exhibit observable mhibi to p of reproduction or
significant mortality to Ceriodaphnia dubia at . ent concen ltiAn of 10%.
The permit holder shall perform at a minimum, c arterl monitoring using est procedures
outlined in the "North Carolina Ceriodaphnia Chronic EfflueBioassay Pr�cex ure,"Revised
December 2010, or subsequent versions or"North C'r in
q ar� aPhase II Chronic*We Effluent
Toxicity Test Procedure" (Revised-=Dece ber 2010) or`su equent versions. The tests will be
performed during the months of February, VI'ay,August,hd November. These months
signify the first month of each three-mote toesting quer assigned to the facility.
Effluent sampling for th testing must be obtaindmArepreMative effluent discharge and
shall be perfoinied at th = I' a Spermitted ',al eft uens„elhargeelow all treatment
processes.
If the test procedure perfo'i i e a tliSst tes "any single quarter results in a failure or
ChV bel .t�e it limit,40,multipac. ncentration testing shall be performed at a
minimum in each of t e-two fo lowing monthsas described in "North Carolina Phase II
Chrome, hole Effluent ° oxici I.est Procedure" (Revised-December 2010) or subsequent
versions.All toxicity testin esults required as part of this permit condition will be entered on the Effluent
Discharge Monitoringorm (MRi) for the months in which tests were performed, using the
parameter code TGP3B for the p ss/fail results and THP3B for the Chronic Value. Additionally,
DWR Form AT-3 (original , o be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh,NC 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later
than 30 days after the end of the reporting period for which the report is made.
4 of 8

Permit NC0000361
Test data shall be complete, accurate, include all supporting chemical/physical measurements
and all concentration/response data, and be certified by laboratory supervisor and ORC or
approved designate signature. Total residual chlorine of the effluent toxicity sample must be
measured and reported if chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity
monitoring is required, the permittee will complete the information located at the top of the
aquatic toxicity(AT) test form indicating the facility name,permit number, pipe number, county,
and the month/year of the report with the notation of"No Flow"in the comment area of the
form. The report shall be submitted to the Water Sciences Section at the address cited above.
/ f
Should the permittee fail to monitor during a month in which toxicity monitoring is required,
monitoring will be required during the following month. Assessment of toxicity compliance is
based on the toxicity testing quarter, which is the three'month time interval that begins on the
first day of the month in which toxicity testing is,tequired by this permit and continues until the
final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Water Resources indicate potential impacts'tothe receiving stream, this permit may
be re-opened and modified to include alternate monitoring requirements or limits:"
NOTE: Failure to achieve test conditions'as specified in the cited.document, such as minimum
control organism survival,Jminimum control organism reproduction, and appropriate
environmental controls,"shall_constitute an invalid test and will require immediate follow-up
testing to be completed no'later than the last'dayFof the/month following the month of the initial
monitoring. .ti
rr I
A. (3.) /BfOCIDES-[G.S. 143-215.1(b)]
The permittee shall obtain authorization from the Division of Water Resources prior to utilizing
any new biocide in cooling water to be;discharged. The permittee shall notify the Director in
writing,not later than ninety'(90),days lirioi.to instituting the use of any additional biocide used
in cooling systems,which may be`toxic to aquatic life other than those previously reported to the
Division of Water Resources. Such notification shall include completion of Biocide Worksheet
Form 101 and a map locating the discharge point and receiving stream.No chromium, zinc, or
copper shall be added to the'treatment system except pre-approved additives to biocidal
compounds. /
A. (4.) WASTEWATER DIVERSION [G.S. 143-215.1(b)]
Diversion or bypassing of untreated wastewater from the treatment facility is prohibited.
A. (5.) SOLIDS REMOVAL [G.S. 143-215.1(b)]
Solids removed or resulting from the wastewater treatment process shall be contained and
disposed of in such a manner as to prevent any contamination of the surface waters of the State.
5 of 8

Permit NC0000361
A. (6.) FLUORIDE REOPENER [G.S. 143-215.1(b)]
This permit shall be modified, or revoked and reissued to incorporate new fluoride effluent
limitations in the event that acute or chronic bioassay testing or other studies results in a change
in the North Carolina Water Quality Standard for fluoride.
A. (7.) TURBIDITY REOPENER [G.S. 143-215.1(b)]
This permit shall be modified, or revoked and reissued to incorporate new turbidity effluent
limitations in the event that violations of the turbidity standard of the North Carolina Water
Quality Standard occur as a result of this discharge.
A. (8.) PERMIT MODIFICATIONS [G.S. 143-215.1 b)] 7
This permit shall be modified, or revoked and reissued toincorp`orate new limitations in the
event that production changes are requested or should'any new fluoride using discharge request
to locate on the North Toe River. f
A. (9.) ELECTRONIC REPORTING OF MONITORING REPORTS\`E..
[G.S. 143-215.1(b)] %
Federal regulations require electronic submittal of all disc1i rge monitoring reports (DMRs) and
program reports. The final NPDES Electronic Reporting Rule�wTs adopted and became effective
on December 21, 2015.
NOTE: This special condition supplements nor-supersedes.the following sections within Part II of
this permit(Standard Conditions for,NPDES Pests) ` .
• Section B. (11.) ,Signatory Requirements
• Section D..(2), Reporting �` .
• /Section D. (6.) -Records Retention ..t'`
4
• ` Section E. (5.) ' -Monitoring Reports
1. Reporting Requirements'[Snpersedes'Section D. (2.) and Section E. (5.) (a)1
The permittee•shall report discharge monitoring data electronically using the NC DWR's
Electronic Discharge Monitoring Report(eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each
month and submitted electronically using eDMR. The eDMR system allows permitted
facilities to enter monitoring data and submit DMRs electronically using the internet. Until
such time that the state's eDMR application is compliant with EPA's Cross-Media Electronic
Reporting Regulation (CROMERR), permittees will be required to submit all discharge
monitoring data to the state electronically using eDMR and will be required to complete the
eDMR submission by printing, signing, and submitting one signed original and a copy of the
computer printed eDMR to the following address:
NC DEQ/Division of Water Resources/Water Quality Permitting Section
6 of 8

Permit NC0000361
ATTENTION: Central Files
1617 Mail Service Center
Raleigh,North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the
facility being physically located in an area where less than 10 percent of the households have
broadband access, then a temporary waiver from the NPDES electronic reporting
requirements may be granted and discharge monitoring data may be submitted on paper
DMR forms (MR 1, 1.1, 2, 3) or alternative forms approved by the Director. Duplicate
signed copies shall be submitted to the mailing address"above. See "How to Request a
Waiver from Electronic Reporting" section below. `
Regardless of the submission method, the first DMR'is.due on the last day of the month
following the issuance of the permit or in the cae-of a new facility, on the last day of the
s.
month following the commencement of discharge:
Starting on December 21, 2020, the permittee must electronically-report the following
compliance monitoring data and reports, when applicable: N
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act(CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to
Request a Waiver froth'Electronic Reportirig',.'•section below).
2. Electronic Submissions
j r
In accordance with 40-CFR-122.41_(1)( ), the'permittee must identify the initial recipient at
the time of each electronic submission. The, permittee should use the EPA's website
resources to identify the initial.recipient forthe'electronic submission.
Initial 'recipient of electronic NPDES information from NPDES-regulated facilities means the
entity (EPA Or the state authorized liy"EPA to implement the NPDES program) that is the
designated entity for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool
for each type of electronic-submission and for each state. Instructions on how to access and
use the appropriate electronic reporting tool will be available as well. Information on EPA's
NPDES Electronic Reporting Rule is found at:
https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-pollutant-
discharge-elimination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the"Reporting Requirements" section
above.
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Permit NC0000361
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To
obtain an electronic reporting waiver, a permittee must first submit an electronic reporting
waiver request to the Division. Requests for temporary electronic reporting waivers must be
submitted in writing to the Division for written approval at least sixty (60) days prior to the
date the facility would be required under this permit to begin submitting monitoring data and
reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon
expire. At such time, monitoring data and reports shall be submitted electronically to the
Division unless the permittee re-applies for and is granted a new temporary electronic
reporting waiver by the Division. Approved electronic reporting waivers are not
transferrable. Only permittees with an approved,-reporting waiver request may submit
monitoring data and reports on paper to the Division:for.•the period that the approved
reporting waiver request is effective. <<
Information on eDMR and the application foy'a temporary electronic reporting waiver are
found on the following web page:I , `
http://deq.nc.gov/about/divisions/water-resourcesiedm -
r./
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B.
(11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in
Part II, Section B. ,(l 1.)(a) or by a!duly, authorized representative of that person as described
in Part II, Section B: (11)(b): A person,'•and not a`position, must be delegated signatory
authority for eDMR reporting purposes. �.
•
For eDMR_submissio`ns, the person signing °and submitting the DMR must obtain an eDMR
user account and login credentials to,access the eDMR system. For more information on
North Carolina's eDMR system, registeringfor;eDMR and obtaining an eDMR user account,
please visit the following web pag :
http://deq.nc:gov/about/di'visions/w,ater-resources/edmr
Certification. .Any person submitting an electronic DMR using the state's eDMR system
shall make the following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF
CERTIFICATION`WILL`BE-ACCEPTED:
"I certify, under penalty`-of law, tht this document and all attachments were prepared under
my direction or supervision in ac ordance with a system 'designed to assure that qualified
personnel properly gather and ev Iluate the information submitted. Based on my inquiry of
the person or persons who mance 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.1I am aware that there are significant penalties for
submitting false information, including the possibility of fines and imprisonment for knowing
violations."
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Permit NC0000361
5. Records Retention [Supplements Section D. (6.)1
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR
submissions. These records or copies shall be maintained for a period of at least 3 years from
the date of the report. This period may be extended by request of the Director at any time [40
CFR 122.41].
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NC0000361 — Schoolhouse Quartz Facility ',..
Facility
Latitude: 35°56'20" Sub-Basin: 04-03-06 T
Longitude: 81°59'45" Location
USGS Quad: Linville Falls,N.C.
Stream Class: C-Trout
Receiving Stream: North Toe River Ar_ l� Avery County
✓V( L Map not to scale