NC0004626_Draft Permit_20171004

Water Resources
ENVIRONMENTAL QUALITY
October 4, 2017
Ms. Brigette Tinsley
PPG Industries Fiber Glass Products, Inc.
473 New Jersey Church Road
P.O. Box 949
Lexington, North Carolina 27293
Dear Ms. Tinsley:
ROY COOPER
Gove/7101
MICHAEL S REGAN
Sect etmy
S JAY ZIMMERMAN
D1 ectol
Subject: Draft NPDES Permit Renewal
Permit NC0004626
Lexington Plant
Davidson County
Class 3 Facility
SIC Code 3229
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
• Monitoring frequency has been reduced to quarterly for BOD, TSS and fecal coliform, and
bi-monthly for Total Residual Chlorine in accordance with EPA Guidance for Monitor
Frequency Reduction [See A. (1)].
Limit for total selenium has been removed from the permit based on no reasonable potential
to exceed water quality standards. However, since selenium is still a pollutant of concern,
and reported data were not consistent with the DWR's Practical Quantitation Limit (PQL)
at 1 µg/L, quarterly monitoring was added in the permit, and future sampling for selenium
should sample down to the lower reporting level which is < 1 µg/L [See A. (1)].
Quarterly monitoring for total cadmium and total thallium has been removed from the
permit based on no reasonable potential to exceed water quality standards [See A. (1)].
• Quarterly monitoring for total mercury has been removed from the permit based on the
Mercury TMDL evaluation [See A. (1)].
State of North Carolina I Environmental Quality I Water Resources
1617 Mall Service Center I Raleigh, North Carolina 27699-1617
919 807 6300

Page 12
• Effluent data for fluoride sl=owed reasonable potential to exceed allowable NC Water
Quality Standard. Therefore, limits and monthly monitoring requirement for total fluoride
have been added to the permit [See A. (1)]. In addition, a Compliance Schedule has been
added to the permit for implementing fluoride limits compliance [See A. (3)].
• Effluent data for copper showed reasonable potential to exceed allowable discharge
concentrations; However, due to limited number of data, quarterly monitoring for total
copper was added to the permit [See A. (1)].
• Upstream and effluent hardness quarterly monitoring has been added to the permit as
required by the implementation of the new dissolved metal standards [See A. (1)].
• The narrative was updated in Special Condition A. (2) Chronic Toxicity Permit Limit,
please review each paragraph carefully.
• 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 final NPDES permit [See A. (4)].
• Regulatory citations have been added to the permit.
• 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.
http://ncdenr.s3.amazonaws com/s3fs-
public/Water%20Quality/Surface%2OWater%2OProtection/NPDES/MIS C/NPDES %2OSt
andard%20Conditions-Boilerplate-DWR-S WP-NPDES-20150410.pdf
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Davidson County area, soliciting public comments on this draft permit.
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 period, the Division will review all pertinent comments
and take appropriate action prior to issuing a final permit. If you have questions concerning this
draft permit, please call me at [phone] or by email at [e-mail].
Sincerely,
Bing Bai, Engineer
NPDES Complex Permitting Unit

Page 13
Hardcopy: NPDES Files
Ecopy: US EPA Region 4
DWR/Aquatic Toxicology Branch/Susan Meadows
DWR/Winston-Salem Regional Office / Water Quality
DWR/Operator Certification Program/Maureen Kinney

Permit NC0004626
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,
PPG Industries Fiber Glass Products, Inc.
is hereby authorized to discharge wastewater from a facility located at the
Lexington Manufacturing Facility
473 New Jersey Church Road
Lexington, North Carolina
Davidson County
to receiving waters designated as the North Potts Creek in the Yadkin -Pee Dee River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, H, III and IV hereof
This permit shall become effective xxxx, 2017
This permit and authorization to discharge shall expire at midnight on May 31, 2022
Signed this day xxxx, 2017
Draft
S Jay Zmunerman, P G , Director
Division of Water Resources
By Authonty of the Environmental Management Commission
Page 1 of 9

Permit NC0004626
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.
PPG Industries Fiber Glass Products, Inc. is hereby authorized to:
1. Continue to operate an existing 0 6 MGD wastewater treatment facility consisting of the following
components:
• Mechanical bar screen
• Commmutor
• Equalization basin
• Chemical mixing tanks
• Primary clarifier
• Nutrient addition
• Dual aeration basins
• Final clarifiers
• Sodium hypochlorite with chlorine contact chamber
• De -chlorination system
• Backup clarifier system
• Dual activated carbon adsorption units with pH adjustment
• Backwash equalization basin
• Belt dewatering press
• Sludge holding
The facility is located at PPG's Lexington manufacturing facility on 473 New Jersey Church Road in
Lexington, Davidson County.
2. Discharge from said treatment works at the location specified on the attached map into the North Potts
Creek currently classified as C waters in subbasin 03-07-04 [HUC 03040103] of the Yadkin -Pee Dee
River Basin
Page 2 of 9

Permit NC0004626
Part I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B.0400 et seq , 15A NCAC 02B.0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is
authorized to discharge treated wastewater from Outfall 001 Such discharges shall be limited and monitored'
by the Permittee as specified below
Effluent Characteristics
Discharge Limitations
Monitoring Requirements
Monthly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location
Parameter Code
Flow 50050
0 6 MGD
Continuous
Recording
Influent or Effluent
BOD, 5 -day, 20°C
80082
157 lbs/day
314 lbs/day
Quarterly
Composite
Effluent
(April 1 — October 31)
BOD, 5 -day, 20°C
80082
3141bs/day
6301bs/day
Quarterly
Composite
Effluent
(November 1 — March 31)
Total Suspended Solids
C0530
105 lbs/day
168 lbs/day
Quarterly
Composite
Effluent
(April 1 — October 31)
Total Suspended Solids
C0530
1461bs/day
292 lbs/day
Quarterly
Composite
Effluent
(November 1 — March 31)
Fecal Coliform
31616
200/100ml
400/100m1
Quarterly
Grab
Effluent
(geometric mean)
NH3 as N (mg/L) C0610
Weekly
Composite
Effluent
pH 00400
Between 6 0 and 9 0 s.0
Weekly
Grab
Effluent
Total Residual Chlorine 2 50060
28 0 gg/L
Bi -monthly
Grab
Effluent
Total Fluoride 3 00951
3.7 mg/L
45 7 mg/L
Monthly
Composite
Effluent
Oil and Grease 00556
30 0 mg/L
60 0 mg/L
Sena -annually
Grab
Effluent
Temperature (°C) 00010
Weekly
Grab
Effluent
Total Kjeldahl Nitrogen 00625
Weekly
Composite
Effluent
(TKN) (mg/L)
NO2+NO3 (mg/L) 00630
Weekly
Composite
Effluent
Total Phosphorus (mg/L) C0665
Weekly
Composite
Effluent
Total Copper 01042
Quarterly
Composite
Effluent
Total Selenium 01147
Quarterly
Composite
Effluent
Hardness- Total as
[CaCO3 or (Ca + Mg)] 00900
Quarterly
Composite
Effluent
(mg/L)
Hardness- Total as
[CaCO3 or (Ca + Mg)] 00900
Quarterly
Grab
Upstream 4
(mg/L)
Chronic Toxicity 5 TGP3B
Quarterly
Composite
Effluent
Footnotes:
The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see A (4)]
Page 3 of 9

Permit NC0004626
2. Total residual chlorine shall be monitored only if chlorine is added to the treatment process. The
Division shall consider all effluent TRC values reported below 50 gg/L to be in compliance with the
permit. However, the permittee shall continue to record and submit all values reported by a North
Carolina certified laboratory.
3 The linut becomes effective 42 months from permit effective date This compliance schedule is provided
to allow the facility to budget, design, and build the treatment system to comply with the new water
quality -based limit [See A. (3)]
4 The permittee shall sample instream hardness upstream of the facility's discharge The sample shall be
representative of the hardness in the receiving stream. If the permittee is a member of a monitoring
coalition program, sampling for instream hardness may be waived as long as the monitoring coalition
agrees to sample hardness at the nearest upstream location, at a minimum frequency of quarterly, and the
permittee has obtained approval from DWR-NPDES Permitting Unit that the upstream station being
monitored by the Coalition is representative of the receiving stream for this discharge. The permittee is
responsible for submitting instream hardness test results with its permit renewal application package If
Coalition membership is cancelled or the Coalition terminates instream hardness sampling at the
approved station, the permittee will immediately notify the Division and resume sampling for instream
hardness upstream of its discharge
5. Chronic Toxicity (Ceriodaphnaa) limit at 48% with testing in February, May, August, and November
[see A. (2)].
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (2) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B.0200]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 48%.
The permit holder shall perform at a minunum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnaa Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised- December 2010) or
subsequent versions The tests will be performed during the months of February, May, August, and November.
These months signify the first month of each three-month toxicity testing quarter assigned to the facility Effluent
sampling for this testing must be obtained during representative effluent discharge and shall be performed at the
NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the
permit limit, then multiple -concentration testing shall be performed at a minimum, in each of the two
following months as described in "North Carolina Phase H Chronic Whole Effluent Toxicity Test
Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR -1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT -3 (original) is to 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
Page 4 of 9

Permit NC0004626
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.
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.
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 required
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 to the 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, minimum 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 day of the month
following the month of the initial monitoring.
A. (3) FLUORIDE COMPLIANCE SCHEDULE
[G.S. 143-215.1(b)]
To allow the Permittee to isolate the source, evaluate the best process change or treatment method, and then
implement the necessary action, fluoride limits will take effect 42 months from permit effective date. The
Permittee must complete each milestone and submit a written status report on the milestone date. Non -submittal by
the milestone date will be considered out of compliance and subject to enforcement action
1) MILESTONE I —COMPLETION OF THE EVAL UA TION PROCESS — 15 months from effective date
Permittee to complete a study of all fluoride sources and their impact to the influent, and any plant process
changes that will reduce influent fluoride concentrations In addition, Permittee to complete a treatability
analysis for any further fluoride reduction that may be required, and identify the process changes and/or the
proposed treatment design for meeting the fluoride limits Permittee to prepare the final engineering details for
the proposed treatment design
2) MILESTONE 2 —COMPLETION OF CONSTRUCTION— 33 months from effective date
Permittee to acquire funding, select contractors, obtain any other permits, and complete constructions of any
required actions, internal changes or additional treatment, identified in Milestone 1
3) MILESTONE 3 —COMPLETION OF OPTIMIZATION— IN COMPLIANCE — 42 months from effective date
Permittee to complete start-up, optimization, and debugging of new treatment equipment and process changes
Fluoride limits are enforced.
Page 5 of 9

Permit NC0004626
Reports to include owner's name, NPDES permit number, and Permittee contact person. Reports to be renutted to:
(1) NCDEQ/Water Quality
NPDES Permitting
1617 Mail Service Center
Raleigh, NC 27699-1617
(2) NCDEQ/Water Quality
Winston-Salem Regional Office
450 West Hanes Mill Road, Suite 300
Winston-Salem, NC 27105
A. (4) ELECTRONIC REPORTING OF MONITORING REPORTS
[G. S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program reports.
The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015.
NOTE This special condition supplements or supersedes the following sections within Part II of this permit
(Standard Conditions for NPDES Permits):
• Section B (11 ) Signatory Requirements
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Reporting
Records Retention
Monitoring Reports
1. Reportiny_ Requirements (Supersedes 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) interni 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
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 case of a new facility, on the last day of the month following the commencement of
discharge.
Page 6 of 9

Permit NC0004626
Starting on December 21, 2020, the permittee must electronically report the following compliance monitoring
data and reports, when applicable:
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 from
Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), 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
for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity (EPA or
the state authorized by 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.federalre ig ster.gov/documents/2015/10/22/2015-24954/national-pollutant-discharge-elimination-
system-npdes-electronic-reportmg-rule
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
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 for a temporary electronic reporting waiver are found on the
following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Page 7 of 9

Permit NC0004626
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. (11.)(a) or by a duly authorized representative of that person as described in Part H, Section B. (11.)(b) A
person, and not a position, must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions, 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,
registering for eDMR and obtaining an eDMR user account, please visit the following web page:
http://deq nc gov/about/divisions/water-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:
7 cert, 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 false information, including the possibility of fines and imprisonment for knowing violations. "
5. Records Retention [Supplements Section D. (6.)]
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 D --rector at any time [40 CFR 122.41].
Page 8 of 9

Permit NC0004626
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PPG Industries/ Lexington Facility — NC0004626 Facility w
Location
USGS Quad Name: Southmont Lat.: 35°44'18"
Receiving Stream: North Potts Creek Long.: 80°19'32"
Stream Class: C NorthIF Not to SCALE
Subbasin: Yadkin -Pee Dee 03-07-04 HUC: 03040103