NC0006033_Permit Issuance_20170315 (2)

Ki.r`0
Water Resources
ENVIRONMENTAL QUALITY
March 15, 2017
Ms. Stephanie Scheringer, Division Manager, Wastewater Treatment
Two Rivers Utilities
P.O. Box 1748
Gastonia, North Carolina 28053
Dear Ms. Scheringer:
ROY COOPER
Goeemor-
MICHAEL S. REGAN
SeerelnrT
S. JAY ZIMMERMAN
Direclor
Subject: Final NPDES Permit Renewal
Permit NC0006033
Eagle Road WWTP
Gaston County
Class IV Facility
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES 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).
In response to your comments on the draft permit the permit was modified as follows:
• Based on the permitted flow the facility is classified as Class IV. 15A NCAC 08G .0302
(d) states that systems utilizing an activated sludge or fixed growth process with a
permitted flow greater than 2.5 million gallons per day (mgd) are assigned a classification
of Grade IV Biological Water Pollution Control System.
• The address for the facility was corrected in the permit.
• The emergency storage basin was added to the components of the treatment system.
• The monitoring frequency for BOD, TSS, ammonia and fecal coliform was reduced to
2/week.
• Standard conditions are the same as the previous permit.
This final permit contains the following changes from your previous permit:
• Mass limits for total nitrogen and total phosphorus were added to the permit. The
allocation and limits for the Long Creek WWTP and the Eagle Road WWTP were
combined in a bubble limit. The summer TN limits were calculated based on the 6 mg/1
concentration limit established by the Lake Wylie TMDL. The winter TN limits were
calculated based on 12 mg/1. The annual TP limit was calculated based on I mg/l limit in
the TMDL.
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, Noah Carolina 27699-1617
919 807 6300

e
• Sampling frequency for the effluent pollutant scan was modified to three times during the
permit cycle. See Special Condition A. (8). This condition was also modified to add
narrative for four seasonal 2nd species toxicity tests.
• Conductivity monitoring was removed from the monitoring requirements.
• Based on a reasonable potential analysis the limits and monitoring for Phenols were
removed from the permit.
• Effluent hardness and instream hardness sampling, upstream of the discharge, has been
added to this permit at a monitoring frequency of quarterly. See Sections A.(1) Effluent
Limitations and Monitoring Requirements and A. (3) Instream Sampling.
• A mercury evaluation was conducted in accordance with the Permitting Guidance
developed for the implementation of the statewide Mercury TMDL to determine the need
for a limit and/or a Mercury Minimization Plan (MMP). No limit is required but you will
be required to develop a MMP. See Special Condition A. (10).
• 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. The requirement to begin 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 Special Condition A (9).
For information on eDMR, registering for eDMR and obtaining an eDMR user account,
please visit the following web page: http://deq.nc.gov/about/divisions/water-
resources/edmr.
For more information on EPA's final NPDES Electronic Reporting Rule, please visit the
following web site:
http://www2.epa.gov/compliance/final-national-pollutant-discharge-elimination-system-
npdes-electronic-reporting-rule.
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 demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect
the legal requirements to obtain other permits which may be required by the Division of Water
Resources or any other Federal, State, or Local governmental permits that may be required.
2

If you have any questions concerning this permit, please contact Teresa Rodriguez at telephone
number [phone] or at email [e-mail].
Sincerely,
a' y Zimmerm�
lector, Division of Water Resources NCDE
Q
Hardcopy: NPDES Files
Central Files
DWR/Mooresville Regional Office / Water Quality
Ecopy: US EPA Region 4
DWR/Aquatic Toxicology Branch/Susan Meadows

Permit NC0006033
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,
City of Gastonia
is hereby authorized to discharge wastewater from a facility located at the
Eagle Road WWTP
661 Eagle Road
Belmont
Gaston County
to receiving waters designated as the South Fork Catawba River in the Catawba 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.......................................................................................................... April 11 2017.
This permit and authorization to discharge shall expire at midnight on ................................... January 31, 2020.
Signed this day ...........................March 15, 2017
IrS. J Zimmerman,'ffke6tbf
D ' ion of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 12

Permit NC0006033
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.
The City of Gastonia
is hereby authorized to:
1. Continue to operate an existing 4.0 MGD extended aeration wastewater treatment facility located at 661
Eagle Road, Belmont, Gaston County, and consisting of.
• influent mechanical bar screen
• emergency storage basin
• aeration basin
• dual secondary clarifiers
• chlorine contact chamber
• dechlorination
• post aeration
• backup generator
• aerobic digester; and
2. Discharge from said treatment works (via Outfall 001) into the South Fork Catawba River, a Class WS-V
water in the Catawba River Basin, at the location specified on the attached map.
Page 2 of 12

Permit NC0006033
PART I - MONITORING, CONTROLS, AND LIMITATIONS FOR PERMITTED DISCHARGES
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS [15A NCAC 02B
.0400 et seq., 02B .0500 et seq.]
(a.) During the period beginning on the effective date of the permit and lasting until expiration, the
permittee is authorized to discharge from outfall 001. Such discharges shall be limited and monitored'
by the Permittee as specified below:
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Flow
4.0 MGD
Continuous
Recording
Effluent or Influent
Total Monthly Flow
Monitor and Report
Monthly
Recorded or
Calculated
Influent or Effluent
BOD, 5-day, 20°C 2
10.0 mg/L
15.0 mg/L
2/Week
Composite
Effluent & Influent
Total Suspended Solids 2
30.0 mg/L
45.0 mg/L
2/Week
Composite
Effluent & Influent
NH3-N
4.0 mg/L
12.0 mg/L
2/Week
Composite
Effluent
Total Residual Chlorine 3
28 µg/L
Daily
Grab
Effluent
Fecal Coliform
200/100 mL
400/100 mL
2/Week
Grab .
Effluent
(geometric mean)
Dissolved Oxygen
Daily
Grab
Effluent
Temperature
Daily
Grab
Effluent
Hardness, Total as
[CaCO3 or (Ca + Mg)]
Quarterly
Composite
Effluent
mg/L
pH
? 6.0 and <_ 9.0 standard units
Daily
Grab
Effluent
TKN (mg/1) 4
Monitor and Report (mg/1)
Weekly
Composite
Effluent
NO3-N + NO2-N (mg/L) 4
Monitor and Report (mg/1)
Weekly
Composite
Effluent
TN 4
Monitor and Report (mg/1)
Weekly
Composite
Effluent
Monitor and Report (lb/mo)
Monthly
Calculated
TN Load 5,6,7
Monitor and Report (lb/season) (effective
Seasonally
Calculated
Effluent
4/1/17)
TP 4
Monitor & Report (mg/1)
Weekly
Composite
Effluent
TP 4
1.0 mg/I (monthly average)
Weekly
Composite
Effluent
(effective through 12/31/17)
Monitor & Report (lb/mo)
Monthly
Calculated
TP Load 5,6,7
Monitor and Report (lb/yr) (effective
Annually
Calculated
Effluent
i/1/18)
Chronic Toxicity 8
Quarterly
Composite
Effluent
Effluent Pollutant Scan 9
Monitor and Report
Footnote 9
Footnote 9
Effluent
Notes:
1. The permittee shall discharge monitoring reports electronically using NC DWR's eDMR application system.
See Special Condition A. (9.).
2. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15 % of the respective influent
value (85% removal).
3. The facility shall report all effluent TRC values reported by a NC certified laboratory including field
certified. However, effluent values below 50 µg/ L will be treated as zero for compliance purposes.
4. For a given wastewater sample, TN = TKN + NOrN + NOrN, where TN is Total Nitrogen, TKN is Total
Kjeldahl Nitrogen, and NO3-N and NOrN are Nitrate and Nitrite Nitrogen, respectively. TP is Total
Phosphorus.
Page 3 of 12

Permit NC0006033
5. TN or TP Load is the mass quantity of Total Nitrogen or Total Phosphorus discharged in a given period of
time. See Special Conditions A.(4.) Total Nitrogen and Total Phosphorus Limits and A.(5.) Calculation of Total
Nitrogen and Total Phosphorus Loads.
6. The facility is subject to nutrient limitations as specified in Special Condition A.(2.) Combined Limitations for
Nutrients - Outfall C01.
7. Summer is defined as April 1- October 31; winter is defined as November 1- March 31. Annual means on a
calendar year basis, January 1- December 31.
8. Chronic Toxicity (Ceriodaphnia) at 4.7%; March, June, September and December. See Special Condition A.(7.).
9. See Special Condition A.(8.), Fluent Pollutant Scan.
(b.) There shall be no discharge of floating solids or visible foam in other than trace amounts.
A.(2.) COMBINED LIMITATIONS FOR NUTRIENTS - OutfaU C01 [G.S.143-215.1(b)]
(a.) During the period beginning on the effective date of this permit or as specified below and lasting until
permit expiration, the Permittee is further authorized to discharge Total Nitrogen and Total
Phosphorus from the Long Creek WWTP (NC0020184, Outfall 001) and the Eagle Road WWTP
(NC0006033, Outfall 001) subject to the following combined load limitations:
Permit `
Fadiity.
Total Nib�ogen
(Ib/season)1,3(fib/seoson)1�[b/yr)
Total=::Nitrogen
Winter
;Total Phosphorus'
•Annual
:.
NCO020184
Long Creek WWTP
171,337
241,793
48,706
NCO006033
Eagle Road WWTP
42,834
60,448
12,176
Combined Load Limitations
214,171
302,242
60,882
Footnotes:
1. In accordance with the 1995 Lake Wylie TMDL, summer values apply April 1- October 31 and winter
values apply November 1- March 31.
2. Total Phosphorus values applies for the calendar year; January 1 to December 31.
3. All values are displayed to the nearest pound. The Combined Load Limitations may not equal the
apparent sum due to the effects of rounding the individual values.
(b.) Compliance with these limits shall be determined in accordance with Special Conditions A.(4.), Limits
for Total Nitrogen and Total Phosphorus, and A.(5.), Calculation and Reporting of Nutrient Loads.
(c.) Nutrient monitoring and reporting requirements are specified in Special Conditions A.(1.), Effluent
Limitations and Monitoring Requirements, and A.(5.), Calculation and Reporting of Nutrient Loads.
(d.) Pursuant to N.C. General Statute Section 143-215.1 and Part II, Sections B-12 and B-13 of this permit,
the Division of Water Resources (Division) may reopen the permits listed above and establish more
stringent nutrient limits upon finding that such limits are necessary to prevent the discharges from
causing localized water quality impacts in the receiving streams.
(e.) The Permittee may request that its permits be modified to rescind these combined limits and establish
individual mass discharge limits for each facility. The Division may, after written notification to the
Permittee, rescind these combined limits and establish individual mass discharge limits for each
facility.
A.(3.) INSTREAM SAMPLING [15A NCAC 02B .0500 et seq.]
Instream monitoring is required for the following parameters at the locations specified:
Page 4 of 12

Permit NCO006033
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Dissolved Oxygen
Footnote 2
Grab
U, D
Temperature
Footnote 2
Grab
U, D
Hardness
Quarterly
Grab
U
Footnotes:,
1. U: Upstream at Cramerton Bridge. D: Downstream at Upper Armstrong Bridge.
2. Instream samples shall be grab samples taken 3/week Qune-September) and 1/week (October -May).
A.(4.) TOTAL NITROGEN AND TOTAL PHOSPHORUS LIMITS [G.S.143-215.1(b)]
(a.) Total Nitrogen (TN) allocations and load limits for NPDES dischargers in the Lake Wylie watershed
are seasonal (summer and winter) values. Summer is defined as April 1 through October 31, and
winter is defined as November 1 through March 31. Total Phosphorus (TP) allocations and load limits
are annual values and apply on a calendar year basis, January 1 through December 31.
(b.) The TN (or TP) Load limit in this Permit may be modified as the result of allowable changes in the
Permittee's allocation.
(i.) Allowable changes include those transfers resulting from the purchase, sale, trade, or lease of
allocation between the Permittee and other dischargers assigned allocation under the 1995 Lake
Wylie TMDL; regionalization (if both facilities were assigned allocation); and other transactions
approved by the Division
(ii.) The Permittee may request a modification of the TN (or TP) Load limit in this Permit to reflect
allowable changes in its allocation.
(A) The request must include an analysis demonstrating that change in allocations and limits
does not have a reasonable potential to cause localized water quality impacts.
(B) Upon receipt of timely and proper application, the Division will propose to modify the
permit as appropriate and in accordance with state and federal program requirements.
(C) Changes in TN or TP limits become effective on the first January 1(annual limit), the first
April 1(summer limit), or the first November 1(winter limit) following permit
modification. The Division must receive application no later than 180 days prior to the
requested effective date for any limit change.
(iii.) Any requests for modification should be sent to:
NCDEQ/ DWR/ NPDES Programs
1617 Mail Service Center
Raleigh, NC 27699-1617
A.(5.) CALCULATION AND REPORTING OF TOTAL NITROGEN AND TOTAL
PHOSPHORUS LOADS [G.S.143-215.1(b)]
(a.) The Permittee shall calculate monthly, seasonal, and annual TN (or TP) Loads as follows:
(L) Monthly TN (or TP) Load (lb/mo) = TN (or TP) x TMF x 8.34
where:
TN or TP the average Total Nitrogen or Total Phosphorus concentration
(mg/L) of the composite samples collected during the month
TMF the Total Monthly Flow of wastewater discharged during the
month (MG/mo); that is, the sum of daily flows in the month
8.34 conversion factor, from (mg/L x MG) to pounds
(ii.) Summer TN Load (lb/ summer) = Sum of the April - October Monthly TN Loads for the season
Page 5 of 12

Permit NC0006033
(iii.) Winter TN Load (lb/winter) = Sum of the November - March Monthly TN Loads for the season
(iv.) Annual TP Load (lb/yr) = Sum of the 12 Monthly TP Loads for the calendar year
(b.) The Permittee shall report monthly Total Nitrogen and Total Phosphorus results (mg/L and lb/mo) in
the appropriate discharge monitoring report for each month: the summer TN results with the October
DMR; the winter TN results with the March DMR; and each calendar year's results with the December
report for that year.
(c.) In the case of combined nutrient limits (see Special Condition A.(2.)):
(i.) The Permittee shall report each facility's monthly TN and TP effluent loads in the discharge
monitoring report for that facility.
(ii.) The Pernuttee shall report the seasonal or annual combined loads in the discharge monitoring
reports for the Long Creek WWTP.
(d.) Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical
errors) or any change in status of any of the listed allocations shall be considered a major modification
of this permit and shall be subject to the public review process afforded such modifications under
state and federal rules.
A.(6.) NUTRIENT ALLOCATIONS [G.S.143-215.1(B)]
(a.) The following table list the Total Nitrogen (TN) and Total Phosphorus (TP) allocations assigned to,
acquired by, or transferred to the Permittee in accordance with the 1995 Lake Wylie TMDL and
nutrient management strategy and the status of each as of permit issuance. For compliance purposes,
this table does not supersede any TN or TP limit established elsewhere in this permit.
Total Nitrogen Allocation
_
A.77
-. -' -
f A
f
Base
TMDL 1
1995
42,834 lb/season
60,448 Ib/yr
Active
Total Allocabon
42,834 lb/season
60,448 lb/yr
Active
Footnotes:
1. Summer is defined as April 1- October 31. Winter is defined as November 1- March 31.
Total Phosphorus Allocation
Af.�.00AMIO
.�D SC O*
-
TYPE
"SOURCEAIE
'�"
Base
TMDL
1995
12,176lb/yr
Active
Total Allocation
12,176 lb/yr
Active
Footnotes:
1. Annual means on a calendar year basis, January 1- December 31.
(b.) Any addition, deletion, or modification of the listed allocation(s) (other than to correct typographical
errors) or any change in status of any of the listed allocations shall be considered a major modification
of this permit and shall be subject to the public review process afforded such modifications under
state and federal rules.
A.(7.) CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) [15A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality
to Ceriodaphnia dubia at an effluent concentration of 4.7 %.
Page 6 of 12

Permit NC0006033
The permit holder shall perform at a minimum, agtt rtemonitoring using test procedures outlined in the
"North Carolina Ceriodaphnia 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 March, June, September,
and December. 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 II 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
1623 Mail Service Center
Raleigh, NC 27699-1623
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.(8.) EFFLUENT POLLUTANT SCAN [G.S.143-215.1(b)]
(a.) The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below.
One scan must be performed in each of the following years: 2017, 2018, and 2019. Analytical methods
shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether
Page 7 of 12

Permit NC0006033
parameters are present in concentrations greater than applicable standards and criteria. Samples
should be collected with one quarterly toxicity test each year, and must represent seasonal variation
[i.e., do not sample in the same quarter every year]. Unless otherwise indicated, metals shall be
analyzed as "total recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
OIl and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (EPA Method 1631E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
volatile oroanic compounds;
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethyhrinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichioropropane
1,3-dichioropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Adl-extracWle c�on�oounds;
P-chloro-m-cresol
2-chiorophenol
2,4-dichlorophenoi
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Rase neatra/ rn=vvunds;
Acenaphthene
Acehaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chioroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chioroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-odyi phthalate
Di benzo(a, h)a nthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadlene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-n itrosod i-n-pro pyla m i ne
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
(b.) Reporting. Test results shall be reported on DWR Form -A MR-PPA1(or in a form approved by the
Director) by December 31st of each designated sampling year. The report shall be submitted to the
following address: NCDEQ/ DWR/ Central Files,1617 Mail Service Center, Raleigh, North
Carolina 27699-1617.
(c.) Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that
Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also
subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.210)(5).
The US EPA requires four (4) toxicity tests for a test organism other than the test species currently
required in this permit. The multiple species tests should be conducted either quarterly for a 12-
month period prior to submittal of the permit renewal application, or four tests performed at least
annually in the four and one half year period prior to the application. These tests shall be performed
for acute or chronic toxicity, whichever is specified in this permit. The multiple species toxicity test
results shall be filed with the Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
Page 8 of 12

Permit NC0006033
1623 Mail Service Center
Raleigh, North Carolina 27699-1623
(d.) Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E
(Toxicity Testing Data) of EPA Municipal Application Form 2A, when submitting the permit renewal
application to the NPDES Permitting Unit.
A.(9.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[G.S.143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports and specify that, if a state does not establish a system to receive such submittals, then permittees
must submit monitoring data and reports electronically to the Environmental Protection Agency (EPA). 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.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements Lftersedes Section D. (2.) and Section E. (5.) (a)j
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
ATTENTION: Central Files
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.
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
Page 9 of 12

Permit NC0006033
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 122.410)(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: http://www2.epa.gov/compliance/final-national-pollutant discharge -elimination
system-npdes-electronic-reporting-rule.
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Request a Waiver from Electronic Reps
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
4. Signatory Requirements fSupplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)l
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 II, 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:
"I certify, 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
Page 10 of 12

Permit NC0006033
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 NuHRplements 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 Director at any time [40 CFR 122.41].
A.(10.) MERCURY MINIMIZATION PLAN [G.S.143-215.1(b)]
The permittee shall develop and implement a mercury minimization plan during this permit term. The
MMP shall be developed within 180 days of the NPDES Permit Effective Date, and shall be available for
inspection on -site. A sample M P was developed through a stakeholder review process and has been
placed on the Division website for guidance (hft://Rortal.ncdenr.org/web/wg/myR/Rslngdes under
Model Mercury Minimization Plan). The MMP should place emphasis on identification of mercury
contributors and goals for reduction. Results shall be 'summarized and submitted with the next permit
renewal. Performance of the Mercury Minimization Plan will meet the requirements of the TMDL (Total
Maximum Daily Load) for mercury approved by USEPA on October 12, 2012, unless and until a Waste
Load Allocation specific to this facility is developed and this NPDES permit is amended to require
further actions to address the Waste Load Allocation.
Page 11 of 12

Permit NC0006033
1'
k ✓ .�
r � �
Si
isal, �`, v Outfall 001
7T,
I < c I ` ALf ,1 .<' f t� I;i1 f .�I ♦ •\g{ - �+e �.
Eagle Road WWTP—NC0006033 Facility Location (not to scale)
Receiving Stream: South Fork Catawba River Stream Class: WS-V _
Drainage Basin: Catawba River Basin Sub -Basin: 03-08-36 ^'
Permitted Flow: 4 MGD HUC:0305010206 I V
State Grid/USGS Quad: FUSE/Mount Holly Latitude 35' 14' 01" Longitude 91' 03' 52"
Page 12 of 12

Ms. Teresa Rodriguez
NPDES Complex Permitting Unit
Division of Water Resources
1617 Mail Service Center
Raleigh, NC 27699-1617
Re: Draft NPDES Permit Renewal
Permit N00006033
Eagle Road WWTP
Gaston County
Dear Ms. Rodriguez:
RECEIVED/NCDS00WR
FER 21 Z0117
Pennit�Nng ua�e*n
Thank you for sending the draft of Eagle Road WWTP's renewed NPDES permit which we received
February 2, 2017. We have reviewed this draft, and appreciate the thorough preparation and the
changes that were made in limits and monitoring frequencies following the data review. In
accordance with your request, we would like to submit the following comments for potential
modifications forthe final permit:
�n the cover letter, Eagle Road is listed as a Class IV Facility instead of a Class III facility as it has
previously been identified.
• The address for the Eagle Road WWTP should be listed as 661 Eagle Road, Belmont on pages 1
and 2.
• The currently active permit lists the "flow equalization basin" which is not included in the
Xreatment components list on page 2 of the draft permit. While this basin is only rarely utilized,
f/ we ask that it to remain included in the permit. "Emergency storage basin" may be a more
appropriate name for the basin since it is not set up for regular use.
• "DWQ Guidance Regarding the Reduction of Monitoring Frequencies in NPDES Permits for
/ Exceptionally Performing Facilities" states that facilities meeting the requirements may have
/ monitoring reduced to 2/week. The Eagle Road WWTP met the requirements for BOD, TSS,
VVV ammonia and fecal coliform, but monitoring was only reduced to 3/week. We respectfully ask
that the minimum requirement for this monitoring be reduced to 2/week.
• Standard Conditions were not included with the draft permit. We do not have any comments
Standard Conditions if version 11/09/2011.1 is included.

We appreciate DWR's work on this permit and have no other comments on the draft at this time. If I
can be of any assistance please feel free to contact me at 704-866-6726 or email at
[e-mail].
Sincerely,
Stephanie Scheringer
Division Manager Wastewater Treatment
Two Rivers Utilities
CC: Hubert Hampton III, ORC Eagle Road WWTP
CERTIFIED MAIL: 7014 0150 0002 0276 0852

Water Resources
ENVIRONMENTAL QUALITY
MEMORANDUM
To:
January 25, 2017
Clinton Cook, DWR / Regional Engineer
Mooresville Regional Office
From: Teresa Rodriguez
919.807.6387
NPDES Unit
Subject: Review of Draft NPDES Permit NC0006033
Gastonia/Eagle Road W WTP
Gaston County
ROY COOPER
C,oremoT
MICHAEL S. REGAN
Srcoamy
S. JAY ZIMMERMAN
7Nredor
Please indicate below your agency's position or viewpoint on the draft permit and return this form by February 25,
2017. If you have any questions on the draft permit, please feel free to contact me at the telephone number shown
above.
RESPONSE: (Check one)
©Concur with the issuance of this permit provided the facility is operated and maintained properly, the stated
effluent limits are met prior to discharge, and the discharge does not contravene the designated water quality
standards.
Concurs with issuance of the above permit, provided the following conditions are met:
❑ Opposes the issuance of the above permit, based on reasons stated below, or attached:
stale ofNonit Carolina I Environmental Quality I waler Retain=
1617 Mail Service Center I Raleigh, Nonh Carolina 27699.1617
919 807 6300

PUBM UTICE
North Carolina
Environmental
Management
Commission:'
NPOES Unit
1617 Mail Service AFFIDAVIT OF INSERTION OF ADVERTISMENT
Center The Gaston Gazette
Raleigh, NC
27699-1617
Notice of Intent
to Issue a
NPDES Gastonia, N.C.
Wastewater Gaston County
Permit
The North Carolina Envi-
ronmental Management
Commission 8roposes to
issue a NP gorses
The Gaston Gazette does certify that the advertisement for:
discharge permit to
the person(s) listed below.
Written comments regard-
WASTEWATER PERMIT: NC0006033, Eagle Road WWTP; NCO020184, Long Creek
ing it the proposed perm
will be accepted cord t
WWTP; NCO074268 Crowders
r
days after the publish date
of this notice. The Director
of the NC Division of Water
Resources abic uepullihearing
Measuring 9.84 inches appeared in The Gaston Gazette, a newspaper published in
should there be a signifi-
cant degree of ublic inter-
p
Gaston County, Gastonia, N.C., in issues :
est. Please mail comments
and/or information re-
quests DWR at the
above address, Interested
persons may visit the DWR
01/29/2017.
at 512 N. Salisbury Street,
Raleigh, NC to review in-
formation on file. Addi-
tional Information on
NPDES permits and this
notice may be found on our
website: hstp ddeu.nc.
gowaboutldivisio w to -
resourcestwater-resources
-permits/wastewater-branc
MMM�/abGciuli
or by calfing (919)
807-6397.
The City of Gastonia has
.applied for renewal of per-
mit NC0006033 for Eagle
Road WWTP in Gaston
charge is treatedcilitmunicpal
Name of Account: NCDENR/DWQ/NPDES
wastewater to semh Pork
Catawba River, Catawba
Order Number: 54581776
River Basin.
Ad Number: 54701813
The City of Gastonia (P.O.
Box 1748, Gastonia, NC
28053) requested renewal
of permit N00020184 for
Long Creek WWrP in
Sworn to, and subscribed before me this 30 th day of January, 2017.
Gaston County; this facility
discharge is treated munic-
Ipal wastewater to S. Fork
Catawba River, Catawba
River Basin.
The City of Gastonia re-
quested renewal of ppermit
NCO074268 for the Crowd-
ers Creek WWTP in Gas-
ton County. This permitteddischa
treated rgmunicipal PN�lE tiB"'S�S
t h/�,��p KYwI AIJ hY�.
waste w-vj
C
waterto Crowders Creek in
the Catawba River Basin. i �%'-'��
Le
Stephanie B. Sisk, Notary Public
1C-January 29, 2017. NOTARY
Text G$81778 to 56654
- pUBLIC U=
My Commission Expires March 23, 2020

DEPARTEMENT OF ENVIRONMENTAL QUALITY/DIVISION OF WATER RESOURCES
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0006033
Facility Information
Applicant/Facility Name:
Two Rivers Utilities/Eagle Road WWTP
Applicant Address:
PO Box 1748, Gastonia, NC 28053
Facility Address:
661 Eagle Road, Belmont NC 28012
Permitted Flow:
4 MGD
Type of Waste:
Domestic
Classification:
IV
Permit Status:
Renewal
County:
Gaston
Miscellaneous
Receiving Stream:
South Fork Catawba
River
Sub basin:
03-08-36
Stream Classification:
WS-V
HUC:
0305010206
303(d) Listed?
No
State Grid / USGS Quad:
G14NEBelmont
Drainage Area (mil):
635
Latitude:
35014' 01"
Summer 7Q 10 (cfs)
125
Longitude:
810 03' 52"
Winter 7Q10 cfs)
230
Regional Office:
Mooresville
Average Flow cfs :
810
Permit Writer:
Teresa Rodriguez
30 2 cfs :
309
Date:
1/19/2017
IWC (%):
14.7
1
1 :j
I. SUMMARY
The Eagle Road WWTP is owned by Gastonia and operated by Two Rivers Utilities. The facility treats
domestic wastewaters from the Towns of Cramerton, Kings Grant, and Belmont. Gastonia submitted an
application for renewal on April 29, 2014. The permit expired on January 31, 2015.
The facility was originally permitted to JPS Auto Products, a textile facility. The Town of Cramerton
purchased the facility in 1999. In 2011 the Town of Cramerton and the City of Gastonia merged their
utilities systems. Gastonia utilities are operated through Two Rivers Utilities. The 4.0 MGD treatment
system consists of: mechanical screens, aeration basin, clarifiers, chlorine contact basin, dechlorination,
aerobic digester, and post aeration.
There are no industrial users discharging to this facility, therefore it doesn't have a pre-treatment
program.
Gastonia requested the following permit modifications:
1. Limits for Total Nitrogen and Total Phosphorus for both the Long Creek (NC0020184) and
Eagle Road (NC0006033) facilities be expressed as a bubble limits in pounds per day.
2. Reduction in monitoring frequency for BOD, TSS, ammonia and fecal coliform.
3. Reduce instream monitoring from monthly to year around.
4. Eliminate monitoring for conductivity.
Fact Sheet
NPDES NCO030210 Pennit Renewal
Page 1

11. RECEIVING STREAM
A. Stream Classification
This facility discharges to the South Fork Catawba River in the Catawba River Basin, classified WS-V
waters, HUC 0305010206. This section of the South Fork Catawba River is not impaired in the draft NC
2016 303(d) list.
B. Lake Wyle TMDL/Nutrient Limits
Backgound
Due to eutrophic conditions and chlorophyll -a water quality violations a TMDL and Nutrient
Management Strategy was developed in 1995 for the North Carolina portion of Lake Wylie and its
tributaries. The Nutrient Management Strategy was approved by the EPA in 1998. The strategy set
individual allocations for existing WWTPs and new/expanding discharges. The Division incorporated
TN and TP limits are expressed as average concentrations. TN are summer limits (April -October); those
for TP apply year-round. The Eagle Road facility is subject to the Lake Wylie Nutrient Management
Strategy and included permit limits of 6 mg/l (summer only) for Total Nitrogen (TP) and 1 mg/1 for Total
Phosphorus (TP) in the permits since January 1, 2000.
With this permit renewal Gastonia is requesting to combine the allocations from both the Long Creek
WWTP and Eagle Road WWTP into a combined bubble allocation. In order to transfer nutrient
allocations, nutrient limits for the facilities must be expressed as mass loads rather than concentrations.
Therefore, the Division must adopt a standard way of expressing TN and TP limits that both enables
nutrient transfers and ensures that any transfers remain consistent with the approved TMDL.
Annual mass limits will enable the transfer of allocations among dischargers and are consistent with the
phosphorus allocations set in the TMDL. However, annual limits for nitrogen do not, by themselves,
ensure that summer -season loads satisfy the TMDL: a facility could exceed its allowable summer load
and still meet the annual limit by improving plant performance for the rest of the year. An additional limit
(or other control) is necessary to protect water quality during the summer season.
Proposed TMDL Implementation
The Division proposes to implement the Lake Wylie TMDL using the following approach:
• The distribution of nutrient allocations — and any transfer of allocations — must be consistent with
the approved Lake Wylie TMDL.
a. The point source allocations assigned in the TMDL to the lake and its tributaries are valid
only in the original study area and cannot be transferred outside that area except through
modification of the TMDL and the approval of EPA Region 4.
b. Similarly, the tributary allocations identified in the TMDL are only valid within the
assigned subwatersheds and cannot be transferred elsewhere without EPA approval.
• Within each subwatershed, transfers and other changes in allocations cannot result in exceedance
of the tributary allocations in the TMDL. If additional industrial facilities request allocations
based on BAT determinations (none are foreseen at this time), the Division will consider the
request with Region 4.
• Only those allocations that were identified in the TMDL (WWTPs) or authorized (industries with
BAT determinations) are valid. Facilities within the Lake Wylie study area cannot receive credit
for connecting other WWTPs located outside the study area.
• No transfer of allocation will be approved or implemented until the Division is satisfied that the
transfer will not result in localized impacts ("hot spots").
• TN limits will be implemented as follows:
Fact Sheet
NPDES NC0030210 Pen -nit Renewal
Page 2

a. Set summer mass TN limits for all affected dischargers based on the summer daily loads
in the TMDL;
b. Set winter limit based on 12 mg/I or other approved BAT determinations;
c. Add summer -only mass TN limits for affected industries based on the same daily loads as
their annual limits.
TP limits will be implemented as annual mass limit based on daily loads specified on the TMDL
or approved BAT determination.
Proposed Limits
The Eagle Road facility was originally permitted as a textile facility, Cramerton Automotive Products,
owned by JPS, subsequently it was purchased by the Town of Cramerton and permitted for domestic
wastewater. Now the facility is owned and operated by Gastonia and renamed Eagle Road WWTP. The
proposed limits for the Eagle Road permit will follow the strategy outlined above. Since both the Eagle
Road WWTP and Long Creek WWTP (NC0020184) had allocations in the TMDL and discharge within
the same subwatershed, allocations will be combined.
Table 1. TN Proposed Limits
Total Nitro en
Facility
Q
MGD
Summer
mg/1
Summer
lb/d
Summer
lb/season
Winter
mg/l
Winter
lb/d
Winter
Lb/season
Long Creek
16.0
6.0
801
171,337
12.0
1,601
241,793
Eagle Road
4.0
6.0
200
42,834
12.0
400
60,448
Combined
Allocation
2149,171
3029242
Table 2. TP Proposed Limits
Total Phosphorus
Facility
Q
MGD
Annual
mg/l
Annual
lb/d
Annual
lb/yr
Long Creek
16.0
1.0
133
48,706
Eagle Road
4.0
1.0
33
12,176
Combined Allocation
60 882
C. South Fork Catawba RiveAake Wylie Monitoring Data Analysis
South Fork Catawba River Arm:
The Division maintains two ambient monitoring stations in the South Fork Catawba River. One station is
at SR 7 near McAdenville downstream of the Long Creek WWTP (upstream of Eagle Road WWTP) and
the other station is downstream of the Eagle Road WWTP at SR 273. (See attached map)
Table 3. Ambient Monitoring Stations South Fork Catawba River (SFCR)
Station ID
Location
Parameters Monitored
Collection Dates
C650000
SFCR at SR 7 near
Ammonia, Nitrate & Nitrite,
1997 through 2013
McAdenville
TKN, TP
C700000
SFCR at SR 273
Ammonia, Nitrate & Nitrite,
1997 through 2001
(Armstrong Rd)
TKN, TP
CTB 174
SFCR at SR 273
Ammonia, Nitrate & Nitrite,
2001, 2002, 2007 and
(Armstrong Rd)
I TKN, TP, chlorophyll a
12012
Fact Sheet
NPDES NC0030210 Pennit Renewal
Page 3

Table 4. Ambient Monitoring Stations Data Summary
Parameter
C650000
C700000 &
CTB 174
Ammonia
Average
0.07
0.06
Maximum
0.56
0.4
Min
< 0.02
< 0.01
Nitrate & Nitrite
(mg/1)
Average
0.8
0.13
Maximum
1.9
0.36
Min
0.26
0.01
TKN
(mg/1)
Average
0.44
0.36
Maximum
1.6
0.54
Min
< 0.2
0.2
TP
(mg/1)
Average
0.14
0.05
Maximum
0.68
0.08
Min
0.04
0.02
Chlorophyll a
(µg/1)
Average
No data
18
Maximum
No data
32
Min
No data
11
Trends at the downstream station indicate an upward trend for chlorophyll -a, although it is consistently
below 40 µg/l. Total phosphorus and Nitrate & Nitrite levels show a downward trend while TKN shows
and upward trend.
Lake Wylie:
There are four stations in Lake Wylie near Lakewood, near the Wylie Dam.
Table 5. Lake Wylie near Lakewood
Station M
Agency
Collection Dates
Parameters Monitored
198D
DWQ
2001, 2002, 2007 and
Ammonia, Nitrate & Nitrite, TKN, TP,
2012
chlorophyll a
RL 03339
DHEC
2003
Ammonia, Nitrate & Nitrite, TKN, TP,
chlorophyll a
CW-201
DHEC
1999-2014
Ammonia, Nitrate & Nitrite, TKN, TP,
chlorophyll a
Ammonia, Nitrate & Nitrite, TKN, TP,
RL 06433
DHEC
2006
chlorophyll a
Fact Shect
NPDES NCO030210 Permit Renewal
Page 4

Table 6. Ambient Monitorine Stations Data Summary
Parameter
Combined
Ammonia
(mg/1)
Average
0.17
Maximum
0.8
Min
<0.1
Nitrate & Nitrite
(mg/1)
Average
0.19
Maximum
0.37
Min
< 0.1
TKN
(mg/1)
Average
0.41
Maximum
1.6
Min
< 0.1
TP
(mg/1)
Average
0.04
Maximum
0.23
Min
< 0.02
Chlorophyll a
Average
11
Maximum
19
Min
2.5
Chlorophyll -a shows very similar trend to the station in the South Fork Catawba River, with a slight
upward trend and no values over 40 µg/1.
20.0
18.0
16.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
Lakewood Stations
Chlorophyll a (ug/1)
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 .~-� eN-1 .N+ ."i
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
\ N \ \
V O vt MO O Ol CO O n N V' W O1 In lO N rtl O n O Y1
If \ \ \ \ \ \ \ \ \
Ill. DATA/CompuANCEREymw
A. DMR Review
DMR were reviewed for the period of January 2011 to January 2016. Data are summarized in Table 7.
The facility received two NOVs, one for a BOD weekly average exceedance in January 2011 and one for
daily average exceedance of total phosphorus in March 2012.
Data for TSS, BOD, ammonia and fecal coliform were evaluated according to the Division's Monitoring
Frequency Reduction Guidance. All parameters meet the conditions to receive reduction in monitoring
frequency.
Pact Sheet
NPUPS NC0030210 Pennit Renewal
Page 5

Table 7. Data Summary
Parameter
Units
Average
Max
Min
Flow
MGD
0.623
2.442
0.030
BODS
mg/1
3.7
28.3
<2
NH3N
m
0.2
5.2
< 0.2
TSS
m
2.9
56
<2.5
H
SU
7.1
7.9
6
DO
111911
10
14.4
7.2
Temperature
°C
17.2
31
2.4
TRC
1
19.7
42
< 20
TN
m 1
23.5
253
7
TP
mg/1
0.63
1.7
0.1
Fecal Coliform
#/100 ml
3
4100
<1
Conductivity
umhos/cm
446
1422
295
B. Mercury Evaluation
A mercury evaluation was conducted in accordance with the permitting guidance developed for the
implementation of the statewide Mercury TMDL to determine the need for a limit and Mercury
Minimization Plan (MMP). Mercury was only monitored on the priority pollutant scans so there is only
five data points. Based on dilution the water quality based effluent limitation (WQBEL) for mercury is
253 ng/I. The technology based effluent limit (TBEL) is 47 ng/1. None of the annual averages exceeds the
WQBEL or TBEL. The facility had detections above I ng/l over the past five years, therefore a Mercury
Minimization Plan will be required in the permit. A condition will be added to the permit describing the
requirements for the MMP.
Table 8. Mercury Evaluation
2011
2012
2013
2014
2015
Mercury Annual Max (n 1)
1.42
< I
< 1
< 1
1.7
Number of samples
1
1
1
1
1
WQBEL
253 n
TBEL
47 n
C. RPA:
The need for toxicant limits is based upon a demonstration of reasonable potential to exceed water quality
standards, a statistical evaluation that is conducted during every permit renewal utilizing the most recent
effluent data for each outfall. The RPA is conducted in accordance with 40 CFR 122.44 (d) (i). The NC
RPA procedure utilizes the following: 1) 95% Confidence Level/95% Probability; 2) assumption of zero
background; 3) use of %2 detection limit for "less than" values; and 4) streamflows used for dilution
consideration based on 15A NCAC 2B.0206. Effective April 6, 2016, NC began implementation of
dissolved metals criteria in the RPA process in accordance with guidance titled NPDES Implementation of
Instream Dissolved Metals Standards, dated June 10, 2016.
A reasonable potential analysis was conducted on effluent toxicant data collected between January 2011
and December 2016. Based on this analysis, the following permitting actions are proposed for this
permit:
• No Limit or Monitoring: The following parameters will not receive a limit or monitoring, since
they did not demonstrate reasonable potential to exceed applicable water quality standards/criteria
and the maximum predicted concentration was <50% of the allowable concentration: total
phenolic compounds, nickel, chromium and zinc.
A spreadsheet of the RPA results is attached to this Fact Sheet.
Fact Sheet
Nil DES NC0030210 Pennit Renewal
Page 6

D. Priority Pollutant Analysis:
The application includes the results of three priority pollutant analyses. No priority pollutants were
detected except for chloroform and dichlorobromomethane. Since both parameters were detected at
values below the allowable concentrations, no limits are proposed.
E. AcLuatic Toxicity Testing:
Permit requires chronic toxicity, ceriodaphnia dubia, 4.7%. The facility passed 20 out of 20 toxicity tests.
The application included four second species toxicity tests with passing results.
F. Instream Monitoring:
The permit requires instream monitoring for temperature and dissolved oxygen at one upstream location
and one downstream location. Reported data shows that water quality standards are not exceeded in the
stream.
IV. LIMITS AND MONITORING REQUIREMENTS:
Current conditions, as well as the basis for the limits are summarized in Table 9.
Table 9. Current Conditions and Proposed Chances
Probed changes
-71
c Bas><s� 4101,60
:_ L_ima1i>�%oclii_o_ �n A
R
Flow
4 MGD
No changes
15A NCAC 2B .0505
BOD5
10 mg/l MA
Monitoring was
Based on modeling results for protection of DO
15 mg/l WA
reduced from daily
standard.
to 3/week
Monitoring reduction as per Division's Guidance
for Monitoring Frequency Reduction.
NH3 N
4 mg/l MA
Monitoring was
Based on modeling results for protection of DO
12 mg/l WA
reduced from daily
standard
to 3/week
Monitoring reduction as per Division's Guidance
for Monitoring Frequency Reduction.
TSS
30 mg/l MA
Monitoring was
Secondary treatment standards/40 CFR 133 /
45 mg/l WA
reduced from daily
15A NCAC 2B .0406
to 3/week
Monitoring reduction as per Division's Guidance
for Monitoring Frequency Reduction.
Fecal coliform
200/100 ml MA
Monitoring was
State WQ standards, 15A NCAC 2B .0200
400/100 ml WA
reduced from daily
Monitoring reduction as per Division's Guidance
to 3/week
for Monitoring Frequency Reduction.
DO
Monitor
No changes
State WQ standards, 15A NCAC 2B .0200
H
6 to 9 SU
No changes
State WQ standards, 15A NCAC 2B .0200
Total residual
28 µg/l DM
No changes
State WQ standards, 15A NCAC 2B .0200
chlorine
Conductivity
Monitor
Eliminate
The facility does not receive industrial
monitoring
wastewater.
Hardness
No requirements
Effluent and
To collect data for the calculation of hardness
upstream
dependent dissolved metal standards and for
monitoring
reasonable potential analysis.
Total Nitrogen
6 mg/1
Summer: 214,171
Lake Wylie TMDL permitting strategy. "Bubble
lb/season
Limits" for Long Creek and Eagle Road.
Winter: 302,242
lb/season
Total
1.0 mg/l
60,882 lb/yr
Lake Wylie TMDL permitting strategy. "Bubble
Phosphorus
Limits" for Long Creek and Eagle Road.
Phenols
51 µg/l MA
Eliminate limits
No reasonable potential to exceed the water
51 1 WA
and monitodng
I qualitystandard.
Fact Sheet
NPDES NCO030210 Pennit Renewal
Page 7

V. SUMMARY OF PROPOSED CHANGES:
1. To meet new federal regulations for electronic reporting Special Condition A.(9) was added
describing requirements for submittal of electronic DMRs.
2. Special condition with requirements for a MMP was added to the permit.
VI. PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: January 25, 2017
Permit Scheduled to Issue: March 13, 2017
VIL NPDES DIVISION CONTACT
If you have questions regarding any of the above information or on the attached permit, please contact
Teresa Rodriguez at 919-807-6387.
NAME: LDATE: /
Fact Shcct
NPDES NCO030210 Permit Renewal
Pagc 8

Permit No. NC0006033
NPDES Implementation of Instream Dissolved Metals Standards - Freshwater Standards
The NC 2007-2015 Water Quality Standard (WQS) Triennial Review was approved by the NC
Environmental Management Commission (EMC) on November 13, 2014. The US EPA subsequently
approved the WQS revisions on April 6, 2016, with some exceptions. Therefore, metal limits in draft
permits out to public notice after April 6, 2016 must be calculated to protect the new standards - as
approved.
Table 1. NC Dissolved Metals Water Oualitv Standards/Aquatic Life Protection
Parameter
Acute FW, µg/l
(Dissolved)
Chronic FW, µg/1
(Dissolved)
Acute SW, µg/l
(Dissolved)
Chronic SW, µg/1
(Dissolved)
Arsenic
340
150
69
36
Beryllium
65
6.5
---
---
Cadmium
Calculation
Calculation
40
8.8
Chromium III
Calculation
Calculation
---
---
Chromium VI
16
11
1100
50
Copper
Calculation
Calculation
4.8
3.1
Lead
Calculation
Calculation
210
8.1
Nickel
Calculation
Calculation
74
8.2
Silver
Calculation
0.06
1.9
0.1
Zinc
I Calculation
Calculation
90
81
Table 1 Notes:
1. FW= Freshwater, SW= Saltwater
2. Calculation = Hardness dependent standard
3. Only the aquatic life standards listed above are expressed in dissolved form. Aquatic life
standards for Mercury and selenium are still expressed as Total Recoverable Metals due to
bioaccumulative concerns (as are all human health standards for all metals). It is still necessary
to evaluate total recoverable aquatic life and human health standards listed in 15A NCAC
2B.0200 (e.g., arsenic at 10 µg/l for human health protection; cyanide at 5 µg/L and fluoride at
1.8 mg/L for aquatic life protection).
Table 2. Dissolved Freshwater Standards for Hardness -Dependent Metals
The Water Effects Ratio (WER) is equal to one unless determined otherwise under 15A
NCAC 02B .0211 Subparagraph (11)(d)
Metal
NC Dissolved Standard, µg/I
Cadmium, Acute
WER*(1.136672-[In hardness](0.041838)) • e^10.9151 [In hardness]-3.1485)
Cadmium, Acute Trout waters
WER* (1.136672-[In hardness](0.041838)) • e^ (0.9151 [In hardness]-3.6236)
Cadmium, Chronic
WER* f 1.101672-[In hardness](0.041838)) • e^(0.7998[In hardness]-4.4451)
Chromium III, Acute
WER*0.316 • e^(0.8190[In hardness]+3.7256)
Chromium III, Chronic
WER*0.860 - e^(0.8190[In hardness]+0.6848)
Copper, Acute
WER*0.960 • e^(0.9422[In hardness]-1.700)
Copper, Chronic
WER*0.960 - e^(0.8545[ln hardness]-1.702)
Lead, Acute
WER*(1.46203-[ln hardness](0.145712)) • e^(1.273[ln hardness]-1.460)
Lead, Chronic
WER* (1.46203-[In hardness](0.145712)) - e^(1.273[In hardness]-4.705)
Nickel, Acute
WER*0.998 - e^(0.8460[ln hardness]+2.255)
Nickel, Chronic
WER*0.997 - eA(0.8460[In hardness]+0.0584)
Page -1 of 4

Permit No. NC0006033
Silver, Acute
WER*0.85 - e^(1.72[ln hardness]-6.59)
Silver, Chronic
Not applicable
Zinc, Acute
WER*0.978 - e^{0.8473[In hardness]+0.884)
Zinc, Chronic
WER*0.986 - e^(0.8473[ln hardness]+0.884)
General Information on the Reasonable Potential Analysis (RPA)
The RPA process itself did not change as the result of the new metals standards. However, application of
the dissolved and hardness -dependent standards requires additional consideration in order to establish the
numeric standard for each metal of concern of each individual discharge.
The hardness -based standards require some knowledge of the effluent and instream (upstream) hardness
and so must be calculated case -by -case for each discharge.
Metals limits must be expressed as `total recoverable' metals in accordance with 40 CFR 122.45(c). The
discharge -specific standards must be converted to the equivalent total values for use in the RPA
calculations. We will generally rely on default translator values developed for each metal (more on that
below), but it is also possible to consider case -specific translators developed in accordance with
established methodology.
RPA Permitting Guidance/WQBELs for Hardness -Dependent Metals - Freshwater
The RPA is designed to predict the maximum likely effluent concentrations for each metal of concern,
based on recent effluent data, and calculate the allowable effluent concentrations, based on applicable
standards and the critical low -flow values for the receiving stream.
If the maximum predicted value is greater than the maximum allowed value (chronic or acute), the
discharge has reasonable potential to exceed the standard, which warrants a permit limit in most cases. If
monitoring for a particular pollutant indicates that the pollutant is not present (i.e. consistently below
detection level), then the Division may remove the monitoring requirement in the reissued permit.
1. To perform a RPA on the Freshwater hardness -dependent metals the Permit Writer compiles the
following information:
• Critical low flow of the receiving stream, 7Q 10 (the spreadsheet automatically calculates
the 1 Q 10 using the formula 1 Q 10 = 0.843 (s7Q 10, cfs) 0`1
• Effluent hardness and upstream hardness, site -specific data is preferred
• Permitted flow
• Receiving stream classification
2. In order to establish the numeric standard for each hardness -dependent metal of concern and for
each individual discharge, the Permit Writer must first determine what effluent and instream
(upstream) hardness values to use in the equations.
The permit writer reviews DMR's, Effluent Pollutant Scans, and Toxicity Test results for any
hardness data and contacts the Permittee to see if any additional data is available for instream
hardness values, upstream of the discharge.
If no hardness data is available, the permit writer may choose to do an initial evaluation using a
default hardness of 25 mg/L (CaCO3 or (Ca + Mg)). Minimum and maximum limits on the
hardness value used for water quality calculations are 25 mg/L and 400 mg/L, respectively.
If the use of a default hardness value results in a hardness -dependent metal showing reasonable
potential, the permit writer contacts the Permittee and requests 5 site -specific effluent and
upstream hardness samples over a period of one week. The RPA is rerun using the new data.
Page 2 of 4

Permit No. NC0006033
The overall hardness value used in the water quality calculations is calculated as follows:
Combined Hardness (chronic)
_ (Permitted Flow, cfs *Avg. Effluent Hardness, m ) + (s7010. cfs *Avg. Upstream Hardness, mg/L)
(Permitted Flow, cfs + s7Q 10, cfs)
The Combined Hardness for acute is the same but the calculation uses the 1 Q 10 flow.
3. The permit writer converts the numeric standard for each metal of concern to a total recoverable
metal, using the EPA Default Partition Coefficients (DPCs) or site -specific translators, if any
have been developed using federally approved methodology.
EPA default partition coefficients or the "Fraction Dissolved" converts the value for
dissolved metal at laboratory conditions to total recoverable metal at in -stream
ambient conditions. This factor is calculated using the linear partition coefficients
found in The Metals Translator. Guidance for Calculating a Total Recoverable
Permit Limit from a Dissolved Criterion (EPA 823-B-96-007, June 1996) and the
equation:
Cdiss - 1
Ctotal 1 + ( [Kpo] [sS(1+e)] [10-6] }
Where:
ss = in -stream suspended solids concentration [mg/1], minimum of 10 mg/L used,
and
Kpo and a = constants that express the equilibrium relationship between dissolved
and adsorbed forms of metals. A list of constants used for each hardness -dependent
metal can also be found in the RPA program under a sheet labeled DPCs.
4. The numeric standard for each metal of concern is divided by the default partition coefficient (or
site -specific translator) to obtain a Total Recoverable Metal at ambient conditions.
In some cases, where an EPA default partition coefficient translator does not exist (ie. silver), the
dissolved numeric standard for each metal of concern is divided by the EPA conversion factor to
obtain a Total Recoverable Metal at ambient conditions. This method presumes that the metal is
dissolved to the same extent as it was during EPA's criteria development for metals. For more
information on conversion factors see the June, 1996 EPA Translator Guidance Document.
5. The RPA spreadsheet uses a mass balance equation to determine the total allowable concentration
(permit limits) for each pollutant using the following equation:
Ca = (s7Q 10 + Ow) (Cwgs) — (s7 10) (Cb)
Qw
Where: Ca = allowable effluent concentration (µg/L or mg/L)
Cwgs = NC Water Quality Standard or federal criteria (µg/L or mg/L)
Cb = background concentration: assume zero for all toxicants except NH3* (µg/L or mg/L)
Qw = permitted effluent flow (cfs, match s7Q 10)
s7Q 10 = summer low flow used to protect aquatic life from chronic toxicity and human
health through the consumption of water, fish, and shellfish from noncarcinogens (cfs)
* Discussions are on -going with EPA on how best to address background concentrations
Flows other than s7Q 10 may be incorporated as applicable:
1 Q 10 = used in the equation to protect aquatic life from acute toxicity
Page 3 of 4

Permit No. NC0006033
QA = used in the equation to protect human health through the consumption of water,
fish, and shellfish from carcinogens
30Q2 = used in the equation to protect aesthetic quality
6. The permit writer enters the most recent 2-3 years of effluent data for each pollutant of concern.
Data entered must have been taken within four and one-half years prior to the date of the permit
application (40 CFR 122.21). The RPA spreadsheet estimates the 95th percentile upper
concentration of each pollutant. The Predicted Max concentrations are compared to the Total
allowable concentrations to determine if a permit limit is necessary. If the predicted max exceeds
the acute or chronic Total allowable concentrations, the discharge is considered to show
reasonable potential to violate the water quality standard, and a permit limit (Total allowable
concentration) is included in the permit in accordance with the U.S. EPA Technical Support
Document for Water Quality -Based Toxics Control published in 1991.
7. When appropriate, permit writers develop facility specific compliance schedules in accordance
with the EPA Headquarters Memo dated May 10, 2007 from James Hanlon to Alexis Strauss on
40 CFR 122.47 Compliance Schedule Requirements.
8. The Total Chromium NC WQS was removed and replaced with trivalent chromium and
hexavalent chromium Water Quality Standards. As a cost savings measure, total chromium data
results may be used as a conservative surrogate in cases where there are no analytical results
based on chromium III or VI. In these cases, the projected maximum concentration (95th %) for
total chromium will be compared against water quality standards for chromium III and
chromium VI.
9. Effluent hardness sampling and instream hardness sampling, upstream of the discharge, are
inserted into all permits with facilities monitoring for hardness -dependent metals to ensure the
accuracy of the permit limits and to build a more robust hardness dataset.
10. Hardness and flow values used in the Reasonable Potential Analysis for this permit included:
Parameter
Value
Comments (Data Source)
Average Effluent Hardness (mg/L)
[Total as, CaCO3 or (Ca+Mg)]
59
PPA
Average Upstream Hardness (mg/L)
[Total as, CaCO3 or (Ca+Mg)]
25
Default
7Q 10 summer (cfs)
125
1 Q 10 (cfs)
5.7
Permitted Flow (MGD)
14
Date: /
Permit Writer: 01'r L
Page 4 of 4

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY CHECK WQS NEED ADDITIONAL DATA INPUTS
Table 1. Project Information
❑CHECK IF HOW OR ORW WQS
Facility Name
Gastonia Eagle Creek
4
W WTP/WTP Class
NPDES Permit
NC0006033
Outfall
001
Flow, Qw (MGD)
4.000
Receiving Stream
Catawba River
HUC Number
Stream Class
WS
125.00
❑+ Apply WS Hardness WQC
7010s (cfs)
7010w (cfs)
230.00
30Q2 (cfs)
810.00
CIA (cfs)
810.00
1 Q1Its (cfs)-.
_,..IFP401.87
Effluent Hardness (Median)
59 mg/L
Upstream Hardness
default 25 mg/L (Hard Aveage = 25 mg/L)
Combined Hardness Chronic
26.61 pill
-----------------------------------
Combined Hardness Acute
26.95 mg/L
Data Source(s)
❑CHECK TO APPLY MODEL
Perot
Par02
Par03
Par04
Penns
Par06■
Par07
Pero$
Par09
Par10
Part
Par12
Par13
Par14
Parts
Parts
Par17
Parts
Par19
Par20
Par21
Par22
Par23
Par24
Table 2. Parameters of Concern
Name WQS Typo Chronic Modifier Acute PQL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
HHIWS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Trout
NC
0.6183
TR
2.1511
ug/L
Chlorides
Water Supply
NC
250
WS
mg/L
Chlorinated Phenolic Compounds
Water Supply
NC
1
A
ug/L
Total Phenolic Compounds
Aquatic Life
I NCI
300
A
I
ug/L
Chromium III
Aquatic Life
NC
123.8943
FW
962.5213
ug/L
Chromium VI
Aquatic Life
INC
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
8.3114
FW
11.2401
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Life
NC
1,800
FW
ug/L
Lead
Aquatic Life
NC
3.1553
FW
82.1474
ug/L
Mercury
Aquatic Life
INC
12
FW
0.5
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
39.2459
FW
357.2060
pg/L
Nickel
Water Supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
ug/L
Silver
Aquatic Life
INC
0.06
FW
0.3373
ug/L
Zinc
Aquatic Life
NC
133.6016
FW
133.9674
ug/L
chloroform
Water Supply
C
5.6
WS
dichlorobromomethane
Water Supply
C
0.55
WS
phenol
Aquatic Life
NC
300
FW
6033 RPA phenol.xlsm, input
1/19/2017

Gastonia Eagle Creek
NC0006033 Freshwater RPA- 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
Qw (MOD) = 4.00
IQIOS(cfs)= 101.87
7QIOS (CIS) = 125.00
7QIOW (cfs)= 230.00
3011(CIS)= 810.00
Avg. Stream Flow, QA (cfs) = 810.00
Receiving Stream: NO HUC NUMBER
W WTP/WTP Class: 4
IWC% @ IQIOS = 5.7370223
IWC% @7QIOS= 4.725609756
RVC%@ 7QIOW = 2.624894157
IWe%@30Q2= 0.759617741
fW%C@QA= 0.759617741
Stream elm: WS
Outfal 1001
Qw=4MGQ
COMBINED HARDNESS (mg(L)
Acute = 26.95 mg/L
Chromic = 26.61 mg/L
YOU HAVE DESIGNATED THIS RECEIVING
STREAM AS WATER SUPPLY
Effluent Hard:O val > 100 m91L 0 val < 25 mg/L
Effluent Ham Mad = 59 mg/L
PARAMETER
STANDARDS B CRITERIA(2)
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
J
F
(1)
NC WQS I Applied '/x FAV /
a
z
n
n 9 Del. Max Pred Cw Allowable Cw
Chronic Standard Acute
Acute: NO WQS
No RP
Total Phenolic Compounds
NC
300 A(30Q2)
ug/L
38 11 23.8 _
_ _ _ _ _
Chronic. 39,493.5
No value > Allowable Cw
Acute: 16,777.4
Chromium 111
NC
123.8943 FW(7QIOs) 962.5213
µg/L
0 0
N/A
_
_______________________
- -_
Chronic: 2,62L8
Acute: 278.9
Chromium VI
NC
II FW(7QIOs) 16
µg/L
0 0
N/A
_ _
_ _ -
- _ ____
Chronic: 232.8
Chromium, Total
NC
µg/L
3 2 3.0
No RP
Note: n < 9 Default C.V.
Limited data set
Acute: 195.92
No RP
Copper
NC
8.3114 FW(7QIOs) 11.2401
ug/L
3 3 12.00
_ _
_
Note: a <_ 9 Default C.V.
Chronic: 175.88
Limited data set
No value> Allowable Cw
Acute (FW): 6,226.3
No RP
Nickel
NC
39.2459 FW(7QIOs) 357.2060
µg/L
3 3
10.2
-----------------------------
Chronic (FW)t 830.5
Note
Default C.V.
N_o value> Allowable C_w_
_____________
Nickel
NC
25.0000 WS(7Q10s)
µg/L
Limited data set
Chronic (WS): 529.0
____________
No value> Allowable Cw
Acute: 2,335.1
No RP
Zinc
NC
133.6016 FW(7QIOs) 133.9674
ug/L
3 3 153.6
____________________
Nate n-9 Default C.V.
_
Chronic: 2,827.2
I.imited data set
No value> Allowable Cw
Acute: NO WQS
chloroform
C
5.6 WS(Qavg)
pg/L
0 0
N/A
_
_ ___ _ _ ___
Chronic:----737.21290
Acute: NO WQS
dichlorobromomethane
TC
0.55 WS(Qavg)
pg'L
0 0
N/A
_ _ _
--72.40484
_ _ _ ___________ ____
- --
_ _
Ch_ronic
6033 RPA phenol.xism, rpa
Page 1 of 1 1/19/2017

Effluent Hardness (monthly average
Date Data DDL=112DL Results
1 59 59 Std Dev.
2 Mean
3 C.V.
4 n
5 10th Per value
6 Median Value :
7 Max. Value
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
REASONABLE POTENTIAL ANALYSIS
Uae •PSTE ASPECIAL Use "PASSPECI
values "on^copy H2 TE
Upstream Hardness Values"Men"COF
. Mazlmum data . Maximum tlata
points = 58 points = 58
59.0000
0.0000
1
59.00 mg/L
59.00 mg/L
59.00 mg/L
Date Data aDL=112DL Results I
1 25 25 Std Dev. N/A
2 Mean
25.0000
3 C.V.
0.0000
4 n
1
5 10th Per value
25.00 mg/L
6 Average Value
25.00 mg/L
7 Max. Value
25.00 mg/L
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
_1_
6033 RPA phenol.xlsm, data
1/19/2017

Total Phenolic Compounds
Date Data
BDL=1/2DL
Results
1
<
5
2.5
Std Dev.
2
<
5
2.5
Mean
3
<
5
2.5
C.V.
4
6
6
n
5
<
5
2.5
6
<
5
2.5
Mull Factor =
7
<
5
2.5
Max. Value
8
6
6
Max. Prod Cw
9
<
5
2.5
10
<
5
2.5
11
<
5
2.5
12
<
5
2.5
13
<
5
2.5
14
<
5
2.5
15
<
5
2.5
16
<
5
2.5
17
6
6
18
<
5
2.5
19
<
5
2.5
20
5.8
5.8
21
8.8
8.8
22
<
5
2.5
23
<
5
2.5
24
<
5
2.5
25
<
5
2.5
26
18
18
27
20
20
28
<
5
2.5
29
12
12
30
<
5
2.5
31
<
5
2.5
32
<
5
2.5
33
<
5
2.5
34
7.6
7.6
35
<
5
2.5
36
20
20
37
<
5
2.5
38
9.1
9.1
REASONABLE POTENTIAL ANALYSIS
U.'PASTE SPECK
Value s-then'COP
. Maximum data
points = N
4.9158
0.9910
38
1.19
20.0 ug/L
23.8 ug/L
Par10
Chromium, Total
Date
Data BDL=1/2DL Results
1
c 1 0.5 Std Dev.
2
1 1 Mean
3
1 1 C.V.(default)
4
n
5
6
Mult Factor =
7
Max. Value
8
Max. Pred Cw
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
Use 'PASTE SPE
Values"then -C
. Maximum ds
points = 58
0.8333
0.6000
3
3.00
1.0 pg/L
3.0 pg/L
Pall
Copper
Date Data BDL=I2DL
4 4
2.8 2.8
1 1
_2_
6033 RPA phenol.xlsm, data
1/19/2017

J. "PASTE SPEC[
Value$" then'COF
. Maximum data
polnl$ = 50
Results I
Sld Dev.
1.5100
Mean
2.6000
C.V.(default)
0.6000
n
3
Mull Factor =
3.00
Max. Value
4.00 ug1L
Max. Pred Cw
12.00 ug/L
REASONABLE POTENTIAL ANALYSIS
& Par18
Oae'PASTE SPECIAL
Nickel
valuea"man-copr
. Maximum data
imbrue a 58
Date Data
BDL=112DL
Results
-_
2.2
2.2
Std Dev.
0.9165
1.6
1.6
Mean
2.4000
3.4
3.4
C.V.(default)
0.6000
n
3
Mult Factor =
3.00
Max. Value
3.4 pg/L
Max. Pred Cw
10.2 pg/L
Zinc
Date Data BDL=112DL
Results
1
51.2 51.2
Sld Dev.
2
35.4 35.4
Mean
3
47.3 47.3
C.V.(default)
4
n
5
6
Mult Factor =
7
Max. Value
8
Max. Fred Cw
J.'PA51'E SPECI
Values" then'COF
. Maximum data
point$ = 58
44.6333
0.6000
3
3.00
51.2 ug/L
153.6 ug/L
-3-
6033 RPA phenolAsm, data
1/19/2017

Eq
TWO vE RS
UTlLIT1ES 9 �
^ We are TRU to our customers!
July 31, 2014 DECEIVED/DENR/C
^ AUG - 4 Zi11"
^ Division of Water Resources g amy
Permitting Section
.� WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
^ Re: Renewal Application of NPDES Permits
0% Long Creek Wastewater Treatment Plant (NPDES #NC0020184)
.q Eagle Road Wastewater Treatment Plant (NPDES #NC0006033)
^
Dear Sir or Madam:
a►
Please find attached, the renewal applications for Two Rivers Utilities National Pollutant Discharge
�► Elimination System (NPDES) Permits #NC0020184 and #NC0006033 for the Long Creek and Eagle
Road Wastewater Treatment Plants. These permit renewal applications with attachments are
being submitted by the August 4, 2014 deadline to comply with the requirement to apply 180 days
prior to the date of permit expiration (January 31, 2015). As requested, please find for each plant,
^ the original signed version of this information along with two copies. Copies of this cover letter are
included inside each packet.
.\
„k The Long Creek Wastewater Treatment Plant continues to operate as an advanced biological
nutrient removal plant treating municipal wastewater for the City of Gastonia and surrounding
^ area. The Eagle Road Wastewater Plant continues to operate as an extended aeration plant with
chemical phosphorus removal treating wastewater for the Town of Cramerton and surrounding
area. Since the last permit renewal request, numerous maintenance items and minor upgrades
.., have taken place throughout these facilities. Authorizations to construct have been obtained
^ where appropriate. Examples of these upgrades are shown below and more information can be
provided if desired:
^ • Upgraded dissolved air system and controls on two aeration basin trains at the Long Creek
^ W WTP.
^ • Installed an online nitrogen probe on the chlorine contact basin effluent at the Long Creek
WWTP.

^ • Repurposed an out of service polishing pond as an emergency storage basin at the Long
Creek WWTP.
• Currently rehabilitating the dissolved air floatation pump station and replacing the pumps
at the Long Creek WWTP.
^ • Installed a de -watering pump for the aerobic digester along with piping and valves at
the Eagle Road WWTP
^ • Installed a flushing system to clean the sodium hypochlorite and sodium bisulfite
.v chemical feed lines going into the chlorine contact and dechlorination basins at the
Eagle Road WWTP.
^ All analyses have been tested by North Carolina certified laboratories in accordance with 40 CFR
Part 136 requirements. Efforts have been made to obtain seasonal variation in the sampling as
^ much as was possible. This application includes all data gathered for the last three years (July 1,
..� 2011 through June 30, 2014).
^
With this permit renewal, we respectfully request the following changes to our permits:
^
Long Creek WWTP (NPDES #NC0020184) and Eagle Road WWTP (NPDES #NC0006033)
• As discussed with Mr. Mike Templeton, Mr. Tom Belnick and Ms. Kathy Stecker, and as
.�
outlined in a 6/23/14 letter to Mr. Templeton; we request that limits for Total Nitrogen
and Total Phosphorus for these two facilities be expressed as a single Ibs/day aggregate
or bub a limit. We also request that credit be applied to this Ibs/day limit for the other
facilities which have been or will soon be decommissioned and whose flow is being
^
treated by one of these two facilities. A copy of this letter with details of this request is
.
included in the back of these permit renewal packets.
..,
• Data for the last three years has been evaluated and both facilities meet the
requirements for reduction in monitoring frequencies in NPDES Permits for
exceptionally performing facilities as outlined in DENR's October 22, 2012 policy
^
statement. In accordance with this policy we are requesting that the minimum required
monitoring frequency for BODs, TSS, NH3-N and fecal coliform be reduced to 2x a week
..
for both the Long Creek and Eagle Road WWTPs. A copy of the data used for this
evaluation is attached in the back of these permit renewal packets.
• Upstream and downstream monitoring has not shown a noticeable impact from the
^
treatment plant discharges, but can be burdensome to perform while maintaining
staffing requirements at the treatment plants — particularly when required three times a
week in the summer. We request that the upstream and downstream monitoring
.k
requirements be reduced to once -per -week year-round.
Long Creek WWTP (NPDES #NC0020184)
• Weekly monitoring for Nickel at the Long Creek WWTP effluent showed an average
..
nickel concentration of 8.8 µg/L and a maximum concentration of 28.2 lug/L. We
request that this monitoring frequency requirement and limit be removed.

Ak
.,
Ilk
^
• Quarterly monitoring of the Long Creek WWTP effluent for ADM[ color showed an
• %
average color reading of 14.9 ADM] Color Units and a maximum color reading of 133.8
„
ADMI Color Units. With the current industrial users discharging to the Long Creek
WWTP, there is very little potential for any significant color to be imparted into the
South Fork Catawba River. We request that this monitoring frequency be removed.
^
Eagle Road WWTP (NPDES #NC00060331
• Daily monitoring for conductivity at the Eagle Road WWTP effluent showed an average
conductivity measurement of 445 umhos and a maximum daily measurement of 1,361
umhos. There are no large industrial sources of conductivity for this facil' We
Am
request that this monitoring frequency requirement be removed.
^
^ Two Rivers Utilities remains very committed to good environmental stewardship and take our
obligation to protect the receiving waters very seriously. We request these changes in the
^ NPDES permits in order to allow us to focus on other environmental issues (such as removing
the problematic discharges from some smaller municipalities) while not overburdening our rate
^ payers. If you would like any additional information or if I can be of any assistance regarding
^ this application or these requests, please feel free to call me at 704-842-5106 or e-mail at
.. [e-mail].
.,
^
Sincerely,
^
David Shellenbarger
Assistant Division Manager - Compliance
^ Wastewater Treatment Division
Two Rivers Utilities
r�
,.� cc: Larry Cummings — Division Manager of Wastewater Treatment, TRU
^ Stephanie Scheringer —Assistant Division Manager of Operations, TRU
Michael Graham — Chief Senior Plant Operator/ORC — Long Creek WWTP, TRU
^ Hubert Hampton —Senior Plant Operator/ORC— Eagle Road WWTP, TRU
^
Ak Certified Mail: 7014 0150 0002 0276 0692
^
^
^

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Eagle Road WWfP, NC0006033
Renewal
Catawba
SUPPLEMENTAL APPLICATION INFORMATION
PART F.INDUSTRIAL USER DISCHARGES AND RCRA/CERCLA WASTES
All treatment works receiving discharges from significant industrial users or which receive RCRA,CERCLA, or other remedial wastes must
complete part F.
GENERAL INFORMATION:
F.I. Pretreatment program. Does the treatment works have, or is subject to, an approved pretreatment program?
❑ Yes ® No
F.2. Number of Significant Industrial Users (SIUs) and Categorical Industrial Users (CIUs). Provide the number of each of the following types of
industrial users that discharge to the treatment works.
a. Number of non -categorical SIUs. NA
b. Number of CIUs. NA
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the Information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: N/A
Mailing Address:
FA. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s):
Raw material(s):
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (gpd) and whether the discharge is continuous or intermittent.
gpd ( continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ❑ Yes ❑ No
b. Categorical pretreatment standards ❑ Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 18 of 21

Aft
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Eagle Road WWTP, NC0006033
Renewal
Catawba
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ❑ No If yes, describe each episode.
RCRA HAZARDOUS WASTE RECEIVED BY TRUCK, RAIL, OR DEDICATED PIPELINE:
F.9. RCRA Waste. Does the treatment works receive or has it in the past three years received RCRA hazardous waste by truck, rail or dedicated pipe?
❑ Yes ® No (go to F.12) -
FA0. Waste transport Method by which RCRA waste is received (check all that apply):
❑ Truck ❑ Rail ❑ Dedicated Pipe
F.11. Waste Description. Give EPA hazardous waste number and amount (volume or mass, specify units).
EPA Hazardous Waste Number Amount Units
NIA
CERCLA (SUPERFUND) WASTEWATER, RCRA REMEDIATION/CORRECTIVE ACTION
WASTEWATER, AND OTHER REMEDIAL ACTIVITY WASTEWATER:
F.12. Remediatlon Waste. Does the treatment works currently (or has it been notified that it will) receive waste from remedial activities?
❑ Yes (complete F.13 through FAA.) ® No
F.13. Waste Origin. Describe the she and type of facility at which the CERCLA/RCRA/or other remedial waste originates (or is excepted to origniate in
the next five years).
N/A
F.14. Pollutants. List the hazardous constituents that are received (or are expected to be received). Include data on volume and concentration, if
known. (Attach additional sheets if necessary.)
NIA
FA 5. Waste Treatment
a. Is this waste treated (or will be treated) prior to entering the treatment works?
❑ Yes ❑ No
If yes, describe the treatment (provide information about the removal efficiency):
N/A
b. Is the discharge (or will the discharge be) continuous or Intermittent?
❑ Continuous ❑ Intermittent If intermittent, describe discharge schedule.
NIA
END OF PART F.
REFER TO THE APPLICATION OVERVIEW (PAGE 1) TO DETERMINE WHICH OTHER PARTS
OF FORM 2A YOU MUST COMPLETE
EPA Form 3510-2A (Rev. 1-99). Replaces EPA forms 7550-6 & 7550-22. Page 19 of 21

.►
Ak
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Eagle Road WWTP, NC0006033
Renewal
Catawba River Basin
Additional Information for NPDES Permit Application
Section B.3. Process Flow Diagram or Schematic
Process Flow Description
The Eagle Road WWTP is a 4-mgd facility operated by Two Rivers Utilities which
discharges to the South Fork Catawba River. Influent wastewater enters the plant and
goes through a fine mechanical screen to remove debris followed by a Parshall flume
with ultrasonic flow meter. Following this preliminary treatment, the flow enters the
aeration basin where it is aerated in contact with activated sludge.' Caustic soda may be
fed to increase the pH. Aluminum Chlorohydrate is added to the aeration basin effluent
and then solids are allowed to settle in one of two clarifiers. The activated sludge from
these clarifiers may be directed either back to the aeration basin or to the aerobic digester.
Liquid from the clarifiers travels the chlorine contact basin where a sodium hypochlorite
solution is introduced for disinfection. At the end of this basin, a sodium bisulfate
solution is used to dechlorinate the water. The effluent flow is then aerated via post
aeration blowers and diffusers before being discharged to the South Fork Catawba River.
Two diesel generators provide a backup power source for the facility. —

Eagle Road WWTP Flow Diagram
Plant Influent Flow
Aeration Influent
Aeration Basin Flow Pattern
Aeration Effluent Flow
Clarifier Effluent Flow
Chlorine Contact Basin Flow
Dechlorination Basin Flow
Plant Effluent Flow (To South Fork River
�/- RAS Flow
WAS Flow/Wasting Well Return to Aeration
Supernatant Flow

) ) )) ) )) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) )) ) ) )
Eagle Road Plant Schematic Page 2 of
Effective Date: 12/2/13 Corresponding Procedure: WEG-0100.001
Revision Date: 12/2/13
Revision A: 0

) )))) ) ) ) ) ) ) ) ) ) ))) ) )) )))) )) ) ) ))) ) ) ) ) ) ) ) ) )) )) )
Eagle Road Plant Schematic Page 3 of 4
Document U: WEG-0102.001A ••THIS IS AN UNCONTROLLED COPY OF A CONTROLLED DOCUMENT PRINTED 7128114 AT 3:39 PM••.
Effective Date: 12/2/13 Corresponding Procedure: WEG-0100.001
Revision Date: 12/2/13
Revision k: 0

Eagle Road WWTP Sampling Map
*Aeration Effluent Weir
f�
�Pr
` RAS * Digester Supernatant
*Aeration Influent
Effluent Composite *
Effluent Grabs *'
* Influent Composite
* Influent Grabs
Art Clarifier Influent Splitter Box
ar
* * WAS
C �ifierEfflutComposite*e
* Dechlormation Basin Composite

FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Eagle Road WWTP, NC0006033
Renewal
Catawba River Basin
Additional Information for NPDES Permit Application
Section B.4. Operation/Maintenance Performed by Contractor(s).
If yes, list the name, address, telephone number, and status of each contractor and describe the
contractor's responsibilities (attach additional pages if necessary).
Name: Carolina Engine
Mailing Address: P.O. Box 1095
Charlotte, N.C. 28201 1095
Telephone Number: ( 704) 596-6700
Responsibilities of Contractor: Preventative and corrective maintenance on emergency generators.
Name: EMA Resources, Inc.
Mailing Address: 755 Yadkinville Road
Mocksville, NC 27028
Telephone Number: ( 336) 399-6671
Responsibilities of Contractor: Transport and land application of biosolids generated from treatment
Name: Expert Services CITI
Mailing Address: P.O. Box 37047
Charlotte, NC 28237
Telephone Number: ( 704) 969-9200
Responsibilities of Contractor: Repairs, adjustments and upgrades to SCADA system.
Name: Fortech, Inc.
Mailing Address: 2124 Wilkinson Blvd
Charlotte, NC 28208
Telephone Number: [phone]
Responsibilities of Contractor: Annual calibration of flow meters.
Name: Kemp Incorporated
Mailing Address: 2217 Lynmore Drive
Sherrills Ford, N.C. 28673
Telephone Number: ( 828,) 478-3040
Responsibilities of Contractor: Corrective maintenance as needed.

FACILITY NAME AND PERMIT NUMBER: PERMIT ACTION REQUESTED: RIVER BASIN:
Eagle Road WWTP, NC0006033 Renewal Catawba River Basin
Additional Information for NPDES Permit Application
Section B.4. Operation/Maintenance Performed by Contractor(s) (Continued)
Name: Republic Waste Services
Mailing Address: P.O. Box 219
Pineville, NC 28134
Telephone Number: [phone]
Responsibilities of Contractor: Disposal of waste from exit and bar screenings.
Ak

Ak
^
FACILITY NAME AND PERMIT NUMBER:
PERMIT ACTION REQUESTED:
RIVER BASIN:
Am%
Eagle Road WWTP, NC0006033
Renewal
Catawba River Basin
Additional Information for NPDES Permit Application
^
^ Sludge Management Plan for
odik Eagle Road Wastewater Treatment Plant
.� NPDES Permit # NC0006033
The Eagle Road Wastewater Treatment Plant (WWTP) design for sludge handling consists of aerobic
'► sludge digestion followed by land application. This plan describes the processes in place for treating
.% and disposing of this material.
..
Aerobic Digestion:
,.� The aerobic digestion system consists of one 1,500,000 gallon digester lagoon with two 50 BHP floating
aerators. This aerobic digester treats waste sludge settled from the two WWTP clarifiers. On average,
approximately 120,000 gallons of wasted solids are sent to this digester each month for treatment. To
^ further thicken the biosolids, liquid is decanted off the digester and fed back into the wastewater
treatment process.
Biosolids are stored in this 1,500,000 gallon digester until land application is performed. Additionally
.. Two Rivers Utilities operates a residuals storage facility at its Resource Recovery Farm located between
^ Dallas and Cherryville. This facility is capable of storing an additional eight million gallons of biosolids
�► when application activities are hindered by inclement weather.
^ The Eagle Road WWTP currently complies with the 503 pathogen reduction requirement for Class B
^ biosolids by aerobic digestion. Pathogen reduction is demonstrated by fecal coliform testing. Vector
+ attraction reduction is demonstrated by Option 3 503.33(b)(3) - 30-Day Bench Scale Test (Aerobic
odft Digestion).
'"k
Land Application Program:
For beneficial reuse of these biosolids, Two Rivers Utilities utilizes land application for disposal of these
solids. Two Rivers Utilities contracts with EMA Resources to perform this land application. Biosolids are
land applied to 3,041 acres of local farmland in North Carolina, in accordance with NC DENR Land
Application of Residual Solids (503) Permit WQ0001793. One hundred seventy-seven of the acres in
North Carolina are on TRU owned land at the Resource Recovery Farm and the remainder is private
�► farmland.
A%
^
^
^
Ink

I
a ril 1-:1, p
6
-ji

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TWO VERB
UTII.ITI ]TIE
Ak We are TRU to our customers!
June 23, 2014
Mike Templeton
Division of Water Resources — Wastewater Branch
�. 1601 Mail Service Center
Raleigh, NC 27699-1601
�'►
RE: NPDES Permit Renewals for Two Rivers Utilities' W WTPs included In the Lake Wylie TMDL
Long Creek Wastewater Treatment Plant (NPDES # N00020184)
Eagle Road Wastewater Treatment Plant (NPDES # NC0006033)
Crowders Creek Wastewater Treatment Plant (NPDES # N00074268)
Dear Mr. Templeton:
The NPDES Permits for wastewater treatment plants owned by Two Rivers Utilities (TRU) are due for
renewal in 2015 [Long Creek WWTP (NC0020184) and Eagle Road WWTP (NC0006033) expire on
1/31/15 and Crowders Creek WWTP (NC0074268) expires on 8/31/15]. All three TRU wastewater
facilities are part of the Lake Wylie TMDL for Total Nitrogen (TN) and Total Phosphorus (TP).
TRU has built and operated modem nutrient removal processes which have greatly reduced nutrient
Aft loads to the Lake Wylie watershed. Through regionalization efforts by TRU, five non -nutrient removal
treatment plants have been taken out of service. Projects that will decommission three more non -
nutrient removal facilities are underway. This wastewater is or will be treated at one of TRU's nutrient
removal facilities, further reducing the nutrient loads into the Lake Wylie watershed.
,^ To help these regionalization efforts make practical and long-term financial sense for our utility, TRU is
,^ requesting revisions to nutrient limits at its facilities with these permit renewals.
TRU requests:
�e
Ask
•
Ak
Ak
.t,
,^
Allocations from the decommissioned facilities (whether specifically allocated or part of the
non -point allocation) are transferred to the TRU facility that receives its wastewater (provided it
discharges to the same arm).
Instead of the current concentration limits, we request these allocations be presented in
pounds/day mass load limits and that an aggregate / bubble limit be given to Long Creek WWTP
and Eagle Road WWTP for Total Nitrogen (TN) and Total Phosphorus (TP).

History:
All WWTP discharges are currently included in the Lake Wylie TMDL. When the TMDL was developed,
large plants (greater than 1.0 mgd) were given a specific allocation as part of the Lake Wylie TMDL, and
small plants (less than 1.0 mgd) were included in the non -point allocation.
A summary of the decommissioned facilities is shown below:
Summary of Decommissioned Facilities
Potential
TN
Regional
Permitted
Summer
(lb/yr)x
TP
WWTP
Year
Status
WWTP
Flow
TN Limit
3
(lb/d}
(mgd)
(lb/d)l
Ranlo
1998
Complete
Long Creek
0.20
10
5,164
1.7
High Shoals
2012
Complete
Long Creek
0.03
2
775
0.3
Stanley
2015
Construction
Long Creek
0.50
25
12,910
4.2
McAdenville
2016
Design
Long Creek
0.13
7
3,357
1.1
Pharr Yarns
2016
Design
Long Creek
1.0
50
25,821
8.3
Bessemer
2002
Complete
Crowders
1.5
75
13
City
Creek
Catawba
Creek
1999
Complete
Long Creek
9.0
300
38
"Calculated using permitted flow and 6.0 mg/L for the summer months
2Calculated using 6.0 mg/L in the summer (214 days) and 12.0 mg/L in the winter (151 days) —same
Best Professional Judgment (BPI) methodology used for Eagle Road WWTP annual mass load for TN
3Calculated using 1.0 mg/L year round
4 Lake Wylie TMDL allocation
The City of Gastonia's Catawba Creek WWTP was decommissioned and its flow routed to the Long Creek
WWTP. No request is being made at this time for the transfer of that TMDL allocation of 300 lbs/day of
TN and 38 ibs/day of TP. However, since the flow is treated at the Long Creek WWTP, we wish to
document the decommissioning of that facility potentially made a major contribution to the overall
nutrient reduction in the Lake Wylie watershed.
TRU and HDR staff met previously with DWR staff in Raleigh in August 2010 and August 2013 to discuss
the renewal of the NPDES permits. Meeting minutes for both meetings were recorded and submitted to
all attendees. During both of those meetings, as well as on subsequent phone conversations, the topic
of receiving "credit" in the form of a higher nutrient allocation in exchange for taking these smaller
WWTPs out of service was discussed. An aggregate / bubble limit for Long Creek WWTP and Eagle Road
WWTP for TN and TP was also discussed. DWR stated that both of these requests were reasonable, met
the intent of the TMDL, and could be implemented in the next NPDES permit renewals.
Page 2 of 5

Quantitative Justification:
The Long Creek, Eagle Road, Stanley, McAdenville and Pharr Yarns wastewater treatment plants all
discharge into the South Fork Arm in the Lake Wylie TMDL. The former Ranlo WWTP and both of High
Shoals' wastewater facilities, discharged into that arm as well. Since TRU operates both the Long Creek
WWTP and Eagle Road WWTP, we are requesting an aggregate or bubble mass load limit between the
two treatment facilities for TN and TP.
While only the Long Creek WWTP and Eagle Road WWTP were given specific allocations in the TMDL,
the other -facilities were included in'the non -point nutrient allocation. If these non -specifically allocated
facilities were discharging at 6 mg/L TN in the summer months and 12 mg/L TN in the winter months,
and 1 mg/L TP year-round, they would have the potential to discharge a combined total of 132 lbs/day
of TN and 15.5 lbs/day of TP. Since the Long Creek WWTP is receiving the flow from these facilities, we
request that these pounds be included in the aggregate allocation for Long Creek and Eagle Road
WWTPs. The pounds are based on the limits they could potentially have received, not the higher
concentrations that they were actually discharging.
TOTAL NITROGEN:
Permitted
TMDL
Calculated lbs/year at 6
South Fork Arm of TMDL.
Flow
Allocation
mg/I summer &
Plant
(mgd)
(Ibs/day)
12 mg/L winter
Long Creek
16
801
413,130
Eagle Road
4.0
*
103,283
Ranlo
0.2
*
5,164
High Shoals
0.03
*
775
Stanley
0.5
*
12,910
McAdenville
0.13
*
3,357
Pharr Yarns
1.0
*
25,821
Total:
*Included in Non -Point Allocation
564,439
Permitted
TMDL
Calculated Ibs/year at
Crowders Arm of TMDL.
Flow
Allocation
6 mg/I summer &
Plant
(mgd)
(Ibs/day)
12 mg/L winter
Crowders Creek
6.0
300
154,924
Bessemer Bessemer City
7575
38,731
Total:
193,655
Page 3 of 5

'`�` TOTAL PHOSPHORUS:
e0ft,
South Fork Arm of TMDL
Plant
Long Creek
Eagle Road
Ranlo
High Shoals
Stanley
McAdenville
Pharr Yarns
Permitted
TMDL
Flow
Allocation
Calculated Ibs/day
Calculated Ibs/year at
(mgd)
(ibs/day)
at 1 mg/L
1 mg/L year-round
16
133
133
48,545
4.0
90**
33**
12,045
0.2
*
1.7
621
0.03
*
0.25
91
0.5
*
4.2
1,533
0.13
*
1.1
402
1.0
*
8.3
3,030
Total: 182 66,266
* Included in Non -Point Allocation
"Instead of the 90 Ibs/day allocation in the TMDL, only amount currently permitted is being requested.
Permitted
TMDL
Crowders Arm of TMDL
Flow
Allocation
Plant
(mgd)
(Ibs/day)
Crowders Creek
6.0
So
Bessemer City
1.5
13
Total:
63
Re est:
In summary, we request limitations for total nitrogen and total phosphorus expressed as follows:
LONG CREEK WWTP (NPDES #NC0020184), & EAGLE ROAD WWTP (NPDES #NC0006033)
Parameter
Limits
Monitoring Requirements
Monthly
Weekly
Daily
Measurement
Sample
Sample
Average
Average
Maximum
Frequency
Type
Location
Total Nitrogen
Annual Limit:
Weekly
Composite
Effluent
564,439 pounds/year'
Total Phosphorus
182
Weekly
Composite
Effluent
Ibs/day2
Notes:
1. The annual limit will be the combined sum of the monthly mass loadings from both Long Creek WWTP
(NPDES #NC0020184) and Eagle Road WWTP (NPDES #NC0006033), and all decommissioned WWTPs.
2. Monthly average limit for Total Phosphorus is for the combined total of the discharge from Long Creek
WWTP (NPDES #NC0020184) and Eagle Road WWTP (NPDES #NC0006033), and all decommissioned
WWTPs. This will be computed as the sum of the monthly averages in Ibs/day from each discharge.
Page 4 of 5

CROWDERS CREEK WWTP (NPDES #NC0074268)
Parameter
Limits
Monitoring Requirements
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Total Nitrogen
Annual Limit:193,265
pounds/year'
Weekly
Composite
Effluent
Total Phosphorus
63 Ibs/day I
Weekly
Composite
Effluent
Notes:
I. The annual limit will be the combined sum of the monthly mass loadings from both Crowders Creek
WWTP (NPDES #NC0020184) and Bessemer City WWTP.
We greatly appreciate your openness to consider these permit modifications. Once you have had a
chance to review this request, we would like to have the opportunity to discuss it further. We will
contact you to schedule a meeting in July.
Sincerely,
Matt Ber ardt
!��"I o,''k
Director
Two Rivers Utilities
cc: Tom Belnick, DWR
Kathy Stecker, DWR
Larry Cummings, TRU Wastewater Treatment
Page 5 of 5

To: Complex Permitting Unit
Attention: Teresa Rodriquez
SOC Priority Project: No
Date: October 10, 2014
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Gaston
NPDES Permit No.: NC0006033
PART I - GENERAL INFORMATION
Facility and Address: Eagle Road WWTP Physical Location
City of Gastonia 661 Eagle Road
PO Box 1748 Belmont, NC 28012
Gastonia, N.C. 28053-1748
2. Date of Investigation: October 7, 2014
Report Prepared By: Wes Bell, Environmental Specialist
RECEIVED/DENR/DWR
OCT 2'0 2014
Water Quality
Permitting Section
4. Person Contacted and Telephone Number: Hubert Hampton/ORC [phone]; Stephanie
Scheringer/Asst. Division Manager of Operations [phone]; David Shellenbarger/Asst. Division
Manager of Compliance [phone]
Directions to Site: From the junction of Interstate I-85 and Exit 26 (Mt. Holly/Belmont/Belmont Abbey
College), turn right on Belmont/Mt. Holly Road for approximately 0.6 miles and turn right on N. Central
Avenue. Travel approximately 0.8 miles and turn right on South Main Street for approximately 0.4
miles. Turn right on Eagle Road and travel 0.8 miles and turn left on the W WTP's driveway (before
railroad track).
6. Discharge Point(s), List for all discharge Point:
Outfall 001
Latitude: 35014' 01"
Longitude: 810 03' 52"
See USGS Map included with the renewal application for specific location of the outfall.
USGS Quad No.: G 14 NE
Receiving Stream or Affected Surface Waters: South Fork Catawba River
a. Classification: WS-V
b. River Basin and Subbasin No.: 03-08-36
PART H - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater and description of wastewater source(s) of each outfall:

Page Two
Outfall 001— 4.0 MGD — domestic wastewater (no SIUs). The existing W WT facilities consist of
mechanical bar screen with manual bypass, flow equalization (taken out of service), aeration basin with
floating aerators and curtain baffle, secondary clarification (2-total), liquid chlorination (sodium
hypochlorite) , chlorine contact chamber, liquid dechlorination (sodium bisulfite), chemical feed/storage
facility, flow measurement, aerobic digestor, and standby power.
b. Pretreatment Program: The City implements an approved pretreatment program; however, there
are no SIUs for this collection system/WWTP.
PART III -.OTHER PERTINENT INFORMATION
Special monitoring or limitations (including toxicity) requests:
The City requests the following permit changes:
1) Total Nitrogen and Total Phosphorus limits be expressed as a single lbs/day aggregate or bubble
limit (for both Eagle Road WWTP and Long Creek WWTP—NC0020184) and nutrient credits
be applied to these permits for the NPDES facilities that have or will soon to be connected to one
of these WWTPs.
2) Reduction of the effluent monitoring frequencies for BOD, TSS, ammonia, and fecal coliform
according to the Division's criteria for exceptionally performing facilities (data attached to
renewal package).
3) Reduction of the instream monitoring requirements to once per week year-round.
4) The removal of the daily effluent conductivity monitoring requirement.
PART IV - EVALUATION AND RECOMMENDATIONS
The WWTP appeared to be properly operated and well maintained at the time of the inspection. The
WWTP's effluent was clear with no suspended solids or foam with fish being observed in the effluent
discharge. Although the City maintains an approved pretreatment program, there are no SIUs connected to this
WWTP and therefore, this Office has no objections to the removal of the effluent conductivity monitoring
requirement. Note: Instream conductivity monitoring should also be evaluated even though not requested. City
personnel have previously met with the Division's Permitting Staff regarding the incorporation of nutrient limits
and credits for the NPDES facilities that have or will soon to be connected to the City's WWTPs. Mr. Larry
Cummings, Division Manager of Wastewater Treatment and the listed applicant contact, has recently retired as
of August 31, 2014. Future correspondence can be made to the attention of Mr. David Shellenbarger, Asst.
Division Manager of Compliance. It is recommended that the subject Permit be renewed following review by
the Division's Complex Permitting Staff.
Signature o eport Preparer Date
Water Quality Regional Supervisor Date
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