HomeMy WebLinkAboutNC0026433_Draft Permit_20190417 ,
ROY COOPER s x,' ` "°r.
Governor
MICHAEL S.REGAN M• -
Secretary T"
LINDA CULPEPPER NORTH CAROLINA
Director Environmental Quality
April 17, 2019
Mr. Kenneth P. Keel
Utilities Director
Town of Hillsborough
PO Box 429
Hillsborough, North Carolina 27278
Subject: Draft NPDES Permit Renewal
Permit NC0026433
Hillsborough WWTP
Orange County
Grade IV Biological WPCS
SIC Code 4952
Dear Mr. Keel:
Enclosed with this letter is a copy of the Draft NPDES permit renewal for your facility. Please
review this draft carefully to ensure thorough understanding of the requirements and conditions it
contains. There are several changes from the existing permit, including the following:
• Based on the reasonable potential analysis (RPA) showing no reasonable potential to
violate state water quality standards, the monitoring requirement for
dichlorobromomethane has been removed from the permit [See A.(1)].
• Per the results of instream waste concentration(IWC)-based calculations for ammonia-
nitrogen, ammonia nitrogen limits have been changed to reflect appropriate, separate
limits for summer and winter months [See A.(1.)].
• To highlight the Town's reserved nutrient allocation in the Neuse River Estuary, some of
the wording has changed in Special Condition A. (6.), Nutrient Allocations.
• The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by
the NC Environmental Management Committee(EMC) on November 13, 2014. The US
EPA subsequently approved the WQS revisions on April 6, 2016 with some exceptions.
The NC Division of Water Resources NPDES Permitting Unit is required to implement
the new dissolved metal standards in all permits public noticed after April 6, 2016. The
new standards for most metals include acute standards. Further, the freshwater standards
for several metals are expressed as the dissolved form of the metals, and seven metals
have hardness-dependent equations. As a result, the NPDES Permitting Unit will need
site-specific effluent hardness data and instream hardness data, upstream of the discharge,
for each facility monitoring these metals in order to calculate permit limitations. Effluent
hardness and instream hardness sampling,upstream of the discharge, has been added to
the permit at a monitoring frequency of quarterly [See A.(1.)].
• The Town of Hillsborough reported Total Cadmium, Total Lead, and Total Silver at less
than detection, with detection levels < 2 µg/L, < 10 µg/L, and < 5 µg/L respectively, in
the Effluent Pollutant Scans. The Town's allowable discharge concentrations are 1.05
µg/L, 6.59 µg/L and 0.07 µg/L for Total Cadmium, Total Lead and Total Silver,
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respectively. DWR's laboratory identifies the target Practical Quantification Limits
(PQLs) for Total Cadmium, Total Lead and Total Silver as 0.5 µg/L, 2 µg/L, and 1 µg/L,
respectively. 15A NCAC 2B .0505 (e) (4)requires that all test procedures must produce
detection and reporting levels that are below the permit discharge requirements and all
data generated must be reported to the approved detection level or lower reporting level
of the procedure. If no approved methods are capable of achieving a detection level
below the permit discharge requirement(or allowable concentration)the method with the
lowest detection level must be used. The Town should use sufficiently sensitive test
methods for all pollutants,including when performing Effluent Pollutant Scans.
• Some of the wording has changed in Special Condition A. (3.), Chronic Toxicity Permit
Limit,please review each paragraph carefully.
• Special Condition A. (4.) has been modified to include the specific three years in which
the Effluent Pollutant Scan shall be performed (2021, 2022, and 2023). In addition, at the
end of the Special Condition, 2nd species Toxicity Testing Requirements for municipal
permit renewals per Federal Regulations [40 CFR 122.21(j)(5)] have been added.
• Federal regulations require electronic submittal of all discharge monitoring reports
(DMRs)and program reports. The requirement to continue reporting discharge monitoring
data electronically using the NC DWR's Electronic Discharge Monitoring Report(eDMR)
internet application has been added to your NPDES permit[See Special Condition A. (6.)].
• Parameter codes have been added to the Effluent Limitations and Monitoring Requirements
[ See A. (1.)].
• Language has been added to Footnote 1 to account for influent and effluent abbreviations
[See A. (1.)].
• Regulatory citations have been added to the permit.
The NPDES Standard Conditions(Parts II, III, and IV)are not included with this draft. The latest
version is available at https://bit.ly/2BZ4xxx and can be viewed online or downloaded as a PDF
file.
Concurrent with this notification the Division is publishing a notice in a newspaper having
circulation in the general Orange County area, soliciting public comments on this draft permit.
Please provide any written comments you may have to the following: NCDEQ/DWR,NPDES
Permitting Branch, 1617 Mail Service Center, Raleigh,NC 27699-1617 no later than 30 days
after receipt of this draft permit.
Following the 30-day public comment period, the Division will review all pertinent comments
and take appropriate action prior to issuing a final permit. If you have questions concerning this
draft permit, please call me at(919) 707-3609 or by email at nick.coco@ncdenr.gov.
Sincerely,
Nick Coco, Engineer
NPDES Complex Permitting Unit
Hardcopy: NPDES File
s
es
Ecopy: DWR/Raleigh Regional Office/Water Quality/Rick Bolich
US EPA Region 4
DWR/Operator Certification Program/Maureen Kinney
DWR/Aquatic Toxicology Branch/Susan Meadows
DWR/Public Water Supply Raleigh Regional Engineer/Allen Hardy
NCWRC/Western Piedmont Coordinator/Olivia Munzer
Town of Hillsborough/WWTP Superintendent/Jeff Mahagan
Page 2 of 2
Permit NC0026433
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 provision of North Carolina General Statute 143-215.1,other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act,as amended,the
Town of Hillsborough
is hereby authorized to discharge wastewater from a facility located at the
Hillsborough WWTP
355 Elizabeth Brady Road
Hillsborough
Orange County
to receiving waters designated as the Eno River in the Neuse River Basin
in accordance with effluent limitations,monitoring requirements, and other conditions set forth in
Parts I, II,III and IV hereof.
This permit shall become effective . . Month xx,2019.
This permit and authorization to discharge shall expire at midnight on January 31,2024.
Signed this day Month xx,2019.
DRAFT
Linda Culpepper,Director
Division of Water Resources
By Authority of the Environmental Management Commission
Permit NC0026433
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 Town of Hillsborough
is hereby authorized to:
1. Continue to operate an existing 3.0 MGD wastewater treatment plant that includes the
following components:
• Automatic influent step-screen with back-up manual bar screen
• Aerated grit removal system
• Influent flow meter
• Influent composite sampler
• 5-stage Biological Nutrient Removal Treatment Process
• Two (2) circular clarifiers
• Four (4) tertiary deep-bed sand filters with denitrification capabilities
• Two(2) chlorination contact basins
• Post aeration system
• Effluent flow meter with recorder
• Automated effluent composite sampler
• Chemical coagulant feed system used for phosphorous removal
• Chemical flocculant feed system used for phosphorous removal
• Chemical pH control feed system used for pH and alkalinity control
• Chemical carbon feed system used for denitrification
• Three (3) sludge holding basins with a total capacity of 428,000 gallons
• Solids handling building with one (1)belt-filter press
• Chemical flocculant feed system used for sludge dewatering
• Lime addition system for sludge conditioning/treatment
• Back-up power generator with automated switch-gear
• Supervisory Control and Data Acquisition(SCADA) system to monitor and/or control all
critical processes and equipment in the facility
This facility is located at Hillsborough WWTP,355 Elizabeth Brady Road in Orange County.
Discharge from said treatment works at the location specified on the attached map into Eno River,
classified WS-V;NSW waters in the Neuse River Basin.
Page 2 of 14
Permit NC0026433
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.] Grade IV Biological Water
Pollution Control System [15A NCAC 08G .0302]
a. During the period beginning on the effective date of this 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:
PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code
Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location 2
Flow 50050 3.0 MGD Continuous Recording E
Total Monthly Flow,
82220 Monitor&Report MonthlyCalculated E
MG/month p
Total Residual Chlorine 50060 19 Ng/L Daily Grab E
(TRC)4
pH 00400 Between 6.0 and 9.0 standard units Daily Grab E
Dissolved Oxygen 00300 Daily Average >_ 5.0 mg/L Daily Grab E
Temperature(°C) 00010 Daily Grab E
BOD5(20°C)5 C0310 5.0 mg/L 7.5 mg/L 2/Week6 Composite I&E
Total Suspended Solids C0530 30.0 mg/L 45.0 mg/L 2/Week6 Composite I&E
(TSS)5 9 po
Ammonia(NH3 as N) C0610 1.0 mg/L 3.0 mg/L 2/Week6 Composite E
(April 1 -October 31)
Ammonia(NH3 as N)
(November 1 -March C0610 2.5 mg/L 7.5 mg/L 2/Week6 Composite E
31)
Fecal Coliform 31616 200/100 rnL 400/100 mL 2/Week6 Grab E
(geometric mean)
TKN, mg/L7 00625 Monitor and Report Weekly Composite E
NO2-N + NO3-N, mg/L7 00630 Monitor and Report Weekly Composite E
Total Nitrogen, mg/L 3'7 C0600 Monitor and Report Weekly Composite E
QM600 Monitor and Report(lb/mo) Monthly Calculated E
Total Nitrogen Load 3.e 50,228 lb/yr(through 12/31/2035)
QY600 10,422 lb/yr(effective 1/1/2036) Annually Calculated E
Total Phosphorus9 C0665 2.0 mg/L(Quarterly Average) Weekly Composite E
QM665 Monitor and Report(Ib/mo) Monthly Calculated E
Total Phosphorous
Load 340 QM665 1,352 Ib/yr(through 12/31/2035) Annually Calculated E
572 lb/yr(effective 1/1/2036)
Total Copper, pg/L11 01042 Quarterly Composite E •
Total Zinc, pg/L11 01092 Quarterly Composite E
Chronic Toxicity 11 TGP3B Quarterly Composite E
Total Hardness[as 00900 Monitor&Report Quarterly Composite E
CaCO3], mg/L12
Page 3 of 14
Permit NC0026433
PARAMETER EFFLUENT LIMITS MONITORING REQUIREMENTS
Parameter Code
Monthly Weekly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location 2
Effluent Pollutant NC01 Monitor and Report Footnote 13 E
Scan
Dissolved Oxygen, 00300 Monitor& Report Variable14 Grab U, D, &Dz
mg/L
Temperature(°C) 00010 Monitor&Report Variable14 Grab U, Di &D2
Total Hardness[as Report 00900 Monitor& QuarterlyGrab U
CaCO3],mg/Lis
Footnotes:
1. The Permittee shall submit discharge monitoring reports electronically using NC DWR's eDMR application system.
See Special Condition A.(9.)
2. I=Influent,E=Effluent,U=upstream 2,300 feet from outfall,D1=downstream at NCSR 1561,D2=downstream at
NCSR 1401.
3. Calculation of monthly and annual TN Load(or TP Load)must be conducted as defined in Special Condition A.(3.).
4. The TRC limit and monitoring requirements apply only if chlorine is used as a disinfectant(or elsewhere in the
process).The Division shall consider all effluent TRC values reported below 50 pg/L to be in compliance with the
permit.However,the Permittee shall continue to record and submit all values reported by a North Carolina certified
laboratory(including field certified),even if these values fall below 50 pg/L.
5. The monthly average effluent BOD5 and Total Suspended Solids(TSS)concentrations shall not exceed 15 percent of
the respective influent value(85%removal).
6. 2/Week sampling must occur on any two non-consecutive days during the calendar week.
7. For a given wastewater sample,TN=TKN+(NOrN+NO3-N),where TN is Total Nitrogen,TKN is Total Kjeldahl
Nitrogen,and(NO2-N+NO3-N)are Nitrite and Nitrate Nitrogen,respectively.
8. Compliance with this limit shall be determined in accordance with Special Condition A.(4.)of this permit.
9. The quarterly average for total phosphorus shall be the average of composite samples collected weekly during each
calendar quarter(January-March,April-June,July-September,October-December).
10. Compliance with this limit shall be determined in accordance with Special Condition A.(5.)of this permit.
11. Chronic Toxicity(Ceriodaphnia)Pass/Fail at 90%concentration to be sampled in February,May,August and
November. See Special Condition A.(2.)for further details. Total copper and total zinc shall be measured in
conjunction with toxicity test.
12. Quarterly monitoring for Effluent Total Hardness shall be conducted in conjunction with hardness-dependent
metals sampling.
13. See special condition A.(7.).
14. Instream samples shall be grab samples and shall be collected three times per week during the months of June,July,
August and September and weekly during the remaining months of the year.Station monitoring should be
conducted as close to the same time of day as feasible.
15. The Permittee shall sample instream hardness,upstream of the facility's discharge.The sample shall be
representative of the hardness in the receiving stream. If the Permittee is a member of the Monitoring Coalition
Program,sampling for instream hardness may be waived as long as the Monitoring Coalition agrees to sample
hardness at the nearest upstream location,at a minimum frequency of quarterly,and the Permittee has obtained
approval from DWR-NPDES Permitting Unit that the upstream station being monitored by the Coalition is
representative of the receiving stream for this discharge.The Permittee is responsible for submitting instream
hardness test results with its permit renewal application package.If Coalition membership is cancelled or the
Coalition terminates instream hardness sampling at the approved station,the Permittee will immediately notify the
Division and resume sampling for instream hardness,upstream of its discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 4 of 14
Permit NC0026433
A. (2.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[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 90%.
The permit holder shall perform at a minimum,quarterly monitoring 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
February,May, August and November. These months signify the first month of each three month
toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained
during representative effluent discharge and shall be performed at the NPDES permitted final effluent
discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below
the permit limit,then multiple-concentration testing shall be performed at a minimum,in each of the
two following months as described in "North Carolina Phase 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, DWQ Form AT-3
(original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental 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 Environmental 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.
Page 5 of 14
Permit NC0026433
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.
If the Permittee monitors any pollutant in the effluent as specified in Part II.E. 5.b. of this permit or in
conjunction with effluent toxicity testing,the results of such monitoring shall be included in the
calculation&reporting of the data submitted on the DMR&all AT Forms submitted.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum
control organism survival,minimum control organism reproduction,and appropriate
environmental controls,shall constitute an invalid test and will require immediate follow-up
testing to be completed no later than the last day of the month following the month of the initial
monitoring.
A. (3.) CALCULATION AND REPORTING OF NUTRIENT LOADS
[G.S. 143-215.1(b)]
a. The Permittee shall calculate monthly and annual TN (or TP) Loads as follows:
i. Monthly Discharge Load (lb/mo,TN or TP) = 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/month)
8.34 = conversion factor,from(mg/L x MG) to pounds
ii. Annual Discharge Load (lb/yr,TN or TP) =Sum of the 12 Monthly TN (or TP)
Loads for the calendar year
The Permittee shall report monthly Total Nitrogen (and Total Phosphorus) results (mg/L and
pounds/month) in the appropriate discharge monitoring report for each month and shall report
each year's results (pounds/year) with the December report for that year.
A. (4.) ANNUAL LIMITS FOR TOTAL NITROGEN
[G.S. 143-215.1(b)]
a. Total Nitrogen(TN) allocations and TN Load limits for NPDES dischargers in the Neuse
River basin apply on a calendar year basis.
b. For any given calendar year, the Permittee shall be in compliance with the annual TN Load
limit in this Permit if:
i. the Permittee's annual TN discharge is less than or equal to its TN Load limit, or
ii. the Permittee is a co-permittee member of a compliance association.
c. If the Permittee is not a co-permittee member of a compliance association and the Permittee's
cumulative annual TN discharge exceeds the effective TN Load limit in this permit at any
Y
point during the calendar year,the Permittee is in violation of its TN Load limit, and each
day of a continuing violation shall constitute a separate violation.
Page 6 of 14
Permit NC0026433
d. The TN Load limit in this Permit(if any) may be modified as the result of allowable changes
in the Permittee's TN allocation.
i. Allowable changes include those resulting from purchase of TN allocation from the
Wetlands Restoration Fund;purchase,sale,trade,or lease of allocation between the
Permittee and other dischargers;regionalization;and other transactions approved by
the Division.
ii. The Permittee may request a modification of the TN Load limit in this Permit to reflect
allowable changes in its TN allocation. Upon receipt of timely and proper application,
the Division will modify the permit as appropriate and in accordance with state and
federal program requirements.
iii. Changes in TN limits become effective on January 1 of the year following permit
modification. The Division must receive application no later than August 31 for changes
proposed for the following calendar year.
iv. Application shall be sent to:
NCDWR/ NPDES Programs
Attn: Neuse River Basin Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
e. If the Permittee is a member and co-permittee of an approved compliance association,its TN
discharge during that year is governed by that association's group NPDES permit and the TN
limits therein.
i. The Permittee shall be considered a Co-Permittee Member for any given calendar year
in which it is identified as such in Appendix A of the association's group NPDES
permit.
ii. Association roster(s) and members' TN allocations will be updated annually and in
accordance with state and federal program requirements.
iii. If the Permittee intends to join or leave a compliance association,the Division must be
notified of the proposed action in accordance with the procedures defined in the
association's NPDES permit.
(A) Upon receipt of timely and proper notification, the Division will modify the
permit as appropriate and in accordance with state and federal program
requirements.
(B) Membership changes in a compliance association become effective on January 1 of
the year following modification of the association's permit.
f. The TN monitoring and reporting requirements in this Permit remain in effect until
expiration of this Permit and are not affected by the Permittee's membership in a compliance
association.
A. (5.) ANNUAL LIMITS FOR TOTAL PHOSPHORUS
[G.S. 143-215.1(b)]
a. Total Phosphorus (TP) allocations and TP Load limits for NPDES dischargers in the Falls
Lake watershed apply on a calendar year basis.
b. For any given calendar year, the Permittee shall be in compliance with the annual TP Load
limit in this Permit if:
i. the Permittee's annual TP discharge is less than or equal to its TP Load limit,or
Page 7 of 14
Permit NC0026433
ii. the Permittee is a co-permittee member of a TP compliance association.
c. If the Permittee is not a co-permittee member of a TP compliance association and the
Permittee's cumulative annual TP discharge exceeds the effective TP Load limit in this permit
at any point during the calendar year, the Permittee is in violation of its TP Load limit,and
each day of a continuing violation shall constitute a separate violation.
d. The TP Load limit in this Permit(if any) may be modified as the result of allowable changes
in the Permittee's TP allocation.
i. Allowable changes include those resulting from purchase of TP allocation from
approved mitigation banks;purchase,sale, trade,or lease of allocation between the
Permittee and other dischargers;regionalization;and other transactions approved
by the Division.
ii. The Permittee may request a modification of the TP Load limit in this Permit to
reflect allowable changes in its TP allocation. Upon receipt of timely and proper
application, the Division will modify the permit as appropriate and in accordance
with state and federal program requirements.
iii. Changes in TP Load Limits become effective on January 1 of the year following
permit modification. The Division must receive application no later than August 31
for changes proposed for the following calendar year.
iv. Application shall be sent to:
NCDWR/ NPDES Programs
Attn: Neuse River Basin Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
e. If the Permittee is a member and co-permittee of a TP compliance association, its TP
discharge during that year is governed by that association's group NPDES permit and the TP
limits therein.
i. The Permittee shall be considered a Co-Permittee Member for any given calendar
year in which it is identified as such in Appendix A of the association's group
NPDES permit.
ii. Association roster(s) and members'TP allocations will be updated annually and in
accordance with state and federal program requirements.
iii. If the Permittee intends to join or leave a compliance association,the Division must
be notified of the proposed action in accordance with the procedures defined in the
association's NPDES permit.
(A) Upon receipt of timely and proper notification, the Division will modify the
permit as appropriate and in accordance with state and federal program
requirements.
(B) Membership changes in a compliance association become effective on
January 1 of the year following modification of the association's permit.
The TP monitoring and reporting requirements in this Permit remain in effect until expiration of this
Permit and are not affected by the Permittee's membership in a compliance association.
Page 8 of 14
Permit NC0026433
A. (6.) NUTRIENT ALLOCATIONS
[G.S. 143-215.1(b)]
a. The following table lists the Total Nitrogen(TN) and Total Phosphorus (TP) allocations
assigned to,acquired by,or transferred to the Permittee in accordance with the Neuse River
and Falls Lake nutrient management rules (T15A NCAC 02B .0234 and .0279,respectively)
and the status of each allocation, as of permit issuance.The allocations in this table are not
enforceable limits nor do they supersede any TN or TP limit(s) established elsewhere in this
permit or in the NPDES permit of a compliance association of which the Permittee is a Co-
Permittee Member.
b. Total Nitrogen(TN) Allocation-Neuse River Estuary
ALLOCATION _ TN ALLOCATION 1
TYPE SOURCE DATE Estuary Discharge STATUS
(Ib/yr) (Ib/yr)
Assigned by Rule 12/7/1997, 1,042 10,422 Active
Base (T15A NCAC 02B .0234) 4/1/2003
Result of Lesser Falls Lake 1/1/2016 3,981 39,805 Reserve
Allocation Stage 1
TOTAL 5,023 50,228 Mixed
Footnote:
1. Transport Factor=10%
c. Total Nitrogen(TN) Allocation- Falls Lake
ALLOCATION TN ALLOCATION 1 TP ALLOCATION 2
TYPE SOURCE DATE STATUS
(Ib/yr) (Ib/yr)
Stage I (Effective 1/1/2016— 12/31/2035)
Assigned by Rule
Base (T15A NCAC 02B 2/16/2010 10,422 1,352 Active
.0279)
TOTAL 10,422 1,352 Active
Stage II (Effective 1/1/2036)
Assigned by Rule
Base (T15A NCAC 02B 2/16/2010 10,276 572 Active
.0279)
TOTAL 10,276 572 Active
Footnote:
1. Nitrogen Transport Factor is assumed to be 100%;therefore,stated allocations represent both discharge
and delivered values.
2. Phosphorous Transport Factor is assumed to be 100%;therefore,stated allocations represent both discharge
P P P g
and delivered values.
d. Any addition, deletion, or modification of the listed allocation(s) (other than to correct
typographical errors) or any change to Active 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.
Page 9 of 14
Permit NC0026433
A. (7.) EFFLUENT POLLUTANT SCAN
[G.S. 143-215.1(b)]
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: 2021,2022, and 2023. Analytical methods
shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether
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) Trans-1,2-dichloroethylene Bis(2-chloroethyl)ether
Chlorine(total residual,TRC) 1,1-dichloroethylene Bis(2-chloroisopropyl)ether
Dissolved oxygen 1,2-dichloropropane Bis(2-ethylhexyl)phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead Acid-extractable compounds: Diethyl phthalate
Mercury(EPA Method 1631E) P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachlorobutadiene
Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base-neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene
1,1-dichloroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis(2-chloroethoxy)methane
Page 10 of 14
Permit NC0026433
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: NC DEQ/DWR/Central Files,1617 Mail Service Center,Raleigh,North
Carolina 27699-1617.
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
122.21(j)(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
1621 Mail Service Center
Raleigh,North Carolina 27699-1621
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. (8.) MERCURY MINIMIZATION PLAN (MMP)
[G.S. 143-215.1(b)]
The permittee shall continue implementing the mercury minimization plan during this permit term.
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.
A. (9.) ELECTRONIC REPORTING OF MONITORING REPORTS
[G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
program reports. The final NPDES Electronic Reporting Rule was adopted and became effective on
December 21,2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of
this permit(Standard Conditions for NPDES Permits):
Page 11 of 14
Permit NC0026433
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's
Electronic Discharge Monitoring Report (eDMR) 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
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the
facility being physically located in an area where less than 10 percent of the households have
broadband access, then a temporary waiver from the NPDES electronic reporting requirements
may be granted and discharge monitoring data may be submitted on paper DMR forms (MR 1,
1.1, 2,3) or alternative forms approved by the Director. Duplicate signed copies shall be
submitted to the mailing address above. See"How to Request a Waiver from Electronic
Reporting" section below.
Regardless of the submission method,the first DMR is due on the last day of the month
following the issuance of the permit or in the case of a new facility,on the last day of the month
following the commencement of discharge.
Starting on December 21,2020, the permittee must electronically report the following
compliance monitoring data and reports,when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act(CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request
a Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the
time of each electronic submission. The permittee should use the EPA's website resources to
identify the initial recipient for the electronic submission.
Page 12 of 14
Permit NC0026433
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the
entity (EPA or the state authorized by EPA to implement the NPDES program) that is the
designated entity for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool
for each type of electronic submission and for each state. Instructions on how to access and use
the appropriate electronic reporting tool will be available as well. Information on EPA's
NPDES Electronic Reporting Rule is found at:
https://www.federalregister.gov/documents/2015/10/22/2015-24954/national-pollutant-
discharge-elimination-system-npdes-electronic-reporting-rule
Electronic submissions must start by the dates listed in the"Reporting Requirements" section
above.
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain
an electronic reporting waiver,a permittee must first submit an electronic reporting waiver
request to the Division. Requests for temporary electronic reporting waivers must be
submitted in writing to the Division for written approval at least sixty (60) days prior to the
date the facility would be required under this permit to begin submitting monitoring data and
reports. The duration of a temporary waiver shall not exceed 5 years and shall thereupon
expire. At such time,monitoring data and reports shall be submitted electronically to the
Division unless the permittee re-applies for and is granted a new temporary electronic
reporting waiver by the Division. Approved electronic reporting waivers are not transferrable.
Only permittees with an approved reporting waiver request may submit monitoring data and
reports on paper to the Division for the period that the approved reporting waiver request is
effective.
Information on eDMR and the application for a temporary electronic reporting waiver are
found on the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.)
(d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in
Part II,Section B. (11.)(a) or by a duly authorized representative of that person as described in
Part 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
Page 13 of 14
Permit NC0026433
Certification. Any person submitting an electronic DMR using the states 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 belief true,accurate,and complete.I am aware that there
are significant penalties for submitting false information, including the possibility of fines and
imprisonment for knowing violations."
5. Records Retention [Supplements Section D.(6.)]
The permittee shall retain records of all Discharge Monitoring Reports,including eDMR
submissions. These records or copies shall be maintained for a period of at least 3 years from the
date of the report. This period may be extended by request of the Director at any time [40 CFR
122.41]
Page 14 of 14
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Subbasin: 03-04-01 HUC: 03020201 Hillsborough WWTP NC0026433
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