NC0026441_Draft Permit_20190228

I
DRAFT PERMIT
Town of Siler City
is hereby authorized to discharge wastewater from a facility located at the
This permit shall become effective ..
This permit and authorization to discharge shall expire at midnight February 28, 2019.
Signed this day.
DRAFT
to receiving waters designated as Loves Creek within the Cape Fear River Basin, in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV
hereof.
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
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
Town of Siler City WWTP
370 Wastewater Plant Road
Chatham County
Thomas A. Reeder, Director
Division of Water Resources
By Authority of the Environmental Management Commission
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
(NPDES)
Permit NC0026441
SUPPLEMENT TO PERMIT COVER SHEET
The Town of Siler City is hereby authorized to:
1.
This facility is located at the Siler City WWTP on Wastewater Plant Road near Siler City in Chatham County.
Page 2 of 8
Continue discharging 4.0 MGD of treated process-contact and domestic wastewater from a treatment
facility consisting of
• Automatic and manual bar screens
• Grit collection unit
• Influent pump station
• Influent Equalization Basin (Zone 2)
• Dual oxidation ditches with surface jet aeration
• Flow Splitter Box
o Alum feed station
o Lime feed station
• Dual secondary clarifiers
• Dual Aerobic digesters
• Return Activated Sludge
• Sludge Transfer Station
• Dissolved Air Flotation Unit (Used as needed)
• Sludge Thickener Basin
• Influent equalization or Sludge Storage Basins (Zone 3 A & B used as needed)
• Four (4) tertiary filters
• Filter Backwash Basin
• Gaseous Chlorine Disinfection
• Chlorine contact chamber
• Gaseous Sulfur dioxide Dechlorination
• Step-Aeration
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.
2. Discharge from said wastewater treatment works through Outfall 001 into Loves Creek (see attached map), a
stream classified as C waters within the Cape Fear River Basin.
Permit NC0026441
Part I
A. (1)EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
PARAMETERS
Flow 4.0 MGD Continuous Recording
5.0 mg/L 7.5 mg/L Daily Composite
10.0 mg/L 15.0 mg/L Daily Composite
30.0 mg/L 45.0 mg/L Daily Composite
1.0 mg/L 3.0 mg/L Daily Composite Effluent
2.0 mg/L 6.0 mg/L Daily Composite Effluent
I 200/ 100 ml 400 / 100 ml Daily Grab Effluent
17 pg/L
Weekly Calculated Effluent
0.5 mg/L (quarterly average)Weekly Composite Effluent
2.0 mg/L (quarterly average)Weekly Composite Effluent
2.1 pg/L 15.5 pg/'L
Monitor and Report Effluent
1.
4.
Page 3 of 8
Weekly
Weekly
Composite
Composite
Effluent
Effluent
2.
3.
5.
6.
Weekly
Average
Daily
Maximum
Sample
Type
7.
8.
Daily average > 6.0 mg/L
> 6.0 and < 9.0 standard units
Daily
Daily
Daily
Daily
Composite
Composite
Composite
Composite
Composite
Footnote 9
Grab
Grab
Grab
Grab
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
Effluent
MONITORING REQUIREMENTS
Measurement
Frequency
Monthly
Quarterly 7
Quarterly 7
Quarterly 7
Quarterly
Footnote 9
Sample
Location 7
Influent or
Effluent
Influent and
Effluent
Influent and
Effluent
Influent and
Effluent
a. During the period beginning with the effective date and lasting until expiration, the Permittee is authorized to discharge
treated wastewater through Outfall 001 Such discharges shall be limited and monitored 1 by the Permittee as specified below:
_______EFFLUENT LIMITS
Monthly
Average
BOD, 5 day, 20°C 3
(April 1 thru October 31)______
BOD, 5 day, 20°C3
(November 1 thru March 31)
Total Suspended Solids 3
NH3 as N
(April 1 thru October 31)______
NH3 as N
(November 1 thru March 31)
Fecal Coliform
(geometric mean)____________
Total Residual Chlorine (TRC)4
Temperature (°C)
Dissolved Oxygen
PH
Total Nitrogen
(NO2 + NO3 + TKN)_________
NO3-N + NO2-N (mg/L)
TKN (mg/L) ____________
Total Phosphorus 5
(April 1 thru September 30)
Total Phosphorus 5
(October 1 through March 31)
Total Cadmium 6
Total Copper
Total Zinc
Chloride
Chronic Toxicity 8
Effluent Pollutant Scan
Footnotes:
No later than 270 days from the effective date of this permit, begin submitting discharge monitoring reports electronically
using NC DWR’s eDMR application system. See Condition A. (7).
Instream monitoring shall be performed in accordance with A. (2).
The monthly average effluent BODS and Total Suspended Solids concentrations shall not exceed 15 % of the respective
influent value (i.e., 85% removal is required).
The Permittee shall report all effluent TRC values reported by a NC-certified laboratory [including field-certified].
Effluent values below 50 pg/L will be treated as zero for compliance purposes.
Compliance with the Total Phosphorus limits shall be based on a calendar-quarter average of weekly samples.
Cadmium limits become effective 18 months after the effective date of this permit. Monitoring shall begin on the
effective date. See Condition A. (6).
Sample Quarterly in conjunction with Chronic Toxicity Test.
Chronic Toxicity (Ccriodaphnia) at 90 %; quarterly during March, June, September, December [see Condition A. (8)].
r •
Permit NC0026441
Footnotes A.(l) Continued:
9.The permittee shall perform three Effluent Pollutant Scans during the term of this permit [see Condition A. (9)].
b. Effluent shall contain no floating solids or foam visible in other than trace amounts.
A. (2)INSTREAM MONITORING REQUIREMENTS
Sample Type Location 1Parameter
Dissolved Oxygen Grab LCU, LCD, RRU, RRD
Grab
1.
2.
A. (3)NUTRIENT REOPENER
A. (4)NUTRIENT WATER QUALITY MODELING REOPENER
Page 4 of 8
Pursuant to N.C. General Statutes Section 143-215.1 and the implementing rules found in the North Carolina
Administrative Code at 15A NCAC 2H.0112 (b) (1) and 2H.0114 (a) and Part II sections B-12 and B-13 of this
permit, the Director of DWR may reopen this permit to require supplemental nutrient monitoring of the discharge.
The purpose of the additional monitoring will be to support water quality modeling efforts within the Cape Fear
River Basin and shall be consistent with a monitoring plan developed jointly by the Division and affected
stakeholders. In addition, the results of water quality modeling may require that limits for total nitrogen and total
phosphorus be imposed or modified in this permit upon renewal.
Pursuant to N.C. General Statute Section 143-215.1 and the implementing rules found in Title 15A of the North
Carolina Administrative Code, Subchapter 2H, specifically, 15A NCAC 2H.0112(b) (1) and 2H.0114(a), and Part
II, Sections B-12 and B-13 of this pennit, the Director of DWR may then reopen this permit to require
supplemental nutrient limits for Total Nitrogen and Total Phosphorus in accordance with the current Basin Plan for
the Cape Fear River Basin.
Grab
Grab
Grab
LCU, LCD, RRU, RRD
LCU, LCD, RRU, RRD
LCU, LCD, RRU, RRD
LCU, LCD, RRU, RRD
Temperature
Total Phosphorus
TKN
NO3-N + no2-n
In the event that Permittee proposes to accept future Industrial wastewater that has the possibility to increase the
Total Nitrogen Load and/ or Total Phosphorus load discharged above the 2012-2013 average nutrient loads, the
Permittee shall notify the NPDES Complex Permitting Unit of the Division at 1617 Mail Service Center. Raleigh,
NC 27699 and the Raleigh Regional Office at 3800 Barrett Drive, Raleigh, NC 27609 at least 180 days prior to the
start of the proposed discharge. The notification shall contain information regarding the proposed discharge flow,
composition and treatability in the Siler City W WTP.
Footnotes:
LCU - Loves Creek, upstream of the discharge; LCD - Loves Creek, downstream of the discharge and above the
confluence with the Rocky River; RRU - Rocky River, upstream of the confluence with Loves Creek; RRD - Rocky
River, downstream of the confluence with Loves Creek.
All monitoring is required to be performed at the above-mentioned monitoring locations. Instream Monitoring
may be perfonned by the Upper Cape Fear River Basin Association as outlined in the Memorandum of Agreement
(MOA) between the association and the permittee. If so, the data is to be collected and submitted to DWR in
accordance to the terms of the MOA. Should membership in this association terminate for any reason, the permittee
shall immediately notify the Division’s NPDES Unit in writing and resume responsibility to monitor and report the
above parameters as specified in this permit.
Measurement Frequency2
3/Week (June - September),
1/Week (October-May)
3/Week (June - September),
1/Week (October-May)
Monthly
Monthly
Monthly
Permit NC0026441
A. (5)MERCURY MINIMIZATION PLAN (MMP)
on
A. (6)COMPLIANCE SCHEDULE FOR CADMIUM LIMITS
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• Section B. (11.)
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Signatory Requirements
Reporting
Records Retention
Monitoring Reports
The permittee shall develop and implement a mercury minimization plan (MMP) 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 MMP was developed through a stakeholder review process and has been placed (
the Division website for guidance (http://portal.ncdenr.org/web/wq/swp/ps/npdes, 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.
NC DENR / DWR / Information Processing Unit
ATTENTION: Central Files / eDMR
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Monitoring results obtained during the previous month(s) shall be summarized for each month and submitted
electronically using eDMR. The cDMR 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:
Enforcement of Cadmium limits shall begin 18 months after the effective date of this permit. Monitoring shall
begin on the effective date. If 12 monthly data points are all less than 2.1 pg/ L, Permittee may petition the
Division for removal of Cadmium limits and monitoring from the permit. Monitoring will remain on the LTMP.
This limit removal will not be considered a permit modification requiring public notice.
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
NOTE: This special condition supplements or supersedes the following sections within Part II of this permit
{Standard Conditions for NPDES Permits'):
A. (7) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
Proposed federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and specify
that, if a state does not establish a system to receive such submittals, then permittees must submit DMRs
electronically to the Environmental Protection Agency (EPA). The Division anticipates that these regulations will
be adopted and is beginning implementation in late 2013.
1. Reporting (Supersedes Section D. (2.) and Section E. (5.) (a)|
Beginning no later than 270 days from the effective date of this permit, the permittee shall begin reporting
discharge monitoring data electronically using the NC DWR’s Electronic Discharge Monitoring Report
(eDMR) internet application.
Permit NC0026441
http://portal.ncdenr.oig/web/wq/adiniii/bog/ipu/edmr
Page 6 of 8
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:
Regardless of the submission method, the first DMR is due on the last day of the month following the issuance
of the pennit or in the case of a new facility, on the last day of the month following the commencement of
discharge.
http://portal.ncdenr.org/web/wq/admin/bog/ipu/edmr
2. Signatory Requirements [Supplements Section B. (11.) (b) and supersedes Section B. (11.) (d)]
All cDMRs submitted to the permit issuing authority shall be signed by a person described in Part II, Section
B. (1 l.)(a) or by a duly authorized representative of that person as described in Part II, Section B. (1 1 ,)(b). A
person, and not a position, must be delegated signatory authority for eDMR reporting purposes.
3. 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].
"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. lam aware that there are significant penalties for
submitting false information, including the possibility offines and imprisonment for knowing violations."
Information on eDMR and application for a temporary waiver from the NPDES electronic reporting
requirements is found on the following web page:
Requests for temporary waivers from the NPDES electronic reporting requirements 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 using eDMR. Temporary waivers shall be valid for twelve (12) months and
shall thereupon expire. At such time, DMRs shall be submitted electronically to the Division unless the
permittee re-applies for and is granted a new temporary waiver by the Division.
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 infonnation on North Carolina’s eDMR system,
registering for eDMR and obtaining an eDMR user account, please visit the following web page:
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.
9 .
Permit NC0026441
A. (8)
Attention:
Page 7 of 8
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.
If the Permittee monitors any pollutant more frequently than required by this permit, the results of such monitoring shall be
included in the calculation & reporting of the data submitted on the DMR & all AT Form submitted.
North Carolina Division of Water Resources
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
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 fu st day of the month in which toxicity testing is required by this pennit and continues until the final
day of the third month.
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.
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:
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 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.
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.
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.
CHRONIC TOXICITY PERMIT LIMIT (Quarterly)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to at an effluent
concentration of 90%.
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.
Permit NC0026441
EFFLUENT POLLUTANT SCAN
Reporting. Test results shall be reported on DWR Form-A MR-PPA1 (or in a form approved by the Director) by
Page 8 of 8
1
December 31st of each designated sampling year. The report shall be submitted to the following address: NC
DENR / DWR / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) 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-octyl phthalate
Dibenzo(a,h)anthracene
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
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
lndeno(l ,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-n itrosod imethylam ine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1.2.4- trichlorobenzene
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 163IE)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile oi^anic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorod ibromomethane
Chlorocthanc
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1.1- dichloroethane
1.2- dichloroethane
A. (9)
The Permittee shall perforin a total of three (3) Effluent Pollutant Scans for all parameters listed below. One scan
must be performed in each of the following years: 2016, 2017, and 2018. 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.”
Trans-1,2-dichloroethylene
1.1- dichloroethylene
1.2- dichloropropane
1.3- dichloropropylene
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
Acid-extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2.4- dichlorophenol
2.4- dimethylphenol
4.6- dinitro-o-cresol
2.4- dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2.4.6- trichlorophenol
Base-neutral cotnpoun ds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Bcnzo(a)anthraccnc
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane