NC0074306_Draft Permit_20181031

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NORTH CAROLINA
Environmental Quality
ROY COOPER
Governor
MICHAEL S.REGAN
Secretary
LINDA CULPEPPER
Interim Director
October 31, 2018
Mr. John Condrey, City Manager
Town of Forest City
PO Box 728
Forest City,NC 28043-0728
Subject: Draft NPDES Permit NC0074306
Forest City WTP
Grade I Physical Chemical WPCS
Rutherford County
Dear Mr. Condrey:
The Division has reviewed your request to renew the subject permit. Please review this draft carefully
to ensure your thorough understanding of the information, conditions, and requirements it contains.
The draft permit includes the following significant changes from the existing permit:
1. Language has been added in Section A. (1) and as Section A. (3)to require electronic submission
of effluent data. Federal regulations require electronic submittal of all discharge monitoring
reports (DMRs).
2. Regulatory citations have been added to the permit.
3. Outfall map has been updated.
4. The components list has been added on the Supplement to Permit Cover Sheet.
5. Language has been updated on the Supplement to Permit Cover Sheet.
6. Units of measure have been added in Section A. (1).
7. The facility grade has been added in Section A. (1).
8. Monitoring for turbidity has been changed to monthly in Section A. (1)per the current water
treatment plant guidance.
9. Monitoring for iron in Section A. (1)has been removed per the renewal application and current
water treatment plant guidance.
EQ�
North Carolina Department of Environmental Quality I Division of Water Resources
512 North Salisbury Street I 1617 Mail Service Center I Raleigh,North Carolina 27699-1617
919.707.9000

Permit NC0074306
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
NPDES
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 Forest City
is hereby authorized to discharge wastewater from a facility located at the
Forest City WTP
581 Vance Street
Forest City
Rutherford County
to receiving waters designated as an unnamed tributary to the Second Broad River in the Broad River
Basin in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, II, III and N hereof.
_This permit shall become effective.
This permit and authorization to discharge shall expire at midnight on July 31, 2023.
Signed this day.
Linda Culpepper
Interim Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 8

Permit NC0074306
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
Grade I Physical Chemical WPCS [15A NCAC 08G .0302]
During the period beginning on the effective date of this permit and lasting until expiration, the
Permittee is authorized to discharge filter backwash from outfall 001. Such discharges shall be limited
and monitored) by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITATIONS MONITORING REQUIREMENTS
Parameter Code Monthly Daily Measurement Sample Type Sample
Average . Maximum Frequency Location
Flow(MGD) 50050 2/Month Instantaneous 2 Effluent
TSS C0530 30 mg/L 45 mg/L 2/Month Grab Effluent
pH 00400 Not<6.0 nor>9.0 s.u. 2/Month Grab Effluent
Total Residual Chlorine 3 50060 17 pg/L 2/Month Grab Effluent
Turbidity(NTU) 00070 Monthly Grab Effluent
Aluminum(pg/L) 01105 Quarterly Grab Effluent
Total Copper(pg/L) 01042 Quarterly Grab Effluent
Manganese(pg/L) 01055 Quarterly Grab Effluent
Total Fluoride(pg/L) 00951 Quarterly Grab Effluent
Total Zinc(pg/L) 01092 Quarterly Grab Effluent
Total Nitrogen C0600 Quarterly Grab Effluent
Total Phosphorus C0665 Quarterly Grab Effluent
Hardness—Total as 00900 Quarterly Grab Effluent
[CaCO3 or(Ca+Mg)]4(mg/L)
Hardness—Total as 00900 Quarterly Grab Upstream
[CaCO3 or(Ca+Mg)]5(mg/L)
Whole Effluent Toxicity 6 TGA3B Monitor&Report Quarterly Grab Effluent
Footnotes:
I. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR
application system [see Section A. (3)].
2. Duration of discharge should be noted in log books and a Total daily discharge reported in the DMR.
3. 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 µg/L.
4. Effluent hardness sampling should be performed in conjunction with testing for hardness dependent metals
(cadmium, copper, lead,nickel, silver, and zinc).
5. 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
Page 3 of 8

Permit NC0074306
A. (2) ACUTE TOXICITY PASS/FAIL MONITORING(QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the North
Carolina Procedure Document entitled"Pass/Fail Methodology For Determining Acute Toxicity In A
Single Effluent Concentration" (Revised December 2010 or subsequent versions). The monitoring shall
be performed as a Ceriodaphnia dubia 48 hour static test. The effluent concentration at which there may
be at no time significant acute mortality is 90% (defined as treatment two in the procedure document).
Effluent samples for self-monitoring purposes must be obtained during representative effluent discharge
below all waste treatment. The tests will be performed during the months of January, April,July, and
October. These months signify the first month of each three month toxicity testing quarter assigned to
the facility.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form(MR-1) for the month in which it was performed,using the parameter code
TGA3B. Additionally, DWQ Form AT-2 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Quality
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 and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. 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, then
monthly monitoring will begin immediately. Upon submission of a valid test, this monthly test
requirement will revert to quarterly in the months specified above. 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 either these monitoring requirements or tests performed by the North Carolina
Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re-
opened and modified to include alternate monitoring requirements or limits.
Page 5of8

Permit NC0074306
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.
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
Page 7 of 8

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Forest City WTP N i�1� i#����41.44,,,iiiss,NPDES Permit NC0074306A A���`�!`��'���i �I
Facility Location inb:7iar'a1�
Receiving Stream: UT to Second Broad River Stream Class:WS-V scale not shown ��Ilk
Stream Segment:9-41-(12.7) Sub-Basin#:03-08-02 VA
River Basin: Broad HUC:0305010504 SCALE USGS Quad:Forest City
County: Rutherford 1:24,000 35.34889°,-81.86472°