NC0020354_Approval_19980925

GF
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
September 25, 1998
CERTIFIED MAIL
NCDENR RETURN RECEIPT REQUESTED
Mr. Ken Cornatzer
JAMES 13. HUNT JR. Town Manager
GOVERNOR Town of Pittsboro
PO Box 759
Pittsboro, NC 27312
WAYNE MCDEVITT Subject: Final Approval of Pretreatment Program
SECRETARY - -
A. PRESTON HOWARD,
Dear Mr. Cornatzer:
JR., P.E.
DIRECTOR
DIVISION OF WATER QUALITY
The Division of Water Quality has received your August 4, 1997, request to modify your
NPDES permit to allow for development of a Pretreatment Program. The Town of Pittsboro
has successfully completed the required activities established by the Division's Pretreatment
Unit for the development of a Division of Water Quality approved pretreatment program.
With consideration of the successful completion of the required activities and the public
comments received on the delegation request, the Pretreatment Program for the Town of
Pittsboro is approved as of September 25, 1998.
The Town of Pittsboro's NPDES permit will be the Division of Water Quality's (DWQ)
primary instrument for Pretreatment Program enforcement. Therefore, we are forwarding
herewith modifications to Town of Pittsboro's Wastewater Treatment Plant NPDES permit
NC0020354. This modification changes the discharge limitation on ammonia (Part I, A.(1)
and A.(2)) and adds a toxicity limit and monitoring requirement (Part I, A.(3)), as well as
providing the appropriate permit text (Part III, A. and B.) for a facility with a Pretreatment
Program. These pages must be inserted into the NPDES permit. The old pages may then be
discarded. All other terms and conditions contained in the original permit remain unchanged
and in full effect. This permit modification is issued pursuant to the requirements of North
Carolina General Statute 143-215.1 and the Memorandum of Agreement between North
Carolina and the US Environmental Protection Agency. The Division of Water Quality
(DWQ) will retain the authority to require changes in your local pretreatment program, as
appropriate.
If any part of the modification is 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 be filed with the Office of Administrative Hearings, Post Office Drawer
27447, Raleigh, North Carolina 27611-7447. Unless such demand is made, this modification
shall be final and binding.
This NPDES permit modification does not affect the legal requirements to obtain other permits
which may be required by the Division or any other Federal, State or Local Agency.
P.O. BOX 29535, RALEIGH, NORTH CAROLINA 27626-0535
PHONE [phone] FAX [phone]
AN EQUAL OPPORTUNITY /AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% POST -CONSUMER PAPER

RECD BY CONFIRRAL RM

Mr. Cornatzer
Page 2
Please note the due dates below for specific submittals to the Division's Pretreatment Unit regarding
implementation of Part III, B., of the NPDES modification and your Pretreatment Program. Examples,
descriptions, and acronyms of the following items are in the Comprehensive Guidance for North Carolina
Pretreatment Programs (Comprehensive Guide). Technical assistance is available from DWQ upon request.
Submissions must be made in writing and received by DWQ by the listed date. Failure to meet any due date may
result in an NPDES permit condition violation and possible subsequent enforcement action by the Division.
1. September 30, 1998: Inspect Hydro Tube South and submit a completed Industrial User
Inspection form. (Comprehensive Guide, Ch. 7)
2. September 30,1998: Issue Division approved Industrial User Pretreatment Permit (IUP) to
Hydro Tube South with an expiration date of June 30, 2002 or earlier. (Comprehensive Guide,
Ch. 6)
3. September 30,1998: Submit a summary of Industrial Waste Survey (IWS) (Comprehensive
Guide, Ch. 3). Provide information on industries as discussed during the meeting:
4. September 30, 1998: Submit a revised Enforcement Response Plan (ERP) addressing the
Division's concerns as outlined in our July 28, 1998, letter (Comprehensive Guide, Ch. 8).
5. October 14, 1998: Attend meeting to conduct new Headworks Analysis (HWA) based on
monitoring data to the Division (Comprehensive Guide, Ch. 5). Bring all available STMT and
SIU data in computer spreadsheet format.
6. March 1,1999: Report on compliance status of all Significant Industrial Users (SIUs) due to
the Division for the reporting "period of July 1, 1998 through December 31, 1998
(Comprehensive Guide, Ch. 9).
We look forward to working with the Town of Pittsboro in its role as a local control authority of the pretreatment
program. Should the Town require assistance or information regarding the modification or implementation of
its pretreatment program, then please feel free to call Dana Folley of the Division's Central Office Pretreatment
Staff at [phone] extension 523, or Danny Smith of the Raleigh Regional Office at [phone]
extension 236.
Sincerely,
�resowarJR,E.
DRF/pittsboronpdes.001.fmal.approval
enclosure 1- NPDES permit Part III
enclosure 2 — July 28, 1998, ERP Review letter
cc with enclosure I and 2:
Mr. John Poteat, Superintendent, Town of Pittsboro
DRF, Pretreatment Unit
cc with enclosure 1:
Judy Garrett and Danny Smith, Raleigh Regional Office
CCentral�Files.?
NPDES Unit
Mr. Roosevelt Childress, EPA _ -

RECD BY U-:11MRAL FILM`
SEP 28 98

A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - SUMMER (April 1 - October 31) Permit No. NCO020354
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:
EFFLUENT ':CHARACTERISTICS
Monthly
Average
LIMITS
Weekly
Average
MONITORING REQUIREMENTS
Daily Measurement Sample Sample
Maximum Frequency Type Locations
Flow
0.75 MGD
Continuous
Recording
I or E
BOD, 5 day, 20°C2
5.0 mg/1
7.5 mg/1
3/Week
Composite
E, I
Total Suspended Residue2
30.0 mg/1
45.0 mg/1
3/Week
Composite
E, I
NH3 as N
2.0 mg/I
3/Week
Composite
E
Dissolved Oxygen3
3/Week
Grab
E, U, D
Fecal Coliform(geometric mean
200 /100 ml
400 /100 ml
3/Week
Grab
E, U, D
Total Residual Chlorine
3/Week
Grab
E
Temperature
Daily
Grab
E, U, D
Total Nitrogen (NO2 + NO3 +TKN)
Quarterly
Composite
E
Total Phosphorus
2.0 mg/1
Weekly
Composite
E
Conductivity
3/Week
Grab
U, D
Chronic Toxicit 4
Quarterly
Grab
E
Footnotes:
1 Sample locations: E - Effluent; I - Influent; U - Upstream at Highway 70 Bypass bridge; D - Downstream at Highway 70-A bridge.
2 The monthly average BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85% removal).
3 The daily dissolved oxygen effluent concentration shall not be less than 6.0 mg/l.
4 Chronic Toxicity (Ceriodaphnia) P/F at 90%; March, June, September & December (see Condition A.(3.)).
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored three times per
week at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A.(2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - WINTER (November 1 - March 31) Permit No. NCO020354
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 b6low:
EFFLUENT,, CHARACTERISTICS
Monthly,
Average
LIMITS
Weekly
Average
MONITORING REQUIREMENTS
Daily Measurement Sample Sample
Maximum Frequency Type Locationl
Flow
0.75 MGD
Continuous
Recording
I or E
BOD, 5 day, 20°C2
10.0 mg/1
15.0 mg/1
3/Week
Composite
E, I
Total Suspended Residue2
30.0 mg/1
45.0 mg/1
3/Week
Composite
E, I
NH3 as N
2.0 mg/1
3/Week
Composite
E
Dissolved Oxyqen3
3/Week
Grab
E, U, D
Fecal Coliform(geometric mean
200 /100 ml
400 /100 ml
3/Week
Grab
E, U, D
Total Residual Chlorine
3/Week
Grab
E
Temperature
Daily
Grab
E, U, D
Total Nitrogen (NO2 + NO3 + TKN)
Quarterly
Composite
E
Total Phosphorus
2.0 mg/1
Weekly
Composite
E
Conductivit
3/Week
Grab
U, D
Chronic Toxicity,4
Quarterly I
Grab
E
Footnotes:
1 Sample locations: E - Effluent; I - Influent; U - Upstream at Highway 70 Bypass bridge; D - Downstream at Highway 70-A bridge.
2 The monthly average BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85% removal).
3 The daily dissolved oxygen effluent concentration shall not be less than 6.0 mg/l.
4 Chronic Toxicity (Ceriodaphnia) P/F at 90%; March, June, September & December (see Condition A.(3.)).
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored three times per
week at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

FIFCD By COMIAL FLO!�,
SEP 28 98

Part I
A.(3.) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (Quarterly)
Permit No. NC0020354
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised November 1995, or
subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is 90% (defined as treatment two in the procedure document). The permit holder
shall perform quarterly monitoring using this procedure to establish compliance with the permit s
condition. The tests will be performed during the months of March, June, September and
December. Effluent sampling for this testing shall be performed at the NPDES permitted final
effluent discharge below all treatment processes.
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 TGP3B. Additionally, DWQ Form AT -1 (original) is to be sent to the following address:
Environmental Sciences Branch
North Carolina Division of Water Quality
4401 Reedy Creek Road
Raleigh, North Carolina 27607
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 Branch at the address cited above.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly
monitoring will begin immediately until such time that a single test is passed. Upon passing, this
monthly test requirement will revert to quarterly in the months specified above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then
monthly monitoring will begin immediately until such time that a single test is passed. Upon passing,
this monthly test requirement will revert to quarterly in the months specified above.
Should any test data from this monitoring requirement 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.
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.
QCL PIF Version 9196

RSCD Eff F"U

PART III
OTHER REQUIREMENTS
A. Requirements for Control of Pollutants Attribute to Industrial Users.
Effluent limitations are listed in Part I of this permit. Other pollutants attributable to inputs
from industries using the municipal system may be present in the permittee's discharge. At
such time as sufficient information becomes available to establish limitations for such
pollutants, this permit may be revised to specify effluent limitations for any or all of such -
other pollutants in accordance with best practicable technology or water quality standards.
2. Under no circumstances shall the permittee allow introduction of the following wastes in the
waste treatment system: „
a.- Pollutants which create a fire or explosion hazard in the POTW, including, but not limited to,
wastestreams with a closed cup flashpoint of less than 140 degrees Fahrenheit or 60 degrees
Centigrade using the test methods specified in 40 CFR 261.21;
b. Pollutants which will cause corrosive structural damage to the POTW, but in no case
Discharges with pH lower than 5.0, unless the works is specifically designed to accommodate
such Discharges;
C. Solid or viscous pollutants in amounts which will cause obstruction to the flow in the POTW
resulting in Interference;
d. Any pollutant, including oxygen demanding pollutants (BOD, etc.) released in a Discharge at
a flow rate and/or pollutant concentration which will cause Interference with the POTW;
e. Heat in amounts which will inhibit biological activity in the POTW resulting in Interference,
but in no case heat in such quantities that the temperature at the POTW Treatment Plant
exceeds 40°C (104°F) unless the Division, upon request of the POTW, approves alternate
temperature limits;
f. Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin in amounts that
will cause interference or pass through;
g. Pollutants which result in the presence of toxic gases, vapors, or fumes within the POTW in a
quantity that may cause acute worker health and safety problems;
h. Any trucked or hauled pollutants, except at discharge points designated by the POTW.
3. With regard to the effluent requirements listed in Part I of this permit, it may be necessary for
the permittee to supplement the requirements of the Federal Pretreatment Standards (40 CFR,
Part 403) to ensure compliance by the permittee with all applicable effluent limitations. Such
actions by the permittee may be necessary regarding some or all of the industries discharging
to the municipal system.
4. The permittee shall require any industrial discharges into the permitted system to meet Federal
_ - _ _ Pretreatment Standards, promulgated in response to .Section 307(b) of the Act. Prior to
accepting wastewater from any significant industrial user, the permittee shall either develop
and submit to the Division a Pretreatment Program for approval per 15A NCAC 2H .0907(a) or
modify an existing Pretreatment Program per 15A NCAC 2H .0907(b).
5. This permit shall be modified, or alternatively, revoked and reissued, to incorporate or modify
an approved POTW Pretreatment Program or to include a compliance schedule for the
development of a POTW Pretreatment Program as required under Section 402(b)(8) of the
Clean Water Act and implementing regulations or by the requirements of the approved State
pretreatment program, as appropriate.
B. Pretreatment Program Requirements
Under authority of sections 307(b) and (c) and 402(b)(8) of the Clean Water Act and implementing
regulations 40 CFR Part 403, North Carolina. General Statute 143-215.3 (14) and implementing
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regulations 15A NCAC 2H .0900, and in accordance with the approved pretreatment program, all
provisions and regulations contained and referenced in the Pretreatment Program Submittal are an
enforceable part of this permit.
The permittee shall operate its approved pretreatment program in accordance with Section 402(b)(8)
of the Clean Water Act, the Federal Pretreatment Regulations 40 CFR Part 403, the State Pretreatment
Regulations 15A NCAC 2H .0900, and the legal authorities, policies, procedures, and financial
provisions contained in its pretreatment program submission and Division approved modifications
there of. Such operation shall include but is not limited to the implementation of the following
conditions and requirements:
Sewer Use Ordinance (SUO)
The permittee shall maintain adequate legal authority to implement its approved pretreatment
program;
2. Industrial Waste Survey (IWS)
The permittee shall update its Industrial Waste Survey (IWS) of all users of the sewer collection
system at least once every five years;
3. Monitoring Plan
The permittee shall implement a Division approved Monitoring Plan for the collection of
facility specific data to be used in a wastewater treatment plant Headworks Analysis (HWA)
for the development of specific pretreatment local limits;
Headworks Analysis (HWA) and Local Limits
The permittee shall obtain Division approval of a Headworks Analysis (HWA) at least once
every five years, and as required by the Division. The permittee shall develop, in accordance
with 40 CFR 403.5(c) and 15A NCAC 2H .0909, specific Local Limits to implement the
prohibitions listed in 40 CFR 403.5(a) and (b) and 15A NCAC 2H .0909;
5. Industrial User Pretreatment Permits (IUP) & Allocation Tables
In accordance with NCGS 143-215.1, the permittee shall issue to all significant industrial users,
permits for operation of pretreatment equipment and discharge to the permittee's treatment
works. These permits shall contain limitations, sampling protocols, reporting requirements,
appropriate standard and special conditions, and compliance schedules as necessary for the
installation, of treatment and control technologies to assure that their wastewater discharge will
meet all applicable pretreatment standards and requirements. The permittee shall maintain a
current Allocation Table (AT) which summarizes the results of the Headworks Analysis (HWA)
and the limits from all Industrial User Pretreatment Permits (IUP). Permitted IUP loadings for
each parameter cannot exceed the treatment capacity of the POTW as determined by the HWA;
6. Authorization to Construct (A to (f)
The permittee shall ensure that an Authorization to Construct (A to C) is issued to all
applicable industrial users for the construction or modification of any pretreatment facility.
Prior to the issuance of an Authorization to Construct (A to C), the proposed pretreatment
facility and treatment process must be evaluated for its capacity to comply with all Industrial
User Pretreatment Permit (IUP) limitations;
7. POTW Inspection & Monitoring of their SIUs
The permittee shall conduct inspection, surveillance, and monitoring activities as described in
its Division approved pretreatment program in order to determine, independent of information
supplied by industrial users, compliance with applicable, pretreatment standards. The
permittee must:
Part III Page 2 of 4

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7a. Inspect all Significant Industrial Users (SIUs) at least once per calendar year; and
7b. Sample all Significant Industrial Users (SIUs) at least twice per calendar year for all
permit -limited pollutants, once during the period from January 1 through June 30
and once during the period from July 1 through December 31, except for organic
compounds which shall be sampled once per calendar year;
8. SIU Self Monitoring and Reporting
The permittee shall require all industrial users to comply with the applicable monitoring and
reporting requirements outlined in the Division approved pretreatment program, the industry's
pretreatment permit, or in 15A NCAC 2H .0908;
9. Enforcement Response Plan (ERP)
The permittee shall enforce and obtain appropriate remedies for violations of all pretreatment
standards promulgated pursuant to section 307(b) and (c) of the Clean Water Act (40 CFR 405
et.seq.), prohibitive discharge standards as set forth in 40 CFR 403.5 and 15A NCAC 2H .09091
and specific local limitations. All enforcement actions shall be consistent with the Enforcement
Response Plan (ERP) approved by the Division;
10. Pretreatment Annual Reports (PAR)
The permittee shall report to the Division in accordance with 15A NCAC 2H .0908. In lieu of
submitting annual reports, Modified Pretreatment Programs developed under 15A NCAC 2H
.0904 (b) may be required to meet with Division personnel periodically to discuss enforcement
of pretreatment requirements and other pretreatment implementation issues.
For all other active pretreatment programs, the permittee shall submit two copies of a
Pretreatment Annual Report (PAR) describing its pretreatment activities over the previous
twelve monthsto the Division at the following address:
NC DWQ Pretreatment Group
P.O. BOX 29535
RALEIGH, NC 27626-0535
These reports shall be submitted according to a schedule established by the Director and shall
contain the following:
a.) Narrative
A brief discussion of reasons for, status of, and actions taken for all Significant
Industrial Users (SIUs) in Significant Non -Compliance (SNC);
b.) Pretreatment Program Summary (PPS)
A pretreatment program summary (PPS) on specific forms approved by the
Division;
c.) Significant Non -Compliance Report (SNCR)
The nature of the violations' and the actions taken or proposed to correct the
violations on specific forms approved by the Division;
d.) Industrial Data Summary Forms (IDSF)
Monitoring data from samples collected by both the POTW and the Significant
Industrial User (SIU). These analytical results must be reported on Industrial
Data Summary Forms (IDSF) or other specific format approved by the Division;
e.) Other Information
Copies of the POTW's allocation table, new or modified enforcement compliance
schedules, public notice of SIUs in SNC, and any other information, upon
request, which in the opinion of the Director is needed to determine compliance
with the pretreatment implementation requirements of this permit;
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11. Public Notice
The permittee shall publish annually a list of Significant Industrial Users (SIUs) that were in
Significant Non -Compliance (SNC) as defined in the permittee's Division approved Sewer Use
Ordinance with applicable pretreatment requirements and standards during the previous
twelve month period. This list shall be published within two months of the applicable twelve
month period;
12. Record Keeping
The permittee shall retain for a minimum of three years records of monitoring activities and
results, along with support information including general records, water quality records, and
records of industrial impact on the POTW;
13. Funding and Financial Report
The permittee shall maintain adequate funding and staffing levels to accomplish the objectives
of its approved pretreatment program;
14. Modification to Pretreatment Programs
Modifications to the approved pretreatment program including but not limited to local limits
modifications, POTW monitoring of their Significant Industrial Users (SIUs), and Monitoring
Plan modifications, shall be considered a permit modification and shall be governed by 15
NCAC 2H.0114 and 15A NCAC 2H.0907.
C. Construction
No construction of wastewater treatment facilities or additions to add to the plant's treatment
capacity or to change the type of process utilized at the treatment plant shall be begun until Final
Plans and Specifications have been submitted to the Division of Water Quality and written approval
and Authorization to Construct has been issued.
D. Groundwater Monitoring
The permittee shall, upon written notice from the Director of the Division of Water Quality, conduct
groundwater monitoring as may be required to determine the compliance of this NPDES permitted
facility with the current groundwater standards.
E. Publicly Owned Treatment Works
All POTWs must provide adequate notice to the Director of the following:
1. Any new introduction of pollutants into the POTW from an indirect discharger which would be
subject to section 301 or 306 of CWA if it'were directly discharging those pollutants; and -
2. Any substantial change in the volume or character of pollutants being introduced into that
POTW by a source introducing pollutants into the POTW at the time of issuance of the permit.
3. For purposes of this paragraph, adequate notice shall include information on (1) the quality and
quantity of effluent introduced into the POTW, and (2) any anticipated impact of the change on
the quantity or quality of effluent to be discharged from the POTW.
F. Requirement to Continually Evaluate Alternatives to Wastewater Discharges
The permittee shall continually evaluate all wastewater disposal alternatives and pursue the most
environmentally sound alternative of the reasonably cost effective alternatives. If the facility is in
substantial non-compliance with the terms and conditions_ of the NPDES permit or governing rules,
regulations or laws, the permittee shall submit a report in such form and detail as required by the
Division evaluating these alternatives and a plan of action within sixty (60) days of notification by the
Division.
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