NC0026051_Permit Modification_20100709

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RUE ENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Mr. Glen E. Whisler, County Engineer
Durham County
120 E Parrish Street, lst Floor
Durham, North Carolina 27701
Dear Mr. Whisler:
Division of Water Quality
Coleen H. Sullins
Director
July 9, 2010
Dee Freeman
Secretary
Subject NPDES Permit Modification
Permit NCO026051
Durham County Triangle W WTP
Durham County
Consistent with the Director's October 1, 2009, letter of intent to modify NPDES permits affected by the
Jordan Reservoir Nutrient Management Strategy rules and in consideration of public comments on the
subsequent draft permit modifications, the Division is forwarding herewith the revised NPDES permit
for the Durham County Triangle W WTP. 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 U.S. Environmental Protection Agency, dated October 15, 2007.
The Division received the County's comments on the draft permit during the initial public comment
period. We also received comments from several permittees, including the County, regarding the
standard permit conditions (Parts II, III, and IV) in the draft permits. The final permit includes the
following changes in addition to those proposed in the draft
• Nitrogen Optimization The Nitrogen Optimization condition has been deleted. The County
correctly noted that this requirement applies only to pre-BNR facilities.
• Standard Conditions. Jeff Poupart of the Point Source Branch has worked with other programs
within the Division and with EPA Region 4 staff to evaluate and address the comments received.
The final permit includes a newly revised version of the standard permit conditions. We
appreciate your patience in this matter and regret any inconvenience this delay may have caused.
Implementation of Total Phosphorus (TP) Limits. The Jordan Reservoir Wastewater Discharge
Requirements (T15A NCAC 02B .0270) established annual mass phosphorus limits for fourteen
treatment facilities, to become effective with calendar year 2010. Thus, even though the effective date of
this permit modification is August 1, 2010, the new limits became effective January 1, 2010, by rule and
apply to calendar year 2010 in its entirety.
1617 Mail Service Center, Ralegh, North Carolina 27699-1617 1�T�e
Location: 512 N. Salisbury St Raleigh, North Carolina 27604 * O Carolina
Phone: [phone] FAX: 919-807M921 Customer Service:1-877-623-6748
Internet www,ncwaterquality.org atura!!r�
An Equal Opportunity 1 Affirmative Action Employer

Mr. Glen E. Whisler, County Engineer
NPDES Permit Modification
July 9,2010
If any parts, measurement frequencies, or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty
(30) days following receipt of this letter. This request must be in the form of a written petition,
conforming to Chapter 150B of the North Carolina General Statutes, and filed with the office of
Administrative Hearings, 6714 Mail Service Center, Raleigh, North Carolina 27699-6714. Unless such a
demand is made, this permit shall be final and binding.
This permit is not transferable except after notice to the Division of Water Quality. The Division may
require modification or revocation and reissuance of the permit. This permit does not affect the legal
requirements to obtain other permits which may be required by the Division of Water Quality, the
Division of Land Resources, the Coastal Area Management Act, or any other federal or local
governmental permit.
If you have any questions concerning this permit, please contact Mike Templeton at [phone] or at
mike. [e-mail].
Sincerely,
` Coleen
10l—
Enclosure: Final permit modification, NC00260.51
Copies: Joseph R. Pearce, Utility Division Manager
Chief, NPDES and Biosolids Permits Section, Region 1V, EPA
Raleigh Regional Office, Surface Water Protection
PERCS Unit
NPDES Files
Central Files

Permit No. NCO026051
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Durham County
is hereby authorized to discharge wastewater from a facility located at the
Durham County Triangle WWTP
5926 NC Highway 55
Durham County
to receiving waters designated as Northeast Creek in the Cape Fear River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, H, III, and IV hereof.
This permit shall become effective
August 1, 2010.
This permit and authorization to discharge shall expire at midnight on ............................... Apri130, 2011.
Signed this day.............................July 9, 2010.
H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NC0026051 ,
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.
Durham County
is hereby authorized to:
1. Continue to operate an existing 12.0 MGD wastewater treatment facility located south of Durham
at the Durham County Triangle W WTP off NC Highway 55 in Durham County. The facility
includes the following treatment components:
• Mechanical fine screens
• Mechanical grit removal
• Parshall flume
• Influent pump station
• Three 5-stage BNR trains
• Four secondary clarifiers
• Five tertiary sand filters
• Ultraviolet disinfection
• Post aeration
• Sludge lagoons
• Waste and return activated sludge pumping system
• Methanol, potassium hydroxide, and sodium hypoc 7dorite storage and feed systems
• Liquid waste activated sludge storage (projected service date is the end of 2010)
• Dewatering facility (projected service date is the end of 2010)
• Truck loading for contract composting operation (projected service date is the end of 2010)
2. Discharge from said treatment works (via Outfall 001) into Northeast Creek, a Class WS-fV NSW
water in the Cape Fear River Basin, at the location specified on the attached map.

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Durham Co. Triangle WWTP - NCO026051
Facility --
Location
USGS Quad Name: SW Durham Lat.: 35052'51"
Receiving Stream: Northeast Creek Long.: 78°53'50"
Stream Class: WS-IV NSW
Subbasin: Catawba — 03-06-05
North SCALE 1: 24,000
Nth

Permit No. NCO026051
A.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning upon the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and
monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample Location'
Flow
12.0 MGD
Continuous
Recording
Influent or Effluent
Total Monthly Flow (MG)
Monitor & Report
Monthly
Recorded or
Calculated
Influent or Effluent
BOD, 5-day, (20°C) z
(April 1- October 31)
5.0 mg/L
7.5 mg/L
Daily
Composite
Influent & Effluent
BON, 5-day, (20°C) Z
(November 1-March 31)
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent & Effluent
Total Suspended Solidsz
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent & Effluent
NH3 as N
(April 1-October 31)
1.0 mg/L
3.0 mg/L
Daily
Composite
Effluent
NH3 as N
(November 1-March 31)
1.8 mg/I.
5.4 mg/L
Daily
Composite
Effluent
Fecal Coliform
(geometric mean)
200/100mL
400/100mL.
Daily
Grab
Effluent
Dissolved Oxygen
Daily
Grab
Effluent
Temperature (°C)
Daily
Grab
Effluent
pH <
Daily
Grab
Effluent
Total Residual Chlorines
17 pg/L
Daily
Grab
Effluent
Chloroforms
2/Month
Grab
Effluent
Bromodichloromethanes
1.8 pg/L
Weekly
Grab
Effluent
Dibromochloromethanes
1.3 pg/L
Weekly
Grab
Effluent
TKN
Monitor & Report (mg/L)
Weekly
Composite
Effluent
NO3-N + NO2-N
Monitor & Report (mg/L)
Weekly
Composite
Effluent
Total Nitrogen, TN
Monitor & Report (mg/L)
Weekly
Composite
Effluent
TN Load 6,1
Monitor & Report (Ib/mo)
111,207 Ib/yr (effective 1/1/2010)
Monthly
Annually
Calculated
Effluent
Total Phosphorus, TP
Monitor & Report
Weekly
Composite
Effluent
TP Load 6•'
Monitor & Report ( lb/mo)
8,432 Ib/yr (effective1/l/2010)
Monthly
Annua N
Calculated
Effluent
Total Mercury a
0.012 pg/L
Weekly
Grab
Effluent
Fluoride
1800 pg/L
Weekly
Composite
Effluent
Total Copper
Monthly
Composite
Effluent
Total Zinc
Monthly
Composite
Effluent
Chloride
Monthly
Composite
Effluent
Effluent Pollutant Scan 9
Annually
Composite/
Effluent
Chronic Toxicity 1°
Quarterly
Composite
Effluent
All footnotes are listed on the following page.

Permit No. NCO026051
Footnotes:
1. See Condition A. (2), for Instream Monitoring Requirements.
2 The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent value (85%
removal).
3. The daily effluent dissolved oxygen concentration shall not be less than 6.0 mg/L.
4. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
5. Limit and/or monitoring applies only when chlorine is added to treatment system.
6. Refer to Special Condition A.(8.), Calculation of Total Nitrogen or Total Phosphorus Loads.
7. Compliance with mass limits shall be determined in accordance with Special Condition A.(7.), Annual Limits for Total
Nitrogen or Total Phosphorus.
8. Mercury samples shall be analyzed using EPA Method 1631E.
9. See Special Condition A. (4.), Effluent Pollutant Scan.
10. Chronic Toxicity (Ceriodaphnia) at 90%; February, May, August, and November; refer to Special Condition A.(3.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A.(2) INSTREAM MONITORING REQUIREMENTS
Beginning upon the permit effective date and lasting until expiration, the Permittee shall monitor
instream conditions as specified below':
INSTREAM
CHARACTERISTICS
MONITORING REQUIREMENTS
MEASUREMENT FREQUENCY
SAMPLE TYPE
SAMPLE LOCATION
Dissolved Oxygen
3/Week (June -September)
Grab
Upstream, Dl, D2
Weekly (October -May)
Temperature
3/Week (June -September)
Grab
Upstream, Dl, D2
Weekly (October -May)
Conductivity
3/Week (June -September)
Grab
Upstream, Dl, D2
Weekly (October -May)
Fecal Colifonn
3/Week (June -September)
Grab
Upstream, DI, D2
Weekly (October -May)
pH
3/Week (June -September)
Grab
Upstream, Dl, D2
Weekly (October -May)
Total Phosphorus
Weekly (June -September) 3
Grab
Upstream, D1, D2
PO4
Weekly (June -September) 3
Grab
Upstream, Dl, D2
TKN
Weekly (June -September) 3
Grab
Upstream, Dl, D2
N% + NO3
Weekly (June -September) 3
Grab
Upstream, Dl, D2
NH3 as N
Weekly (June -September) 3
Grab
Upstream, Dl, D2
Footnotes:
1. As a participant in the Upper Cape Fear River Basin Association, the instream monitoring requirements as stated
above are waived. Should your membership in the association be terminated, you shall notify the Division
immediately and the instream monitoring requirements specified in your permit shall be reinstated.
2. Upstream = at NCSR 1102 D1= Downstream at NCSR 1100. D2 = Downstream at NCSR 1732.
3. Samples shall be collected during June -September only.

Permit No. NCO026051
A.(3.) CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 909/6.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or
subsequent versions or "North Carolina Phase H Chronic Whole Effluent Toxicity Test Procedure
(Revised -February 1998) or subsequent versions. The tests will be performed during the months of
February, May, August, and November. Effluent sampling for this testing 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 11 Chronic Whole Effluent Toxicity Test
Procedure" (Revised -February 1998) or subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the
highest concentration having no detectable impairment of reproduction or survival and the lowest
concentration that does have a detectable impairment of reproduction or survival. The definition of
"detectable impairment," collection methods, exposure regimes, and further statistical methods are
specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -
February 1998) 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:
NCDENR/ DWQ/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.
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.

Permit No. NCO026051
A.(4.) EFFLUENT POLLUTANT SCAN
The Permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the attached
table. The 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 shall represent seasonal variations. Unless otherwise indicated,
metals shall be analyzed as "total recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury*
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dirhloroethene
Trans-1,2dichloroethylene
1,1dichloroethylene
1,2-dichloropropene
1,3dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachioroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane..
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4dichlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-duutrophenol
2-mbrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4,6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Bero(a)pyrene
3,4 berofluoranthene
Bero(ghi)perylene
Bero(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2,ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl beryl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibero(a,h)anthracene
1,2dichloroberene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3dichloroberidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
Z6-dinitrotoluene
1,2dipheny1hydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-mtrosodimethylamine
N-nitrosodiphenylamme
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the
Director within 90 days of sampling. The report shall be submitted to the following address:
NC DENR/ DWQ/ Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617.
*Mercury samples shall be analyzed using EPA Method 1631E.

Permit No. NCO026051
A.(5.) REUSE OF TREATMENT PLANT EFFLUENT
The effluent from the Durham County Triangle W WTP is authorized for onsite reuse subject to the
following conditions:
• The reuse water will be used onsite, within the fenced perimeter of the wastewater treatment
plant with controlled public access, and for very specific internal uses (i.e., restrooms, HVAC
system, and vehicle washdown).
• The reuse water will be used by plant personnel who are trained and knowledgeable about
reuse water.
• An RPZ device will be required onsite to protect the potable water supply
• A water meter will be installed on the reuse line to monitor usage.
• No runoff shall occur from the vehicle washdown area.
• Reuse piping valves will be properly labeled and locking.
A.(6.) NUTRIENT ALLOCATIONS
(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 Jordan Lake nutrient
management rule (T15A NCAC 02B .0270) and the status of each as of permit issuance. For
compliance purposes, this table does not supersede any TN or TP limit established elsewhere in
this permit or in the NPDES permit of a compliance association of which the Permittee is a Co-
Permittee Member.
Total Nitrogen Allocation
ALLOCATION AMOUNT (1)
ALLOCATION
SOURCE
DATE
STATUS
Delivered (lb/yr)
Discharge (lb/yr)
.TYPE
Base
Assigned by Rule
8111109
106,759
111,207
Active
(T15A NCAC 02B .0270)
TOTAL
106,759
111,207
Active
Footnote:
(1) Nitrogen Transport Factor = 96%
Total Phosphorus Allocation
ALLOCATION AMOUNT 111
ALLOCATION
SOURCE
DATE
STATUS
Delivered (lb/yr)
Discharge (Iblyr)
TYPE
Base
Assigned by Rule
8/11/09
8,179
8,432
Active
(T15A NCAC 02B .0270)
TOTAL
8,179
8,432
Active
Footnote:
(1) Phosphorus Transport Factor = 97%
(b.) Any addition, deletion, or modification of the listed allocation(s) (other than to correct
typographical errors) or any change in status of any of the listed allocations shall be considered a
major modification of this permit and shall be subject to the public review process afforded such
modifications under state and federal rules.

Permit No. NC0026051
A.(7.) ANNUAL LIMITS FOR TOTAL NITROGEN OR TOTAL PHOSPHORUS
(a.) Total Nitrogen (TN) and Total Phosphorus (TP) allocations and load limits for NPDES
dischargers in the Jordan Lake watershed are annual limits and apply on a calendar year basis.
(b.) For any given calendar year, the Permittee shall be in compliance with the annual TN (or TP)
Load limit in this Permit if:
(i.) the Permittee's annual TN (or TP) Load is less than or equal to the effective limit, or
(ii.) the Permittee is a Co-Permittee Member of a compliance association.
(c.) The TN (or TP) Load limit in this Permit may be modified as the result of allowable changes in
the Permittee's allocations.
(i.) Allowable changes include those resulting from purchase of TN (or TP) allocation from an
authorized mitigation banker, the Ecosystem Enhancement Program, or other source
allowed under applicable regulations; 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 (or TP) Load limit in this Permit to
reflect allowable changes in its allocation(s).
(A) Upon receipt of timely and proper application, the Division will modify the permit as
appropriate and in accordance with state and federal program requirements.
(B) Changes in TN (or TP) 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.
(iii.) Any requests for modification should be sent to:
NCDENR/ DWQ/ NPDES Programs
Attn: Jordan Lake Watershed Coordinator
1617 Mail Service Center
Raleigh, NC 27699-1617
(d.) If the Permittee is a member and co-permittee of an approved compliance association on January
1 of a given year, its TN and TP discharges during that year are governed by that association's
group NPDES permit and the 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 and 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.
(e.) The TN and TP monitoring and reporting requirements in this Permit remain in effect
throughout the term of the Permit and are not affected by the Permittee's membership in a
compliance association.

Permit No. NCO026051
A.(8.) CALCULATION OF TOTAL NITROGEN OR TOTAL PHOSPHORUS LOADS
(a.) The Perauttee shall calculate monthly and annual TN Loads as follows:
(i.) Monthly TN (or TP) Load (lb/mo) = TN (or TP) x TMF x 8.34
where:
TN or TP = the average Total Nitrogen or Total Phosphorus concentration
(mg/L) of the composite samples collected during the month
TMF = the Total Monthly Flow of wastewater discharged during the
month (MG/mo)
8.34 = conversion factor, from (mg/ L x MG) to pounds
(ii.) Annual TN (or TP) Load (lb/yr) = Sum of the 12 Monthly TN (or TP) Loads for the calendar
year
(b.) The Pern-d tee shall report monthly Total Nitrogen and Total Phosphorus results (mg/L and
lb/mo) in the appropriate discharge monitoring report for each month and shall report each
calendar year's results (lb/yr) with the December report for that year.
A.(9.) NUTRIENT MONITORING REOPENER
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 Il, Sections B-12 and B-13 of this permit, the Director of DWQ may reopen this
permit to require supplemental nutrient monitoring of the discharge. 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.

COUNTY OF DURHAM
ENGINEERING DEPARTMENT
UTILITY DIVISION
January 11, 2010
Return Receipt Requested
Certified Mail # 7007 0710 0003 5948 0128
Mr. Mike E. Templeton
NCDENR-Division of Water Quality Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699
Re: Draft NPDES Permit Modification
rk7d� ZCdIT1fL111..11
Durham County Triangle WWTP
Durham County
Dear Mr. Templeton:
On January 4, 2010, Durham County received your letter regarding a new draft of the subject
NPDES permit. In your letter, you state that Durham County should provide any comments
regarding the draft permit and these standard conditions to your office in writing, no later than
January 15, 2010. This office does not consider ten business days sufficient time to provide "full
and proper review of the draft permit". It is requested that Durham County be provided with a
full 30 day comment period, or that the draft permit, as provided on November 4, 2009, be
issued.
Based upon our initial review, Durham County fords that the new draft permit as proposed is
inaccurate, improperly worded, and includes requirements not supported by North Carolina
General Statutes and North Carolina Administrative Code. Our comments are as follows:
Part II Standard Conditions
Section B, General Conditions
• #l.g. 33 USC 1219 (g)(2) is an inaccurate cite.
TRIANGLE WASTEWATER TREATMENT PLANT
5926 NC Highway 55 East, Durham, N.C. 27713 • [phone] • Fax [phone]
Equal Employment/Affirmative Action Employer

Section D, Monitoring and Records
• #4 — "Personnel conducting testing of field -certified parameters must hold the
appropriate field parameter certifications." This statement is improperly worded.
Facilities and companies receive lab certifications. Personnel do not hold
certifications. This statement needs more detail to be accurate.
Part IV Special Conditions
Section C, Municipal Control of Pollutants from IU
• #2.c — This requirement is improperly worded and redundant. With respect to
improper wording the permit states, "The Permittee shall investigate the source of all
discharges into the WWTP, including slug loads and other unusual discharges, which
have the potential to adversely impact the permittee's Pretreatment Program and/or
the operation of the W WTP. "Pretreatment Program" is not defined in the permit, and
based upon its typical usage it is an administrative program not subject to impacts
from slug loads or other unusual discharges. With respect to being redundant, the
reporting requirement for slug loads or unusual discharges is a Standard Condition in
Part II.E.9.a. of the permit.
Section D, Pretreatment Programs
• #10.a, d, a and #11 — This requirement is not in accordance with current North
Carolina Administrative Code. The current code only requires reporting for
Significant Industrial Users. The requirements stated are in the "draft" administrative
code amendments.
Durham County is perplexed as to the sudden changes in the draft permit. Per a previous email
from you to me, EPA had provided no comments on Durham County's November 4, 2009 draft
NPDES permit, see enclosure. With respect to the statement in your letter: "Please note: The
Jordan Lake Wastewater Discharge rule specifies that the annual mass limits for Total
Phosphorus shall be effective beginning with calendar year 2010. Thus, the proposed TP limit in
your draft permit will take effect January 1, 2010, despite the delay in your permit modification.
We will treat the Total Nitrogen limit in the same fashion." This statement may be inaccurate.

Please do not consider these to be Durham County's complete comments on the draft permit.
These are only the comments which could be prepared within the inadequate review period.
Additional comments may be provided during the permit appeal process. If you have any
questions, please feel free to contact me.
Sincerely,
,y�L__ pz-
Joseph R. Pearce, P.E.
Utility Division Manager/POTW Director
Enclosure
cc: Coleen Sullins, NCDENR DWQ Director
Glen E. Wlusler, P.E., County Engineer

AAAw
NCDENR - 6
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor
S__06r-Ialb ju
Director
November 4, 2009
To: Michael L. Douglas, P.E.
NC DENR / DEH / Public Water Supply Section Regional Engineer
Raleigh Regional Office
From: Mike Templeton
Point Source Branch/ NPDES
Subject: Review of Draft Permit NCO026051
Durham County Triangle Wastewater Treatment Plant
Durham County
Secretary
Please indicate below your agency's position or viewpoint on the draft permit and return this form by
December 4, 2009. If you have any questions on the draft permit, please contact me at 919-807-6402 or
mike. [e-mail].
rx�rzr����xzrtrtrtzx�rtrtxxx��»xart���+a�x»»+x-x�xxxxx+rrt>Ex�x
RESPONSE: (Check one)
j� Concurs with the issuance of this permit provided the facility is operated and maintained properly,
14 the stated effluent limits are met prior to discharge, and the discharge does not contravene the
designated water quality standards.
❑ Concurs with issuance of the above permit, provided the following conditions are met:
❑ Opposes the issuance of the above permit, based on reasons stated below or attached:
Signed yl Date i Q
1617 Mail Service Certer, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 One
Phone: 9IM07-6300 \ FAX: 9IM07-6492 \ Customer Service: 1-877-623-6748 North Carolina
Internet: wwa.ncwaterqualfive rg
Action
Natimally
An Equal Opponurrry \ Alfinnative Action Employer

AFFIDAVIT OF PUBLICATION
State of North Carolina
County of Durham
Jennifer Snead, being duly sworn, says that she is the
Principal Clerk of PMG, LLC, doing business as The Herald -
Sun, a newspaper published in and of general circulation in
said County, and that a notice of which the annexed is a True
Copy, was published in said newspaper one time on the 17th
day of November, 2009.
Pri . ci 1 Clerk
Sworn to and subscribed before me this 17th day of
November, 2009.
c
otary Public 0wrarrfee
My Commission Expires: 8-15-14
Durham County, North Carolina
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The North Caroling Environmental Mandou ment Commisslon proposes to Iowa NPDES
wastewater discharge permit to Me Person(s) listed below.
Halifax Count Schools requested renewal of permit N0003800 for Pittman Elementary
School WWTP In Halifax Caonh. This Permitted mclllty dischowrtreafkiwasfewaterto
an unnamed tributary to Burnt Coal Swamp In the Tor -Pamlico River Basin.
Halifax County Schools requested renewal of permit NCO0395e0 for Eastman Middle
School W WTP in Halifax Couniv; this permitted discharge Is treated wastewgt, to an
unnamed trlbumry to Little Flshlna Creek in the Tar-Pemllco River Basin.
Halifax County Schools requested renewal of permit NC00XdWuifur Dawson Elementary
School WWTP In Halifax County; this permitted discharge is treated wastewater N an
unnamed tributary to Deep Creek, Tar-Pamlics River Basin.
Chowan County (P.O. Box 1030, Edenton, NC 27932) has walled for renewal of NPDES
permit NCO032719 for Me Valhalla Water Treatment Plant in Chowan County. This
permitted facility dlscharces treated wastewater 1a RockYhock Creek in Me Chawgn
River Basin. Currently toNl rnldual chlorine and total chloride are water quality limited.
This dlschame may affect future allocatlons In this Portion of the Chowan River Basin.
Unlfi-Kinston, LLC, lG3 Hwy it North, Kinston, NC 28502, has applied for a modification of
Its NPDES permit (NC0003760� dlacharging treated industrial wastewater M the News
River In the Neun River Basin. The NPDES permit is being mmootltlifled to Include the
discharge of siarm inter and low -flow landfill leathate. This discharge may affect future
discharges In this portion of the river basin
Durham County, TrlangIe W WTP, NCW26051, hm omiled foron NPDES permit renewal.
This facility discharges to Northeast Creek in the Cafe Fear River Basin. Currently 000
and ammonia are water goal lty Ilmited. This cWharge may stied future discharges in
this portion of the receiving stream. The City of Durham, 101 City Hall Plaza, Durham, NC 27701 has applied for renewal of
NPDES permit NCO047597 for Its South Durham Water Reclamation Facility In Durham
County, This permitted facilitvdlscharges treatedwastewaterta an unnamed tributary N
New H"Fe Creek in the Cam Fear River Basin. Currently, BOD, ammonia nitrogen, total
residual chorine, total Phosphorus, and total nitrogen are water quality limited. This
discharge may affect future allocations in this portion of the watershed.
Town of Macclesfleid has requested renewal of permit NC0050661 for the Moccleefield
WWTP in Edgecombe County. This permitted discharges is treated domestic wastewater
to Briery Branch In the Tar-Pamllao River Basin.
Feerrington Utilities, Inc.(20D0 Fearri fan Village, Plttsaoro, NC 27312) has applied far
renewal of NPDES permit number N 59 for the Fearrington Village WWTP in
Chatham County. This permitted facility discharges filter -backwash wastewaterto In the
Bush Creek in the Cape Fear River Basin. Some parameters may be waterquality limited,
which may affect future allocations in this portion of the Cape Fear River Basin.
City of Burlipton (,P.O. Box 1358, Burlington, NC 9216-1359), has applied for mmml of
NPDESpermtnumber NC0023676forthe win Burl ington WWTP. This permitted facility
discharges treated wastewater is the Big Alamance Creek In the Cape Fear River Basin.
Some parameters may be water quality limited, which nay affect future allocations in
this portion of the Cam Fear River Basin.
City of Burlington, NPDES permit NC0023e6e, has applied for renewal of Its permit
discharging to the Haw River inthe Cape Fear River Basin. BOD, ammwla, total residual
chloripe and W.1 Phosphorasare water uality limited parameters. Thiedischorse may
affect future allocations Into the receiv�he stream.
Chyd Mebane, permit No. NCa021474, hasawlledferrepewaloflispermltdischar9ingN
Mradams Creek In the Cam Fear River Basin. SOD, ammonia, total residual chloripe,
fluoride and mercury are water quality limited parameters. This discharge may affect
future allocations In this Portion of Me mcelVIng stream.
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positions, 9_19must I,flan..919-B4e-1310
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Templeton, Mike
From:
Templeton, Mike
Sent:
Friday, October 30, 2009 12:18 PM
To:
[e-mail]
Cc:
Poupart, Jeff
Subject:
nutrient limits, to optimization
Joe - In response to your October 8 email to me and your more recent call to Jeff Poupart, I am writing to confirm that
the draft permit modification for the Durham County Triangle WWTF will include the new limit for nitrogen (as well as
phosphorus) and, as a result, will not include the nitrogen optimization requirements that apply to the other Jordan Lake
dischargers under T15A NCAC 02B .0270. — Mike T
Michael E. Templeton, P.E.
Point Source Branch/ NPDES
Surface Water Protection Section
NCDENR - DWQ Raleigh, NC
Tel: [phone]
Fax: [phone]
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Low and may be disclosed to third parties.

e��
NCDENR
North Carolina Department of Environment and Natural Resources
Beverly Eaves Perdue
Governor
Glen E. Whisler, County Engineer
Durham County
120 E Parrish Street, lst Floor
Durham, North Carolina 27701
Dear Mr. Whisler:
Division of Water Quality
Coleen H. Sullins
Director
October 1, 2009
Dee Freeman
Secretary
Subject Notification of Intent to Modify NPDES Permit NCO026051
to Incorporate Jordan Lake Nutrient Requirements
Triangle WWTP
Durham County
Governor Bev Perdue recently signed legislation to complete passage of rules for the Jordan Lake
Nutrient Management Strategy. The Strategy includes a Wastewater Discharge rule (T15A NCAC 02B
.0270) that applies to your wastewater treatment facility. Pursuant to Sub -Item (6)(d) of that rule, I am
writing to notify you of (1) the nutrient allocations assigned to your facility and (2) the Division of
Water Quality's intent to modify the facility's NPDES permit to include nutrient limits as provided in
the rule. I also wish to remind you of other provisions of the rule that require your prompt attention.
This letter addresses only certain provisions of the Jordan Lake Wastewater Discharge rule. I encourage
you to familiarize yourself with the remainder of this rule.
Nutrient Allocations. The Wastewater Discharge rule establishes the maximum loads of nitrogen and
phosphorus that can be released from wastewater treatment facilities into the Jordan Lake watershed.
The rule specifies that these wasteload allocations are to be divided among the existing facilities in
proportion to their 2001 permitted flows (with certain exceptions).
Your facility has been assigned nitrogen and phosphorus allocations. The allocations are expressed as
annual mass loadings delivered to the lake. Due to foreseeable losses between the discharge point and
the lake, they are also expressed as the equivalent discharge loads at the point of discharge. The
delivered and the corresponding discharge allocations assigned to your facility are as follows:
NCO026051.
Delivered Allocation
(lb/yr)
Transport
Factor
Discharge Allocation
(lb/yr)
Total Nitrogen
106,759
96
111,207
Total Phosphorus
8,179
97
8,432
2001 Permitted Flow: 12 MGD (as defined in Wastewater Discharge rule)
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St Raleigh, North Carolina 27604 One
Phone: 919-807-M I FAX: 9IM07-64921 Customer Service: 1-877-62M748 NorthCarolina
Internet: www.nnity \ A qualitve rg
Action
a'�rytulNa //y
An Equal OppaWnitylAfirrnalive Action Employer (/yK L "

Glen E. Whisler, County Engineer
Notification of Intent to Modify NPDES Permit
October 1, 2009
Intent to Modify Permit. The new rule specifies that facilities with permitted flows at or above 0.1
MGD, including yours, will be subject to effluent limits for nitrogen and phosphorus. The effluent
limits will equal the facility's discharge allocations. The new phosphorus limits become effective
beginning with calendar year 2010. Nitrogen limits become effective beginning with calendar year
2016.
It is the Divisions intent to modify the affected permits by the end of 2009 to include the new
phosphorus limits. We will draft permit modifications for the affected facilities in the coming weeks.
As with any such permit action, the proposed modifications will be subject to public review, and we
will provide you with a copy of the draft permit at that time.
The Division will add nitrogen limits during the 2011 permit renewals, with a compliance date of 2016.
Process Optimization. The rule specifies that no later than six months after its effective date, each
discharger with a permitted flow greater than or equal to 0.5 MGD must "evaluate its treatment
facilities and operations and identify further opportunities to improve and minimize nitrogen
reduction in the existing facilities...; and submit a report to the Division documenting its findings,
proposing optimization measures, and describing expected results."
Please provide three copies of your report to the Division at the following address no later than
February 11, 2010:
Division of Water Quality
Surface Water Protection Section, Point Source Branch
Attn: Jordan Lake Coordinator
1617 Mail Service Center
Raleigh, NC 20699-1617
Each discharger must implement the proposed measures no later than six months after the Division
accepts the report and continue until such time as the facility is upgraded for nitrogen removal. The
affected dischargers must also submit annual progress report to the Division for a period of five years.
If you have any questions regarding these requirements, please contact Mike Templeton at (919) 807-
6402 or at mike. [e-mail].
Sincerely,
*o1eenS
cc: Joseph R. Pearce, Utility Division Manager -120 E Parrish St, Durham, NC 27701
Raleigh Regional Office
NDPES Files
Central Files