NC0026051_Permit Issuance_20111021

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ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
October 21, 2011
Mr. Joseph Pearce
Utility Division Manager/POTW Director
County of Durham
Engineering Department/Utility Division
5926 NC Highway 55 East
Durham, North Carolina 27713
Subject: Issuance of NPDES
Permit NC0026051
Durham County Triangle WWTP
Durham County
Facility Class N
Dear Mr. Pearce:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached NPDES discharge permit;. This permit 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 (or as subsequently amended).
The Final Permit contains following significant changes from the Draft Permit:
• Monitoring frequency for Cu and Zn were reduced to Quarterly based on the review of the effluent
data and in response to your request.
• Instream monitoring for nutrients was removed from the permit to eliminate redundancy and in
response to your request
• A special condition entitled Standard Conditions for NPDES Permits was added to the permit in
response to your request.
This Final Permit maintains the following changes contained in the Draft Permit:
• A weekly average limit for Hg has been removed from the permit based on a statistical analysis of the
effluent data. A monitoring frequency for Hg has been reduced to quarterly due to the removal of the limit.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] \Customer Service: 1-877-623-6748
Internet www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer
N000rthCarolina
atura!!j

7
• Instream monitoring at the downstream location.D2 has been deleted based on the review of the'
effluent data and in response to your request.
• Instream monitoring frequency at the downstream location D1 has been reduced to weekly during summer
period for the following parameters: dissolved oxygen, temperature, conductivity, fecal Coliform, pH. The
decision is based on the review of the monitoring data and in response to your request.
• Monitoring frequency for annual pollutant scan has been reduced to 3 times during 5 years in response to
your request.
• Monitoring frequency for chlorides has been reduced to quarterly based on the review of the effluent data
and in response to your request.
• A monthly average limit for fluoride has been added to the permit to meet the new EPA requirement.
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, con'orming to Chapter 150B of the North
Carolina General Statutes, and filed with the Office of Administrative Hdarings (6714 Mail Service Center, Raleigh,
North Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
Please note that this permit is not transferable except after notice,to the Division.- 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 or permits required by the
Division of Land Resources, the Coastal Area Management Act or any other Federal or Local governmental permit
that may be required. If you have any questions concerning this permit, please contact Sergei Chemikov at
telephone number [phone].
Sincerely,
cc: Central Files
NPDES Files
Raleigh Regional Office / Surface Water Protection Section
EPA Region N (e-copy)
Aquatic Toxicology Unit (e-copy)
Basin Coalition Coordinator ([e-mail])
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer
NorthCarolina
Naturally

4 Y Permit No. NC0026051
Y
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, II, III, and IV hereof.
This permit shall become effective December 1, 2011.
This permit and authorization to discharge shall expire at midnight on April 30, 2016.
Signed this day October 21, 2011.
owt
tit_ leen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NCOO26051 ►
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As of
this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the
exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements,
terms, and provisions included herein.
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 WWTP 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 lagoon
• Waste and return activated sludge pumping system
• Methanol, potassium hydroxide, and sodium hypochlorite storage and feed systems
• Liquid waste activated sludge storage (projected service date is the end of 2012)
• Dewatering facility (projected service date is the end of 2012)
• Truck loading for contract composting operation (projected service date is the end of 2012)
2. Discharge from said treatment works (via Outfall 001) into Northeast Creek, a Class WS-IV NSW
water in the Cape Fear River Basin, at the location specified on the attached map.

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Durham Co. Triangle WWTP - NC0026051
Facility •
Location
USGS Quad Name: SW Durham
Receiving Stream: Northeast Creek
Stream Class: WS-IV NSW
Subbasin: Cape Fear — 03-06-05
Lat.: 35°52'51"
Long.: 78°53'50"
-�-
North
SCALE 1: 24,000

Permit No. NC0026051
1
1 �
• 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
Infuent or Effluent
Total Monthly•
Monitor
& Report
Monthly
Recorded or
Calculated
Influent or Effluent
BO d'
5.0 mg/L
7.5 mg/L
Daily
Composite
Influent &Effluent
5-day,'
10.0 mg/L
15.0 mg/L
Daily
Composite
Influent &Effluent
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
DailyNH3
Composite
Influent &Effluent
as N
1-October 31)
1.0 mg/L
3.0 mg/L
Daily(April
Composite
Effluent
NH3 as N
1-March 31)
1.8 mg/L
5.4 mg/L
Daily(November
Composite
Effluent
Fecal Coliform
(geometric mean)
200/100mL
Daily
Grab
Effluent
Dissolved 0xygen3
Daily
Grab
Effluent
Temperature (°C)
Daily
Grab
Effluent
pH '
Daily
Grab
Effluent
Total Residual Chlorines
17 ug/L
Daily
Grab
Effluent
Chloroforms
2/Month
Grab
Effluent
Bromodichloromethanes
1.8 pg/L
Weekly
Grab
Effluent
Dibromochloromethane`
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 ` '
Monitor &Report (Ib/mo)
111,207 Ib/yr
Monthly
Annually
Calculated
Effluent
Total Phosphorus, TP
Monitor &Report
Weekly
Composite
Effluent
TP Load G '
Monitor &Report (Ib/mo)
8,432 Ib/yr
Monthly
Annually
Calculated
Effluent
Total Mercury8
12 ng/L
36 ng/L
Quarterly
Grab
Effluent
Fluoride
1800 pg/L
1800 pg/L
Weekly
Composite
Effluent
Total Copper
Quarterly
Composite
Effluent
Total Zinc
Quarterly
Composite
Effluent
Chloride
Quarterly
Composite
Effluent
Effluent Pollutant Scan e
See footnote
9
Composite/
Grab
Effluent
Chronic Toxicity 10
Quarterly
Composite
Effluent
All footnotes are listed on the following page.

Permit No. NC00!6051 '
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. The Division shall consider all effluent
TRC values reported below 50 pg/L to be in compliance with the permit. However, the Permittee shall continue to record
and submit all values reported by a North Carolina certified laboratory (including field certified), even if these values fall
below 50 pg/L.
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. Sampling should be conducted 3 times during the 5 year permit term. 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 belowl:
INSTREAM
CHARACTERISTICS
MONITORING REQUIREMENTS
MEASUREMENT FREQUENCY
SAMPLE TYPE
SAMPLE LOCATION2
Dissolved Oxygen
Weekly
Grab
Upstream, D1
Temperature
Weekly
Grab
Upstream, D1
Conductivity
Weekly
Grab
Upstream, Di
Fecal Coliform
Weekly
Grab
Upstream, Di
pH
Weekly
Grab
Upstream, Di
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.

Permit No. NC0026051
4
■ t
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 90%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in
the "North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or
subsequent versions or "North Carolina Phase II 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 II 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. The facility shall conduct
the second species toxicity test four times during the term of the permit and submit the testing results
with the renewal package. Testing shall reflect the seasonal variability.

Permit No. NC066051
A.(4.) EFFLUENT POLLUTANT SCAN
The Permittee shall perform an Effluent Pollutant Scan for all parameters listed in the attached table 3
times during the upcoming permit term. 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) Trans-1,2-dichloroethylene Bis (2-chloroethyl) ether
Chlorine (total residual, TRC) 1,1-dichloroethylene Bis (2-chloroisopropyl) ether
Dissolved oxygen 1,2-dichloropropane Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-trichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-trichloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead Acid -extractable compounds: Diethyl phthalate
Mercury* P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachlorobutadiene
Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base -neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
Dichlorobromomethane Benzo(ghi)perylene 1,2,4-trichlorobenzene
1,1-dichloroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis (2-chloroethoxy) methane
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. NC0026051
A.(5.) REUSE OF TREATMENT PLANT EFFLUENT
The effluent from the Durham County Triangle WWTP 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
TYPE
SOURCE
DATE
ALLOCATION AMOUNT (1
Delivered (Ib/yr)
Base Assigned by Rule
(T15A NCAC 02B 0270)
Footnote:
(1) Nitrogen Transport Factor = 96%
Total Phosphorus Allocation
8/11/09
TOTAL
Discharge (Ib/yr)
106,759
106,759
111,207
111,207
STATUS
Active
Active
ALLOCATION
TYPE
SOURCE
DATE
ALLOCATION AMOUNT (1)
STATUS
Delivered (Ib/yr)
Discharge (Ib/yr)
Base
Assigned by Rule
(T15A NCAC 02B .0270)
8/11/09
8,179
8,432
Active
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.
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.
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.
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.)
(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.
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.
A.(8.) CALCULATION OF TOTAL NITROGEN OR TOTAL PHOSPHORUS LOADS
(a.) The Permittee shall calculate monthly and annual TN Loads as follows:

Permit No. NC0026051
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
Annual TN (or TP) Load (1b/yr) = Sum of the 12 Monthly TN (or TP) Loads for the calendar
year
(b.) The Permittee 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.
(c.) The Permittee shall report monthly volume of water discharged from the blow -off valves and
Total Nitrogen and Total Phosphorus content of the discharge (mg/L and lb/month).
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 II, 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.
A.(10.) STANDARD CONDITIONS FOR NPDES PERMITS
The Division will provide an updated version of the Standard Conditions for NPDES Permits to the
permittee upon approval of the version by the EPA. Then, the old version shall be replaced with an
updated version.

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
SAM NUNN
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA GEORGIA 30303-8960
JUL 2 0 2011
Mr. Jeff Poupart
Supervisor, NPDES Unit
North Carolina Department of Environment
and Natural Resources
Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Draft National Pollutant Discharge Elimination System Permit Review
Durham Triangle Wastewater Treatment Plant (NC0026051)
Dear Mr. Poupart:
On May 31, 2011, the above -referenced draft National Pollutant Discharge Elimination System
(NPDES) permit was received by the United States Environmental Protection Agency via regular mail
from the North Carolina Department of Environment and Natural Resources (NCDENR), Division of
Water Quality (DWQ), complex permitting section. The EPA's concerns with the actions taken in the
draft permit were discussed in depth with the DWQ staff on July 7, 2011, in a telephone conference call.
To document those comments and in accordance with the EPA/North Carolina NPDES Memorandum of
Agreement, we have completed our review of the above draft permit and have the following comments
which should be addressed prior to final issuance:
Background
Durham Triangle Wastewater Treatment Plant is in the Cape Fear priority river basin in central North
Carolina, and is rated a major facility with a 12 mgd design flow for domestic wastewater treatment. The
plant also has an active industrial pretreatment program and discharges to a 303(d) listed stream with
impairment from Mercury (Hg). Note that all [receiving] waters in North Carolina are 303(d) listed for
mercury impairment based on the "statewide fish consumption advisory," and the state has not yet
developed a Total Maximum Daily Load (TMDL) for Hg, nor has the state adopted the methyl -mercury
fish -tissue criteria. Further, the receiving waters for this facility are classified as a source for drinking
water (WS-IV, NSW) and the stream flow is rated at 0 cfs; thus, the discharge from this plant is
essentially the stream. The state water quality standard (WQS) for mercury is 0.012 pg/L (12 ng/L).
Issue
For development of the new draft permit, a reasonable potential analysis was performed using 64 data
points from the last year and a half of the current permit period; however, note that the DWQ chose to
discount a notice of violation from 2008 for a mercury limit exceedance. The facility's compliance
review exposed Whole Effluent Toxicity failures, and excessive pH was reported on the new
application. These issues combined would indicate a reasonable potential for mercury to pass through
the facility and violate the WQS. Calculations were performed disallowing [instream] dilution with a
result of 5.3 ng/L for Hg as the maximum predicted Cw, or water quality based effluent limit for the
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable • Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30% Postconsumer)

plant. Based on this analysis, where 5.3 ng/L < WQS = 12 ng/L, the permit writer removed the Hg limit
and recommended "monitoring" only and reduced the frequency of monitoring to quarterly.
There are no apparent antidegradation issues, i.e., no new sources/dischargers to the facility, etc.,
however, because the previous permit had a Total Mercury weekly average limit of 0.012 µg/L (12
ng/L) consistent with the WQS; and there is still no mercury TMDL with wasteload allocations to
address the 303(d) listing, the EPA contends antibacksliding provisions prevail. It is the antibacksliding
provision of the Clean Water Act (CWA) that prohibits the removal of the previous permit's Total
Mercury limit at this time.
Specifically, CWA Section 303(d)(4)(A) prohibits the revision of any effluent limit for the impairing
parameter, unless the "cumulative effect of all such revised effluent limitations will assure the
attainment of the WQS. Therefore, removal of the limit would only be allowed in the context of a
TMDL or other watershed level analysis. Absent this type of analysis, the removal of the limit would not
meet the 303(d)(4)(A) condition, and would therefore be prohibited under CWA 402(o)(1). Until the
TMDL is developed, the EPA contends that the current end -of -pipe, weekly average limit of 0.012 µg/L
or 12 ng/L for Total Mercury must remain in the new permit. This comment is consistent on a national
basis with the EPA's implementation of CWA Section 303(d)(4)(A) for discharges into impaired waters
prior to a TMDL. The EPA does not oppose reducing the frequency of monitoring to quarterly for this
reissuance.
We request that you address the concerns stated above prior to issuance and forward a copy of the final
permit to the EPA. If you have any questions, please contact Ms. Pamala Myers of my staff at (404)
562-9421 or by email at [e-mail].
Sincerely,
./)6.
Christopher B. Thom, Chief
Pollution Control and Implementation Branch
Water Protection Division
cc: Mr. Joseph R. Pearce
Utility Division Manager/POTW Director

Chernikov, Sergei
From: Thomas, Andrea
Sent: Wednesday, July 06, 2011 10:05 AM
To: Chernikov, Sergei
Subject: RE: question
Yes 83660000 is an active AMS station.
Andrea 5. Thomas
NC DWQ- Environmental Sciences Section
Phone- [phone]
Fax- [phone]
Email- [e-mail]
http://portal.ncdenr.org/web/wQ/ess/eco/ams
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to
third parties.
From: Chernikov, Sergei
Sent: Tuesday, July 05, 2011 12:06 PM
To: Thomas, Andrea
Subject: question
Andrea,
I was wondering if you could confirm that Monitoring Station #83660000 on the Northeast Creek (Cape Fear River Basin)
is operational and DWQ conducts sampling.
Thank you!
Sergei
Sergei Chernikov, Ph.D.
Environmental Engineer II
Complex Permitting Unit
Phone: [phone], fax [phone]
1617 Mail Service Center
Raleigh, NC 27699-1617
Express mail: 512 North Salisbury St.
Raleigh, NC 27606
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
1

COUNTY OF DURHAM
ENGINEERING DEPARTMENT
UTILITY DIVISION
June 17, 2011
RETURN RECEIPT REQUESTED
CERTIFIED MAIL # 7008 1830 0004 1522 1916
Mr. Sergei Chernikov, Ph.D., NPDES Permitting
NC Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Re: Comments on Draft NPDES Permit NC0026051
Dear Mr. Chernikov:
Thank you for the opportunity to comment on the May 25, 2011 draft NPDES permit. We have
reviewed the draft NPDES permit and our comments are listed below.
D ! (' 1 'n - Lei
{)
• JUN 2 0 2011
L
DENR-WATER QUALITY
POINT SOURCE BRANCH
1. Due to delays in receiving the Authorization to Construct, the Phase III sludge project
was delayed. The project has been tentatively awarded and the completion date is
scheduled for December, 2012. Therefore, the projected service date for liquid waste
activated sludge storage, dewatering facility, and truck loading for contract composting
operation on the Supplement to Permit Cover Sheet needs to be modified to the end of
2012.
2. After reviewing Effluent Limitations and Monitoring Requirements A.(1.), Durham
County is requesting that the monitoring requirements for total copper and total zinc be
reduced from monthly to quarterly. The Triangle Wastewater Treatment Plant has not
experienced any toxicity issues in several years and currently conducts analysis quarterly
per our Long Term Monitoring Plan (LTMP) which includes these parameters.
3. Durham County is requesting that the in -stream monitoring requirements A.(2.) be
removed. Currently, DWQ has an ambient monitoring station (Station #B3660000)
located downstream of the Triangle Wastewater Treatment Plant and per the North
Carolina Ambient Monitoring Station (NC AMS) Quality Assurance Project Plan
(QAPP) dated September, 2004, the following parameters are analyzed:
TRIANGLE WASTEWATER TREATMENT PLANT
5926 NC Highway 55 East, Durham, N.C. 27713 • [phone] • Fax [phone]
Equal Employment/Affirmative Action Employer

- Monthly: pH, dissolved oxygen, conductivity, temperature, fecal, turbidity
and nutrients
- Quarterly: total suspended solids and metals
Durham County believes this is redundant sampling and is an inefficient use of resources.
Currently, the City of Durham monitors the upstream location on a monthly basis every
other year for pH, dissolved oxygen, temperature, conductivity, turbidity, nutrients, total
suspended solids, copper and zinc. The City also conducts special studies from time to
time. Durham County Triangle Wastewater Treatment Plant has no affect on the
upstream water quality and believes this is unnecessary.
Durham- County may contest any stream sampling beyond the minimum required by
T15A: 02B.0500. Also, please note Durham County has in-house certifications for the
tests as required by T15A: 02B.0500. The additional tests required in the draft require
the use of outside labs, and considerable expense. Please recognize that Durham County
voluntary submitted to the early application of the Jordan Lake nutrient limits, and as
such believes it is most appropriate to use ratepayer's remittances for the treatment of
wastewater and not for redundant stream monitoring.
4. The first paragraph in Section A.(4.) Effluent Pollutant Scan states "annual Effluent
Pollutant Scan" and needs to be re -worded to coincide with the change in the permit. The
permit states sampling should be conducted 3 times during the 5 year permit term.
5. In November, 2010 a permit modification request was mailed to Mrs. Dina Sprinkle
requesting the NPDES permit to include monitoring for the volume of reclaimed water
and the mass nutrients for all blow -off valve releases as required by Permit WQ0032821.
A copy of the letter is attached. This modification was not included in the draft permit.
6. After reviewing the Standard Conditions, Durham County staff has determined that the
language in Part IV does not coincide with the current Pretreatment Regulations, 15A
NCAC 02H.0900. The Standard Conditions should match current regulations.
We trust that these comments will be thoroughly considered. If you have any questions or need
any clarification please contact me at [phone].
Sincerely,
oseph R. Pearce, P.E.
Utility Division Manager/POTW Director
cc: Jeff Poupart, NCDENR-DWQ
Glen E. Whisler, P.E., County Engineer
Stephanie Brixey, Compliance Manager
JRP/SAB/cs

COUNTY OF DURHAM
ENGINEERING DEPARTMENT
UTILITY DIVISION
November 8, 2010
RETURN RECEIPT REQUESTED
CERTIFIED MAIL # 7008 1830 0004 1522 2432
Mrs. Dina Sprinkle
NCDENR/DWQ/NPDES
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Re: NC0026051 Permit Modification Request
Dear Mrs. Sprinkle:
Durham County is requesting a permit modification to NC0026051 to incorporate the requirements of a
modified Conjunctive Reclaimed Water Utilization System Permit, WQ0032821, received on November
5, 2010. Section I1I.8 states, "The permittee shall request a NPDES permit modification to include
monitoring for the volume of reclaimed water and the mass of nutrients for all blow -off valve releases in
the NPDES permit." This section is included for your review. Durham County must obtain this NPDES
permit modification prior to operating the reclaimed water distribution system. Durham County
submitted the NPDES permit renewal application which was received by the NPDES Permitting Unit on
October 21, 2010.
If you have questions or concerns, please contact me at [phone].
Sincerely
eph`R. Pearce
Utt ity Division Manager/POTW Director
cc: Stephanie Brixey, Compliance Manager
Rob Stewart, TWWTP Superintendent
JRP/SAB/cs
TRIANGLE WASTEWATER TREATMENT PLANT
5926 NC Highway 55 East, Durham, N.C. 27713 • [phone] • Fax [phone]
Equal Employment/Affirmative Action Employer

7. An education program shall be developed and implemented to inform reclaimed water bulk
distribution users of the proper use of reclaimed water. Educational material shall be provided to all
facilities provided with reclaimed water, and these materials shall be maintained consistent with the
reclaimed water uses. All educational materials shall be made available to the Division upon request.
8. All reclaimed water generated at the Durham County Triangle WWTP (NC0026051) that is released
from Durham County -owned distribution system blow -off valve (BOV) assemblies onto the ground
surface (which can flow to surface waters of the State) shall be monitored and recorded in accordance
with NPDES permit requirements. Also, all reclaimed water BOV release data provided to Durham
County from the Town of Cary shall be reported. The Permittee shall request a NPDES permit
modification to include monitoring for the volume of reclaimed water and the mass of nutrients for all
BOV releases in the NPDES permit. Approval of this NPDES permit modification shall be obtained
prior to operation of the reclaimed water distribution system (i.e., not applicable to the bulk
operation).
IV. MONITORING AND REPORTING REQUIREMENTS
1. Any Division required monitoring (including groundwater, plant tissue, soil and surface water
analyses) necessary to ensure groundwater and surface water protection shall be established, and an
acceptable sampling reporting schedule shall be followed.
2. Per ] 5A NCAC 02H .0800, a Division certified laboratory shall conduct all laboratory analyses for
the required effluent, groundwater or surface water parameters.
3. Flow distributed to the conjunctive reclaimed water system shall be continuously monitored, and
daily flow values shall be reported on Form NDMR.
The Permittee shall install and maintain an appropriate flow measurement device to ensure the
accuracy and reliability of flow measurement consistent with accepted engineering and scientific
practices. Selected flow measurement devices shall be capable of measuring flows with a maximum
deviation of less than ten percent from true flow; accurately calibrated at a minimum of once per year;
and maintained to ensure the accuracy of measurements is consistent with the selected device's
accepted capability. The Permittee shall maintain records of flow measurement device calibration on
file for a period of at least five years. At a minimum, documentation shall include:
a. Date of flow measurement device calibration,
b. Name of person performing calibration, and
c. Percent from true flow.
4. The Permittee shall monitor the effluent from the subject facilities at the frequencies and locations for
the parameters specified in Attachment A.
5. The Permittee shall maintain adequate records tracking the amount of reclaimed water distributed
(PPI-001). These records shall include, but are not necessarily limited to, the following information:
a. Date of distribution, and
b. Volume of reclaimed water distributed (i.e., monthly total).
6. The Permittee shall maintain adequate records tracking the amount of reclaimed water distributed at
its bulk distribution fill station (PP1-002). These records shall include, but are not necessarily limited
to, the following information:
c. Date of distribution.
d. Name and drivers license number of truck operator,
e. Bulk fill certification number or equivalent (proof of certification provided to reclaimed water
user),
f. Name of end user,
WQ0032821 Version 1.2
Shell Version 090806 Page 5 of 10

•
1
MEMORANDUM
To:
May 25, 2011
Michael Douglass, Regional Engineer
NC DENR / DEH / Public Water Supply Section
Raleigh Regional Office
From: Sergei Chernikov, Environmental Engineer II, Complex NPDES. Unit,
Division of Water Quality (fax-919-807-6495)
Subject: Review of the discharge locations for the following:
Review of Draft NPDES Permit NC0026051
Durham County triangle WWTP
Durham County
Please indicate below by June 27, 2010 your agency's position or viewpoint on the facility
listed above. We cannot issue the permit without your concurrence. Please return this form
at your earliest convenience.
RESPONSE:
x
This agency has reviewed the draft permit and determined that the proposed
discharge will not be sufficiently close to any existing or known proposed
public water supply intake so as to create an adverse effect on water quality.
We concur with the issuance of this permit provided the facility is operated
and maintained properly, 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:
JUN 2 2011
DENR-WATER QUALITY
POINT SOURCE BRANCH

!ijc 31cvaffi3isn
Trusted & Essential
Affidavit of Publication
State of North Carolina,
Durham County
To Whom It May Concern:
This is to certify the
Advertisement attached
Hereto has been published
in -
The Herald Sun
on the foollowing dates:
2q I
Sworn to on this 21 f4-1 day
of m 11
, 2011
Her. Sun Representative
Sworn to and Subscribed
Before me this 3t k clay
of M , 2011
Notary Public
Public Notice
North Carolina Environmental
Management
CcmmissioniNRDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice cf Intent to Issue a
NPDES Wastewater Permit
The North Carolina Environ-
mental Management Ccmmis-
si cn proposes to issue a
NPDES wastewater discharge
permit to the person(s) listed
below.
Written comments regarding
the proposed permit will be ac-
cepted until 30 days after the
publish date of this notice. The
Director of the NC Division of
Water Quality (DWQ) may
hold a public hearing should
there be a significant degree of
public interest. Please mail
comments and/or information
requests to DWQ at the above
address. Interested persons
may visit the DWQ at 512 N.
Salisbury Street, Raleigh, NC
to review information on file.
Additional information on
NPDES permits and this notice
may be found on our website:
http://portal.ncdenr. org/web/wq
/swp/ps/npdes/calendar, or by
caiiing (9 i 9) 807-' 04.
Durham County requested re-
newal of permit NC0026051
for Triangle WWTP in Durham
County; this facility discharge
is treated municipal wastewa-
ter to Northeast Creek, Cape
Fear River Basin.
H S: May 27, 2011

Chernikov, Sergei
From: Chernikov, Sergei
Sent: Tuesday, May 10, 2011 8:01 AM
To: Poupart, Jeff
Cc: Belnick, Tom
Subject: Durham County WWTP
Jeff,
I just wanted to summarize the results of our discussions yesterday regarding the Durham County WWTP for Tom.
1) Changes to the boilerplate language are likely to take a substantial amount of time and there is no sense to
wait. I need to proceed to the public notice.
2) I can make the following changes to the permit:
a) PPA scan — 3 times per permit cycle instead of 5.
b) Eliminate a second downstream monitoring station.
c) Reduce the instream monitoring frequency from 3/week to weekly for the following parameters: DO, temp.,
conductivity, fecal coliform and pH.
Sergei
Sergei Chernikov, Ph.D.
Environmental Engineer II
Complex Permitting Unit
Phone: [phone], fax [phone]
1617 Mail Service Center
Raleigh, NC 27699-1617
Express mail: 512 North Salisbury St.
Raleigh, NC 27606
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be
disclosed to third parties.
1

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0026051
Facility Information
Applicant/Facility Name:
Durham County Triangle WWTP
Applicant Address:
120 Parrish Street, Suite 110 Durham, NC27701
Facility Address:
5926 NC Highway 55 East, Durham, North Carolina 27713
Permitted Flow
12.0 MGD
Type of Waste:
Domestic (70%) and industrial (30%) with pretreatment program
Facility/Permit Status:
Class IV /Active; Renewal
County:
Durham County
Miscellaneous
Receiving Stream:
Northeast Creek
Regional Office:
Raleigh (RRO)
Stream Classification:
WS-IV NSW
State Grid / USGS Quad:
D23NW/SWDurham
303(d) Listed?
Yes
Permit Writer:
Sergei Chernikov
Subbasin:
03-06-05 -
Date:
May 10, 2011
Drainage Area (mi2):
18
Lat. 35° 52' 51"N Long. 78° 53' 50" W
7Q10 (cfs)
0
30Q2 (cfs)
0.9
Average Flow (cfs):
20.0
IWC (%):
100%
BACKGROUND
The Durham County Triangle WWTP (Class IV) has a permitted flow of 12.0 MGD. The permit
was renewed in May 2002 for 6.0 MGD with authorization to expand to 12.0 MGD. The plant
expansion/upgrade was completed in June 2005.
Durham County has a full pretreatment program (16 SIUs) with the Division of Water Quality's
Pretreatment Unit and will continue to implement this program in the new permit term.
REASONABLE POTENTIAL ANALYSIS
Reasonable potential analysis was conducted for: As, Chloride, Cd, Cr, Cu, CN, F, Pb, Hg, Mo, Ni, Se,
Ag, and Zn (please see attached).
TOXICITY TESTING:
Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
The facility has been consistently passing its WET tests with one exception. The facility failed its toxicity
tests in August of 2007. Toxicity tests conducted after the failure passed.
Chronic P/F
001: Chronic P/F @ 90%
001: Chronic P/F @ 90%
February, May, August, November
COMPLIANCE SUMMARY:
DMRs have been reviewed for the period January 2007 through March 2011. Facility has a good
compliance record. During the review period, the only one NOV (notice of violation) was issued:
05/31/08 — Hg.
A compliance evaluation inspection conducted on January 7, 2010 found that the facility is well
maintained and in compliance.
Fact Sheet
NPDES NC0026051 Renewal
Page 1

INSTREAM MONITORING
This facility discharges to Northeast Creek in subbasin 03-06-05 in the Cape Fear River Basin.
The receiving stream is classified WS-IV NSW at this point. Northeast Creek below the
discharge is listed on the 303(d) list as impaired for aquatic life due to Zinc standard violation.
PERMITTING STRATEGY
The nutrient monitoring conditions and permit limits are based on the lake Jordan water quality
model.
SUMMARY OF PROPOSED CHANGES
• A weekly average limit for Hg has been removed from the permit based on a
statistical analysis of the effluent data. A monitoring frequency for Hg has been
reduced to quarterly due to the removal of the limit.
• Instream monitoring at the downstream location D2 has been deleted based on the
review of the effluent data and in response the permittee's request.
• Instream monitoring frequency -at the downstream location D1 has been reduced
to weekly during summer period for the following parameters: dissolved oxygen,
temperature, conductivity, fecal Colifonn, pH. The decision is based on the
review of the monitoring data and in response the permittee's request.
• Monitoring frequency for annual pollutant scan has been reduced to 3 times
during 5 years in response the permittee's request.
• Monitoring frequency for chlorides has been reduced to quarterly based on the
review of the effluent data and in response the permittee's request.
• A monthly average limit for fluoride has been added to the permit to meet the new EPA
requirement.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice:
Permit Scheduled to Issue:
NPDES CONTACT
May 25, 2011
July 18, 2011
If you have questions regarding any of the above information or on the attached permit, please contact
Sergei Chernikov at [phone].
REGIONAL OFFICE COMMENTS
Fact Sheet
NPDES NC002605 1 Renewal
Page 2

Triangle WWTP
NC0026051
REASONABLE POTENTIAL ANALYSIS
Qw (MGD) = 12.00
IQIOS (cfs) = 0.00
7Q 1 OS (cfs) = 0.00
7Q1 OW (cfs) = NO 7Q10w DATA
30Q2 (cfs) = 0.90
Avg. Stream Flow, QA (cfs) = 20.00
Receiving Stream: Northeast Creek
WWTP/WTP Class: IV
IWC @ 1Q10S = 100.00%
IWC @ 7Q10S = 100.00%
IWC @ 7QIOW = N/A
IWC @ 30Q2 = 95.38%
IWC @QA= 48.19%
Stream Class: WS-IV NSW
Outfall 001
Qw = 12 MGD
PARAMETER
TYPE
(1)
STANDARDS & CRITERIA (2)
PQL I
cn F
zMax
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
NC WQS /
Chronic
Applied
Standard
'V2 FAV /
Acute
n
Pred
# Det. Cw Allowable Cw
Arsenic
Arsenic
C
C
50
10
FW(7Q10s)
HH/WS(Qavg)
ug/L
ug/L
13
13
0
0
13.7
13.7
Acute: NO WQS
_ _ _ ___
Chronic: 50.0
N_ o value > Allowable Cw
Chronic: 20.8
No value> Allowable Cw
no Inuit because all values are below detect
___________________________
_ _ _ _ _ _ _ _ _ _ _ _ _
Cadmium
NC
2
FW(7Q10s)
15
ug/L
14
0
3.4
Acute: 15.0
_ _-___ ____
Chronic: 2.0
No value > Allowable Cw
no limit because al values are below detect
___________________________
Chlorides
NC
250
WS(7QI0s)
mg/L
16
16
189
Acute: NO WQS
_ ___ ____
Chronic: 250
No value > Allowable Cw
no limit
___________________________
reduee the monitoring to quarterly
Chromium
NC
50
FW(7Q10s)
1022
ug/L
12
4
5.7
Acute: 1,022.0
_ ___ ____
Chronic: 50.0
No value > Allowable Cw
no limit
------ ------------------- __-
Copper(AL)
NC
7
FW(7Q10s)
7
ug/L
18
2
33
Acute: 7.3
__ _ _ _____ ___
Chronic: 7.0
1 value(s) > Allowable C'w
no limit
____________________________
action level standard
Cyanide
NC
5
FW(7Q10s)
22
10
ug/L
12
0
5.0
Acute: 22.0
Chronic: 5.0
No value > Allowable Cw
no limit
Fluoride
NC
1800
FW(7Q10s)
ug/L
63
63
1,920.0
Acute: NO WQS
_ _ _____ _ __
Chronic: 1,800.0
No value > Allowable Cw
keep the limit
_________________________ _
add the monthly average limit
Lead
NC
25
FW(7Q10s)
33.8
ug/L
12
0
16.6
Acute: 33.8
_ oni_ _ _ _ _
Chrc: 25.0
No value > Allowable ('w
no limit
_ _ _ _ _ _ _ _ _ _ _ _ _
Mercury
NC
12
FW(7Q10s)
0.5
ng/L
64
29
5.3
Acute: NO WQS
_ _____ ___
Chronic: 12.0
No value > Allowable Cw
remove the limit
_ _ _ _ _ _ _ _ _ _ _ _ _ _
reduce monitoring to quarterly
Acute: NO WQS
,,,, i.n,..
Page 1 of 2
26051 RPA-2011.xlsm, rpa
4/12/2011

Triangle WWTP
NC0026051
REASONABLE POTENTIAL ANALYSIS
Outfall 001
w=12MGD
Molybdenum
NC
2000
HH(7Q10s)
ug/L
11
11
91.2
_ _ _ -
Chronic: 2___
No value > Allowable Cw
----------------------------
Nickel
NC
88
FW(7Q10s)
261
ug/L
11
6
26.5
Acute: 261.0
0-------------------------------
Ch_ ronic:--- _ 88._
No value > Allowable Cw
no limit
Selenium
NC
5
FW(7Q10s)
56
ug/L
12
0
13.5
Acute: 56.0
__ _ ---- _ ---
Chronic:—5.0
No value > Allowable Cw
no limit because all values are below detect
---
-------------------------
Silver(AL)
NC
0.06
FW(7Q10s)
1.23
ug/L
11
2
7.925
Acute: 1.230no
_ _ _ _____ _ __
Chronic: 0.060
10 value(s) > Allowable Cw
limit
_ _ _ _ _ _______ __ _
action level standard
Zinc (AL)
NC
50
FW(7Q10s)
67
ug/L
17
17
229.2
Acute: 67.0
Chronic: 50.0
17 value(s) > Allowable Cw
no limit
action level standard
0
0
N/A
Acute:
_
Chronic: ----------
----------------------------
0
0
N/A
Acute:
_ _ --- -------
Chronic:
----------------------------
0
0
N/A
Acute:
Chronic:----------
----------------------------
0
0
N/A
Acute:
— — — — —
Chronic:
— — — — — — — — — — — — — —
Page 2 of 2
26051 RPA-2011.xlsm, rpa
4/12/2011

REASONABLE POTENTIAL ANALYSIS
Arsenic - FW Standard
Date Data BDL=1/2DL Results
1 < 2 1 Std Dev.
2 < 10 5 Mean
3 < 2 1 C.V.
4 < 10 5 n
5 < 10 5
6 < 10 5 Mult Factor =
7 < 10 5 Max. Value
8 < 10 5 Max. Pred Cw
9 < 2.8 1.4
10 < 10 5
11 < 2 1
12 < 2.8 1.4
13 < 2.8 1.4
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
SPECIAL -
Values" WITH
"COPY"
1.9768
3.2462
0.6090
13
2.74
5.0 ug/L
13.7 ug/L
Arsenic - HH/WS Standards
Date Data BDL=1/2DL Results
1 1/0/1900 < 2 1 Std Dev.
2 1/0/1900 < 10 5 Mean
3 1/0/1900 < 2 1 C.V.
4 1/0/1900 < 10 5 n
5 1/0/1900 < 10 5
6 1/0/1900 < 10 5 Mult Factor =
7 1/0/1900 < 10 5 Max. Value
8 1/0/1900 < 10 5 Max. Pred Cw
9 1/0/1900 < 2.8 1.4
10 1/0/1900 < 10 5
11 1/0/1900 < 2 1
12 1/0/1900 < 2.8 1.4
13 1/0/1900 < 2.8 1.4
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
THIS SECTION
1.9768
3.2462
0.6090
13
2.74
5.0 ug/L
13.7 ug/L
-1-
26051 RPA-2011.xlsm, data
4/12/2011

REASONABLE POTENTIAL ANALYSIS
Cadmium
Date Data BDL=1/2DL Results
1 '<l 0.15 0.075 Std Dev. 0.4036
2 <: 1.00 0.5 Mean 0.5071
3 y 0.15 0.075 C.V. 0.7959
4 J"< 2.00 1 n 14
5 2.00 1
6 <" 2.00 1 Mull Factor = 3.38
7 < 2.00 1 Max. Value 1.0 ug/L
8 i,<`' 2.00 1 Max. Pred Cw 3.4 ug/L
9 '<- 0.10 0.05
10 1s 0.50 0.25
11 1.00 0.5
120.50 0.25
13 0.40 0.2
14 0.40 0.2
Chlorides
SPECIAL -
Values" WITH
"COPY"
Date
Data
BDL=1/2DL Results
110 110 Std Dev. 22.8018
116 116 Mean 75.7
69.8 69.8 C.V. 0.3014
101 101 n 16
84.5 84.5
15.8 15.8 Mult Factor = 1.6
56.5 56.5 Max. Value 116.0
72.9 72.9 Max. Pred Cw 189.1
72.5 72.5
72.5 72.5
69.2 69.2
79.6 79.6
79.7 79.7
69.9 69.9
77.3 77.3
63.4 63.4
Values" WI
"COPY"
COMMAN
-4-
26051 RPA-2011.xlsm, data
4/12/2011

REASONABLE POTENTIAL ANALYSIS
Chromium
Date Data BDL =1/2DL Results
1 2 2 Std Dev.
2 <. 5 2.5 Mean
3 c 2 1 C.V.
4 <. 5 2.5 n
5 5 2.5
6 as 5 2.5 Mult Factor =
mg/L 7 < 5 2.5 Max. Value
mg/L 8 < 5 2.5 Max. Pred Cw
9 0.5 0.5
10 1 0.5
11 F 1.2 1.2
12 " 1.2 1.2
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
SPECIAL -
Values" WITH
"COPY"
0.8376
1.7833
0.4697
12
Data BDL=I/2DL Results
1 " 2 1 Std Dev. 1.7564
2 2 1 Mean 1.5556
3 2 1 C.V. 1.1291
4 2 1 n 18
5 2 1
2.29 6 2 1 Mult Factor = 4.17
2.5 ug/L 7 2 1 Max. Value 8.0
5.7 ug/L 8 2 1 Max. Pred Cw 33.4
9 2 1
10 2 1
11 8 8
12 4 4
13 2 1
14 2 1
15 2 1
16 2 1
17 2 1
18 2 1
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
-7-
26051 RPA-2011.xlsm, data
4/12/2011

REASONABLE POTENTIAL ANALYSIS
ITH
ug/L
ug/L
Date
Cyanide
Data BDL=1l2DL Results
5
5
5
5
5
5
5
4
5
4
4
4
SPECIAL -
Values" W1TH
"COPY"
5 Std Dev. 0.0000
5 Mean 5.00
5 C.V. 0.0000
5 n 12
5
5 Mult Factor = 1.00
5 Max. Value 5.0 ug/L
5 Max. Pred Cw 5.0 ug/L
5
5
5
5
Fluoride
Date
Data
BDL=1/2DL Results
SPECIA
Values"
"COP
1100 1100 Std Dev. 202,5586
1100 1100 Mean 930.7937
800 800 C.V. 0.2176
1000 1000 n 63
1100 1100
900 900 Mult Factor = 1.20
1100 1100 Max. Value 1600.0
840 840 Max. Pred Cw 1920.0
1000 1000
1100 1100
1100 1100
1000 1000
700 700
700 700
1100 1100
1100 1100
1100 1100
800 800
800 800
600 600
800 800
1600 1600
1300 1300
1300 1300
900 900
1100 1100
1000 1000
900 900
1100 1100
1600 1600
1000 1000
900 900
1000 1000
900 900
1000 1000
900 900
1000 1000
900 900
900 900
1100 1100
900 900
900 900
1100 1100
900 900
700 700
700 700
700 700
800 800
800 800
900 900
1000 1000
800 800
700 700
600 600
900 900
800 800
700 700
800 800
800 800
700 700
800 800
700 700
700 700
-10-
26051 RPA-2011.xlsm, data
4/12/2011

REASONABLE POTENTIAL ANALYSIS
Data BDL=1/2DL Results
1 '<' 0.5 0.25 Std Dev.
2 <? 1 0.5 Mean
3 t> 5 2.5 C.V.
4 ,'4, 10 5 n
5 � <9i 10 5
6 <1 10 5 MuIt Factor =
ug/L 7 < 10 5 Max. Value
ug/L 8 . 10 5 Max. Pred Cw
9 e' 1.6 0.8
10 .<: 10 5
11 . 2 1
12 S 1.9 0.95
SPECIAL -
Values" WITH
"COPY"
2.1554
3.0000
0.7185
12
3.31
5.0 ug/L
16.6 ug/L
Date Data
1
2
3
4
5
7
8
9
10
11
12 L'
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
87
68
69
70
Mercury
BDL=1/2DL
1 0.5
1 0.5
1 0.5
1 0.5
1.19 1.19
1 0.5
2.4 2.4
1 0.5
1.25 1.25
1 0.5
1 0.5
1 0.5
1 0.5
1.95 1.95
1.76 1.78
1.15 1.15
1.68 1.68
1.51 1.51
1.38 1.38
1 1
1 0.5
1.09 1.09
1 0.5
1 0.5
1 0.5
1 0.5
1.78 1.78
1.05 1.05
1.5 1.5
1.76 1.76
1.95 1.95
1 0.5
1.98 1.98
1 0.5
1.38 1.38
1 0.5
1.98 1.98
1 0.5
1.38 1.38
1 0.5
1 0.5
1 0.5
1 0.5
1 0.5
1 0.5
1 0.5
1.09 1.09
1 0.5
1.03 1.03
1-77 1.77
1 0.5
1.2 1.2
1.91 1.91
1 0.5
1.15 1.15
1 0.5
1 0.5
1 0.5
1 0.5
1 0.5
1 0.5
3.25 3.25
1.3 1.3
1.13 1.13
Results
Std Dev. 0.6218
Mean 0.9758
C.V. 0.6373
n 64
Mult Factor =
Max. Value
Max. Pred Cw
SPECIA
Values"
"COP
1.64
3.3
5.3
-13-
26051 RPA-2011.xlsm, data
4/12/2011

REASONABLE POTENTIAL ANALYSIS
Da.c Data BDL=1/2DL Results
1 20 20 Std Dev.
2 18 18 Mean
3 40 40 C.V.
4 37 37 n
5 35 35
6 43 43 Mult Factor =
nj L 7 16 16 Max. Value
ny1L 8 20.2 20.2 Max. Pred Cw
9 41.9 41.9
10 29.7 29.7
11 11.7 11.7
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
SPECIAL -
Values" WITH
"COPY"
11.5230
28.4091
0.4056
11
2.12
43.0 ug/L
91.2 ug/L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
58
57
58
59
60
61
62
63
64
65
66
67
68
69
70
Date Data
BDL=1/2DL Results
3 1.5 Std Dev. 2.3517
2 2 Mean 4.3364
10 10 C.V. 0.5423
10 5 n 11
10 5
10 5 Mult Factor = 2.65
10 5 Max. Value 10.0
2.7 2.7 Max. Pred Cw 26.5
4.6 4.6
4.8 4.8
2.1 2.1
-16-
26051 RPA-2011.xlsm, data
4/12/2011

REASONABLE POTENTIAL ANALYSIS
ug/L
ug/L
- Date Data BDL=1!2DL Results
2 1 Std Dev. 1.9607
2 10 5 Mean 3.4208
3 2 1 C.V. 0.5732
4 10 5 n 12
5 10 5
6 10 5 Mult Factor = 2.69
7 10 5 Max. Value 5.0 ug/L
8 10 5 Max. Pred Cw 13.5 ug/L
9 3.4 1.7
10 10 5
11 2 1
12 2.7 1.35
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
Date Data BDL=1/2DL Results
1 0.5 0.25 Std Dev. 1.0735
2 5 2.5 Mean 1.6282
3 0.5 0.25 C.V. 0.6593
4 5 2.5 n 11
5 5 2.5
6 5 2.5 MultFactor= 3.17
7 5 2.5 Max. Value 2.500
8 5 2.5 Max. Pred Cw 7.925
9 0.02 0.01
10 0.9 0.9
11 1.5 1.5
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
-19-
26051 RPA-2011.xlsm, data
4/12/2011

REASONABLE POTENTIAL ANALYSIS
Zinc (AL)
Date Data BDL=1/2DL Results
1 134 134 Std Dev.
2 69 69 Mean
3 106 106 C.V.
4 83 83 n
5 64 64
6 91 91 Mult Factor =
ug/L 7 ? 52 52 Max. Value
ug/L 8 "ti 51 51 Max. Pred Cw
9 92 92
10 92 92
11 110 110
12 0� 146 146
13 121 121
14 tl' 131 131
15 111 111
16 107 107
17 111 111
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
SPECIAL -
Values" WITH
"COPY"
27.9637
98.2941
0.2845
17
1.57
146.0 ug/L
229.2 ug/L
26051 RPA-2011.xlsm, data
4/12/2011

NPDES/Aquifer Protection Permitting Unit Pretreatment Information Request Form
• PERMIT WRITER COMPLETES THIS PART:
Check all that apply
Date of Request
4/6/2011
municipal renewal
x
Requestor
Facility Name
Permit Number
Region
Basin
Sergei Chernikov
Triangle WWTP
N C0026051
Raleigh
Cape Fear
new industries
expansion
Speculative limits
stream reclass.
stream relocation
7Q10 change
other
check applicable PERCS staff:
CTB, CHO, LUM, NEW, ROA - Dana Folley (523)
HIW, LTN, NEU, YAD - Monti Hassan (371)
BRD, CPF, FRB, TAR - Sarah Morrison (208)
other
PERMIT WRITERS - AFTER you get this form
back from PERCS:
- Notify PERCS if LTMP/STMP data we said should
be on DMRs is not really there, so we can get it for
you (or NOV POTW).
- Notify PERCS if you want us to keep a specific
POC in LTMP/STMP so you will have data for next
permit renewal.
- Email PERCS draft permit, fact sheet, RPA.
- Send PERCS paper copy of permit (w/o NPDES
boilerplate), cover letter, final fact sheet. Email RPA
if changes.
Other Comments to PERCS:
PERCS PRETREATMENT STAFF COMPLETES THIS PART:
Status of Pretreatment Program (check all that apply)
1) facility has no SIU's, does have Division approved Pretreatment Program that is INACTIVE
2) facility has no SIU's, does not have Division approved Pretreatment Program
3) facility has Sills and DWQ approved Pretreatment Program (list "DEV" if program still under development)
3a) Full Program with LTMP
3b) Modified Program with STMP
4) additional conditions regarding Pretreatment attached or listed below
Flow, MGD
Industrial
Uncontrollable
Permitted
2.8126
Actual
1.7643
n/a
3.5357
Time period for Actual
June 2005-May 2006
June 2005-May 2006
STMP time frame:
Most recent:
Next Cycle:
POC in
LTMP!
STMP
Parameter of
Concern (POC)
Check List
POC due to
NPDES/ Non-
Disch Permit
Limit
Required
by EPA*
Required
by 503
Sludge**
POC due
to SIU***
POTW POC
(Explain
below)****
STMP
Effluent
Freq
LTMP
Effluent
Freq
X
BOD
L
M
4
Q M
X
TSS
L
L
4
Q M
X
NH3
L
L
4
Q M
X
Arsenic
X
M
4
Q M
-./
Cadmium
Ni
X
L
4
Q M
-/
Chromium
-./
L
4
Q M
-/
Copper
,%
X
L
4
Q M
X
Cyanide
L
4
Q M
Lead
J
X
L
4
Q M
X
Mercury
L
X
L
4
Q M
X
Molybdenum
X
M
4
Q M
,/
Nickel
.(
X
L
4
Q M
X
Silver
L
4
Q M
X
Selenium
X
M
4
Q M
j
Zinc
Ni
X
L
4
Q M
X
Total Nitrogen
L
L
4
Q M
X
Phosphorus
L
L
4
Q M
X
Fluoride
L
L
4
Q M
X
Chloride
L
4
Q M
Aluminum
M
4
Q M
COD
M
4
Q M
TTO
L
4
Q M
CBOD
L
4
Q M
Q = Quarterly
M = Monthly
all data on DMRs?
YES
NO (attach data)
data in spreadsheet?
YES (email to writer)
NO
X
*Always in the LTMP/STMP ** Only in LTMP/STMP if sludge land app or composte (dif POCs for incinerators)
*** Only in LTMP/STMP while SIU still discharges to POTW **** Only in LTMP/STMP when pollutant is still of concern to POTW
Comments to Permit Writer (ex., explanation of any POCs; info you have on IU related investigations into NPDES problems):
Durham County PIRF April 2011.xlsx
Revised: Jury 24, 2007

Location:
Station #:
Latitude:
Agency:
Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
NORTHEAST CRK AT SR 1102 SEDWICK RD NR RTP
B3300000
35.88702
UCFRBA
Time period:
Field
D.O. (mg/L)
pH (SU)
Longitude: -78.89943
01/30/2004 to 12/04/2008
Spec. conductance
(umhos/cm at 25°C)
Water Temperature (°C)
Other
TSS (mg/L)
Turbidity (NTU)
Nutrients (mg/L)
NH3 as N
NO2 + NO3 as N
TKN as N
Total Phosphorus
Metals (ug/L)
Aluminum, total (Al)
Arsenic, total (As)
Cadmium, total (Cd)
Chromium, total (Cr)
Copper, total (Cu)
Iron, total (Fe)
Lead, total (Pb)
Manganese, total (Mn)
Mercury, total (Hg)
Nickel, total (Ni)
Zinc, total (Zn)
# #
results ND EL
85 0 <4
85 0 <5
85 0 <6
85 0 >9
85 0 N/A
85 0 >32
60 0 N/A
60 0 >50
60 15 N/A
60 9 >10
60 1 N/A
60 3 N/A
23 0 N/A
23 23 >10
23 23 >2
23 22 >50
22 2 >7
23 0 >1000
23 21 >25
23 0 >200
13 13 >0.012
23 21 >25
23 10 >50
Hydrologic Unit Code: 03030002
Stream class: WS-IV NSW
NC stream index: 16-41-1-17-(0.7)
Results not meeting EL Percentiles
# % %Conf Min loth 25th 50th 75th 90th Max
23 27.1 100 0.8 2 3.6 5.5 7.9 10.1 12.7
35 41.2 100 0.8 2 3.6 5.5 7.9 10.1 12.7
1 1.2 6 6.6 6.8 6.9 7 7.2 7.8
0 0 6 6.6 6.8 6.9 7 7.2 7.8
83 123 144 173 216 273 619
0 0 2.5 5.9 12.6 19.6 24.8 26 28
4 5 7 12.5 23 52.4 150
7 11.7 75.2 7.6 12.2 16.4 23.7 37.6 59.6 128
0.02 0.02 0.02 0.05 0.1 0.14 0.26
0 0 0.02 0.02 0.04 0.07 0.14 0.24 3.59
0.2 0.31 0.5 0.7 0.9 1.2 2.3
0.01 0.04 0.06 0.08 0.1 0.14 0.52
167 183 510 853 1520 2126 3030
0 0 5 5 5 10 10 10 10
0 0 0.5 0.5 1 2 2 2 2
0 0 5 5 5 5 10 10 10
6 27.3 99.6 2 2 3 6 8 11 12
22 95.7 100 712 1050 1300 1620 2050 2926 3680
0 0 2 2 10 10 10 10 10
15 65.2 100 59 136 171 250 501 1147 1360
0 0 0.2 0.2 0.2 0.2 0.2 0.2 0.2
1 4.3 5 5 5 10 10 10 26
1 4.3 10 10 10 10 17 24 303
Fecal Coliform Screening(#/100mL)
# results: Geomean # >400: V. >400: %Conf:
60 175
16 27 92.3
Kev:
# result: number of observations
# ND: number of observations reported to be below detection level (non -detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence

0),t14,0'fin d
Location:
Station #:
Latitude:
Agency:
NORTHEAST CRK AT SR 1100 NR NELSON
B3660000
35.87243 Longitude: -78.91322
NCAMBNT
Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
_ OM�A
Ilydrologic Unit Code:
Stream class:
NC stream index:
03030002
WS-1V NSW
16-41-1-17-(0.7)
Time period: 01/13/2004 to 12/29/2008
# # Results not meeting EL Percentiles
results ND EL # % %Conf Min loth 25th 50th 75th 90th
Field
D.O. (mg/L)
pH (SU)
Salinity (ppt)
Spec. conductance
(umhos/cm at 25°C)
Water Temperature (°C)
Other
TSS (mg/L)
Turbidity (NTU)
Nutrients (mg/L)
NH3asN
NO2 + NO3 as N
TKN as N
Total Phosphorus
Metals (ug/L)
Aluminum, total (Al)
Arsenic, total (As)
Cadmium, total (Cd)
Chromium, total (Cr)
Copper, total (Cu)
Iron, total (Fe)
Lead, total (Pb)
Manganese, total (Mn)
Mercury, total (Hg)
Nickel, total (Ni)
Zinc, total (Zn)
Max
110 0 <4 1 0.9 3.7 5.1 5.5 6.6 8.1 9.4 11.7
110 0 <5 7 6.4 3.7 5.1 5.5 6.6 8.1 9.4 11.7
113 0 <6 0 0 6.4 6.5 6.7 7 7.4 7.5 7.7
113 0 >9 0 0 6.4 6.5 6.7 7 7.4 7.5 7.7
30 0 N/A 0.1 0.1 0.1 0.2 0.3 0.3 0.3
112 0 N/A 106 222 362 493 573 632 693
113 0 >32 0 0 4.5 9.1 12.6 17.7 22.6 25 26.9
102 10 N/A
60 0 >50
2.5 5 7.8 14 19 27.7 68
6 10 60.6 3.7 6.7 9.6 15 30 54.5 100
113 12 N/A 0.02 0.02 0.03 0.05 0.08 0.13 1.3
113 1 >10 10 8.8 0.02 0.43 0.8 1.8 3.6 9.74 29
113 0 N/A 0.22 0.73 0.86 0.98 1.1 1.3 2.4
113 0 N/A 0.09 0.13 0.19 0.33 0.62 1.26 1.8
13 0 N/A
13 13 >10
13 13 >2
13 13 >50
13 0 >7
13 0 >1000
13 13 >25
13 0 >200
12 12 >0.012
13 13 >25
13 0 >50
0 0
0 0
0 0
1 7.7
5 38.5 99.9
0 0
4 30.8 99.4
0 0
0 0
10 76.9 100
Fecal Coliform Screening(#/100mL)
# results: Geomean # > 400: % >400: %Conf:
60 143 8 13
290 298 430 640 915 1680 1800
5 5 5 5 8 10 10
1 1.4 2 2 2 2 2
10 16 25 25 25 25 25
2 3 3 4 5 7 8
380 408 480 620 1300 1420 1500
10 10 10 10 10 10 10
58 68 95 140 245 292 300
0.2 0.2 0.2 0.2 0.2 0.2 0.2
10 10 10 10 10 10 10
24 25 50 55 110 144 160
Key:
# result number of observations
# ND: number of observations reported to be below detection level (non -detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence

Ambient Monitoring System Station Summaries
NCDENR, Division of Water Quality
Basinwide Assessment Report
Location: NORTHEAST CRK AT SR 1731 0 KELLY CHURCH RD NR DURHAM
Station #: B3670000 Hydrologic Unit Code: 03030002
Latitude: 35.85550 Longitude: -78.93968 Stream class: WS-IV NSW
Agency: UCFRBA NC stream index: 16-41-1-17-(0.7)
Time period: 01/30/2004 to 12/04/2008
# # Results not meeting EL Percentiles
results ND EL # % %Conf Min loth 25th 50th 75th 90th Max
Field
D.O. (mg/L) 85 0 <4 0 0 4.2 5.6 6.7 7.4 8.8 10.5 13
85 0 <5 4 4.7 4.2 5.6 6.7 7.4 8.8 10.5 13
pH (SU) 85 0 <6 0 0 6.2 6.6 6.9 7.2 7.4 7.6 8.6
85 0 >9 0 0 6.2 6.6 6.9 7.2 7.4 7.6 8.6
Spec. conductance 85 1 N/A 77 145 208 403 546 610 666
(umhos/cm at 25°C)
Water Temperature (°C) 85 0 >32 0 0 4 8.1 12.9 21 25.1 26.9 29
Other
TSS (mg/L) 60 0 N/A 3 6 10 22.7 56 100.5 895
Turbidity (NTU) 60 0 >50 23 38.3 100 3.3 9.7 16.7 30.5 83.2 140.8 1070
Nutrients (mg/L)
NH3 as N 60 15 N/A 0.01 0.02 0.02 0.05 0.09 0.14 0.37
NO2 + NO3 as N 60 1 >10 1 1.7 0.02 0.17 0.53 1 2.57 6.08 19.8
TKN as N 60 1 N/A 0.2 0.5 0.7 0.9 1.08 1.49 1.8
Total Phosphorus 60 0 N/A 0.06 0.09 0.16 0.22 0.36 0.73 1.9
Metals (ug/L)
Aluminum, total (Al) 23 0 N/A 330 340 1060 1980 3600 6084 26500
Arsenic, total (As) 23 23 >10 0 0 5 5 5 10 10 10 10
Cadmium, total (Cd) 23 23 >2 0 0 0.5 0.5 1 2 2 2 2
Chromium, total (Cr) 23 21 >50 0 0 5 5 5 5 10 10 20
Copper, total (Cu) 22 2 >7 4 18.2 93.8 2 2 3 6 7 10 13
Iron, total (Fe) 23 0 >1000 18 78.3 100 466 565 1310 2200 3490 4742 19800
Lead,total(Pb) 23 20 >25 0 0 2 2 10 10 10 10 12
Manganese, total (Mn) 23 0 >200 11 47.8 100 45 77 108 148 316 556 782
Mercury, total (Hg) 21 12 >0.012 0 0 0.001 0.002 0.003 0.2 0.2 0.2 0.2
Nickel, total (Ni) 23 21 >25 0 0 5 5 5 10 10 10 17
Zinc, total (Zn) 23 1 >50 7 30.4 99.9 10 15 24 36 61 116 142
Fecal Coliform Screening(#/100mL)
4 results: Geomean # > 400: % > 400: %Coot:
60 189 17 28 95.7
Key:
# result: number of observations
# ND: number of observations reported to be below detection level (non -detect)
EL: Evaluation Level; applicable numeric or narrative water quality standard or action level
Results not meeting EL: number and percentages of observations not meeting evaluation level
%Conf : States the percent statistical confidence that the actual percentage of exceedances is at least 10% (20% for Fecal Coliform)
Stations with less than 10 results for a given parameter were not evaluated for statistical confidence

COUNTY OF DURHAM
ENGINEERING DEPARTMENT
UTILITY DIVISION
October 19, 2010
RETURN RECEIPT REQUESTED
CERTIFIED MAIL # 7008 1830 0004 1522 2227
Mrs. Dina Sprinkle
NCDENR/DWQ/NPDES
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Re: NC0026051 Permit Renewal Application
Dear Mrs. Sprinkle:
Please find enclosed the permit renewal application and two copies for the Durham County
Triangle Wastewater Treatment Plant, Permit # NC0026051. If you have any questions, please
contact me at [phone].
S,4ncerely,
Enclosures
cc: Stephanie Brixey, Compliance Manager
Rob Stewart, TWWTP Superintendant
JRP/SAB/cs
ty Division Manager/POTW Director
Er0_, @ D
OCT 212010
DENR-WATER QUALITY
POINT SOURCE BRANCH
TRIANGLE WASTEWATER TREATMENT PLANT
5926 NC Highway 55 East, Durham, N.C. 27713 • [phone] • Fax [phone]
Equal EmploymentiAffirmative Action Employer

This document and all attachments were prepared by Stephanie Brixey, Durham County
Compliance Manager. The information submitted is, to the best of my knowledge and belief,
true, accurate and complete.
03*NUj
Stephanie Brixey
Compliance Manager
i*DicgOla
Date

Summary of Submitted Biomonitoring Test
Date Report
Submitted to DWQ
Outfall
Number
Toxicity Test Type
Collection
Dates of
Samples
Dates of
Testing
Toxicity
Testing
Method Used
(*See
Footnote)
Summary of Results
3/24/2006
001
Chronic Ceriodaphnia dubia (Pass/Fail)
2/7/2006,
2/10/2006
2/7/2006 -
2/14/2006
*1
Pass (-9.09% Reduction)
6/30/2006
001
Chronic Ceriodaphnia dubia (Pass/Fail)
5/9/2006,
5/12/2006
5/10/2006 -
5/17/2006
*1
Pass (-1.87% Reduction)
9/18/2006
001
Chronic Ceriodaphnia dubia (Pass/Fail)
8/2/2006,
8/4/2006
8/2/2006 -
8/9/2006
*1
Pass (-12.79% Reduction)
12/30/2006
001
Chronic Ceriodaphnia dubia (Pass/Fail)
11/14/2006,
11/18/2006
11/15/2006 -
11/22/2006
*1
Pass (-3.54% Reduction)
3/29/2007
001
Chronic Ceriodaphnia dubia (Pass/Fail)
2/6/2007,
2/9/2007
2/7/2007 -
2/14/2007
*1
Pass (0.87% Reduction)
6/28/2007
001
Chronic Ceriodaphnia dubia (Pass/Fail)
5/8/2007,
5/11/2007
5/9/2007 -
5/16/2007
*1
Pass (-6.62% Reduction)
9/30/2007
001
Chronic Ceriodaphnia dubia (Pass/Fail)
8/14/2007,
8/17/2007
8/15/2007 -
8/22/2007
*1
Fail
10/24/2007
001
Chronic Ceriodaphnia dubia (Dilutions)
9/4/2007,
9/6/2007
9/5/2007 -
9/12/2007
*2
Dilutions Of 22.5%, 45%, 75%, 90%,
100% - Pass (ChV > 100%)
11/27/2007
001
Chronic Ceriodaphnia dubia (Dilutions)
10/2/2007,
10/7/2007
10/3/2007 -
10/10/2007
*2§
Dilutions Of 22.5%, 45%, 75%, 90%,
100% - Pass (ChV > 100%)
1/22/2008
001
Chronic Ceriodaphnia dubia (Dilutions)
12/10/2007,
12/14/2007
12/12/2007 -
12/29/2007
*2
Dilutions Of 45%, 67.5%, 90%, 95%,
100% - Pass (ChV > 100%)
3/19/2008
001
Chronic Ceriodaphnia dubia (Pass/Fail)
2/5/2008,
2/8/2008
2/6/2008-
2/13/2008
*1
Pass (13.63% Reduction)
6/26/2008
001
Chronic Ceriodaphnia dubia (Pass/Fail)
5/6/2008,
5/9/2008
5/7/2008 -
5/14/2008
*1
Pass (1.39% Reduction)
9/26/2008
001
Chronic Ceriodaphnia dubia (Pass/Fail)
8/5/2008,
8/8/2008
8/6/2008 -
8/13/2008
*1
Pass (10.51% Reduction)

12/19/2008
001
Chronic Ceriodaphnia dubia (Pass/Fail)
11/18/2008,
11/21/2008
11/19/2008-
11/26/2008
*1
Pass (6.99% Reduction)
3/24/2009
001
Chronic Ceriodaphnia dubia (Pass/Fail)
2/10/2009,
2/13/2009
2/11/2009-
2/18/2009
*1
Pass (-2.56% Reduction)
6/1/2009
001
Chronic Ceriodaphnia dubia (Pass/Fail)
5/12/2009,
5/15/2009
5/13/2009-
5/20/2009
*1
Pass (8.01% Reduction)
9/1/2009
001
Chronic Ceriodaphnia dubia (Pass/Fail)
8/11/2009,
8/14/2009
8/12/2009-
8/19/2009
*1
Pass (-12.26% Reduction)
12/10/2009
001
Chronic Ceriodaphnia dubia (Pass/Fail)
11/10/2009,
11/13/209
11/11/2009-
11/18/2009
*1
Pass (-17.02% Reduction)
3/4/2010
001
Chronic Ceriodaphnia dubia (Pass/Fail)
2/16/2010,
2/19/2010
2/17/2010-
2/24/2010
*1
Pass (-8.24% Reduction)
6/1/2010
001
Chronic Ceriodaphnia dubia (Pass/Fail)
5/11/2010,
5/14/2010
5/12/2010-
5/19/2010
*1
Pass (-21.24% Reduction)
6/1/2010
001
Chronic Fathead Minnow
(Multi -Concentration Test)
5/11/2010,
5/12/2010,
5/14/2010
5/11/2010 -
5/18/2010
*3
Dilutions Of 22.5%, 45%, 75%, 90%,
100% - Pass (ChV > 100%)
6/29/2010
001
Chronic Fathead Minnow
(Multi -Concentration Test)
6/8/2010,
6/9/2010,
6/11/2010
6/8/2010 -
6/15/2010
*3
Dilutions Of 22.5%, 45%, 75%, 90%,
100% - Pass (ChV > 100%)
8/25/2010
001
Chronic Fathead Minnow
(Multi -Concentration Test)
7/27/2010,
7/28/2010,
7/30/2010
7/27/2010 -
8/3/2010
*3
Dilutions Of 22.5%, 45%, 75%, 90%,
100% - Pass (ChV > 100%)
9/7/2010
001
Chronic Ceriodaphnia dubia (Pass/Fail)
8/10/2010,
8/13/2010
8/11/2010-
8/18/2010
*1
Pass (12.88% Reduction)
9/7/2010
001
Chronic Fathead Minnow
(Multi -Concentration Test)
8/10/2010,
8/11/2010,
8/13/2010
8/10/2010 -
8/17/2010
*3
Dilutions Of 22.5%, 45%, 75%, 90%,
100% - Pass (ChV > 100%)
*1 = "Pass/Fail Methodology for Determining Acute Toxicity in a Single Concentration" revised July 27, 1992 NCDWQ
*2 = "North Carolina Pase II Chronic Whole Effluent Toxicity Test Procedure" March 23, 1998
*3 = "Short -Term Methods for Estimating the Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms" 4th Edition,
EPA-821-R-02-013, October 2002. Method #1000.0
§ denotes that the result was invalid due to error in completion of Chain of Custody and hold time

Br-ixey, Stephanie
From: Pearce. Joseph R.
Sent: Friday, August 13, 2010 4:25 PM
To: Brixey, Stephanie; Mencome, Anthony L.
Subject: Fathead minnow test email.
We need to include a copy of this email in our NPDES permit application.
Joe
Joseph Pearce PE
Utility Division Manager
Durham County Engineering Department
[phone]
fax: [phone]
From: Moore, Cindy[mailto:[e-mail]]
Sent: Friday, August 13, 2010 3:02 PM
To: Pearce, Joseph R.
Subject: RE: test
oc,
Per our conversation today. You will need to complete 4 fish growth test prior to permit application. The application is
due in November. It is acceptable to do these every month until complete instead of on the regular quarterly basis.
Thanks
Cindy
From: [e-mail][mailto:[e-mail]]
Sent: Friday, August 13, 2010 3:00 PM
To: Moore, Cindy
Subject: test
Joseph Pearce PE
Utility Division Manager
Durham County Engineering Department
[phone]
fax: [phone]
"This message is being sent on a public e-mail system and may be subject to disclosure under the North Carolina Public
Records Act."
1

SIGNIFICANT
Supply
provide
INDUSTRIAL USER INFORMATION:
the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
the Information requested for each SIU.
F.3.
F.4.
F.5.
F.6.
F.7.
F.8.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Astro Pak Corporation
Mailing Address: 2410 Presidential Drive, Ste 114
Durham, NC 27703
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Cleaning and passivation process
Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): cleaning and passivation of new stainless steel piping and equipment for pharmaceutical and aerospace industries
Raw material(s): acids and alkaline cleaners
Flow Rate. (NO DISCHARGE from January 2007 to present.)
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
GPD ( continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
GPD ( continuous or intermittent)
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards, which category and subcategory?
40 CFR 433.17
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
Page 1

SIGNIFICANT INDUSTRIAL USER INFORMATION:
through F.8 and •
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3
provide the information requested for each SIU.
F.3.
F.4.
F.5.
F.6.
F.7.
F.8.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Cintas Corporation
Mailing Address: 1003 Twin Creek Court
Durham. NC 27703
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Operate industrial laundry
Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): commercial laundry
Raw material(s): detergents. builders, bleach and sour
Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system
day (GPD) and whether the discharge is continuous or intermittent.
55,000 GPD ( X continuous or intermittent)
in gallons per
collection system
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
2.500 GPD ( X continuous or intermittent)
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards 0 Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
Page 2

4pI6NIFICANT
Supply
provide
INDUSTRIAL USER INFORMATION:
the following Information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
the information requested for each SIU.
F.3.
F.4.
F.S.
F.6.
F.7.
F.B.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Cree Research, Inc. (Building 6)
Mailing Address: 4600 Silicon Drive
Durham NC 27703
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Develop and manufacture silicon carbide crystals
Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): LED chips and lighting devices
Raw material(s): solvents, abrasives, adhesives, surfactants, gases
Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
63,000 GPD ( X continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
78,000 GPD ( X continuous or intermittent)
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ® Yes 0 No
If subject to categorical pretreatment standards, which category and subcategory?
40 CFR 469 Subpart A & B
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
Page 3

SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3.
F.4.
F.S.
F.6.
F.7.
F.B.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Cree Research (Building 10)
Mailing Address: 4600 Silicon Drive
Durham, NC 27703
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Develop and manufacture silicon carbide crystals
Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): LED lighting components
Raw material(s): solvents, abrasives. adhesives, surfactants, gases
Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
350 GPD ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
14,000 GPD ( X continuous or intermittent)
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ® Yes 0 No
If subject to categorical pretreatment standards, which category and subcategory?
40 CFR 469 Subpart A & B
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets. interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
Page 4

.SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3.
F.4.
F.S.
F.6.
F.7.
F.B.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Cree RTP
Mailing Address: 4600 Silicon Drive
Durham, NC 27703
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Develop and manufacture silicon carbide crystals
Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): LED lighting components
Raw material(s): solvents, abrasives, adhesives, surfactants, gases
Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
16,000 GPD ( X continuous or _ intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
5,000 GPD ( X continuous or intermittent)
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards 0 Yes 0 No
If subject to categorical pretreatment standards, which category and subcategory?
40 CFR 469 Subpart A & B
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
Pape 5

SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU- If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and •
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: DuPont
Mailing Address: PO Box 13999
Research Triangle Park, NC 27709
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Metal finishing processes
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s)- developmental products (film conductors, resistors, di -electric paste)
Raw material(s)- metal powders, ceramic & glass polymers acids, thinners, monomers, carbon nanotubes
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
7.000 GPD ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
12 000 GPD ( X continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits
b. Categorical pretreatment standards
® Yes
® Yes
❑ No
❑ No
If subject to categorical pretreatment standards. which category and subcategory?
40 CFR 433 17
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets. interference) at the treatment works in the past three years?
❑ Yes 0 No If yes. describe each episode
Page 6

,SIGNIFICANT INDUSTRIAL USER INFORMATION:
Suriply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3.
F.4.
F.5.
F.6.
F.7.
F.8.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Eisai
Mailing Address: PO Box 14505
Research Triangle Park, NC 27709
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Pharmaceutical research and manufacturing
Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Aricept, Aciphex
Raw material(s): acids. butanol, starches, ethanol, glycerol, nitrogen, sucrose
Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
64,000 GPD ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
30,700 GPD ( X
continuous or intermittent)
Pretreatment Standards. Indicate whether the SIU is subject to the following.
a. Local limits
b. Categorical pretreatment standards
® Yes
® Yes
❑ No
❑ No
If subject to categorical pretreatment standards, which category and subcategory?
40 CFR 439 Subparts D & E
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode
Page 7

SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges
provide the information requested for each SIU.
to the treatment works, copy questions F.3 through F.8 and `�
F.3.
F.4.
F.5.
F.6.
F.7.
F.8.
Significant
as necessary.
Name:
Mailing
Industrial
Pharmaceutical
Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
GlaxoSmithKline
Address: PO Box 13398
Research Triangle Park, NC 27709
Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
research and development
Principal
discharge.
Principal
Raw
Flow
a.
b.
Pretreatment
a.
b
If subject
40 CFR
Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
product(s): R&D laboratories
material(s): organic and inorganic chemicals
Rate.
Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system
day (GPD) and whether the discharge is continuous or intermittent.
6.000 GPD ( X continuous or intermittent)
in gallons per
system
Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
229,000 GPO ( X continuous or intermittent)
Standards. Indicate whether the SIU is subject to the following:
Local limits ® Yes ❑ No
Categorical pretreatment standards ® Yes ❑ No
to categorical pretreatment standards, which category and subcategory?
439 Subpart E
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ❑ No If yes. describe each episode
Page 8

„SIGNIFICANT INDUSTRIAL USER INFORMATION:
n �
Su,elply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3.
F.4.
F.5.
F.6.
F.7.
F.8.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: IBM
Mailing Address: PO Box 12195
Research Triangle Park, NC 27709
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Development and data support
Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): no manufacturing; retail store solution product development, call & data center support, computer software development
Raw material(s): water treatment chemicals (biocides, acids, corrosion inhibitors)
Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
0 GPD ( continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
54,000 GPD ( X continuous or intermittent)
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes 0 No
b. Categorical pretreatment standards 0 Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
Page 9

SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges
provide the information requested for each SIU.
to the treatment works, copy questions F.3 through F.8 and
F.3.
F.4.
F.5.
F.6.
F.7.
F.8.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: JMC
Mailing Address: PO Box 12138
Research Triangle Park. NC 27709
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Electrochemical production process
Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): high purity chromium metal
Raw material(s): acids, salts, metals
Flow Rate.
a Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
750 GPD ( X continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
3.000 GPD ( X continuous or intermittent)
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ® Yes 0 No
If subject to categorical pretreatment standards, which category and subcategory?
40 CFR 433
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets. interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
Page 10

,SIGNIFICANT INDUSTRIAL USER INFORMATION:
• i Sply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary
Name: RTI (formerly NCIDEA)
Mailing Address PO Box 12194
Research Triangle Park. NC 27709
F.4. Industrial Processes. Describe al the industrial processes that affect or contribute to the SIU's discharge.
Semiconductor research and development and low scale manufacturing
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s). silicon wafer devices
Raw material(s): acids, bases, salts, metals, wafers, solvents, plating solutions, gases
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPM and whether the discharge is continuous or intermittent.
13.000 GPD ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
20.000 GPD ( X continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ® Yes ❑ No
If subject to categorical pretreatment standards. which category and subcategory?
40 CFR 469 Subpart A
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets. interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode
Page 11

SIGNIFICANT INDUSTRIAL USER INFORMATION:
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: SCM Metal
Mailing Address. PO Box 12166
Research Triangle Park, NC 27709
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Manufacture and process metal powders and brazing paste
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the Sills
discharge.
Principal product(s): copper, bronze, tin, copper oxide metal powders, brazing paste
Raw material(s): metals, acids, solvents, salts
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent
8.000 GPD I X continuous or intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
7 000 GPD ( X continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits
b Categorical pretreatment standards
® Yes
® Yes
❑ No
❑ No
If subject to categorical pretreatment standards, which category and subcategory?
40 CFR 471 Subpart J
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No
If yes. describe each episode
Page 12

_SIGNIFICANT INDUSTRIAL USER INFORMATION:
•
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Sumitomo Electric Lightwave
Mailing Address: PO Box 13445
Research Triangle Park, NC 27709
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Manufactures fiber optic cable
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s). fiber optic cable
Raw material(s): plastics, thread, glass fiber, polyacrylic acid tape
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
10.900 GPD ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
37,500 GPD ( X
continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following.
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ❑ Yes Z No
If subject to categorical pretreatment standards, which category and subcategory?
F.H. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the Sill caused or contributed to any problems (e.g.,
upsets. interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
Page 13

SIGNIFICANT INDUSTRIAL USER INFORMATION:
•
Supply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and 'T
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: United Therapeutics
Mailing Address: PO Box 14186
Research Triangle Park, NC 27709
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Pharmaceutical manufacturing
F.5. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): hypertension drugs
Raw material(s): sulfates. stearates acetates, acetone
F.6. Flow Rate. (NO DISCHARGE IN THE LAST YEAR.)
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
1.050 GPD ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
1,000 GPD ( X continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following
a. Local limits ® Yes 0 No
b. Categorical pretreatment standards ® Yes 0 No
If subject to categorical pretreatment standards, which category and subcategory'?
40 CFR 439 Subpart D & E
F.8. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No
If yes, describe each episode.
Page 14

•
SIGNIFICANT INDUSTRIAL USER INFORMATION:
Suaply the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
provide the information requested for each SIU.
F.3. Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works Submit additional pages
as necessary.
Name: Biogen Idec
Mailing Address: 5000 Davis Drive
Research Triangle Park, NC 27709
F.4. Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Biotechnological processes
F.S. Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): Avonex, Amevive Tysabri
Raw material(s): acids, bases. salts solvents
F.6. Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
80.000 GPD ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
43,000 GPD ( X continuous or intermittent)
F.7. Pretreatment Standards. Indicate whether the SIU is subject to the following.
a. Local limits ® Yes ❑ No
b. Categorical pretreatment standards ❑ Yes ® No
If subject to categorical pretreatment standards, which category and subcategory?
F.B. Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets: interference) at the treatment works in the past three years?
❑ Yes ® No
If yes, describe each episode
Page 15

• a r
SIGNIFICANT
Supply
provide
INDUSTRIAL USER INFORMATION:
the following information for each SIU. If more than one SIU discharges to the treatment works, copy questions F.3 through F.8 and
the information requested for each SIU.
F.3.
F.4.
F.S.
F.6.
F.7.
F.B.
Significant Industrial User Information. Provide the name and address of each SIU discharging to the treatment works. Submit additional pages
as necessary.
Name: Diosynth RTP
Mailing Address: 6051 George Watts Hill Drive
Research Triangle Park. NC 27709
Industrial Processes. Describe all the industrial processes that affect or contribute to the SIU's discharge.
Pharmaceutical manufacturing
Principal Product(s) and Raw Material(s). Describe all of the principal processes and raw materials that affect or contribute to the SIU's
discharge.
Principal product(s): biological therapeutic proteins, tablet manufacturing
Raw material(s): acids. salts, bases. solvents
Flow Rate.
a. Process wastewater flow rate. Indicate the average daily volume of process wastewater discharge into the collection system in gallons per
day (GPD) and whether the discharge is continuous or intermittent.
73,000 GPD ( continuous or X intermittent)
b. Non -process wastewater flow rate. Indicate the average daily volume of non -process wastewater flow discharged into the collection system
in gallons per day (GPD) and whether the discharge is continuous or intermittent.
17,000 GPD ( X continuous or intermittent)
Pretreatment Standards. Indicate whether the SIU is subject to the following:
a. Local limits ® Yes 0 No
b. Categorical pretreatment standards 0 Yes 0 No
If subject to categorical pretreatment standards. which category and subcategory?
Problems at the Treatment Works Attributed to Waste Discharge by the SIU. Has the SIU caused or contributed to any problems (e.g.,
upsets, interference) at the treatment works in the past three years?
❑ Yes ® No If yes, describe each episode.
Page 16
•

• 44 h •
Sludge Management Plan Narrative
Durham County is currently sending waste activated sludge to a 5 acre lagoon. Durham County
has a contract with Bionomics for sludge removal. The contract includes dredging from the
lagoon, dewatering on site, and hauling dewatered sludge to a composting facility permitted by
the state for this purpose. Durham County is not using land application for the disposal of sludge
at this time.
The Phase III Biosolids Facility will provide for liquid waste activated sludge storage, a
dewatering facility, and a truck loading station for transport of sludge cake to a contract sludge
stabilization operation. The project was scheduled to be placed on-line in the Summer of 2011.
Due to delays in approval at DWQ — CG&L, the project may be delayed as much as a year.
Name and Official Title
Signature
Date
Joseph Pearce, Utility Division Manager