NC0048879_Permit (Issuance)_20030902

NPDES DOCUHENT SCANNING COVER SHEET
NPDES Permit:
NC0048879
Cary North WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
September 2, 2003
This document is printed on reuse paper - ignore any
content on the relrerse side

_4
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Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
Mr. Robert P. Bonne
Utilities Director
P.O. Box 8005
Cary, North Carolina
Dear Mr. Bonne:
27512-8005
September 2, 2003
Subject: Issuance of NPDES Permit NC0048879
North Cary WRF
Wake County
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 May 9, 1994 (or as subsequently amended).
This final permit addresses the comments provided in your August 25, 2003 letter with the Division's
responses summarized below.
➢ Reference to belt thickeners and sludge digesters has been included in the treatment process description
on the Supplement to Permit Cover Page.
➢ Item #2 on the Supplement to Permit Cover Page has been rewritten to read, "Operate facilities for
reclaimed water distribution in accordance with Non -Discharge Permits WQ0017064 and
WQ0017923."
➢ The typographical error in item #1 of the Supplement to Permit Cover Page has been corrected to read
"grit and grease".
➢ The NPDES Unit confirms that the use of Effluent Nutrients Worksheet currently in use by Cary
operating staff is an official component of the monthly DMR.
➢ Footnote #2 on the' 1u0t;,,Limitations and Monitoring Page has been modified to read CBOD5 in
lieu of BOD5.
➢ The effluent limitation and monitoring requirement for total residual chlorine has been deleted.
Y The condition requiring the Town to limit floating solids and visible foam in the effluent to trace
amounts is standard in NPDES permits nationwide. It is intended to address ascetic concerns not
necessarily covered by other conditions in the permit. The Division is working with US EPA and the
North Carolina Attorney General's Office to review this condition for possible modification or
deletion.
➢ Condition A. (8) Effluent Pollutant Scan has been modified to read, "The annual effluent pollutant scan
samples shall represent seasonal (summer, winter, fall, spring) variations over the 5-year permit cycle."
➢ Condition A. (6) Clarification of Compliance When a Permit Limit is Set at or Below Minimum Levels
has been added to the permit.
➢ As stated in Section A of Part II of the permit, the constant time/constant volume composite sampling
method requires prior approval by the Director. Such approval should be obtained from staff at the
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES

Issuance of Permit NC0048879
North Cart WRF
Page 2
Division's Raleigh Regional Office. Furthermore, the 24-hour time period is implicit in the 15%
variation clause in the aforementioned part.
➢ The Town may continue to sample in accordance with the schedule indicated in the comment letter.
Specifically, the Division acknowledges that the Town starts the first day of the weekday on Sunday at
7:00 a.m. and continues through Monday at 7:00 a.m.
➢ Part I1, Section E, 5 (b) regarding the submittal of additional monitoring applies only to monitoring
conducted on the final effluent. Monitoring conducted upstream of any process unit is considered
operation and control monitoring and is not reportable.
Additionally, please note that method detection limits (MDL) and minimum levels (ML) should be the most
sensitive as provided by the appropriate analytical procedure.
Compliance with all terms and conditions of the attached permit is the responsibility of the Permittee.
Please note that T15A 08G .0204 of the North Carolina Administrative Code has been interpreted to mean that the
Operator in Responsible Charge is responsible for operation of water pollution control systems.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable
to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following receipt of
this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North
Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh,
North Carolina 27699-6714). Unless such demand is made, this permit 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, Coastal Area Management Act, or any other Federal or Local governmental permits which may be
required.
If you have any questions or need additional information, please do not hesitate to contact Mark McIntire
of my staff at [phone], extension 508.
Sincerely,
ORIGINAL SIGNED BY
Mark McIntire
Alan W. Klimek, P.E.
cc: Central Files
NPDES Unit Files
Raleigh Regional Office
Aquatic Toxicology Unit
Madolyn Doming, EPA Region 4

Permit N(;o1)48879
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, the
Town of Cary
is hereby authorized to discharge wastewater and stormwater from a facility located at the
North Cary Water Reclamation Facility
1900 Old Reedy Creek Road
Cary
Wake County
to receiving waters designated as Crabtree Creek in the Neuse River Basin in accordance
with effluent limitations, monitoring requirements, and other conditions set forth in Parts I,
II, III and IV hereof.
The permit shall become effective October I, 2003.
This permit and the authorization to discharge shall expire at midnight on February 29, 2008.
Signed this day September 2, 2003.
Alan W. Klimek, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0048879
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked, and as of this 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.
The Town of Cary is hereby authorized to:
1. Continue operation of a 12.0 MGD water reclamation facility that includes
the following components:
> Mechanical screening
> Influent pump station
> Grit and grease removal system
> Nutrient removal system consisting of anaerobic selectors, oxidation
ditches, anoxic zones and reaeration zones
> Dual secondary clarifiers
> Deep -bed sand filters
> Ultraviolet disinfection
> Cascade aeration
> Belt thickeners
> Sludge digesters
This facility is located at the North Cary Water Reclamation Facility (1900
Old Reedy Creek Road, Cary) in Wake County.
2. Operate facilities for reclaimed water distribution in accordance with Non -
Discharge Permits WQ0017064 and WQ0017923.
3. Discharge from said treatment works at the location specified on the
attached map into Crabtree Creek, a class B-NSW water in the Neuse River
Basin.

NC0048879 - North Cary WRF
Latitude:
Longitude:
Ouad #:
Stream Class:
Receiving Stream:
Permitted Flow:
35°50' 16"
78°46'50"
Cary, N.C.
B-NSW
Crabtree Creek
12.0 MGD
Sub -Basin:
03-04-02
tIORTH
Town of Cary
Wake County

Permit NC0048879
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting until expiration, the Pcrmittee is authorized to discharge
treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified
below:
PARAMETER
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location 1
Flow
12.0 MGD
Continuous
Recording
Influent or Effluent
Total Monthly Flow (MG)
Monitor & Report
Monthly
Recorded or
Calculated
Influent or Effluent
CBOD5 (Summer)2.3
4.1 mg/L
6.0 mg/L
Daily
Composite
Influent & Effluent
CBOD5 (Winter)2.3
8.2 mg/L
12.3 mg/L
Daily
Composite
Influent & Effluent
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
Influent & Effluent
NH3 as N (Summer)3
0.5 mg/L
1.5 mg/L
Daily
Composite
Effluent
NH3 as N (Winter)3
1.0 mg/L
3.0 mg/L
Daily
Composite
Effluent
Dissolved Oxygen
Daily average not less than 5.0 mg/L
Daily
Grab
Effluent
Fecal Coliform
200/100 mi
400/100 ml
Daily
Grab
Effluent
Temperature
Daily
Grab
Effluent
TKN (mg/L)
Monitor & Report
Weekly
Composite
Effluent
NO3-N + NO2-N (mg/L)
Monitor & Report
Weekly
Composite
Effluent
TN (mg/L)4
Monitor & Report
Weekly
Composite
Effluent
TN Loads
Monitor & Report
143,246 pounds per years
Monthly
Annually
Calculated
Calculated
Effluent
Effluent
Total Phosphorus
2.0 mg/L (quarterly average)?
Weekly
Composite
Effluent
pH
Between 6.0 and 9.0 Standard Units
Daily
Grab
Effluent
Chronic Toxicity8
Quarterly
Composite
Effluent
Footnotes:
1. See condition A. (2) of this permit for instream monitoring requirements. Daily shall be defined as Monday through Friday
excluding weekends and legal holidays per NCAC 2B .0503(5).
2. The monthly average CBOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent
value (85% removal).
3. Summer shall be defined as April 1 — October 31 with winter defined as the balance of the year.
4. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is total nitrogen, TKN is total Kjeldahl
Nitrogen, and NO3-N and NO2-N are nitrate and nitrite nitrogen, respectively.
5. TN load is the mass quantity of total nitrogen discharged in a given time period. See condition A. (3) of this permit.
6. The annual TN load limit shall become effective with the calendar year beginning on January 1, 2003. Compliance with this
limit shall be determined in accordance with condition A. (4) of this permit.
7. The quarterly average for total phosphorus shall be the average of composite samples collected during each calendar quarter
(January - March, April - June, July - September, October - December).
8. Chronic Toxicity (Ceriodaphnia) @ 90%, February, May, August, November; see condition A. (5) of this permit.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0048879'
A. (2) INSTREAM MONITORING REQUIREMENTS
Instream monitoring is required for the following parameters at the locations specified:
Parameter
Sample Type
Location'
CBOD5
Grab
U,D,s
NH3 as N
Grab
U,D1.3
Dissolved Oxygen
Grab
U,D1-3
Temperature
Grab
U,D1-3
pH
Grab
D2
Footnotes:
1 U: Upstream immediately below dam release. Di: Downstream at Ebenezer Church Road. D2: Downstream between U.S. 1
and Lassiter Mill Dam. D3: Downstream at New Hope Road. Stream samples shall be collected three times per week during
the months of June, July, August, and September and weekly during the remainder of the year. As a participant in the Lower
Neuse Basin Association, Inc. (LNBA), the subject facility is not responsible for conducting the instream monitoring
requirements summarized above. Should your membership in the Association be terminated, the Division shall be
immediately notified and all instream monitoring requirements will be immediately reinstated. Locations U and Di are not
monitored under the LNBA agreement with the Division
A. (3) CALCULATION OF TOTAL NITROGEN LOADS
(1) The Permittee shall calculate monthly and annual TN loads as follows:
(a) Monthly TN load (pounds/month) = TN x TMF x 8.34
where:
TN = the average total nitrogen concentration (mgfL) of the composite samples collected during the month
TMF = the total wastewater flow discharged during the month (MG/month)
8.34 = conversion factor, from (mg/L x MG) to pounds
(b) Annual TN load (pounds/year) = Sum of the 12 monthly TN loads for the calendar year.
(2) The Permittee shall report monthly total nitrogen results (mg/L and pounds/month) in the discharge
monitoring report for that month and shall report each year's annual results (pounds/year) in the December
report for that year.
A. (4) ANNUAL LIMITS FOR TOTAL NITROGEN
(1) Total Nitrogen (TN) allocations and TN Load limits for NPDES dischargers in the Neuse River basin are
annual limits and are applied for the calendar year.
(2) For any given calendar year, the Permittee shall be in compliance with the annual TN Load limit in this
Permit if:
(3)
(a) the Permittee's annual TN Load is less than or equal to said limit, or
(b) the Permittee is a Co-Permittee Member of a compliance association.
The TN Load limit in this Permit (if any) may be modified as the result of allowable changes in the
Permittee's TN allocation.

Permit NC0048879
(a) Allowable changes include those resulting from purchase of TN allocation from the Wetlands Restoration Fund;
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 Load limit in this Permit to reflect allowable changes in its TN
allocation. Upon receipt of timely and proper application, the Division will modify the permit as appropriate and in
accordance with state and federal program requirements.
(c) Changes in TN 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.
(d) Application shall be sent to:
(b)
NCDWQ / NPDES Unit
Attn: Neuse River Basin Coordinator
Mail Service Center
Raleigh, NC 27699-16 1 7
(4) If the Permittee is a member and co-permittee of an approved compliance association, its TN discharge
during that year is governed by that association's group NPDES permit and the TN limits therein.
(a) 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 allocations will be updated annually and in accordance with state and federal
program requirements.
(c) 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.
(1) Upon receipt of timely and proper notification, the Division will modify the permit as appropriate and in
accordance with state and federal program requirements.
(ii) Membership changes in a compliance association become effective on January 1 of the year following
modification of the association's permit.
The TN monitoring and reporting requirements in this Permit remain in effect until expiration of this Permit
and are not affected by the Permittee's membership in a compliance association.
(5)
(b)
A. (5) CHRONIC TOXICITY PERMIT LIMIT (Quarterly)
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.

•
Permit NCOO4$879
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, D\VQ Form AT-3 (original) is to be sent to the
following address:
Attention:
NC DENR / D\VQ / Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch 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 Floyd' in the
comment area of the form. The report shall be submitted to the Environmental Sciences Branch 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.
A. (6) Clarification of compliance when a permit limit is set at or below minimum levels
a. The following definitions apply to this permit:
1. The Minimum Level (NIL) is defined as the concentration in a sample that is equivalent to the concentration of the
lowest calibration standard analyzed by a specific analytical procedure.
2. The Method Detection Limit (MDL) is defined as the minimum concentration of an analyte that can be measured
and reported with 99 percent confidence that the analyte concentration is greater than zero, as determined by a
specific analytical procedure.
b. In cases where the permit limit for a parameter is set at or below the Minimum Level (ML) for that
parameter as defined above and the measurement for that parameter is less than the ML, the permittee shall
be considered to be in full compliance with the permit if the value reported on the discharge monitoring
report for that parameter is less than the ML.
A. (7) Clarification of Monitoring Requirements
In accordance with 15A NCAC 2B .0505 (c)(4), stream sampling may be discontinued when flow conditions or
extreme weather conditions could result in injury or death of the person(s) collecting the samples. In such cases, on
each day that sampling is discontinued, written justification for the discontinuance shall be specified in the monitoring
report for the month in which the event occurred. This provision also applies to influent and effluent sampling.

Permit NC0048879
A. (8) EFFLUENT POLLUTANT SCAN
The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table below (in
accordance with 40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal (summer,
winter, fall, spring) variations over the 5-rear permit cycle. Unless otherwise indicated, metals shall be analyzed as
"total recoverable." Additionally, the method detection level and the minimum level shall be the most sensitive as
provided by the appropriate analytical procedure.
Ammonia (as N) Trans-1 ,2-dichloroethylene Bis (2-chloroethyl) ether
Chlorine (total residual, TRC) 1, I -dichloroethylene Bis (2-chloroisopropyl) ether
Dissolved oxygen 1,2-dichloropropane Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Total Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Total Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1, I ,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1, I , 1-trichloroethane 1,2-dichlorobenzene
Cadmium 1, I ,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-creso Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol I ,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: lsophorone
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. A copy of the report shall be submitted to Central Files to the following address:
Division of Water Quality, Water Quality Section, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.

18/07/2003 11:09 9195289839
PAGE 02
North Carolina Wildlife Resources Commission
Charles R. Fullwood, Executive Director
MEMORANDUM
TO: Mark McIntire, NPDES Unit
sion ofWater
FROM: IianielTe R. Ponder, Piedmont Region Coordinator
Habitat Conservation Program
DATE: 7 August 2003
SUBJECT: Proposed Permit Renewal for the Town of Cary. (North Cary Water Reclamation
Facility), Wake County, NPDES Permit No. NC0048879
Biologists with the North Carolina Wildlife Resources Commission have reviewed the
subject application for impacts to fish and wildlife. Our comments are provided in accordance
with provisions of the Clean Water Act of 1977 (as amended), the Fish and Wildlife
Coordination Act (48 Stat. 401, as amended; I6 U.S.C. 661-667d), North Carolina General
Statutes (G.S. 113-131 et seq.), and thc North Carolina Administrative Code 15A NCAC
101.0102.
The applicant has submitted a request for a permit renewal to discharge treated
wastewater into Crabtree Creek in the Neuse River basin. It is our understanding that this plant
utilizes chlorine in their treatment system, along with UV treatment. Chlorine is acutely toxic to
aquatic organisms and forms secondary compounds that are also detrimental to aquatic life. In
addition, the dechlorination agent, hydrogen disulfide, is also very toxic to aquatic life. We are
especially concerned with impacts of this project on the sensitive species that are found in this
system.
In Crabtree Creek there are numerous records for the presence of rare species
downstream of the project. These species include the federal species of concern and state
endangered Atlantic pigtoc (Fusconaia masoni), the federal species of concern and state
significantly rarc pinewoods shiner (Lythrurus matutinus), the state threatened creeper
(Strophitus undulates) and triangle floater (Alasmidonta undulata), and thc state special concern
notched rainbow (Villosa constricta). In addition, there are spawning runs of blueback herring
(Alosa aestivalis), hickory shad (Alosa mediocris), alewife (Alosa pseudoharengus), American
shad (Alosa sapidissirna), and striped bass (Morone saxatilis).
We recommend that the following conditions be incorporated into the permit to reduce
impacts to fish and wildlife resources and in particular to listed species.
Mailing Address: Division of Inland Fisheries - 1721 Mail Service Ccnrer • Raleigh, NC 27699-1721
Telephone: [phone] eat. 281 • Fax: [phone]

N07/2003 11:09 9195289839 PAGE 03
Page 2
7 August 2003
N. Cary Water Reclamation. Facility
NPDES No. NC0048879
1. We request that ozone or ultraviolet light systems replace the chlorine systems. These
disinfectants also provide an additional benefit of removing a hazardous material from.
the workplace.
2. If not already in place, we suggest the installation of a stand-by power system.
Thank you for the opportunity to provide input during the planning stages for this project.
If we can be of further assistance, please contact our office at [phone].
cc: Garland Pardue, USFWS
E-mail: Sarah Kopplin, NHP

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA, GEORGIA 30303-8960
August 19, 2003
Mr. Mark McIntire, P.E.
North Carolina Department of Environment
and Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJ: Town of Cary - North WWTP
NPDES No. NC0048879
Dear Mr. McIntire:
In accordance with the EPA/NCDENR MOA, we have completed review of the permit
referenced above and have no objections to the draft permit conditions. We request that we be
afforded an additional review opportunity only if significant changes are made to the permit prior
to issuance, or if significant comments regarding the draft permit are received. Otherwise, please
send us one copy of the final permit when issued.
If you have any questions, please call me at [phone].
Sincerely,
Madolyn S. Dominy, Environme al Engineer
Permits, Grants and Technical Assistance Branch
Water Management Division
Internet Address (URL) • http:/lwww.epa.gov
Recycled/Recyclable • Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30% Postconsumer)

PUBLIC WORKS AND UTILITIES
25 August 2003
£00Z , Z 90W
Mr. David A. Goodrich, Supervisor
NPDES Unit
North Carolina Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
RE: NPDES Permit Issuance - Permit No. NC0048879
North Cary Water Reclamation Facility, Wake County
Dear Mr. Goodrich:
The Town of Cary received the subject final permit on 24 July 2003 for the North Cary Water
Reclamation Facility (WRF). We have carefully reviewed the permit and we respectfully request
the following modifications to the draft permit.
Supplement to Permit Cover Sheet
cji,-1. The belt thickeners and sludge digesters were eliminated from the treatment process description.
Please add these two treatment processes to the description.
2. Cary requests that Item #2 be rewritten to include the reclaimed water distribution system:
"Operate facilities for reclaimed water distribution in accordance with Non -Discharge Permits
No. WQ0017064 and WQ0017923."
64_
3. Item #1 contains a typographical error. The "grit and great" removal system should be modified
to read "grit and grease" removal system.
Condition A. (1)
1. The Town of Cary wishes to formally document the decrease in the total nitrogen load at the
North Cary WRF. A letter from the Town of Cary, attached to this response to the draft permit,
documents the historical decrease in total nitrogen load over the past several years.
Cary requests that the NPDES Unit confirm that the use of the Effluent Nutrients Worksheet,
currently in use by operating staff, is an official component of the monthly DMR.
Footnote #2 should be changed to read CBOD5 in lieu of BOD5.
A daily maximum chlorine limit continues to be included in the North Cary WRF permit even
though the use of chlorine has been permanently removed from this facility. The use of
TOWN OfCARY
400 James Jackson Avenue • Cary, NC 27513 • PO Box 8005 • Cary, NC 27512-80015�1
tel [phone] • fax [phone] • www.townofcary.org

chlorine disinfection was replaced with an ultraviolet light (UV) disinfection system in July
1997. Currently, the plant's chlorination capabilities are limited to on -site and off -site reuse
streams. We request that the daily maximum chlorine limit of 17 ug/1 and the monitoring
requirement be removed from the permit.
/r 5. Cary strongly feels that the sentence, "There shall be no discharge of floating solids of visible
foam in other than trace amounts", leaves the Town vulnerable to unfavorable potential third -
party actions. The statement, "trace amounts", is ambiguous and misleading. Therefore, Cary
requests that this sentence be removed from the permit.
et -
Special Condition A. (8): Effluent Pollutant Scan
The effluent pollutant scan description contains the ambiguous sentence, "Samples shall represent
seasonal variations." Cary requests that this phrase be rewritten to clarify the meaning of this
requirement: "The annual effluent pollutant scan samples shall represent seasonal (summer, winter,
fall, spring) variations over the 5-year permit cycle."
Former Special Condition A. (4)
Special Condition A. (4) contained in the former NPDES permit clarified compliance when a permit
limit is set at or below a minimum level. This condition was removed in the current draft permit.
Cary recognizes that toxicant permit limits are not contained in this draft permit; however, this
special condition is protective and may provide guidance for future issues. Therefore, we request
that this special condition be put back into the permit.
Standard Condition Part II, Section A
1. Cary would like to clarify the definition of a composite sample under the constant time/constant
volume condition in Section A. Section A in Part II states that use of the constant time/constant
volume composite sampling method requires prior approval by the Director. Cary has instructed
operating personnel to implement this method as standard operating procedure under the
condition specified in this definition. We request approval for use of this composite sampling
method under the conditions specified so as to avoid a telephone call to the Director. If the
NPDES Unit will not provide prior approval for use of this method, please provide the Town
with the appropriate contact information.
Additionally, we request clarification of the sentence, "This method may only be used in
situations where effluent flow rates vary less than 15 percent." Cary requests that this sentence
be rewritten to include the phrase, "over a 24-hour period".
2. Cary requests clarification of the Daily Sampling definition in Part II, Standard Conditions. The
cYN/tw
� Town of Cary starts the first day of the weekday on Sunday at 7 a.m. and continues through
Monday at 7 a.m. Cary requests permission to continue sampling in this manner.

Standard Condition Part II, Section E, 5 (b)
Section E, Part II pertains to reporting requirements. Specifically, 5 (b) states that if the Permittee
011 monitors any pollutant more frequently that required by the permit, the results of such monitoring
te414'
shall be included in the calculation and reporting of the data submitted on the DMR. Cary requests
clarification that process sampling (defined as samples taken upstream of disinfection) for operation
and control of plant processes are not reportable on the DMR.
Additional Comments
Cary requests that the official Town definition of "legal" with respect to holidays be attached to this
letter response to the draft permit. The Town wishes to go on the official record for the definition of
a legal holiday to protect against possible future third -party actions.
If you have any questions or concerns, please do not hesitate to call me at 469-4303 or Mary Sadler
with ARCADIS, our consulting engineer, at 854-1282.
Sincerely,
Robert P. Bonne
Utilities Director
Enclosures
cc: William B. Coleman, Jr., Town Manager
Robert K. Fisher, P.E., Director of Public Works and Utilities
Leon M. Holt, Pretreatment Inspector, Dept. of Public Works and Utilities
Cecil Martin, South Cary Water Reclamation Facility Superintendent
Mary Sadler, P.E., ARCADIS
Mark McIntire, P.E., DWQ NPDES Unit

08'/ 07/ 2003 12: 51 919-662-8118
SOUTH CARY WATER FAC PAGE 02/02
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Hohoax), Secretary
Kerr T. Stevens, Director
NCDENR
NORTH CAROLINA DE"PARTVIENT OF
ENVIRONMENT AND NATURAL RESOURCES
November 8, 2000
Kelly Spainhour, Laboratory Supervisor
South CaryWRF
Town of Cary
4900 West Lake Road
Apex, North Carolina 27502
Subject: Legal Holidays for Monitoring Purposes
Soli Cary WRF •
NPDES Permit NC0065102
Wake County
Dear Ms. Spainhour:
As discussed over the telephone on Tuesday, November 7, 2000, the Division of Water Quality
does not establish nor set legal holidays to be followed by NPDES permitted facilities for
purposes of monitoring discharge wastewater treatment facilities. The Division leaves the
decision of setting officially observed holidays to each NPDES permit holding authority.
If further assistance is needed in this matter, please feel free to contact Vanessa Manuel at
919/733-5083, extension 532.
E. Shannon Langley, Supervi =r
Point Source Compliance/Enforcement Unit
Cc: Raleigh Regional Office — DWQ
Joe Corporon, NPDES Unit
1617 Mail Service Center, Raleigh, N. C. 27699-1617 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer 50 % recycled/10 % post -consumer paper

Mr. David A. Goodrich, Supervisor
NPDES Unit
North Carolina Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
RE: History of Total Nitrogen Allocation Reduction
North Cary Water Reclamation Facility, Wake County
Dear Mr. Goodrich:
PUBLIC WORKS AND UTILITIES
£OOZ 9 Z 9f1d
25 August 2003
J
j
The North Cary Water Reclamation Facility (WRF) is required to reduce total nitrogen per the Neuse River
Nutrient Management Strategy (NMS) adopted in December of 1997. However, the total nitrogen load to
the North Cary WRF has gradually been decreased in the last two permit cycles. The purpose of this letter is
to formally document the Town of Cary's understanding of the issues surrounding the decrease in the total
nitrogen allocation at the North Cary WRF. It is our understanding that the decrease in total nitrogen is
primarily due to the calculation and recalculation of flow and load allocated to minor dischargers in the
Neuse (minor dischargers are defined as having a permitted flow less than 0.5 mgd). In 1997, the Town of
Cary began treating all of the wastewater flow from two minor dischargers in the Neuse: Aviation Parkway
and Perimeter Park Wastewater Treatment Plants (WWTP). Both facilities were owned by the Town of
Morrisville and decommissioned in 1997.
The original Neuse Rule adopted in December 1997 allocated'280,000 lb/year of total nitrogen to the minor
dischargers in the Neuse Basin. This allocation was based on an average effluent concentration of 18.0 mg/L
total nitrogen for the minor facilities. The Rule also provided that when minor facilities were taken off-line,
the receiving facility's nitrogen load would be increased by using most recent effluent nitrogen data in
conjunction with the connected facility's permitted flow. Shortly after the 1997 rule was adopted, a number
of errors were found. These errors were such that the reduction of TN at the estuary would meet a 24%
reduction instead of the required 30% reduction. Over the ensuing two years, corrections and adjustments
were made via negotiations with the LNBA, the Group Compliance Association, and various other
stakeholders.
In June 1999, a revised rule was adopted. This version also allocated 280,000 lbs/year to all minors and
maintained the language regarding load augmentation resulting from connection of facilities. However, after
adoption of this rule, it was determined that these modifications would still not achieve the required 30%
reduction.
In an attempt to achieve the 30% reduction, the average concentration of 18.0 mg/L for minors was revised
to 10.0 mg/L in the February 2000 Neuse Rule. Using this concentration and the cumulative flow from all
minor facilities (5.1 mgd), an allowable cumulative load for all minors of 155,400 lb/year was re -calculated,
replacing the 280,000 lb/year previously established. This strategy was presented to the Environmental
TOWN OfCARY
400 James Jackson Avenue • Cary, NC 27513 • PO Box 8005 • Cary, NC 27512-80'
tel [phone] • fax [phone] • www.townofcary.org

Management Commission (EMC) Water Quality Committee Meeting in October 1999. After the 155,400
lb/year load was calculated, a number of flow errors were identified. Specifically, several minor facilities
had permits for phased flow. The as -built flow had been previously used for load determination instead of
the build -out phased flow, bringing the total flow of minor discharges from 5.1 mgd to 6.93 mgd. Therefore,
the annual load of 155,400 lb/year had to be redistributed among more flow than had been used in the
original calculation. Instead of back -calculating a concentration using the new flow, individual facility TN
loads were determined by proportioning their flow to the total flow and multiplying that result by the total
allowable load for minors (15A NCAC 2B .0234).
In early 2000, the Town of Cary received a draft NPDES permit containing a 135,160 lb/year annual mass
load of nitrogen, representing a change from the existing concentration limit of 6 mg/L to a TMDL based
limit. The new 135,160 lb/year limit corresponded to the nitrogen load for only the Town of Cary. No credit
was given for the additional load from the Town of Morrisville. Based on the Town's and consulting
engineer's calculations using the method provided in 15A NCAC 2B .0234(4) for increasing an acceptor's
mass load of total nitrogen when a wastewater discharge has been eliminated in the Neuse River basin, a
request was made in May 2000 for 17,810 lb of total nitrogen to be added to the North Cary WRF permit,
bringing the total nitrogen load to 152,970 lb/year. However, when the fmal permit was issued in December
of 2000, the total nitrogen allocation was only increased to 144,134 lb/year.
In the current July 2003 permit round, the total nitrogen allocation for the North Cary WRF was reduced to
143,246 lb/year per the fmal rule adopted by the EMC in October of 2002. Our understanding is that this
current reduction in total nitrogen load at the North Cary WRF is due to a fine-tuning of the aforementioned
load redistribution issues associated with minor dischargers in the Neuse.
Based on our understanding of how the nitrogen load was calculated and distributed throughout the Neuse
River basin, we do not feel that our current nitrogen allocation for the North Cary WRF accurately or fairly
reflects the additional responsibility of treating Morrisville's flow. The Town of Cary appreciates this
opportunity to document our understanding of the issues surrounding the Neuse TMDL for total nitrogen.
We intend for this letter to be attached to the responses to the draft 2003 NPDES permit.
Sincerely,
Robert P. Bonn6
Utilities Director
Enclosures
cc: William B. Coleman, Jr., Town Manager
Robert K. Fisher, P.E., Director of Public Works and Utilities
Leon M. Holt, Pretreatment Inspector, Dept. of Public Works and Utilities
Chris Parisher, North Cary Water Reclamation Facility Superintendent
Mary Sadler, P.E., ARCADIS
Mark McIntire, DWQ NPDES Unit

AFFIDAVIT OF PUBLICATIOIN
NORTH CAROLINA.
Wake County. ) Ss.
----PUBLIC NOTICE
. STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT
COMMISSION SERVICE NPDES
MAIL
1617 CENTER
RALEIGH NC 27699-1617
NOTIFICATIWASOF TEW TERTO PERMITE A NPDES
On the basis of thorough staff review and application of NC
General Statute 143.21, Public law 92.500 and other lawful
standards and regulations, the North Carolina Environ-
mental Management Commission proposes to issue a
National Pollutant Discharge Elimination System
(NPDES) wastewater discharge permit to the person(s)
listed below effective 45 days from the publish date of this
notice.
Written comments regarding the proposed permit will be
accepted until 30 days after the publish date of this notice.
All comments received prior to that date are considered in
the final determinations regarding the proposed permit.
The Director of the NC Division of Water Quality may
decide to hold a public meeting for the proposed permit
should the Division received 'a significant degree of public
interest.
Copies of the draft permit and other supporting informa-
tion on file used to determine conditions present in the
draft permit are available upon request and payment of
the costs of reproduction. Mail comments and/or requests
for Information to the NC Division of Water Quality at the
above address or call Ms. Valerryy Stephens at (919)
733-5083, extension 520. Please include the NPDES permit
number (attached) in any communication. Interested
persons may also visit the Division of Water Quality at512
N. Salisbury. Street, Raleigh, NC 27604-1148 between the
hours at 8:00 a.m. and 5:00 p.m. to review Information on
file.
Heater Utilities, Inc. has applied for renewal of NPDES
permit NC0085863 for the Waterfall Plantation WTP. This
permitted facility discharges filter -backwash wastewater
to Horse Creek In the Neuse River Basin. Currently total
residual chlorine is water quality limited. This discharge
may affect further ollocatlons.in this portion of Horse
Creek.
The Town of Wake Forest has applied for renewal of
NPDES permit NC0007528 for its WTP. This permitted
facility discharges filter -backwash wastewater to Smith
Creek in the Neuse River Basin. Currently total residual
chlorine is water quality limited. This discharge may
affect further allocations in this portion of Smith Creek.
The Town of Wake Forest has applied for renewal of the
NPDES permit for its Smith Creek Wastewater Treatment
Plant (NC0030759). This facility is currently permitted to
discharged up to 2.4 MGD (with an ultimate permitted
capacity of 6.0 MGD) of treated dorestic and industrial
wastewater to the Neuse River in the Neuse River Basin.
Currently biochemical oxygen demand, ammoni-nitro-
gen, total residual chlorine, total nitrogen, and total
Phosphorus are water quality limited. This discharge may
impact future allocation of this resource.
The Town of Cary, hos applied for renewal of the NPDES
permit for its South Cary Water Reclamation Facility
(NC0065102) located off of North Carolina State Road 1390
in Wake County. The facility is permitted to discharge 12.8
MGD of treated domestic wastewater to Middle Creek, a
class C-NSW stream in he Neuse River Basin. Blochemicol
oxygen demand, ammonia -nitrogen, total residual chlo-
rine, total nitrogen, and total phosphorus ore currently
water quality limited. This discharge may impact future
allocation of this resource. .
The Town of Cary, has applied for renewal of the NPDES
permit for Its North Carolina Water Reclamation Facility
(NC0048879) located at 1900 Old Reedy Creek Road In
Cary, Wake County. The facility is permitted to discharge
12.0 MGD. of treated domestic wastewater to Crabtree
Creek, a class B-NSW stream in the Neuse River Basin.
Biochemical oxygen demand, ammonia -nitrogen, total
residual chlorine, total nitrogen, and total phosphorus are
currently water quality limited. This discharge may
impact future allocation of this resource.
The Town of Vanceboro has applied for renewal of NPDES
permit NC0080071 for its WTP. This permitted facility
discharges filter- and softener -backwash wastewater to
an unnamed tributary to Mauls Swamp In the Neuse River
Basin. Currently total residual chlorine Is water quality
limited. This discharge may affect future allocations In
this portion of Mauls Swamp.
N&O: July 19, 2003
Before the undersigned, a Notary Public of Johnston
County North Carolina, duly commissioned and authorized to
administer oaths, affirmations, etc., personally appeared Ivy
Marsch, who, being duly sworn or affirmed, according to law,
doth depose and say that she is Billing Manager -Legal
Advertising of The Smithfield Herald a corporation organized
and doing business under the Laws of the State of North
Carolina, and publishing a newspaper known as The
Smithfield Herald, in the City of Smithfield , Johnston County
and State aforesaid, the said newspaper in which such notice,
paper, document, or legal advertisement was published was, at
the time of each and every such publication, a newspaper
meeting all of the requirements and qualifications of Section 1-
597 of the General Statutes of North Carolina and was a
qualified newspaper within the meaning of Section 1-597 of
the General Statutes of North Carolina, and that as such she
makes this affidavit; that she is familiar with the books, files
and business of said corporation and by reference to the files
of said publication the attached advertisement for NC
DIVISION OF WATER QUALITY was inserted in the
aforesaid newspaper on dates as follows: 07/19/03
Account Number: 73350831
the books and files of the aforesaid Corporation and publication.
illing Manager -Legal Advertising
Sworn or affirmed to, and subscribed before me, this
21 day of JULY , 2003 AD
In Testimony Whereof, I have hereunto set my hand
and affixed my official seal, the day and year aforesaid.
Notary Public
My commission expires 2nd day of July, 2005.

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0048879
Facility Information
Applicant/Facility Name:
Town of Cary — North Cary Water Reclamation Facility
Applicant Address:
316 N. Academy Street, Cary, NC 27511
Facility Address:
1900 Old Reedy Creek Road, Cary, NC
Permitted Flow
12.0 MGD
Type of Waste:
97% domestic, 3% industrial
Facility/Permit Status:
Renewal
County:
Wake
Miscellaneous
Receiving Stream:
Crabtree Creek
Regional Office:
Raleigh
Stream Classification:
B-NSW
USES Topo Quad:
D23SE, Cary
303(d) Listed?:
No
Permit Writer:
Mark McIntire
Subbasin:
03-04-02
Date:
July 8, 2003
Drainage Area (mi2):
52.2
` " :
--'"
Summer 7Q10 (cfs)
0.3a
Winter 7Q10(cfs)0.8
Average Flow (cfs):
Regulated
IWC (%) 12.0 MGD:
98.4
IWC (%) for WET:
90
PROPOSED CHANGES:
• Annual Pollutant Analysis: Per Division policy, the priority pollutant analysis is now required annually
and is articulated in condition.A.(7).
• NH3-NEftluent Limitations: The permit currently limits ammonia at 0.5 mg/L and 1.0 mg/L during
the summer and winter respectively on a monthly average basis. Per Division policy, weekly average limits
will be installed in addition to the existing monthly average limits. These weekly average limits will be 1.5
mg/L and 3.0 mg/L during the summer and winter respectively (3 times the monthly average).
• TN Load Adjustment: The total nitrogen load for this facility has been adjusted in accordance with the
Neuse permitting rules to 143,246 lbs/year.
SUMMARY OF FACILITY AND WASTELOAD ALLOCATION
This permit was originally drafted using the Neuse River permitting strategy in April of 1998 in accordance
with the basinwide permitting process and the Neuse River Nutrient Management Strategy adopted in
December of 1997. The EMC adopted rules in December 1997 establishing the Neuse River Basin Nutrient
Management Strategy (NMS). The Strategy was designed to reverse the increasing impacts of nutrient
discharges upon the Neuse River estuary. It requires point and nonpoint sources to reduce total nitrogen (TN)
discharges sufficient to achieve a mandated 30% reduction at the estuary by 2003. Requirements for point
source dischargers are found in 15A NCAC 2B .0234, Wastewater Discharge Requirements. Shortly after the
adoption of the aforementioned rules, the Division of Water Quality determined that both the point source rule
and its supporting calculations contained significant errors. The Division estimated that the allocations as
adopted by rule would provide only 24% nitrogen reduction at the estuary. Point sources had to make
additional reductions in order to reach the 30% target.
Over the ensuing 18 months, the Division worked extensively with affected dischargers and interested
stakeholders, to inform them of the situation as it unfolded and to develop a mutually acceptable method of
distributing the point source allocation among the dischargers. At the completion of this effort, each of the
participants expressed overall support for the resulting allocation method. Some still have relatively minor
Cary North Fact Sheet
NPDES Renewal
Page 1

concerns about the method, but none indicated reservations about presenting the proposal to the Committee.
In February of 2000, revised temporary rules were adopted by the EMC. These revised rules aimed to correct
the errors made in the original rules adopted in 1997.
The total nitrogen load for this facility in the 2000 renewal was 144.134 lbs/year. Between the time the
permit was issued in 2000 and the adoption of the final Neuse rules last fall, additional, unallocated flow from
minor facilities was discovered. Because the total allowable load from all minor facilities is constant, this
additional flow reduced equivalent concentration for all minor facilities. This is of particular importance for
this facility because it connected two minor discharges (Town of Mooresville WWTPs) prior to the 2000
renewal but after 1995. Because the Neuse rules base TN load on 1995 flow, the allocated load for these
facilities was adjusted downward based on the additional flow discovered between 2000 and October of 2002.
In addition to the NPDES permit for discharge from this facility, the Town is permitted to reuse final effluent
via non -discharge permit number WQ0017064.
No reasonable potential analyses were conducted for this permit renewal. No appropriate toxicants are
monitored via the NPDES permit and LTMP data indicated results below detection levels.
TOXICITY TESTING:
Chronic P/F @ 90% at 12.0 MGD using Ceriodaphnia.
No change to the toxicity testing condition is recommended at this time. The facility passed all whole effluent
toxicity (WET) tests for the period of review (August 2000 - May 2003).
COMPLIANCE SUMMARY:
A review of the facilities compliance data indicates excellent performance. No permit limit violations were
noted during the review period.
INSTREAM MONITORING:
This facility is a participant in the Lower Neuse River Basin Association (LNBA). As a result, instream
monitoring requirements are provisionally waived in lieu of monitoring conducted by LNBA. Instream
monitoring requirements will be immediately reinstated should the Permittee terminate participation in the
LNBA and are outlined in condition A. (2) of the draft permit.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: July 25, 2003
Permit Scheduled to Issue: September 8, 2003
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please contact Mark
McIntire at [phone] ext. 508.
NPDES UNIT SIGNOFF: DATE:
Cary North Fact Sheet
NPDES Renewal
Page 2

AUG 3 0 2002
DENR-WATER QUALITY
POINT SOURCE BRANCH
Mr. Charles Weaver
NCDENR / Water Quality / Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: NPDES Permit No. NC0048879
Renewal Wake County
LIC WORKS AND UTILITIES
August 29, 2002
Dear Mr. Weaver,
In accordance with North Carolina General Statutes (NCGS) 143-215.1 (C ), the
Town of Cary is requesting renewal of the North Cary Water Reclamation Facility permit
(NC0048879). This submittal is in keeping with the 180 day requirement for a renewal
request based on the February 28, 2003 expiration date. Attached for your review and
comment are EPA Forms 1 and 2A (one signed original and two copies), and the
required sludge management plan (Attachment A) (one signed original and two copies).
The additional test for Toxicity analysis, other than ceriodaphnia, was conducted
in August, 2002 and will be submitted as soon as results are available.
If you have any questions, or desire any additional information, please contact me
at 469-4303.
Sincerely,
Robert P. Bonne
Utilities Director
Town of Cary
TOWN of CARY
1900 Old Reedy Creek Road•Cary, NC 27513•PO Box 8005•Cary, NC 27512-8005
tel [phone] • fax [phone]• www.townofcary.org

FIGURE 1
North Cary Water Reclamation Facility
s
North Cary WRF
Latitude and Longitude =-78.78, 35.84
1 Inch = .275 Miles

North Cary Water Reclamation Facility(Figure 2)
bic Digesters

Attachment A
SLUDGE MANAGEMENT PLAN
NORTH CARY WATER RECLAMATION FACILITY
NC0048879
History
The Town of Cary placed the North Cary Water Reclamation Facility in operation in July of
1984. At the time, sludge was dried by dual vacuum assisted drying beds. The sludge from the
drying beds was disposed of in the local landfills. The vacuum assisted drying beds worked well
at the low flows initially experienced during the first few years of operation. In the mid eighties,
Town staff began investigating land application alternatives with Dr. Bob Rubin of NC State.
The Town permitted less than 100 acres at a nearby farm. This worked so well that the Town
contracted with a sludge hauler shortly thereafter. In the middle of getting sufficient land
permitted to make the Town less dependent on the local landfills for ultimate disposal, the
landfills began refusing sludge dried on our drying beds. The Town made it a priority to
completely switch over to liquid land application as a fertilizer and soil amendment for local
farmers.
Since landfills have closed in North Carolina, the North Cary Water Reclamation Facility has
relied exclusively on contract liquid sludge application for recycling of digested sludge on local
farms. The Town of Cary currently recycles all of its residual solids from both wastewater
treatment facilities at area farms.
Sludge Production, Treatment and Disposal
At the current flow of 6.0 MDG, the North Cary facility is producing —1500 dry tons per year of
sludge. This equates to an annual hauling volume of —14 million gallons per year for disposal on
1822 acres of private land the Town had permitted for land application. The Town has a non -
discharge permit from the State of North Carolina Department of Environment, Health and
Natural Resources (No. WQ0000691) and is currently in compliance with all Environmental
Protection Agency's 40 CFR, Part 503 regulations.
The North Cary facility has an exceptional pretreatment program that provides protection of
sludge quality through the diligent efforts of the Town's pretreatment inspector. The biosolids
produced meets all pollutant concentrations in Table 3, 503.13 found in 40 CFR, Part 503 and has
consistently met Class B requirements in pathogen reduction. The biosolids produced
consistently qualifies for the high quality designation as determined by routine analysis well
beyond what is required for in the state and federal regulations.
Current and Future Planning
Construction began in July 1997 on a new biosolids facility and was completed in January of
1999. Following is a plan of action:
Phase I: The biosolids management plan at the North Cary WRF includes mechanical thickening
equipment prior to stabilization with continued use of aerobic digestion to meet Class B
requirements for stabilization.

♦L
a. Mechanical thickening facilities, including gravity belt thickening equipment with
polymer feed system, thickened biosolids pumping equipment, (possible odor control
facilities), and all appurtenances.
b. Modification and replacement of the aeration equipment in the aerobic digesters to
improve treatment and reduce odors.
c. Conversion of an aeration tank to a storage/aerobic digester tank (increases total
storage capabilities to 3.5 MDG).
d. Additional blower equipment
e. Miscellaneous yard piping and controls (SCADA)
As stated, Phase I was completed in early 1999. This mode of operation is currently being
utilized as the primary means of beneficial reuse. We have a successful biosolids land application
program which recycles Class B liquid biosolids to farmland in nearby counties. As development
and growth continue in the area, available farm land for application is becoming very scarce
within a reasonable distance. In order to manage the continued increase in biosolids costs and
ensure a sustainable program, we began looking at other alternatives. Consultants were retained
to look at the feasibility of a Class A biosolids management program that is reliable, cost
effective and has the ability to recycle beneficial organics and nutrients to the land with the Town
of Cary. Studies performed by our consultants revealed that a centralized biosolids processing
facility be located at the South Cary WRF would be the best alternative. Phase II involves the
following and is the Town of Cary's long term management strategy.
Phase II: The proposed biosolids processing scheme includes:
a. Gravity belt thickening at the NCWRF
b. Utilizing aerobic digestion prior to trucking liquid to SCWRF
c. Hauling as a liquid slurry using tanker trucks
d. Receiving and blending station at the SCWRF
e. Dewatering provided by high solids centrifugal prior to drying
f. Direct rotary drying system. Dryer will be designed to meet the Town of Cary's
future needs. This dryer will use natural gas as an energy source. Dried material
conveyance, cooling, screening and potential odor control facilities will be provided.
g. Product storage silos will be constructed to meet production rates. Also included will
be a truck loading and weigh station.
h. A distribution and marketing program for the biosolids pellets will be developed.
Plans are to utilize a portion of the final product for Town of Cary use and to market
and distribute the balance through fertilizer manufacturers in the southeast.
The staff and management of the Town of Cary is committed to having more than one altemative
for ultimate disposal of biosolids. Even with the biosolids dryer in operation, the Town will
continue the policy of having at least one alternative disposal option available in case of
emergency.
Town of Cary, North Carolina
By:
Robert Bonne
Utilities Director

Attachment B
Inflow and Infiltration Program for the Town Of Cary
PROGRAM SUMMARY
The Town of Cary Inflow/Infiltration program encompasses a number of methods and practices in
effort to eliminate extraneous flow. The program is actively involved in flow monitoring,
collection system inspection, video assessment, smoke testing, and modeling.
SMOKE TESTING
This is an annual program performed in the summer months, started in 1998. All repairs have been
completed through town staff, and by notification to residents of their responsibility to complete
private property repairs.
Overall Testing
Looking at the Town overall, it is felt to complete smoke testing of the entire wastewater
collection system will require 7-9 years.
GIS Data Base
The Town of Cary utilizes GIS information through "MAPINFO" software, and is used quite
extensively. All areas of the town are capable of accessing this information. Utility Department
personnel on a daily basis use maps of the collection system. Some recent additions to the
database include a manhole numbering system, as well as incorporating footage of collection
system inspected by underground video camera.
Manhole and System Rehabilitation
This ongoing program allows for fifty to one hundred manholes to be completed on a yearly basis.
A number of collection lines are currently involved in, or scheduled for restoration. This program
is utilizing methods from slip -lining to total replacement.
Video Inspections
The town currently utilizes two separate video camera vehicles. One vehicle is equipped with a 6"
and 8"inch mobile camera system, which has a capability of up to 24" line. Another vehicle is
equipped to solely handle 4" lateral services.
In addition to internal functions, as part of our overall collection system maintenance, the town
has secured a private contractor for widespread video taping of the collection system. This is an
ongoing process with the initial focus concentrated on the older sections of Cary. When areas are
discovered as points of concern, flow analysis is conducted to determine impact. The total amount
of system to be video taped under this contract is 180,000 feet.
FLOW -MONITORING
Flow monitoring is performed through the use of twelve individual units. Current and historical
flow data is being provided to the towns engineering department for further evaluation, and

2 of 2
demonstrates the relationship of additional flow and impact to the collection system as a result of
rainfall.
COLLECTION SYSTEM MASTER PLAN AND MODEL
The Town of Cary is near completion of its master plan and model. This valuable tool will allow
evaluation of the impact of current and future growth, inflow/infiltration, as it relates to
wastewater system capacity.

EL Br -PASS
Ex. S+'
INTERCEPTOR
BAR
RACK
1000 KW
GENERATOR
INFLUENT
PUMP STA
600 K'N
GENERATOR
uV
DISMFEC nCN
VALVE
VAULT
INFLUENT
P1:YP STATION
24 FORCE YAW
FORCE YA.N
24 FORCE URN
TAANHQE
/141.i
6.17 TACO
INFLUENT
►AR41A1L RwE
BAR
SCREENS
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BASINS i
C
a
1600 KW
QNERA TOR
PLANT PROCESSES
.506 TACO
n
34.
TO LAND
APPUCATION
CASCADE AE9ATION
42' EFFLUENT
6.02 YCO
*.FLuEN 1
RAS
3.06 YCO NFLUENT
AEROBIC
.UOCE
aceSTER
TANK /J
2.0 TAG
TO LANO
APPUCATION
EFFLUEN r
PARSHALL FLuYE
42-
1 f l n
Oxi0AnMN OIMNES
TRAIN 'A'
TO RA;
1 r-1 r--1 I
O:IOAnON a1CNES
TRAIN '6'
90LOaCAL REACTORS
AEROBIC
SLUDGE
DIGESTER
TANK /2
.75 MC
TO LANO
APPUCA nON
76'
36' TER nARY FILTERS
NORTH CARY WASTEWATER TREATMENT SCHEMATIC
Treatment consists of mechanical screening, one influent pump station (dry well) (12MGD)
(4 pumps) and one submersible (18MGD) (3 pumps) influent pump station, fine screen
mechanical barscreen, grit and grease removal system, nutrient removal system consisting of
anaerobic selectors, oxidation ditches, anoxic zones, reaeration zones. Immediately following are
(2) 130' diameter clarifiers (scum removal) which flow to tertiary treatment of (48) deep bed sand
filters, UV disinfection, cascade aeration and discharged to Crabtree Creek. Sludge is handled
by 2 (.75MG) aerobic digestors and 1 (2MG) aerobic digestor.
SLUOCE
T11ICKENER
FACUTr
SCUII
INCESTEA
6.02 TACO
24" EFFLUENT
.100 MOO
24' EFFLUENT
I2 w.S
RAS. WAS PUMP
STAncM AND
YE TER VAULTS
24" RAS
j YCTk VA,T.R VAU_r +{
r 1
24. EFFLUENT
a
ATTACHMENT C

ATTACHMENT D
NCWRF BIOASSAY MONITORING
Date
Effluent %
Type of Test
Pass/Fail
February, 1998
90%
Ceriodaphnia dubia
Pass
May, 1998
90%
Ceriodaphnia dubia
Pass
August, 1998
90%
Ceriodaphnia dubia
Pass
November, 1998
90%
Ceriodaphnia dubia
Pass
February, 1999
90%
Ceriodaphnia dubia
Pass
May, 1999
90%
Ceriodaphnia dubia
Pass
August, 1999
90%
Ceriodaphnia dubia
Pass
November, 1999
90%
Ceriodaphnia dubia
Fail
*January, 2000
90%
Ceriodaphnia dubia
Pass
February, 2000
90%
Ceriodaphnia dubia
Pass
May, 2000
90%
Ceriodaphnia dubia
Pass
August, 2000
90%
Ceriodaphnia dubia
Pass
November, 2000
90%
Ceriodaphnia dubia
Pass
February, 2001
90%
Ceriodaphnia dubia
Pass
May, 2001
90%
Ceriodaphnia dubia
Pass
August, 2001
90%
Ceriodaphnia dubia
Pass
November, 2001
90%
Ceriodaphnia dubia
Pass
February, 2002
90%
Ceriodaphnia dubia
Pass
May, 2002
90%
Ceriodaphnia dubia
Pass
Summary
The NCWRF conducted 19 bioassays in the 4.5 years of request.
Only one failure occurred during this period; the date was
November, 1999. Upon notice of failure, another analysis was
performed for the month of January, 2000 and the outcome was
"Pass". The facility has received excellent results for
toxicity testing with the exception of one failure.
*Follow-up test for November, 1999 failure.

CDM
consulting
engineering
construction
operations
Camp Dresser & McKee
5400 Glenwood Avenue, Suite 300
Raleigh, North Carolina 27612
Tel: [phone] Fax: [phone]
April 23, 2001
Mr. Charles Weaver
NC Department of Environment and Natural Resources
Division of Water Quality, NPDES Permitting Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
fit/4 2 Joelaoe--
APB 262001
Subject: North Cary Reclaimed Water Program (Contracts 1A and 1B)
Modification to North Cary WRF NPDES Permit
CDM Project No. 8241-24181
Dear Mr. Weaver:
The Town of Cary proposes to construct a reclaimed water system that will use
chlorinated effluent from its North Cary Water Reclamation Facility (WRF). The Town
currently holds an NPDES permit (NC0048879) for discharging wastewater treated at the
North Cary WRF into Crabtree Creek via one outfall. The permit also allows the Town to
distribute reclaimed water through its bulk reclaimed water fill station. In order to
redirect a portion of the effluent into the reclaimed water distribution system, the Town of
Cary requests a minor modification to its existing NPDES permit to allow a separate
discharge into the reclaimed water distribution system.
The proposed reclaimed water system will serve office, commercial, and residential
customers in Cary. The purpose of the system is to lessen the demands on the Cary/Apex
Water Treatment Facility (WTF), lessen the discharge into Crabtree Creek, and provide
highly treated reclaimed water to the customers of Cary for nonpotable use. The North
Cary Reclaimed Water Program includes the following components:
• Pump Station - a new 7.5-mgd reclaimed water pump station at the existing North
Cary WRF to provide the pressure necessary to feed the distribution system.
• Chlorine Injection System - a chlorine injection system with feed points before the
storage tank and downstream of the reclaimed water system pumps at the existing
North Cary WRF to provide a disinfection residual in the reclaimed water distribution
system. The hypochlorite system consists of a 6,000-gallon storage tank and three feed
pumps.
• Storage Tank - a new 1.0-million-gallon (MG) covered, prestressed concrete storage
tank at the existing North Cary WRF for storage of the reclaimed water.
• Flow Diversion Structure - a flow diversion structure at the WRF to divert the plant
effluent from the existing 30-inch diameter outfall to the new reclaimed water storage
and pumping facilities.

CDM Camp Dresser & McKee
Mr. Charles Weaver
April 23, 2001
Page 2
• Monitoring and Control Equipment - equipment to ensure that treated effluent that
does not meet the reuse criteria does not enter the reclaimed water system. The system
will allow monitoring of effluent turbidity (using redundant metering capability) to
provide a real-time control of the diversion valve. In addition, the system will be used
to monitor and control residual chlorine levels and control pumping cycles.
• Transmission Mains and Distribution Pipelines - reclaimed water transmission mains
and distribution pipelines to convey the reclaimed water to customers.
The projected initial and build -out demands for the reclaimed water system are
summarized in the following table. The actual quantity of effluent that will enter the
reclaimed water system will vary seasonally and with the amount of rainfall received.
Estimated Reclaimed Water Demands by Project Phase
for North Cary Reclaimed Water Service Area
Description
Reclaimed Water Demands (mgd)
Average Day
Maximum Day
Peak Hour
Existing - Project 1
0.30
1.18
2.07
Potential Future Service Area at Build -out
1.07
4.28
7.49
The Non -Discharge Permit to Construct the North Cary Reclaimed Water Program
(Contracts 1A and 1B) was issued on May 15, 2000, and a copy of the permit is attached.
The project is currently under construction, and the Non -Discharge Permitting Unit
(NDPU) is currently reviewing the project for a Permit to Operate the system.
Construction is scheduled to be completed on May 10, 2001.
Please call me at [phone] if you have any questions related to the project. Thank
you for your assistance.
Very truly yours,
CAMP DRESSER & McKEE
a.12-- 3-awe_
Kelly R. Boone
cc: Rob Bonne, Town of Cary
Shannon Thornburg, Non -Discharge Permitting Unit
Wayne Miles, CDM

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross Jr., Secretary
Kerr T. Stevens, Director
May 14, 2001
MR. ROBERT BONNE, UTILITIES DIRECTOR
TOWN OF CARY
POST OFFICE Box 8005
CARY, NORTH CAROLINA 27512-8005
Dear Mr. Bonne:
A7rA
NCP-E R
NORTH CAROL1' DEPARTMEI Q
ENVIRONMENT AND ATUR. RE_QURpES
c)
[V ::
CO `(..?
'-"
LJ
J0.
Subject: Permit No. W
Town of Cary
North Cary Water Reclamation Facility
Bulk Reclaimed Water Distribution Program
Wake County
In accordance with your application received on December 21, 2000 as well as the additional information
received on April 11, 2001, we are forwarding herewith Permit No. WQ0017064, dated May 14, 2001, to the Town
of Cary for the continued operation of a bulk reclaimed water distribution program from the North Cary Water
Reclamation Facility.
Note that this permit is being modified to allow for the construction and operation of a permanent fill station
located near the reclaimed water program facilities that were previously permitted by the Division of Water Quality
(Division) under Permit No. WQ0017923. No other aspects associated with the operation of the bulk reclaimed
water distribution program have been changed as a result of this modification. It is important, however, to take to
review this permit thoroughly. Of particular interest are the following new and amended conditions:
• General: The system description has been amended to allow the construction and operation of the
permanent fill station. It is the Division's understanding that this fill station will be used exclusively
following its construction and verification of its proper operation.
• Condition I. 1.: This permit contains a requirement for another engineer' s certification to be prepared
and submitted to the Division in order to verify that the permitted facilities were installed properly.
• Condition I. 7. through Condition I. 10.: These new conditions have been included in this permit in order
to ensure complete compliance with 15A NCAC 2H .0219 (k)(1)(D).
• Condition II. 2.: This condition has been amended to reflect the adoption of new rules by the Water
Pollution Control System Operators Certification Commission (WPCSOCC). The referenced regulation
is now 15A NCAC 8G .0202.
• Condition III. 2.: Residual chlorine has been added to the list of parameters for which the bulk reclaimed
water must be monitored. Note that it is acceptable to report the results from the analyzer that is used to
measure the residual chlorine in the reclaimed water that is distributed to the North Cary Reclaimed
Water Program (i.e., approved under Permit No. WQ0017923) for the purposes of compliance with this
permit.
1617 Mail Service Center, Raleigh, North Carolina 27699-1617 Telephone [phone] Fax [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/10% post -consumer paper

♦ Condition V. 5.: This condition has been amended with examples of other statutes, rules, regulations,
and ordinances with which the Permittee must comply and that are not under the jurisdiction of this
permit.
This permit shall be effective from the date of issuance until July 31, 2004; shall void Permit No.
WQ0017064, issued on August 17, 1999; and shall be subject to the conditions and limitations as specified therein.
Please pay particular attention to the monitoring requirements in this permit. Failure to establish an adequate
system for collecting and maintaining the required operational information will result in future compliance
problems.
If any parts, requirements, or limitations contained in this permit are unacceptable, you have the right to
request an adjudicatory hearing upon written request within 30 days following receipt of this permit. This request
must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and
filed with the Office of Administrative Hearings, 6714 Mail Service Center, Raleigh, NC 27699-6714. Unless such
demands are made, this permit shall be final and binding.
One set of the approved plans is being forwarded to you. If you need additional information concerning this
matter, please contact Ms. Shannon Mohr Thornburg at [phone], ension 353.
cc: Camp, Dresser & McKee, Inc.
Wake County Health Department
Raleigh Regional Office, Water Quality Section
Raleigh Regional Office, Groundwater Section
Central Office, Groundwater Section
Technical Assistance and Certification Unit
Non -Discharge Compliance/Enforcement Unit
NPDES Unit
Sinc
ileZ
Kerr T. Stevens
2

NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
RALEIGH
BULK RECLAIMED WATER DISTRIBUTION PERMIT
In accordance with the provisions of Article 21 of Chapter 143, General Statutes of North Carolina as amended, and
other applicable Laws, Rules, and Regulations
PERMISSION IS HEREBY GRANTED TO
Town of Cary
Wake County
FOR THE
continued operation of a 100,000-GPD bulk reclaimed water distribution program and all associated facilities at the
North Cary Water Reclamation Facility (NPDES Permit No. NC0048879). Bulk reclaimed water, following
treatment and testing according to the water reclamation facility's existing NPDES permit and the conditions
provided herein, may be manually distributed from a temporary fill station. The temporary fill station shall consist
of a two-inch hose connected to a quick -connect coupling and gate valve tapped onto an existing four -inch non -
potable water line that serves the water reclamation facility.
construction and operation of a 100,000-GPD bulk reclaimed water distribution program and all associated facilities
at the North Cary Water Reclamation Facility (NPDES Permit No. NC0048879). Bulk reclaimed water, following
treatment and testing according to the water reclamation facility's existing NPDES permit and the conditions
provided herein, may be manually distributed from a permanent fill station located near the reclaimed water
program facilities permitted for construction under Permit No. WQ0017923. The fill station is located near the
southwestern border of the water reclamation facility, between the residuals management facilities and the
1,000,000-gallon reclaimed water storage tank. The permanent fill station shall be connected to a four -inch
reclaimed water line from the reclaimed water pump station and shall consist of the following minimum
components: a secured, below -ground valve vault containing isolation valves and a flow metering device; a four -
inch fill pipe ending in a 90°-bend that is approximately 15 feet high and supported on a metal structure to facilitate
filling trucks with reclaimed water; a two-inch side -load alternate fill port; a concrete apron with a drain to collect
and convey reclaimed water back to the headworks of the water reclamation facility; and all other appurtenances as
required to make a complete and operational system.
The temporary fill station detailed in the first paragraph of this system description shall be abandoned
following successful start-up of the permanent fill station. Regardless of which fill station is utilized, all reclaimed
water distributed must be measured and recorded by a flow metering device. Bulk reclaimed water may only be
distributed to approved trucks and drivers for the following uses: sewer line flushing, street sweeping, irrigation of
landscapes not intended for human consumption, and construction uses such as soil compaction, dust control, and
asphalt reclamation. The bulk reclaimed water distribution program shall be operated such that no discharge of
wastes to surface waters occurs, pursuant to application received on December 21, 2000 as well as the additional
information received on April 11, 2001 and in conformity with the project plans, specifications, and other
supporting data subsequently filed and approved by the Department of Environment and Natural Resources and
considered a part of this permit.
1

This permit shall be effective from the date of issuance until July 31, 2004; shall void Permit No.
WQ0017064, issued on August 17, 1999 and shall be subject to the following specified conditions and limitations:
I. PERFORMANCE STANDARDS
1. Upon completion of construction and prior to operation of the permitted facilities, a certification shall
be received from a North Carolina -licensed professional engineer certifying that the facilities have been
installed in accordance with this permit, the approved plans and specifications, and other supporting
materials. If this project is to be completed in phases and partially certified, you shall retain the
responsibility to track further construction approved under the same permit, and shall provide a final
certificate of completion once the entire proiect has been completed. Mail the Certification to the Non -
Discharge Permitting Unit, 1617 Mail Service Center, Raleigh, NC 27699-1617.
2. The Raleigh Regional Office, telephone number [phone], shall be notified at least 48 hours in
advance of operation of the permitted facilities so that an in -place inspection can be made. Such
notification to the regional supervisor shall be made during normal office hours (i.e., from 8:00 a.m.
until 5:00 p.m. on Monday through Friday, excluding State Holidays).
3. The bulk reclaimed water distribution program and facilities shall be effectively maintained and
operated at all times so that there is no discharge to the surface waters, nor any contamination of
ground waters which will render them unsatisfactory for normal use. In the event that the program
and/or facilities fail to perform satisfactorily, including the creation of nuisance conditions or failure of
the application areas to adequately assimilate the wastewater, the Permittee shall take immediate
corrective actions including those actions that may be required by the Division of Water Quality
(Division), such as the construction of additional or replacement reclaimed water treatment facilities or
cessation of the operation of the bulk reclaimed water distribution program.
4. The issuance of this permit shall not relieve the Permittee of the responsibility for damages to surface
or groundwaters resulting from the operation of the bulk reclaimed water distribution program and
facilities.
5. The Permittee shall maintain a spill prevention, countermeasures, and control plan for the water
reclamation facility as well as for the bulk reclaimed water distribution program.
6. Diversion or bypassing of the untreated wastewater from the reclaimed water treatment facilities is
prohibited.
7. All reclaimed water valves, storage facilities, outlets shall be tagged or labeled to warn the public or
employees that the water is not intended for drinking. Where appropriate, such warning shall inform
the public or employees to avoid contact with the water.
8. All reclaimed water piping,,kyalves, outlets and other appurtenances shall be color -coded, taped, or
otherwise marked to identify the source of the water as being reclaimed water.
a. All reclaimed water piping and appurtenances shall be either colored purple (i.e., Pantone 522) and
embossed or integrally stamped or marked "CAUTION: RECLAIMED WATER — DO NOT
DRINK" or be installed with a purple (i.e., Pantone 522) identification tape or polyethylene vinyl
wrap. The warning shall be stamped on opposite sides of the pipe and repeated every three feet or
less.
b. Identification tape shall be at least three inches wide and have white or black lettering on purple
(i.e., Pantone 522) field stating "CAUTION: RECLAIMED WATER — DO NOT DRINK."
Identification tape shall be installed on top of reclaimed water pipelines, fastened at least every 10
feet to each pipe length and run continuously the entire length of the pipe.
2

9. All reclaimed water valves and outlets shall be of a type, or secured in a manner, that permits operation
by authorized personnel only.
10. Above -ground hose bibs (i.e., spigots or other hand -operated connections) shall not be present. Hose
bibs shall be located in locked below -grade vaults that shall be clearly labeled as being of non -potable
quality. As an alternative to the use of locked below -grade vaults with standard hose bibs services,
hose bibs, which can only be operated by a special tool may be placed in non -lockable underground
services boxes clearly labeled as non -potable water.
11. The Permittee shall approve all tank trucks for participation in the bulk reclaimed water distribution
program prior to distribution of reclaimed water. Tank trucks shall meet the following minimum
criteria:
a. Tank trucks and other equipment used to distribute reclaimed water shall be clearly identified with
advisory signs.
b. Tank trucks used to transport reclaimed water shall not be used to transport potable water that is
used for drinking or other potable purposes.
c. Tank trucks used to transport reclaimed water shall not be filled through on -board piping or
removable hoses that may subsequently be used to fill tanks with water from a potable water
supply.
d. Tank trucks used to transport septage, raw wastewater, or wastewater residuals shall not be used to
transport reclaimed water.
12.. The Permittee shall approve tank truck drivers for participation in the bulk reclaimed water distribution
program prior to distribution of reclaimed water. In addition, the Permittee shall provide bilingual
(English and Spanish) training to all tank truck drivers approved to participate in the bulk reclaimed
water distribution program at a regular frequency. These sessions shall provide training on, but not
limited to, the following topics:
a. Reclaimed water description and safety,
b. Approved and disapproved uses of reclaimed water,
c. Procedures for the application (including buffer maintenance), uses, and storage of reclaimed water
as well as the disposal of unused reclaimed water,
d. Procedures for spill prevention, countermeasures, and control as well as notification requirements,
e. Personal safety and hygiene issues, and
f. Interaction with the general public.
13. The following uses of reclaimed water shall be strictly forbidden by the Permittee:
a. Irrigation of direct food crops,
b. Filling of swimming pools, hot tubs, or similar uses,
c. Use as a raw potable water supply, and
d. Use after 72 hours of storage.
3

The following uses of reclaimed water distributed through the bulk reclaimed water distribution
program shall be approved:
a. Sewer line flushing,
b. Street sweeping,
c. Landscape irrigation, and
d. Construction uses such as soil compaction, dust control, and asphalt reclamation.
All other uses for reclaimed water shall not be allowed by the Permittee. In the event there is a desire
for the permitting of additional uses, a formal permit modification request must be submitted to the
Division accompanied by an application fee and other supporting materials as may be appropriate. The
approval of this request will be considered on its merits and may or may not be approved.
14. The following buffers shall be maintained during application of reclaimed water distributed through the
bulk reclaimed water distribution program:
a. 100 feet between wetted areas and water supply wells,
b. 10 feet between wetted areas and non -potable well,
c. 100 feet between wetted areas and waters classified as SA including wetlands as delineated and
designated by the appropriate state or federal agency, and
d. 25 feet between wetted areas and surface waters not classified as SA including wetlands as
delineated or designated by the appropriate state or federal agency or any swimming pool.
15. Public access to the application sites and contact witli reclaimed water shall be controlled during
reclaimed water distribution and use. Such controls may include public meetings, publication of
notices in local newspapers, notification through television and radio news programs, as well as
distribution of the bilingual educational flyers.
II. OPERATION AND MAINTENANCE REQUIREMENTS
1. The bulk reclaimed water distribution program and facilities shall be properly maintained and operated
at all times.
2. Upon classification of the facilities by the Water Pollution Control System Operators Certification
Commission (WPCSOCC), the Permittee shall employ a certified wastewater treatment plant operator
to be in responsible charge (ORC) of the facilities. The operator shall hold a certificate of the type and
grade at least equivalent to or greater than the classification assigned to the facilities by the
WPCSOCC. The Permittee shall also employ a certified back-up operator of the appropriate type and
grade to comply with the conditions of 15A NCAC 8G .0202. The ORC of the facilities shall visit each
Class I facility at least weekly and each Class II, III, and IV facility at least daily, excluding weekends
and holidays, shall properly manage and document daily operation and maintenance of the facilities,
and shall comply with all other conditions of 15A NCAC 8G .0202. Once the facilities are classified,
the Permittee shall submit a letter to the WPCSOCC that designates the ORC within 30 days after the
facilities are 50 percent complete. The ORC of the reclaimed water facility shall be responsible for the
operation of both the bulk reclaimed water distribution program and the bulk reclaimed water
distribution facilities.
3. A certified operator of a grade equivalent or greater than the water reclamation facility shall be on call
24 hours per day.
4. Bulk reclaimed water shall not be distributed for land -based uses nor shall reclaimed water be used for
land -based activities during inclement weather or when the ground is in a condition that will cause
runoff.
4

5. The Permittee shall implement adequate measures to prevent reclaimed water runoff from the
application areas.
6. The bulk reclaimed water distribution program and facilities shall be effectively maintained and
operated as a non -discharge system to prevent the discharge of any reclaimed water resulting from the
operation of the program and its associated facilities.
7. No type of reclaimed water other than that from North Cary Water Reclamation Facility shall be
distributed through the bulk reclaimed water distribution program and facilities.
8. All wastewater shall either be routed to the headworks of the reclaimed water facility or discharged in
strict accordance with the conditions of the facility's existing NPDES permit should the limit for fecal
coliform (i.e., daily maximum concentration of 25 per 100 milliliters) or turbidity (i.e., instantaneous
maximum of 10 nephelometric turbidity units) be exceeded, until such time that the levels have
stabilized below these maximum levels.
9. All reclaimed water distributed, but not used within a period not to exceed 72 hours from the time of
distribution, shall be reintroduced at the headworks of the reclaimed water facility for treatment.
III. MONITORING AND REPORTING REQUIREMENTS
1. Any monitoring (i.e., including groundwater, surface water, soil or plant tissue analyses) deemed
necessary by the Division to ensure surface and ground water protection shall be established and an
acceptable sampling reporting schedule shall be followed.
2. As an indicator of proper operation and maintenance, the water reclamation facility shall produce an
effluent in compliance with the following limitations:
Parameter Monthly Average' Daily (Instantaneous) Maximum
Distributed Flow 100,000 GPD
CBODS (5-day, 20°C) 10 mg/L 15 mg/L
Ammonia -Nitrogen 4 mg/L 6 mg/L
Total Suspended Solids 5 mg/L 10 mg/L
Fecal Coliform 14 per 100 mL b 25 per 100 mL
Turbidity 10 NTU
a
b
c
The monthly average concentrations for all parameters except fecal coliform shall be the arithmetic
mean of all samples collected during the reporting period.
The monthly average concentration for fecal coliform shall be the geometric mean of all samples
collected during the reporting period.
The daily maximum concentrations for all parameters shall be the maximum value of all samples
collected during the reporting period.
5

The effluent from the subject facilities (i.e., representative of the bulk reclaimed water distributed) shall
be monitored, by the Permittee, at the point prior to discharge to the bulk reclaimed water distribution
facilities for the following parameters:
Parameter Sampling Point Sampling Frequency Type of Sample
Distributed Flow Prior to Distribution As Distributed Recording
Residual Chlorine Prior to Distribution Continuous Recording
Turbidity Prior to Distribution Continuous Recording
CBODS (5-day, 20°C) Prior to Distribution Daily Composite
NH3 as N Prior to Distribution Daily Composite
TSS Prior to Distribution Daily Composite
Fecal Coliform Prior to Distribution Daily Grab
The effluent pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
3. The Permittee shall maintain applications of all approved tank trucks and drivers on file for the duration,
not less than one year, that the driver participates in the bulk reclaimed water distribution program.
4. Adequate records shall be maintained by the Permittee that tracks the amount bulk reclaimed water
distributed. These records shall include, but are not necessarily limited to the following information:
a. Date and time of distribution,
b. Volume of reclaimed water distribution,
c. Intended uses of reclaimed water,
d. Locations of intended uses,
e. Names and approval status of truck operators,
f. Approval status of trucks,
g. Compliance status of the water reclamation facility, and
h. Weather conditions.
5. Three copies of all operation and distribution records (i.e., as specified in Condition III. 4.) shall be
submitted on the "Town of Cary NCWRF Bulk Reclaimed Water Distribution Program Daily
Monitoring Report" form on or before the last day of the month following the month that was
monitored. Three copies of all effluent monitoring data (i.e., as specified in Condition III. 2.) on Form
NDMR-1 shall be submitted on or before the last day of the month following the month that was
monitored. All information shall be submitted to the following address:
NC Division of Water Quality
Water Quality Section
Non -Discharge Compliance/Enforcement Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
6

6. Noncompliance Notification:
The Permittee shall report by telephone to the Raleigh Regional Office, telephone number (919) 571-
4700, as soon as possible, but in no case more than 24 hours or on the next working day following the
occurrence or first knowledge of the occurrence of any of the following:
a. Any occurrence at the water reclamation facility which results in the treatment of significant
amounts of wastes which are abnormal in quantity or characteristic, such as the dumping of the
contents of a sludge digester; the known passage of a slug of hazardous substance through the
facility; or any other unusual circumstances.
b. Any process unit failure, due to known or unknown reasons, that render the facility incapable of
adequate wastewater treatment such as mechanical or electrical failures of pumps, aerators,
compressors, etc.
c. Any failure of a pumping station, sewer line, or treatment facility resulting in a by-pass directly to
receiving waters without treatment of all or any portion of the influent to such station or facility.
d. Any spill of reclaimed water from the bulk reclaimed water distribution facilities during filling,
from tank trucks during transport, or from tank trucks during application.
e. Any time that self -monitoring information indicates that the facility has gone out of compliance
with its permit limitations.
Persons reporting such occurrences by telephone shall also file a written report in letter form within
five days following first knowledge of the occurrence. This report must outline the actions taken or
proposed to be taken to ensure that the problem does not recur.
IV. INSPECTIONS
1. Adequate inspection, maintenance, and cleaning shall be provided by the Permittee to ensure proper
operation and management of the bulk reclaimed water distribution program and facilities.
2. The Permittee or his designee shall inspect the reclaimed bulk water distribution program and facilities
to prevent malfunctions and deterioration, operator errors and discharges which may cause or lead to
the release of wastes to the environment, a threat to human health, or a nuisance. The Permittee shall
keep an inspection log or summary including at least the date and time of inspection, observations
made, and any maintenance, repairs, or corrective actions taken by the Permittee. This log of
inspections shall be maintained by the Permittee for a period of three years from the date of the
inspection and shall be made available upon request to the Division or other permitting authority.
3. Any duly authorized officer, employee, or representative of the Division may, upon presentation of
credentials, enter and inspect any property, premises or place on or related to the bulk reclaimed water
distribution program or facilities at any reasonable time for the purpose of determining compliance
with this permit; may inspect or copy any records that must be maintained under the terms and
conditions of this permit, and may obtain samples of groundwater, surface water, or leachate.
V. GENERAL CONDITIONS
1. This permit shall become voidable unless the bulk reclaimed water distribution program and facilities
are constructed and operated in accordance with the conditions of this permit, the approved plans and
specifications, and other supporting data.
2. This permit shall be effective only with respect to the nature and volume of reclaimed water described
in the application and other supporting data.
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3. This permit shall not be transferable. In the event there is a desire for the bulk reclaimed water
distribution program and facilities to change ownership, or there is a name change of the Permittee, a
formal permit request shall be submitted to the Division accompanied by documentation from the
parties involved and other supporting materials as may be appropriate. The approval of this request
shall be considered on its merits and may or may not be approved.
4. Failure to abide by the conditions and limitations contained in this permit may subject the Permittee to
an enforcement action by the Division in accordance with North Carolina General Statute § 143-215.6A
through § 143-215.6C.
5. The issuance of this permit shall not exempt the Permittee from complying with any and all statutes,
rules, regulations, or ordinances that may be imposed by other government agencies (i.e., local, state
and federal) which have jurisdiction, including but not limited to applicable river buffer rules in 15A
NCAC 2B .0200, erosion and sedimentation control requirements in 15A NCAC Ch. 4 and under the
Division's General Permit NCG0100000, and any requirements pertaining to wetlands under 15A
NCAC 2B .0200 and 15A NCAC 2H .0500.
6. The annual administering and compliance fee shall be paid by the Permittee within thirty days after
being billed by the Division. Failure to pay the fee accordingly may cause the Division to initiate
action to revoke this permit as specified by 15 NCAC 2H .0205 (c)(4).
7. The Permittee, at least six months prior to the expiration of this permit, shall request its extension.
Upon receipt of the request, the Division shall review the adequacy of the bulk reclaimed water
distribution program and facilities described therein, and if warranted, will extend the permit for such
period of time and under such conditions and limitations as it may deem appropriate.
8. This permit in no way negates, precludes, or invalidates NPDES Permit Number NC0048879, and the
Permittee shall continue to comply with all conditions provided for therein.
Permit issued this ►; urteenth day of May, 2001
NOR �AROLIN NVIR NMENTAL MANAGEMENT COMMISSION
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission
Permit Number WQ0017064
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