NC0028916_Permit Issuance_20150615

Pat McCrory
Governor
"A
NCDENR
North Carolina Department of Environment and Natural Resources
June 15, 2015
Mr. Benny Dennis, Public Works Director
Town of Troy
315 N. Main Street
Troy, North Carolina 27371-7841
Dear Mr. Dennis:
Donald R. van der Vaart
Secretary
Subject: Issuance of NPDES Permit Renewal
Permit No. NCO028916
Troy WWTP
Montgomery County
Facility Class III
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 Memorandum of Agreement between North Carolina and the U.S.
Environmental Protection Agency dated October 15, 2007 (or as subsequently amended).
The following changes were made to the draft permit sent to you on April 22, 2015:
• In Condition A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
footnote 6 and A. (2.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY) paragraph
2, the chronic toxicity test schedule was changed to January, April, July, and October.
• In Condition A. (3.) EFFLUENT POLLUTANT SCAN, Aquatic Toxicology Branch address
was modified to:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, North Carolina 27699-1623
As identified previously, the renewal permit contains the following significant changes from
your current permit:
• The requirement to begin reporting discharge monitoring data electronically using the NC
DWR's Electronic Discharge Monitoring Report (eDMR) internet application has-been added
to your NPDES permit. [See Special Condition A.(4.)]
For information on eDMR, registering for eDMR and obtaining an eDMR user account,
please visit the following web page: http://portal.ncdenr.or web/wq/adminibo�pu/edrnr.
1617Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] Internet: www.ncdenr.gov
An Equal Opportunity 1 Affirmative Action Employer — Made in part by recycled paper

fr
For information on EPA's proposed NPDES Electronic Reporting Rule, please visit the
following web site: hit 2://www2.gpa.aov/compliance/proposed-npdes-electronic reporting
rule.
• Instream monitoring has been waived as long as the Permittee maintains full and active
membership in the Yadkin -Pee Dee River Basin Association (YPDRBA). Please see footnote
#2 in A.(1.).
• In accordance with an agreement with EPA Region IV, wasteload allocations for ammonia -
nitrogen are based on a summer criterion of 1 mg/L and a winter criterion of 1.8 mg/L. Since
the WWTP is provided low dilution from the receiving stream, the monthly average effluent
limits determined for the Troy WWTP are 1.1 mg/L in the summer and 3.9 mg/L in the
winter. Using a 3:1 ratio the weekly average limits for NH3-N should be 3.3 mg/L in the
summer and 11.7 mg/L in the winter. The permit renewal was revised to include these
limitations. A review of effluent data during the period of 2012 through 2014 shows the
WWTP is able to meet these limitations.
• Effluent sampling data for total copper and total zinc showed reasonable potential to violate
NC Water Quality Standards (WQSs). However, copper and zinc are action level parameters
and limits are applied in, conjunction with toxicity test results. Since this facility is passing
its toxicity tests, limitations for copper and zinc were not put in the permit. Monitoring was
reduced to quarterly to coincide with toxicity testing requirements.
• Effluent data for chloride showed no reasonable potential to exceed state water quality
standards; however, the maximum predicted concentration was greater than half of the
allowable concentration. Chloride monitoring remains in the permit with. a monitoring
frequency of quarterly.
• Selenium effluent data showed 13 samples <10 ug/L and 2 samples <2 ug/L. The Troy
WWTP's chronic allowable allocation for selenium is 5.9 ug/L. In accordance with NC
Administrative Code Section 15A NCAC. 02B .0500, all test procedures must produce
.detection and reporting levels that are below the permit discharge requirements and all data
generated must be reported to the approved detection level or lower reporting level of the
procedure. DWR's Water Sciences Section has determined that the Practical Quantitation
Limit (PQL) for selenium is 5 ug/L. Please see that the certified laboratory performing the
Town's metals analysis can measure to the approved detection level or lower
reporting level. A list of PQL's determined by the Division can be found at the following
website: http://portal.ncdenr.or web/wq/lab/ops/inorg.
• Thallium effluent data showed 1 sample was detected at 9 ug/L and the EPA Human Health
(HH) standard' is 0.47 ug/L. Three other samples were < 20 ug/L. DWR's Water Sciences
Section has determined that the PQL for thallium is 10 ug/L. Since this is a limited data set
with one value greater than the allowable concentration but less than the PQL, monitoring for
thallium shall continue as part of the effluent pollutant scans and all data,generated must be
reported to the approved detection level or lower reporting level of the procedure (10 ug/L).
• In accordance with the 2012 Mercury TMDL NPDES Guidance the permittee needs to show
annual mean effluent concentrations below both the Water Quality Based Effluent Limitation
(WQBEL) of 14.3 ng/L and the Technology Based Effluent Limitation (TBEL) of 47 ng/L. A
review of the effluent mercury data from 2010 to 2014 showed that the annual averages were

below both the WQBEL and the TBEL, therefore, no mercury limitation is required. The
permittee will be required to continue monitoring mercury as part of its required effluent
pollutants scans and its Pretreatment STMP, using EPA method 1631 E.
• Some of the wording has changed in Special Condition A. (2), Chronic Toxicity Permit
Limit, please review each paragraph carefully.
• Special Condition A.(3.) has been modified to include the specific three years in which the
Effluent Pollutant Scans shall be performed (2016, 2017, and 2018). In addition, at the end of
the Special Condition, 2nd species Toxicity Testing Requirements for municipal permit
renewals per Federal Regulations [40 CFR 122.210)(5)] have been added.
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 decision shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division
may require modification or revocation and reissuance of the permit. This permit does not affect
the legal requirements to obtain other permits which may be required by the Division of Water
Resources or any other Federal, State, or Local government permits that may be required.
If you have questions concerning this permit, please contact Yang Song by e-mail
([e-mail]) or phone at [phone].
Sincerely,
Jay Zimmerman, P.G.
Director, Division of Water Resources
Enclosure: NPDES Permit NC0028916
cc: NPDES Unit
Central Files
Fayetteville Regional Office / Surface Water Protection Section
e-copy:
EPA Region IV
Carrie Ruhlman, Water Sciences Section
Susan Meadows, Aquatic Toxicity Branch
Steve Reid, Wastewater Operator Certification & Training
Joseph Shields, ORC, Troy WWTP

Permit NCO028916
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER RESOURCES
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,
Town of Troy
is hereby authorized to discharge wastewater from a facility located at the
Town of Troy Wastewater Treatment Plant
650 Glen Road
Northeast of Troy
Montgomery County
to receiving waters designated as Densons Creek in the Yadkin -Pee Dee River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts
I, n, III and IV hereof.
This permit shall become effective August 1, 2015.
This permit and authorization to discharge shall expire at midnight on June 30, 2019.
Signed this day June 15, 2015.
Zimmerm , P:
rector, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 8

Permit NCO028916
SUPPLEMENT TO PERMIT COVER SKEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby revoked. As
of this permit issuance, any previously issued permit bearing this number is no longer effective. Therefore, the
exclusive authority to operate and discharge from this facility arises under the permit conditions, requirements,
terms, and provisions included herein.
Town of Troy is hereby authorized to:
1. Continue to operate an existing 1.2 MGD wastewater treatment plant consisting of the following
treatment components:
♦ Flow equalization
♦ 10-Acre EQ Basin
♦ Mechanically cleaned bar screen
♦ Aerated grit removal system
♦ Influent Parshall Flume with Ultrasonic flow meter
♦ Dual oxidation ditches arranged in series
♦ Dual secondary clarifiers
♦ UV disinfection
♦ Chlorination/dechlorination (back-up)
♦ Sludge transfer tank
♦ Aerobic sludge digester
This facility is located at the Troy Wastewater Treatment Plant, 650 Glen Road, Troy, Montgomery
County, and
2. Discharge from said treatment works at the location specified on the attached map into Densons
Creek, classified C waters in the Yadkin -Pee Dee River Basin.
Page 2of8

Permit NCO028916
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of this permit and lasting until expiration, the Permittee is
authorized to discharge from outfall 001. Such discharges shall be limited and- monitored) by the Permittee as
specified below:
EFFLUENT CHARACTERISTICS
t
a ;''LIMITS` _'
MONITORING REQUIREMENTS
Monthly `
Weekly'
Daily
Measurement
Sampfe
Sampler
Average
Average
Maximum a
Frequency,.f °
T, e . ;
Yp
nLocat�on Z
50050 — Flow
1.2 MGD
Continuous
Recording
I or E
0001.0 - Temperature (°C)
Daily
Grab
E
00310 - BOD, 5-day, 20° C
(April 1-October 31)
7.0 mg/L
10.5 mg/L
3/Week
Composite
E and I
- er I -OD, 5-day, 3) C
(November
(November 1-March 31)
14.0 mg/L
21.0 mg/L
3Meek
Composite
E and I
00530 - Total Suspended Solids 3
30.0 mg/L
45.0 mg/L
3/Week
Composite
E and I
00610 - NH3 as N
(April 1 —October 31)
1.1 mg/L
3.3 mg/L
3/Week
Composite
E
00610 - NH3 as N
(November 1 — March 31)
3.9 mg/L
11.7 mg/L
3/Week
Composite
E
00300 - Dissolved Oxygen 4(mg/L)
3/Week
Grab
E
00300 -- Dissolved Oxygen (mg/L)
Footnote 2
Grab
U,D2
31616 - Fecal Coliform (geometric
mean)
200/100 ml
400/100ml
3/Week
Grab
E
50060 - Total Residual Chlorine 5
20 pg/L
3/Week
Grab
E
00010 — Temperature (°C)
Footnote 2
Grab
U,D2
00094 — Conductivity (pS/cm)
3/Week
Grab
E
00094 — Conductivity (pS/cm)
Footnote 2
Grab
U,D2.
00400 — PH
Not less than 6.0 nor greater than
3/Week
Grab
E
9.0 Standard Units
01092 - Total Zinc s (pg/L)
Quarterly
Composite
E
01042 - Total Copper 6 (Ng/L)
Quarterly
Composite.
E
00940 — Chloride (mg/L)
Quarterly
Composite
E
00600 - Total Nitrogen
Monthly onthly
Composite
E
00665 - Total Phosphorus(mg/L)
Monthly
Composite
E
Chronic Toxicity 5
Quarterly
Composite
E
Effluent Pollutant Scan 7
Monitor and report
Footnote 7
Footnote 7
E
All footnotes are listed on the following page.
Part I, Page 3 of 8

Permit NCO028916
Footnotes:
No later than 270 days from the effective date of this permit, begin submitting discharge
monitoring reports electronically using NC DWR's eDMR application system. See Special
Condition A.(4.).
2. Sample locations: E-Effluent, I -Influent, U-Upstream at least 100 feet, D-Downstream
approximately 0.4 miles before the confluence with Spencer Branch. Stream samples shall be
collected three times per week during June, July, August and September and once per week
during the remaining months of the year. (As a participant in the Yadkin Pee Dee River Basin
Association, the subject. facility is not responsible for conducting the instream monitoring
requirements as stated above. Should your membership in the agreement be terminated, you
shall notify the Division immediately and the instream monitoring requirements specified in
your permit will be automatically reinstated. )
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not
exceed 15 percent of the respective monthly average influent value (85% removal).
4. The daily average dissolved oxygen concentration in the effluent shall not fall below 5.0 mg/L.
5. Limit and monitor only if the facility adds, chlorine or chlorine derivatives to water that is
eventually discharged. The Division shall consider all effluent TRC values reported below 50
ug/l to be in compliance with the permit. However, the permittee shall continue to record and
submit all values reported by a North Carolina certified laboratory (including field certified),
even if these values fall below 50ug/l.
6. Chronic Toxicity (Ceriodaphnia dubia) P/F at 84%: January, April, July, and October (see Part
I, A. (2)). Metals monitoring shall coincide with Toxicity Testing.
7. See Condition A. (3.) of this permit.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Part I,Page4of8

Permit NCO028916
A. (2.) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 84 %.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or subsequent
versions or "North Carolina Phase H Chronic Whole Effluent Toxicity Test Procedure (Revised- December
2010) or subsequent versions. The tests will be performed during the months of January, April, July and
October. These months signify the first month of each three-month toxicity testing quarter assigned to the
facility. Effluent sampling for this testing must be obtained during representative effluent discharge and 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 R Chronic Whole Effluent Toxicity Test Procedure" (Revised -December
2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for
the pass/fail results and TBP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent
to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, North Carolina 27699-1623
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30 days
after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is
employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility duringg-a month in which toxicity monitoring is required,
the permittee will complete the information located at the top of the aquatic toxicity (AT) test form indicating
the facility name, permit number, pipe number, county, and the month/year of the report with the notation of
"No Flow" in the comment area of the form. The report shall be submitted to the Water Sciences Section at the
address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required; monitoring will be
required during the following month. Assessment of toxicity compliance is based on the toxicity testing quarter,
which is the three month time interval that begins on the first day of the month in which toxicity testing is
required by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Resources 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.
Part I,Page 5of8

Permit NCO028916
A. (30) EFFLUENT POLLUTANT SCAN
[G.S. 143-215.1(b)]
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. One
scan must be performed in each of the following years: 2016, 2017 and 2018. The analytical methods shall be in
accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether parameters are
present in concentrations greater than applicable standards and criteria. Samples should be collected with one
quarterly toxicity test each year, and must represent seasonal variation [i.e., do not sample in the same quarter
every year]. Unless otherwise indicated, metals shall be analyzed as "total recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (EPA Method 1631E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1, 1 -dichloroethane
1,2- dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1, 1, 1 -trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-dchlorophenol
2,4-dimethylphenol
4,6-dinitro-o-cresol
2,4-dinitrophenol
2-nitrophenol
4-nitrophenol
Pentachlorophenol
Phenol
2,4, 6-trichlorophenol
Base -neutral compounds:
Acenaphthene
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene .
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno (1, 2, 3 -c d)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
Reporting. Test results shall be reported on DWQ Form -A MR-PPAI (or in a form approved by the
Director) by December 31 st of each designated sampling year. The report shall be submitted to the
following address: NC DENR/DWR/Central Files,1617 Mail Service Center, Raleigh, North
Carolina 27699-1617.
Part I, Page 6 of 8

Permit NC0028.916
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that
Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also
subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.210)(5).
The US EPA requires four (4) toxicity tests for a test organism other than the test species currently
required in this permit. The multiple species tests should be conducted either quarterly for a 12-month
period prior to submittal of the permit renewal application, or four tests performed at least annually in
the four and one half year period prior to the application. These tests shall be performed for acute or
chronic toxicity, whichever is specified in this permit. The multiple species toxicity test results shall be
filed with the Aquatic Toxicology Branch at the following address:
North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1623 Mail Service Center
Raleigh, North Carolina 27699-1623
Contact the Division's Aquatic Toxicology Branch at 919-743-8401 for guidance on conducting the
additional toxicity tests and reporting requirements. Results should also be summarized in Part E
(Toxicity Testing Data) of EPA Municipal Application Form 2A, when submitting the permit renewal
application to the NPDES Permitting Unit.
A. (4.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
[G.S. 143-215.1(b)]
Proposed federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and
specify that, if a state does not establish a system to receive such submittals, then permittees must submit
DMRs electronically to the Environmental Protection Agency (EPA). The Division anticipates that these
regulations will be adopted and is beginning implementation in late 2013.
NOTE: This special condition supplements or supersedes the following sections within Part R of this permit
(Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Reporting
Records Retention
Monitoring Reports
1. Reporting [Supersedes Section D. (2.) and Section E (5) (a)1
Beginning no later than 270 days from the effective date of this permit, the permittee shall begin reporting
discharge monitoring data electronically using the NC DWR's. Electronic Discharge Monitoring Report
(eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring
data and submit DMRs electronically using the internet. Until such time that the state's eDMR application
is compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR), permittees will be
required to submit all discharge monitoring data to the state electronically using eDMR and will be required
to complete the eDMR submission by printing, signing, and submitting one signed original and a copy of
the computer printed eDMR to the following address:
Part I,Page 7of8

Permit NCO028916
NC DENR / DWR / Information Processing Unit
ATTENTION: Central Files / eDMR
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility being
physically located in an area where less than 10 percent of the households have broadband access, then a
temporary waiver from the NPDES electronic reporting requirements may be granted and discharge
monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or alternative forms approved by
the Director. Duplicate signed copies shall be submitted to the mailing address above.
Requests for temporary waivers from the NPDES electronic reporting requirements must be submitted in
writing to the Division for written approval at least sixty (60) days prior to the date the facility would be
required under this permit to begin using eDMR. Temporary waivers shall be valid for twelve (12) months
and shall thereupon expire. At such time, DMRs shall be submitted electronically to the Division unless the
permittee re -applies for and is granted a new temporary waiver by the Division.
Information on eDMR and application for a temporary waiver from the NPDES electronic reporting
requirements is found on the following web page:
http://portal.nedenr.ory/web/wq/admin/bog/ipu/edmr
Regardless of the submission method, the first DMR is due on the last day of the month following the
issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
2. Signatory Requirements [Supplements Section B. (11.) (b) and supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part 11,
Section B. (11.)(a) or by a duly authorized representative of that person as described in Part 11, Section B.
(11.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account
and login credentials to access the eDMR system. For more information on North Carolina's eDMR
system, registering for eDMR and obtaining an eDMR user account, please visit the following web page:
http://portal.ncdenr.or web/wq/admin/bog/ipu/ed=
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL BE
ACCEPTED:
V certify, under penalty of law, that this document and all attachments were prepared under my direction
or supervision in accordance with a system designed to assure that qualifiedpersonnelproperly gather and
evaluate the information submitted. Based on my inquiry of the person or persons who manage the system,
or those persons directly responsible for gathering the information, the information submitted is, to the best
of my knowledge and belief, true, accurate, and complete. I am aware that there are significant penalties
for submittingfalse information, including the possibility offines and imprisonment for knowing
violations. "
3. Records Retention [Supplements Section D. (6.)l
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions.
These records or copies shall be maintained for a period of at least 3 years from the date of the report. This
period may be extended by request of the Director at any time [40 CFR 122.41].
Part I,Page 8of8

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Town of Troy
Facility
Latitude:
Troy WWTP
350 22' 37.43" N 8-digit HUC: 03040104
Location
not to scale
Longitude:
Receiving Stream:
79° 51' 32.45" W Permitted Flow: 1.2 MGD
Densons Creek Sub -Basin: 03-07-15
=rth
NPDES Permit No. NC0028916
Drainage Basin:
Yadkin Pee -Dee River Basin Stream Class: C
Montgomery County

Song, .Yang
From: joseph shields <[e-mail]>
Sent: Monday, April 27, 2015 11:23 AM
To: Song, Yang
Subject: Troy Permit
I have read the draft and have only. one suggestion. We would prefer the toxicity schedule remain the same ie January April July October.
The current schedule our metals are sampled concurrent with tox and the Hg 1631 is off set to run the last month of each quarter. The first month of the quarter we
run Hg EPA 245.1 that way we are not reporting two Hg results in the same month.
Changing the toxicity schedule changes a.lot more than just tox.
Since we are almost a year into the new permit what will the effective date be for these changes be?
JE Shields
Director
Town of Troy POTW

The Charlotte Observer Publishing Co.
Charlotte, NC
North Carolina } ss Affidavit of Publication
Mecklenburg County }
Charlotte Observer
REFERENCE: 145583 NCDENR/DWQ/POINT SOURCE
0001695630 Public Notice North Carolina Environmental
Management Commission/NPDES Unit 1617
Mail Service Center Raleigh, NC 27699-1617
Before the undersigned, a Notary Public of said County and
State, duly authorized to administer oaths affirmations, etc.,
personally appeared, being duly sworn or affirmed according
to law, doth depose and say that he/she is a representative of
The Charlotte Observer Publishing Company, a corporation
organized and doing business under the laws of the State of
Delaware, and publishing a newspaper known as The
Charlotte Observer in the city of Charlotte, County of
Mecklenburg, and State of North Carolina and that as such
he/she is familiar with the books, records, files, and business
of said Corporation and by reference to the files of said
publication, the attached advertisement was inserted. The
following is correctly copied from the books and files of the
aforesaid Corporation and Publication.
PUBLISHED ON: 04/24/2015
AD SPACE: 39 LINES
FILED ON: 05/05/2015
NA
PUBLIC NOTICE
North Carolina Environmental Management
Commission/NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
Notice of Intent to Issue a NPDES
Wastewater Permit
The North Carolina Environmental
Management Commission proposes to
issue a NPDES wastewater discharge
permit to the person(s) listed below. Written
comments regarding the proposed permit
will be accepted until 30 days after the
publish date of this notice. The Director of
the NC Division of Water Resources (DWR)
may hold a public hearing should there be a
significant degree of public interest. Please
mail comments and/or information requests
to DWR at the above address. Interested
persons may visit the DWR at 512 N.
Salisbury Street, Raleigh, NC to review
information on file. Additional information on
NPDES permits and this notice may be
found on our website:
hap://portal.ncdenr.org/web/wq/swp/ps/npd
es/calendar, or by calling [phone].
The Town of Troy requested renewal of
Permit NCO028916 for its Troy WWiP in
Montgomery County; this permitted
discharge is treated municipal and industrial
wastewaters to Densons Creek, Yadkin -Pee
Dee River Basin.
1695630
TITLE:
DATE: MAY 0 8 ZOIS
In Testimo Whereof I have hereunto set my hand and affixed my seal, the day and year aforesaid.
Nota _�,,�_ /�i2/—�4' //%�.r!�1�1 My commission Expires:
My Commission Expires May 27, 2016

DENR/DWR
FACT SHEET FOR NPDES PERMIT RENEWAL
NPDES No. NCO028916
Facility Information
Applicant/Facility Name:
Town of Troy / Troy WWTP
Applicant Address:
315 North Main Street, Troy, NC 27371
Facility Address:
650 Glen Road, Troy, NC 27371
Permitted Flow
1.2 MGD
Type of Waste:
Domestic and industrial with pretreatment program
Facility/Permit Status:
Class III /Active; Renewal
County:
Montgomery County
Miscellaneous
Receiving Stream:
Densons Creek
Regional Office:
Fayetteville (FRO)
Stream Classification:
C
8-digit HUC:
03040104
303(d) Listed?
No
Permit Writer:
Yang Son
Subbasin/ Stream Index:
03-07-15/13-25-20-(9)
Date:
April 22, 2015
Drainage Area (mi2):
32
Lat. 35° 22° 37" N Long. 79° 51' 32" W
s7Q10 (cfs)
0.35
w7Q 10 (cfs)
2.42
Average Flow (cfs):
32
IWC (%):
84% @ 1.2 MGD
Background
The Town of Troy has requested renewal of its NPDES permit NCO028916 which has a design
flow of 1.2 MGD. The plant serves approximately 4,500 people in the Town of Troy. The
application for permit renewal (Form 2A) was received on December 2, 2013. The permit
expired on June 30, 2014 and has been administratively extended. The Town has one non -
categorical SILT, Wright Foods, which manufactures fruits and vegetables into flexible packaging
for retail. The Town of Troy currently has an active compliant pretreatment program with a Short
Term Monitoring Plan (STMP). Four effluent pollutant scans were performed annually from
2010 to 2013. The facility did not request any modification to the permit during this renewal. The
Water Quality Permit WQ0001240 was rescinded on December 2, 2014 and the WWTP sludge
has been sent to the Uwhrrie Environmental Landfill since then.
The Troy WWTP utilizes activated sludge to treat municipal wastewater. As the wastewater
enters the plant, it flows through a "low flow" type mechanical bar screen, then to an aerated grit
chamber and grit removal system. The wastewater then flows through two oxidation ditches in
series followed by two secondary clarifiers. From this point, treated wastewater goes through an
Ultra Violet (UV) disinfection light bank and is discharged to Densons Creek; the sludge is either
returned to aeration ditches or transferred to an aerobic digester.
This facility is located in Subbasin 03-07-15 and discharges to Densons Creek, classified C
waters in the Yadkin -Pee Dee River Basin. The receiving stream is not listed on the 2014 303(d)
list as impaired, and the basin plan does not outline any special management strategy for this
creek. The Town of Troy joined the Yadkin -Pee Dee River Basin Association (YPDRBA) in
Fact Sheet — Town of Troy 2015 Renewal
NPDES Permit NCO028916
Page 1

October 2014. It should be noted that the headwaters of Densons Creek, located about 1 mile
upstream from the WWTP, are designated as HWQ.
Waste Load Allocation (WLA)
The Division prepared the last WLA model for the receiving stream in 1999. The permit effluent
limits for BOD5 at 1.2 MGD were based on this WLA.
Current Effluent Characteristics
The Troy WWTP's average flow was 0.63 MGD during the calendar year of 2014, which
represents 52% of the permitted flow. Monthly average flows ranged from 0.43 MGD to 0.86
MGD.
Table 1. Average and maximum effluent data collected from 1/2012 through 12/2014.
Parameter
Flow
BOD5
Total
Suspended
Solids
Ammonia
Nitrogen
Total Nitrogen
Total Phosphorus
(MGD)
(mg/L)
(mg/L)
(mg/L)
(mg/L)
(mg/L)
average
0.60
2.65 S/2.9 W
5.76
0.16 S/ 0.15 W
22.25
2.19
maximum
2.7
9.1 S/.13.6 W
79
4.9 S/ 3.3 W
45.4
4.5
Limit MA
1.2
7 S/ 14 W
30
2 S/ 4 W
Table 1 (continued)
Parameter
Total Copper
Total Zinc
Chloride
Fecal Coliform
DO
(µg/L)
(µg/L)
(mg/L)
(W100ml)
(mg/L)
Average
16.44
87.87
104.1
27.16
8.53
maximum
94
199
223
790
6.1 (minimum)
Limit (MA)
200/100 ml
Evaluation of Compliance Data
Discharge Monitoring Reports (DMRs) have been reviewed for the period of January 2010
through December 2014. There was one limit violation for pH in 2013. It appeared to be an error
in reporting and no action was taken.
A recent staff report done by Mark Brantley of the FRO was received on September 10, 2014. No
significant issues or findings were noted. The FRO has conducted five (5) Compliance and five
(5) Pretreatment inspections since the existing permit was issued on January 1, 2010. These
inspections have found the facility to be in compliance.
Toxicity Testing: Since January 2010 the facility has passed 20 of 20 chronic toxicity tests and 4
fathead' minnow second species tests.
Evaluation of Instream Data
Instream monitoring data for temperature from January 2012 through December 2014 was
reviewed. In late 2012 and early 2013 there were three instances where the temperature increase
from upstream to downstream exceeded 2.8 T. No exceedances were reported in 2014. The
Region was notified about these violations and will track upstream and downstream samples
more closely.
In addition, upstream and downstream DO values were all above the daily average water quality
standard of 5 mg/l during the winter period of 2012 - 2014 (November through March).
However, during the summer periods of 2011 and 2012 (April through October), upstream
average DO concentrations fell below the minimum instantaneous value of 4 mg/L, 16 times
Fact Sheet - Town of Troy 2015 Renewal
NPDES Perniit NCO028916
Page 2

each summer. In addition, the downstream DO concentrations fell below 4 mg/L, 27 times in
2011 and 21 times in 2012. In 2013 there were no DO violations upstream or downstream of the
WWTP. In 2014 there were no upstream violations but the downstream samples fell below 4
mg/L on 10 occasions during the summer period. The WWTP had no permit limitation violations
(DO, BOD5 or Fecal Coliform) during the period of 2011 through 2014. It is difficult to conclude
whether the increased DO violations downstream of the WWTP are caused by the WWTP
effluent or a naturally occurring problem caused by the Troy reservoir upstream. The DO
violations will be brought to the attention of DWR's Water Sciences Section to see if impairment
should be assessed in this segment of the receiving stream.
A comparison of upstream and downstream conductivity data during the period of 2012 - 2014
showed significant increases in the downstream conductivity. The Troy WWTP effluent did
show significantly higher levels of conductivity than the upstream data. The WWTP effluent
does appear to be impacting the downstream conductivity. Although the WWTP effluent samples
passed all toxicity tests, the data raises attention on this parameter.
Note, that in October 2014 the Town of Troy joined the YPDRBA. As a result, instream
monitoring requirements are waived so long as the Permittee maintains full and active
membership in the YPDRBA. The Ambient Monitoring System (AMS) program monitors
the Little River about 3.5 miles upstream of where Densons Creek enters and at the last
road crossing before the confluence with the Pee Dee River. These stations will continue to
supply some data on the upstream and downstream water quality.
Reasonable Potential (RP) Analysis
The Division conducted EPA -recommended analyses to determine the reasonable potential for
toxicants to be discharged by this facility, based on DMR data from January 2012 through
December 2014. Effluent samples for arsenic, cadmium, cyanide, lead, and silver showed all
parameters were less than detection levels.
Reasonable potential analyses were conducted for chlorides, chromium, copper, molybdenum,
nickel, selenium, and zinc. See attached RPA results and data.
• Chlorides — effluent data showed no reasonable potential to exceed state water quality
standards; however, the maximum predicted concentration was greater than 50% of the
allowable allocation (permit limit). It is recommended that chloride monitoring remain_ in
the permit with a monitoring frequency of quarterly.
• . Chromium effluent data showed no reasonable potential to exceed state water quality
standards; however, the maximum predicted concentration was greater than 50% of the
allowable allocation. Quarterly monitoring for chromium will continue as part of the.
Pretreatment Short Term Monitoring Program (STMP).
• Copper and Zinc — the maximum predicted values for copper and zinc demonstrated a
reasonable potential to exceed both the chronic and acute allowable concentrations.
However, both have action level standards and are reviewed in conjunction with toxicity
testing results: The facility has passed all toxicity tests since January 2010; therefore,
copper and zinc monitoring was maintained in the permit with the monitoring frequency
reduced to quarterly.
• Molybdenum and Nickel— effluent data showed no potential to violate water quality
standards and the maximum predicted concentration was less than 50% of the allowable
allocation. No permit limitation is required.
Fact Sheet — Town of Troy 2015 Renewal
NPDES Permit NCO028916
Page 3

Selenium — effluent samples were all < 10 ug/L or < 2 ug/L. The chronic allowable
allocation for selenium is 5.9 ug/L. The Permittee will be notified that in accordance with
NC Administrative Code Section 15A NCAC 02B .0500, all test procedures must
produce detection and reporting levels that are below the permit discharge requirements
and all data generated must be reported to the approved detection level or lower reporting
level of the procedure. DWR's Water Sciences Section has determined that the Practical
Quantitation Limit for selenium is 5 ug/L.
Quarterly monitoring for arsenic, cadmium, chromium, copper, cyanide, lead, mercury,
molybdenum, nickel, silver, selenium, and zinc will continue as part of the Town's Pretreatment
STMP.
Effluent Pollutant Scans
Effluent pollutant scans were performed in the 2nd quarter of 2010, the 4th quarter of 2011, the 3rd
quarter of 2012, and the 1" quarter of 2013. Data from these annual effluent pollutant scans was
evaluated and antimony, thallium, and total phenolic compounds were detected in addition to
some of the metals. However, none of the metals detected were greater than the concentrations
analyzed in the RPA discussed above. Antimony and total phenolic compounds were detected at
levels less than the HH standard and the NC Aesthetic WQS, respectively.
• Thallium — One sample was detected at 9 ug/L and the EPA Human Health (HH)
standard is 0.47 ug/L. Three other samples were taken and all samples were < 20 ug/L.
DWR's Water Sciences Section has determined that the Practical Quantitation Limit for
thallium is 10 ug/L. The Permittee will be notified that in accordance with 02B .0500, all
test procedures must produce detection and reporting levels that are below the permit
discharge requirements and all data generated must be reported to the approved detection
level or lower reporting level of the procedure. Since this is a limited data set with one
value greater than the allowable concentration but less than the PQL, monitoring for
thallium shall continue as part of the effluent pollutant scans and all data generated must
be reported to the approved detection level or lower reporting level of the procedure (10
ug/4
Mercury TMDL Evaluation
Low level effluent mercury data was reviewed from January 2010 to December 2014. In
accordance with the 2012 Mercury TMDL NPDES Guidance the permittee needs to show annual
mean effluent concentrations below both the Water Quality Based Effluent Limitation (WQBEL)
of 14.3 ng/L and the Technology Based Effluent Limitation (TBEL) of 47 ng/L. A review of the
data showed that the annual averages were below both the WQBEL and the TBEL, therefore, no
mercury limitation is required. The permittee will be required to continue monitoring mercury as
part of its effluent pollutants scans, using EPA test method 1631 E.
Ammonia -Nitrogen
In accordance with an agreement with EPA Region IV, wasteload allocations for ammonia -
nitrogen are based on a summer criterion of 1 mg/L and a winter criterion of 1.8 mg/L. Since the
WWTP is provided low dilution from the receiving stream, the monthly average effluent limits
determined for the Troy WWTP are 1.1 mg/L in the summer and 3.9 mg/L in the winter. Using a
3:1 ratio the weekly average limits for NH3-N should be 3.3 mg/L in the summer and 11.7 mg/L
in the winter. The permit renewal was revised to include these limitations. A review of effluent
data during the period of 2012 through 2014 shows the WWTP is able to meet these NH3-N
limitations.
Fact Sheet — Town of Troy 2015 Renewal
NPDES Permit NC0028916
Page 4

Basis for Permit Effluent Limits
Effluent Cliaracten'stics ; a
LIMITS
RATIONALE FOR LIMITATION
Monthly
Weekly
�Dally..
a
Average,
`Average
=Maximum
50050 - Flow
1.2 MGD
15A NCAC 02B .0400 et seq., 02B .0500 et seq.
00010 - Temperature (°C)
Monitor and report - effluent
Administrative Code 15A NCAC 02B .0211
00310 - BOD, 5-day, 200 C
7.0 mg/L
10.5 mg/L
WLA Model in 1999
(April 1-October 31)
00310 = BOD, 5-day, 201 C
14.0 mg/L
21.0 mg/L
WLA Model in 1999
(November 1-March 31)
00530 - Total Suspended Solids
30.0 mg/L
45,.0 mg/L
Administrative Code 15A NCAC 02B .0406 for
Municipal Wastewaters
00610 - NH3 as N
1.1 mg/L
3.3 mg/L
WLA Calculation in 2015
(April 1 - October 31)
00610 - NH3 as N
3.9 mg/L
11.7 mg/L
WLA Calculation in 2015
(November 1 - March 31) .
00300 - Dissolved Oxygen (mg/L)
Monitor and report - effluent
Administrative Code 15A NCAC 02B .0211
31616 -'Fecal Coliform (geometric
200/100
400/100ml
Administrative Code 15A NCAC 02B
mean)
ml
.0211
50060 - Total Residual Chlorine
20 pg/L
Administrative Code 15A NCAC 02B .0211 with
an allowance for dilution
Temperature, Conductivity and
Upstream and Downstream
15A NCAC 02B .0500 et seq.
Dissolved Oxygen
Monitoring
00094 - Conductivity (pS/cm)
Monitor and report - effluent
1'5A NCAC 02B .0500 et seq.
00400 - PH
6.0 - 9.0 Standard Units
Administrative Code 15A NCAC 02B .0211
01092 - Total Zinc (pg/L)
Monitor and report - effluent
Administrative Code 15A NCAC 02B .0211, RPA
01042 - Total ,Copper (pg/L)
Monitor and report - effluent
Administrative Code 15A NCAC 0213.0211, RPA
00940 - Chloride (mg/L)
Monitor and report - effluent
15A NCAC 02B .0211, RPA
00600 - Total Nitrogen
(NO2+NO3+TKN)(mg/L)
Monitor and report- effluent
15A NCAC 02B .0500 et seq.
00665 - Total Phosphorus(mg/L)
Monitor and report - effluent
15A NCAC 02B .0500 et seq.
Chronic Toxicity
Monitor and report - effluent
15A NCAC 02B .0200 et seq.
Effluent Pollutant Scan
Monitor and report - effluent
G.S. 143-215.1(16)
Summary of Proposed Changes
The following permit changes are proposed for this permit renewal:
1. Addition .of electronic DMR requirement.
2. Wavier of instream monitoring - The Town of Troy joined the YPDRBA.
3. Modification of Ammonia -Nitrogen monthly average and weekly average permit limits.
4. Reduced monitoring frequency requirements for copper, zinc and chloride to quarterly.
5. .Addition of revised Effluent Pollutant scan specifying three years of sampling and 2nd species
testing requirements.
6. Addition of revised Toxicity testing language.
Fact Sheet - Town of Troy 2015 Renewal
NPDES PermitN00028916
Page 5

Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: April 29, 2015 (estimate)
Permit Scheduled to Issue: June 15, 2015 (estimate)
NPDES Division Contact
If you have questions regarding any of the above information or on the attached permit, please contact
Yang Song at [phone] or by email at yang songgncdenr.gov.
NAME: �t - -/► FCL� DATE: 0JT1 fqZ
Comments
No comments were received from Region IV EPA or the FRO — Surface Water Protection. Troy WWTP ORC
Joseph Shields made the comments to change toxicity test schedule to January, April, July, and October.
Fact Sheet - Town of Troy 2015 Renewal
NPDES Permit NC0028916
Page 6

Town of Troy WWTP Outfall 001
NCOO28916 2014 Freshwater RPA - 95% Probability/95% Confidence Qw = 1.2 MGD
MAXIMUM DATA POINTS = 58
Qw (MGD) = 1.20
1QIOS (cfs)= 0.30
7QIOS (cfs) = 0.35
7QIOW (cfs) = 2.42
30Q2 (cfs)= NO 30Q2 DATA
Avg. Stream Flow, QA (cfs) = 32.00
Receiving Stream: Densons Creek
WWTP/WTP Class: Class III
)WC @ IQ10S = 86.111111%
IWC @ 7Q10S = 84.162896%
IWC @ 7Q10W = 43.457944%
IWC @ 30Q2 = NIA
IWC @ QA = 5.493207%
Stream Class: C
PARAMETER
STANDARDS & CRITERIA (2)
N
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
(1)
�
nO
F
NC WQS / Applied /z FAV /
Max Pred
11 # Det. Allowable Cw
Chronic Standard Acute
Cw
Acute: NO WQS
Arsenic
C
50 FW(7Q10s)
ug/L
0 0
N/A
—
Chronic: 59.4
All samples are less than 10 ug/L or 2 ug/L
Arsenic
C
10 HH/WS(Qavg)
ug/L
0 0
N/A
Chronic: 182.0
All samples are less than 10 ug/L or 2 uglL.
Acute: NO WQS
Beryllium
NC
6.5 FW(7QIOs)
ug/L
0 0
N/A
Chronic------7.7---
--------------------------
Acute: 17.4
Cadmium
NC
2 FW(7Q]Os) 15
ug/L
0 0
N/A
All samples are less than 2 ug/L
_ _____ ___
Chronic: 2.4
_ _ _ _ _ _ _ __________
All samples are less than 2 ug/L.
Acute: NO WQS
Chlorides (AL)
NC
230 FW(7Q10s)
mg/L
58 58
223
_ _ _ _
Chronic: 273
No RP ,Predicted Max >_ 50% of Allowable Cw -
No value > Allowable Cw
apply Quarterly Monitoring
Acute: 1,186.8
Chromium
INC
50 FW(7Q10s) 1022
ua/L
17 2
54.3
Chronic: 59.4
No RP , Predicted Max = 50% of Allowable Cw -
No value > Allowable Cw
defer to LTMP
Acute: 8.5
Copper (AL)
NC
7 FW(7Q10s) 7.3
ug/L
53 53
96.8
Chronic: 8.3
_
RP for AL(Cu,Zn,Ag,Fe,CI) apply Quarterly
47 value(s)> Allowable Cw
Monitoring in conjunction with TOX Test
Acute: 25.5
Cyanide
NC
5 FW(7QIOs) 22
10
ug/L
0 0
N/A
Chronic: 5.9
All samples are less than 5 ug/L.
Acute: NO WQS
Fluoride
NC
1800 FW(7Q10s)
ug/L
0 0
N/A
Chronic:----2,138.7 -
--------------------------
Acute: 39.3
i...'.' Lead
INC
25 FW(7Q10s) 33.8
ug/L
0 0
N/A
All samples are less than 10 ug/L or 5 ug/L.
—
Chronic: — - — 29.7 —
— — — — — — — — — — — — —
NCO028916-RPA1,rpa
Page 1 of 2 3/17/2015

Town of Troy WWTP Outfall 001
NCO028916 2014 Freshwater RPA - 95% Probability/95% Confidence Ow = 1.2 MGD
Acute: NO WQS
Molybdenum
NC
2000 HH(7QIOs)
u,/L
la 2
10.6
_ __ _ _ _
Chronic 2,376.3
No RP, Predicted Max < 50%of Allowable Cw - No
No value > Allowable Cw
Monitoring required
Acute: 303.1
Nickel
NC
88 FW(7QIOs) 261
ug/L
15 15
5.0
Chronic: 104.6
No RP, Predicted Max < 50 % of Allowable Cw - No
No value > Allowable Cw
Monitoring required
Acute: 65.0
Selenium
NC
> FW(7Q10s) 56
ugL
14 0
6.0
All samples are less than 10 ug/L or 2 ug1L.
_ _ _____ ___
Chronic: 5.9
_ _ _ _ _ _ _ _ __ _ _
Quarterly Monitoring will be continued to be part of
No value > Allowable Cw
LTMP.
Acute: 1.428
Silver (AL)
NC
0.06 FW(7QlOs) 123
ug/L
0 0
N/A
Chronic: 0.071
All samples are less than 5 ug/L.
Acute: 77.8
Zinc (AL)
NC
50 FW(7Q10s) 67
ug/L
53 53
128.3
_
Chronic: 59.4
_
RP for AL(Cu,Zn,Ag,Fe,CI) apply Quarterly
43 values > Allowable Cw
Monitoring in conjunction with TOX Test
Acute: NO WQS
Thallium
NC
0.47 HH(7Q10s)
µg/I
4 1
25.9
three samples < 20 ug/L and one at 9 ug/L
Note: n < 9
Default C.V.
__ _ _______ ____
Chronic 0.56
_ _ _ _
Limited Dataset (n<8 samples) with one value greater
than the allowable concentration but less than the
POL, apply monitoring in con)uction with effluent
pollutant scans
Acute:
0 0
N/A
_
Chronic-----
--------------------------
Acute:
0 0
N/A
_
Chronic-----------
----------- --------------
Acute:
0 0
N/A
_
Chronic:--
------------------------
NCO028916-RPA1,rpa
Page 2 of 2 3/17/2015

5
Date Data
1 10/16/2012
2 11/6/2012
3 11 /20/2012
4 12/4/2012
5 12/18/2012
6 1/2/2013
7 1/15/2013
8 2/5/2013
9 2/19/2013
10 3/5/2013
11 3/19/2013
12 4/2/2013
13 4/16/2013
14 5/7/2013
15 5/14/2013
16 5/21/2013
17 6/4/2013
18 6/18/2013
19 6/25/2013
20 7/1/2013
21 7/10/2013
22 7/16/2013
23 7/23/2013
24 7/30/2013
25 8/6/2013
26 8/20/2013
27 9/3/2013
28 9/17/2013
29 10/1 /2013
30 10/15/2013
31 11/5/2013
32 11/20/2013
33 12/3/2013
34 12/17/2013
35 1 /22/2014
36 1 /27/2014
37 2/4/2014
38 2/18/2014
39 3/4/2014
40 3/18/2014
41 4/1/2014
42 4/15/2014
43 5/6/2014
44 5/20/2014
45 6/3/2014
46 6/17/2014
47 7/1/2014
48 7/15/2014
49 8/5/2014
50 8/19/2014
51 9/2/2014
52 9/17/2014
53 10/7/2014
54 10/21 /2014
55'' 11/4/2014
5611/18/2014
57 12/2/2014
58 12/17/2014
REASONABLE POTENTIAL ANALYSIS
8
Use "PASTE SPECIAL -
Chlorides (AL) Values" then "COPY". Chromium
Maximum data points
58
BDL=1/2DL Results
126 126 Std Dev.
223 223 Mean
189 189 C.V.
86.5 86.5 n
77.8 77.8
48.8 48.8 MultFactor=
105 105 Max. Value
106 106 Max. Pred Cw
112 112
96 96
103 103
ill ill
118 118
85 85
80 80
91.7 91.7
107 107
48.8 48.8
38 38
31.6 31.6
62 62
71.6 71.6
125 125
58 58
68 68
78.1 78.1
119 119
69.8 69.8
183 183
147 147
168 168
92.7 92.7
78.5 78.5
116 116
103 103
76.8 76.8
98.3 98.3
84.1 84.1
130 130
48 48
4Z9 47.9
72.1 72.1
75.3 75.3
99.8 99.8
118 118
109 109
85.4 85.4
81.2 81.2
153 153
86.1 86.1
214 214
118 118
99 99
119 119
159 159
104 104
ill ill
99 99
101.9
0.3921
58
1.0
223.0 mg/L
223.0 mg/L
Date
Data
BDL=1/2DL
Results
1
1/3/2012
<
2
1
Sid Dev.
2
4/3/2012
<
5
2.5
Mean
3
7/3/2012
<
5
2.5
C.V.
4
10/2/2012
<
5
2.5
n
5
11/6/2012
27
27
6
11/20/2012
19
19
Mult Factor =
7
1/2/2013
<
5
2.5
Max. Value
8
4/2/2013
<
5
2.5
Max. Pred Cw
9
614/2013
<
5
2.5
10
7/1/2013
<
5
2.5
11
8/6/2013
<
5
2.5
12
9/3/2013
<
5
2.5
13
10/1/2013
<
5
2.5
14
1 /7/2014
<
5
2.5
15
4/1/2014
<
5
2.5
16
7/1/2014
<
5
2.5
17
10/7/2014
<
5
2.5
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use"PASTE SPECIAL
Values" then "COPY"
Maximum data
points = 58
6.9954
4.8235
1.4503
17
2.01
27.0 ug/L
54.3 ug/L
wz
NC0028916-RPA1, data
4/21 /2015

REASONABLE POTENTIAL ANALYSIS
9 1 1 14
Copper (AL)
Date Data
BDL=1/2DL
Results
1
1/2/2013
17
17
Std Dev.
2
1/15/2013
13
13
Mean
3
2/5/2013
12
12
C.V.
4
2/19/2013
14
14
n
5
3/5/2013
16
16
6
3/19/2013
11
11
Mult Factor =
7
4/2/2013
18
18
Max. Value
8
4/16/2013
24
24
Max. Pred Cw
9
5/7/2013
25
25
10
5/14/2013
20
20
11
5/21/2013
12
12
12
6/4/2013
10
10
13
6/18/2013
24
24
14
6/25/2013
16
16
15
7/1/2013
19
19
16
7/10/2013
12
12
17
7/16/2013
11
11
18
7/23/2013
15
15
19
7/30/2013
11
11
20
8/6/2013
16
16
21
8/20/2013
13
13
22
9/3/2013
17
17
23
9/17/2013
11
11
24
10/1 /2013
19
19
25
10/15/2013
27
27
26
11 /5/2013
16
16
27
11 /20/2013
14
14
28
12/3/2013
8
8
29
12/17/2013
9
9
30
1/7/2014
9
9
31
1/22/2014
6
6
32
2/4/2014
8
8
33
2/18/2014
9
9
34
3/4/2014
8
8
35
3/18/2014
8
8
36
4/1/2014
10
10
37
4/15/2014
12
12
38
5/6/2014
22
22
39
5/20/2014
22
22
40
6/3/2014
15
15
41
6/17/2014
23
23
42
7/1/2014
15
15
43
7/15/2014
13
13
44
8/5/2014
13
13
45
8/19/2014
94
94
46
9/2/2014
18
18
47
9/17/2014
14
14
48
10/7/2014
19
19
49
10/21 /2014
10
10
50
11 /4/2014
10
10
51
11/18/2014
12
12
52
12/2/2014
11
11
53
12/17/2014
7
7
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
12.0656
15.8113
0.7631
53
1.03
94.0 ug/L
96.8 ug/L
Molybdenum
Date
Data
BDL=1/2DL
Results
1
1/3/2012
<
2
1
Std Dev.
2
4/3/2012
<
5
2.5
Mean
3
7/2/2012
<
5
2.5
C.V.
4
10/2/2012
<
5
2.5
n
5
1/2/2013
<
5
2.5
6
4/2/2013
<
5
2.5
Mult Factor =
7
7/1/2013
<
5
2.5
Max. Value
8
8/6/2013
<
5
2.5
Max. Fred Cw
9
9/3/2013
<
5
2.5
10
10/1/2013
<
5
2.5
11
1/7/2014
<
5
2.5
12
4/1/2014
<
5
2.5
13
7/1/2014
7
7
14
10/7/2014
7
7
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
1.7261
3.0357
0.5686
14
1.51
7.0 ug/L
10.6 ug/L
-3-
NC0028916-RPA1, data
4/21 /2015

REASONABLE POTENTIAL ANALYSIS
15
Nickel
iUse "PASTE SPECIAL
+Values" then "COPY"
16
Selenium
. Maximum data
_
points = 58
Date
Data
BDL=1/2DL
Results
Date
Data
BDL=1/2DL
Results
1
1/3/2012
5.0
5
Std Dev.
0.0000
1
1/3/2012
<
2
1
Std Dev.
2
4/3/2012
<
10.0
5
Mean
5.0000
2
4/3/2012
<
10
5
Mean
3
7/3/2012
<
10.0
5
C.V.
0.0000
3
7/2/2012
<
10
5
C.V.
4
10/2/2012
<
10.0
5
n
15
4
10/2/2012
<
10
5
n
5
1/2/2013
<
10.0
5
5
1/2/2013
<
10
5
6
4/2/2013
<
10.0
5
Mult Factor =
1.00
6
4/2/2013
<
10
5
Mult Factor =
7
6/4/2013
<
10.0
5
Max. Value
5.0 ug/L
7
6/4/2013
<
10
5
Max. Value
8
711/2013
<
10.0
5
Max. Fred Cw
5.0 ug/L
8
7/1/2013
<
10
5
Max. Pred Cw
9
8/6/2013
<
10.0
5
9
8/6/2013
<
10
5
10
9/3/2013
<
10.0
5
10
9/3/2013
<
10
5
11
10/1/2013
<
10.0
5
11
10/1/2013
<
10
5
12
1/7/2014
<
10.0
5
12
1/7/2014
<
10
5
13
4/1/2014
<
10.0
5
13
4/1/2014
<
10
5
14
7/1/2014
<
10.0
5
14
7/1/2014
<
10
5
15
10/7/2014
<
10.0
5
15
16
16
17
17
18
18
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41
41
42
42
43
43
44
44
45
45
46
46
47
47
48
48
49
49
50
50
51
51
52
52
53
53
54
54
55
55
56
56
57
57
58
58
Use "PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
1.0690
4.7143
0.2268
14
1.19
5.0 ug/L
6.0 ug/L
NC0028916-RPA1, data
-4- 4/21 /2015

REASONABLE POTENTIAL ANALYSIS
18
Zinc (AL)
Date
Data
BDL=1/2DL
Results
1
1/2/2013
81
81
Std Dev.
2
1/15/2013
118
118
Mean
3
2/5/2013
94
94
C.V.
4
2/19/2013
78
78
n
5
3/5/2013
84
84
6
3/19/2013
101
101
Mult Factor =
7
4/2/2013
83
83
Max. Value
8
4/16/2013
71
71
Max. Pred Cw
9
5/7/2013
62
62
10
5/14/2013
75
75
11
5/21/2013
52
52
12
6/4/2013
68
68
13
6/18/2013
71
71
14
6/25/2013
38
38
15
7/1/2013
41
41
16
7/10/2013
42
42
17
7/16/2013
58
58
18
7/23/2013
62
62
19
7/30/2013
35
35
20
8/6/2013
60
60
21
8/20/2013
67
67
22
9/3/2013
88
88
23
9/17/2013
119
119
24
10/1/2013
96
96
25
10/15/2013
107
107
26
11 /5/2013
121
121
27
11 /20/2013
127
127
28
12/3/2013
124
124
29
12/17/2013
97
97
30
1/7/2014
71
71
31
1/22/2014
96
96
32
2/4/2014
106
106
33
2/18/2014
64
64
34
3/4/2014
59
59
35
3/18/2014
60
60
36
4/1/2014
87
87
37
4/15/2014
82
82
38
5/6/2014
121
121
39
5/20/2014
68
68
40
6/3/2014
82
82
41
6/17/2014
92
92
42
7/1/2014
108
108
43
7/15/2014
113
113
44
8/5/2014
67
67
45
8/19/2014
11
11
46
9/2/2014
55
55
47
9/17/2014
56
56
48
10/7/2014
96
96
49
10/21/2014
90
90
50
11/4/2014
73
73
51
11/18/2014
112
112
52
12/2/2014
119
119
53
12/17/2014
108
108
54
55
56
57
58
Use"PASTE SPECIAL
Values" then "COPY"
. Maximum data
points = 58
81.4340
0.3237
53
1.01
127.0 ug/L
128.3 ug/L
19
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Thallium
Values" then "COPY"
Maximum data
points = 58
Date Data
BDL=1/2DL
Results
10/1/2011
9
9
Std Dev.
0.5000
1/1/2013 <
20
10
Mean
9.7500
8/1/2012 <
20
10
C.V. (default)
0.6000
4/1/2010 <
20
10
n
4
Mult Factor =
2.59
Max. Value 10.000000 Ng/L
Max. Pred Cw 25.900000 Ng/L
-5-
NC0028916-RPA1, data
4/21 /2015

3/17/15 WQS = 12
Facility. Name
Troy WWTP/ NC0028916
/Permit No.
Total Mercury 1631E PQL = 0.5 ng/L
Date Modifier Data Entry
ng/L
Value
MERCURY WQBEL/TBEL EVALUATION V:2013-6
No Limit Required
No MMP Required
7Q10s = 0.250 cfs WQBEL = 13.61 ng/L
Permitted Flow = 1.200 TBEL= 47 ng/L
6/18/10
2.31
2.31
7/25/10
4.53
4.53
3.4 ng/L - Annual Average for 2010
2/16/11
< 1
0.5
5/31/11
5.78
5.78
8/30/11
5.28
5.28
11/22/11
2.94
2.94
3.6 ng/L - Annual Average for 2011
2/15/12
1.96
1.96
5/23/12
4.56
4.56
8/29/12
11
11
12/13/12
2.16
2.16
4.9 ng/L - Annual Average for 2012
3/6/13
1.17
1.17
5/28/13
2.18
2.18
9/23/13
1.37
1.37
1.6 ng/L - Annual Average for 2013
3/13/14
3.59
3.59
7/16/14
2.22
2.22
9/16/14
< 1
0.5
12/9/14
3.69
3.69
2.5 ng/L - Annual Average for 2014

IWC Calculations
Facility:
NCOOxxxxx
Prepared By:,
Enter Design Flow (MGD): 1.2
Enter s7Q10 (cfs): 0.35
Enter w7Q10 (cfs): 2.42
Total Residual Chlorine (TRC)
Daily Maximum Limit (ug/1)
Ammonia (Summer)
Monthly Average Limit (mg NH3-N/1)
s7Q10 (CFS) 1 1
0.35
s7Q10 (CFS)
0.35
DESIGN FLOW (MGD)
1.2
DESIGN FLOW (MGD)
1.2
DESIGN FLOW (CFS)
1.86
DESIGN FLOW (CFS)
1.86
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
Upstream Bkgd (ug/1)
0
Upstream Bkgd (mg/1)
0.22
IWC (%)
84.16
IWC (%)
84.16
Allowable Cone. (ug/1)
20
Allowable Cone. (mg/1)
1.1
Ammonia (Winter)
Monthly Average Limit (mg NH3-N/1)
Fecal Coliform
w7Q10 (CFS)
2.42
Monthly Average Limit:
200/100mi
DESIGN FLOW (MGD)
1.2
(If DF >331; Monitor)
DESIGN FLOW (CFS)
1.86
(If DF<331; Limit)
STREAM STD (MG/L)
1.8
Dilution Factor (DF)
1.19
Upstream Bkgd (mg/1)
0.22
IWC (%)
43.46
Allowable Cone. (mg/1)
3.9
Total Residual Chlorine
1. Cap Daily Max limit at 28 ug/I to protect for acute toxicity
Ammonia (as NH3-N)
1. If Allowable Conc > 35 mg/l, Monitor Only
2: Monthly Avg limit x 3 = Weekly Avg limit (Municipals); capped at 35 mg/I
3. Monthly Avg limit x 5 = Daily Max limit (Non-Munis); capped at 35 mg/I
4. BAT for Minor Domestics: 2 mg/I (summer) and 4 mg/I (winter)
5. BAT for Major Municipals: 1 mg/I (year-round)
Fecal Coliform.
1. Monthly Avg limit x 2 = 4001100 ml = Weekly Avg limit (Municipals) = Daily Max limit (Non -Muni)
NPDES Server/Current Versions/WLA; TB 1/16/2009

Whole Effluent Toxicity Testing and Self Monitoring Summary
Trinity American Corporation
NCO086029/001
County: Randolph
Region: WSRO
Basin:
YAD09
Jan Apr Jul Oct
SOC_JOC:
Ceri7dPF Begin:
3/1/2014
chrlim: 90%
NonComp: Single
70,10:
0
PF: 0.072 IWC:
100 Freq: Q
J
F
M
A
M
J I
A
S
O
N
D
2010 Pass
*
*
Pass
*
* Pass
*
*
Pass
2011 Pass
*
*
Pass
*
* Pass
*
*
Pass
2012 Pass
*
*
Pass
*
* Pass
*
*
Pass
2013 Pass
*
*
Pass
*
* NR
Pass
*
Pass
2014 H
Pass
*
Pass
*
* Pass
*
*
Pass
Troy WWTP
NCO028916/001
County: Montgomery
Region: FRO
Basin:
YAD15
Jan Apr Jul Oct
SOC_JOC:
Ceri7dPF Begin:
8/1/2004
Chr lim 84%
NonComp: Single
7Q30:
0.35
PF: 1.2
IWC:
84 Freq: Q
J
F
M
A
M
J J
A
S
0
N
D
2010 Pass
*
*
Pass
*
* Pass
*
*
Pass
2011 Pass
*
*
Pass
*
* Pass
*
*
Pass
2012 Pass
*
*
Pass
*
* Pass
*
*
Pass
2013 Pass
*
*
Pass
*
* Pass
*
*
Pass
2014 Pass
*
*
Pass
*
* Pass
*
*
Pass
Tryon WWTP
NCO021601/001
County: Polk
Region: ARO
Basin:
BRD06
Mar Jun Sep Dec
SOC_JOC:
Ceri7dPF Begin:
2/1/2009
chr lim: 37%
NonComp: Single
7Q10:
4.00
PF: 1.5
IWC:
37.0 Freq: Q
J
F
M
A
M
J J
A
S
0
N
D
2010 *
*
Pass
*
*
Pass *
*
Pass
*
*
Pass
2011 *
*
Pass
*
*
Pass *
*
Pass
*
*
Pass
2012 *
*
Pass
*
*
Pass *
*
Pass
*
*
Pass
2013 *
*
Pass
*
*
Pass *
*
Pass
*
*
Pass
2014 *
*
Pass
*
*
Pass *
*
Pass
*
*
Pass
Tuckasegee WSA WWTP
NCO039578/001
County: Jackson
Region: ARO
Basin:
LTN02
Feb May Aug Nov
SOC_JOC:
Ceri7dPF Begin:
5/1/2008
CH LIM: 1.5%@ 1.5
NonComp: Single
7Q10:
149.6
PF: 1.5
IWC:
1.5 Freq: Q
J
F
M
A
M
J J
A
S
0
N
D
2010 *
Pass
*
*
Pass
* *
Pass
*
*
Pass
2011 *
Pass
*
*
Pass
* *
Pass
*
*
Pass
2012 *
Pass
>7(P)
*
Pass
* *
Pass
*
*
Pass
2013 *
Pass
*
*
Pass
* *
Pass
*
*
Pass
2014 *
Pass
*
*
Pass
* *
Pass
*
*
Pass
Tuckertown WTP
NCO075701/001
County: Stanly
Region: MRO
Basin:
YAD08
Jan Apr Jul Oct
SOC_JOC:
Ceri7dPF Begin:
4/1/2009
Chr Monit: 90
NonComp:
7Q10:
PF: 0.009 IWC:
Freq: Q
J
F
M
A
M
J I
A
S
0
N
D
2010 Pass
*
*
Pass
*
* Pass
*
*
Pass
2011 Fail
*
*
Pass
*
* Pass
*
*
Pass
2012 Pass
*
*
Fail
*
* Pass
*
*
Pass
2013 Fail
*
*
Pass
*
* Pass
*
*
Pass
2014 Pass
*
*
Fail
Fail
Pass Pass
*
*
Pass
Page 114 of 127

Song, Yang
From: joseph shields <[e-mail]>
Sent: Monday, April 06, 2015 2:40 PM
To: Song, Yang
Subject: Re: Troy WWTP 2A Form modification confirmation
Very good that is correct the avg flow is 490 and I&I is < 10%
J Shields
Director Troy POTW
On Tuesday, March 17, 2015 12:23 PM, "Song, Yang" <yang.songC-ncdenr.gov> wrote:
Hello Mr. Shields,
I am writing to ask for your email confirmation on two modification in 2A Form:
1. A.9.e section, change the "average daily flow rate" to 0.490 mgd;
2. B.1 section, change the "inflow and infiltration" amount to < 10% of inflow;
Please write me back a confirmation email and I will attach that with the modified 2A Form.
Thank you!
Yang Song
Engineer, NPDES Complex Permitting Unit
NCDWR/Water Quality Programs
919-807-6479
E-mail correspondence to and from this address may be subject to the
North Carolina Public Records Law and may be disclosed to third parties

A4jp
NCDENR
North Carolina Department of Environment and Natural Resources
Pat McCrory John E. Skvarla, III
Governor Secretary
October 29, 2014
Tim Fitzgerald
Chairman
Yadkin Pee Dee River Basin Association
tim fitzgerald(d)highpointnc.aov
RE: Amendment #3 to the Yadkin Pee Dee River Basin Association Memorandum of Agreement
Dear Mr. Fitzgerald:
Attached please find executed Amendment #3 to the Yadkin Pee Dee River Basin Association
(YPDRBA) Memorandum of Agreement (MOA). With this Amendment, the Division has approved
the addition of the Town of Troy WWTP (NC0028916) as a member of the YPDRBA, effective
October 28, 2014.
If you have any questions or comments, please feel free to contact Carrie Ruhlman at [phone] or
came nihlman(a)ncdenr.gov.
Sincerely,
6M
Dianne Reid, Chief
Water Sciences Section
Division of Water Resources, NCDENR
cc: Roger Spach (raspachLlexingt�onnc.cov)
David Saunders (david saunders(a7hdrinc.com)
Joseph Shields (troywwtp650(a)�ahoo.coml
1621 Mail Service Center, Raleigh, North Carolina 27699-1621
Location: 4401 Reedy Creek Road, Raleigh, North Carolina 27607
Phone: [phone] \ FAX: [phone]
Internet: portal.ncdenr.org/web/wgthome
An Equal Opportunity \ Affirmative Action Employer

YPDRBA Amendment #3
AMENDMENT TO THE MEMORANDUM OF AGREEMENT
BETWEEN THE NORTH CAROLINA DIVISION OF WATER RESOURCES
AND THE YADKIN/PEE DEE RIVER BASIN ASSOCIATION
WHEREAS, the NORTH CAROLINA DIVISION OF WATER RESOURCES (DWR) and the YADKIN/PEE
DEE RIVER BASIN ASSOCIATION (YPDRBA) have entered into a MEMORANDUM OF AGREEMENT
(MOA) dated August 1, 2013; and
WHEREAS, said MOA provided for the modification by written consent of the DWR and the YPDRBA; and
NOW THEREFORE, the MOA is hereby amended as follows:
By execution of this Amendment, the TOWN OF TROY (NC0028916) is hereby added to the MOA.
By his signature, Benny R. Dennis Jr., Director of Public Works, represents that he has authority to
enter this MOA on behalf of the Town of Troy.
By: 'z
Benny ennis Jr., DirelolVof Public Works
Town o roy
Date: /0 / Y — /7
IN WITNESS WHEREOF, the parties have executed this instrument by authority duly given, to be effective as
of the date executed by the DWR.
YADKIN/PEE DEE RIVER BASIN ASSOCIATION
By:�
Tim FitzgerAY, Chairman
Yadkin/Pee Dee River Basin Association
Date: 1-4_ r90 - H
ECF� . v
i
OCT 242014
NC DIVISION OF WATER RESOURCES
Thomas A , eeder, Director
NC Divisi n of Water Resources
Date: % —")- 0�' - / 4/
Water Sciences "' October 14, 2014
-� .�

Grzyb, Julie
From: Grzyb, Julie
Sent: Friday, September 12, 2014 10:34 AM
To: Ruhlman, Carrie
Cc: Kroeger, Steve; Brantley, Mark; Patt, Heather; Henson, Belinda; Mcnutt, Cam; Belnick,
Tom
Subject: RE: Town of Troy - Request to Join YPDRBA
Carrie,
I reviewed the effluent, upstream and downstream data from the Town of Troy.
In July 2014 there were no DO violations at the plant or upstream, however, downstream data showed 7 samples below
4 mg/L.
In June 2014 there were no DO violations at the plant or upstream, however, downstream data showed 3 samples below
4 mg/L.
In the summer of 2013 there were no DO violations at the plant or upstream or downstream.
In August 2012 there were no DO violations at the plant, however, upstream there were 9 violations and downstream
data showed 7 samples below 4 mg/L.
In July 2012 there were no DO violations at the plant, however, upstream there were 5 violations and downstream data
showed 9 samples below 4 mg/L.
In June 2012 there were no DO violations at the plant, however, upstream there were 2 violations and downstream data
showed 5 samples below 4 mg/L.
In August 2011 there were no DO violations at the plant, however, upstream there were 6 violations and downstream
data showed 8 samples below 4 mg/L.
In July 2011 there were no DO violations at the plant, however, upstream there were 9 violations and downstream data
showed 12 samples (all samples collected) below 4 mg/L.
In June 2011 there were no DO violations at the plant, however, upstream there were 1 violations and downstream data
showed 7 samples below 4 mg/L.
Given the data, it is difficult for me to conclude that the DO problem is from the WWTP or a naturally occurring problem
upstream or as you recognized a problem being caused by the reservoir upstream.
I agree that as long as the Town of Troy has no plans to expand removal of the downstream station is okay, especially
since no one is really looking at this data. However, I think DWR might want to consider placing an ambient monitoring
station in this segment of the stream (possible upstream of the WWTP) because the data does show possible DO
impairment.
The Town of Troy should be warned that any request for a plant expansion in the future would likely require modelling
to assess what is really happening upstream and what impact the WWTP is actually having on the stream.
Julie
From: Henson, Belinda
Sent: Thursday, September 04, 2014 2:56 PM
To: Ruhlman, Carrie
Cc: Kroeger, Steve; Brantley, Mark; Patt, Heather; Grzyb, Julie
Subject: RE: Town of Troy - Request to Join YPDRBA

N
Carrie,
I do not see a problem with accepting the Town's request to join the YPDRBA for membership without adding a
monitoring station upstream and downstream of their discharge. They do have a good compliance record. At this time,
they do not have any plans to expand their WWTP. If you need further info please let me know. Thank you.
Belinda
From: Ruhlman, Carrie
Sent: Thursday, September 04, 2014 2:32 PM
To: Grzyb, Julie; Patt, Heather; Henson, Belinda
Cc: Kroeger, Steve
Subject: Town of Troy - Request to Join YPDRBA
Hi All,
The Town of Troy (NC0028916) has submitted a preliminary request to the YPDRBA for membership. The Troy WWTP is
permitted at 1.2 MGD, but currently operates somewhere around 0.72 (Jan—June'14 avg.). The facility discharges into
Densons Creek, a trib to the Little River, in the Uwharrie National Forest.
In terms of instream monitoring, the facility is required by their permit, to monitor Temp, DO and Conductivity 3x/week
upstream and downstream of their discharge. According to the Public Works Director/ORC/Pretreatment coordinator
(Troy is a small town), they pretty much monitor immediately upstream and downstream of the outfall.
There should be a permit renewal application up in NPDES for this facility. I don't believe that they requested any
changes to their permit at this time and they have no plans to expand in the near future.
The AMS program monitors the Little River about 3.5 miles upstream of where Densons Ck comes in. The YPDRBA
monitors the Little River at the last road crossing before the confluence with the Pee Dee. From what I can tell, there
isn't much in between the two monitoring stations other than forest.
Based on my research, it appears as though Troy has a pretty clean compliance record (Belinda, please correct me if I'm
wrong). My inclination is to allow them to join the Association, waive their instream monitoring requirements and not
add any additional monitoring stations to the YPDRBA network at this time. If this causes heartburn, the other option
would be to move YPDRBA station Q9340000 (Toms Br dns Ellerbe WWTP) to the Little River somewhere between the
current AMS station and YPDRBA station... I'm not sure how much useful information this station would provide other
than being an additional site though. FYI, Ellerbe discontinued their membership with the Association last August b/c
they were connecting to Rockingham so this site no longer serves its original purpose.
If anyone has any thoughts on this, comments, questions, etc., please let me know by next Friday, the 12`h. If I don't
hear anything, I'll assume that you're OK with Troy joining the Association without adding a monitoring station ups/dns
of their discharge.
Thanks for your help!
Carrie Ruhlman
Monitoring Coalition Coordinator
NC Division of Water Resources
1621 Mail Service Center
Raleigh, NC 27699-1621
Phone: [phone]
carrie. ruhlman(amcderin gov

Additional information Troy permit application
* The average daily I & I is < 10% however during periods heavy rain I & I can be > 1.000 mgd.
**There are multiple entries for As, Cr, Pb, Ni, during the reporting period two methods were used SM 200.7 and SM 200.8.
**" Hg was reported using EPA 1641 and EPA 245.1.
NPDES FORM 2A Additional Information

INFLUENT INF
SPLITTER 1 2 MGD GRIT REMOVAL
BOX 388 1.5 MGD BAR SCREEN
E r-1. ,. 1.5 MGD
INFLUENT .388
NOT USED
.776
.6 MGD 6 MGD
400 KW CATAPILLAR GENERATORLD
PROVIDES COMPLETE BACK-UP o 0 0 0
FOR ALL PLANT OPERATIONS. I CDI I
CD
NOT USED
776 DITCHES RUN IN SERIES
EFFLUENT
SPLITTER 194
BOX 1.194
1.20 MGD 194 194
ULTRA -VIOLET LIGHT
YIF CLARIFIER
.6TURN SLUDGE
0 0
J J
Vl N
.388 w w
N Vl
Q Q
3 3
.040
EFFLUENT DISCHARGE
PT tt001 AER119
DIGESTER
TO DENSONS
Samp I i n Poi nts CREEK
g W.S. PS 300 GPM
1O Influent
(prior to any side stream)
0 Effluent (after UV disinfection)
Q Oxidation Ditch
Q Sludge to Disposal
w
a
388
RETURN
1 SLUDGE
PS
1.2 MGD
C)
a
z
.388
AEROBIC DIGESTION/
SLUDGE
HOLDING
TANK
1.2 MG
y
TO LAND APPLICATION
TOWN OF TROY
ACTIVATED SLUDGE/AEROBIC DIGESTION WWTP
PERMIT NO: NCO028916
Figure 1. Facility Diagram
\Facilities Diagram.dgn 12/14/2008 12:46:14 P

eQ0
NPDES/A uifer Protection Permitting Unit Pretreatment Information Request Form
PERMIT WRITER COMPLETES THIS PART:
Check all that
PERMIT WRITERS - AFTER you get this form back
apply
from PERCS:
Notify PERCS if LTMP/STMP data we said should be
on DMRs is not really there, so we can get it for you
(or NOV POTW).
- Notify PERCS if you want us to keep a specific POC
in LTMP/STMP so you will have data for next permit
renewal.
Email PERCS draft permit, fact sheet, RPA.
Send PERCS paper copy of permit (w/o NPDES
boilerplate), cover letter, final fact sheet. Email RPA if
changes.
Date of Request
2/25/2015
municipal renewal
d
Requestor
Yang Song
new industries
Facility Name
Town of Troy
WWTP expansion
Permit Number
NCO028916
Speculative limits
Region
Fayetteville
stream reclass.
Basin
Yadkin
outfall relocation
7Q10 change
otherl
other
check applicable PERCS staff:
Other Comments to PERCS:
One non -categorical SIU as shown in permittee application form
BIRD, CPF, CTB, FRB, TAR - Sarah Morrison 807-6310
q
CHO, HIW, LUM, LTN, NES, NEW, ROA, YAD - Monti
Hassan 807-6314
PERCS PRETREATMENT STAFF COMPLETES THIS PART:
Status of Pretreatment Program (check all that apply)
1) facility has no SIU's, does have Division approved Pretreatment Program that is INACTIVE
facility has no SIU's, does not have Division approved Pretreatment Program
3) facility has SIUs and DWQ approved Pretreatment Program (list "DEW if program still under development)
3a) Full Program with LTMP
3b) Modified Program with STMP
4) additional conditions regarding Pretreatment attached or listed below
Flow, MGD
Permitted
Actual
Time period for Actual
STMP time frame:
Industrial
20
Most recent:
C1
Uncontrollable
n/a
Next Cycle:
2=0 I
a
a
o
M
Parameter of
Concern (POC)
Check List
POC due to
NPDES/ Non-
Disch Permit
Limit
Required by
EPA*
Required
by 503
Sludge—
POC due
to SIU***
POTW POC
(Explain
below)****
STMP
Effluent
Freq
LTMP
Effluent
Freq
�..`
Q = Quarterlyl/
M = Monthly
V
BOD
i/
4
Q M
TSS
4
Q M
NH3
4
Q M
Arsenic
y
4
Q M
q
Cadmium
1l
✓
4
Q M
q
Chromium
4
Q M
4
Copper
4
Q M
Cyanide
4
Q M
Is all data on DMRs?
4
Lead
1f-
4
Q M
YES
Mercury
-
4
Q M
NO (attach data)
Molybdenum
✓
4
Q M
4
Nickel
4
Q M
Silver
4
Q M
Selenium
4
Q M
l
Zinc
4
Q M
Is data in spreadsheet?
Total Nitrogen
4
Q M
YES (email to writer)
Phosphorus
4
Q M
NO
4 Q M
4 Q M
4 Q M
4 Q M
*Always in the LTMP/STMP ** Only in LTMP/STMP if sludge land app or composte (dif POCs for incinerators)
*** Only in LTMP/STMP while SIU still discharges to POTW **** Only in LTMP/STMP when pollutant is still of concern to POTW
Comments to Permit Writer (ex., explanation of any POCs: info you have on IU related investigations into NPDES problems):
NPDES Pretreatment request form.xlsx
Revised: July 24, 2007