NC0028916_Permit Issuance_20001215

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
December 15, 2000
Mr. E. Gray Walls, P.E.
Public Services Director
Town of Troy
444 North Main Street
Troy, North Carolina 27371
Ax.;W�
NCDENR
Subject: NPDES Permit Issuance
Troy WWTP
Permit No. NCO028916
Montgomery County
Dear Mr. Walls:
In accordance with the application for discharge permit, the Division is forwarding herewith the
subject NPDES 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.
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,
Mail Service Center 6714, Raleigh, North Carolina 27699-6714. Unless such a demand is made, this permit
shall be final and binding.
Please take notice that this permit is not transferable except after notice to the Division of Water
Quality. The Division of Water Quality may require modification or revocation and reissuance of the permit.
This permit does not affect the legal requirements to obtain other permits which may be required by the
Division of Water Quality, the Division of Land Resources, the Coastal Area Management Act, or any other federal
or local governmental permit.
If you have any questions regarding the draft NPDES permit, please contact Susan Wilson at (919)
733 - 5083, extension 510.
Sincerely,
ORIGINAL SIGNED Dy
Kerr T. S"AEOC
cc: Fayetteville Regional Office/Water Quality Section
Central Files
Point Source Compliance and Enforcement Unit
NPDES Unit
Aquatic Toxicology Unit
EPA Region IV, Roosevelt Childress
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-161 7 - TELEPHONE [phone]/FAX [phone]
AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/ 10% POST -CONSUMER PAPER
VISIT US ON THE WEB AT htto://h2o.enr.state.nc.us/NPDES

Permit No. NCO028916
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PF,RMTT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
Incompliance with the provisions of North Carolina General Statute 143-215;1, other lawful standards
and regulations promulgated and adopted by the North Carolina Water Quality Commission, and the
Federal Water Pollution Control Act, as amended,
Town of Troy
is hereby authorized to discharge wastewater from a facility located at
Troy Wastewater Treatment Plant
Off NCSR 1324
Troy
Montgomery County
to receiving waters designated as Denson's Creek in the Yadkin - Pee Dee River Basin
in accordance with the discharge limitations, monitoring requirements, and other conditions set forth in
Parts I, II, III, and IV hereof.
This permit shall become effective January 1, 2001.
This permit and the authorization to discharge shall expire at midnight on June 30, 2004.
Signed this day December 15, 2000.
r 'tR 11 ! SI ' 'Jt_i� E Y
1000 PF E I
Kerr T. Stevens, Director
Division of Water Quality
By the Authority of the Environmental Management Commission

SUPPLEMENT TO PERMIT COVER SHEET
Town of Troy
Troy WWTP
is hereby authorized to:
Continue to operate a 0.84 MGD wastewater treatment facility consisting of flow
equalization (from previously permitted lagoon system), mechanical bar screen, grit
removal, dual oxidation ditches, dual secondary clarification, sludge digestion and
holding, disinfection via UV disinfection or chlorination/dechlorination (back-up)
located at the Troy Wastewater Treatment Plant, 650 Glen Road, Troy, Montgomery
County, and
2. Discharge wastewater from said treatment works at the location specified on the
attached map into Densons Creek which is classified C waters in the Yadkin - Pee Dee
River Basin.
3. After submittal of the Engineering Certification for the construction or upgrade of the
disinfection system, operate a 1.2 MGD design flow wastewater treatment facility,
with limits as specified in Part I.A.(2). and continue to discharge effluent at the
location sited in (2).
Town of Troy
NPDES No. NCO028916

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Latitude: 35'22' 25" 5ub-DA-Fa : 4-
03-o-7-lS
Longitude 79° 51' 33"
0 ,_mad # F19NW, Star
51WAM-Ciao-5' C 51: 13-25-20(9)
Receiving, tream: Denson's Creek, Yadkin - Pee Dee River Basin
Permitted Flow: 0.84 MGD; expansion phase to 1.2 MGD
"'All
Facility x,'
f '
� M-
,-'
Location .
Town of Troy
% =,za NC0028916

A. (I.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
During the period beginning on the effective date of the permit and lasting until expansion above
0.84 MGD, the Permittee is authorized to discharge from outfall 001. Such discharges shall be
limited and monitored by the Permittee as specified below:
Effluent Characteristics
Limits
Monitoring Requirements
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Locationi
Flow
0.84 MGD
Continuous
Recording
Influent or
Effluent
BOD, 5 day (202C)2
[April 1 -October 31 ]
13 mg/I
19.5 mg/I
3Meek
Composite
Influent &
Effluent
BOD, 5 day (202C)2
[November 1- March 31]
26 mg/I
39 mg/I
3Meek
Composite
Influent &
Effluent
Total Suspended Residue2
30 mg/I
45 mg/I
3Meek
Composite
Influent &
Effluent
NH3 as N [April 1- October 31
2.0 m /I
3Meek
Composite
Effluent
NH3 as N [November 1 - March 31]
4.0 m /I
3Meek
Composite
Effluent
Dissolved Oxygen3
3Meek
Grab
Effluent
Dissolved Oxygen
3Meek
Grab
Upstream &
Downstream
Fecal Coliform (geometric mean)
200/100 ml
400/100 ml
3Meek
Grab
Effluent
Fecal Coliform (geometric mean)
3Meek
Grab
Upstream &
Downstream
Total Residual Chlorine4
3Meek
Grab
Effluent
Total Nitrogen (NO2+NO3+TKN)
Quarterly
Composite
Effluent
Total Phosphorus
Quarterly
Composite
Effluent
Temperature (°C)
Daily
Grab
Effluent
Temperature (°C)
3Meek
Grab
Upstream &
Downstream
Conductivity
3Meek
Grab
Effluent
Conductivity
3Meek
Grab
Upstream &
Downstream
Chronic Toxicity5
Quarterly
Composite
Effluent
Arsenic
2/Month
Composite
Effluent
Cadmium
Monthly
Composite
Effluent
Chlorides
2/Month
Composite
Effluent
Copper
2/Month
Composite
Effluent
C anide6
6.3 pg/I
22 pg/I
Weekly
Grab
Effluent
Zinc
2/Month
Composite
Effluent
H7
6-9
3Meek
Grab
Effluent
(]Footnotes on next page)
Town of Troy
NPDES No. NC0028916

A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
(Continued)
Footnotes:
1. Sample locations: U - Upstream at least 100 feet, D - Downstream approximately 0.4 miles
before the confluence with Spencer Branch. Stream samples shall be grab samples and shall
be collected 3/Week during June - September and 1 /Week during the remaining months of
the year.
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not
exceed 15% of the respective influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
4. Monitoring for total residual chlorine is required only if chlorine is used as a back-up
disinfection method or elsewhere in the process.
5. Chronic Toxicity (Ceriodaphnia dubia) P/F at 79%: January, April, July, and October [see Part
I, A(3.)]. Toxicity monitoring shall coincide with metals and cyanide monitoring.
6. The quantitation limit for cyanide shall be 10 ug/l (10 ppb). Levels reported at less than 10
ug/l shall be considered zero for compliance purposes.
7. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace
amounts.
Town of Troy
NPDES No. NCO028916

A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS — FINAL
During the period beginning upon expansion above 0.84 MGD (not to exceed 1.2 MGD) 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
Limits
Monitoring Requirements
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample Type
Sample
Locationl
Flow
1.2 MGD
Continuous
Recording
Influent or
Effluent
BOD, 5 day (202C)2
[April 1 —October 31 ]
7 mg/I
10.5 mg/I
3/Week
Composite
Influent &
Effluent
BOD, 5 day (20°C)2
[November 1 — March 31]
14 mg/I
21 mg/I
3/Week
Composite
Influent &
Effluent
Total Suspended Residue2
30 mg/I
45 mg/1
3/Week
Composite
Influent &
Effluent
NH3 as N [April 1— October 31]
2.0 m /I
3/Week
Composite
Effluent
NH3 as N [November 1— March 31]
4.0 mg/1
3/Week
Composite
Effluent
Dissolved Oxy en3
3/Week
Grab
Effluent
Dissolved Oxygen
3/Week
Grab
Upstream &
Downstream
Fecal Coliform (geometric mean)
2001100 ml
400/100 ml
3/Week
Grab
Effluent
Fecal Coliform (geometric mean)
3/Week
Grab
Upstream &
Downstream
Total Residual Chlorine4
3/Week
Grab
Effluent
Total Nitrogen (NO2+NO3+TKN
Monthly
Composite
Effluent
Total Phosphorus
Monthly
Composite
Effluent
Temperature (°C)
Daily
Grab
Effluent
Temperature (°C)
3/Week
Grab
Upstream &
Downstream
Conductivity
3/Week
Grab
Effluent
Conductivity
3Meek
Grab
Upstream &
Downstream
Chronic Tokicity5
Quarterly
Composite
Effluent
Arsenic
2/Month
Composite
Effluent
Cadmium'
Monthly
Com osite
Effluent
Chlorides
2/Month
Composite
Effluent
Copper
2/Month
Composite
Effluent
C anide6
6.3 pg/1
22 pg/I
Weekly
Grab
Effluent
Zinc
2/Month
Composite
Effluent
H7
6-9
3/Week
Grab
Effluent
(Footnotes on next page)
Town of Troy
NPDES No. NC0028916

A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
(Continued)
Fnntn nteG
1. Sample locations: U - Upstream at least 100 feet, D - Downstream approximately 0.4 miles
before the confluence with Spencer Branch. Stream samples shall be grab samples and shall
be collected 3/Week during June - September and 1 /Week during the remaining months of
the year.
2. The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not
exceed 15% of the respective influent value (85% removal).
3. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
4. Monitoring for total residual chlorine is required only if chlorine is used as a back-up
disinfection method or elsewhere in the process.
5. Chronic Toxicity (Ceriodaphnia dubia) P/F at 84%: January, April, July, and October [see Part
I, A(4.)]. Toxicity monitoring shall coincide with metals and cyanide monitoring.
6. The quantitation limit for cyanide shall be 10 ug/l (10 ppb). Levels reported at less than 10
ug/1 shall be considered zero for compliance purposes.
7. The pH shall -not be less than 6.0 standard units nor greater than 9.0 standard units.
There shall be no discharge of floating solids or visible foam in other than trace
amounts.
Town of Troy
NPDES No. NCO028916

A (3). CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (gRTRLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 79 %.
The permit holder shall perform at a minimum, quarterlu 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 January, April, July, and October. Effluent sampling for this
testing shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
If the test procedure performed as the first test of any single quarter results in a failure or
ChV below the permit limit, then multiple -concentration testing shall be performed at a
minimum, in each of the two following months as described in "North Carolina Phase II
Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of
the highest concentration having no detectable impairment of reproduction or survival and the
lowest concentration that does have a detectable impairment of reproduction or survival. The
definition of "detectable impairment," collection methods, exposure regimes, and further statistical
methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the
parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally,
DWQ Form AT-3 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Quality
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 Flow" 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.
Town of Troy
NPDES No. NCO028916

A (4). CHRONIC TOXICITY PASS/FAIL PERNUT LINHT (QRTRLY)
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, quarterlu 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 January, April, July, and October. Effluent sampling for this
testing shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
If the test procedure performed as the first test of any single quarter results in a failure or
ChV below the permit limit, then multiple -concentration testing shall be performed at a
minimum, in each of the two following months as described in "North Carolina Phase II
Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of
the highest concentration having no detectable impairment of reproduction or survival and the
lowest concentration that does have a detectable impairment of reproduction or survival. The
definition of "detectable impairment," collection methods, exposure regimes, and further statistical
methods are specified in the "North Carolina Phase II Chronic Whole Effluent Toxicity Test
Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the
parameter code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally,
DWQ Form AT-3 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Quality
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 Flow" 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.
Town of Troy
NPDES No. NCO028916

PUBLIC NOTICE
STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT
COMMISSION/NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE A
NPDES WASTEWATER PERMIT
On the basis of thorough staff review and
application of NC General Statute 143.21. Public
law 92.500 and other lawful standards and reg-
ulations, the North Carolina Environmental Man.
agement Commission proposes to issue a Na-
tional Pollutant Discharge Elimination System
(NPDES) wastewater discharge permit to the
Person(s) listed on the attached pages 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 re-
ceived prior to that date are considered in the
final determinations regarding the proposed per.
mit. The Director of the NC Division of Water
Quality may decide to hold a public meeting for
the proposed permit should the Division receive
a significant degree of public interest.
Copies of the draft permit and other support.
ing information on file used to determine condi-
tions present in the draft permit are available
upon request and payment of the costs of repro-
duction. Mail comments and/or requests for in-
formation to the NC Division of Water Quality at
the above address or call Ms. Christie Jackson at
[phone]. extension 538. Please include
the NPDES permit number (attached) in any
communication. Interested persons may also
visit the Division of Water Quality at 512 N.
Salisbury Street, Raleigh, NC 27604-1148 be-
tween the hours of 8:00 a.m. and 5:00 p.m. to
review information on file.
NPDES Permit Number NC0028916. Town
of Troy, 444 North Main Street, Troy, NC 27371
has applied for a permit renewal of 0.84 MGD
and expansion to 1.2 MGD fora facility located in
Montgomery County discharging treated waste.
water into Denson's Creek in the Yadkin - Pee
Dee River Basin. Currently BOD5, ammonia,
dissolved oxygen and cyanide are water quality
limited. This discharge may affect future alloca.
tions in this portion of the receiving stream.
Sep 27, 1 tc
Certificate ofPublication
Moutgoiiiery Cowity, North Carolina:
Tammy McQueen Dunn, Editor of the Montgomery 1-1crald, a newspaper in
Montgomery County, State of North Carolina, being duly sworn, deposes and
says that the annexed Advertisement ( r Notice in the action entitled
Intent to Issue A NPDES Wastewater Permit
Notification of Intent
was duly published in the Montgomer,.' Herald once a week for ( weeks
beginning on Sept 27 2000 , , and ending
on
Charles A. Womack, Jr.
Publisher
1
Editor, acting agent for publisher
The Montgomery Herald
Sworn to before me this the
2 8 t h
day of S e p t 2000
Notary Public
M'y commission expires January 21, 2005.

Comments: Town of Troy WWTP NPDES Renewal and Expansion to 1.2 MGD
-This office concurs that the expansion to 1.2 should be granted based on the revised USGS
stream data.
-It is requested that the third paragraph of the CHRONIC TOXICITYPASS/FAIL PERMIT o�G
LIMIT (QRTRLY) page be in BOLD type to avoid compliance problems with the new —
toxicity compliance protocols
-Concur with proposed limits for 0.84mgd and 1.2mgd.
- It is understood that limitations for 1.2mgd will begin the following month after the
Division has received the engineer's certification for the upgraded disinfection ©�
system.
Noted is the monitoring requirement for "Chlorides". It is suggested (if not already
included in P&E's SOP) that all POTW's that have a significant industrial dA1JC__ 6?1r51T_(0t4
contribution of chlorides have such monitoring. It is also suggested that ESB k i- . -Or�
provide the Permitting Unit the effluent concentration that chlorides
toxicity could be projected and this information shared with the DWQ Pretreatment
Unit to establish Industrial User Permit limitations to prevent NPDES limits
violations.
-Be advised that the influent equalization basin noted in the "Supplement To Permit Cover
Sheet" as well as the current chlorination basin were flooded during recent
hurricanes. It is the understanding of this office that the proposed modification of
disinfection equipment will be constructed well above the I-00 3 flood level. Since the
noted hurricanes were above the 24hr25yr storm event this is not believed to be an issue
with the influent EQ basin.
C+1"-4O> CAw2106S 70 ZIN o N lk0/� I T02lN f (� sr �. L 5' b�G4'Lrvrh � �
D
J U L 10 2000
POIN - 6U C— r�=Yi; H
POINT SOUR..- �_.---

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
RENEWAL FOR 0.84 MGD AND EXPANSION TO 1.2 MGD
NPDES No. NC0028916, Troy WWTP
A ` hear t/Fac h .:1Vame _;; Troy WWTP
A` ' licant Address . 444 North Main Street, Troy, NC 27371
Farihty Address `: 650 Glen Road, Troy, NC
Permitted Flow , . 0.84 MGD, Expansion to 1.2 MGD
e of;Waste 75% Domestic/ - 25% Industrial (est. from application)
-Facility/'ermit.Status :°- Renewal & Expansion
Receivir' Stream , ; . , Denson's Creek Re -ional Office FRO
Streamr;Classification C USGS Topo Quad F19NW
. SI: 13-25-20(9)... Star
3Q3(d) Listed?s NO . Permit Writer , 5.- S. Wilson
Szbbasn, 03-07-15 Date: June 19, 2000
Dramae Area; (mi2)l,32
Summer 7.Q 10: (cfs) 0.35-40
Winter '7Q 10 (ifs) 2.42 ���
-1441
Avera e.Flow (cfs) 32
79% at 0.84
MGD)._
84% (at 1.2 MGD)
Perna . =,SIC Code NA
SUMMARY
The Town of Troy plant is currently permitted for 0.84 MGD flow. Limits for 1.2 MGD were
presented to the Town via speculative letter July 23, 1999. The situation with the Town of Troy
is unusual in that essentially all components necessary to meet the design flow of 1.2 MGD are
already in place. The upgraded disinfection unit (LTV disinfection was proposed with the
chlorine disinfection to be retained as backup?) is the only treatment unit that needs to be
upgraded" to accommodate the 1.2 MGD flow. After further consideration and review of the
updated SEPA rules [15A 01C .0504 (3)], the Division agreed that a SEPA report was not
necessary for this increase in flow (under the 0.5 MGD expansion criteria - the 1 /3 1WC does
not apply to existing/expanding facilities). This WLA represents both the renewal at the
existing flow and the expansion to 1.2 MGD.
Upon the Town's request, USGS provided updated streamflow information for Denson's Creek.
The new low flow (7Q1Os) streamflow information was estimated as 0.35 cfs (the previous being.
0.1 cfs). The expansion phase to 1.2 MGD reflects limits based on 0.35 cfs: Additionally, the
updated toxicant information for the existing permitted flow of 0.84 MGD is based on the new
7Q 1 Os flow.
The are no active ambient monitoring stations on Denson's Creek and there is no special
management strategy for this creek.
TOXICANT PARAMETERS
A reasonable potential analysis (RPA) was conducted for all toxicants currently monitored [Cd,
Cr, CN, Pb, Ni, Cu, Hg, Ag, Zn, Se, Mo, chlorides]. 'Troy has an active pretreatment program
and is required to monitor specific metals on a quarterly basis. The table below represents the
outcome of the RPA for Troy.
Trot, wwrP
F )ES Permit lZcnewal/ lodificatiori

Reasonable
Potential?
Limit?'.
Itemmewal
at 0.84 "•.
MGD
Limit?.
Expansion';t®
1.2:1VTGD `
Acute .
Chronic
Acute
°, Chi-onie:
Standard
..
Arsenic.,
MON.
(2/month)
MON.
(2/month)
Monitor
(monthly)
Cadmium.
MON.
(monthly)
Chromium
No requirement
C anide - .
Lin -lit
22
6.3
22
' 5.9
.Lead
No requirement
Vremnt
Nickel..
No re uiremnt
Co er
MON.
Mercury
No requirement
No re rant
Selenium.,
No requirement
No re mnt
I'Zinc
ON'
/
MON.
MON.
Chlorides':-
MON (monthly)
MON
(monthly)
Monthly monitoring for cadmium will be required with this renewal/expansion. The facility has
had only 2 cadmium values of 106 samples reported above detection level within the past 2
years. Additionally, the 2 reportable values were recorded at the detection level (and under the
allowable level). Lead, chromium, mercury, and silver limits/monitoring will be eliminated with
this renewal. The reasonable potential analyses for these parameters were performed and not
predicted to exceed allowable levels (although dropped from the permit, these parameters will
have to be monitored quarterly through the LTMP). Cyanide will continue to be limited with
this permit. Arsenic was recently reported at a level above the detect; because all other values
have been reported below the MDL and the single value detected was below the allowable level,
monitoring (2/month) is recommended with this permit cycle. Copper and zinc monitoring will
be required 2/month (reported values were significantly higher than the action level standard
allowable). Chloride values have also been recorded well above the allowable level and
monitoring for chlorides will be required monthly (the facility is currently monitoring monthly
for this parameter).
TOXICITY TESTING:
Recommended Requirement: Chronic P/F @ 79% (at 0.84 MGD); 84% at 1.2 MGD.
The last toxicity failure was reported May 1998. However, the Town began testing at 79% prior
to modification of the permit (with the change in 7Q l0s flow) and the Town received a "bad
test" for January 2000.
COMPLIANCE SUMMARY:
The facility appears to be compliant with permitted limits at this time. The facility has had
sporadic toxicity problems in the past, but this appears to be corrected.
INSTREAM MONITORING:
The Town performs its own instream monitoring (appx. 1/8 mile upstream and 1/4 mile
downstream) on Denson's Creek. Instream monitoring indicates slightly less dissolved oxygen
at the downstream sampling site, with no values recorded below the WQ standard of 5 mg/l.
PROPOSED CHANGES
Based on WQ modeling, the limits for oxygen consuming parameters will be more stringent
upon expansion of flow to 1.2 MGD.
'Fro1 W `VI.,j.a
N IDES Permit. keno,-Vaj/ lodificahon
Page 2

PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: July 12, 2000 (est.)
Permit Scheduled to Issue: August 28, 2000 (est.)
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contaA Susan Wilson it [phone] ext. 510.
♦ 23 CIO
S�dgAN A. WILSON
REGIONAL OFFICE COMMENT:
NAME: DATE: ✓�O G�
I roy 44 wTP
MIDES Permit Renewal/Modification
Paae

A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31) Permit No. NCO028916
During the period beginning on June 1, 1995 of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall(s)
serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 20'C""
Total Suspended Residue"
NH3 as N
Dissolved Oxygen'""
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Conductivity
Discharge Limitations
Monthly Avg. Weekly Avg.
0.840 NM
13.0 mg/l 19.5 mg/I
30.0 mg/I 45.0 mg/I
2.0 mg/I
200.0 /100 ml 400.0 /100 ml
Monitoring
Regulrements
Measurement
sample
*Sample
Dail- Max Freguency
IY"
Location
Continuous
Recording
I or E
3/Week
Composite
E, I
3/Week
Composite
E, I
3/Week
Composite
E
3/Week
Grab
E, U, D
3/Week
Grab
E,U,D
3/Week
Grab
E
Daily
Grab
E
Quarterly
Composite
E
Quarterly
Composite
E
3/Week
Grab
U, D
* Sample locations: E - Effluent, I - Influent, U - Upstream 100 feet, D - Downstream 0.4 mi. before 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.
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
**** Chronic Toxicity (Ceriodaphnia) P/F at o, January, April, July, and October, See Part III, Condition G.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 3/week at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31) Permit No. NCO028916 ,
During the period beginning on June 1, 1995 of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall(s)
serial number 001. (Continued)
Effluent Characteristics
Cadmium
Chromium
Lead -
Cyanide _ -
Copper
Discharge Limitations
Units (specify)
Monthly AM Weekly Avg, Daily Max
WIX4L Mon) l��'/�- a 2:-2- #g-/h - - -._ . 5.4-ug/1
D/2oP -54.0 ug/I
D20 P 27-,a-.fig/4-- 3 7. 0 u g/ 1
-4 µg/I 2.1-:6- ug/1
(�onli �oJZ- nn��1i�G' b 3 ZZ
Nickel
Zinc _
Chronic Toxicity"" plc- _
Silver
Temperature
"L'0lu ✓]t -7 l41N7�JL I
-020P
-1 (NkoNi i4 I/ MadF-op-
_ L
Monitoring
Regulrements
Measurement
Sampele
'_Sample
Frequency
Tvpe
Locatlon
Weekly
Composite
E
Weekly
Composite
E
Weekly
Composite
E
Weekly
Grab
E
2/Month
Composite
E
2/Month
Composite
E
2/Month
Composite
E
Quarterly
Composite
E
2/Month
Composite
E
Lek ���
Grab
U,D

ki
A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NCO028916
During the period beginning on June 1, 1995 and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number
001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 200C`*
Total Suspended Residue**
NH3 as N
Dissolved Oxygen***
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Conductivity
Discharge Limitations
Monthly Avg. Weekly Avg,
0.840 MICA
26.0 mg/1 39.0 mg11
30.0 mg/1 . 45.0 mg/I
4.0 mg/I
200.0 /100 ml 400.0 /100 ml
Monitoring
Requirements
Measurement
Sample
*Sample
Daily Max Frequency
IX"
Location
Continuous
Recording
I or E
3/Week
Composite
E, I
3/Week
Composite
E, I
3/Week
Composite
E
3/Week-
Grab
E, U, D
3/Week
Grab
E,U,D
3/Week
Grab
E
Daily
Grab
E
Quarterly
Composite
E
Quarterly
Composite
E
3/Week
Grab
U, D
* Sample locations: E - Effluent, I - Influent, U - Upstream, D - Downstream 0.4 mi. before 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.
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
**** Chronic Toxicity (Ceriodaphnia) P/F at 90%, January, April, July, and October, See Part III, Condition G.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored 3/week at the effluent by grab
sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NCO028916
During the period beginning on June 1, 1995 and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number
001. (Continued)
Effluent Characterlstics
Cadmium
Chromium
Lead
Cyanide
Copper
is el
Zinc
Chronic Toxicity""
—s4ve r
Temperature
E: ■
��to�cDmE5
Discharge Limitations
Units (specify)
Monthly AVa. Weekly Avg, Daily Max
-- 2-.2 µg%1 — 5.4 ug/1
g/I /I
�•� Zz
cd, Iv, &(L- E S)
Monitoring
Requlrements
Measurement
Sample
•Sample
Frequency
Type
Location
Weekly
Composite
E
Weekly
Composite
E
Weekly
Composite
E
Weekly
Grab
E
2/Month
Composite
E
2/Month
Composite
E
2/Month
Composite
E
Quarterly
Composite
E
2/Month
Composite
E
3/Week
Grab
U,D

SOC PRIORITY PROJECT: YES_ NO X
If Yes, SOC No.
To: Permits and Engineering Unit
NPDES Section
Attention: Susan Wilson
Date: November 29. 1999
AUTHORIZATION TO CONSTRUCT
NON -DISCHARGE STAFF REPORT AND RECOMMENDATION
COUNTY: Scotland
Permit No. WQ 0028916
PART I - GENERAL INFORMATION
1. Facility and Address: Town of Troy
444 N. Main Street
Troy, NC 27371-2799
2. Date of On -Site Investigation (if conducted): 11/22/99
3. Report Prepared by: Grady Dobson, Environmental Engineer, FRO
4. Persons Contacted and Telephone Number: Gray Walls
[phone]
5. Verified Discharge Point(s), List for all discharge points:
Latitude: 35' 22 ' 25" Longitude: 790 51' 33"
Attach a U.S.G.S. map extract and indicate treatment facility site and discharge point on map.
Ensure discharge point(s) correspond to NPDES permitted discharge points.
U.S.G.S. Quad No.: F 19 NE U.S.G.S. Quad Name: Star, NC
6. Size (land available for expansion and upgrading): Greater than 10 acres
7. Topography (relationship to flood plain included):
The proposed improvements are outside the 100 year flood plain. The WWTP
site is hilly with generally sloping terrain (0-7% slope).
8. Location of nearest dwelling: None within 2,500 feet

PART H - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
Type of existing treatment facility:
The existing treatment facility consists of flow equalization from a previously
permitted lagoon system, a 0.84 MGD wastewater treatment system, mechanical
bar screen, grit removal, aeration (oxidization ditch) secondary clarification with
sludge digestion and sludge holding with disinfection. (See NPDES Staff
Report.)
2. Sludge handling and disposal scheme:
3. Treatment plant classification: Grade III (See attached Rating Sheet)
4. SIC Code(s):
Wastewater Code(s):
Primary: 01 Secondary: 02
Main Treatment Unit Code: 1 0 0 0 3
PART III - EVALUATION AND RECOMMENDATIONS
The subject ATC consists of upgrading the existing bar screen and grit removal system. These
items are being replaced with equipment comparable to what's existing. The existing
disinfection facility sits on the bank of Denson's Creek; so, on occasion it is flooded. This ATC
is primarily to relocate the chlorine contact chamber to a point above the 100 year flood
elevation (see Plans) and the addition of dechlorination facilities. The Town also proposes to
add UV disinfection to be the primary method of disinfection. The chlorinate and dechlorination
facilities will be only utilized as backup. If you have any questions, please advise.
- J�/ 06 - ��) �
Signature of Rep reparer
Water Qual6Aegional Supervi r
>//29�9��
Date

SOC PRIORITY PROJECT: Yes % No _
If yes, SOC No. _EKC No. 92-20_
. (SOC is Pending)
To: Attention: Charles Alvarez
Permits and Engineering Unit
Water Quality Section
NPDES STAFF REPORT AND RECO}4 MATIONS_
Town of Troy
Montgomery County
permit No. NC0028916
PART I. GENERAL IKFORKATION
1. Facility and -Address: Town of Troy Wastewater Treatment Facility
444 Borth }lain Street
Troy, N.C. 27371
2. Date of Investigation: June 23, 1993
3. Report Prepared By: Paul E. Rawls
4. Persons Contacted and Telephone Number: Bill Curlee, [phone]
5. Directions to Site: From NC Hwy 134 north of Troy, turn on SR 1324 and
travel approximately .3 miles, turn left on dirt road entering facility.
6. Discharge Point(s), List for all discharge points:
Latitude: 35° 22' 25" - Longitude: 790 51 -3311
Attach a USGS map extract and indicate treatment facility site and
discharge point on nap.
USGS Quad No.: F19 N USGS Quad Kane:
7. Site size.and expansion area consistent with application?
X_ Yes No (If.no, explain)
8. Topography (relationship to flood plain included): Sloping toward the
adjacent receiving strean, Denson's Creek. The facility has flooded at
least once during the last permit cycle. Units flooded, chlorine contact
basin and lagoons. The site is not viewed as having chronic flooding
problems.
9. Location of nearest dwelling: .None within 1000 feet

10. Receiving stream or affected surface waters: Denson's Creek
a. Classification: ''C°
b. River Basin and Subbasin No.: 030715
c. Describe receiving stream features and pertinent downstream uses:
Recreational fishing and wildlife.
PART II - DESCRIPTION OF DISCURGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be pernitted: 0,_84 NGD (Ultimate Design
Capacity)
b. What is the current permitted capacity of the Wastewater Treatment
facility? 0.84 NGD
c. Actual treatment capacity of the current facility (current design
- capacity), `0.84 KGD
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two (2) years.
see Comment section IV
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities. Facility consists of an
influent bar and static screen, coaminutor, aeration basin, dual
secondary clarifier, post chlorination, automatic recording effluent
flow, neter, aerated sludge holding tank and sludge drying beds.
f. Please provide a description of proposed wastewater treatment
facilities: None at this time.
g. Possible toxic impacts to surface waters: None reported -or expected
h. Pretreatment Program POTWs only):
In development Approvea _x_
Should.be required Not needed
2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DEN Permit
No. W00001240.
Residual Contractor To date the Town has been taking the bulk of
the waste residuals to the County landfill for
disposal.
The Towns contract hauler is EWR
Telephone Nunber [phone]
b, Residuals stabilization: PSRP _ PFRP _ Other _
c. Landfill: Drying Beds to County Landfill
d. Other disposal/utilization scheme (Specify):

a
3. Treatment plant classification (attach completed rating sheet):
4. SIC Code(s):
Primary 4941 Secondary _ _ — _
Rain Treatment Unit Code: 0 5 0 0 1
PART III - OTHER PERTINEN'P ntFORNMON
1. Is this facility being constructed with Construction Grants Funds or are
any public monies involved (municipals only)? N/A
2. Special monitoring or limitations (including toxicity) requests: None
3. Important SOC, JOC, or Compliance Scbedule dates (please indicate):
Date
Submission of Plans and Specifications . . .. . . . . July 1, 1995
Begin Construction . . . . . . . . . . . . . . . . . . February 1, 1996
Complete Construction . . . . : .. . . . . . . . . . February 1, 1997
4. Alternative Analysis Evaluation: Has the facility evaluated all of the
nondiscbarge options available. Please provide regional perspective for
each option evaluated.
Spray Irrigation: Existing facility, flow.rate and area do not lend
itself to Spray Irrigation.
Connection to Regional Sewer System: No Regional Plant present or
planned.
Subsurface: Impractical for flow rate
Other disposal options: N/A
5. Other Special Items:

PART IQ E9AIdTATION AND RSMEMATION
Facility has had difficulty in meeting effluent limitation for toxicity,
.xyanide, cadmium and lead. Test modification for cyanide determination has
resulted in better compliance with the that limit and other parameters are
covered in Special Order by.Consent NO. 92-20.
on October ll, 1993 the Town was granted a modification to WQ0001290.
Covered under the modification was the use of the existing primary lagoon as
emergency influent equalization (formally used on emergency events but not
permitted) during extrene I/I events and the use of the existing secondary
lagoon as sludge storage between land application events. The use of the
secondary lagoon will alleviate excessive sludge inventory arkill allow
better operation of the facility. _
It is the recommendation of this office to reissue the NPDES Permit
NCO028916 in keeping with the basinwide strategy.
Signature of Report Preparer
rater Quality Regional Supervisor
tglg3
Date

NC0028916
Facility: Troy WWTP
Discharge to: Denson's Creek
Stream class and index #:
Residual Chlorine
Ammonia as NH3
(summer)
7010 (CFS)
0.35
7010 (CFS)
0.35
DESIGN FLOW (MGD)
0.84
DESIGN FLOW (MGD)
0.84
DESIGN FLOW (CFS)
1.302
DESIGN FLOW (CFS)
1.302
STREAM STD (UG/L)
17.0
STREAM STD (MG/L)
1.0
UPS BACKGROUND LEVEL (UG/L)
0
UPS BACKGROUND LEVEL (MG/L)
0.22
IWC (%)
78.81
IWC (%)
78.81
Allowable Conc. (ug/1)
21.57
Allowable Concentration (mg/1)
1.21
minimum = 2
Ammonia as NH3
(winter)
7Q10 (CFS)
2.42
Fecal Limit
200/100ml
DESIGN FLOW (MGD)
0.84
Ratio of 0.3 :1
DESIGN FLOW (CFS)
1.302
STREAM STD (MG/L)
1.8
UPS BACKGROUND LEVEL (MG/L)
0.22
IWC (%)
34.98
Allowable Concentration (mg/1)
4.74
minimum = 4

NC0028916
Facility: Troy WWTP
Discharge to: Denson's Creek
Stream class and index #:
Residual Chlorine
Ammonia as NH3
(summer)
7010 (CFS)
0.35
7010 (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
UPS BACKGROUND LEVEL (UG/L)
0
UPS BACKGROUND LEVEL (MG/L)
0.22
IWC (%)
84.16
IWC (%)
84.16
Allowable Conc. (ug/1)
20.20
Allowable Concentration (mg/1)
1.15
minimum = 2
Ammonia as NH3
(winter)
7010 (CFS)
2.42
Fecal Limit
200/100ml
DESIGN FLOW (MGD)
1.2
Ratio of 0.2 :1
DESIGN FLOW (CFS)
1.86
STREAM STD (MG/L)
1.8
UPS BACKGROUND LEVEL (MG/L)
0.22
IWC (%)
43.46
Allowable Concentration (mg/1)
3.86
minimum = 4

2(o I
S5•'16
toZz
Zz
-7,3
(0 7
1.23
ck-I oc� e,))
TOXICANT ANALY515
Troy WWT1
May 1998 - April 2000
Facility Name
Troy WWTP
Parameter=
Cd
P
NPDES #
NCO028916
Standard =
2
pg/I
IC
Qw (MGD)
0.84
7010s (cfs)
0.35
n
BDL=1/2DL
ctual Datal
RESULTS
/WC pq
78.81
1
2
6 2
1 Std Dev.
0.299745325
c'ving Stream
Denson's Creek
2
2
z/99 2
Mean
0.79245283
Stream Class
3
1
<2
C.V.
0.378250053
4
1
<2
FINAL RESULTS
5
1
<2
Cd ✓
6
1
<2
Mult Facto
1.3
ax. Pred Cw
//ojt—o9-2.6
ug/
7
1
<21
Max. ValUE
2
gg/
Allowable Cw
Z q u .s e ; 2.5
ug/
8
1
<2
Max. Pred
2.6
Ng/
Max. Value
Mom- aF 06 2
9
1
<2
Allowable
2.54
jug/
Ni
10
1
<2
Max. Pred Cw
12.65
ug/
11
1
<2
Allowable Cw
Po R�cQfJi1' 111.7
ug/1
12
1
<2
Max. Value
11
13
1
<2
Pb (lead) ✓
14
1
<2
Max. Pred Cw
12
ug/
15
1
<2
Allowable Cw
ND MT' 31.7
ug/
16
1
<2
Max. Value
10
171
1
<2
Cr ✓
18
1
<2
Max. Pred Cw
13
ug/
19
1
<2
Allowable Cw
Po P" MT ' 63.4
ug/
20
1
<2
Max. Value
10
21
1
<2
CN- V
22
1
<2
Max. Pred Cw
33
ug/1
23
1
<2
Allowable Cw
L-tM 1 i 6.3
ug/
24
1
<2
Max. Value
22
25
1
<2
As
26
1
<2
Max. Pred Cw
81.6
ug/
27
1
<2
Allowable Cw
F 63.4
ug/
28
1
<2
Max. Value
24
29
1
<2
Se V
30
1
<2
Max. Pred Cw
5
ug/
31
1
<211
Allowable Cw
fJo 6.3
ug/
32
1
<2
Max. Value
5
33
1
<2
Cu v
34
1
<2
Max. Pred Cw
{t. I_, 106.5
ug/
35
1
<2
Allowable Cw
p1tor d r 8.9
ug/
36
1
<2
Max. Value
ctjLV 71
37
1
<2
Zn ✓
38
1
<2
Max. Pred Cw
6279
ug/
39
1
<2
Allowable Cw
63.4
ug/
40
1
<2
Max. Value
fjL 1610
41
1
<2
Ag (silver)
42
1
<2
Max. Pred Cw
ALL. VA LV&S
g/
43
1
<2
Allowable Cw
4S 0.1
ug/
44
1
<2
Max. Value
.` (vo (6p 72-5
45
1
<2
46
1
<2
Max. Pred Cw
U- 6056 0
ug/
47
1
<2
Allowable Cw
TAW V, z- 0.0
ug/
48
1
<2
Max. Value
0
49
1
<2
a4 Dg s
50
1
<2
Max. Pred Cw
0
L
pnr 51
1
<2
Allowable Cw
52
1
<2
Max. Value
0
0 53
1
<2
541
11
<2
6/15/00

TOXICANT ANALY515
Troy WWTI'
May 1998 - April 2000
55
1
<2
56
1
<2
57
1
<2
58
1
<2
59
0.5
<1
601
0.5
<1
61
0.5
<1
62
0.5
<1
63
0.5
<1
64
0.5
<1
65
0.5
<1
661
0.5
<1
67
0.5
<1
68
0.5
<1
69
0.5
<1
70
0.5
<1
71
0.5
<1
721
0.5
<1
73
0.5
<1
74
0.5
<1
75
0.5
<1
76
0.5
<1
77
0.5
<1
781
0.5
<1
79
0.5
<1
80
0.5
<1
81
0.5
<1
82
0.5
<1
83
0.5
<1
841
0.5
<1
85
0.5
<1
86
0.5
<1
87
0.5
<1
88
0.5
<1
89
0.5
<1
901
0.5
<1
91
0.5
<1
92
0.5
<1
93
0.5
<1
94
0.5
<1
95
0.5
<1
961
0.5
<1
97
0.5
<1
98
0.5
<1
99
0.5
<1
100
0.5
<1
101
0.5
<1
1021
0.5
<1
103
0.5
<1
104
0.5
<1
105
0.5
<1
106
0.5
<1
107
108
109
110
111
0/15/00

TOXICANT ANALY515
Troy WWTP
May 1998 - April 2000
ameter=
Ni
Parameter=
Pb (lead)
P
tandard =
88
,ug/I
:Standard =
25
pg/I
n
0L=1/2D
Actual Data
RESULTS
n
DL=1/2D
Actual Data
RESULTS
1
11
11
Std Dev.
0.85714
1
5
<10
Std Dev.
0.9285
2
5
<10
Mean
5.12245
2
5
<10
Mean
5.1724
3
5
<10
C.V.
0.16733
3
5
<10
C.V.
0.1795
pg/I```
gg
pg/I::::
4
5
<10
4
5
<10
5
5
<10
5
5
<10
6
5
<10
Mult Factor
1.15
6
10
10
Mult Factor
1.2
7
5
<10
Max. Value
11
pg/I:::: 7
5
<10
Max. Value
10
8
5
<10
Max. Pred
12.65
,ug/I:::: 8
5
<10
Max. Pred Cv,
12
9
5
<10
Allowable C
111.66
pg/I::::: 9
5
<10
Allowable C
31.72
10
5
<10
10
5
<10
11
5
<10
11
5
<10
12
5
<10
12
5
<10
13
5
<10
13
5
<10
14
5
<10
14
5
<10
15
5
<10
15
5
<10
16
5
<10
16
5
<10
17
5
<10
17
5
<10
18
5
<10
18
5
<10
19
5
<10
19
5
<10
20
5
<10
20
5
<10
21
5
<10
21
5
<10
22
5
<10
22
5
<10
23
5
<10
23
5
<10
24
5
<10
24
5
<10
25
5
<10
25
5
<10
26
5
<10
26
5
<10
27
5
<10
27
5
<10
28
5
<10
28
5
<10
29
5
<10
29
5
<10
301
5
<10
31
5
<10
32
5
<10
33
5
<10
34
5
<10
35
5
<10
361
5
<10
37
5
<10
38
5
<10
39
5
<10
40
5
<10
41
5
<10
421
5
<10
43
5
<10
44
5
<10
45
5
<10
46
5
<10
47
5
<10
48
5
<10
49
5
<10
6/15/00

TOXICANT ANALY515
Troy WWTP
May 1998 - April 2000
6115100 . 4

TOXICANT ANALY515
Troy WW TP
May 1998 - April 2000
rameter=
Cr
€F'0rameter=
CN-
P
pg/l:::
pg/t '!
pg/[::::
tandard =
50
pg/I
;Standard =
5
pg/I
n
DL=1/2D
Actual DatE
RESULTS
n
3DL=1/2D
Actual Data
RESULTS
1
5
5
Std Dev.
1.00407
1
6
6
Std Dev.
2.05874
2
10
10
Mean
2.70476
2
6
6
Mean
2.86275
3
7
7
C.V.
0.37122
3
6
611
C.V.
0.71915
4
7
7
4
22
22
5
5
5
5
6
6
6
2.5
<5
Mu/t Factoi
1.3
6
6
6
Mu/t Facto
1.5
7
2.5
<5
Max. Value
10
pg/I::::: 7
2.5
<5
Max. VaIUE.
22
8
2.5
<5
Max. Pred 1
13
pg/1:. :.: 8
2.5
<5
Max. Pred
33
9
2.5
<5
Allowable C
63.44
pg/I::::: 9
2.5
<5
Allowable
6.34
10
2.5
<5
10
2.5
<5
11
2.5
<5
11
2.5
<5
121
2.5
<5
12
2.5
<5
13
2.5
<5
13
2.5
<5
14
2.5
<5
14
2.5
<5
15
2.5
<5
15
2.5
<5
16
2.5
<5
16
2,5
2.5
<5
<5
17
2.5
<5
17
181
2.5
<5
18
2.5
<5
19
2.5
<5
19
2.5
<5
20
2.5
<5
20
2.5
<5
21
2.5
<5
21
2.5
<5
22
2,5
<5
22
2.5
<5
23
2.5
<5
23
2.5
<5
24
2.5
<5
24
2.5
<5
25
2.5
<5
25
2.5
<5
26
2,5
<5
26
2.5
<5
27
2.5
<5
27
2.5
<5
28
2.5
<5
28
2.5
<5
291
2.5
<5
29
2.5
2.5
<5
<5
30
2.5
<5
30
31
2.5
<5
31
2.5
2.5
2.5
<5
<5
<5
32
2.5
<5
32
33
2.5
<5
33
34
2.5
<5
34
2.5
2.5
2.5
<5
<5
<5
35
2.5
<5
35
36
2.5
<5
36
37
2.5
<5
37
2.5
<5
38
2.5
<5
38
2.5
2.5
<5
<5
39
2.5
<5
39
40
2.5
<5
40
2.5
<5
41
2.5
<5
41
2.5
<5
42
2.5
<5
42
2.5
<5
43
2.5
<5
43
2.5
<5
44
2,5
<5
44
2.5
<5
45
2.5
<5
45
2.5
<5
46
2.5
<5
46
2.5
<5
47
2.5
<5
47
2.5
<5
48
2.5
<5
48
2.5
<5
49
2.5
<5
49
2.5
<5
50
2.5
<5
50
2.5
<5
51
2.5
<5
51
2.5
<5
52
2.5
<5
52
2.5
<5
53
2.5
<5
531
2.5
2.5
<5
<5
54
2.5
<5
54
6/15/00
5

TOXICANT ANALY515
Troy WWTP
May 1998 - April 2000
55
2.5
<5
55
2.5
2.5
2.5
2.5
<5
<5
<5
<5
56
2.5
<5
56
57
2.5
<5
57
58
2.5
<5
58
59
2.5
<5
59
2.5
<5
60
2.5
<5
60
2.5
<5
61
2.5
<5
61
2.5
<5
62
2.5
<5
62
2.5
<5
63
2.5
<5
63
2.5
<5
64
2.5
<5
64
2.5
2.5
<5
<5
65
2.5
<5
65
66
2.5
<5
66
2.5
<5
67
2.5
<5
67
2.5
<5
68
2,5
<5
68
2.5
<5
69
2.5
<5
69
2,5
<5
70
2.5
<5
70
2.5
<5
71
2.5
<5
71
2.5
<5
72
2.5
<5
72
2.5
<5
73
2.5
<5
73
2.5
<5
74
2.5
<5
74
2.5
2.5
2.5
<5
<5
<5
75
2.5
<5
75
761
2.5
<5
76
77
2.5
<5
77
2.5
<5
78
2.5
<5
78
2.5
<5
79
2.5
<5
79
2.5
<5
80
2.5
<5
80
2.5
<5
81
2.5
<5
81
2.5
<5
821
2.5
<5
82
2.5
<5
83
2.5
<5
83
2.5
<5
84
2.5
<5
84
2.5
<5
85
2.5
<5
85
2.5
<5
86
2.5
<5
86
2.5
<5
87
2.5
<5
87
2.5
<5
88
2.5
<5
88
2.5
<5
89
2.5
<5
89
2.5
<5
90
2.5
<5
90
2.5
<5
91
2.5
<5
91
2.5
<5
92
2.5
<5
92
2.5
<5
931
2.5
<5
93
2.5
<5
94
2.5
<5
94
2.5
<5
95
2.5
<5
95
2.5
<5
96
2.5
<5
96
2.5
<5
97
2.5
<5
97
2.5
<5
98
2.5
<5
98
2.5
<5
991
2.5
<5
99
2.5
<5
100
2,5
<5
100
2.5
<5
101
2.5
<5
101
2.5
<5
102
2,5
<5
102
2.5
<5
103
2.5
<5
104
2.5
<5
105
2.5
<5
6/15/00 6

TOXICANT ANALY515
Troy'WWTF
May 1998 - April 2000
rameter=
As
Parameter=
'Se
P:
tandard =
50
pg/I
;Standard =
5
pg/I
n
DL=1/2DActual
Data
RESULTS
n
DL=1/2D
ctual Data
RESULTS
1
24
24
Std Dev.
5.078
1
5
<10
Std Dev.
0
2
5
<10
Mean
6.3571
2
5
<10
Mean
5
3
5
<10
C.V.
0.7988
3
5
<10
C.V.
0
4
5
<10
4
5
<10
5
51
<10
5
5
<10
6
5
<10
Mult Facto
3.4
6
5
<10
Mult Facto
1.
7
5
<10
Max. Value
24
pg/1': 7
5
<10
Max. Value
5
pg/I
8
5
<10
Max. Pred
81.6
pg/I 8
5
<10
Max. Pred
5
pg/I:
9
5
<10
Allowable
63.44
pg/I 9
5
<10
Allowable
6.34
pg/l: :
10
5
<10
10
5
<10
11
5
<10
1.1
5
<10
12
5
<10
12
5
<10
13
5
<10
13
5
<10
14
5
<10
14
5
<10
15
5
<10
6/15/00
A

TOXICANT ANALY515
Troy WWTP
May 1998 - April 2000
6/15/00 8

TOXICANT ANALY515
Troy'WWTP
May 1998 - April 2000
rameter=
Cu
Pt rameter=
Zn
Ra
tandard =
7
pg/1
::'Standard =
50
pg/1
n
BDL=1 /2DL
kctual DatE
RESULTS
n
DL=1/2D
Actual Data
RESULTS
1
26
26
Std Dev.
12.736
1
54
54
Std Dev.
233.7
pg/f::
21
15
15
Mean
29.38
2
128
128
Mean
102.33
3
30
30
C.V.
0.4335
3
61
61
C.V.
2.2837
4
10
<20
4
48
48
5
71
71
5
53
53
6
25
25
Mult Facto
1.5
6
65
65
Mult Factoj
3.9
7
24
24
Max. Value
71
pg/I`:[:' 7
221
221
Max. Value
1610
81
26
26
Max. Pred
106.5
pg/I::::: 8
63
63
Max. Pred
6279
/jg/1:.-
pg/f::
91
34
34
Allowable C
8.88
pg/I::'9
47
47
Allowable
63.44
10
34
34
10
58
58
11
17
17
11
52
52
12
14
14
12
52
52
13
39
39
13
57
57
14
30
30
14
53
53
151
44
44
15
44
44
16
49
49
16
48
48
17
37
37
17
48
48
18
24
24
18
74
74
19
17
17
19
71
71
20
24
24
20
235
235
211
15
1511
21
68
68
22
24
24
22
56
56
23
18
18
23
58
58
24
37
37
24
58
58
25
27
27
25
42
42
26
20
20
26
48
48
27
16
16
27
581
58
28
17
17
28
1610
1610
29
12
12
29
43
43
30
13
13
30
124
124
31
43
43
31
103
103
32
50
50
32
49
49
33
33
33
33
52
52
34
46
46
34
136
136
35
33
33
35
39
39
36
26
26
36
52
52
371
37
37
37
103
103
38
49
49
38
40
40
39
36
36
39
37
37
40
36
36
40
40
40
41
37
37
41
88
88
42
49
49
42
43
43
431
36
36
43
38
38
44
36
36
44
39
39
45
37
37
45
49
49
46
24
24
47
21
21
48
25
25
49
18
18
50
8
8
6/15/00

TOXICANT ANALY515
Troy WWTF
May 1998 - April 2000
6/15/00 10

TOXICANT ANALY515
Troy , WTP
May 1998 - April 2000
ameter=
Ag (silver)
andard =
0.06
pg/I
n
DL=1/2D
ctual Dat
RESULTS
1
2.5
<5
Std Dev.
0
21
2.5
<5
Mean
2.5
3
2.5
<5
C.V.
0
4
2.5
<5
5
2.5
<5
6
2.5
<5
Mult Factol
1
7
2.5
<5
Max. Valuo
2.5
pg/
81
2.5
<5
Max. Pred
2.5
pg/
9
2.5
<5
Allowable
0.08
pg/
10
2.5
<5
11
2.5
<5
12
2.5
<5
13
2.5
<5
141
2.5
<5
15
2.5
<5
16
2.5
<5
17
2.5
<5
18
2.5
<5
19
2.5
<5
201
2.5
<5
21
2.5
<5
22
2.5
<5
23
2.5
<5
24
2.5
<5
25
2.5
<5
261
2.5
<5
27
2.5
<5
28
2.5
<5
29
2.5
<5
30
2.5
<5
31
2.5
<5
321
2.5
<5
33
2.5
<5
34
2.5
<5
35
2.5
<5
36
2.5
<5
37
2.5
<5
381
2.5
<5
39
2.5
<5
40
2.5
<5
41
2.5
<5
42
2.5
<5
43
2.5
<5
441
2.5
<5
45
2.5
<5
46
2.5
<5
47
2.5
<5
48
2.5
<5
6/15/00

TOXICANT ANALY515
Troy WWTf
May 1998 - April 2000
6/15/00 12

1)P,oP
Do A 1. VIP," P
TOXICANT ANALY515
Troy WWT'
May 1998 - April 2000
:Parameter=
Hg (mercury)
::::Standard =
0.012
pg/I
n3DL=1/2D
Actual Data
RESULTS
1
0.1
<0.2
Std Dev.
1.4E-09
2
0.1
<0.2
Mean
0.1
3
0.1
<0.2
C.V.
1.4E-08
4
0.1
<0.2
5
0.1
<0.2
6
0.1
<0.2
Mult Factor =
7
0.1
<0.2
Max. ValUE
0.1
pg/
8
0.1
<0.2
Max. Pred
0
Ng/
9
0.1
<0.2
Allowable
0.01
pg/
10
0.1
<0.2
11
0.1
<0.2
12
0.1
<0.2
13
0.1
<0.2
14
0.1
<0.2
15
0.1
<0.2
16
0.1
<0.2
17
18
19
20
21
6/20/00

TOXICANT ANALY515
Troy WWTP
May 1996 - April 2000
:arameter=
Chlroide
:Standard =
230
mg/I
n
BDL=1 /2D1
kctual Data
RESULTS
1
252
252
Std Dev.
143.574
2
315
315
Mean
421
3
169
169
C.V.
0.34103
4
330
330
5
381
381
6
416
416
Mult Facto
1.7
7
563
563
Max. VaIUE
689
mgll
8
664
664
Max. Pred
1171.3
mgll
9
343
343
Allowable
273.28
mglf
10
475
475
11
317
317
12
331
331
13
340
340
14
664
664
15
521
521
16
575
575
17
401
401
18
437
437
19
689
689
20
369
369
21
289
289
22
6/22/00

2",dioo
c,� i . %L (--lkv
I[AIT (5
aanlrro(L � I
GraIT -�3.Ca
�4P'rr S-71
`l,3
ivo,Jt;a(L- k , 23
TOXICANT ANALY515
Troy WWTP
May 1996 - April 2000
Facility Name
Troy WWTP
Parameter=
Cd
P
NPDES #
NCO028916
Standard =
2
pg/I
IC
Qw (MGD)
1.2
7010s (cfs)
0.35
2 n
BDL=1/2DL
ctual Data
RESULTS
IWC (%)
84.16
1
6 RR 2
2
Std Dev.
0.299745325
c'ving Stream
Denson's Creek
2
2
2
Mean
0.79245283
Stream Class
3
1
<2
C.V.
0.378250053
4
1
<2
FINAL RESULTS
5
1
<2
Cd
6
1
<2
Mult Facto
1.3
Max. Pred Cw
/pnf Tee 2.6
ug/
7
1
<2
Max. ValuE
2
pg/
Allowable Cw
ZldnLae OX 2.4
ug/
8
1
<2
Max. Pred
2.6
jig/
Max. Value
lo(o 2
9
1
<2
Allowable
2.38
pg/
Ni
10
1
<2
Max. Pred Cw
12.65
ug/
11
1
<2
Allowable Cw
Na ?E,6?!< 104.6
ug/
12
1
<2
Max. Value
11
13
1
<2
Pb (lead)
14
1
<2
Max. Pred Cw
12
ug/1
15
1
<2
Allowable Cw
oip/fir 29.7
ug/1
16
1
<2
Max. Value
10
17
1
<2
Cr
18
1
<2
Max. Pred Cw
13
ug/
19
1
<2
Allowable Cw
o re ttT. 59.4
ug/1
20
1
<2
Max. Value
10
21
1
<2
CN-
22
1
<2
Max. Pred Cw
33
ug/
23
1
<2
Allowable Cw
Llnq (i 5.9
ug/
24
1
<2
Max. Value
22
25
1
<2
As
26
1
<2
Max. Pred Cw
81.6
ug/
27
1
<2
Allowable Cw
1,-1 M I T 59.4
ug/
28
1
<2
Max. Value
24
29
1
<2
Se
301
1
<2
Max. Pred Cw
5
ug/
31
1
<2
Allowable Cw
LJO 1226 v,,5.9
ug/
32
1
<2
Max. Value
5
33
1
<2
CU
34
1
<2
Max. Pred Cw
106.5
ug/
35
1
<2
Allowable Cw
Mv rp 8.3
ug/
36
1
<2
Max. Value
0Q0 71
37
1
<2
Zn
38
1
<2
Max. Pred Cw
�. (,, 6279
ug/
39
1
<2
Allowable Cw
r(o J I ,>�L- 59.4
ug/
40
1
<2
Max. Value
cljl.,y 1610
41
1
<2
Ag (silver)
42
1
<2
Max. Pred Cw
X 2-5
ug/1
43
1
<2
Allowable Cw
0.1
ug/
44
1
<2
Max. Value
AT
Nof X12:5
45
1
<2
0
46
1
<2
Max. Pred Cw
0
ug/
47
1
<2
Allowable Cw
0.0
ug/
48
1
<2
Max. Value
0
49
1
<2
Cyanide
50
1
<2
ax. Pred Cw
0
ug/
51
1
<2
Allowable Cw
5.9
ug/
52
1
<2
Max. Value
01
53
1
<2
541
1
<2
6/15/00

TOXICANT ANALY515
Troy WWT'
May 1998 - April 2000
55
1
<2
56
1
<2
57
1
<2
58
1
<2
59
0.5
<1
601
0.5
<1
61
0.5
<1
62
0.5
<1
63
0.5
<1
64
0.5
<1
65
0.5
<1
661
0.5
<1
67
0.5
<1
68
0.5
<1
69
0.5
<1
70
0.5
<1
71
0.5
<1
721
0.5
<1
73
0.5
<1
74
0.5
<1
75
0.5
<1
76
0.5
<1
77
0.5
<1
781
0.5
<1
79
0.5
<1
80
0.5
<1
81
0.5
<1
82
0.5
<1
83
0.5
<1
841
0.5
<1
85
0.5
<1
86
0.5
<1
87
0.5
<1
88
0.5
<1
89
0.5
<1
901
0.5
<1
91
0.5
<1
92
0.5
<1
93
0.5
<1
94
0.5
<1
95
0.5
<1
961
0.5
<1
97
0.5
<1
98
0.5
<1
99
0.5
<1
100
0.5
<1
101
0.5
<1
1021
0.5
<1
103
0.5
<1
104
0.5
<1
105
0.5
<1
106
0.5
<1
107
108
109
110
111
6/15/00

T0XCANTANALY5|5
Troy'WWTP
Mmy193b Aph|2DO0
n
_
1
_
z
_
3
_
4
_
5
_
O
_
7
_
8
_
o
_
10
_
11
_
12
_
13
_
14
_
15
_
16
_
17
_
10
_
19
_
oO
_
21
_
22
_
23
_
24
_
25
_
20
29
D
Actual Data
RESULTS
6/15/00
5

TOXICANT ANALY515
Troy WWTf
May 1998 - April 2000
6/15/00 4

TOXICANT ANALY515
Troy WWTP
May 1998 -April 2000
rameter=
Cr
€€P�rameter=
CN-
P
pg/l :`:
pg/l::
pg/I: :
tandard =
50
pg/I
--':Standard =
5
pg/I
n
DL=1/2D
Actual DatE
RESULTS
n
DL=1/2D
Actual Data
RESULTS
1
5
5
Std' Dev.
1.00407
1
6
NI %9 6
Std Dev.
2.05874
2
10
10
Mean
2.70476
2
6
6
22
179 6
6
22
Mean
C.V.
2.86275
'0.71915
3
7
7
C.V.
0.37122
3
4
7
7
4
5
5
5
5
6
6
6
2.5
<5
Mult Factor
1.3
6
6
6
Mult Facto
1.5
7
2.5
<5
Max. Value
10
pg/I::: ` 7
2.5
<5
Max. Valu
22
8
2.5
<5
Max. Pred 1
13
pg/I::::: 8
2.5
<5
Max. Pred
33
9
2.5
<5
Allowable q
59.41
pg/I :::: 9
2.5
<5
Allowable
5.94
10
2.5
<5
10
2.5
<5
11
2.5
<5
11
2.5
<5
12
2:5
<5
12
2.5
2.5
2.5
<5
<5
<5
13
2.5
<5
13
14
2.5
<5
14
15
2.5
<5
15
2.5
<5
16
2.5
<5
16
2.5
<5
17
2.5
<5
17
2.5
2.5
2.5
<5
<5
<5
18
2.5
<5
18
19
2.5
<5
19
20
2.5
<5
20
2.5
<5
21
2.5
<5
21
2.5
<5
22
2.5
<5
22
2.5
<5
23
2.5
<5
23
2.5
2.5
<5
<5
24
2.5
<5
24
25
2.5
<5
25
2.5
2.5
2.5
<5
<5
<5
26
2.5
<5
26
27
2.5
<5
27
------------
28
2.5
<5
' 28
2.5
2.5
2.5
2.5
2.5
2.5
<5
<5
<5
<5
<5
<5
29
2.5
<5
29
30
2.5
<5
30
31
2.5
<5
31
32
2.5
<5
32
33
2.5
<5
33
34
2.5
<5
34
2.5
2.5
2.5
<5
<5'
<5
35
, 2.5
<5
35
36
2.5
<5
36
37
2.5
<5
37
2.5
<5
38
2.5
<5
38
2.5
2.5
<5
<5
39
2.5
<5
39
40
2.5
<5
40
2.5
<5
41
2.5
<5
41
2.5
<5
42
2.5
<5
42
2.5
<5
43
2.5
<5
43
2.5
<5
44
2.5
<5
44
2.5
<5
451
2.5
<5
45
2.5.
<5
46
2:5
<5'
46
2.5
<5
47
2.5
<5
47
2.5
<5
' 48
2.5
<5
48
2.5
<5
49
2.5
<5
49
2.5
<5
50
.2.5
<5
50
2.5
<5
51
2.5
<5
51
2.5
<5
52
2.5
<5
52
2.5
<5
53
2.5
<5
53
2,5
2.51
<5
<5
54
2.5
<5
54
6/15/00
5

TOXICANT ANALY515
Troy WWTP
May 1998 April 2000
55
2,5
<5
55
2.5
2.5
2.5
2.5
2.5
2.5
2.5
2.5
<5
<5
<5
<5
<5
<5
<5
<5
56
2.5
<5
56
57
2.5
<5
57
58
2.5
<5
58
59
2.5
<5
59
601
2.5
<5
60
61
2.5
<5
61
62
2.5
<5
62
63
2.5
<5
63
2.5
<5
64
2.5
<5
64
2.5
<5
65
2.5
<5
65
2.5
2.5
2.5
2.5
2.5
<5
<5
<5
<5
<5
661
2.5
<5
66
67
2.5
<5
67
68
2.5
<5
68
69
2.5
<5
69
70
2.5
<5
70
2.5
<5
71
2.5
<5
71
2.5
2.5
2.5
<5
<5
<5
721
2.5
<5
72
73
2.5
<5
73
74
2.5
<5
74
2.5
2.5
2.5
2.5
2.5
<5
<5
<5
<5
<5
75
2.5
<5
75
76
2.5
<5
76
77
2.5
<5
77
781
2.5
<5
78
79
2.5
<5
79
2.5
<5
80
2.5
<5
80
2.5
<5
81
2.5
<5
81
2.5
2.5
2.5
<5
<5
<5
82
2.5
<5
82
83
2.5
<5
83
841
2.5
<5
84
2.5
2,5
2.5
2.5
<5
<5
<5
<5
85
2.5
<5
85
86
2.5
<5
86
87
2.5
<5
87
88
2.5
<5
88
2.5
2.5
<5
<5
89
2.5
<5
89
901
2.5
<5
90
2.5
<5
91
2.5
<5
91
2.5
<5
92
2.5
<5
92
2.5
<5
93
2.5
<5
93
2.5
<5
94
2.5
<5
94
2.5
<5
95
2.5
<5
95
2.5
<5
961
2.5
<5
96
2.5
<5
97
2.5
<5
97
2.5
<5
98
2.5
<5
98
2.5
<5
99
2.5
<5
99
2.5
<5
100
2.5
<5
100
2.5
<5
101
2.5
<5
101
2.5
<5
1021
2.5
<5
102
2.5
<5
103
2.5
<5
104
2.5
<5
105
2.5
<5
6/15/00 6

TOXICANT ANALY515
Troy WWTI'
May 1998 - April 2000
rameter=
As
Parameter=
Se
f?'
tandard =
50
pg/I
standard =
5
pg/I
n
3DL=1/21D
kctual Data
RESULTS
n
3DL=1/2DActual
Data
RESULTS
1
24
0024
Std Dev.
5.078
1
5
<10
Std Dev.
0
2
5
<10
Mean
6.3571
2
5
<10
Mean
5
3
5
<10
C.V.
0.7988
3
5
<10
C.V.
0
4
5
<10
4
5
<10
5
5
<10
5
5
<10
6
5
<10
I Mult Facto
3.4
6
5
<10
Mult Facto
1
7
5
<10
Max. Value
24
pg/I::
7
5
<10
Max. Value
5
pg/l:::
8
5
<10
Max. Pred
81.6
pg/I :
8
5
<10
Max. Pred
5
pg/I ':
9
5
<10
Allowable C
59.41
pg/I`
9
5
<10
Allowable
5.94
pg/I:::
10
5
<10
10
5
<10
11
5
<10
11
5
<10
12
5
<10
12
5
<10
13
5
<10
13
5
<10
14
5
<10
14
5
<10
15
5
<10
6/15/00
7

TOXICANT ANALY515
Troy WWTP
May 1996 - April 2000
6/15/00 8

TOXICANT ANALY515
Troy WWTP
May 1995 - April 2000
ameter=
Cu
F?�rameter=
Zn
Ra
pg/[`
pg/€:€:
pg/E
tandard =
7
pg/I
::'.;Standard =
50
pg/I
n
BDL=1 /2DL
actual Date
RESULTS
n
3DL=l/21D
Actual Data
RESULTS
1
26
26
Std Dev.
12.736
1
54
54
Std Dev.
233.7
21
15
15
Mean
29.38
2
128
128
Mean
102.33
3
30
30
C.V.
0.4335
3
61
61
C.V.
2.2837
4
10
<20
4
48
48
5
71
71
5
53
53
6
25
25
Mult Factot
1.5
6
65
65
Mult Facto
3.9
7
24
24
Max. Value
71
pg/L 7
221
221
Max. Value
1610
8
26
26
Max. Pred 1
106.5
pg/l €: 8
63
63
Max. Pred
6279
9
34
34
Allowable C
8.32
pg/I :. 9
47
47
Allowable
59.41
10
34
34
10
58
58
11
17
17
11
52
52
12
14
14
12
52
52
13
39
39
13
57
57
14
30
30
14
53
53
15
44
44
15
44
44
16
49
49
16
48
48
17
37
37
17
48
48
18
24
24
18
74
74
19
17
17
19
71
71
20
24
24
20
235
235
211
15
15
21
68
68
22
24
24
22
56
56
23
18
18
23
58
58
24
37
37
24
58
58
25
27
27
25
42
42
26
20
20
26
48
48
27
16
16
27
58
58
28
17
17
28
1610
1610
29
12
12
29
43
43
30
13
13
30
124
124
31
43
43
31
103
103
321
50
50
32
49
49
33
33
33
33
52
52
34
46
46
34
136
136
35
33
33
35
39
52
39
52
36
26
26
36
37
37
37
37
103
103
38
49
49
38
40
40
39
36
36
39
37
37
40
36
36
40
40
40
41
37
37
41
88
88
42
49
49
42
43
43
431
36
36
43
38
38
44
36
36
44
39
39
45
37
37
45
49
49
46
24
24
47
21
21
48
25
25
49
18
18
50
8
8
6/15/00

TOXICANT ANALY515
Troy WWTP
May 1998 - April 2000
6/15/00 10

k
TOXICANT ANALY515
Troy WWTP
May 1998 - April 2000
ameter=
Ag (sliver)
andard =
0.06
pg/I
n3DL=1/2D
kctual Dat
RESULTS
1
2.5
<5
Std Dev.
0
21
2.5
<5
Mean
2.5
3
2.5
<5
C.V.
0
4
2.5
<5
5
2.5
<5
6
2.5
<5
Mult Factod
1
7
2.5
<5
Max. Value
2.5
pg/
81
2.5
<5
Max. Pred 1
2.5
jig/
9
2.5
<5
Allowable C
0.07
pg/
10
2.5
<5
11
2.5
<5
12
2.5
<5
13
2.5
<5
141
2.5
<5
15
2.5
<5
16
2.5
<5
17
2.5
<5
18
2.5
<5
19
2.5
<5
201
2.5
<5
21
2.5
<5
22
2.5
<5
23
2.5
<5
24
2.5
<5
25
2.5
<5
261
2.5
<5
27
2.5
<5
28
2.5
<5
29
2.5
<5
30
2.5
<5
31
2.5
<5
32
2.5
<5
33
2.5
<5
34
2.5
<5
35
2.5
<5
36
2.5
<5
37
2.5
<5
38
2.5
<5
39
2.5
<5
40
2.5
<5
41
2.5
<5
42
2.5
<5
43
2.5
<5
44
2.5
<5
45
2.5
<5
46
2.5
<5
47
2.5
<5
48
2.5
<5
6/15/00

TOXICANT ANALY515
Troy WWTf
May 1998 - April 2000
6/15/00 12

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Re: reuse rules
Subject: Re: reuse rules
Date: Mon, 29 May 2000 07:27:25 -0400
From: Dave Goodrich <[e-mail]>
To: Ken Averitte <[e-mail]>, Kim Colson <[e-mail]>,
Shannon Thornburg <[e-mail]>
CC: Susan A Wilson <[e-mail]>
Ken,
Typically, the re -use projects are handled in Kim's shop. (I'm copying
Shannon because she's had a fair amount of experience with these type
systems.) I'll "sideways delegate" this and ask for Kim or Shannon to
respond. If you need to contact someone in NPDES, Susan can help out.
- Dave
Ken Averitte wrote:
> I hope this goes to the NPDES Dave.
> Gray Walls wants to use a portion of Troy's effluent to irrigate the
> local golf course. Should I direct him to talk to you? They are planning
> to pump from the treatment plant to an irrigation reservoir built at the
> golf course for temporary storage. Obviously, the POTW wouldn't be
> dependent on any daily volume to be disposed of, so the volume/day
> shouldn't be as much concern as the routine land application permit. He
> contends that he can meet the limits for golf course application.
> What's the next step? Do we have a specific application for reuse?
> thanks for any guidance.
> Ken A
1 of 1 5/30/00 10:54 AM

Narrative for NC DENR/DWQ/NPDES PERMIT APPLICATION- STANDARD FORM A
TOWN OF TROY
Permit Number NCO028916
6. Facility Description
a. The Town of Troy has an activated sludge/ aerobic digestion wastewater treatment plant. The
plant has dual bar screens. An old style bar screen with approximately 1 %2" openings is mounted
in front of a "Rotomat" fine screen drum bar screen. The Rotomat is designed for 1.5 MGD. The
grit handling system is a S & L Pista Grit system with capacity to 1.2 MGD. The influent pump
station is a Gorman & Rupp T6 suction lift pump station sized for 1.2 MGD. The plant has dual
oxidation ditches with two dual speed brush rotors in each ditch. The ditches are each sized for .6
MGD with 24 hours of detention time. The plant has -two peripheral feed clarifiers each sized to
handle .6 MGD. Each clarifier's tank capacity is approximately 94,000 gallons. The return sludge
pump station has two Flygt submersible solids handling pumps with each pump sized for 1.2
MGD. The waste sludge holding tank is aerated with coarse bubble diffusers using two Aerison
positive displacement blowers. The tank has approximately 97,000 gallons of capacity. The waste
sludge pump station is sized to waste at approximately 300 gpm. The waste sludge holding tank
will store approximately 1.2 MG of decanted sludge. The waste sludge is land applied
b. The plant's disinfection system will be totally. redone. A new chlorine contact chamber will be
constructed and new dechlorination equipment will be installed. The pista grit system will be
upgraded next year to S & L's newest standards. The upgrade will include a new (to the Troy
facility) grit pumping system and a grit dewatering system. New SCADA equipment is presently
being installed at the plant. This equipment will monitor the status of the influent pump station,
the oxidation ditch rotors, the status of the sludge sweep arm and the sludge level in each clarifier.
c. See attachment.
d. See attachment.

l.ITENT P
pS GRIT REMOVAL
BoLIfiER 1.2 MGO 1.2 MGD
BOX
INFLUENT
t
B0ARSCREEN
1.5 MGO
.6 MGO .6 MGD
�a �o
O
RETURN
SLUDGE
PS
EFFLUENT
1.2 MGO
SPLITTER
BOX
.SA MOO
CHLORINE
CONTACT CLARIFIER CL'RIFICA
.6 MGD .6 MOD
2 RETURN SLUDGE
STREAM W W
"' w
AEROBIC
DIGESTER
V.S. PS "0 GPM
Sampling
Points
1.
I of 1 uent SLUDGE
(prior
to $Ede Stream) HOLDING
2.
Effluent (after chlorination) TANK
1.2 MG
3.
Oxidation Oitch
4.
Sludge to Sludge Holding Tank
i0 LNO APPLICATION
TOWN OF TROY
ACTIVATED SLUDGE/AEROBIC DIGESTION WWTP
PERMIT NO: NCO028916
Figure 1. Facility Diagram
\Facilities Diaaram.dan Sep. 10, 2000 16:18:06

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NC DENR / DWQ / NPDES PERMIT APPLICATION - STANDARD FORM A
Municipal Facilities with permitted flows > 1 MGD or with pretreatment programs
SECTION III. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section Ill for each Significant Industrial User,
1. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a flow of 50,000 gallons or more per average workday;
• has a flow greater than 5 percent of the total flow carried by the municipal system m receiving the waste, or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU Candor Hosiery, Inc
Street address 105 Poole Road
CityTroy County Montgomery
t
State NC Zip Code 27371
Telephone Number (91 0 ) 576— 565
Fax Number ( )
e-mail address
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should use the units of
measurement normally used by that industry.
Product
Raw Material
Quantity
Units
Socks
Socks
50M/dz/d
y dz
3. Flow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
.090 MGD
Intermittent ® Continuous
4of4

NC DENR / DW!g / NPDES PERMIT APPLICATION - STANDARD FORM A
Municipal Facilities with permitted flows>1 MGD or with pretreatment programs
SECTION 111. INDUSTRIAL WASTE CONTRIBUTION TO MUNICIPAL SYSTEM
Submit a separate Section 111 for each Significant Industrial User. 4t
1. Significant Industrial User (SIU)
An SIU has (or could have) significant impact on the POTW receiving the wastewater or upon the quality of effluent from the receiving POTW.
Specifically, an SIU:
• has a flow of 50,000 gallons or more per average workday;
• has a flow greater than 5 percent of the total flow carried by the municipal system m receiving the waste, or
• has a toxic material in its discharge.
It may be necessary to alter these administrative criteria in certain cases, such as an instance where two or more contributing industries in
combination can produce an undesirable effect on either the municipal facility or the quality of its effluent.
Name of SIU Capel, Inc.
Street address N. Main St./Hwy.134
City Troy County Montgomery
State N� Zip Code 27371
Telephone Number (91 0 ) 572-7000
Fax Number ( 910 ) 572-7040
e-mail address
2. Primary Product or Raw Material
Specify either the principal product or the principal raw material and the maximum quantity per day produced or consumed.
Quantities are to be reported in the units of measurement for each SIC category at the facility. SIC categories should4tse the units of
measurement normally used by that industry.
3. Flow
Indicate the volume of water discharged into the POTW and whether this discharge is intermittent or continuous
'070'_MGD
v Material
Quantit
Units
n
175/801b.
oll ea.
s
❑ Intermittent X❑ Continuous
4of4

Longterm Monitoring Plan Request Form
Facility: Troy
NPDES No: NC0028916 J�
NPDES Requestor: Bethany
Pretreatment contact: Steve Amigone
Status of Program: Modified program
5 SfU's
Permitted Flow: 0.84 MGD
Permitted SIU Flow 0.275 MGD
Domestic Flow 0.349 MGD
POC's on the LTMP are as follows:
Flow, Bod, TSS, As, Cd, Cr, Cu, CN, Pb, Hg, Mo, Ni, Se, Zn
NPDES Limited or Monitored:
Flow, Bod, TSS, NH3, Cd, Cr, Cu, CN, Pb, Ni, Zn, TP, TN
(,!ge Limited or Monitored:
Hg, Mo, Se
P°'fog I
�s
dotj
0 eo
10, p4
i�
AJEFF
J
S� L.o0s
e- - h���
Z191)
('-I I g - ZI19)

PIRF &�Plles, �/
P
tiVWT-P=> %C�®y aa11 _ LTMP Checklist:
NPDES permit AVC1 00 Z 9/0 Date: _ V/Y/9,7
or Non -Discharge permit # Reviewed by: S,r ae✓s-
1 . Influent, prior to recycle, POCs and frequency same as effluent.
2. Effluent, post chlor-dechlor?
a.) All Pollutants of Concern (POCs) and flow?
b.) Frequency (minimiwn) 4
1.) If HWA needed within 6 months and no previous LTMP data?
3 - 10 consecutive work days, then monthly, then quarterly monitoring
2.) Monthly monitoring for one'year, then quarterly
3.) Monthly monitoring again 1/year prior to HWA? Recommended.!
3. Internal to bioprocess? (NPDES systems, grab for inhibition)
a.) All Pollutants of Concern (POCs), Grab sample from aeration basin.
b.) Frequency (minimium), 1/6 months
4a. Sludge to Digester? (NPDES systems, optional, grab for anaerobic inhibition)
4b. Sludge Blanket in Lagoon? (Non -Discharge systems only)
a.) All Pollutants of Concern (POCs)
b.) Frequency - once in first year, case by case therafter
4c. Sludge to disposal, (Land Application systems)
a.) All Pollutants of Concern (POCs) and volume or flow.
b. Fr uencv (i'ninimium), specified in Sludge Permit based on tonace
Dry metric tons / year
Monitoring frequency
Dry metric tons / year
Monitoring fi-equency
0 to 290
annually
1,500 to 15,000
every 60 days
290 to 1,500
quarterly
more than 15,000
monthly
5. SIUS
a.) Pollutants limited in IUP, see IUP limits page.
b.) Frequency as specified in TUP?
c.) Recommend, have each SIU monitor for all POCs in town's LTMP 1/year,
POC Info. Pollutants of Concern (POCs) and detection levels must be included in each LTMP.
rhPnlr nr lief NPT)F_q T.imited nnllutante_ and STU limited nollutants excent organics?
POC
List
NPDES or
Non -Discharge
Pollutants
Sludge
Required
Pollutants
EPA, NC
Required
Pollutants
SIU
Limited
Pollutants
Others
may include
Detection
Levels
Recommended
Flow
Flow L
Flow
BOD
BOD L
TSS
TSS L
NH3
As
Arsenic
.010 m 1
Cd
Cadmium
Cadmium
.002 m g/l
Cr
Chromium
Chromium
1r
.005 mg/1
Cu
Copper
Copper
o
.002 m g/1
CN
Cyanide
.010 m
Pb
Lead
Lead
.010 m g/I
Hg
Mercury
.0002 m g/1
Mo
Molvbdneum
.100 mg/1
Ni
M
Nickel
Nickel
.010 mg/1
Ag
Silver
.005 m g/1
Se
Selenium
.010 mg/1
Zn
Zinc
Zinc
lr
.010 m 0
% S
% Solids
�aL
Imvortant for spray fields
Sodium
Magnesium
Calcium
Chlorides
File name: SOP1_7-MP Checklist

04
m
W
a.
c�
w
La
m
b-
v
r-
m
1
7 -''��
Lu
97.82 %
95.59 %
97.82 %
96,48 p%
95.64 7°
94.69 %
94.07 %
96.72 %
99.17 9'a
99.43 %
99.35 %
98.49 Vo
99.5 S %
99.38 %
99.64 °A
99.41 %
9 89 %
98.92'3S�
3
6.
3
edRR
96.15 %1 li A . ai
51.24 %
21
966.07 %/
:
95.36 JB
95.'84 alo
2:
95.43 %
2;
97.4.7 %
21
99.00 °!°
1.
98.75 %
l
97.92 %
�
©C
98.70 %
99.52 %
1
98.43 0`°
l�
9'8. 2-%
g8.48 ° o
II If 1
99.97 %
97.12 %
ingw
0
0.1
99.92 %
99.77%
9996%
99.80 %
99.83 %
98.92 %
99.24 °1°
99.88 %
99.91 %
9 9.91 %
99.73 %
99.86 % .
99.29 %
99.57 %
99.74 %
99.84 %
99.94 %
Column Averages => lg4
l_ -J
97.89 %
242
97,50 °b
22.06
F99.63 %
Paired Site Specific RR =>
4T. 9 °y6
'faired Site Specific RR =>
97.SU %
Paired Site Specific RR
Unpaired Sitt'Specifie RR =>
97.35 °h
Unpalred Si% Specific REEL =>
97.20 3b
UnpaiTed Site Specific RR
Default RR =>
85.UU °1°
Default R!t =>
85,{30 ga
default RR =>
a % of data is BDL
0 % of data is BDL
22 94 of data is BDL
RR for this HWA. =>
97.a8 °.6
RR fcr (Iris HWA =>
96.79 %
RR for ties HWA =>
94.82 °io
Troy HesftorkWORK %-EET IMAS
ReuxWel Rabs
Page 1da Pagn
dfM, 2:34 PM
Raw6bmn: AupW 1386

CC,
RernDval Rate Calculations
fv
Nyx
1406
ate I < II L1<1 roe- I°Yo < rrg/ < ni fL J° { in < n► L °b
11J1r9? OAI <
?.001 --i70-< 0.005 O.AQO.c{
�I ❑ ❑� QI ❑l ��❑
l llL�4 < 0.G1 L`1i G.OI �5 ❑ 1,4.000; 101mo °fo <1 2.4 70,00%
1i13fv ❑< 0A1 ©` 0.0I 0. �C ih,i001 1I'll 11 2.❑< �itjh.0{ 100.0(> °iu
11198 O,{ol O.OI Q U.2 G,{1D. 100.{!0- ❑^� 1.25�0 1.M 50.00°rc
`" It'98 = 0,01 < 0.01 1 {i.100.00°11
3}1 .M �< DA1 I<I {�.4}1 ❑; 0.?fM1 +e,000�', 10U.C10 ?o � 3 5 '❑ G.0i10 100,0Ch "e
44!4$ <0.t11 I I O.t}t © 0.40 < 0. ool,,I 101C} 14 4 1t}❑< 0.00 100,{l( IX
5111g$ t 1 Q065Qi 0,005 ❑ 0 �$ I 0,00{i!� 100.00 t� �I ?,0 ; 1.2;0 68,?5%
firll98 ©�� ❑ 0.24 O.GO{►; 100.00 o-�� Q 8,5 < O.OUJi 100,0C °i
?i1F9 I❑ fl,C103< i 0.005 ❑ 0.2,01 00{►;� 100.OIJ "o � .8 0 CI ,IC IDO,tW
S.+l,ry8 ❑ {l.{1Q5 0.U05 r❑ 0.25 G.{304! 1wxo 0.000 100,4)
9,1198
] il11198
L_I 0.005 <
O.iJGS ❑
�< 0.005 ❑
0.005 ❑<.
0.005
0. i;>S
{I.UIlS
U.0{t5
❑1 .24
❑ 0.24
❑ 0.24
® 0.60 .
0,{10U
9.00E}iII
{I.00{lf
0.000�
1U0.00
1(0,00
1 Ob.00 °foi
I &J.00 "'°
13.75
3.(2
G,
❑I
❑
(wo
0.0U0
0.000
100.0cF .7
100,{1G °1
100.06 �>'c
11!1195
12r'1/4 $
ilbf99 < 0.0{h5 4,0{t5 ® 0 =5 ❑ 0.0O0I 10?.00 °fo 18.G ❑ 0.000 100.00 nY
-�2111';+9 < 0.005 0.Dt13 � `.6.50
(''� t7.50U �_251❑ O.t�O>� I00.000/r
© ❑!___ ___ J IEII
Column averages => U.00 000
E=
I 1 co. 00 °l1
3.500 0.213
82 ?3 S'a
Paired Site Specific RR ->
>50 °ro D Paired Site Specific RR =>
Paired Site'Specific RR
Unpaired Site Specifie RR ->
> 50r DDL Unpaired Site Specific RR =>
84.05 9d
Unpaired Site Specific RR
Default RR ->
1 45.00 Mu Degault RR =>
6 r.0b °0
1?efWt RR =>
l00 °Jo of data is BDL
36 1/° cif data is BDL
36 %cif data isBDL
RR for this }3-AA ->
FF 45.0( °5 RR for thiq UWA
RR for this HIVA =>
S7 )U °b
Troy Headwork WORK SHEET t9Bg.xis - -
Removal Rates
Page 2of a pages
4140, 8:5SPM
T ev'istm: kNua( 9DDE

0
4?
r,
a
a
ke)
W
L)
u
a
In
IE
ICalll+l&
I�T 1l.'1+9F
12.f U98
Ill, 99
211199
F
Column Ave-riges =>
69,5;--
21.500
39, S
17.000
Q
34.50
56.50
5.OW
©
2^,0U �,
40.(0
9,50iM
13A00
76.(K0
23.00
8#.50
30.50
[j I64A �
36.DU
Removal Rate Calculations
I <1 m
11 0,01 <�
< i 0.01
94.34 %
69.06 °la
69.M%
0.24 <='
56.96 ors
[�,
Cr.24_ < 1
56,52 Lo
�;
G,24 L3
5
73.45 Mo
E]=
56.92. %
A10-1
67.50- 11P
2.75 <�--�
69.74 o.a
63.511 %�t_
�u4
.
78.05 %
[j J.SO L
c
60.91 ° o
❑ 2.6D G
71.U8 rYo
1.2t1
i]
79.80 t/if
I 1.20
{J
54.41 4U ILI 1.201-1_ i1
OA
o fD
I t LIN MO
I OOM NO
100.00 P,"
100.00 °'o
100.0E °rig
103.00 : U
10J.00 °o
90,32 °n
57.14 MD
I0D.U) °ro
iolco uu
10).00 l
100K °D
1(},r,0C3 °lD
112
II D0325[]
0.01
Q1 0.01
q�-0.61
DE
Ell 32.5019
2.40
x.4{y
fl,tico
2.40'
< fl.iaGO
Offl
94.62 'A
0.00 %
100.00 NO.
100,00 `$
100,t'r0 °rn
100.0D 9b
100.00 °
100,00 %
100.0D �`U
34.17°rf°
68.?5 %
100.N
100.Oti °lo
10G.Qt1 `r'o
100.00 n o
100.00 o 0
100.00 °
96.291
16.�14
71.46 °ln
1.56 U.l 1
8i.27 °�0
6.03
G,.23
$431 °l
Paired Site Specific RR =>
71.46 °lD
Paired Site Specific RR. _>
84.22 gG
Paired Site Spcoinc RR
Unpaired. Site Specific RR=>
82.95 Y'o
Unpaired Site Specific RR =>
92.95 °io
Unpaired Site Speciflc RR =>
96AO %
Defaali RR=>
86,00 °n
DefauII RR
69.00 n
Default RR =>
61,OD %
0 'ri, of data is BDL
36 % of data is BDL
33 % of data is BDL
RR for this HAVA =>
SI.70 °ro
RR for thi s FIA =>
RR for b�is 14{tr1' =>
61 4U Y
Troy P*Mwo*'MORK SH EET I OBg.xft o
Remeuat Rates
Page 3 of 8 pages
410M 6,55PN
Ravlslor: Augus: I969

n
T
C.
Removal Bate Calculations
5
°ro
11r1l47I U[ 0.0D02 11 0,0002
data F 01 10
t 11119 11 0. 021L]L rT55 S2 0,04 1/0
12�1,19 �<I o.tk*. nl D.{J04►2
If P981 U 0.401}2 J D.{�at12
2l1.�9$ � CI.Da02 ❑ D.{►042
311/98 Q 0,000" ❑I O.OD02
�11" E 0,0oo2 ❑ 0.0302
G,040 <
7? I,`. S O.t)0{►3 � U.CI]G2 E6,87 : o
8A/9 ❑ U.0003 < O.0002 66.67 0/0
911191 ❑ 0.00031< G.C}3t}2 66.67°o
10 1),98 � < 0.0002 rJ G.4092
1113E981❑ C1_ptJ02❑ Q.a�O' 4.Oi► °f°
121i981 ❑ a.(}0l 1 El G.000}? 9U.91 °r0
11
1r1/94
99 1).(1{313 < I t7.UC►U 93.33 b
®
o.512 ©�
071
M
❑
4.a12 D�
').G12.
❑
O.U09Ell
100
D'
4.U41; 1
❑
4.U46 ❑
0.008
❑
a.U23
0.013
0.030
0.025
I❑�
❑I �0.043
0.043
❑ G,04i �
0.GS4
❑ 0,01{1 ❑
o-01
❑ U,U72 ❑
0.01
❑
{l.OaR ❑
9.G1 f
❑
0,015❑
O,OL❑
9.01`�
9AU8
{7.033 ❑�
�J.pl
°%
m 11 < mrL I
OA
79.17 %
a,OI
0.00 40
❑ 0.0 1 < a.01
100.{f0 qr
lflil oo %
1{mir,,m %
10o.00 %
0.011
D1 .4 ❑ U,Op[7
o.W ° o
❑ 0:2 0.{'it1)
fiR.7S %
❑1 2A 0,0Co
0.00%
43.49 � o
D 2.4 � ; 0.0(K]
16.67 C4
.� .
2.41 < 0d100
100,00%
❑!
2.4 U.00J
I0C"00 9n
0.0(10
IOC',00 U
100.{l�� �f.
0. Uu
2.4 O.flOo
❑
5.5 D 0.000
100.00
DI
2.401 1 j 0.000
100.00
7b.34 °o
2.4
2.4
0.{)lK1
wom °S
100 00 9$
a.flUO
MOD
2.4
0.000
33.33 °%
❑
�{�
2.4
2,
i�
IWW
0.0p0
100.{i0 °lo
G?.42 Rio
lOG.Oo "o
Cc4u 111 Averages =>
0.00D2
;1.1'4U l
54. R9 °o
G.0
) ((►
Paired Sitc Specific Rid =>
>5U °o BDL
Paired Site Specific RR ->
29.25 pro
Nircd Site Specific RR ~>
IOG.flO g,P
Unpaired Site Specific RR =>
> 50 o D Unpairc-d Site Specific RR =>
2.2:
Unpeirod Site epecifte RR
Default RR =>
60.00 °,o
Mfauh RR =>
33.oa 9ro
default RR =>
4100 %
74 °Jo ofdata is BDL
6 °.5 of data is BDL
38 % of data is BDL
RR for this IMA =>
b0.04 °Jo
RR for this IIWA ->
RR fo: (his HWA =>
42OG i
Troy Headwork WORK SHEET 19439.x1s
Removal Rates
Pags 4 of 6 pages
41", 8:5$ PFA
Revwrn: August t966

Removal bate Calculations ,O
�
V",� 1�;"► ]
kT! `
Fffi
=Sam Ie Date m < m * !. ° b < rnIL < m C1, % < L < m 4- 90
ILI-_---�-~--�-----��❑, D
I UU1 ID�D�_____J !< 0.01 6UI a,012 0,001 79.17 %
DIviR ci2ftt 11/1f97 DF !___ J ❑< (1,0110 0 01 ' 2.011',© 00.00 % �
1211?97 � < G.01 0.) I :0.50! O.OU IM.N 0/1LI-SS D I 0.01 0.01 1.24� <❑ 0.0{i" 1 100.0U °rb
er r,9a ❑ D.01 ] o.e1� ❑ 6.50!© n.K
3+ . r 5S ❑�❑ _ t1.01 0.011 9.f111'%
.4PIG8 D�__��� n< ti.0l CI.01 ❑ R.OfI;EEO 100.0D 04
:,'9 <
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ReffWal Rates
FOOD ?of 8 pages
409, ROM
Re+da m: August t DW

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
Gray Walls
Town of Troy
444 North Main Street
Troy , NC 27371
Dear Permittee:
NC DENR
September 21, 1998
Subject: Status of NPDES Permit NCO028916
Troy WWTP
Montgomery County
After a thorough review of the Yadkin -Pee Dee River basin management plan and water quality issues relevant to
the subject facility, the Division of Water Quality has decided to extend the duration of the subject permit. The
expiration date of your permit will be changed in order to allow the Division to review all NPDES discharge
permits in the Yadkin River Basin during calendar year 1999.
All terms and conditions in the existing permit will apply until a new expiration date is assigned by the Division.
Extension of existing Effluent Limitations and Monitoring Requirements does not exempt the subject facility from
the new Enforcement Policy recently enacted by the Division.
Attached to this letter is a copy of the Public Notice that is being published to announce the planned extension of
your permit. After Public Notice has been made by the Division, the expiration date of your permit will be changed
via a permit modification. No draft permit will be sent out with the Public Notice, as none of the conditions in the
existing permit will be modified.
If you have already submitted your renewal application package, no additional fees or documentation will be
required as a result of this change to your permit's expiration date. If the Division has not yet received a renewal
application for the subject permit, you will find the necessary application form(s) attached to this letter.
The Division appreciates your patience and understanding to date regarding the rescheduling of the subject
permit. If you have questions about this proposed modification or about the permit renewal process, contact
Charles Weaver of my staff at the telephone number or address listed below.
Sincerely,
A. Preston o d, Jr., P.E.
cc: Central Files
Fayetteville Regional Office, Water Quality Section
NPDES File
P.O. Box 29535, Raleigh, North Carolina 27626-0535 919 733-5083, extension 511 (fax) 919 733-0719
An Equal Opportunity Affirmative Action Employer [e-mail]

Notice of Intent
To Extend the Duration of NPDES Discharge Permits in the Yadkin River basin
SUBJECT: The Division of Water Quality plans to extend the duration of the current NPDES Permits
for the following facilities:
Permit Facility
NCO028916 Troy WWTP
NCO021504 Biscoe WWTP
County
Montgomery
Montgomery
PURPOSE: The facilities listed above all discharge into the Yadkin River basin. Other permits in the
Yadkin River basin have expiration dates in calendar year 1999. The facilities listed above
have permit expiration dates in 1998. In order for the Division to evaluate all permit
renewal requests in the Yadkin River basin during the same calendar year, the Division
plans to extend the expiration dates of the permits for the facilities listed above.
No conditions in the existing permits will be changed or modified. This is an
administrative change to better align permitting and Basinwide Planning operations
within the Division of Water Quality.
On the basis of preliminary staff review of Article 21 of Chapter 143, General Statutes of
North Carolina (and other lawful standards and regulations), the North Carolina
Environmental Management Commission proposes to extend the duration of the NPDES
permits listed above, subject to specific pollutant limitations and special conditions.
INFORMATION: A copy of the existing NPDES permits and a sketch showing the location of each
discharge is available by writing or calling:
Mr. Charles Weaver
NC DENR - DWQ - NPDES Unit
P.O. Box 29535
Raleigh, North Carolina 27626-0535
Telephone number: [phone], ext. 511
The existing permits are on file at the Division of Water Quality, Archdale Building, 512 North
Salisbury Street (Room 925), Raleigh, North Carolina. They may be inspected during normal office
hours. Copies of the information on file are available upon request and payment of the costs of
reproduction.
Date
A. Preston Howard, Jr. .E., Director
Division of Water Quality
Page 1 of 1