NC0023884_Permit Issuance_20141031

��
NCDEN
North Carolina Department of Environment and Natural Resources
Pat McCrory
Governor
October 31, 2014
Sonja Basinger
Environmental Services Manager
City of Salisbury
1915 Grubb Ferry Rd.
Salisbury, North Carolina 28144
Subject: Issuance of NPDES Permit
Permit NCO023884
City of Salisbury WWTP
Rowan County
Facility Class IV
Dear Ms. Basinger:
John E. Skvarla, III
Secretary
Division personnel have reviewed and approved your application for a renewal of the subject
permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued
pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the U.S. Environmental Protection Agency dated October
15, 2007 (or as subsequently amended).
The following changes have been incorporated into this renewal:
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.
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 the permit. [See Special Condition A. (8.)].
• Monitoring for Total Silver and Total Copper was removed from the permit based on the
results of the statistical analyses of the effluent data.
• Based on the Permitting Guidelines for Statewide Mercury TMDL, the Mercury ini ation
Plan special condition will be added to the permit (Please see A. (9)).
• Nutrient Reopener for High Rock Lake was added to the permit (Please see A. (10.)).
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] Internet: www.ncwaterquality.org
An Equal opportunity %Affirmative Action Employer — Made in part by recycled paper

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 permits required by the Division of Land Resources, the Coastal Area Management Act
or any other Federal or Local governmental permit that may be required. If you have any questions
concerning this permit, please contact Sergei Chernikov at telephone number [phone].
Sincerely,
(lot, k'.
Thomas A. Reeder
!Director, Division of Water Resources
cc: Central Files
NPDES Files
Mooresville Regional Office / Water Quality
EPA Region IV (e-copy)
WSS/Aquatic Toxicology Unit (e-copy)
WSS (Carrie Ruhlman and Steve Kroeger (e-copy))
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Phone: [phone] Internet: www.ncwaterquality.org
An Equal Opportunity 1 Affirmative Action Employer - Made in part by recycled paper

Permit NCO023884
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 provision of North Carolina General Statute 143-215.1, other lawful standards and regulations
promulgated and adopted by the North Carolina Environmental Management Commission, and the Federal Water
Pollution Control Act, as amended, the
City of Salisbury
is hereby authorized to discharge wastewater from the facilities located at the
City of Salisbury WWTP
1915 Grubb Ferry Road
Salisbury
Rowan County
and
850 Heiligtown Road
East Spencer
Rowan County
to receiving waters designated as the Yadkin River in the Yadkin -Pee Dee River Basin in accordance with
effluent limitations, monitoring requirements, and other applicable conditions set forth in Parts I, II, III,
and IV hereof.
The permit shall become effective
December 1, 2014.
This permit and the authorization to discharge shall expire at midnight on June 30, 2019.
Signed this day October 31, 2014.
&e, omas A. Reeder, Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 12

Permit NCO023884
SUPPLEMENT TO PERMIT COVER SHEET
The City of Salisbury is hereby authorized to:
1. Continue to operate and maintain the existing 7.5 MGD Grant Creek Wastewater Treatment Train
consisting of
➢ Influent Parshall flume
➢ Four mechanical bar screens
➢ Four grit chambers
➢ Aeration basin with mechanical floating aerators and mixers
➢ Two circular clarifiers and two rectangular clarifiers
➢ Four primary clarifiers
➢ Two trickling filters
➢ Screw pump lift station
➢ Four aerobic digesters
➢ Chlorine contact basin with liquid chlorine disinfection
➢ Belt filter press
➢ Standby power generator
➢ Effluent pump station
➢ Flow measurement instrumentation
This treatment train is located on Grubb Ferry Road near Spencer in Rowan County.
2. Continue to operate and maintain the existing 5.0 MGD Town Creek Wastewater Treatment Train
consisting of:
➢ Two mechanical bar screens
➢ Two grit and grease removal units
➢ Two aeration basins with fixed mechanical aerators and mixers
➢ Two secondary clarifiers
➢ Screw pump lift station
➢ Two aerobic digesters
➢ Standby power generator
➢ Flow measurement
➢ Belt filter press
➢ Effluent pump station
➢ Liquid dechlorination system for the combined effluent
This treatment train is located on Heiligtown Road near East Spencer in Rowan County.
3. Continue to operate and maintain a dechlorination system (as primary) and ultraviolet system (as
secondary), cascade post aerator, Parshall flume, effluent sampling station, standby power generator and
diffuser at the Yadkin River Wastewater Treatment Train.
4. After receiving an Authorization to Construct from the Division, construct and operate a 20.0 MGD
wastewater treatment system.
5. Discharge from the City of Salisbury WWTP at the location specified on the attached snap via outfall
001 into the Yadkin River, currently classified WS-V waters in the Yadkin -Pee Dee River Basin.•
Page 2 of 12

Permit NCO023884
Part I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (12.5 MGD)
During the period beginning on the effective date of the permit and lasting until expansion beyond 12.5 MGD, the
Permittee is authorized to discharge from Outfall 001. Such discharges shall be limited and monitored$ by the
Permittee as st)ecified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS '
Monthly
Average.
Weekly
Average
Daily
Maximum
Measurement
Frequency _
' Sample
Type
Sample.
L'ocationl _
Flow
12.5 MGD7
Continuous
Recording
Influent or
Effluent
BOD, 5 day, 20 °C
(April 1 to October 31)
15.0 mg/L6
22.5 mg/L
2/Week
Composite
Influent &
Effluent
BOD, 5 day, 20 °C
(November 1 to March 31)
30.0 mg/L6
45.0 mg/L
2/Week
Composite
Influent &
Effluent
Total Suspended Solids
30.0 mg/L6
45.0 mg/L
2/Week
Composite
Influent &
Effluent
NH3 as N
(A ril 1 to October 31)
6.0 mg/L
18.0 mg/L
2/Week
Composite
Effluent
NH3 as N
(November 1 to March 31)
12.0 mg/L
35.0 mg/L
2/Week
Composite
Effluent
Dissolved O en2
Daily
Grab
Effluent
Fecal Coliform
(geometric mean
200/100 mL
400/100 mL
Daily.
Grab
Effluent
Temperature
Daily
Grab
Effluent
H3
Daily
Grab
Effluent
Total Residual Chlorine¢
28 µ /L
Daily
Grab
Effluent
Total Nitrogen
(NO2 + NO3 + TKN)
Weekly
Composite
Effluent
Total Phos horns
Weekly
Composite
Effluent
Chronic Toxici 5
Quarterly
Composite
Efflue:]
Notes:
1. Effluent sampling location is after the Yadkin River Wastewater Treatment Train, except that flow, BOD and
TSS removal efficiency shall be calculated by mathematically aggregating the values for the Grant Creek and the
Town Creek Wastewater Treatment Trains. (Refer to A. (6.).)
2. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L.
3. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
4. Monitoring only applies if chlorine is added to the treatment system. Facility shall report all effluent TRC values
reported by a NC certified laboratory including field certified. However, effluent values below 50 µg/L will be
treated as zero for compliance purposes.
5. Chronic Toxicity limit (Ceriodaphnia) at 5.3 % with testing in March, June, September and December (see A. (4)).
6. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85 % removal).
7. 7.5 MGD at Grant Creek treatment train. 5.0 MGD at Town Creek treatment train.
8. 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. (8.).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 3 of 12

Permit NCO023884
r
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (20 MGD)
During the period beginning after expansion beyond 12.5 MGD and lasting until expiration, the Permittee is
authorized to discharge from Outfall 001. Such discharges shall be limited and monitored7 by the Permittee as
specified below:
EFFLUENT'.
CHARACTERISTICS
EFFLUENT LIMITATIONS
• MONITORING REQUIREMENTS.
m6iithly
Average
I Weekly • 1
I Average
. llaily,
I'Maximum
1 e-a"surement
;. Frequency
, Sample-
Sample L'ocattonl'
Flow
20.0 MGD
Continuous
Recording
Effluent
.BOD, 5 day, 20 °C
(April 1 to October 31
5.0 mg/L6
7.5 mg/L
Daily
Composite
Influent and Effluent
BOD, 5 day, 20 °C
(November 1 to March 31)
10.0 mg/L6
15.0 mg/L
Daily
Composite
Influent and Effluent
Total Suspended Solids
30.0 mg/L6
45.0 mg/L
Daily
Composite
Influent and Effluent
NH3 as.N
(April 1 to October 31
1.0 mg/L
3.0 mg/L
Daily
Composite
Effluent
NH3 as N
(November 1 to March 31)
2.0 mg/L
6.0 mg/L
Daily
Composite
Effluent
Dissolved Oxygen2
Daily
Grab
Effluent
Fecal Coliform
(geometric mean)
200/100 mL
400/100 mL
Daily
Grab
Effluent
Temperature
Daily
Grab
Effluent
pH3
Daily
Grab
Effluent
Total Residual Chloflne4
28 µg/L
Daily
Grab
Effluent
Total Nitrogen
(NO2 + NO3 + TKN)
Weekly
-composite
Effluent
Total Phosphorus
Weekly
Composite
Effluent
Chronic Toxicity5
Quarterly
Composite
Effluent
Notes:
1. Effluent sampling location is after the Yadkin River Wastewater Treatment Train, except that flow, BOD and
TSS removal efficiency shall be calculated by mathematically aggregating the values for the Grant Creek and the
Town Creek Wastewater Treatment Trains. (Refer to A. (6.).)
2. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/L.
3. The pH shall not be less than 6.0 standard units not greater than 9.0 standard units.
4. Monitoring only applies if chlorine is added to the'treatment system for disinfection. Facility shall report all
effluent TRC values reported by a NC certified laboratory including field certified. However, effluent values
below 50 µg/L will be treated as zero for compliance purposes.
5. Chronic Toxicity limit (Ceriodaphnia) at 4.0 % with tests in March, June, September and December (see A. (5)):
6. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85 % removal).
7. 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. (8.).
There shall be no discharge of floating solids or visible foam in other than trace amounts
Page 4 of 12

Permit NCO023884
A. (3.) INSTREAM MONITORING REQUIREMENTS:
CHARACTERISTICS
MQL\IITURING.
easu_rement Fre_ ;uenc :
_Sam le T, `e
; ; Sam Ie.Locatiorr,_
Dissolved Oxygen
June -September
3%week
Grab • _
Upstream & Downstream
October -Ma
1/week
pH
June -September
3/week
Grab
Upstream & Downstream
October -Ma
1/week
Temperature
June -September
3/week
Grab
Upstream & Downstream
October -Ma
1/week
Total Phosphorus
June -September
1/month
Grab
Upstream & Downstream
NO2,NO3
June -September
1/month
Grab
Upstream & Downstream
NH3 as N
June -September
1/month
Grab
Upstream & Downstream
Total Kjeldahl Nitrogen
June -September
1/month
Grab
Upstream & Downstream
Chlorophyll -a
June -September
1/month
Grab
Downstream
Notes:
Upstream =.at least 200 feet upstream of the discharge point
Downstream = 0.7 miles above Southern Railroad Bridge.
As a participant in the Yadkin Pee -Dee River Basin Association, the instream monitoring requirements as stated
above are waived. Should your membership in the agreement be terminated, you shall notify the Division
immediately and the instream monitoring requirements specified in your permit shall be reinstated.
As per 15A NCAC 2B.0505 (c) (4), stream sampling may be discontinued at such time as flow conditions -in the
receiving waters or extreme weather conditions will result in a substantial risk of injury or death to persons collecting
samples. In such cases, on each day that sampling is discontinued, written justification for the discontinuance shall be
specified in the monitoring report for the month in which the event occurred. This provision shall be strictly
construed and may not be utilized to avoid the requirements of 15A NCAC 2B.0500 when performance of these
requirements is attainable. When sampling is discontinued pursuant to this provision, stream sampling shall be
resumed at the first opportunity after the risk period has ended.
Page 5 of 12

Permit NCO023884
A. (4.) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) at 12.5 MGD
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 5.3 %.
The pen -nit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions. The tests will be performed during the months of March, June, September, and December. 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 TFIP3B for the Chronic Value. Additionally, DWR Form AT-3 (original) is to be sent to the
following address:
Attention: NC DENR / DWR / Water Sciences Section
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.
Tofal 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 Resources indicate potential impacts to the receiving stream, this permit may be
re -opened and modified . to include alternate monitoring requirements or limits. If the Permittee monitors any
pollutant more frequently then required by this permit, the results of such monitoring shall be included in the
calculation & reporting of the data submitted on the DMR & all AT Forms submitted.
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 willrequite immediate follow-up testing to be completed no later than the last day of the month following the
month of the initial monitoring.
Page 6of12

Permit NCO023884
A. (5.) CHRONIC TOXICITY PERMIT LIMIT (Quarterly) at 20 MGD
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 4 %.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the "North
Carolina.Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised February 1998, or subsequent versions or
"North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent
versions. The tests will be performed during the months of March, June, September, and December. 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 H 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, DWR Form AT-3 (original) is to be sent to the
following address:
Attention: NC DENR / DWR / Water Sciences Section
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 Resources indicate potential impacts to the receiving stream, this permit may be
re -opened and modified to include alternate monitoring requirements or limits. If the Permittee monitors any
pollutant more frequently then required by this permit, the results of such monitoring shall be included in the
calculation & reporting of the data submitted on the DMR & all AT Forms submitted.
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.
Page 7of12

Permit NC0023884
A. (6.) AGGREGATE CALCULATION OF GRANTS CREEK AND TOWN CREEK TSS AND
BOD REMOVAL EFFICIENCY
TSS V/WI'p InIl ( S`SGC Infl x F1owG� + (TSSTC Infl x F1owT�
F1owGc + Flowzc
TSS WWTPEffl ( SSGCEffl x F1owG� + (TSSTCEffl x F1owr�
F1owGc + F1owTc
TSSREmovAL _ [1 - (TSSwwrP Effl / TSSwwrp Infl)] x 100%
Notes:
"Effl" = Effluent
"Infl" = Influent
"GC" = Giant Creek Wastewater Treatment Tiain
"TC" = Town Creek Wastewater Treatment Train
"WWTP" = City of Salisbury WWTP
Page 8 of 12

Permit NCO023884
A. (7.) EFFLUENT POLLUTANT SCAN
The Perm_ittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below. O'n'e scan must
be peforsnedin each, of the:,following`years,. �015 2016 and 2017 Analytical methods shall be in accordance withT40
. _
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
Chloro dibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Reporting. Test results shall be rep
December 3PS of each designated sa
/ DWR / Central Files,1617 Mail
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloro ethane
Tetrachloroethylene
Toluene
1,1,1-trichloro ethane
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
1,1,2-trichloroethane
1,3-dichlorobenzene
Trichloroethylene
1,4-dichlorobenzene
Vinyl chloride
3,3-dichlorobenzidine
Acid -extractable compound Diethyl phthalate
P-chloro-m-cresol
Dimethyl phthalate
2-chlorophenol
2,4-dinitrotoluene
2,4-dichlorophenol
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
Acehaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
Bis (2-chloroethoxy) methane
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachloro cyclo-p entadiene
Hexachloroethane
Indeno (1,2,3-cd)pyrene
Isophorone
.Naphthalene
Nitrobenzene
N-nitros o di-n-propylamine
N-nitro s o dimethylamin e
N-nitros o diphenylamine
Phenanthrene
Pyrene ,
1,2,44-trichlorob enzene
on DWQ Form -A MR-PPA1 (or in a form approved by the Director) by
g year. The report shall be submitted to the following address: NC DENR
ce Center, Raleigh, North Carolina 27699-1617.
Page 9 of 12

Permit NCO023884
Additional Toxicity TestingRequirements 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 fourtests
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
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
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. (8.) ELECTRONIC REPORTING OF DISCHARGE MONITORING REPORTS
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 II of this
perinit (Standard Conditions for1VPDES 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)]
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 requited 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:
NC DENR / DWR / Information Processing Unit
ATTENTION: Central Files / eDMR
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Page 10of12

Permit NC0023884
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 bL 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:
hM://pottal.ncdent.org/-Web/wq/adtnin/bog/­ipu/edrnr
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.)(dl�
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (11.) (a) or by a duly authorized representative of that person as described in Part II, 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://12oi:tal.ncdenr.org/web/wq/adniin/­­bog/ij2u/edrnt
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:
"I certij, 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 qual f ed personnel properly gather and evaluate the infwwation submitted.
Based on my inquiry of the person orpersons who manage the ystem, or those persons directly reponsible forgathering 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 submitting false information, including the possibility of fines and imprisonment for
knowing violations. "
Page 11 of 12

Permit NC0023884
3. Records Retention (Supplements Section D. (6.)]
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].
A. (9.) MERCURY MINIMIZATION PLAN (MMP)
The permittee shall develop and implement a mercury minimization plan during this permit term. The
MMP shall be developed within 180 days of the NPDES Permit Effective Date, and shall be available for
inspection on -site. A sample MMP was developed through a stakeholder review process and has been
placed on the Division website for guidance (hitp://12ortal.ncdenr.org/web/­­wq/§MT/ps/npdes.., under
Model Mercury Minimization Plan). The MMP should place emphasis on identification of mercury
contributors and goals for reduction. Results shall be summarized and submitted with the next permit
renewal.
A. (10.) NUTRIENT REOPENER FOR HIGH ROCK LAKE
This permit may be reopened and modified to implement nutrient requirements in accordance with any
future TMDL and/or nutrient management strategy for High Rock Lake.
Page 12 of 12

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City of Salisbury WWTP
State Gridguad: E17LNW/salisbtuy LalitAm
35° 43' 37" N
Lm t !k
800 25' 28 "W
gpoovWg Stream YadlanRiver DrainageBaslu
Yam -
strmmclasm ws-v Sufi -Bade:
03-07-04
Fadlity Lacatim
not to scale
NMES Permit No. NC0023884
North Rowan Comity'

NC ENVIRONMENTAL MGMT COMMISSION
1617 MAIL SERVICE CENTER
RALEIGH NC 27699
Salisbury Posh
AFFIDAVIT OF PUBLICATION
NORTH CAROLINA
ROWAN COUNTY
Before the undersigned a Notary Public of said county and state, duly commissioned, qualified, and
authorized by law to administer oaths, personally appeared WINFRED MENTION, who being first
duly sworn, deposes and says that he is ASSISTANT ADVERTISING DIRECTOR of the SALISBURY
POST, published, issued and entered as second class mail
in the City of Salisbury, in said County and State, that he is authorized to make this affidavit
and sworn statement, that the notice or other legal advertisement a true copy
of which is aftached hereto, was published in the SALISBURY POST, on the
following dates:
07/22/14 Tue SP
07/22/14 Tue SPW
and that the said newspaper in which such notice, paper document or legal advertisement was
published, at the time of each and every such publication, a newspaper meeting all the requirements
and qualifications of Section 1-597 of the General Statues of North Carolina and was a qualified
newspaper within the meaning of Section 1-597 of the General Statues of North Carolina.
at a cost of $70.14
Account# 329836
NO. 1189418 No. 1189418 PUB
P.O. Number:
(signature of person making affidavit)
Sworn and subscribed before me
This O� ay of A.D. 3014
NOTAR UBLIC _
My Commission Expires
Page 1

Salisbury Post
131 West Innes Street, Salisbury, NC 28144
Printed on: 07/22/14
Account:
329836
Name:
Company:
NC ENVIRONMENTAL MGMT COMMISSION
Address:
1617 MAIL SERVICE CENTER
RALEIGH NC 27699
Telephone:
[phone]
Publication Start Stop Inserts Total Cost
Salisbury Post 07/22/14 07/22/14 1 $70.14
Salisbury Post Web 07/22/14 07/22/14 1
07/22/14 Tue SP
07/22/14 Tue SPW
No.1189418
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 com-
ments regarding the proposed permit will be accepted until 30 days after the pub-
lish 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: httpl/portal.nodenr.org/web/wq/swp/ps/npdes/cal-
endar, or by calling [phone]. City of Salisbury has requested renewal of
permit NCO023884 for City of Salisbury WWTP in Rowan County; this facility dis-
charge is treated municipal wastewater to Yadkin River, Yadkin River Basin.
Ad ID:
1189418
Text:
No.1189418 PUBLIC NOTICE North Caro
PO:
Run Dates:
07/2212014 to 07/22/2014
Inserts:
2
Class:
20510
Orig User:
SANDREWS
Lines:
57.0
Ad Note:
Customer Note:

May 21, 2014
Certified Mail 70101670 00012766 0220
Return Receipt Requested
Mr. Sergei Chernikov, Ph.D.
DENR/ Division of Water Resources
NPDES Unit -West
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Re: Comments on Draft NPDES Permit
City of Salisbury WWTP
NPDES Permit No. NCO023884
Rowan County
Dear Mr. Chernikov,
RECEIVED/DENR/DWR
MAY 2 8 2014
Water Resources
Permitting Section
The City of Salisbury submits the following comments on the subject draft permit received
on April 29, 2014:
Supplement to Permit Cover Sheet:
• # 1. Remove the "s" from Grants (the correct spelling for the treatment train is
"Grant").
• # 2. Add "Wastewater"to the Town Creek Treatment Train (italicized term is
missing in the draft).
O# 2. Remove liquid dechlorination system for the combined effluent from the Town
Creek Wastewater Treatment Units (the dechlorination system is located at the
Yadkin River Wastewater Treatment Train).
• # 3. Add "Wastewater"to the Yadkin River Treatment Train (italicized term is
a
missing in the draft).
• # 5. Replace "Salisbury -Rowan WWTP" with "City of Salisbury WWTP" (draft states
Salisbury -Rowan WWTP).
1 Water Street Telephone [phone]
Salisbury, NC 28144 Fax [phone]

Mr. Sergei Chernikov
May 21, 2014
Page Two
Part I. A.(1) Effluent Limitations and Monitoring Requirements (12.5 MGD
0"2/Week"
Replace "daily" monitoring requirement for the Fecal Coliform parameter to (On March 26, 2013, DENR approved the reduction in monitoring to
2/Week for the BOD, TSS, NH3-N and Fecal Coliform parameters).
Please clarify the Footnote 1 in Part I. A. (1) and Part I. A. (2) below:
• The heading "Sample Location" at Part I. A. (1) refers to both influent and effluent,
but the footnote only applies to effluent
• It appears that the phrase "Combined effluent from the Grant Creek and Town
Creek treatment trains, and after all treatment processes" should be replaced with
"after Yadkin River Wastewater Treatment Train".
Note: A suggestion to correct the two items above would be to change the text to
"Effluent sampling location is after the Yadkin River Wastewater Treatment Train,
except that flow, BOD and TSS removal efficiency shall be calculated by mathematically
aggregating the values for the Grant Creek and the Town Creek Wastewater treatment
Trains (refer to A.(6))".
Whatever corrections are made above should also be made to Part I. A. (2). Also note
that the footnote in Part I. A. (2) refers to the letter "E" which does not appear in the
body of the table.
A. (6) Aggregate Calculation of Grant and Town Creek TSS and BOD Removal Efficiency
• Correct spelling error on the TSS GC Influent calculation (draft states TSS GC "Iinfl").
• In the notes section, remove the "s" from Grants (the correct spelling for the
treatment train is "Grant").
• In the notes section, replace "Salisbury -Rowan WWTP" with "City of Salisbury
WWTP" (draft states Salisbury -Rowan WWTP).
Facility Mai
The latitude and longitude in the legend is incorrect. The correct latitude is 35° 43' 37.84" N,
and longitude is 80' 25' 28.37" W.

Mr. Sergei Chernikov
May 21, 2014
Page Three
Please contact me at [phone] or email [e-mail] if you require any
clarification or additional information regarding the subject draft permit
Sincerely,
1
Sonja asinger
Environmental Services Manager
cc: Doug Paris, City Manager, City of Salisbury
F. Rivers Lawther, Jr., Attorney, City of Salisbury
Jim Behmer, Utilities Director, Salisbury -Rowan Utilities
Martin Trexler, Plants Manager, Salisbury -Rowan Utilities
Michael Parker, Regional Supervisor, DENR/DWR/MRO

April 22, 2014
MEMORANDUM
To: Britt Setter, Regional Engineer
NC DENR / DWR / Public Water Supply Section
Mooresville Regional Office
From: Sergei Chernikov, Environmental Engineer II, Complex NPDES Unit,
Division of Water Resources (fax-919-807-6495)
Subject: Review of the discharge locations for the following Draft NPDES permits:
NCO023884 City of Salisbury WWTP
Rowan County
Please indicate below by May 22, 2014 your agency's position or viewpoint on the facility
listed above. We cannot issue the permit without your concurrence. Please return this form
at your earliest convenience. ;
iNe sa "lTi�e Geiy.a eyf 4+-e .
,,,.v, •�.`-�.,, ""�L2 i�..'E`a �
RESPONSE: 3 �fi t ��,,.,� e^c! �. ,�r, lr CcA-I .
c Imo ` w� i R- W sxt) fW %rh-e+J s*i�ty-e-- pia
This agency has reviewed the draft permit and determined that -the proposed"ss�s
discharge will not be sufficiently close to any existing or known proposed 4*
public water supply intake so as to create an adverse effect on water quality. Yese.p� q-P.
We concur with the issuance of this permit provided the facility is operated
and maintained properly, the stated effluent limits are met prior to discharge,
and the discharge does not contravene the designated water quality standards.
Signed,
cc: file
Concurs with issuance of the above permit, provided the following conditions
are met:
Opposes the issuance of the above permit, based on reasons stated below, or
attached:
Date: �111-f-

Fact Sheet - NPDES Permit
City of Salisbury WWTP
NPDES No. NC0023884
Fa`'Cllltu
Red'eiuind,Ztream
Facility Name:
City of Salisbury WWTP
Receiving Stream:
Yadkin River
Permitted Flow (MGD):
12.5 MGD
Subbasin:
030704
Facility Class:
IV
Index No.:
Facility Status:
Existing
Stream Class:
WS-V
Permit Status:
Renewal
303(d) Listed:
No
County:
Rowan
Use Support:
Regional Office:
Mooresville
Drainage Area (mi2):
3,377
USGS Topo Quad:
E17NW
Summer 7Q10 (cfs)
735 cfs
Salisbury, NC
Effective 7Q10
348 cfs (based on 18.9:1
dilution instream)
Average Flow (cfs):
4,879
IwC
5.28
Facilit
.r
Receiumg' Stream
Facility Name:
City of Salisbury WWTP
Receiving Stream:
Yadkin River
Permitted Flow (MGD):
20.0 MGD
Subbasin:
030704
Facility Class:
IV
Index No.:
Facility Status:
Existing
Stream Class:
WS-V
Permit Status:
Renewal
303(d) Listed:
No
County:
Rowan
Use support:
Regional Office:
Mooresville
Drainage Area (m12):
3,377
USGS Topo Quad:
E17NW
Summer 7Q10 (cfs)
735 cfs
Salisbury, NC
Effective 7Q10
736 cfs (based on 24.8:1dilution instream)
Average Flow (cfs):
4,879
IwC
4.04
FACILITY OVERVIEW
The facility is currently permitted for 12. 5 MGD and 20 MGD. The City of Salisbury recently
combined two wastewater treatment permits (Grants Creek and Town Creek) into one permit. The
permit name is the City of Salisbury WWTP. Both wastewater treatment trains discharge under a
common effluent line via diffusion to the Yadkin River. The combined discharge started on
September 1, 2000.
In addition to the City of Salisbury, the facility also serves the Towns, of China Grove, Landis, Faith
and East Spencer, for a total population of approximately 48,000 people.
NCO023884 Permit Factsheet
Page 1

Salisbury has a full pre-treatment program, with 5 SIUs (Significant Industrial Users) and 2 CIUs
(Categorical Industrial Users) per its application. DWQ recommends that Salisbury continue to
implement the full pretreatment program and its Long Term Monitoring Plan through the
renewed permitting cycle.
The Division issued a permit modification on 3/26/2013 for the reduction of the effluent
monitoring frequencies for BOD, TSS, ammonia, and fecal coliform due to the WWTP meeting the
Division's criteria for exceptionally performing facilities. The monitoring reduction applies only to
the 12.5 MGD Tier since the facility has no effluent monitoring data for 20 MGD Tier.
CORMIX MODEL RESULTS
In January 2006, the City of Salisbury ran. an updated CORMIX model. Teresa Rodriguez did the
NPDES review of the CORMIX model. Major changes included a revised 7Q10 flow of 735 cfs,
which was determined by ENSR at the request of the City of Salisbury. Consultation with USGS
indicated that while there is uncertainty determining 7Q10 flows in a lake, "an estimated 7Q10 for
the Yadkin River between the South Yadkin River confluence and Grants Creek is a range of 750 —
800 cfs. This range of estimates does not account for any backwater effects of High Rock Lake that
may exist during low flow periods." Although the flow estimate by ENSR is a little lower, NPDES
will use the 735 cfs that ENSR generated and that Salisbury used in its CORMIX model run.
The model run included revised stream flow information and a proposed modification to close two
of the ports on the existing three -port diffuser. The other variable included the critical condition
now being the lake level of 5 feet below full pool for developing toxic limits. Based on the results of
the CORMIX model, the instream waste concentrations are 5.3 % at 12.5 MGD and 4% at 20
MGD.
Effective 7Q10 values generated to determine the IWCs are 348 cfs at 12.5 MGD and 736 cfs at 20
MGD. (this is slightly above than the 7Q10 flow of 735 cfs used in the model).
RECEIVING STREAM
City of Salisbury WWTP discharges treated municipal and industrial wastewater to the Yadkin River
in the Yadkin -Pee Dee River basin. The stream classification of this segment of the Yadkin River is
WS-V. The facility discharges upstream of the High Rock Lake and is included in the High Rock
Lake watershed.
Instream monitoring is required for temperature, dissolved oxygen, pH, Total phosphorus,
NO2+NO3, NH3, Total Kjeldahl Nitrogen, and chlorophyll a. However, Salisbury is a member of
the Yadkin -Pee Dee Association Coordinated Monitoring Program. Instream monitoring
requirements are waived as long as Salisbury remains a member. .
TOXICITY TESTING
Type of Toxicity Test: Chronic P/F
Existing Limit: 001: Chronic P/F @ 5.3%
Recommended Limit: 001: Chronic P/F @ 5.3%
Monitoring Schedule: March, June, September, and December
The facility has been consistently passing all quarterly toxicity tests during the previous permit cycle,
please see attached.
NC0023884 Permit Factsheet
Page 2

COMPLIANCE HISTORY
The facility appears to have had an excellent compliance record for the past four years with no
violations, please see attached.
REASONABLE POTENTIAL ANALYSIS
RPA was conducted for Total Phenolic Compounds, Cu, Ni, Ag, Zn, Chloroform,
Dichlorobromomethane, and Chlorodibromomethane. The RPA does not show reasonable
potential for all these parameters to exceed water' quality standards/criteria. Please see attached.
MERCURY EVALUATION
The mercury evaluation was conducted in accordance with the Permitting Guidelines for Statewide
Mercury'TMDL..
WQBEL allowable concentration for this facility is 227.7 ng/L. All Annual average mercury
concentrations are below allowable. However, it is impossible to determine if there are values that
exceed TBEL of 47 ng/L because the facility used EPA 245.1 for analysis. Therefore, the limit for
mercury will not be added until the facility conducts PPA scans that require more sensitive method.
Nevertheless, we have to make an assumption that the facility with the pretreatment program would
have mercury results above I ng/L. Hence, .based on the Permitting Guidelines for Statewide
Mercury TMDL, the Mercury Minimization Plan will be added to the permit.
PERMIT LIMITS
• BOD limits in the permit are based on the water quality model.
• TSS limits in the permit are based on the requirements of the 40 CFR 133.102.
• Ammonia limits in the permit are based on the water quality model. The Division uses
ammonia criteria that were developed by EPA: 1 mg/L - summer; 1.8 mg/L — winter.
• TRC limit in _the permit is based on the North Carolina water quality standards [15A NCAC
2B .0200].
• pH limit in the permit is based on the North Carolina water quality standards [15A NCAC
2B .0200].
• Fecal Coliforms limits in the permit are based on the North Carolina water quality standards
[15A NCAC 2B .0200].
PROPOSED CHANGES
• 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.
The requirement to begin reporting discharge monitoring data electronically using the NC
DWWs Electronic Discharge Monitoring Report (eDMR) internet application has been
added to the permit. [See Special Condition A. (8.)].
Monitoring for Total Silver and Total Copper was removed from the permit based on the
results of the statistical analyses of the effluent data.
Based on the Permitting Guidelines for Statewide Mercury TMDL, the Mercury
Minimization Plan special condition will be added to the permit (Please see A. (9.)).
Nutrient Reopener for High Rock Lake was added to the permit (Please see A. (10.)).
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: April 2, 2014.
Permit Scheduled to Issue: June 6, 2014.
NC0023884 Permit Factsheet
Page 3

STATE CONTACT:
Tf you have any questions on any of the above information or on the attached permit, please contact
Sergei Chernikov at [phone].
NC0023884 Permit Factsheet
Page 4

Salisbury Rowan WWTP 2014 Freshwater RPA - .95% Probability/95% Confidence
NCO023884 MAXIMUM DATA POINTS = 58
Qw (MGD) = 12.50 WWTP/WTP Class: IV
1Q10S (cfs) = 281.59 IWC @ 1Q10S = 6.44%
7QIOS (cfs) = 348.00 IWC @ 7Q10S = 5.27%
7Q10W (cfs) = NO 7Q10w DATA IWC @ 7Q10W = N/A
30Q2 (cfs) = 348.00 IWC @ 30Q2 = 5.27%
Avg. Stream Flow, QA (cfs) = 4879.00 IWC @ QA = 6.40%
Receiving Stream: Yadkin River Stream Class: WS-V
Outfall 001
Qw=12.5MGD
PARAMETER
STANDARDS & CRITERIA (2)
uJ
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
TYPE
NC WQS / Applied 1/z FAV /
Max Pred
(1)
a
z
n # Det. Allowable Cw
Chronic Standard Acute
Cw
Acute: NO WQS
Total Phenolic Compounds
nA
a
NC
300 A(30Q2)
ug/L-
3 3 57.0
_ _ _ _�
Note: n < 9 Default C.V. Chronic: 5,692.6
n
`
Limited data set No value > Allowable Cw
Gs =� J;a�', 0,., r;
Acute: 113.4
p r
Copper (AL)
NC
7 FW(7QlOs) 7.3
ug/L
58 58
50.0
no tuna a G n r
_ _
Chronic-- -- 132.8 —
_
"° �4 '
No value > Allowable Cw
remove mornonng
r ,,,,,,,,-, a
Acute: 41052.8
r%lii 4
Nickel
NC
88 FW(7QIOs) 261
ug/L
3 3 22.2
Note: n <_ 9 Default C.V.
_ ----------
Chronic: 1,669.8
Limited data set
No value > Allowable Cw
Acute: 19.099
no I I aI: values below detect, ? 9
Silver (AL)
NC
0.06 FW(7Q10s) 1.23
ug/L
58 0
2.500
4d�
_ _ __ _ __
Chronic I _ -
� � 1� �
58 values > Allowable Cw
remove morntonng
Acute: 1,040.4
a '-
r%b iimd
Zinc (AL)
NC
50 FW(7Q10s) 67
ug/L
5 5 139.4
a
Note: n < 9 Default C.V.
Chronic 948 8
(� 4 q * °I
Limited data set
No value > Allowable Cw
Acute: NO WQS
na hm�t a gin',r� r
Chloroform
C
5.6 WS(Qavg)
µg/L
3 3 90.00000
Note: n:5 9 Default C.V.
--_ _
Chronic: 1400.00000
�
Limited data set
No value > Allowable Cw
i 4 Ol
Acute: NO WQS
n limit ��'� �tC
Dichlorobromomethan
C
0.55 WS(Qavg)
µg/L
3 732634000
Q.R.
a it iNote:
n _< 9 C.V.
_ _ _ _ _
Chronic 137.50000
"���
Limited data set
No value > Allowable CwW
y,,
Acute: NO WQS
r r� ,�
� ' n a i
Chlorodibromomethan
C
0.4 WS(Qavg)
µg/L
3 3 3.66000
aoiirnit � a ur
ads ��Gf * �1 �
r
Note: n <9 Default C.V.
_ _ _ _
Chronic: 100:00000
—
,W 4€
Limited data set
No > Allowable Cw
��� I v
value
23884-RPA-2014, rpa
Page 1 of 1 4/3/2014

REASONABLE POTENTIAL ANALYSIS
9
3
13.
4
11.
5
13.'
6,
A
8
12.
9
12
11
12
,14.
13
9.
14
a 9
15
''
16
7.�
17
7:
18
?
7.
19
20
21
22"
7
23
7`
24
,,5.'
25
8.
26
12_
27
8f
28
8.
29
�,�.��'
30
13.
31
10.
32_
11.
33
114
34
G °R °". :14.
35
15.
36
37(
11.
381
10:,
39(
7:
40(
411
3.
42�
43
37.
44
45
45.
46
47
' ,- ,-
�, 2
48
,
_ 13:
49
x 9:
50
1 T.
51
„_ 12.
53
54.e``
55
56
57 ,
58 ,.
Copper (AL)
311
BDL=1/2DL
Results
13.3
Std Dev.
14.3603
0.6381
58
1.00
50.0 ug/L
50.0 ug/L
15
Date Data
Nickel
BDL=1/2DL
Results
7.4
Std Dev.
4.7
Mean
7.4
C.V. (default)
n
Mult Factor =
Max. Value
Max. Pred Cw
1.5588
6.5000
0.6000
3
3.00
7.4
22.2
-2-
23884-RPA-2014, data
4/3/2014

m m cn m m m cn m cn AAA A A A A AAA w W W W w W W W W W N N N" N N N N N N -+ - - s s — I I V
m V A N 0m m .W O W m —! 0 A V cn A W N O W W W W N� O W m V W M A W OW m V m M A W N— O W m V 07 m A W N�
w
m
v
w
m �
v
r �
N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N p D
in in cn in cn cn cn cn in cn N cn in m vt Ut cn in vt in v, cn w in <n cn in in cn cn cn cn in cn cn in u, cn v, in cn cn <n in cn � i.n in in in cn cn cn �n cn cn cn cn r r
KEE
n m n (D
m 0) <
OR
� n
Nn
(J m -
O PP
ocno
O CD O
W O O O
Ot O O O
O O O
m 0 0 0
r- C:
OD V w of .A. W N!": O( Oo J m G .A W N j 6 i0 6 V 6 dt A W N n O CO Oo V W 8n A W N -� O c0 Oo V m G A W N -+ O c0 m V m m A W N -+
v
N
r
�
n
�
comp W WN
a
co co O (.0 ao p
r.
b)in�b)mr
X X C
< N n CD
N
n
vc
N n
N < N
C O
C
n O
� 11
m
m
O O W
p k
W m N
(0O
m W CD
NO
G
N
mOON
8

REASONABLE POTENTIAL ANALYSIS
ug/L
ug/L
19
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
Chloroform
Maximnin ata
poi is �58�
Date Data BDL=1/2DL Results
30 Std Dev.
6.2354
19.2 Mean
26.4000
30 C.V. (default)
0.6000
n
3
Mult Factor =
3.00
Max. Value
30.000000 pg/L
Max. Pred Cw
90.000000 pg/L
20
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
Date Data
Dichlorobromomethan
BDL=1/2DL
Results
8.78
Std Dev.
5.3
Mean
8.78
C.V. (default)
n
Mult Factor =
Max. Value
Max. Pred Cw
-4-
23884-RPA-2014, data
4/3/2014

REASONABLE POTENTIAL ANALYSIS
21
na u1Cn VV�I Chlorodibromomethan V21 05 men 111, T-
Maximum tlata ..Maximum tlata
points = 68 points =58 .
Date Data BDL=1/2DL Results
7.6200
0.6000
3
3.00
8.780000 pg/L
26.340000 pg/L
1.22 Std Dev.
0.4677
0.41 Mean
0.9500
1.22 C.V. (default)
0.6000
n
3
Mult Factor =
3.00
Max. Value
1.220000 pg/L
Max. Pred Cw
3.660000 pg/L
-5-
i
23884-RPA-2014, data
4/3/2014

_f E .' o ;. . . _- :-
To:
NPDES Unit
Attention: Tom Belnick
SOC Priority Project: No
Date: January 21, 2014
NPDES STAFF REPORT AND RECOMMENDATIONS
County: Rowan
NPDES Permit No.: NCO023884
1. Facility and Address: Salisbury - Rowan WWTP Physical Location
City of Salisbury 1915 Grubb Ferry Road
PO Box 479 Salisbury, NC 28144
Salisbury, N.C. 28145
2. Date of Investigation: October 18, 2013
3. Report Prepared By: Wes Bell, Environmental Specialist
4. Person Contacted and Telephone Number: Martin Trexler/ORC & WWTPs Operations
Manager [phone]; Sonja Basinger/Environmental Services Manager [phone]
5. Directions to Site: From the junction of Hollywood Drive and Grubb Ferry Road in the
Town of Spencer, travel east on Grubb Ferry Road approximate) The, 3A[UTX
located on the right side of Grubb Ferry Road. D 12 QWN
6. Discharge Point(s), List for all discharge Point: [FFR Q 2 2 014
Outfall 001 DENT
Latitude: 350 44' 07" LPOIT§%ffi PRANC'
Longitude: 80' 26' 50"
See USGS Map included with the renewal application for specific location of the outfall.
USGS Quad No.: E 17 NW
7. Receiving Stream or Affected Surface Waters: Yadkin River
a. Classification: WS-V
b. River Basin and Subbasin No.: Yadkin 03-07-04
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater and description of wastewater source(s) of each outfall:

Page Two
Outfall 001-12.5 MGD — domestic and industrial (7 total SIUs with 2 being CIUs). The
discharge consists of the combined treated waste streams from two separate WWTP trains
(7.5 MGD Grant Creek WWTP and 5.0 MGD Town Creek WWTP). Description of the
existing WWT facilities:
Grant Creek WWTP train:
bar screens, grit removal, influent pump station, primary clarification (rectangular clarifiers),
trickling "roughing" filter, aeration basin with mechanical aeration, secondary clarification
(rectangular and circular clarifiers), liquid chlorination, chlorine contact chamber, aerobic
digestion, belt filter press, covered sludge storage, standby power;
Town Creek WWTP train:
bar screens, grit/grease removal, aeration basins with mechanical aeration, secondary
clarification (circular clarifiers), liquid chlorination, chlorine contact chamber, pump station,
aerobic digestion, belt filter press, covered sludge storage, standby power;
The chlorinated effluents from both WWTP trains are combined prior to dechlorination
(liquid), effluent flow measurement, LTV (backup disinfection), cascade aeration, effluent
pump station, diffuser.
b. Pretreatment Program: Approved
PART III - OTHER PERTINENT INFORMATION
Special monitoring or limitations (including toxicity) requests:
The City requests the permit name be changed from Salisbury — Rowan WWTP to the City
of Salisbury WWTP. The City also has requested the removal of the permit monitoring
requirement for effluent silver. The last three years of effluent results for silver have been
<5 ug/L and quarterly monitoring for effluent silver will continue under the City's
Pretreatment Program/Long Term Monitoring Plan. This Office has no objections to the
City's requests.
PART IV - EVALUATION AND RECOMMENDATIONS
The Division issued a permit modification on 3/26/2013 for the reduction of the effluent
monitoring frequencies for BOD, TSS, ammonia, and fecal coliform due to the WWTP meeting the
Division's criteria for exceptionally performing facilities. The WWTP (both trains) appeared to be
properly operated and well maintained at the time of the inspection. The renewed permit should
reflect liquid chlorination and dechlorination as the primary treatment processes with UV
disinfection as backup. It is recommended that the suect Permit be renewed as requested.
Signature of Report Preparer Date
Water Quality Regional Supervisor ate

Thedford, Wren
From: Sonja Basinger [[e-mail]]
Sent: Friday, January 03, 2014 8:58 AM
To: Thedford, Wren
Subject: Salisbury Permit Renewal App NC0023884
Importance: High
Ms. Thedford,
Please attach this email to the subject permit renewal application. There is an error in item A.2. of the Applicant
Information Section.
The question is "Is the applicant the owner or operator (or both) of the treatment works?" The correct answer is "Both".
The City is both the owner and operator of the WWTP.
Thank you,
Sonja Basinger
Environmental Services Manager
Salisbury -Rowan Utilities 11 Environmental Services
City of Salisbury I 1 1915 Grubb Ferry Rd, Salisbury, North Carolina 28144t!!sL►t/ly
Office: [phone] 11 Cell: [phone] 11 Fax: [phone]
[e-mail] 11 www.salisburync.gov/SRU

December 23, 2013
Ms. Wren Thedford
NCDENR/ DWR/ NPDES
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
R Erge
DEC 30 2013 V
DENR-wwrER QUALITY
POINT SOURCE BRANCH
Re: City of Salisbury Wastewater Treatment Plant (WWTP) Permit Renewal NCO023884
Dear Ms. Thedford,
The City of Salisbury (The City) requests the name change of the Salisbury -Rowan
WWTP to the City of Salisbury WWTP. The City also requests the renewal of the City of
Salisbury WWTP permit and submits the attached permit application and supporting documents
for renewal of the subject permit which expires on June 30, 2014.
The City has added liquid chlorine as primary disinfection at the Grant Creek and Town
Creek Treatment Trains and a liquid dechlorination system to the combined effluent since
issuance of our last permit (disinfection and dechlorination systems online February 2011).
The City eliminated the Second Creek WWTP (NC0078361) in October 2013, and
redirected the wastewater from the package plant (the flow consists of a middle school and one
industry) to the Grant Creek wastewater treatment train (VWVM.
The effluent data for the silver parameter has been < 5 ug/I for three years. Since silver is
monitored quarterly in our Pretreatment Long Term Monitoring Program, the City requests the
removal of the silver monitoring from the subject permit.
Please contact me at [phone] if you require any clarification or additional
information regarding the subject renewal package.
Sincerely,
Sonja Basinger
Environmental Services Manager
Enclosures (Application, Maps, SIUs, Sludge Management Narrative, Silver data)
cc: Mr. Doug Paris, City Manager, City of Salisbury
Mr. Jim Behmer, Utilities Director, City of Salisbury
1 Water Street Telephone [phone]
Salisbury, NC 28144 Fax [phone]