NC0023981_Permit (Issuance)_20161128

NPDES DOCUMENT MANNINO COVER SHEET
NPDES Permit:
NC0023981
Lenoir — Lower Creek WWTP
Document Type:
Permit Issuance--
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Technical Correction
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
November 28, 2016
This document is printed on reuse paper - ignore any
content on the rem/ex-Ise side

PAT MCCRORY
Goren,or
DONALD R. VAN DER VAART
Set'? e,m)
S. JAY ZIMMERMAN
Di,ecior
Water Resources
ENVIRONMENTAL. QUALITY
November 28, 2016
Mr. Radford Thomas
Director of Public Utilities
City of Lenoir
P.O. Box 958
Lenoir NC 28645-0958
Subject: Final NPDES Permit Renewal
Permit NC0023981
City of Lenoir Lower Creek WWTP
Caldwell County
Class IV Facility
Dear Mr. Thomas:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached 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 October 15, 2007 (or as subsequently
amended).
The following modification was made to the draft permit of October 4, 2016.
• Footnote 7 in A. (1) and A. (2) Effluent Limitations and Monitoring Requirements is modified.
The facility is not required to take hardness and dissolved metal samples in conjunction with
chronic toxicity tests.
• Special condition A. (6) Schedule of Compliance for Hardness Dependent Metals was modified
and interim dates for source identification and submission of corrective action plan were added to
the condition before the permittee achieves the compliance with total copper and total cadmium
limits by August 31, 2019.
This final permit contains the following changes from your previous permit:
• The NC 2007-2014 Water Quality Standard (WQS) Triennial Review was approved by the NC
Environmental Management Commission (EMC) on November 13, 2014. The US EPA
subsequently approved the WQS revisions on April 6, 2016 with some exceptions. The NC
Division of Water Resources NPDES Permitting Unit is required to implement the new dissolved
metal standards in all permits public noticed after April 6, 2016.
The new standards for most metals include acute standards. Further, the freshwater standards for
several metals are expressed as the dissolved form of the metals, and seven metals have hardness -
State of North Carolina 1 Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, North Carolina 27699-1617
919 807 6300

Page 12
dependent equations. As a result, the NPDES Permitting Unit will need site -specific effluent
hardness data and instream hardness data, upstream of the discharge, for each facility monitoring
these metals in order to calculate permit limitations. Effluent and upstream hardness have been
added to this permit at a quarterly monitoring frequency. Footnote 7 was added to A. (1) and A.
(2) Effluent Limitations and Monitoring Requirements in Part I to require hardness sampling in
conjunction with metal sampling.
• Copper, cadmium and silver showed reasonable potential to violate water quality standards.
Monthly average and daily maximum limits for copper were added in the permit and monitoring
frequency was increased from quarterly to monthly. Effluent discharge limit for silver was not
added as only one sample result was above the detection level during the last permit cycle.
However, monitoring frequency was increased from quarterly to monthly. If silver is detected
above 1 µg/1 /1 during this permit cycle, effluent discharge limits will be added in the next cycle.
• As a result of the RPA, more stringent daily maximum and monthly average limits were added for
cadmium. Current limits are maintained as interim limits until August 31, 2019 (See condition A.
(1
))•
• Special condition A. (6) Schedule of Compliance for Hardness Dependent Metals was added in the
permit to achieve compliance with total copper and total cadmium limits by August 31, 2019.
• Footnote 8 was added in A. (1) and A. (2) Effluent Limitations and Monitoring Requirements to
analyze total cadmium and total silver at their lowest reporting level.
• As a result of Reasonable Potential Analysis (RPA), permit limits for cyanide, nickel and selenium
were removed. The monitoring frequency for cyanide was changed from monthly to quarterly.
Nickel and selenium did not show reasonable potential to violate water quality standards, hence
monitoring requirements for these parameters were removed.
• As a part of the Statewide TMDL for mercury, the City of Lenoir is required to continue
implementing its existing Mercury Minimization Plan in the next permit cycle. Special condition
A. (5) has been modified to add narrative for this requirement.
• Effluent monitoring frequency for total nitrogen and total phosphorous was changed from weekly
to monthly and instream monitoring for these two parameters was removed due to the change in
impairment status of Lake Rhodhiss which is no longer listed in 303d list.
• Instream monitoring of fecal coliform was removed as Lower Creek is not impaired for fecal
coliform since 2014 according to the 303d list.
• Starting December 21, 2016, 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 final NPDES Electronic Reporting Rule was adopted and became effective
on December 21, 2015.
The requirement to begin reporting discharge monitoring data electronically using the NC DWR's
Electronic Discharge Monitoring Report (eDMR) intemet application has been added to your
final NPDES permit. [See Special Condition A. (5)] For information on eDMR, registering for
eDMR and obtaining an eDMR user account, please visit the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr.

Page 13
For more information on EPA's final NPDES Electronic Reporting Rule, please visit the
following web site:
http://www2.epa.gov/compliance/final-national-pollutant-di scharge-elimination-system-npdes-
electronic-reporting-rule.
If any parts, measurement frequencies or sampling requirements contained in this permit are unacceptable
to you, you have the right to an adjudicatory hearing upon written request within thirty (30) days following
receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of
the North Carolina General Statutes, and filed with the Office of Administrative Hearings (6714 Mail
Service Center, Raleigh, North Carolina 27699-6714). Unless such demand is made, this decision shall be
final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may require
modification or revocation and reissuance of the permit. This permit does not affect the legal requirements
to obtain other permits which may be required by the Division of Water Resources or any other Federal,
State, or Local governmental permits that may be required.
If you have any questions concerning this permit, please contact Trupti Desai at [phone] or via
email at [e-mail].
Sincerely,
S. Jay Zimmerman, P.G.
Director, Division of Water Resources, NCDEQ
Hardcopy: NPDES Files
Central Files
DWR/Asheville Regional Office/Supervisor, Water Quality/Landon Davidson
Ecopy: US EPA Region 4
DWR/Aquatic Toxicology Branch/Susan Meadows
DWR/PERCS/Sarah Bass

Permit NC0023981
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
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,
City of Lenoir
is hereby authorized to discharge wastewater from a facility located at
City of Lenoir — Lower Creek WWTP
1905 Broadland Road
Lenoir
Caldwell County
to receiving waters designated as Lower Creek in the Catawba River Basin in accordance with effluent
limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective January 1, 2017.
This permit and authorization to discharge shall expire at midnight on February 29, 2020.
Signed this day November 28, 2016.
for, S. Jay Zimmerman, P.G., Director
Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 12

Permit NC0023981
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under the
permit conditions, requirements, terms, and provisions included herein.
City of Lenoir is hereby authorized to:
1. Continue operation of a 6.0 MGD wastewater treatment plant consisting of the following
treatment units:
• Mechanical bar screen
• Cyclonic grit removal
• Influent pump station
• Aeration basin w/anaerobic/aerobic/anoxic process for nutrient removal
• Dual clarifiers
• Aerobic digester/sludge holding with mixers
• Belt press lime pasteurization
• Chlorination
• Dechlorination
• Sludge holding lagoon
• Three centrifugal blowers
The facility is located at the City of Lenoir — Lower Creek WWTP, 1905 Broadland Rd., Lenoir,
Caldwell County, and;
2. Discharge treated wastewater from said treatment works at the location specified on the attached
map through outfall 001 into Lower Creek, which is classified C water, in the Catawba River
Basin.
Page 2 of 12

Permit NC0023981
PART I
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until August 31, 2019, the
Permittee is authorized to discharge treated municipal wastewater from outfall 001. Such discharges
shall be limited and monitored' by the Permittee as ified below:
R- nTO a
•-T '+.. t• „
'.c. F
_ .s-
.,�., i;ja= i .-;
2 _, ' '
• r.. ..e... .c:.;.$i,-..
..y''
A';2-:;bra' ti-.�4 '
..yew.........-.7 .''
..: w-.....-:;. Yr
- ro. ° ;
-V
.;W 7';?''':
ryF�.+.� -
0n... j1•1.et {
i zC 'p : et.
6! S m0,
Flow
6.0 MGD
Continuous
Recording
I or E
BOD, 5-day, 20°C (Summer)M
22.0 mg/1
33.0 mg/1
Daily
Composite
I, E
BOD, 5-day, 20°C (Winter)34
30.0 mg/1
45.0 mg/1
Daily
Composite
I, E
Total Suspended Solids3
30.0 mg/1
45.0 mg/1
Daily
Composite
I, E
NH3-N (Summer)'
2.0 mg/1
6.0 mg/1
Daily
Composite
E
NH3-N (Winter)4
4.6 mg/1
13.8 mg/1
Daily
Composite
E
Fecal Coliform
200/ 100 ml
400/ 100 ml
Daily
Grab
E
Dissolved Oxygen (Summer)0
Daily
Grab
E
Dissolved Oxygen (Winter)4
Daily
Grab
E
Temperature
Daily
Grab _
E
Conductivity
Daily
Grab
E
pH
Between 6.0 and 9.0 S.U.
Daily
Grab
E
Total Residual Chlorine'
28 j.tg/1
Daily
Grab
E
Hardness -Total as
fCaCO3 or (Ca + Ma)17 (ma/1)
Quarterly
Composite
E
Hardness -Total as
[CaCO3 or (Ca + Mg)] 7 (mg/1)
Quarterly
Grab
U
Total Copper" (µg/1)
Monthly
Composite
E
Total Cadmium'," (141)
4.5
31
Monthly
Composite
E
Total Silver"," (11g/1)
Monthly
Composite
E
Total Zinc' (1-1g/1)
Quarterly
Composite
E
Cyanide' (11g/1)
Quarterly
Grab
E
Total Nitrogen (mg/1)
(NO2-N + NO3-N + TICN)
Monitor and Report
Monthly
Composite
E
Total Phosphorus (mg/1)
Monitor and Report
Monthly
Composite
E
Chronic Toxicity9
Ceriodaphnia, P/F @ 44%
Quarterly
Composite
E
Dissolved Oxygen10
Variable
Grab
U,D
Temperature10
Variable
Grab
U,D
Conductivity10
Variable
Grab
U,D
Effluent Pollutant Scan
Monitor & Report
Footnote 11
Footnote 11
E
Footnotes:
1. Effective December 21, 2016 begin submitting discharge monitoring reports electronically using NC DWR's eDMR
application system. See Special Condition A.(7)
2. Sample Location: I- Influent, E - Effluent, U- Upstream 100 feet from outfall, D- Downstream at SR 1142
3. The monthly average effluent BODs and Total Suspended Solids concentrations shall not exceed 15% of the respective influent
value (i.e. 85% Removal).
4. Summer is defined as April 1 through October 31; Winter is defined as November 1 through March 31.
5. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/1.
6. The Division shall consider all effluent TRC values reported below 50 µg/1 to be in compliance with the permit. However, the
Pennittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified),
even if these values fall below 50 µg/1.
7. Sampling for copper, cadmium, cyanide, silver and zinc shall all coincide with sampling for hardness.
8. Total cadmium shall be tested to its lowest reporting level of 0.5 µg/1 and total silver at 1.0 µg/l.
9. Chronic Toxicity (Ceriodaphnia) at 44%: Feb, May, Aug, Nov [see A. (3)].
Page 3 of 12

Permit NC0023981
10. Receiving stream samples shall be taken three times a week during the months of June, July, August and September, and once per
week during the remainder of the year
11. The permittee shall perform three Effluent Pollutant Scans during the term of this permit [see A. (4)].
There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent, unless
ambient river conditions prevent compliance.
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on September 1, 2019 and lasting until expiration, the Permittee is
authorized to discharge treated municipal wastewater 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
Location2
Flow
6.0 MGD
Continuous
Recording
I or E
BOD, 5-day, 20°C (Summer)3,4
22.0 mg/1
33.0 mg/I
Daily
Composite
I, E
BOD, 5-day, 20°C (Winter)3,"
30.0 mg/1
45.0 mg/1
Daily
Composite
I, E
Total Suspended Solids3
30.0 mg/1
45.0 mg/I
Daily
Composite
I, E
NH3-N (Summer)4
2.0 mg/1
6.0 mg/I
Daily
Composite
E
NH3-N (Winter)4
4.6 mg/1
13.8 mg/1
Daily
Composite
E
Fecal Coliform
200/ 100 ml
400/ 100 ml
Daily
Grab
E
Dissolved Oxygen (Summer)4,'
Daily
Grab
E
Dissolved Oxygen (Winter)4
Daily
Grab
E
Temperature
Daily
Grab
E
Conductivity
Daily
Grab
E
pH
Between 6.0 and 9.0 S.U.
Daily
Grab
E
Total Residual Chlorine'
28 µg/1
Daily
Grab
E
Hardness —Total as
[CaCO3 or (Ca + Me)1' (me/1)
Quarterly
Composite
E
Hardness —Total as
[CaCO3 or (Ca + Mg)]' (mg/1)
Quarterly
Grab
U
Total Copper' (µg/1)
25.7
33.0
Monthly
Composite
E
Total Cadmium." (µgl!)
1.8
9.9
Monthly
Composite
E
Total Silver'•$ (µg/l)
Monthly
Composite
E
Total Zinc' (11g/1)
Quarterly
Composite
E
Cyanide' (µg/1)
Quarterly
Grab
E
Total Nitrogen (me)
(NO2-N + NO3-N + TKN)
Monitor and Report
Monthly
Composite
E
Total Phosphorus (mg/1)
Monitor and Report
Monthly
Composite
E
Chronic Toxicity'
Ceriodaphnia, P/F @ 44%
Quarterly
Composite
E
Dissolved Oxygen'0
Variable
Grab
U,D
Temperature10
Variable
Grab
U,D
Conductivity1°
Variable
Grab
U,D
Effluent Pollutant Scan
Monitor & Report
Footnote 11
Footnote 11
E
Footnotes:
1. Effective December 21, 2016 begin submitting discharge monitoring reports electronically using NC DWR's eDMR
application system. See Special Condition A.(7)
2. Sample Location: I- Influent, E — Effluent, U- Upstream 100 feet from outfall, D- Downstream at SR 1142
3. The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective influent
value (i.e. 85% Removal).
4. Summer is defined as April 1 through October 31; Winter is defined as November 1 through March 31.
5. The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/I.
Page 4 of 12

Permit NC0023981
6. The Division shall consider all effluent TRC values reported below 50 nil to be in compliance with the permit. However, the
Pennittee shall continue to record and submit all values reported by a North Carolina certified laboratory (including field certified),
even if these values fall below 50 µg/l.
7. Sampling for copper, cadmium, cyanide, silver and zinc shall all coincide with sampling for hardness.
8. Total cadmium shall be tested to its lowest reporting level of 0.5 µg/1 and,total silver at 1.0 µg/1.
9. Chronic Toxicity (Ceriodaphnia) at 44%: Feb, May, Aug, Nov [see A. (3)].
10. Receiving stream samples shall be taken three times a week during the months of June, July, August and September, and once per
week during the remainder of the year
11. The permittee shall perform three Effluent Pollutant Scans during the term of this permit [see A. (4)].
There shall be no discharge of floating solids or visible foam (other than trace amounts) in the effluent, unless
ambient river conditions prevent compliance.
A. (3) CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
[15A NCAC 02B .0200 et seq.]
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 44%.
The permit holder shall perform at a minimum, quarterly monitoring using test procedures outlined in the
"North Carolina Ceriodaphnia Chronic Effluent Bioassay Procedure," Revised December 2010, or
subsequent versions or "North Carolina Phase 11 Chronic Whole Effluent Toxicity Test Procedure"
(Revised- December 2010) or subsequent versions. The tests will be performed during the months
February, May, August and November. These months signify the first month of each three-month
toxicity testing quarter assigned to the facility. Effluent sampling for this testing must be obtained during
representative effluent discharge and shall be performed at the NPDES permitted final effluent discharge
below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV
below the permit limit, then multiple -concentration testing shall be performed at a minimum, in
each of the two following months as described in "North Carolina Phase II Chronic Whole Effluent
Toxicity Test Procedure" (Revised -December 2010) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter
code TGP3B for the pass/fail results and THP3B for the Chronic Value. Additionally, DWR Form AT-3
(original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete, accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the waste stream.
Page 5 of 12

Permit NC0023981
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
Water Sciences Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring
will be required during the following month. Assessment of toxicity compliance is based on the toxicity
testing quarter, which is the three month time interval that begins on the first day of the month in which
toxicity testing is required by this permit and continues until the final day of the third month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division
of Water Resources indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later than
the last day of the month following the month of the initial monitoring.
Page 6 of 12

Permit NC0023981
A. (4) EFFLUENT POLLUTANT SCAN (Municipal POTWs) [G.S. 143-215.1(b)]
The Permittee shall perform a total of three (3) Effluent Pollutant Scans for all parameters listed below.
One scan must be performed in each of the following years: 2017, 2018, and 2019. Analytical methods
shall be in accordance with 40 CFR Part 136 and shall be sufficiently sensitive to determine whether
parameters are present in concentrations greater than applicable standards and criteria. Samples should be
collected with one quarterly toxicity test each year, and must represent seasonal variation [i.e., do not
sample in the same quarter every year]. Unless otherwise indicated, metals shall be analyzed as "total
recoverable."
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate
Nitrite
Kjeldahl nitrogen
Oil and grease
Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury (Method 1631E)
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethyl vinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
C0610
50060
00300
00620
00615
00625
00556
C0665
70295
00900
01097
01002
01012
01027
01034
01042
01051
COMER
01067
01147
01077
01059
01092
00720
32730
34210
34215
34030
32104
32102
34301
34306
85811
34576
32106
32101
34496
1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-creso
2-chlorophenol
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
Acenaphthylene
Anthracene
Benzidine
Benzo(a)anthracene
Benzo(a)pyrene
3,4 benzofluoranthene
Benzo(ghi)perylene
Benzo(k)fluoranthene
32103
34546
34501
34541
77163
34371
34413
34418
34423
81549
34475
34010
34506
34511
39180
39175
34452
34586
34601
34606
34657
34616
34591
34646
39032
34694
34621
34205
34200
CO220
39120
34526
34247
34230
34521
34242
Bis (2-chloroethoxy) methane
Bis (2-chloroethyl) ether
Bis (2-chloroisopropyl) ether
Bis (2-ethylhexyl) phthalate
4-bromophenyl phenyl ether
Butyl benzyl phthalate
2-chloronaphthalene
4-chlorophenyl phenyl ether
Chrysene
Di-n-butyl phthalate
Di-n-octyl phthalate
Dibenzo(a,h)anthracene
1,2-dichlorobenzene
1,3-dichlorobenzene
1,4-dichlorobenzene
3,3-dichlorobenzidine
Diethyl phthalate
Dimethyl phthalate
2,4-dinitrotoluene
2,6-dinitrotoluene
1,2-diphenylhydrazine
Fluoranthene
Fluorene
Hexachlorobenzene
Hexachlorobutadiene
Hexachlorocyclo-pentadiene
Hexachloroethane
Indeno(1,2,3-cd)pyrene
Isophorone
Naphthalene
Nitrobenzene
N-nitrosodi-n-propylamine
N-nitrosodimethylamine
N-nitrosodiphenylamine
Phenanthrene
Pyrene
1,2,4-trichlorobenzene
34278
34273
34283
39100
34636
34292
34581
34641
34320
39110
34596
34556
34536
34566
34571
34631
34336
34341
34611
C0626
34346
C0376
34381
C0700
39702
34386
34396
34403
34408
34696
34447
34428
34438
34433
34461
34469
34551
Page 7 of 12

Permit NC0023981
Reporting. Test results shall be reported electronically via eDMR or on DWR Form — DMR-PPA-1 (or
on a form approved by the Director) by December 318t of each designated sampling year. The
report shall be submitted to the following address:
NC DEQ / DWR / Central Files, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
Additional Toxicity Testing Requirements for Municipal Permit Renewal. Please note that
Municipal facilities that are subject to the Effluent Pollutant Scan requirements listed above are also
subject to additional toxicity testing requirements specified in Federal Regulation 40 CFR 122.21(j)(5)
and EPA Municipal Application Form 2A. The US EPA requires four (4) toxicity tests for a test
organism other than the test species currently required in this permit. The second species tests should be
conducted either quarterly for a 12-month period prior to submittal of the permit renewal application, or
four tests performed at least annually in the four and one half year period prior to the application. The
second species tests must be multiple concentration (5 concentrations plus the control). These tests shall
be performed for acute or chronic toxicity, whichever is specified in this permit. Publicly Owned
Treatment Works (POTWs) performing NPDES chronic Ceriodaphnia testing should perform chronic
Fathead minnow testing. POTWs performing NPDES acute Fathead Minnow testing should perform
acute Ceriodaphnia testing. POTWs performing NPDES chronic Mysid shrimp testing should perform
chronic Silverside Minnow testing.
The second 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. (5) MERCURY MINIMIZATION PLAN (MMP) [G.S. 143-215.1(b)]
The permittee shall continue implementing its existing mercury minimization plan during this permit
term. The 1AVIP shall be available for inspection on -site. 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. Performance of the Mercury Minimization Plan will meet the
requirements of the TMDL (Total Maximum Daily Load) for mercury approved by USEPA on October
12, 2012, unless and until a Waste Load Allocation specific to this facility is developed and this NPDES
permit is amended to require further actions to address the Waste Load Allocation.
A. (6) SCHEDULE OF COMPLIANCE FOR HARDNESS DEPENDENT METALS
(G.S. 143-215.1(b))
1. The permittee shall perform source identification of copper and cadmium in the effluent by January 1,
2018.
2. The permittee shall submit to the Division of Water Resources a Corrective Action Plan summarizing
the actions to be taken to achieve compliance with the total copper and total cadmium limits and a
schedule of activities to implement the Plan by January 1, 2019.
Page 8 of 12

Permit NC0023981
3. Achieve compliance with total copper and total cadmium limits by August 31, 2019 (See Condition
A. (2)).
Upon approval of the Corrective Action Plan by the Division, the report and actions become an
enforceable part of this permit. Any modifications to the schedule shall be requested to the Division at
least ninety (90) days before the deadline. Modifications to the schedule in excess of four months will be
subject to public notice.
A. (7) ELECTRONIC REPORTING OF MONITORING REPORTS [G.S. 143-215.1(b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports and specify that, if a state does not establish a system to receive such submittals, then permittees
must submit monitoring data and reports electronically to the Environmental Protection Agency (EPA).
The final NPDES Electronic Reporting Rule was adopted and became effective on December 21, 2015.
NOTE: This special condition supplements or supersedes the following sections within Part II of this
permit (Standard Conditions for NPDES Permits):
• Section B. (11.) Signatory Requirements
• Section D. (2.) Reporting
• Section D. (6.) Records Retention
• Section E. (5.) Monitoring Reports
1. Reporting Requirements [Supersedes Section D. (2.) and Section E. (5.) (a)]
Effective December 21, 2016, the permittee shall report discharge monitoring data electronically
using the NC DWR's Electronic Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter
monitoring data and submit DMRs electronically using the internet. Until such time that the state's
eDMR application is compliant with EPA's Cross -Media Electronic Reporting Regulation
(CROMERR), permittees will be required to submit all discharge monitoring data to the state
electronically using eDMR and will be required to complete the eDMR submission by printing,
signing, and submitting one signed original and a copy of the computer printed eDMR to the
following address:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility
being physically located in an area where less than 10 percent of the households have broadband
access, then a temporary waiver from the NPDES electronic reporting requirements may be granted
and discharge monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or alternative
forms approved by the Director. Duplicate signed copies shall be submitted to the mailing address
above. See "How to Request a Waiver from Electronic Reporting" section below.
Page 9 of 12

Permit NC0023981
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.
Starting on December 21, 2020, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
• Sewer Overflow/Bypass Event Reports;
• Pretreatment Program Annual Reports; and
• Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time of
each electronic submission. The permittee should use the EPA's website resources to identify the
initial recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity
for receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for
each type of electronic submission and for each state. Instructions on how to access and use the
appropriate electronic reporting tool will be available as well. Information on EPA's NPDES
Electronic Reporting Rule is found at: http://www2.epa.gov/compliance/final-nationalpollutant-
discharge-elimination-system-npdes-electronic-reporting-rule.
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Request a Waiver from Electronic Reporting
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the
Division. Requests for temporary electronic reporting waivers 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 submitting monitoring data and reports. The duration of a temporary
waiver shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports
shall be submitted electronically to the Division unless the permittee re -applies for and is granted a
new temporary electronic reporting waiver by the Division. Approved electronic reporting waivers
are not transferrable. Only permittees with an approved reporting waiver request may submit
monitoring data and reports on paper to the Division for the period that the approved reporting waiver
request is effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on
the following web page:
http://deq.nc.gov/about/divisions/water-resources/edmr
Page 10 of 12

Permit NC0023981
4. Signatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)]
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://deq.nc.gov/about/divisions/water-resources/edmr
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 certify, under penalty of law, that this document and all attachments were prepared under my
direction or supervision in accordance with a system designed to assure that qualified personnel
properly gather and evaluate the information submitted. Based on my inquiry of the person or persons
who manage the system, or those persons directly responsible for gathering the information, the
information submitted is, to the best of my knowledge and belief, true, accurate, and complete. I am
aware that there are significant penalties for submitting false information, including the possibility of
fines and imprisonment for knowing violations."
5. 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].
Page 11 of 12

Permit NC0023981
Lower Creek WWTP — NC0023981
City of Lenoir — Caldwell County
Receiving Stream: Lower Creek Stream cJass C
Drainage Basin: Catawba Sub -Basin: 03-07-12
Permitted How 6 MGD HUC: 0304010S
State Grid/USGS Quad: O12NE/ Lenoir, N.C.
N
I
Latitude 3552' 55'' Longitude 81' 34' 35'r
Page 12 of 12

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 Environ-
mental Management Commis-
sion proposes to issue a NP-
DES wastewater discharge
permit to the person(s) listed
below. Written comments re-
garding the proposed permit
will be accepted until 30 days
after the publish date of this
notice. The Director of the NC
Division of Water Resources
(DWR) may hold a public
hearing should there be a sig-
nificant degree of public in-
terest. 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 per-
mits and this notice may be
found on our website:
http://deq. nc. gov/about/divi-
sions/water-resources/water-
resources-permits/wastewa-
ter-branch/npdes-
wastewater/public-notices,or
by calling [phone].
The City of Lenoir requested
renewal of permit NC0023981
for the Lower Creek WWTP in
Caldwell County; this permit-
ted discharge is treated muni-
cipal wastewater to Lower
Creek, Catawba River Basin.
Oct 11, 2016
NORTH CAROLINA,
CALDWELL COUNTY,
AFFIDAVIT OF PUBLICATION
Before the undersigned, a Notary Public of said
County and State, duly commissioned, qualified, and
authorized by law to administer oaths, personally
appeared Terese Almquist who being first duly
sworn, deposes and says: that she is Publisher of
Lenoir Newspapers, Inc., engaged in the publication
of a newspaper known as Lenoir News -Topic,
published, issued, and entered as second class mail in
the City of Lenoir, in said County and State; that she
is authorized to make this affidavit and sworn
statement; that the notice or other legal advertisement,
a true copy of which is attached hereto, was published
in Lenoir News -Topic on the following dates
OCT. 11
and that the said newspaper in which such notice,
paper, document, or legal advertisement was
published was, at the time of each and every
publication. a newspaper meeting all of the
requirements and qualifications of Section 1-597 of
the General Statutes of North Carolina and was a
qualified newspaper within the meaning of Section 1-
597 of the General Statutes of North Carolina.
This 28th day of October16
Sworn to and subscribed before me, this 28th day of
October 2016.
Notary Public
My Commission expires' -s /7 -a2. 1/...7

Public Notice
North Carolina
Environmental Management
Commission/NPDES Unit
1617 Mall Service Center
Raleigh, NC 27699-1617
Notice of intent to Issue a
NPDES Wastewater Permit
The North Carolina Environ-
mental Management Commis-
sion proposes to issue a NP-
DES wastewater discharge
permit to the person(s) listed
below. Written comments re-
garding the proposed permit
will be accepted until 30 days
after the publish date of this
notice. The Director of the NC
Division of Water Resources
(DWR) may hold a public hear-
ing should there be a signific-
ant degree of public interest.
Please mall comments and/or
information requests to DWR
at the above address. Inter-
ested persons may visit the
DWR at 512 N. Salisbury
Street, Raleigh, NC to review
information on file. Additional
information on NPDES per-
mits and this notice may be
found on our website:
http://deq.nc.gov/about/divi-
sions/water-resources/water-
reso u rces-p erm i is/wa stewater-
bran ch/n pdes-wastewater/pub-
lic-notices,or by calling (919)
807-6397.
The City of Lenoir requested
renewal of permit NC0023981
for the Lower Creek WWTP in
Caldwell County; this permit-
ted discharge Is treated muni-
cipal wastewater to Lower
Creek, Catawba River Basin.
Oct. 11, 2016

DEPARTMENT OF ENVIRIONMENTAL QUALITY / DIVISION OF WATER RESOURCES
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
Lower Creek WWTP
NC0023981
Facility Information
Applicant/Facility Name:
City of Lenoir / Lower Creek WWTP
Applicant Address:
P.O. Box 958, Lenoir, NC 28645
Facility Address:
1905 Broadland Road, Lenoir, NC 28645
Permitted Flow:
6.0 MGD
Type of Waste:
Municipal (Domestic and Industrial)
Classification:
IV
Permit Status:
Renewal
County
Caldwell
Miscellaneous
Receiving Stream:
Lower Creek
' Drainage Basin
Catawba
Stream Classification:
C
Sub -basin:
03-08-31
303(d) Listed?
Yes - Benthos
HUC:
03050101
Drainage Area (mi2):
47.9 mi2
State Grid / USGS Quad:
D12NE /Lenoir
Summer 7Q10 (cfs)
11.75 cfs
Latitude:
35° 52' 55" N
Winter 7Q10 (cfs)
16.77 cfs
Longitude:
81° 34' 35" W
30Q2 (cfs)
-
Regional Office:
Asheville
Average Flow (cfs):
68 cfs
Permit Writer:
Trupti Desai
IWC (%):
44 %
Date:
10/04/2016
I SUMMARY
Lower Creek WWTP is a major municipal treatment plant operating in Caldwell County that serves an estimated
population of 22,000. The city has a separate sewer collection system. The facility processes domestic and
industrial wastewater using advanced treatment processes. The treatment system consists of bar screen, grit
removal, aeration basins, clarifiers, chlorination/dechlorination, sludge holding lagoon, aerobic digester and belt
press. The facility has a permitted flow of 6.0 MGD discharging into Lower Creek in Catawba basin. The
annual average daily flow rage ranges from 2.14 to 2.76 MGD.
The City of Lenoir has only one significant industrial user and a full-scale pretreatment program. The permitted
flow from this industry is 0.025 MGD.
II RECEIVING STREAM
This facility discharges the treated effluent to Lower Creek in the Catawba River Basin which is classified as C
in Upper Catawba Watershed - HUC 03050101. The creek was impaired for fecal coliform during the last
permit period. It is no longer impaired for fecal coliform in sub -basin 03-08-31 since 2014 according to 303d list.
However, NC 2016 draft 303d list shows that Lower Creek in this sub -basin is impaired for benthos.
Page 1 of 6

III. DATA REVIEW AND VERIFICATION OF EXISTING CONDITIONS
A. DMR Review
DMRs were reviewed for the period of January, 2013 till June, 2016. The effluent data are summarized in Table
1.
Table 1. Data Summa
Parameter
Units
Average
Max
Min
Flow
MGD
2.56
8.39
1.52
BOD
mg/1
4.22
35.0
< 2
DO
mg/1
8.57
11.3
6.3
NH3.N
mg/1
0.88
13.3
< 0.1
TSS
mg/1
7.65
200
< 2.5
pH
S.U.
6.64
8.2
6.0
Temperature
°C
18.45
27.7
2.2
Total Residual Chlorine
µg/1
23.08
50.0
< 20
Total Nitrogen
mg/1
8.62
19.54
3.13
Total Phosphorus
mg/1
1.41
9.05
0.06
Fecal Coliform
#/100 ml
81
31000
< 1
Mercury
ng/1
3.0
12
< 1
Copper
µg/1
9.39
36.0
< 1
Zinc
141
53.19
167.0
< 1
Silver
µg/1
1.33
6.0
< 1
Cyanide
41
5.67
10.0
< 5
Cadmium
µg/1
0.28
3.0
< 0.1
Nickel
µg/1
2.35
13.0
< 1
Selenium
pig/1
1.42
10.0
< 1
B. Compliance History
The compliance history from January, 2013 to June, 2016 was reviewed. The facility had received 4 violation
notices during this period. In 2013, two notices were issued for the violation of monitoring frequency for Total
Nitrogen and Total Phosphorus. Two notices for violating monthly average concentration of ammonia (NH3-N)
limit were issued in 2014 and 2015.
A compliance evaluation inspection was conducted on March 26, 2014 by the Ashville Regional Office. The
facility appeared to be well operated during the inspection. However, the facility was found to be non -compliant
with NPDES permit due to maintenance issues with grit removal, bar screen, influent pump and effluent
refrigeration unit. The facility was asked to evaluate these issues and report back to the Regional office with the
findings along with a repair timeline. The most recent inspection conducted on 19th May, 2016 reported that the
facility was compliant with the NPDES permit requirements.
C. Mercury Evaluation
A mercury evaluation was conducted in accordance with the permitting guidance developed for the
implementation of the statewide Mercury TMDL to determine the need for a limit and/or Mercury Minimization
Plan (MMP). Table 2 summarizes the available mercury data used to determine permit limit.
Page 2 of 6

Table 2. Mercury Evaluation
2013
2014
2015
2016
# of Samples
4
4
4
2
Annual Average, ng/L
4.3
2.6
1.5
3.5
Maximum Value, ng/L
3.0
12.0
2.9
4.3
TBEL, ng/L
47
WQBEL, ng/L
27.2
The annual average concentration of mercury from 2013 to 2016 showed no potential to violate the WQBEL of
27.2 ng/1 or TBEL of 47 ng/1 (See attached Mercury Evaluation Sheet). Therefore, no limit will be implemented
as per mercury TMDL guidance. However, the mercury concentrations were found above 1 ng/1 in several
samples taken during previous period. Hence, a Mercury Minimization Plan (MMP) was put into the permit.
The city is currently implementing MMP by recycling fluorescent light bulbs, replacing mercury containing
thermostats and switches with mercury free units, eliminating the use of mercury thermometers in the laboratory
and monitoring levels of mercury in influent, effluent and biosolids. It is also planning to conduct a survey in
future for non -domestic users identified as possible sources of mercury. The facility will continue to monitor for
mercury as a part of its Pretreatment Long Term Monitoring Program (LTMP).
D. Reasonable Potential Analysis (RPA)
The permittee was requested to take 5 effluent hardness samples and 5 instream hardness samples upstream of the
outfall to use the most current site specific hardness data for the Reasonable Potential Analysis. RPA was
conducted for: As, Cd, Cu, CN, Mo, Ni, Se, Ag, Zn. Based on this analysis, the following permitting actions were
proposed.
Effluent Limit with Monitoring: The following parameters will receive a water quality -based effluent limit
(WQBEL) since they demonstrated a reasonable potential to exceed applicable water quality standards/criteria:
Copper and Cadmium. The new limits calculated using the new WQSs were stringent, hence the permittee is
given a compliance schedule to identify the sources of these metals, prepare a corrective action plan and achieve
the compliance during this permit cycle.
Monitoring Only: The following parameters will receive a monitor only requirement since they did not
demonstrate reasonable potential to exceed available water quality standards/criteria, but maximum predicted
concentration was > 50% of the allowable concentration: Zinc, Cyanide and Silver.
Silver showed reasonable potential but all the samples results were below 1 µg/1 except for one sample in 2013.
Permit limit was not added for this parameter but the permittee will monitor it monthly. If Silver is detected
above 1 µg/1 during this permit cycle, effluent discharge limits will be added in the next cycle.
No Limit or Monitoring: The following parameters will not receive a limit or monitoring, since they did not
demonstrate reasonable potential to exceed applicable water quality standards/criteria and the maximum
predicted concentration was < 50% of the allowable concentration: Arsenic, Chromium, Molybdenum, Nickel
and Selenium. However, the facility will continue monitoring these metals under pretreatment LTMP.
A spreadsheet of the RPA results is attached to this Fact Sheet.
Page 3 of 6

E. Priority Pollutant Analysis
The facility had performed three priority pollutant analyses and their results were included in the permit renewal
application. No priority pollutants were detected except for Chloroform. The maximum daily concentration of
Chloroform was 8.7 µg/1 and average daily concentration was less than 5 µg/1. The National Recommended
Water Quality Criteria for human health for consumption of organism is 2000 µg/. Hence, no limit is imposed
on this parameter.
F. Aquatic Toxicity Testing
Permit holder is required to perform quarterly Whole Effluent Toxicity (WET) test using Ceroidaphnia Dubia at
an effluent concentration of 44%. Total 14 WET tests were performed from January, 2013 to May, 2016. The
facility had passed all these tests. Four second species toxicity tests were submitted with the renewal application
with the passing results.
G. Instream Monitoring
The facility conducted instream monitoring for temperature, dissolved oxygen, conductivity, total nitrogen and
total phosphorous. The upstream and downstream sample results from 2013-2016 were compared. The data
showed that the effluent from this facility had no impact on the stream quality. Monitoring of upstream hardness
was added in the permit to collect site -specific hardness data to calculate permit limitations and implement new
dissolved metal standards.
During last permit renewal, weekly effluent monitoring and monthly instream monitoring for total nitrogen and
total phosphorous were included in the permit due to impairment of Lake Rhodhiss (2010 NC 303d List). The
section of the Catawba River where the discharge occurs is within the lake's drainage area. Lake Rhodhiss was
listed as impaired for pH due to excessive algal production. To address the impairment a permitting strategy was
included in the 2010 Catawba River Basin Plan and applied to all the permits within the drainage basin. Lake
Rhodhiss was assessed in 2012 and taken off the 303(d) list. As a result of the change in the lake impairment
status effluent monitoring for total nitrogen and total phosphorous will be modified to monthly and instream
monitoring for these parameters will be eliminated.
Instream monitoring requirements for fecal coliforms were removed from the permit as the receiving stream is
not impaired for fecal coliform. The facility will continue instream monitoring for temperature, dissolved oxygen
and conductivity.
IV COMPLIANCE SCHEDULE
The permittee is required to limit copper and cadmium concentration in the effluent according to RPA. The new
limits were discussed with the permittee and a compliance schedule was prepared to achieve compliance with
total copper and total cadmium limits by August 31, 2019 (See condition A. (6)). Interim effluent limitation and
monitoring requirements were added in the permit from the period beginning on the effective date of permit and
lasting till August 31, 2009.
V. LIMITS AND MONITORING REQUIREMENTS
Existing hermit limits and recommended limits/monitoring are summarized in the table below:
Parameter
Current Limit/Condition
Change from Previous Permit
Basis for Condition/Change .
Monthly
Average
Weekly
Average
Daily _
Maximum
Flow
6.0 MGD
No Change
15A 2B .0505
BOD5 (Summer)
22.0 mg/1
33.0
mg/1
No Change
Based on a water quality model
BOD5 (Winter)
30.0 mg/l
45.0
Secondary treatment standards/40
Page 4 of 6

mg/1
CFR 133 / 15A 2B .0406
NH3-N (Summer)
2.0 mg/1
6.0 mg/1
No Change
Based on a water quality model
NH3-N (Winter)
4.6 mg/1
13.8
mg/1
TSS
30.0 mg/1
45.0
mg/1
No Change
Secondary treatment standards/40
CFR 133 / 15A 2B .0406
Fecal coliform
200/100 ml
40 /' 00
mcoliform
Instream monitoring removed
State WQ standards, 15A 2B .0200
Stream is not impaired for fecal
DO
5 mg/1
No Change
State WQ standards, 15A 2B .0200
pH
Between 6.0 and 9.0 S.U.
No Change
State WQ standards, 15A 2B .0200
Total residual
chlorine
28.0 µg/1
No Change
State WQ standards, 15A 2B .0200
Total Nitrogen
Total Phosphorus
Weekly effluent and monthly instream
monitoring
Effluent monitoring frequency
changed & instream monitoring
removed
Lake Rhodhiss was de -listed from the
303(d) list.
Copper
Monitoring only
Monitoring frequency changed
for entire permit cycle.
New limit added effective
September 1, 2019 (25.7 µg/1
monthly average, 33.0 µg//l
daily max)
RPA, Revised water quality standards
and EPA's guidelines on hardness
dependent metals, Compliance
schedule
Cadmium
4.5 µg/1
31.0 µg/1
Same limit maintained till
August 31, 2019
New limit added effective
September 1, 2019 (1.8 µg/l
monthly average, 9.9 µg/1 daily
max)
RPA, Revised water quality standards
and EPA's guidelines on hardness
dependent metals, Compliance
schedule
Silver
Monitoring only
Monitoring frequency changed
RPA, Revised water quality standards
and EPA's guidelines on hardness
dependent metals
Cyanide
11.3 µg/1
45.0 µg/1
Limit eliminated & monitoring
frequency changed
RPA, Revised water quality standards
and EPA's guidelines on hardness
dependent metals
Nickel
199 µg/1
534 µg/1
Limit and monitoring
eliminated
RPA, Revised water quality standards
and EPA's guidelines on hardness
dependent metals
Selenium
11.3 µg/1
115 µg/1
Limit and monitoring
eliminated
RPA, Revised water quality standards
and EPA's guidelines on hardness
dependent metals
Zinc
Monitoring only
No Change
RPA, Revised water quality standards
and EPA's guidelines on hardness
dependent metals
Mercury
Mercury Minimization Plan required
No Change
DWR Mercury TMDL permitting
implementation guidance
Hardness —Total as
[CaCO3 or (Ca +
Mg)]
No Monitoring
Added quarterly monitoring of
effluent and upstream hardness
Revised water quality standards for
dissolved metals and EPA's
guidelines on hardness dependent
metals
Effluent Pollutant
Scan
3 Times during the permit cycle
No Change
40 CFR 122
VI. OTHER PROPOSED CHANGES
To meet new federal regulations for electronic reporting Special Condition A. (7) has been added describing
requirements for submittal of electronic DMRs.
Page 5 of 6

VII. PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice: 10/04/2016
Permit Scheduled to Issue (tentative): 11/28/2016
VIII. STATE CONTACT INFORMATION
If you have any questions on any of the above information or on the attached permit, please contact Trupti Desai
at [phone] or [e-mail].
Copies of the following are attached to provide further information on the permit development:
• Draft permit
• RPA analysis
• Mercury analysis
• Hardness Dependent Metals Implementation Fact Sheet
NPDES Recommendation by:
Signature:51#,A ‘ Deo Date: 10/04/2016
Page 6 of 6

City of Lenoir
NC0023981
Freshwater RPA -
Qw (MGD) _
IQIOS(cfs)=
7Q10S (cfs) _
7QI OW (cfs) =
30Q2 (cfs) _
Avg. Stream Flow. QA (cfs) _
Receiving Stream
6.00
9.74
11.75
16.77
NO 30C/2 DATA
68.00
: Lower Creek HUC
95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
03050101
WWTP/WTP Class:
IWC/• @ IQI OS ^
IWC% ©7QI0S =
IWC/ @ 7QIUW -
IWC/o@30Q2=
IW%C ci-QA=
Stream Class:
Lower Creek WWTPl111
48.84453782
44.18052257
35.67318757
WA
12.03104787
C
Outfall 001
Qw=6MGD
CO5181 NED HARDNESS (me/L)
Acute = 39.62 mg/L
Chronic = 38.38 mg/L
PARAMETER
TYPE
(1)
NC STANDARDS OR EPA CRITERIA
a
°-
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
Chronic C and. iled Acme
11 a Mt. Max Prod Cw Allowable Cw
Arsenic
Arsenic
C
C
150 FW(7QI0s) 340
10 HH/WS(Qavg)
ug/L
ug/L
14 0
NO DETECTS
Acute (FW): 696.1
_
Chronic (FW): ____ __'---------_-_-----•-_-_-_-'-
339.5
Max MDL = 1
Chionic(1111): --� 83.1--------------�---
Nlax MDL I
No detects
Cadmium
NC
0.8157 R1'(7QIOsl 4.8427
ug/L.
41 3
3.810
Mutt 9.914
RP shown- apply Monthly Monitoring vdh Limit
Chronic: 1.846
1 value(s)> Allowable Cw
ChrdNum II
NC
167.2612 I°W(7QI0s) 13I9,5",
pg/L
0 0
N/A.-_---_-_---_-_-_-_-_-___-_-
Acute: 2301.9
Chronic:
Chromium Vl
NC
II FW(7QI0s) 16
pg/L
0 0
N/A
Acute: 32.8
Chronic: 24.9
Chromium, Total
NC
pg/L
2 0
Nob:: n < 9
Limited data set
NO DETECTS
Max MDL= I
No Monitoring requkod if all Total Chromium
samples are < the Chromium VI Allowable Cw
Copper
NC
I1.3676 FW(7Q10s) 16.1613
sec I.
16 12
65.52--_-_-_-_-_-_-_-_-_-_-_-_-_-
Acute: 33.09
Chronic:2 value(s)> Allowable Co.
RP shown - apply Monthly Wintering with Limit
Cyanldo
NC
5 FW(7QI0s) 22
10
us).
42 5
10.2
Acute: 45.0
--•---------------------------
No value> Allowable Cw
No RP , Predicted Max 2 50% of Allowable Cw -
apply Quarterly Monitoring
Molybdenum
NC
2000 HH(7QI0s)
ug/L
14 _
16.7
Acute: NO WQS
Chronic:._._4526.9-'-------'---'-•-'-----------
No value > Allowable Cw
No RP, Predicted Max < 50% of Allowable Cw- No
Monitoring required
Nickel
Nickel
NC
NC
53.5100 FW(7QI0s) 494.9033
25.0000 WS(7Q1Os)
KO-
pg/L
42 23
15.1
Acute(F1V): (.013.2
Chronic(FW): - 121.1
No value >_AllowableCw_
Chronic(WS): -56.6. ._.__-__.___._______._______
No value> Allowable Cw
No RP, Predicted Max < 50% of Allowable Cw- No
Monitoring required
- _
Selenium
NC
5 FW(7(110s) 56
ug/L
42 0
NO DETECTS
Acute: 114.E
__ __._ _-_._______•_._______________
Chronic: I1,3
Max MDL= 10
No detects
Sliver
NC
0.06 F W(7010s) 0.6545
ug9.
15 I
13.860
Acute: 1340
_ _ _-_-----
Chronic: 0.136
15 value(s) > Allowable Cw
RP shown but only ono sample was deducted above
1 unit in 2013
-- _ - _ -- - - - -
Quarterly monitoring only --_
Zinc
NC
182.2466 FW(7QI0s) 185.7028
ug4.
16 13
302.3
Acute: 380.2
Chronic:--No value > Allowable Cu.
No RP , Predicted Max 2 50% o1 Allowable Cw -
apply Quarterly Monitoring-_---_-_-_-_-
Page 1 of 1
RPA with Hardness data 02716, tpa
0/27/2010

Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
Table 1. Project Information
Facility Name
WWTP/WTP Class
NPDES Permit
O utfa l l
Flow, Qw (MGD)
Receiving Stream
HUC Number
Stream Class
❑CHECK IF HQW OR ORW WQS (
City of Lenoir
Lower Creek WWTP/III
NC0023981
001
6.000
Lower Creek
03050101
C
■Apply WS Hardness WQC
7Q10s (cfs)
7Q10w (cfs)
30Q2 (cfs)
QA (cfs)
1Q10s (cfs)
11.75
C,
16.77
C
68.00
C;
9.74
Effluent Hardness
Upstream Hardness
Combined Hardness Chronic
Combined Hardness Acute
Data Source(s)
53.22 mg/L (Avg)
26.64 mg/L (Avg)
38.38 mg/L
39.62 mg/L
• CHECK TO APPLY MODEL
Table 2. Parameters of Concern
Par01
Par02
Par03
Par04
Par05
Par06
Par07
Par08
Par09
Par10
Par11
Par12
Par13
Par14
Par15
Par16
Par17
Par18
Par19
Par20
Par21
Par22
Par23
Par24
Name
wos
Type
Chronic Modifier
Acute
PQL Units
Arsenic
Aquactic Life
C
150
FW
340
ug/L
Arsenic
Human Health
Water Supply
C
10
HHJWS
N/A
ug/L
Beryllium
Aquatic Life
NC
6.5
FW
65
ug/L
Cadmium
Aquatic Life
NC
0.8157
FW
4.8427
ug/L
Chlorides
Aquatic Life
NC
230
FW
mg/L
10. Chlorinated Phenolic Compounds
Water Supply
NC
1
A
ug/L
yTotal Phenolic Compounds
Aquatic Life
NC
300
A
ug/L
Chromium III
Aquatic Life
NC
167.2612
FW
1319.7533
ug/L
Chromium VI
Aquatic Life
NC
11
FW
16
pg/L
Chromium, Total
Aquatic Life
NC
N/A
FW
N/A
pg/L
Copper
Aquatic Life
NC
11.3676
FW
16.1613
ug/L
Cyanide
Aquatic Life
NC
5
FW
22
10
ug/L
Fluoride
Aquatic Life
NC
1,800
FW
ug/L
Lead
Aquatic Life
NC
4.7577
FW
126.5007
ug/L
Mercury
Aquatic Life
NC
12
FW
0.5
Molybdenum
Human Health
NC
2000
HH
ug/L
Nickel
Aquatic Life
NC
53.5100
FW
494.9033
pg/L
Nickel
Water Supply
NC
25.0000
WS
N/A
pg/L
Selenium
Aquatic Life
NC
5
FW
56
ug/L
Silver
Aquatic Life
NC
0.06
FW
0.6545
ug/L
Zinc
Aquatic Life
NC
182.2466
FW
185.7028
ug/L
RPA with Hardness data 92716, input
9/27/2016

REASONABLE POTENTIAL ANALYSIS
H1
Effluent Hardness
Date Data
6/13/2016 44.7
6/14/2016 44.6
6/15/2016 41.8
6/16/2016 62.9
6/17/2016 72.1
Use "PASTE SPECIAL
Values" then "COPY".
Maximum data points
= 58
BDL=1/2DL Results
44.7 Std Dev. 13.4858
44.6 Mean 53.2200
41.8 C.V. (default) 0.6000
62.9 n 5
72.1 10 h Per value 42.92 mg/L
Average Value 53.22 mg/L
Max. Value 72.10 mg/L
H2
Upstream Hardness
Use "PASTE SPECIAL
Values" then "COPY" .
Maximum data points
= 58
Date Data BDL=1l2DL Results
1 6/13/2016 23.4 23.4 Std Dev. 7.1220
2 6/14/2016 20.8 20.8 Mean 26.6400
3 6/15/2016 38.7 38.7 C.V. (default) 0.6000
4 6/16/2016 23.1 23.1 n 5
5 6/17/2016 27.2 27.2 10th Per value 21.72 mg/L
6 Average Value 26.64 mg/L
7 Max. Value 38.70 mg/L
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
-1-
RPA with Hardness data 92716, data
9/27/2016

REASONABLE POTENTIAL ANALYSIS
Par01 & Par02
Arsenic
Date Data BDL=1/2DL Results
1 2/12/2013 < 1 0.5 Std Dev.
2 4/2/2013 < 1 0.5 Mean
3 8/13/2013 < 1 0.5 C.V.
4 11/12/2013 < 1 0.5 n
5 2/11/2014 < 1 0.5
6 5/13/2014 < 1 0.5
7 8/12/2014 < 1 0.5
8 11/4/2014 < 1 0.5
9 2/10/2015 < 1 0.5
10 5/12/2015 < 1 0.5
11 8/11/2015 < 1 0.5
12 11/10/2015 < 1 0.5
13 2/9/2016 < 1 0.5
14 5/10/2016 < 1 0.5
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIALPar04
Values" then "COPY" .
Maximum data points
= 58
0.0000
0.5000
0.0000
14
Mult Factor = 1.00
Max. Value 0.5 ug/L
Max. Pred Cw 0 DETECTS ug/L
Cadmium
Date Data BDL=1/2DL Results
1 1/2/2013 < 0.2 0.1 Std Dev.
2 2/12/2013 < 0.2 0.1 Mean
3 4/2/2013 < 0.2 0.1 C.V.
4 5/14/2013 < 0.2 0.1 n
5 6/18/2013 < 0.2 0.1
6 7/23/2013 < 0.2 0.1 Mult Factor =
7 8/13/2013 < 0.2 0.1 Max. Value
8 9/17/2013 < 0.1 0.05 Max. Pred Cw
9 10/15/2013 < 0.2 0.1
10 11/12/2013 < 0.2 0.1
11 12/23/2013 < 0.2 0.1
12 1/14/2014 < 0.2 0.1
13 2/11/2014 < 0.2 0.1
14 3/11/2014 < 0.2 0.1
15 4/8/2014 < 0.2 0.1
16 5/13/2014 < 0.2 0.1
17 6/17/2014 < 0.2 0.1
18 7/22/2014 < 0.2 0.1
19 8/12/2014 < 0.2 0.1
20 9/23/2014 < 0.2 0.1
21 10/14/2014 < 0.2 0.1
22 11/4/2014 < 0.2 0.1
23 12/9/2014 < 0.2 0.1
24 1/6/2015 0.2 0.2
25 2/10/2015 < 0.2 0.1
26 3/3/2015 < 0.2 0.1
27 5/12/2015 3 3
28 6/2/2015 < 0.2 0.1
29 6/9/2015 < 0.2 0.1
30 7/9/2015 < 0.2 0.1
31 8/11/2015 < 0.2 0.1
32 9/15/2015 < 0.2 0.1
33 10/13/2015 < 0.2 0.1
34 11/10/2015 < 0.2 0.1
35 12/15/2015 < 0.2 0.1
36 1/5/2016 < 0.2 0.1
37 2/9/1916 < 0.2 0.1
38 3/2/1916 < 0.2 0.1
39 4/5/1916 < 0.2 0.1
40 5/10/1916 < 0.2 0.1
41 6/14/1916 0.6 0.6
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL
Values" then "COPY" .
Maximum data points
=58
0.4578
0.1841
2.4859
41
1.27
3.000 ug/L
3.810 ug/L
RPA with Hardness data 92716, data
- 2 - 9/27/2016

REASONABLE POTENTIAL ANALYSIS
Par10
Chromium, Total
Date Data BDL=1/2DL Results
1 2/9/1916 < 1 0.5 Std Dev.
2 5/10/1916 < 1 0.5 Mean
3 C.V.
4 n
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use"PASTE SPECIAL
Values" then "COPY".
Maximum data points
= 58
Pall
Copper
0.0000
0.5000
0.0000
2
Mutt Factor = 1.00
Max. Value 0.5 ug/L
Max. Pred Cw 0 DETECTS pg/L
Date ^.*.
1 1/2/2013 36
2 2/12/2013 < 1
3 4/2/2013 10
4 5/14/2013 19
5 8/13/2013 8
6 11/12/2013 6
7 2/11/2014 4
8 5/13/2014 13
9 8/12/2014 9
10 11/4/2014 30
11 2/10/2015 7
12 5/12/2015 6
13 8/11/2015 < 1
14 11/10/2015 < 1
15 2/9/1916 8
16 5/10/1916 < 1
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
BDL=112DL Results
36 Std Dev.
0.5 Mean
10 C.V.
19 n
8
6 Mull Factor =
4 Max. Value
13 Max. Pred Cw
9
30
7
6
0.5
0.5
8
0.5
Use"PASTE SPECIAL
Values" then "COPY".
Maximum data points
=58
10.3690
9.8750
1.0500
16
1.82
36.00 ug/L
65.52 ug/L
-3-
RPA with Hardness data 92716, data
9/27/2016

REASONABLE POTENTIAL ANALYSIS
Par12
Cyanide
Date Data BDL=1/20L Results
1 1/2/2013 < 5 5 Std Dev.
2 2/12/2013 < 5 5 Mean
3 3/5/2013 5 5 C.V.
4 4/2/2013 < 5 5 n
5 6/18/2013 < 5 5
6 6/25/2013 < 5 5 Mult Factor =
7 7/23/2013 10 10 Max. Value
8 8/13/2013 < 5 5 Max. Pred Cw
9 9/17/2013 < 5 5
10 10/15/2013 5 5
11 11/12/2013 6 5
12 12/23/2013 6 5
13 1/14/2014 6 5
14 2/11/2014 5 5
15 3/11/2014 < 5 5
16 4/8/2014 < 5 5
17 5/13/2014 5 5
18 6/17/2014 7 5
19 7/22/2014 < 5 5
20 8/12/2014 6 5
21 9/23/2014 < 5 5
22 10/14/2014 5 5
23 11/4/2014 7 5
24 12/9/2014 8 5
25 1/6/2015 5 5
26 2/10/2015 < 5 5
27 3/3/2015 5 5
28 5/12/2015 < 5 5
29 6/2/2015 < 5 5
30 6/9/2015 6 5
31 7/9/2015 8 5
32 8/11/2015 < 5 5
33 9/15/2015 < 5 5
34 10/13/2015 8 5
35 11/10/2015 < 5 5
36 12/15/2015 6 5
37 1/5/2016 6 5
38 2/9/2016 < 5 5
39 3/2/1916 5 5
40 4/5/1916 < 5 5
41 5/10/1916 6 5
42 6/14/1916 7 5
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL.
Values.' then "COPY"
Maximum data points
=58
Par16
Molybdenum
0.7715
5.12
0.1507
42
1.02
10.0 ug/L
10.2 ug/L
Date Data BDL=1/2DL Results
1 2/12/2013 < 1 0.5 Std Dev.
2 4/2/2013 < 1 0.5 Mean
3 8/13/2013 < 1 0.5 C.V.
4 11/12/2013 < 1 0.5 n
5 2/11/2014 < 1 0.5
6 5/13/2014 < 1 0.5 Mult Factor =
7 8/12/2014 < 1 0.5 Max. Value
8 11/4/2014 3 3 Max. Pred Cw
9 2/10/2015 < 1 0.5
10 5/12/2015 7 7
11 8/11/2015 < 1 0.5
12 11/10/2015 < 1 0.5
13 2/9/2016 < 1 0.5
14 5/10/2016 < 1 0.5
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use"PASTE SPECIAL
Values" then "COPY" .
Maximum data points
= 58
1.8127
1.1429
1.5861
14
2.39
7,0 ug/L
16.7 ug/L
RPA with Hardness data 92716. data
- 4 - 9/27/2016

REASONABLE POTENTIAL ANALYSIS
Par17 & Par18
Nickel
Date Data BDL=1/2DL Results
1 1/15/2013 < 1 0.5 Std Dev.
2 2/12/2013 < 1 0.5 Mean
3 3/5/2013 1 1 C.V.
4 4/2/2013 < 1 0.5 n
5 5/14/2013 2 2
6 6/18/2013 6 6 Mult Factor =
7 7/23/2013 2 2 Max. Value
8 8/13/2013 5 5 Max. Pred Cw
9 9/17/2013 4.6 4.6
10 10/15/2013 3 3
11 11/12/2013 < 1 0.5
12 12/23/2013 3 3
13 1/14/2014 1 1
14 2/11/2014 3 3
15 3/11/2014 < 1 0.5
16 4/8/2014 1 1
17 5/13/2014 3 3
18 6/17/2014 5 5
19 7/22/2014 < 1 0.5
20 8/12/2014 < 1 0.5
21 9/23/2014 3 3
22 10/14/2014 < 1 0.5
23 11/4/2014 < 1 0.5
24 12/9/2014 1 1
25 1/6/2015 2 2
26 2/10/2015 < 1 0.5
27 3/3/2015 < 1 0.5
28 5/12/2015 3 3
29 6/2/2015 1 1
30 6/9/2015 4 4
31 7/9/2015 < 1 0.5
32 8/11/2015 < 1 0.5
33 9/15/2015 4 4
34 10/13/2015 < 1 0.5
35 11/10/2015 < 1 0.5
36 12/15/2015 13 13
37 1/5/2016 4 4
38 2/9/2016 < 1 0.5
39 3/2/2016 < 1 0.5
40 4/5/2016 5 5
41 5/10/2016 < 1 0.5
42 6/14/2016 < 1 0.5
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use"PASTE SPECIAL
Values" then "COPY".
Maximum data points
= 58
Par19
Selenium
2.3986
2.1214
1.1307
42
1.16
13.0 pg/L
15.1 pg/L
Date Data
1/15/2013 < 10
2/12/2013 < 1
3/5/2013 < 1
4/2/2013 < 1
5/14/2013 < 1
6/18/2013 < 10
7/23/2013 < 1
8/13/2013 < 1
9/17/2013 < 1
10/15/2013 < 1
11/12/2013 < 1
12/23/2013 < 1
1/14/2014 < 1
2/11/2014 < 1
3/11/2014 < 1
4/8/2014 < 1
5/13/2014 < 1
6/17/2014 < 1
7/22/2014 < 1
8/12/2014 < 1
9/24/2014 < 1
10/14/2014 < 1
11/4/2014 < 1
12/9/2014 < 1
1/6/2015 < 1
2/10/2015 < 1
3/3/2015 < 1
5/12/2015 < 1
6/3/2015 < 1
6/9/2015 < 1
7/9/2015 < 1
8/11/2015 < 1
9/15/2015 < 1
10/29/2015 < 1
11/10/2015 < 1
12/15/2015 < 1
1/5/2016 < 1
2/9/2016 < 1
3/2/1916 < 1
4/5/1916 < 1
5/10/1916 < 1
6/14/1916 < 1
BDL=1/2DL Results
5 Std Dev.
0.5 Mean
0.5 C.V.
0.5 n
0.5
5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
Use "PASTE SPECIAL -
Values" then "COPY".
Maximum data points
= 58
0.9699
0.7143
1.3579
42
Mult Factor = 1.18
Max. Value 5.0 ug/L
Max. Pred Cw 0 DETECTS ug/L
-5-
RPA with Hardness data 92716, data
9/27/2016

REASONABLE POTENTIAL ANALYSIS
Par20
Silver
Date Data BDL=1/2DL Results
1 2/12/2013 < 1 0.5 Std Dev.
2 4/2/2013 < 1 0.5 Mean
3 5/14/2013 6 6 C.V.
4 8/13/2013 < 1 0.5 n
5 11/12/2013 < 1 0.5
6 2/11/2014 < 1 0.5 Mult Factor =
7 5/13/2014 < 1 0.5 Max. Value
8 8/12/2014 < 1 0.5 Max. Pred Cw
9 11/4/2014 < 1 0.5
10 2/10/2015 < 1 0.5
11 5/12/2015 < 1 0.5
12 8/11/2015 < 1 0.5
13 11/10/2015 < 1 0.5
14 2/9/1916 < 1 0.5
15 4/10/1916 < 1 0.5
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use"PASTE SPECIAL
Values" then "COPY" .
Maximum data points
_58
Par21
Zinc
1.4201
0.8667
1.6386
15
2.31
6.000 ug/L
13.860 ug/L
Date Data BDL=1/2DL Results
1 1/2/2013 136 136 Std Dev.
2 2/12/2013 60 60 Mean
3 4/2/2013 < 1 0.5 C.V.
4 5/14/2013 6 6 n
5 8/13/2013 < 1 0.5
6 11/12/2013 9 9 MultFactor =
7 2/11/2014 22 22 Max. Value
8 5/13/2014 167 167 Max. Pred Cw
9 8/12/2014 48 48
10 11/4/2014 154 154
11 2/10/2015 62 62
12 5/12/2015 29 29
13 8/11/2015 < 1 0.5
14 11/10/2015 47 47
15 2/9/2016 32 32
16 5/10/2016 76 76
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Use "PASTE SPECIAL.
Values" then "COPY" .
Maximum data points
=58
54.8924
53.0938
1.0339
16
1.81
167.0 ug/L
302.3 ug/L
RPA with Hardness data 92716, data
- 6 - 9/27/2016

9/27/16 WQS = 12 ng/L
Facility Name: Lower Creek WWTP
Total Mercury 1631E PQL = 0.5 ng/L
Date Modifier Data Entry Value
1
12
3.8
0.5
3
1.4
2.8
3
0.5
0.5
2.2
2.9
4.3
2.6
2/12/13
4/2/13
8/13/13
11/12/13
2/11/14
5/13/14
8/12/14
11/4/14
2/10/15
5/12/15
8/11/15
11/10/15
2/9/16
5/10/16
1
12
3.8
1
3
1.4
2.8
3
1
1
2.2
2.9
4.3
2.6
MERCURY WQBEL/TBEL EVALUATION V:2013-5
No Limit Required
MMP Required
7Q10s = 11.750 cfs
Permitted Flow = 6.000
WQBEL =
27.16 ng/L
47 ng/L
4.3 ng/L - Annual Average for 2013
2.6 ng/L - Annual Average for 2014
1.5 ng/L - Annual Average for 2015
3.5 ng/L - Annual Average for 2016

Desai, Trupti A
From: Wall, Monte L. <[e-mail]>
Sent: Wednesday, September 21, 2016 11:10 AM
To: Desai, Trupti A
Cc: Thomas, Radford L
Subject: RE: NPDES Permit # NC0023981 Renewal
Ms. Desai,
Yes, I had forgotten Greer Labs is our only SIU. We do monitor them for various organic
parameters, as well as some metals, including Copper; we will probably go ahead and monitor
for Cadmium.
August 31, 2019 works for us for the final compliance date.
Thanks,
Monte L. Wall
Superintendent Wastewater Treatment
City of Lenoir
P.O. Box 958
Lenoir, NC 28645
Phone: [phone]
Fax: [phone]
[e-mail]
From: Desai, Trupti A [mailto:[e-mail]]
Sent: Wednesday, September 21, 2016 10:55 AM
To: Wall, Monte L.
Cc: Thomas, Radford L
Subject: RE: NPDES Permit # NC0023981 Renewal
Mr. Wall,
Thanks for your reply. PERC Unit still has one pharmaceutical industry discharging to Lower Creek WWTP on their
files. You may want to give them a call (Sarah Bass Tel. [phone]) and update this information.
1

Regarding the date by which the facility should meet the proposed limits, I would suggest August 31, 2019. Do you think •
that will work for your facility ? Please confirm this date or suggest an alternate date by Monday 9/26/2016.
Thank you.
Trupti Desai
From: Wall, Monte L. Imailto:[e-mail]]
Sent: Wednesday, September 21, 2016 9:30 AM
To: Desai, Trupti A <[e-mail]>
Cc: Thomas, Radford L <[e-mail]>
Subject: RE: NPDES Permit # NC0023981 Renewal
Ms. Desai,
Thank you for eliminating the Silver limit, and for the establishment of interim limits /
monitoring for Cadmium and Copper. We currently have no SIUs on the collection system, but
will begin to monitor various portions ASAP, if necessary. I am aware that the Cd/Cu limits
must be met before Feb. 29, 2020, but am not sure of an exact date that the compliance will
be attained. Perhaps a year or so before expiration would be good, but whatever date that is
reasonable will be fine.
Monte L. Wall
Superintendent Wastewater Treatment
City of Lenoir
P.O. Box 958
Lenoir, NC 28645
Phone: [phone]
Fax: [phone]
[e-mail]
From: Desai, Trupti A[mailto:[e-mail]
Sent: Wednesday, September 21, 2016 8:49 AM
To: Wall, Monte L.
Cc: Thomas, Radford L
Subject: RE: NPDES Permit # NC0023981 Renewal
Mr. Wall,
2

I hope you had a chance to go through the proposed changes to the permit (Please see the email below sent on
- 8/3/16). Do you have any questions or concerns regarding the interim or proposed limits? Do you have a date in mind
by which the Lower Creek WWTP can meet the proposed limits after taking necessary actions?
Thanks.
Trupti Desai
From: Desai, Trupti A
Sent: Wednesday, August 03, 2016 1:03 PM
To: 'Wall, Monte L.' <[e-mail]>
Cc: Thomas, Radford L <[e-mail]>
Subject: RE: NPDES Permit # NC0023981 Renewal
Mr. Wall,
Following changes are made to the draft permit limitation and monitoring requirements for Lower Creek WWTP.
• Silver limits are eliminated from the draft permit as it was detected below 1 ug/I in all the samples except for
one (6.0 mg/I) in 2013. However, the facility still needs to monitor it quarterly. There will be a limit in the next
permit if silver is detected above 1 ug/I. (See attached document Diss. Metal Implementation Fact Sheet for new
water quality standards and limit calculation procedure).
• Copper and cadmium limits are not changed as the hits above the proposed limits were observed in 2015. We
are providing interim limits and monitoring requirements (See attached table in A.(1) Effluent Limitations and
Monitoring Requirements) during the permit period till the date (before permit expires) the facility achieves
compliance with total copper and total cadmium limits by following the compliance schedule.
• The proposed permit limits and monitoring are shown in A.(2). The compliance schedule is updated to include
some activities to identify sources of copper and cadmium, prepare corrective action plan and implementation
of this plan to achieve compliance. Since you have only one hit above the limits for these metals, it should not
be difficult to find potential sources and eliminate them or reduce the metal concentration in the effluent. You
will have 2 years to determine if the facility needs corrective actions or not. If these metals are not detected
after two years of monitoring, you can request the DWR to modify the permit limits. The Division will conduct
the reasonable potential analysis and determine the new limits or eliminate the limits.
Please review the attached documents and let me know if you have any questions. If you agree with the interim and
proposed limits and compliance schedule, please provide me the date by which the facility can achieve compliance
before the new permit expires on February 29, 2020. Proposed effluent limitations and monitoring requirements will
become enforceable after this date. Please note that we may modify these interim and proposed limits and monitoring
requirements if EPA does not agree with them.
I have attached a document (Diss. Metal Implementation Fact Sheet) to show you how we are implementing new WQS
and calculating the limits (See table 1 & 2). The new WQS are more stringent and reasonable potential analysis now uses
hardness data to calculate total metals limit. This is the main reason why major NPDES facilities with pretreatment are
getting stringent limits.
Thanks.
Trupti Desai
3

From: Wall, Monte L. [mailto:[e-mail]]
Sent: Monday, August 01, 2016 10:57 AM
To: Desai, Trupti A <[e-mail]>
Cc: Thomas, Radford L <[e-mail]>
Subject: RE: NPDES Permit # NC0023981 Renewal
Ms. Desai,
Thank you for getting back in touch with Mr. Thomas and me. I have discussed several
concerns with the proposed limitations for the Lower Creek WWTP effluent.
I looked at data from the past three years. For the parameter Copper, there were 12 analyses
performed, with one being over the proposed monthly average limit. For the parameter
Cadmium, there were 37 analyses performed, with one being over the proposed monthly
average limit. For the parameter Silver, there were 12 analyses performed, with none being
over the proposed monthly average limit. There were no instances for any of the parameters
exceeding the proposed daily maximum limit.
The proposed monthly average limit for Silver (0.13 µg/I) is well below the laboratory
detection limit of 1.0 µg/I. Footnote #8 indicates that if any Silver is detected, that would be a
permit limit violation. The limits for Copper and Cadmium are uncomfortably close to what we
have been attaining.
Currently, there are no active Sills on the Lower Creek WWTP collection system. We do
monitor other industries to ensure their compliance with SUO limits; we can add Copper,
Cadmium and Silver to the monitoring parameters in an attempt to narrow down any
sources. Also we can monitor various points within the collection system to see if there is a
consistent contribution from any particular area(s).
I was wondering if the limits were determined from our data, or actual stream
modeling. Could you possibly provide us an explanation of the derivation of the proposed
limits?
Thank you,
Monte L. Wall
Superintendent Wastewater Treatment
City of Lenoir
4

P.O. Box 958
- Lenoir, NC 28645
Phone: [phone]
Fax: [phone]
[e-mail]
From: Desai, Trupti A[mailto:[e-mail]]
Sent: Monday, August 01, 2016 8:39 AM
To: Thomas, Radford L
Cc: Wall, Monte L.
Subject: RE: NPDES Permit # NC0023981 Renewal
Dear Mr. Thomas,
This has reference to my email dated July 12, 2016. 1 was just wondering if you had a chance to review the compliance
schedule and permit limits. Please let me know if you have any questions.
Thanks.
Trupti Desai
From: Desai, Trupti A
Sent: Tuesday, July 12, 2016 4:02 PM
To: '[e-mail]' <[e-mail]>
Cc: 'Wall, Monte L.' <[e-mail]>
Subject: NPDES Permit # NC0023981 Renewal
Importance: High
Dear Mr. Thomas,
Thank you very much for providing effluent and upstream hardness data to calculate permit limitations for hardness
dependent metals. A reasonable potential analysis was conducted and permit limitations were calculated for the metals
(See attached).
The pen -nit changes for the hardness dependent metals are as follows:
• Copper and Silver — Added limit and changed monitoring frequency
• Cadmium - Changes in permit limit
• Cyanide — Removed limit and changed monitoring frequency
• Nickel and Selenium — Limit and Monitoring Eliminated
The Division of Water Resources understands that it might be difficult for the Lower Creek WWTP to comply with these
new Water Quality Based Effluent Limits (WQBELs) upon the effective date of the permit. Therefore, a special condition
describing a compliance schedule (See attached) has been added to your draft permit to consider this situation and
evaluate the options to stay in compliance with the NPDES permit requirements.
Please review and comment on the compliance schedule and perniit limitation. Also, let me know the date (highlighted in
attached document) by which the facility can comply with the dissolved metals limitations. Please note that these are
5

draft documents which might be edited before the public notice is issued for the draft permit. The public notice for this
permit will be issued if we do not hear back from you in 30 days.
Thanks.
Sincerely,
Trupti Desai
Engineer
NPDES Complex Permitting Unit
Division of Water Resources
North Carolina Department of Environmental Quality
919 807 6351 (office)
trupti.desai(a ncdenr.gov
512 North Salisbury St.,Raleigh, NC, 27604
1617 Mail Service Center, Raleigh, NC, 27699-1617
Nothing Compares
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
6

Desai, Trupti A
From: Wall, Monte L. <[e-mail]>
Sent: Monday, July 11, 2016 1:59 PM
To: Desai, Trupti A
Subject: RE: NPDES permit 1t NC0023981
Ms.Desai,
I just received those results, and they are summarized below:
Lower Creek WWTP Effluent
6/13/16 44.7 mg/I
6/14/16 44.6
6/15/16 41.8
6/16/16 62.9
6/17/16 72.1
Average: 53.2 mg/I
Lower Creek Upstream
6/13/16 23.4 mg/I
6/14/16 20.8
6/15/16 38.7
6/16/16 23.1
6/17/16 27.2
Average: 26.6 mg/I
Let me know if you need anything else.
Thank you!
Monte L. Wall
Superintendent Wastewater Treatment
City of Lenoir

City of Lenoir
Public Utilities Department
P.O. Box 958
Lenoir, North Carolina 28645,
August 21, 2014
Mr. Tom Belnick
NC DENR / Division of Water Quality
NPDES Unit Supervisor
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Permit Renewal Request for the City of Lenoir
Creek WWTP (Permit # NC0023981)
Dear Mr. Belnick:
RECEIVED/DENRJDWR
AUG. 282014
Water Quatity
Permitting Section
— Lower
The City of Lenoir would like to request renewal of the NPDES wastewater
discharge permit for the Lower Creek WWTP (Permit # NC0023981). The
current permit expires on February 28, 2015.
There have been no major changes at the facility since issuance of the last
permit.
In the application, only the last one -and -one-half year's toxicity testing is
included. Below is a summary of all toxicity tests from January 2010 —
June 2014:
DATE
TEST
RESULT
DATE
TEST
RESULT
02/11/2010
Ceriodaphnia, 44%
Invalid Test
05/15/2012
Ceriodaphnia, 44%
PASS
02/23/2010
Ceriodaphnia, 44%
PASS
08/14/2012
Ceriodaphnia, 44%
PASS
05/13/2010
Ceriodaphnia, 44%
PASS
11/13/2012
Ceriodaphnia, 44%
PASS
08/12/2010
Ceriodaphnia, 44%
PASS
02/12/2013
Ceriodaphnia, 44%
PASS
11/16/2010
Ceriodaphnia, 44%
FAIL
05/14/2013
Ceriodaphnia, 44%
PASS
12/07/2010
Ceriodaphnia, ph II
>100% ChV
08/13/2013
Ceriodaphnia, 44%
PASS
02/15/2011
Ceriodaphnia, 44%
PASS
11/12/2013
Ceriodaphnia, 44%
PASS
02/22/2011
Ceriodaphnia, ph II
>100% ChV
11/19/2013
Fathead Minnow
>100% ChV
05/17/2011
Ceriodaphnia, 44%
PASS
01/13/2014
Fathead Minnow
>100% ChV
06/14/2011
Ceriodaphnia, 44%
PASS
02/11/2014
Ceriodaphnia, 44%
PASS
08/16/2011
Ceriodaphnia, 44%
PASS
04/01/2014
Fathead Minnow
>100% ChV
11/15/2011
Ceriodaphnia, 44%
PASS
05/13/2014
Ceriodaphnia, 44%
PASS
02/14/2012
Ceriodaphnia, 44%
PASS
05/20/2014
Fathead Minnow
>100% ChV

The cause of the November 2010 toxicity failure is unknown. Both of the
follow-up multi -concentration Phase II testing showed results >100% ChV.
The January 2011 sampling was accidentally missed, but was done in
February 2011.
Enclosed:(are two (2) copies of the original application, as well as a
description of the plant processes, flow diagram, topographic map,
overhead view at 200', and an overhead view at 100' (with treatment units
labeled). If you require any additional information, please call me at 828-
757-2198, or email me at mlwall©ci.lenoir.nc.us.
Thank you for your assistance.
Sincerely,
Monte L. Wall
Superintendent Wastewater Treatment
City of Lenoir
cc: Radford Thomas, City of Lenoir Director of Public Utilities

CITY OF LENOIR - LOWER CREEK WASTEWATER
TREATMENT PLANT
The Lower Creek Wastewater Treatment Plant currently treats, on average, about 2.4
MGD, or at 40% of its permitted capacity (6.0 MGD). The process consists of a
mechanical filter screen, two 3-MGD capacity and two 6-MGD capacity influent pumps.
Grit removal, using two cyclonic "teacups", occurs after the pumps. The biological
nutrient removal (BNR) process is the Kruger A20, consisting of anaerobic, anoxic and
oxic treatment. The anaerobic basins convert phosphorous to a more treatable form.
The mixed wastewater moves into the first of two anoxic zones (in series), where
nitrogen removal takes place. From there it flows into two oxic zones (or aeration),
where centrifugal blowers (total of three 150-HP available) provide air. At the end of the
oxic zones, some of the aerated wastewater is pumped back to the anoxic zones for
nutrient removal. After settling in two one -million gallon clarifiers, the effluent is treated
with chlorine gas for disinfection (at discharge of clarifiers) and sulfur dioxide gas for de -
chlorination (near end of chlorine contact tank). The final effluent is discharged into
Lower Creek.
Return sludge is pumped back to the anaerobic basin. Wasted sludge is pumped into
the sludge holding tank, which acts as a feed tank to the biosolids treatment. The
sludge is pressed out for thickening (belt press), and fed into the RDP lime stabilization
and pasteurization system, producing a Class A biosolids, which is given away or
distributed on farmlands.
The last rebuild of the plant was completed in 1998. Prior to then, the WWTP had
compliance problems, primarily with the ammonia limit. Our current effluent limits and
results are:
PARAMETER
SUMMER,
MONTHLY
AVG. (mg/I)
WINTER
MONTHLY
AVG. (mg/I)
SUMMER,
WEEKLY
AVG.
(mg/I)
WINTER
WEEKLY
AVG.
(mg/l)
EFFLUENT
ANNUAL
AVERAGE
(2013-2014)
WWTP
REMOVAL
BOD5
22
30
33
45
2.8
98.9 %
TSS
30
30
45
45
7.8
97.3 %
Ammonia
2.0
4.6
6.0
13.8
0.84
97.0 %
TKN *
—
—
—
—
3.16
85.5 %
Total N *
---
—
—
—
8.17
N/A
Total P ***
—
—
—
—
0.64
85.7 %
* Effluent goal is TKN and Total Nitrogen of <10 mg/I.
** Effluent goal is Total Phosphorous of <2 mg/I.

H. WWTP Diagram
City of Lenoir Lower Creek WWTP
Headworks Long Term Monitoring Plan
LOWER CREEK WWTP DIAGRAM
Influent
Grit
Removal
Filter Screen
Biosolids Wash and
Beltpress Return
Emergency Generator
Return
Anaerobic and Activated
Anoxic Zones Sludge
Effluent
Internal
Recycle
N A
i
Clarifiers
(2)
Chlorine
Disinfect ,--
SO2
Dechlorination
1
Emergency
Generator
Sludge
Gunpowder
Plant Sludge
Class "A"
Biosolids
Treatment
CD
Sludge
to
Disposal
ludge
Holding
Water Plant
Sludge
Sludge Dumping Pit
1
Sampling Points
1 - Influent
2 — Effluent (After Chlorination and
Dechlorination)
3 — Activated Sludge Basins
4 — Sludge to Disposal
File Lenoir_Lower Creek_LTMP_Oct 2004
Printed: ,
Modeled after: Chapter 4, Appendix 4-A. DWQ Model Revision Date: July 29, 2004
Page 4

lQ058mmd|andRd, Lenoir, NC28h4S
Street View - Search nearby
-

GRIT REMOVAL
CHLORINE CONTACT
CLARIFIERS
BIOSOLIDS STORAGE
FILTER SCREEN
EMERGENCY GENERATOR
Is02 STORAGE
!ABANDONED BASIN
1905 Broadland Rd
EMERGENCY GENERATOR
I SLUDGE HOLDING TANK
BLOWER BUILDING
Imagery ©2014 Google, Map data ©2014 Google 100 ft

NPDES/Aquifer Protection Permitting Unit Pretreatment Information Request Form
PERMIT WRITER COMPLETES THIS PART:
PERMIT WRITERS - AFTER you get this form back
Check that
f
from PERCS:
all apply
Notify PERCS if LTMP/STMP data we said should be
Date of Request
3/11/2016
municipal renewal
on DMRs is not really there, so we can get it for you
Requestor
Trupti Desai
new industries
(or NOV POTW).
Facility Name
City of Lenoir
WWTP expansion
- Notify PERCS if you want us to keep a specific POC
Permit Number
NC0023981
Speculative limits
in LTMP/STMP so you will have data for next permit
Region
Asheville
stream reclass.
renewal.
- Email PERCS draft permit, fact sheet, RPA.
Basin
Catawba
outfall relocation
- Send PERCS paper copy of permit (w/o NPDES
7Q10 change
boilerplate), cover letter, final fact sheet. Email RPA if
other
changes.
other
check
applicable PERCS staff:
Other Comments to PERCS:
x
BRD, CPF, CTB, FRB, TAR - Sarah Morrison (807-6310)
CHO, HIW, LUM, LTN, NES, NEW, ROA, YAD - Monti
Hassan (807-6314)
PERCS
PRETREATMENT STAFF COMPLETES THIS PART:
Status
of Pretreatment Program (check all that apply)
1) facility has no SIU's, does have Division approved Pretreatment Program that is INACTIVE
2) facility has no SIU's, does not have Division approved Pretreatment Program
J
3) facility has Sills and DWQ approved Pretreatment Program (list "DEV" if program still under development)
J
3a) Full Program with LTMP
3b) Modified Program with STMP
4) additional conditions regarding Pretreatment attached or listed below
Flow, MGD
Permitted
Actual
Time period for Actual
STMP time frame:
Industrial
0.175
0.0719
10/1/2008-9/30/2011
Most recent:
Uncontrollable
n/a
2.5284
10/1/2008-9/30/2011
Next Cycle:
POC in LTMPI
STMP
Parameter of
Concern (POC)
Check List
POC due to
NPDES/ Non-
Disch Permit
Limit
Required by
EPA"
Required
by 503
Sludge"
POC due
to SIU"'
POTW POC
(Explain
below)""""
STMP
Effluent
Freq
LTMP
Effluent
Freq
4
BOD
J
J
Q
\I
TSS
J
J
Q
Q = Quarterly
\I
NH3
J
Q
M = Monthly
J
Arsenic
J
Q
J
Cadmium
J
J
Q
J
Chromium
J
J
Q
J
Copper
J
J
Q
J
Cyanide
Q
Is all data on DMRs?
J
Lead
J
J
J
Q
YES
'J
J
Mercury
J
Q
NO (attach data)
J
Molybdenum
J
Q
J
Nickel
J
J
Q
Silver
J
Selenium
J
J
Q
J
Zinc
J
J
Q
is data In spreadsheet?
Total Nitrogen
YES (email to writer)
i
J
Phosphorus
Q
NO
J
TKN
Q
"Always in the LTMP/STMP **Only in LTMP/STMP if sludge land app or composte (dif POCs for incinerators)
***Only in LTMP/STMP while SIU still discharges to POTW **" Only in LTMP/STMP when pollutant is still of concern to POTW
Comments to Permit Writer (ex., explanation of any POCs; info you have on IU related investigations into NPDES problems):
0023981 Pretreatment request form
Revised: July 24, 2007

City of Lenoir
Public Utilities Department
Lower Creek WWTP
P.O. Box 958
Lenoir, North Carolina 28645
April 6, 2016
Mr. Tom Belnick
NC DENR / Division of Water Quality
NPDES Unit Supervisor
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Summary of Mercury Minimization Plan Activities; Addendum to
Lower Creek VVWTP (Permit # NC0023981) Application.
Dear Mr. Belnick:
The City of Lenoir would like to submit this summary of MMP activities for
the Lower Creek WWTP (Permit # NC0023981). The current permit
expired on February 28, 2015.
Below is a summary of MMP activities:
• Recycled fluorescent bulbs and CFLs.
• Replaced mercury containing thermostats and switches with mercury
free units.
• Laboratory has eliminated the use of mercury thermometers.
• Monitored the mercury in various locations within the WWTP:
Effluent is monitored quarterly (Hg 1631 method); Influent is
monitored quarterly; Plant biosolids product is monitored per permit,
which is generally quarterly.
• Monitored mercury for every significant industrial user (SIU) on an
annual basis.

• Currently, no surveys have been done for non -domestic users
identified as possible sources of mercury, but this will be done in a
way to make up for the 10% annual survey frequency.
Through monitoring, it has been found that there has been a 98.8%
mercury removal, from the already low levels found in the plant influent.
The maximum influent value seen over the past three years has been 0.4
pgll. The maximum effluent value seen over the past three years has been
4.3 ng/l, well below the 12 ng/l standard. All biosolids results have been
well below the 17 mg/kg monthly average permit limit.
If you require any additional information, please call me at 828-757-2198,
or email me at [e-mail].
Thank you for your assistance.
Sincerely,
Monte L. Wall
Superintendent Wastewater Treatment
City of Lenoir

LOWER CREEK WWTP MERCURY DATA
Hg-Influent Hg -Effluent
8/13/2013 0 0.0038 0.0038
9/9/2013 0.3 0.3 0
11/12/2013 < 0.1 0.05 < 0.001 0.0005
2/10/2014 < 1.0 0.5 0
2/11/2014 0 0.003 0.003
5/12/2014 < 0.1 0.05 0
5/13/2014 0 0.0014 0.0014
8/11/2014 < 0.1 0.05 0
8/12/2014 0 0.0028 0.0028
11/3/2014 0.2 0.2 0
11/4/2014 0 0.003 0.003
2/10/2015 < 0.1 0.05 < 0.001 0.0005
5/11/2015 0.2 0.2 0
5/12/2015 0 < 0.001 0.0005
8/10/2015 0.2 0.2 0
8/11/2015 0 0.0022 0.0022
11/9/2015 < 0.1 0.05 0
11/10/2015 0 0.0029 0.0029
2/8/2016 0.4 0.4 0
2/9/2016 0 0.0043 0.0043
Averages (BDL=1/2 DL) 0.1864 0.002264
Percent removal 98.78537