NC0023736_Permit (Issuance)_20051215

NPDES DOCIMENT !;CANNING COVER SHEET
NPDES Permit:
NC0023736
Gunpowder Creek WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
December 15, 2005
This document is printed on reuse paper - iginore any
content on the resrerse side

W. Lane Bailey
City Manager
P.O. Box 958
Lenoir, North Carolina
28645
Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
December 15, 2005
Subject: Issuance of NPDES Permit
NC0023736
Gunpowder Creek WWTP
Caldwell County
Dear Mr. Bailey:
Division personnel have reviewed and approved your application for renewal of the subject
permit. Accordingly, we are forwarding the attached NPDES discharge permit. This permit is issued
pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the U.S. Environmental Protection Agency dated May 9,1994 (or
as subsequently amended).
This final permit includes the following changes from your draft permit:
> It is Division policy to give permit limits for those parameters present in your effluent that can
reasonably be expected to cause an exceedance of water quality standards. In your draft permit,
chromium and lead monitoring were added as a result of data submitted as part of your LTMP.
Rather than give a limit at this time, we feel it is appropriate to place a delayed limit in your
permit. Limits for these parameters will become effective in 18 months (June 1, 2007). In 12
months, you may petition the Division for removal of these requirements.
> A typographical error concerning your pH limit has been corrected. The correct limit is 6.0 to 9.0
s.u.
> Please be advised that there are water quality concerns about nutrient loading into Lake
Hickory. Duke Power is conducting an extensive water quality model in the Catawba River
mainstem and preliminary results indicate that point source nutrient limits may be necessary in
the future to reduce the impact on Lake Rhodhiss and Lake Hickory. Based on this information
the Division is requiring that The City of Lenoir conduct a nutrient optimization study on the
Gunpowder WWTP. This will also be a requirement for the Lower Creek WWTP during its next
permit cycle.
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.
North Carolina Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
[phone]
FAX [phone]
On the Internet at http://h2a.enr.state.nc.us/

Please note that this permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit. This permit does not affect the legal
requirements to obtain other permits which may be required by the Division of Water Quality or
permits required by the Division of Land Resources, 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 Toya Fields at telephone number [phone], extension 551.
Sincerely,
Alan W. Klimek, P.E.
cc: Central Files
Mooresville Regional Office/Water Quality Section
NPDES Unit
Marshall Hyatt, EPA, Region IV
2

Permit NC0023736
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the 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
Gunpowder Creek Wastewater Treatment Plant
Off NCSR 1127
Caldwell County
to receiving waters designated as Gunpowder 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.
The permit shall become effective January 1, 2006.
This permit and the authorization to discharge shall expire at midnight on January 31, 2009.
Signed this day December 15, 2005.
Alee,„.J
Alan W. Klimek, P.E. , Director
Division of Water Quality
By Authority of the Environmental Management Commission

4
Permit NC0023736
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 to operate an existing 2.0 MGD wastewater treatment facility consisting of
the following components:
➢ Mechanical bar screen
> Vortex grit removal
> Ultrasonic parshall flume flow transmitter
> Four basin sequencing batch reactors
➢ Post -equalization basin
> Post equalization pump station
> Chlorine contact basin and chlorine feed system
➢ Sulfur dioxide dechlorination system
> Step aeration system
➢ Ultrasonic effluent flow transmitter
> Sludge holding tank
This facility is located at Gunpowder Creek Wastewater Treatment Plant, off NCSR
1127, Caldwell County.
2. Discharge from said treatment works at the location specified on the attached map
into Gunpowder Creek, which is classified WS-IV water in the Catawba River Basin.

Gunpowder Creek WWTP — NC0023736
USGS Quad Name: Granite Falls
Receiving Stream: Gunpowder Creek
Stream Class: WS-IV
Subbasin: Catawba — 03 08 32
Lat.: 35°50'34"
Long.: 81°27'49"
Facility
Location
•
Not to SCALE

Permit NC0023736 '
A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee
is authorized to discharge from outfall(s) serial number 001. Such discharges shall be limited and
monitored by the Permittee as svecified below:
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4! # ," �,. 'I I1ViITS ',', �' - '
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Flow
2.0 MGD
Continuous
Recording
I or E
BOD5 2
30.0 mg/1
45.0 mg/1
Daily
Composite .
E, I
Total Suspended Solids 2
30.0 mg/1
45.0 mg/I
Daily
Composite
E, I
NH3-N
(Apr 1 through Oct 31)
2.0 mg/I
6.0 mg/L
Daily
Composite
E
NH3-N
(Nov 1 through May 31)
4.0 mg/I
12.0 mg/L
Daily
Composite
E
Dissolved Oxygen3 •
Daily
Grab
E
Dissolved Oxygen4
Weekly
Grab
U, D
Fecal Coliform
200/100 ml
400/100 ml
. •
Daily
Grab
E
Fecal Coliform4
Weekly
Grab
U, D
pH
Between 6.0 and 9.0 s.u.
Daily
Grab
E
pH4
Weekly
Grab
U, D
Total Residual Chlorines
28 ug/1
Daily
Grab
E
Temperature
Daily
Grab
E
Temperature '
Weekly
-Grab
U, D
Total Nitrogen
Monthly
Composite
E
Total Nitrogen
Monthly
Grab
U, D
Total Phosphorus
Monthly
Composite
E
Total Phosphorus
Monthly
Grab
U, D
Conductivity
Daily
Grab
E
Conductivity 4
Weekly
Grab
U, D
Chronic Toxicity6
Quarterly
Composite
E
Total Cadmium
3.9 µg/1
15 µg/I
Weekly
Composite
E
Total Selenium
9.7 µg/I
Weekly
Composite
E
Total Chromium
2/Month
Composite
E
Total Chromium?
97 µg/L
Weekly
Composite
E
Total Lead
2/Month
Composite
E
Total Lead%
48 µg/L
Weekly
Composite
E
Total Copper
2/Month
Composite
_
E
Total Zinc
2/Month
Composite
E
Total Silver
2/Month
Composite
E
Notes
Sample Locations: E - Effluent, I - Influent, U - At least 100 feet upstream, D1- approximately 2,000 feet below
the outfall.
2. The monthly average BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective
influent value (85% removal).
3. The daily average dissolved oxygen effluent concentrations shall not be less than 5 mg/1.
4. Sampling frequency increases to 3/week during June, July, August and September.
5. Monitoring requirement applies only if chlorine is added for disinfection.
6. Chronic Toxicity (Ceriodaphnia) P/F @ 52%; March, June, September, December. See A (3) Special Conditions
of the Supplement to Effluent Limitations.
7. Limit takes effect June 1, 2007.
There shall be no discharge of floating solids or foam visible in other than trace amounts.

Permit NC0023736
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
A (2). NUTRIENT OPTIMIZATION STUDY
The Division is requiring that The City of Lenoir conduct a nutrient optimization study on the Gunpowder Creek
WWTP. The optimization study should identify the sources of total phosphorus (TP) and total nitrogen (TN) and
evaluate how to reduce and minimize these inputs to the plant. In addition, the facility should review operational
and treatment techniques to determine if TP and TN removal is being maximized. The optimization study will be
due January 1, 2007.
A (3). CHRONIC TOXICITY PERMIT LIMIT (QUARTERLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant mortality to
Ceriodaphnia dubia at an effluent concentration of 52 %.
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 II Chronic
Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code TGP3B for the
pass/fail results and THP3B for the Chronic Value. Additionally, DWQ Form AT-3 (original) is to be sent to the
following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Water Quality
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

a
Permit NC0023736
facility name, permit number, pipe number, county, and the month/year of the report with the notation of "No
Flow" in the comment area of the form. The report shall be submitted to the Environmental Sciences Branch at the
address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, monitoring will be
required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina Division of
Water Quality indicate potential impacts to the receiving stream, this permit may be re -opened and modified to
include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival, minimum control organism reproduction, and appropriate environmental controls, shall constitute an
invalid test and will require immediate follow-up testing to be completed no later than the last day of the month
following the month of the initial monitoring

Permit NC0023736
A. (4) EFFLUENT POLLUTANT SCAN
The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table below
(in accordance with 40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal
(summer, winter, fall, spring) variations over the 5-year permit cycle. Unless otherwise indicated, metals
shall be analyzed as "total recoverable." Additionally, the method detection level and the minimum level
shall be the most sensitive as provided by the appropriate analytical procedure.
Ammonia (as N)
Chlorine (total residual, TRC)
Dissolved oxygen
Nitrate/Nitrite .
Total Kjeldahl nitrogen
Oil and grease
Total Phosphorus
Total dissolved solids
Hardness
Antimony
Arsenic
Beryllium
Cadmium
Chromium
Copper
Lead
Mercury
Nickel
Selenium
Silver
Thallium
Zinc
Cyanide
Total phenolic compounds
Volatile organic compounds:
Acrolein
Acrylonitrile
Benzene
Bromoform
Carbon tetrachloride
Chlorobenzene
Chlorodibromomethane
Chloroethane
2-chloroethylvinyl ether
Chloroform
Dichlorobromomethane
1,1-dichloroethane
1,2-dichloroethane
Trans-1,2-dichloroethylene
1,1-dichloroethylene
1,2-dichloropropane
1,3-dichloropropylene
Ethylbenzene
Methyl bromide
Methyl chloride
Methylene chloride
1,1,2,2-tetrachloroethane
Tetrachloroethylene
Toluene
1,1,1-trichloroethane
1,1,2-trichloroethane
Trichloroethylene
Vinyl chloride
Acid -extractable compounds:
P-chloro-m-cresol
2-chlorophenol
2,4-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
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-ciichlorobenzene
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
Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the
Director, within 90 days of sampling. A copy of the report shall be submitted to Central Files to the
following address: Division of Water Quality, Water Quality Section, 1617 Mail Service Center, Raleigh,
North Carolina 27699-1617.

NCDENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
City of Lenoir, Gunpowder Creek WWTP
NC0023736
Facility Information
(1.) Facility Name: 1 Gunpowder Creek WWTP
(2.) Permitted Flow (MGD):
(3.) Facility Class:
i 2.0
(6.) County:
(7.) Regional Office:
Caldwell
1 IV
1 Asheville
(4.) Pretreatment Program: Pull
(8.) USGS Topo Quad: D13SW
(5.) Permit Status: Renewal
(9.) USGS Quad Name: Granite Falls
Stream Characteristics
(1.) Receiving Stream:
Gunpowder Creek
(7.) Drainage Area (mi2):
12.9
(2.) Sub -basin:
03-08-32
(8.) Summer 7Q10 (cfs):
2.9
(3.) Stream Index Number:
11-55-0.5
(9.) Winter 7Q10 (cfs):
4.0
(4.) Stream Classification:
(5.) 303(d) Status:
WS-W
(10.) 30Q2 (cfs):
(11.) Average Flow (cfs):
i 5.8
Not listed
1 17.4
l
(6.) 305(b) Status:
Not listed
(12.) IWC %:
52
1.0 Proposed Changes Incorporated into Permit Renewal
• Remove instream monitoring at millpond (downstream location #2)..
• Add 2/month chromium and lead monitoring due potential for levels of these parameters to
cause an exceedance in water quality standards.
• Remove fluoride and nickel monitoring due to lack of reasonable potential for levels of these
parameters to cause an exceedance of water quality standards.
• Add yearly PPA scan based on current Division permitting strategy.
• Add weekly ammonia limit due to current Division -wide ammonia policy.
2.0 Summary
The city of Lenoir is requesting renewal of the Gunpowder Creek WWTP. The 2.0 MGD
facility discharges into Gunpowder Creek, a class WS-IV waterbody. Gunpowder Creek is
currently supporting its designated use with a Good -Fair bioclassification. However, heavy
sedimentation has resulted in habitat degradation. The 2004 Catawba basin plan recommends
that DWQ continue to monitor this stream and recommends further work be done to determine
the causes of habitat degradation in this stream.
The facility has a full pretreatment program and is required to continue its
implementation.
3.0 Compliance Summary
Effluent DMR Data Review
Effluent DMRs were reviewed for the period of January 2002 through May 2005. Monthly
average data is summarized in Table 1, below. Average flows at the Gunpowder Creek facility
are at 50% capacity with maximum monthly average flow of 82% during April 2003. Monthly
average values for all limited parameters appear to be well within permit requirements: the

Page 2
NPDES Permit Fact Sheet - 10/12/05 City of Lenoir, Gunpowder Creek WWTP
NC0023736
facility does not appear to have any difficulties meeting its permit limits. There have been
several isolated violations; these will be discussed in the Compliance History section below.
Table 1.2002-2005 Monthly Averaee DMR data Summa
Date
Flow '
"(MGD)
Temp.
(deg C)
TRC
.(ug/L)
BOD
(mg/L) ..
NH3-N
(mg/L)
•
`TSS
(mg/L)
Fecal "
(#/100 mL)
D.O.
(mg/L)
TKN :
'TN `
• TP
Avg
1.00
17.81
11.25
9.87
0.28
11.91
67.34
8.48
2.42
6.46
2.75
Max
1.65
25.30
13.00
37.50
2.20
40.80
1950.00
9.90
5.98
12.73
4.61
Min
0.66
11.30
10.00
2.60
0.01
2.10
3.00
7.10
0.83
1.86
0.35
Limit
2.0
,
28.0
30.0
2.0(w)
4.0 (s)
30.0
200.0
> 5.0
'
Instream DMR data review
The:Gunpowder Creek facility is required to perform instream monitoring at three locations: one
upstream and two downstream. Monitoring parameters are pH, DO, fecal coliform, temperature,
total nitrogen, total phosphorus, conductivity, and chlorophyll a (at one downstream location
only). The two downstream locations were chosen because past reviews of the WLA and permit
indicated that this facility may have been impacting the Old Millpond and may cause
eutrophication. Modelers had planned to do additional work and possibly a nutrient model. A
summary of instream data at the three monitoring locations is presented in Table 2. A maximum
chlorophyll a result of 25.8 µg/L was reported, but that is far below the state standard of 40 µg/L.
TN and TP values are slightly above the state criteria (1.0 mg/L and 0.1 mg/L, respectively) but
is does not appear that this is caused by the discharge. The facility seems to be having a minimal
impact on the receiving stream. Although it may in fact prove useful to have the facility continue
collecting data at this downstream location, the results seem to show that the facility has little, if
any, negative effect on the downstream millpond. Therefore the requirement to monitor in the
millpond will be removed during this renewal.
Table 2: Summary of Averaee Instream Data
Parameter
Upstream
Downstream 1
Downstream 2
Temp (°C)
14.6
14.8
22.4
pH (s.u)
6.9
6.9
7.1
DO (mg/L)
9.3
9.2
8.5
Conductivity (umhos/cm)
56.3
66.2
52.0
Fecal (# / 100 ml)
1236.6
1070.2
TN (mg/L)
1.2
0.9
1.1
TP (mg/L)
0.7
1
0.2
Chlorophyll a (µg/1)
6.6
Pre-treatment Data Review
This facility has 2 SIUs,1 CIU, and a full long-term monitoring program with the
pretreatment unit. As required under the LTMP, the Gunpowder Creek WWTP is required to
perform quarterly monitoring for cyanide, mercury, molybdenum, and selenium, in addition to
the POCs as defined in the NPDES permit. RPAs were performed for each of these parameters
and the results are discussed in the following section of this fact sheet.

NPDES Permit Fact Sheet — 10/12/05 City of Lenoir, Gunpowder Creek WWTP
Page 3 NC0023736
RPA Analysis
RPAs were performed for the following parameters based on DMR data submitted as a
requirement of the NPDES permit:
> Cadmium > Copper
➢ Fluoride > Zinc
➢ Selenium ➢ Silver
➢ Nickel
Permit requirements will be retained for cadmium, selenium, copper, zinc and silver. The nickel
and fluoride limits and monitoring requirements will be removed based on the results of the
RPAs. Both will continue to be monitored as part of the LTMP for this facility.
RPAs were performed for the following parameters based on DMR data submitted as a result of
LTMP or sludge plan requirements:
> Arsenic > Mercury
> Chromium > Molybdenum
> Lead
Data for arsenic, mercury, and molybdenum showed these parameters not to be pollutants of
concern. For lead and chromium, however, maximum predicted concentrations were above the
allowable. 2/month monitoring for these parameters will be added to the NPDES permit and
delayed limits will take effect in 18 months unless the facility petitions the Division for their
removal.
WET Test Results
The Gunpowder WWTP has a chronic toxicity requirement at 52%. The facility has
passed 18/18 WET tests performed since January 2001.
Correspondence File Review/Compliance History
In 2003 the facility seemed to have some recurrent problems with meeting BOD, TSS, and
fecal coliform limits. It appears that whatever issues caused these violations have been remedied.
Other than that there have been no major compliance concerns with this facility.
4.0 Proposed Schedule for Permit Issuance
Draft Permit to Public Notice:
Permit Scheduled to Issue:
5.0 State Contact Information
8/3/05
10/1/05
If you have any questions on any of the above information or on the attached permit, please
contact Toya Fields at [phone], extension 551.
Copies of the following are attached to provide further information on the permit development:
• Draft permit
NPDES Recommendation by:
Signature Date

North Carolina Department of
Environment and Natural Resources
Division of Water Quality
[phone]
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NCDENR
North Carolina Department of Environment and Natural Resources
PUBLIC WATER SUPPLY SECTION
Michael F. Easley, Governor William G. Ross, Jr., Secretary
MEMORANDUM
TO: Ms. Toya Fields
NPDES Unit
Division of Water Quality
FROM: Jessica G. Miles, P.E., C.P.M., Chief
Public Water Supply Section
DATE: August 15, 2005
SUBJECT: Draft National Pollutant Discharge
Elimination System Permit — NPDES
City of Lenoir, Gunpowder Cr. WWTP
Permit NC0023736
Caldwell County
Reference is made to the subject Draft National Pollutant Discharge Elimination System permit. We have
reviewed the permit information and determined that the proposed discharge will not adversely affect
water quality upstream of any existing or know proposed public water supply intake.
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.
If we can be of further assistance, please contact us.
JGM/JPA
1634 Mail Service Center, Raleigh, NC 27699-1634
Phone: [phone] FAX: [phone]
Internet: http://ncdrinkingwater.state.nc.us/
An Equal Opportunity / Affirmative Action Employer - 50 % Recycled 110 % Post Consumer
G:IWPDATAIPWSWPDESNPDES- NC0039152-Ohio Elect. Motors-Buncombe'05.doc
AUG 1 8 2005
W;.ft.i QU,'\I_IIY�l
POI SO;iciCE B..C;i:CH
One
NorthCarolina
Naturally

Draft Permit Review
s
5
Subject: Draft Permit Review
From: John Giorgino <[e-mail]>
Date: Fri, 19 Aug 2005 14:33:47 -0400
To: Toya Fields <[e-mail]>
Toya, I have reviewed NC 0023736 Gunpowder Creek WWTP. I have no comments, thanks
for forwarding it to me.
John Giorgino
Environmental Biologist
North Carolina Division of Water Quality
Environmental Sciences Section
Aquatic Toxicology Unit
Mailing Address:
1621 MSC
Raleigh, NC 27699-1621
Office: 919 733-2136
Fax: [phone]
Email: [e-mail]
Web Page: http://www.esb.enr.state.nc.us
1 of 1 10/12/2005 12:22 PM

Draft ,NPDES Permit NC0023736
Subject: Draft NPDES Permit NC0023736
From: "Monte Wall" <[e-mail]>
Date: Tue, 23 Aug 2005 13:52:54 +0000
To: [e-mail]
CC: [e-mail], [e-mail], [e-mail]
Ms Fields:
I have reviewed the draft NPDES permit (NC0023736), originally sent to our city
manager, W. Lane Bailey, for our Gunpowder Creek WWTP.
I have only one comment concerning the draft permit. In Part I A(1), "Effluent
Limitations and Monitoring Requirements", a pH limit of "Between 6.9 and 9.0 s.u."
was listed, with the footnote of "Monitoring requirement applies ly if chlorine is
added for disinfection." We do chlorinate and dechlorinate, s he limit would apply
to us. I am hoping that the "6.9" was a typographical error since our previous
permit had a lower limit of 6.0 s.u. In the case that 6.9 s.u. will be our lower
limit, we would have to add caustic soda, or another alkaline chemical, so that our
effluent would meet that limit. During the month of June 2005, our highest daily pH
was 6.84 s.u.
Please let me know ASAP if the 6.9 s.u. lower pH limit applies.
Thank you for your assistance in this matter.
Monte Wall, Supt.
City of Lenoir - Gunpowder Creek WWTP
P.O. Box 958
Lenoir, NC 28645
1 of 1 8/23/2005 10:12 AM

1.P A 'is REGION 4
o Q ATLANTA FEDERAL CENTER
ZI.F = 61 FORSYTH STREET
49.44 PR01e9 ATLANTA, GEORGIA 30303-8960
AUG 2pp 4,
J���ED sT,�J�S
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
Ms. LeToya Fields
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
SUBJ: Draft NPDES Permit
Lenoir - Gunpowder Creek WWTP
Permit No. NC0023736
Dear Ms. Fields:
In accordance with the EPA/NCDENR MOA, we have completed review of the draft
permit referenced above and have no comments. We request that we be afforded an additional
review opportunity only if significant changes are made to the draft permit prior to issuance or if
significant comments objecting to it are received. Otherwise, please send us one copy of the final
permit when issued.
Sincerely,
Marshall Hyatt, Environmental Scientist
Permits, Grants, and Technical Assistance Branch
Water Management Division
S E P - 1 2005
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable • Printed with Vegetable 011 Based Inks on Recycled Paper (Mlnimgttv30%fostconsumer)

Re: Fw: Lenoir - Gunpowder Creek WWTP (NC0023736) draft permit...
Subject: Re: Fw: Lenoir - Gunpowder Creek WWTP (NC0023736) draft permit - forgot one comment
From: Toya Fields <[e-mail]>
Date: Thu, 25 Aug 2005 16:57:44 -0400
To: Hyatt.Marshall @epamail.epa.gov
I can put language in requiring monthly monitoring. We can then give them a limit
that will take effect after 18 months with a note in the cover letter advising that
they can request to have the limit removed upon submitting 12 consecutive months of
data that do not show reasonable potential to exceed WQ standards.
[e-mail] wrote:
thanks. re comment #1, if you do go with a delayed limit, Lenoir still
has the opportunity to generate data that show no limit is needed. will
you definitely be requiring a delayed limit or a limit with a compliance
schedule?
1 of 1 10/12/2005 12:25 PM

Re: Fw: Lenoir - Gunpowder Creek WWTP (NC0023736) draft permit...
Subject: Re: Fw: Lenoir - Gunpowder Creek WWTP (NC0023736) draft permit - forgot one comment
From: Toya Fields <[e-mail]>
Date: Tue, 23 Aug 2005 10:12:01 -0400
To: [e-mail]
Hi Marshall,
I've been in and out of the office sick (yesterday included) so I apologize for not
getting back to you on this.
1)s, it would be appropriate to give either a limit or delayed limit for chromium
an lead. The reason I simply added monitoring was because many of the most recent
to points for both parameters were below the detection level (since December
004). either of these were required in the previous permit so I thought 'a better
look' a the values (i.e. monitoring) might also be appropriate. Perhaps it would be
more nsistent.with other permits to add limits for these parameters.
2)
3,4,5
6) Tg.
7)
he facility also alerted me to this error.
8) I'1 dd that.
[e-mail] wrote:
sorry for the delay in getting these to you - will you be able to
respond by next Mon, Aug 22? thanks Marshall
1. Chromium and lead seem to have reasonable potential, but the permit
requires monitoring only. Pls explain. Would use of a delayed limit
be appropriate here?
2. Footnote 2 should refer to "total suspended solids".
3. For pH, the minimum is specified as 6.9. Should that be 6.0
instead? Also, it refers to footnote 5, which doesn't seem appropriate.
4. F r TRC, the appropriate footnote should be Footnote 5.
5. r chronic toxicity, the appropriate footnote should be Footnote 6.
6. In,F`ootnote 1, shouldn't "D1" be changed o "D" to be consistent
with e table above?
7. Footnote 6 should reference A(2), z t fer than A(3).
8. If the City has an isting pretreatment program, the fact sheet
should add the stands language saying that it will continue to be
required to impl its exisitng program.
I of I 10/12/2005 12:25 PM

PUINLIC NOTICE
STATE OF,
NORTH CAROLINA
ENVIRONMENTAL ,
MANAGEMENT
COMMISSION/
NPDES,UNIT'
1617 MAIL SERVICE
CENTER`'
RALEIGH, NC
27699-1617
NOTIFICATION OF
INTENT TO'.ISSUE A
NPDES
WASTEWATER
PERMIT.
On ;the basis . of 'thor-
ough staff review
and .'application of
NC General :statute
143.21 up)ic, law,„
�92" ",: ni theL
lawful ;idard :and.
regulations,, the
North Carolina' Envi-
ronmental :� Manage-
ment • Commission
proposes, to issue` a
National. ' Pollutant
Discharge Elimina-
tion System
(NPDES) ' wastewa-
ter' discharge permit
'! to the person(s) Iist-
. ed below, . effective
45 days =from the
, publish: date 'of ` this'
notice. , •
j Written comments re-
( garding!; thepro-
' posed . permit will be
accepted .until `:° _ 30
days , after _the pub-
lish date :bf this no-
tice, ,,All ', comments;
received prior;to that;
• date are:Considered
considered
in the, final .determi..
' nation§� ' ,regarding
• the proposed permit.
The, birector of the
NC Division. of -Witter
' Quality;.rnay decide
to hold:, -a ; public
meeting,for th"e. pro-
%posed,permit should
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 Brenda W. Penley
who being first duly sworn, deposes and says: that
Advertising Director
he is
of Lenoir Newspapers, Inc., engaged in the publication
of a newspaper known as Lenoir News -Topic, pub-
lished, issued, and entered as second class mail in the
City of Lenoir, in said County and State; that he is
authorized to make this affidavit and sworn state-
ment; 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:
Aug.•6
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 quali-
fications of Section 1-597 of the General Statutes of
of North Carolina and was a qualified newspaper within
the meaning of Section 1-597 of the General Statutes
of North Carolina.
This 6th day of . , , Aug .
„3-0o)--
ice....
Sworn to and subscribed before me, this 6th
Notary Public
My Commission expires:

ter aiscnarge permit
to the person(s) list-
ed below effective
45 days from the
publish date of this
notice.
Written comments re-
garding the pro-
posed permit will be
accepted until 30
days after the pub-
lish date of this no-
tice. All comments
received prior to that
date are considered
in the final determi-
nations regarding
the proposed permit.
The Director of the
NC Division of Water
Quality may decide
to hold a public
meeting for the pro-
posed permit should
the Division receive
a significant degree
of public interest.
Copies of the draft
permit and other
supporting informa-
tion on file used to
determine conditions
present in the draft
permit are available
upon request and
payment of the costs
of reproduction. Mail
comments and/or re-
quests for informa-
tion to the NC Divi-
sion of Water Quality
at the above ad-
dress or call the
Point Source Branch
at [phone],
extension 520.
Please include the
NPDES permit num-
ber (attached) in any
communication. In-
terested persons
may also visit the Di-
vision of Water
Quality at 512 .N.
Salisbury Street, Ra-
leigh, NC 27604-
1148 between the
hours of 8:00 a.m.
and 5:00 p.m. to re-
view . information on
file.
The City of Lenoir (P.O.
Box 958, Lenoir, NC
28645) has applied for
renewal of NPDES per-
mit NC0023736 for the
Gunpowder Creek
WWTP in Caldwell
County. This permitted
facility discharges 2.0
MGD of treated waste-
water to Gunpowder
Creek in the Catawba
River Basin. Currently
ammonia nitrogen and
total residual chlorine
are water quality limit-
ed. This discharge may
affect future allocations
in this portion of the
Catawba River Basin.
August 6, 2005
ut legal auverusement was published
was, at the time of each and every publication, a
newspaper meeting all of the requirements and quali-
fications of Section 1-597 of the General Statutes of
of North Carolina and was a qualified newspaper within
the meaning of Section 1-597 of the General Statutes
of North Carolina.
Sworn to and subscribed before me, this 6th
day of ...,Augus.t
Notary Public
My Commission expires:

NCDENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
City of Lenoir, Gunpowder Creek WWTP
NC0023736
Facility Information
(1.) Facility _.._.._-..........._........._ .................:..._Gunpowder Creek WWTP
(2.) Permitted Flow (MGD): 1 2.0
(6.) County: ; Caldwell
(3.) Facilit Class: I W
(7.) Regional Office: 1 Asheville
(8.) USGS Topo Quad: D13SW
(9.) USGS Quad Name: Granite Falls
(4.) Pretreatment Progra m:
(5.) Permit Status:
Full
Renewal
Stream Characteristics
(1.) Receiving Stream:
Gunpowder Creek --
1 03-08-32
(7.) Drainage Area (mi2):
E 8. Summer 7Q10
(9.) Winter 7Q10 (cfs):
12.9
4.0
5.8
17.4
-�
2. Sub -basin:
(3.) Stream Index Number: 111-55-0.5
(....._4.) Stream Classification: WS-IV
(5.) 303(d) Status: I Not listed
(6.) 305(b) Status: Not listed
(10.) 30Q2 (cfs):
1 (11.) Average Flow (cfs):
f (12.) IWC %:
52
1.0 Proposed Changes Incorporated into Permit Renewal
• Remove instream monitoring at millpond (downstream location #2).
• Add 2/month chromium and lead monitoring due potential for levels of these parameters to
cause an exceedance in water quality standards.
• Remove fluoride and nickel monitoring due to lack of reasonable potential for levels of these
parameters to cause an exceedance of water quality standards.
• Add yearly PPA scan based on current Division permitting strategy.
• Add weekly ammonia limit due to current Division -wide ammonia policy.
2.0 Summary
The city of Lenoir is requesting renewal of the Gunpowder Creek WWTP. The 2.0 MGD
facility discharges into Gunpowder Creek, a class WS-IV waterbody. Gunpowder Creek is
currently supporting its designated use with a Good -Fair bioclassification. However, heavy
sedimentation has resulted in habitat degradation. The 2004 Catawba basin plan recommends
that DWQ continue to monitor this stream and recommends further work be done to determine
the causes of habitat degradation in this stream.
3.0 Compliance Summary
Effluent DMR Data Review
Effluent DMRs were reviewed for the period of January 2002 through May 2005. Monthly
average data is summarized in Table 1, below. Average flows at the Gunpowder Creek facility
are at 50% capacity with maximum monthly average flow of 82% during April 2003. Monthly
average values for all limited parameters appear to be well within permit requirements: the
facility does not appear to have any difficulties meeting its permit limits. There have been
several isolated violations; these will be discussed in the Compliance History section below.

NPDES Permit Fact Sheet - 08/ 02 / 05
Page 2
Table 1.2002-2005 Monthly Average DMR data Summ
City of Lenoir, Gunpowder Creek WWTP
NC0023736
r
''' �r
+ PIow
Ott
6Telit:
d •s
tx
)
z
u
°
f
)
r _Y5A.,
l.
� F l
if )
Aa+t�:• f
s6�
.
!„.x�
21'1_.
Avg
1.00
17.81
11.25
9.87
0.28
11.91
67.34
8.48
2.42
6.46
2.75
Max
1.65
25.30
13.00
37.50
2.20
40.80
1950.00
9.90
5.98
12.73
4.61
Min
0.66
11.30
10.00
2.60
0.01
2.10
3.00
7.10
0.83
1.86
0.35
Limit
2.0
28.0
30.0
2.0 (w)
4.0 (s)
30.0
200.0
> 5.0
Instream DMR data review
The Gunpowder Creek facility is required to perform instream monitoring at three locations: one
upstream and two downstream. Monitoring parameters are pH, DO, fecal coliform, temperature,
total nitrogen, total phosphorus, conductivity, and chlorophyll a (at one downstream location
only). The two downstream locations were chosen because past reviews of the WLA and permit
indicated that this facility may have been impacting the Old Millpond and may cause
eutrophication. Modelers had planned to do additional work and possibly a nutrient model. A
summary of instream data at the three monitoring locations is presented in Table 2. A maximum
chlorophyll a result of 25.8 µg/L was reported, but that is far below the state standard of 40 µg/L.
TN and TP values are slightly above the state criteria (1.0 mg/L and 0.1 mg/L, respectively) but
is does not appear that this is caused by the discharge. The facility seems to be having a minimal
impact on the receiving stream. Although it may in fact prove useful to have the facility continue
collecting data at this downstream location, the results seem to show that the facility has little, if
any, negative effect on the downstream millpond. Therefore the requirement to monitor in the
millpond will be removed during this renewal.
Table 2: Summary of Averaee Instream Data
Parameter
;Upstream
Downstream 1
Downstream 2
Temp (°C)
14.6
14.8
22.4
pH (s.u)
6.9
6.9
7.1
DO (mg/L)
9.3
9.2
8.5
Conductivity (umhos/cm)
56.3
66.2
52.0
Fecal (#/100 ml)
1236.6
1070.2
TN (mg/L)
1.2
0.9
1.1
TP (mg/L)
0.7
1
0.2
Chlorophyll a (µg/ 1)
6.6
Pre-treatment Data Review
This facility has 2 SIUs, 1 CIU, and a full long-term monitoring program with the
pretreatment unit. As required under the LTMP, the Gunpowder Creek WWTP is required to
perform quarterly monitoring for cyanide, mercury, molybdenum, and selenium, in addition to
the POCs as defined in the NPDES permit. RPAs were performed for each of these parameters
and the results are discussed in the following section of this fact sheet.
RPA Analysis
RPAs were performed for the following parameters based on DMR data submitted as a
requirement of the NPDES permit:
➢ Cadmium ➢ Fluoride

NPDES Permit Fact Sheet — 08/ 02 / 05 City of Lenoir, Gunpowder Creek WWTP
Page 3 NC0023736
➢ Selenium
➢ Nickel
➢ Copper
➢ Zinc
➢ Silver
Permit requirements will be retained for cadmium, selenium, copper, zinc and silver. The nickel
and fluoride limits and monitoring requirements will be removed based on the results of the
RPAs. Both will continue to be monitored as part of the LTMP for this facility.
RPAs were performed for the following parameters based on DMR data submitted as a result of
LTMP or sludge plan requirements:
➢ Arsenic ➢ Mercury
➢ Chromium ➢ Molybdenum
➢ Lead
Data for arsenic, mercury, and molybdenum showed these parameters not to be pollutants of
concern. For lead and chromium, however, maximum predicted concentrations were above the
allowable. 2/month monitoring for these parameters will be added to the NPDES permit
WET Test Results
The Gunpowder WWTP has a chronic toxicity requirement at 52%. The facility has
passed 18/18 WET tests performed since January 2001.
Correspondence File Review/Compliance Histony
In 2003 the facility seemed to have some recurrent problems with meeting BOD, TSS, and
fecal coliform limits. It appears that whatever issues caused these violations have been remedied.
Other than that there have been no major compliance concerns with this facility.
4.0 Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: 8/ 3/ 05
Permit Scheduled to Issue: 10/ 1 / 05
5.0 State Contact Information
If you have any questions on any of the above information or on the attached permit, please
contact Toya Fields at [phone], extension 551.
Copies of the following are attached to provide further information on the permit development
• Draft permit
INPDES Recommendation by:
Signature Date
Regional Office Comments:

REASONABLE POTENTIAL ANALYSIS
Gunpowder Creek WWTP
NC0023736
Time Period Jane 2003 - May 2005
Qw (MGD) 2
70105 (cfs) 2.9
7Q10W (cfs) 4
30Q2 (cfs) 5.8
Avg. Stream Flow, QA (cfs) 17.4
Reeving Stream Gunpowder Creek WWTP
WWTP Class IV
IWC (%) @ 7Q10S 51.667
7Q10W 43.662
30Q2 34.831
QA 15.122
Stream Class WS-IV
Outfall 001
Qw = 2 MGD
V
/
l/
TYPE
0)NC
STANDARDS &
CRITERIA (2)
Kt.
Una
REASONABLE POTENTIAL RESULTS
RECOMMENDED ACTION
PARAMETER
DVS /
Chronic
% FAY /
Rano
n
/Dot WandCw RUowahbar
7 Arsenic
NC
10
WS
uglL
27
0
22.3
Acute: N/A
_ --__ __
Chronic 19
— _ _ __-.
Required as part of sludge program. Different DLs are
causing variation. Ali results were glow detection.
f Cadmium
NC
2.0
15
ug/L
106
2
4.8
Acute: 15
_ —.__—
Chronic 4
—_ _ _ _ _ _ — --
One tw of the o hits is a value of 4 ug/l. in 1212004.
Retain monitoring
/Chromium
NC
50
1022
ugf.
27
6
293.2
Acute: 1.022
_ -- _ _—_
Chronic • 97
—__ _ -- _-- — -----
Monitoring was required as part of LTMP.
Add monitoring to permit requirements
/• Copper
NC
7
AL
7
uglL
49
45
203.7
Acute: 7
- _ _ _ _
Chronic: 14
_ _ — .
Retain monitoring - — —— - — - —-— —
- Fluoride
NC
1.8
mg/L
105
105
2.8
Acute: N/A
_ _•—__ _`---
Chronic 3.5
_ _ _---•
max predicted a ai owabte.. Remove limit. monitoring.
Parameter will be monitored as pact of LTMP.
Lead
NC
25
N
33.8
uglL
28
15
282.2
Acute: 34
- _ __
Chronic 48
_ _ _— — _—_—_.
Monitoring was required as part of LTMP.
Add monitoring to permit requirements
Mercury
NC
0
2E-04
uglL
17
5
0.3
Acute: WA
Chronic: 0.0232
Monitoring required as part of LTMP. — — — — --y
High DL increased variance. Not a POC
/ Molybdenum
A
170
ug/L
25
20
204.0
Acute: N/A
_ •—_— —
Chronic -488
-- —_--- — —
Monitoring required as part of nudge program
Nickel
NC
25.000
281
ug/L
102
22
31.4000
Acute: 281
Chronic 48
max predicted < allowable. Remove limit, monitoring.
/ Selenium
NC
5
58
ug/L
102
27
32.2
Acute: 58
_ _ _ _ _ _ _ _
Chronic 10
_ _ _ _ _
Retain'limit/monitoring — — — — -----
r Silver
NC
17
AL
1.23
ug/L
44
15
272.8
Acute: 1
_ _ _--_ _
Chronic 33
_ — _ _ — _
Action level parameter.: Retain monitoring — - —
/ Zinc
NC
50
AL
87
ug/t.
52
52
364.1
Acute: 67
- __-- —
Chronic 97
_-_ _-- ---- — —
Action level parameter. Retain monitoring
0
0
N/A
Acute: N/A
_ _
Chronic :rror a Type
_ — — — — — — —-----------
0
0
WA
Acute: N/A
_
Ctrronic gror Type
------- — — — — --—--
0
0
WA
Acute: N/A
Chronic nor @ Typo
I
. Leger.
C Carcinogenic
NC = Non-cardnogenic
A = Aesthetic
" Freshwater Discharge
23736rpa.xds, rpa
8/2/2005

NPDES/Non-Discharge Permitting Unit Pretreatment Information Request Form
NPDES OR NONDISCHARGE PERMITTING UNIT COMPLETES THIS PART:
Date of Request 7/18/2005
Facility
City of Lenoir, Gunpowder Creek WWTP
Permit #
NC0023736
Region
Asheville
Requestor
Toya Fields
Pretreatment- Dana Folley (ext. 523)
Contact G-M Towns- Jon Risgaard (ext. 5 0
—N Z Towns- Deborah Gore (ext. 5
COMMENTS TO PRETREATMENT UNIT:
PRETREATMENT UNIT COMPLETES THIS PART:
Status of Pretreatment Program (circle all that apply)
1) the facility has no SIU's and does have a Division approved Pretreatment Program that is INACTIVE
2 the facility has no SIU's and does not have a Division approved Pretreatment Program
3) he facility has (or is developing) a Pretreatment Program
3a) is Full Program with LTMP or 3b) is Modified Program with STMP
4) the facility MUST develop a Pretreatment Program - Full Modified
5) additional conditions regarding Pretreatment attached or listed below
Flow Permitted MGD Actual MGD
Industrial 0, 2 7 S 6, ay k �e •..
STMP time frame:
most recent
,.I
V '.0 ��1 !
next cycle
O.o C �t Ak—
L
(S)
T
MP
Pollutant
Check List
POC due to
NPDES/Non-
Discharge
Permit Limit
Required
by EPA'
Required by
503 Sludge—
POC due to SIU"'
Site specific POC (Provide Explanation)""
STMP
Frequency
effluent
V
at
LTMP
Frequency at
effl t
BOD
y
X
4
*. M
TSS
X
X
4
0 M
NH3
X
Y
4
• M
-
Arsenic
X
4
u M
--'d
Cadmium
X
-V
X
Y
4
u M
.---'/
Chromium
X
'1
y
Y
4
00 M
I
Copper
X
q
A
X
4
N M
Cyanide
X
4
0 M
-'I
Lead
X
q
X
X
Y
4
S M
-
Mercury
y
y
4
1 0 M
-
Molybdenum
y
4
• M
-I
Nickel
X
-V
Y
X
4
0. M
Silver
h
X
4
0, M
Selenium
A
X
X
4
• M
-'l
Zinc
X
Ni
X
/1
4
0. M
—
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version 10/8103
N PDES_Pretreatment. request. form.031008
Revised: August 4, 2000

City of Lenoir
Public Works Department
Water Resources Division
Gunpowder Creek
P.O. Box 958
Lenoir, North Carolina 28645
July 28, 2004
Mrs. Valery Stephens
NC DENR / Division of Water Quality
Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: Permit Renewal Request for the City of Lenoir — Gunpowder
Creek WWTP (Permit # NC0023736) and Sludge Management
Plan for the Facility
Dear Mrs. Stephens:
The City of Lenoir would like to request renewal of the NPDES wastewater
discharge permit for the Gunpowder Creek VVWTP (Permit # NC0023736).
The current permit expires on January 31, 2005.
There have been no major changes at the facility since issuance of the last
permit (effective date January 1, 2001). In the previous permit, one
mistake was found on the longitudinal coordinates of the outfall. Those
coordinates were listed as 82°27'45", which is approximately 67 miles west
of the correct coordinates, 81 °27'49". This location is noted on the
enclosed topographic map.
Sludge generated at the facility is wasted to the aerobic digester, which
under normal operation has diffused air provided. The digester air blower
is turned off when supernating is required. When the digester reaches a
high level, again the air is turned off and the sludge is pumped to a tanker
truck for hauling to the Lower Creek WWTP Biosolids Facility. This sludge
is discharged into the sludge -pumping pit within the plant, and is pumped
into the sludge holding tank, where it is co -mingled with Lower Creek
WWTP sludge and Lenoir Water Plant alum sludge.

The Lower Creek WWTP Biosolids Facility is a "Class A" sludge treatment
facility, which currently utilizes lime stabilization and pasteurization
processes. Sludge from the holding tank is pumped onto a belt press at
approximately 2% solids content. The press discharge is about an 18%
solids cake. This sludge cake is augured into a thermoblender, where
quicklime is fed and heat is applied. After this heating and mixing step, the
product drops into the pasteurization vessel, where it is heated to at least
158°F for thirty minutes. The final product, called "Lenoir Blend" is
conveyed to a dump truck, which dumps the biosolids onto a storage pad.
Lenoir Blend is given to local farmers or is spread directly onto their fields
by city personnel and city spreader truck. Sludge analysis on this final
product is generally conducted four times per year, and includes nutrients,
metals and fecal coliform bacteria.
If you require any other information, please call me at 828-757-2198.
Thank you for your assistance.
Sincerely,
/1e4Vd
Monte L. Wall
Superintendent Wastewater Treatment
City of Lenoir

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Projection is UTM Zone 17 NAD83 Datum
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