NC0020834_Permit (Issuance)_20001230

NPDES DOCUMENT SCANNING COVER SHEET
NC0020834
Warrenton WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Compliance
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
December 30, 2000
This document is printed an reuse paper - ignore any
content on the resrerse side

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
December 30, 2000
Mr. Dennis M. Wilson, Superintendent
Town of Warrenton
P.O. Box 281
Warrenton, North Carolina 27589
NCDENR
Subject: NPDES Permit
Warrenton WWTP
Permit No. NC0020834
Warren County
Dear Mr. Wilson:
In accordance with the application for discharge permit, the Division is forwarding
herewith the subject NPDES permit. This permit is issued pursuant to the requirements of North
Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina
and the U.S. Environmental Protection Agency dated May 9, 1994.
The Division received your comments dated November 17, submitted on behalf of the
county, regarding the increased nutrient sampling requirement. The Division has modified the
weekly testing requirement for total nitrogen and total phosphorus. The increased monitoring
shall not commence until July 2001 to allow the county time to budget the weekly frequency. This
monitoring is necessary due to the continued concerns of nutrient loading to the Tar Pamlico River
Basin. Should the county find consistent minimal results for total nitrogen or total phosphorus,
the Division may modify the requirement at the next permit renewal. The county may also wish to
discuss the weekly monitoring requirement during the next negotiated agreement between the
Division and the Tar Pamlico Association in 2004.
If any parts, measurement frequencies, or sampling requirements contained in this permit
are unacceptable to you, you have the right to an adjudicatory hearing upon written request
within thirty (30) days following receipt of this letter. This request must be in the form of a
written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed
with the office of Administrative Hearings, Mail Service Center 6714, Raleigh, North Carolina
27699-6714. Unless such a demand is made, this permit shall be final and binding.
Please take notice that this permit is not transferable except after notice to the Division of
Water Quality. The Division of Water Quality may require modification or revocation and
reissuance of the permit.
This permit does not affect the legal requirements to obtain other permits which may be required
by the Division of Water Quality, the Division of Land Resources, the Coastal Area Management Act, or
any other federal or local governmental permit.
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/ 10% POST -CONSUMER PAPER
VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES

If you have any questions regarding the final NPDES permit, please contact Susan Wilson
at (919) 733 - 5083, extension 510.
Sincerely,
Original Signed By
.David &t Goodrich
cc: Raleigh Regional Office/Water Quality Section
Central Files
Point Source Compliance and Enforcement Unit
NPDES Unit
Aquatic Toxicology Unit
EPA Region 1V, Roosevelt Childress

Permit No. NC0020834
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 provisions of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Water Quality Commission, and the
Federal Water Pollution Control Act, as amended,
Town of Warrenton
is hereby authorized to discharge wastewater from a facility located at
Warren County Wastewater Treatment Plant
Off US Highway 401
Southwest of Warrenton
Warren County
to receiving waters designated as Fishing Creek in the Tar -Pamlico River Basin
in accordance with the discharge limitations, monitoring requirements, and other conditions set forth in
Parts I, II, III. and IV hereof.
This permit shall become effective February 1, 2001.
This permit and the authorization to discharge shall expire at midnight on October 31, 2004.
Signed this day December 30, 2000.
Original Signed By
David A. Goodrich
Kerr T. Stevens, Director
Division of Water Quality
By the Authority of the Environmental Management Commission

Permit No. NC0020834
SUPPLEMENT TO PERMIT COVER SHEET
Town of Warrenton
Warren County Wastewater Treatment Plant
is hereby authorized to:
1. Continue to operate an existing 2 MGD wastewater treatment facility consisting of:
• Influent pump station,
• ar screen, 5
• �rit chamber,
• Dual oxidation ditches,
• Dual clarifiers, 0.
5
• Caeaeration.►A`i
�
• Gas chlorination, o ,, fC c
• pRchlorination (sulfur dioxide),
• C96Pnt aeration,
• Chemical feed facilities,
• Aerobic digesters, (--ivo)
• Sandrr((��� drying beds,
'P`CCil(6-.k : (6 ) Y le_A 4
located at the Warren County Wastewater Treatment Plant, off US Highway 401,
southwest of Warrenton, Warren County, and
2. Discharge wastewater from said treatment works at the location specified on the
attached map into Fishing Creek which is classified C-NSW waters in the Tar Pamlico
River Basin.
Warren County WWTP
NPDES No. NC0020834

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Latitude: 30'22'47"
Longitude: 78°10'07"
Receiving Stream: Fishing
Creek
Stream Class: C NSW
Subbasin: 030304
NC0020834
Warrenton WWTP
•
0305)
•
_ 410
S,ibstat
131.
•
renion �_50
/•
•
,'S"'...•••--
SCALE 1:24000

A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
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 specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location*
Flow
2 MGD
Continuous
Recording
Influent or Effluent
BOD, 5 day, 20°C1
(April 1 - October 31)
9 mg/I
13.5 mg/I
3/week
Composite
Influent & Effluent
BOD, 5 day, 20°C1
(November 1 - March 31)
18 mg/I
27 mg/I
3/week
Composite
Influent & Effluent
Total Suspended Solidsl
30 mg/I
45 mmgg/l
-,�
3/week
Composite
Influent & Effluent
NH3 as N
(April 1 - October 31)
2.0 mg/I
1
3/week
Composite
Effluent
NH3 as N
(November 1 - March 31)
4.0 mg/I(
,'
3/week
Composite
Effluent
PIA
-
3/week
Grab
Effluent
Dissolved 0xygen3
-3/week!`
Grab
Effluent,
Upstream & Downstream
Fecal Coliform
eometric mean
(g )
200/100
ml
400/100
ml
31week-
UG r ', c l�
Grab
Effluent
--�
`�Rstraowr�stream -
Effluent
Total Residual Chlorine
28 ug/I
3/week
Grab
Temperature °C
7-: =-t,.,,
Daily
\JQ r :...-t l€
Grab
Effluent,
Upstream & Downstream
Total Nitrogen 4_ .
(NO2 + NO3 + TKN)
Through June 30. 2001 -
Monthly
Composite
Effluent
- `��
Total Nitrogen
(NO2 + NO3 + TKN)
Beginning July 1, 2001
Weekly
Composite
Effluent
Total Phosphorus 4
Through June 30, 2001
--'�� _
Monthly
Composite
Effluent .�__ .
Total PhosphorusX
Beginning July1, 2001
Weekly
Composite
Effluent
Chronic Toxicity&
Quarterly
Composite
Effluent
Copper
Quarterly
Composite
Effluent
Zinc
Quprterly
Composite
Effluent
Footnotes continued on next page.
e •
Warren County WWTP
NPDES No. NC0020834

Notes:
• Upstream at least 100 feet. Downstream at NCSR 1600. Stream samples shall be grab
samples and shall be collected 3/Week during June -September and 1/Week during the
remaining months of the year.
The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not
exceed 15% of the respective influent value (85% removal).
2 The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
3 The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/1.
4 See Special Condition A.(3.) regarding nutrients. Note that weekly monitoring for total
nitrogen and total phosphorus shall commence during the month of July 2001.
5 Chronic Toxicity (Ceriodaphnia) P/F at 76% March, June, September, and December; see
Supplement to Effluent Limitations and Monitoring Requirements, Special Condition A (2).
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Warren County WWTP
NPDES No. NC0020834

A (2). CHRONIC TOXICITY PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit observable inhibition of reproduction or significant
mortality to Ceriodaphnia dubia at an effluent concentration of 76%.
The permit holder shall perform at a minimum, auarterlti 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: North Carolina Division of Water Quality
Environmental Sciences Branch
1621 Mail Service Center
Raleigh. North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Branch no later
than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete. accurate, include all supporting chemical/physical measurements and all
concentration/response data, and be certified by laboratory supervisor and ORC or approved designate
signature. Total residual chlorine of the effluent toxicity sample must be measured and reported if
chlorine is employed for disinfection of the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the
report with the notation of "No Flow" in the comment area of the form. The report shall be submitted to
the Environmental Sciences Branch at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required.
monitoring will be required during the following month.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Water Quality indicate potential impacts to the receiving stream, this permit may be re-
opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival, minimum control organism reproduction, and appropriate environmental controls,
shall constitute an invalid test and will require immediate follow-up testing to be completed no later
than the last day of the month following the month of the initial monitoring.
Warren County WWTP
NPDES No. NC0020834

A. (3.) NUTRIENT LIMITS SPECIAL CONDITION
Limits on total phosphorus and total nitrogen have not been included at this time because the
facility is participating in the nonpoint source trading option outlined in the Tar Pamlico NSW
Implementation Strategy Phase II, which was adopted December 8, 1994. If compliance with any
element of this strategy, or subsequent approved revisions to the strategy is not maintained, the
Division reserves the right to reopen this permit to include nutrient limits. If requirements other
than those listed in this NADES permit are adopted as part of a future revision to the strategy, the
Division reserves the right to reopen this permit to include these requirements.
Warren County WWTP
NPDES No. NC0020834

Re: warronton
Subject: Re: warrenton
Date: Thu, 30 Nov 2000 08:53:07 -0500
From: Rich Gannon <[e-mail]>
Organization: NC DENR DWQ
To: Susan Wilson <[e-mail]>
You know, the Agreement is explicit that weekly monitoring is required, but
you can save up your samples and analyze monthly. But it also says we can
authorize less frequent monitoring where the discharger shows that it is
"adequate to characterize facility loadings". I recall seeing old
correspondence in the files that gave me the idea this was a hot issue in
the early days. Also, at one point I was looking at hard copies of DMR's
for something and found facilities routinely giving values for N and P only
twice a month, you know, where they report parameters each day on the
form. My suggestion would be to talk to Paul Blount first, then Ron Elks
if need be for a historical perspective. It may be that we acquiesced to
biweekly for all, or for the little guys only. Best I can tell you on
that.
-Rich
Susan Wilson wrote:
> hey, i received comments from warrenton (in the tar pam and in the
> association). they had some objections to weekly monitoring for TP and
> TN. i thought they had to do that anyway for the association? do you
> have in your records how frequently they monitor for the association?
Richard Gannon
Nonpoint Source Water Quality Planner
NC Division of Water Quality
1617 Mail Service Center, Raleigh NC 27699-1617
[phone] ext. 356
FAX [phone]
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1 of 1
11/30/00 9:06 AM

TOWN OF
WIUIRENTON
Warren Co. WWTP
Phone: [phone]
FAX: [phone]
email:
Friday, November 17, 2000
EMC/NPDES Unit
1617 Mail Service Center
Raleigh NC 27699-1617
Dear Ms. Wilson,
this letter is in response to the recent draft NPDES permit received by my office
11-17-00 .
After careful review of the draft permit ,I must say I was pleased with the
divisions decision to eliminate the cadmium, lead, and MBAS from the proposed permit,
however I was not as pleased with the divisions decision to change my now monthly total
nitrogen, total phosphorus to the proposed weekly.
I understand the divisions concern to have more data on these parameters ,but its
my job to try to keep us within our set budget .Other than toxicity, TN is the most
expensive analysis that we have to run, and to go from a cost of $ 450/yr to $1872 /yr is a
little extreme to me . I am therefore submitting the request to have our TN monitoring
frequency reviewed again with the hope that the division will adjust the frequency to no
more than 2/month. As for the total phos. after a years review of the phos. data I found 1,
that we average on a regular yearly basis <1.0 mg/1 , I just don't see the justification for)
increasing phos. monitoring at all,we are already currently spending $ 172.00/yr and your
proposed changes would increase that $ 576 we don't have any high industrial flows that
would contribute large quantities of phos. to our incoming waste so again I urge you to
reconsider this change.
In closing I would like to add ,I appreciate any attention you would show to my
above mentioned concerns and hope that if you have any questions regarding this letter
please feel free to contact me at 252 257-1776.
: Nc oo ,? /
Sincerely,
Dennis M. Wilson
Nov 2 8 2000 I
BENR - W1fER QUALITY
POINT SOURCE BRANCH

[Fwd: [Fwd' Permits noticed last week]]
�1 o Cwv-0-1047, FiOM
Subject: [Fwd: [Fwd: Permits noticed last week]] o i $
Date: Thu, 16 Nov 2000 07:36:16 -0500
From: Randy Jones <[e-mail]>
To: Ted Cashion <[e-mail]>, Tim Baldwin <[e-mail]>
CC: Susan A Wilson <[e-mail]>, Kirk Stafford <[e-mail]>,
JENNE SOWELL <[e-mail]>,
Bob Mangum <[e-mail]>
Please see the message below from Susan Wilson. I have passed the
Warrenton draft NPDES permit to Tim and the Tarboro draft NPDES permit
to Ted since they did the last inspection. Ted and Tim, please review
and sign off on the Fact Sheet with any comments and return to me.
Please call Susan with any concerns, etc. Kirk, Jenne, and Bob please
check with Ted and Tim if you would like to review these permits.
Thanks, Randy
Subject: [Fwd: Permits noticed last week]
Date: Wed, 15 Nov 2000 10:47:16 -0500
From: ken <[e-mail]>
To: Randy Jones <[e-mail]>
Subject: Permits noticed last week
Date: Wed, 15 Nov 2000 09:52:00 -0500
From: Susan Wilson <[e-mail]>
To: Ken Schuster <[e-mail]>, Tom Poe <[e-mail]>
Goodmorning!
I noticed a couple of major permits last week (I inherited these and
last week was the drop dead date to get them noticed/issued by the end
of the year). Anyway, my apologies for not being able to get these to
you prior to notice (got them on Monday and noticed on Wednesday, so I
didn't have a chance).
I've enclosed copies of the permits and fact sheets. Please pass to
appropriate staff and have them call or e-mail me if there are any
glaring errors. Thanks for your help. Tom, I didn't have any headworks
info. for these facilities so I'd like to get that and make any changes
as necessary.
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[Fwd: [Fwdt Permits noticed last week]]
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2 of 2 12/6/00 11:20 AM

Toxicant Analysis/FCoWASA
Facility Name
Warrenton
Parameter =
Cd
Pa
NPDES #
NC0020834
Standard =
2
pg/I
6
Qw (MGD)
2
7Q10s (cfs)
1
n
BDL=1/2DL4ctual
Data
RESULTS
/WC (%)
75.61
1
2.5
<5
Std Dev.
0.323310403
c'ving Stream
Fishing Creek
2
2.5
<5
Mean
1.071428571
Stream Class
C NSW
3
1
<2
C.V.
0.301756376
4
1
<2
FINAL RESULTS
5
1
<2
Cd
6
1
<2
Mult Facto
1.4
Max. Pred Cw
3.5
ug/1
7
1
<2
Max. Valuc
2.5
pg/
Allowable Cw
2.6
ug/I
8
1
<2
Max. Pred
3.5
pg/
Max. Value
2.5
9
1
<2
Allowable (
2.65
pg/
Cu
10
1
<2
1 120
Max. Pred Cw
34
ug/1
11
1
<2
Allowable Cw
Aff"1. 9.3
ug/I
12
1
<2
r'�f5_—
Max. Value
17
13
1
<2
Pb (lead)
14
1
<2
DLOPP+:'1)
ibkai $e
Max. Pred Cw
16.1
ug/I
15
1
<2
Allowable Cw
Jf 33.1
ug/I
16
1
<2'
tik
Max. Value
7
17
1
<2
< *1)'
MBAS
18
_ 1
<2
' )
Max. Pred Cw
7600
ug/
19
1
<2
Allowable Cw
661.3
ug/I
20
1
<2
Max. Value
Ni; Nrres� 1000
21
1
<2
Cr
22
1
<2
I1ax. Pred Cw
ug/I
23
1
<2
Allowable Cw
uy /I/l
24
1
<2
Max. Value
25
1
<2
Hg
26
1
<2
Max. Pred Cw
ug/I
27
1
<2
Allowable Cw
ug/
28
1
<2
Max. Value
29
1
<2
Cu(AL)
30
1
<2
Max. Pred Cw
ug/I
31
1
<2
Allowable Cw
ug/1
32
1
<2
Max. Value
33
1
<2
Zn(AL)
34
1
<2
Max. Pred Cw
ug/k
35
1
<2
Allowable Cw
ug/1
36
1
<2
Max. Value
37
1
<2
Ag(AL)
38
1
<2
Max. Pred Cw
ug/k
39
1
<2
Allowable Cw
40
1
<2
Max. Value
41
1
<2
As
42
1
<2
Max. Pred Cw
ug/1 43
11/8/00 1

Toxicant Analysis/FCoWASA
- meter =
Cu
11erameter =
Pb (lead)
tandard =
7
(AL) pg/I
::Standard =
25
pg/I
n
DL=1/2D
Actual Data
RESULTS
n3DL=1/2D
Actual Data
RESULTS
1
17
17
Std Dev.
3.95751
1
7
7
Std Dev.
1.1266
2
7
7
Mean
7.52381
2
5
<10
Mean
1.25
3
11
11
C.V.
0.526
3
1
<2
C.V.
0.9013
4
15
15
4
1
<2
5
5
5
5
1
<2
6
8
8
Mult Facto
2
6
1
<2
Mult Factor =
2.3
7
5
<10
Max. Value
17
gkli 7
1
<2
Max. Value
7
pg/I~
pg/(iiiiiii
8
7
7
Max. Pred
34
pgkii 8
1
<2
Max. Pred Cv
16.1
9
8
8
Allowable •
9.26
g/iili 9
1
<2
Allowable Cw
33.06
pg/iililii
10
1
<2
10
1
<2
11
6
6
i pal
III
11
1
<2
12
10
10
12
1
<2
V90P-_
13
3
3
1111rMI
13
1
<2t
14
4
4
��Qs/gig15
14
1
<2
15
7
7
1
<2
16
9
9
16
1
<2
17
11
11
17
1
<2
18
4
41
18
1
<2
19
5
5
19
1
<2
20
11
11
20
1
<2
21
4
4
21
1
<2
22
1
<2
-__-
23
1
<2
24
1
<2
--
�_
25
1
<2
--
-_
26
1
<2
27
1
<2
--
--
--
-_
-_
-_
28
1
<2
29
1
<2
30
1
<2
31
1
<2
32
1
<2
34
1
<2
�-
34
1
<2
-
-_
35
1
<2
-_
--
-_
-_
36
1
<2
37
1
<2
-
-_
38
1
<2
39
1
<2
40
1
<2
11/8/00
2

Toxicant Analysis/FCoWASA
irameter =
MBAS
itandard =
500
pgll
n
DL=1/2D
Actual Data
RESULTS
1
310
310
Std Dev.
284.974
2
100
<200
Mean
211
3
100
<200
C.V.
1.35059
4
100
<200
5
100
<200
6
100
200
Mult Facto
7.6
7
1000
<2000
Max. Valu
1000
pg/I
8
100
<200
Max. Pred
7600
pg/1
9
100
<200
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NC DENR - DIVISON OF WATER QUALITY 2B . 0300
.0316 TAR-PAMLICO RIVER BASIN
Name of Stream
Description
Class
Classification
Date Index No.
Devils Cradle
Creek
Richland Creek
Crabtree Creek
Sandy Creek
Deer Branch
Shelley Branch
Red Bud Creek
Tumbling Run
Terry Branch
Jumping Run
Gideon Swamp
Flat Rock Branch
Mill Pond Branch
Giles Branch
Lane Swamp
Moccasin Creek
Swift Creek
Whiteoak Swamp
Whiteoak Swamp
Fishing Creek
Matthews Creek
Long Branch
Rocky Creek
Owens Creek
Phoebes Creek
Horse Creek
Bridle Creek
Richneck Creek
Possumquarter Creek
Black Branch
Wolfpit Branch
Mill Branch
Gum Pond Branch
Buffalo Creek
Long Branch
Reedy Branch
Gunters Creek
From source to Flatrock
Creek
From source to Sandy Creek
From source to Richland
Creek
From N.C. Hwy. 561 to Swift
Creek
From source to Sandy Creek
From source to Sandy Creek
From source to Sandy Creek
From source to Sandy Creek
From source to Tumbling Run
From source to Tumbling Run
From source to Swift Creek
From source to Swift Creek
From source to Flat Rock
Branch
From source to
From source to
From source to
Swift
Swift
Swift
Creek
Creek
Creek
From a point 1.4 miles
upstream of Edgecombe
County SR 1409 to Tar River
From source to a point 1.8
miles upstream of Edgecombe
County SR 1428
From a point 1.8 miles
upstream of Edgecombe
County SR 1428 to Swift Cr.
From source to Shocco Creek
From source to Fishing Creek
From source to Matthews
Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
From source to Fishing Creek
9
B NSW
B NSW
B NSW
C NSW
C NSW
C NSW
C NSW
C NSW
C NSW
C NSW
C NSW
C NSW
C NSW
C NSW
C NSW
C NSW
WS-IV NSW
C NSW
WS-IV NSW
C
C
C
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
NSW
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
08/03/92
01/01/90
08/03/92
08/03/92
08/03/92
08/03/92
08/03/92
08/03/92
08/03/92
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
01/01/90
28-78-1-12-1
28-78-1-13
28-78-1-13-1
28-78-1-(14)
28-78-1-15
28-78-1-16
28-78-1-17
28-78-1-18
28-78-1-18-1
28-78-1-18-2
28-78-2
28-78-3
28-78-3-1
28-78-4
28-78-5
28-78-6
28-78-(6.5)
28-78-7-(1)
28-78-7-(2)
28-79-(1)
28-79-2
28-79-2-1
28-79-3
28-79-4
28-79-5
28-79-7
28-79-8
28-79-9
28-79-10
28-79-11
28-79-12
28-79-13
28-79-14
28-79-15
28-79-16
28-79-17
28-79-18

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0020834, Warren County Wastewater Treatment Plant
Facility Information
Applicant/Facility Name:
Town of Warrenton/Warren County WWTP
Applicant Address:
P.O. Box 281, Warrenton, NC 27589
Facility Address:
Off US Highway 401
Permitted Flow
2.0 MGD
Type of Waste:
- 10% Ind., --90% Domestic
Facility/Permit Status:
Renewal
County:
Warren
Miscellaneous
Receiving Stream:
Fishing Creek
Regional Office:
RRO
Stream Classification:
C-NSW
SI: 28-79-(1)
USGS Topo Quad:
B26NW
Warrenton
u d
303(d) Listed?:
NO
Permit Writer:
S. Wilso
Subbasin:
030304
Date:
Novemb
9, 000
Drainage Area (mi2):
51.9
Summer 7Q10 (cfs)
1
Winter 7Q10 (cfs):
8.9
Average Flow (cfs):
46.7
IWC (%):
76
Primary SIC Code:
4952
SUMMARY
The Town of Warrenton operates a 2 MGD facility for Warren County. The discharge is Fishing
Creek, which is classified as C-NSW.
As part of the Tar Pamlico Basin Association, no nutrient limits have been added to this
renewal, but monitoring for TP and TN has been increased to weekly. Also, special condition
language relating to potential nutrient limits has been added to the permit.
This creek is not listed on the state's 303d list (but the Tar -Pamlico basin does have a nutrient
management strategy).
TOXICITY TESTING:
Current Requirement: Chronic P/F ® 76% (also recommended with renewal)
Warren County has experienced some failures in 1999, followed by passes.
COMPLIANCE SUMMARY: BASED ON THE PREVIOUS 2 YEARS
A review of the Town's compliance printout indicates no monthly limit excursions in the
previous 2 years. The facility is averaging - 0.53 MGD effluent flow and is under BOD5 and
NH3-N limits.
TOXICANT PARAMETERS
A reasonable potential analysis (RPA) was conducted for toxicants currently monitored in the
permit [Cadmium, copper, lead, and MBAS).
Cyanide, lead, and MBASwi11 be eliminated with this permit cycle due to the lack of reasonable
potential to exceed the WQ standard. Cyanide values were reported below detect level, as was
MBAS (below DL or below the allowable level). Lead was below the allowable level.
Copper will be continued as a quarterly monitoring requirement and Zinc has been added due
to their ubiquitous nature and EPAs. [Further pretreatment information may necessitate a
reduction in monitoring].
Warren County WWTP
NPDES Renewal
Page 1

INSTREAM MONITORING:
Warrenton is performing its own instream monitoring and is not part of a monitoring coalition
at this time. DO values appeared at or below 5 mg/1 for the previous 2 years.
PROPOSED CHANGES:
Warrenton is part of the Tar Pamlico Nutrient Trading Association and will not
receive nutrient limits with this renewal. Monitoring for TP and TN has been
increased to weekly, to coincide with the Association's requirement.
Toxicant parameters modified as stated previously.
Chronic toxicity language incorporates the new enforcement policy language.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: Public Notice by November 15, 2000 (est.)
Permit Scheduled to Issue: by the end of the year
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contact Susan Wilson at [phone] ext. 510.
REGIONAL OFFICE COMMENT:
[Regional comments to follow notice and be incorporated as necessary. No adverse comments
noted in the staff report for this facility] .
NAME: DATE:
Warren County WWTP
NPDES Renewal
Page 2

ocT -
SOC Priority Project Yes No XXX
DENR - WATER 4pAH
POINT SOOP,C,E B ' NC
To: Permits and Engineering Unit
Water Quality Section
Attention: Charles H. Weaver, Jr.
Date September 21, 1999
NES STAFF REPORT AND RECOMMENDATION
County Warren
Permit No. NC0020834-- RENEWAL
PART I - GENERAL INFORMATION
1. Facility and Address: Town of Warrenton
Warren County Wastewater Treatment Plant
P.O.Box 281
Warrenton, NC 27589
2. Date of Site Visit: March 09, 1999
3. Report Prepared by: Mitch Hayes, Environmental Technician
4. Persons Contacted and Telephone Number:
Dennis M. Wilson,Superintendent
252-257-1176
5. Directions to Site: From Raleigh: U.S. 401 North to one mile
south of Warrenton. Turn left into Waste Treatment Plant road and
proceed to end of road.
6. Discharge Point(s), List for all discharge points:
Latitude: 36°22'48" Longitude: 78°10'08"
Attach a USGS map extract and indicate treatment facility
site and discharge point on map.
U.S.G.S. Quad No. B26NW U.S.G.S. Quad Name Warrenton, NC

7. Site size and expansion area consistent with application ?
XXXX Yes No If No, explain:
8. Topography (relationship to flood plain included): Plant
appears to be located very close to a flood plane according
to FEMA, FIRM map 370396 0003
9. Location of nearest dwelling: Approximately 1 mile.
10. Receiving stream or affected surface waters: Fishing Creek
a. Classification: C NSW
b. River Basin and Subbasin No.: 03:03:04
c. Describe receiving stream features and pertinent
downstream uses: Water supply for Rocky Mount and
Tarboro.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: MGD(Ultimate
Design Capacity) 2.00 MGD
b. What is the current permitted capacity of the Waste
Water Treatment facility? 2.00 MGD
c. Actual treatment capacity of the current facility
(current design capacity)? 2.00 MGD
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: ATC issued for construction of a dechlorination
unit.Engineer cerififcation received 06/07/99.
e. Please provide a description of existing or
substantially constructed wastewater treatment
facilities: The existing treatment facilities consist
of an influent pump station, bar screen, grit
chamber,dual oxidation ditches, dual clarifiers,cascade
aeration, gas chlorination , dechlorination (sulfur
dioxide) post aeration,chemical feed facilities, drying

beds, aerobic digesters.
f. Please provide a description of proposed wastewater
treatment facilities: NA
g. Possible toxic impacts to surface waters: Chlorine
appears to be the only possible toxic component but
this parameter is not expected to be a problem when the
dechlorination unit comes on line.
h. Pretreatment Program (POTWs only):
in development
approved
should be required
not needed XXXXX
2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DEM
permit no. W00000838
Residuals Contractor- Granville Farms
Telephone No. 919-693-3253
b. Residuals stabilization: PSRP XXXX
PFRP Other
c. Landfill:
d. Other disposal/utilization scheme (Specify):
3. Treatment plant classification (attach completed rating
sheet): Class III as of April 07,1999.
4. SIC Code(s): 4952
Wastewater Code(s) of actual wastewater, not particular
facilities i.e.., non -contact cooling water discharge from a
metal plating company would be 14, not 56.
Primary 01 Secondary --
Main Treatment Unit Code: 106-3
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant

Funds or are any public monies involved. (municipals only)? NA
2. Special monitoring or limitations (including toxicity)
requests: When the dechlorination system comes on line,there is
no need to monitor chlorine. I recommend that chlorine monitoring
be dropped on the new permit.
3. Important SOC, JOC or Compliance Schedule dates: (Please
indicate) NA
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non -discharge options available. Please provide
regional perspective for each option evaluated.
Spray Irrigation: NA
Connection to Regional Sewer System: NA
Subsurface: NA
Other disposal options: NA
5. Other Special Items: See evaluations and recommendations.

PART IV - EVALUATION AND RECOMMENDATIONS
We have reviewed the submitted application and recently performed
a Compliance Evaluation Inspection. The facility is in the
process of installing a dechlorination system. W is
b c�ht— ���r e�omrrr r el- a mon dro d
oa_ie w permit .
We recommend that the permit be reissued in accordance with the
basinwide plan, with parameters and frequencies associated with a
Class III, domestic wastestream, municipality.
lCOA
c
Signature of report eparer
Water Quality Regional Supervisor
Date
9/2

TOWN OF
WPJIRENTON
Phone:
TOWN OF WARRENTON FAX:
email:
Thursday, July 1, 1999
Charles H. Weaver, Jr
NC DENR/Water Quality/NP DES Unit
1617 Mail Service Center
Raleigh,NC 27699-1617
1
1
JUL'9 1999
DENR - WATER QUALITY
POINT SOURCE BRANCH
Dear Mr. Weaver,
this letter is in reference to our current NPDES permit NC0020834, which will
expire February 29,2000.
To satisfy the requirement of the renewal package this letter is to serve as official
notice for the Town Of Warrenton's request for renewal of said permit.
If you have any questions regarding this matter please feel free to contact me at
[phone].
Sincerely,
Dennis M. Wilson
WWTP Superintendent
TOWN OF WARRENTON

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TERITIARY✓"�
FILTERS
POST AERATION
WASTEWATER
PUMP
STATION
EFFLUENT
PARSHALL
FLUME
FISHING CREEK
MACTjANICAL
BAR SCREEN
GRIT ----
RE MOVAL
FACILITY
INFLUENT
CHLORINE FEED AND/
HANDLING SYSTEM CLARIFIERS..
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SLUDGE
RECIRCULATION
AND WASTE
PUMP STATION
M
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BACKWASH
WASTE
PUMP
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VACUUM
SLUDGE
DRYING BEDS
WASTE
SLUDGE
M
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SLUDGE
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EXHIBIT. I-1
OXIDATION DITCHES
L LIME FEED SYSTEM
BED UNDERDRAINAGE
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SLUDGE DRYING '
BEDS (CONVENTIONAL)
SCHEMATIC FLOW (PATTERN OF WASTEWATER
AND SLUDGE ' AT WARREN COUNTY WASTEWATER TREATMENT PLANT

Sludge Handling Plan
The sludge generated at the plant is wasted to aerobic digesters, where it is aerated until it is
suitable for land application. The sludge is then hauled away by Granville Farms of Oxford NC
and applied to land.
Vector Attraction
sludge residuals are raised to 12 or higher by the addition of lime and remains at 12 or higher for
2 hours and then at 11.5 or higher for an additional 22 hrs.
PSRP
the psrp consist of the agitating of residuals with air to maintain aerobic conditions of a mean
cell residence time between 40 days at 20 degrees Celsius and 65 days at 15 degrees Celsius
before being land applied.

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