NC0026921_NPDES Draft Permit_20091021

AAVA
NCDENR
North Carolina Department of Environment and Natural Resources
Division. of Water Quality
Beverly Eaves Perdue. Coleen H. Sullins _. Dee Freeman
Governor Director Secretary
Larry Hagin, Mayor
Town of Parkton
P.O. Box 55, 28 West David Parnell Street
Parkton, North Carolina 28371
Dear Mayor Hagin:
D�l i c t tl L 1,
7F1
October 21, 2009
LEI
Subject: NPDES Permit - DRAFT Review
Permit No. NC0026921
Town of Parkton WWTP, Grade II
NCSR 1724, southeast of Parkton
Robeson County
In response to your request to renew the subject NPDES permit, the Division of Water Quality (DWQ or the
Division) hereby transmits this permit draft for your review. Simultaneously, the Divisioff is submitting
notice to newspapers in the general Robeson County area, as required. Please note the following changes
_from your previous permit:
• Mercury. The Division has added a permit limit for mercury (12ng/L) because the data show
reasonable potential to exceed the water -quality standard. We based this decision on 13 quarterly
samples dating from 2006 to 2009. Per NPDES guidance, the Division has also increased the
monitoring frequency from 1/Quarter to 1/Month.
• Total Residual Chlorine (TRC). You are required to monitor for TRC only if you use chlorine
to disinfect; your TRC permit limit continues to be 17 µg/L. However, because of difficulties
quantifying TRC in a wastewater matrix, the Division will consider all values reported below
50 µg/L to be compliant with this permit [see footnote, permit Section A. (1.)].
Following the mandatory 30-day public comment period, the Division will review all pertinent comments
and take appropriate action prior to issuing a final NPDES permit. If you have • uestions concerning this
draft permit, please contact me by e-mail [[e-mail]], or c. meat [phone].
espectf
1
orporon, .G.
NPDES Progr. , East
Enclosure: NPDES Permit NC0022921 RAFT)
cc: Fayetteville Regional Office/Sur : ce Water Protection:Section, Attn: Mark Brantley
[draft permit, Fact Sheet, and -rmit application]
NPDES Program Files [ • draft permit and Fact Sheet]
PERCs Unit [email draft • ermit and Fact Sheet] AT . • bra' 1 U!A-C—
Technical Assistance and Certification Unit, Attn. Steve Reid [email draft permit and Fact Sheet]
Aquatic Toxicology Unit, Attn: Susie Meadows [email draft permit and Fact Sheet]
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Location: 512 N. Salisbury St. Raleigh, North Carolina 27604
Phone: [phone] FAX: [phone] Customer Service: 1-877-623-6748
Internet: www.ncwaterquality.org
An Equal Opportunity \ Affirmative Action Employer
Nne
orthCarohna
-Naturally

Permit NC0026921
• 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
(NPDES)
In compliance with the provision of North Carolina General Statut/eX437215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Cdttix1 Act as amended, the
is hereby authorized to discharge wastewater fro facilify�located�the
'ar�kto`��{\WWTP
NCS"R4 72. ouckeast/Ofaricton)
Roberson County
to receiving waters desi
limitations, monitoring rei u
Marsh in the Lumber River Basin in accordance with effluent
othe ' onditions set forth in Parts I, II, III and IV hereof.
This permit shall become effective\\ j , 2009.
This permit and authorization to discharge shall expire at midnight on July 31, 2014.
Signed this day , 2009.
Coleen H. Sullins, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit NC0026921
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.
The Town of Parkton
is hereby authorized to:
1. Continue to operate an existing 0.2 MGD wastewater treatm9t4\orlcs consisting of:
• manual bar screen
• two oxidation ditches (operated as parallel treatment trains
• two clarifiers
• Parshall flume and flow meter
• step-down post -aeration
• aerated sludge digester
• sludge drying beds
• post -chlorination
from a facility loca edJarthe.Parkton W�WTP; on NCSR 1724 southeast of Parkton in Robeson
County, and
2. discharge from said treatment works at the location specified on the attached map into Dunns Marsh,
a waterbody classified C-Swamp within the Lumber River Basin.

Outfa11001
(flows southeast)
Town of Parkton WWTP
Receiving Stream: Dunns Marsh Drainage Basin: Lumber River
Latitude: 34° 53' 02" N Longitude: 78° 59' 59" W
Permitted Flow: 0.200 MGD Sub -Basin: 03-07-53
State Grid / USGS Quad: H 23NW / Hope Mills, N.C. Stream Class: C; Sw
North
NPDES Permit NC0026921
Robeson County

Permit NC0026921
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date and lasting until expiration, the Permittee is authorized to
discharge from Outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below:
PARAMETER
,.
LIMITS }
MONITORIN
G REQUII,tEMENTS
`' Sample
Typeh
Sample
Locationl
Monthly
Average
Weekly
> Average
Daily
Maximum
Measurement,
Frequency
Flow
0.200 MGD
Continuous
Recording
I or E
BOD, 5 day (20°C) 2
(April 1 — October 31)
15.0 mg/L
22.5 mg/L
1/Week
Composite
I & E
BOD, 5 day (20°C) 2
(Nov 1— March 31)
24.0 mg/L
36.0 mg/L
1/Week
Composite
I & E
Total Suspended Solids 2
30.0 mg/L
45.0 mg/L
1/Week
Composite
I & E
NH3 as N (April 1 — October 31)
5.0 mg/L
15.0 mg/L
1/Week
Composite
E
NH3 as N (Nov 1 — March 31)
9.0 mg/L
27.0 mg/L
1/W'k
Composite
E
Dissolved Oxygen 3
,,11/Week-
Grab
E
Temperature (°C)
/ ; 1/Day
Grab
E
Fecal Coliform (geometric
mean)
200/100 ml
400/100 ml
I>
/
1/1,
\
Grab
E
Total Residual Chlorine 4
17 µg/L(4
2/Week\\_\
Grab
E
Total Nitrogen
(NO2+NO3+TKN)
\\
%ppuarter \
l
"`Composite
\
E
Total Phosphorus
S ,\
\'
.:4/Quarter
'epinposite
E
Chronic Toxicity 5
\ \N
„N \
\ 1/Quarter
Composite
E
Conductivity
---.,,
\ \,
\, \
\;' 1/Week
Grab
E
6
Total Mercury'�
� ��;,
.
� \
\12 ng/L :ON.,
\t/Month
Grab
E
pH6
6:(f and <9't andarku is -"NN2,Avfonth
Grab
E
Dissolved Oxygen
\ \
% )
\ `\
'1/Week
Grab
U & D
Temperature (°C) /..------„..., \ \
, / z--_`
\ \
1/Day
Grab
U & D
Footnotes:
\
1. E = Effluent; I = Influent; unns Mars ,\ipstreaa• from the outfall at NCSR 1725; D = downstream within
Little Marsh Swamp at U.S.i hay 301.
2. The monthly average BODS an \To al Su ended Solids concentrations shall not exceed 15% of the respective
influent values (i.e., 85% removal qt � .
3. The daily average dissolved oxygen'ffluent concentration shall not fall below 5.0 mg/L.
4. The Permittee shall monitor for TRC only if chlorine is used to disinfect. Because of difficulties quantifying TRC in
a wastewater matrix, the Division will consider all values reported below 50 ug/L to be compliant with this permit.
5. Chronic Toxicity (Ceriodaphnia) P/F at 90%: January, April, July & October [see A. (4.)].
6. Samples must be analyzed using EPA Method 1631E or as subsequently modified.
The Permittee shall discharge no floating solids or foam visible in other than trace amounts.
A. (2.) MERCURY REOPENER
The Division may re -open this permit to require mercury load limitations, mercury minimization plans, and/or
source water characterization following completion of the Phase 2 Mercury TMDLs for the Lumber and
Waccamaw River watersheds.

Permit NC0026921
A. (4.) 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 90%.
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 January, April, July & October. Effluent sampling for this testing shall be performed at
the NPDES permitted final effluent discharge below all treatment processes.
If the test procedure performed as the first test of any single quarter results in a failure or ChV below the permit
limit, then multiple -concentration testing shall be performed at a minimum, in each of the two following months as
described in "North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure" (Revised -February 1998) or
subsequent versions.
The chronic value for multiple concentration tests will be determined using the geometric mean of the highest concentration
having no detectable impairment of reproduction or survival and the lowest concentration that does have a detectable
impairment of reproduction or survival. The definition of "detectable impairment," methods, exposure regimes,
and further statistical methods are specified in the "North Carolina Phase II Chrofuc Whole Effluent Toxicity Test Procedure"
(Revised -February 1998) or subsequent versions.
All toxicity testing results required as part of this permit condition v/ill'Eie ntered on the.E uent Discharge Monitoring Form
(MR-1) for the months in which tests were performed, using the parameter code TGP3B forr a pass/fail results and THP3B
for the Chronic Value. Additionally, send DWQ Form AT-3 (originalto the following address:
NC DENR / DWQ / E vnironmental�ciences ction
1621 Mail Service Cente`�
Raleigh, North Carolina 276
Completed Aquatic Toxicity Test Forms shdll be-fi d`with the\E vionmental Sciences Section no later than 30 days after the
end of the reporting period for which the report is ma' e' Test data shaa1 ei6 mpletn,accurate, include all supporting
chemical/physical measurements and afro 'hcentration).response\data and be ce • ied by laboratory supervisor and ORC or
approved designate signa�tur�oxalResidu 1Chorine
chlorine is employed for dis e-ction of -the as} ire•
Should there. be no discharge of� flow from ili luring a month in which toxicity monitoring is required, the Permittee
will complete the informatio to ated at the"top`of the. aq\uatic toxicity (AT) test form indicating the facility name, permit
number, pipe number, county,'nd ie month/yea%of the report with the notation of "No Flow" in the comment area of the
form. The report shall be submitted to the EnvironmentaNSciences Section at the address cited above.
1
Should the Permittee fail to monitor dur ngi nth in which toxicity monitoring is required, monitoring will be required
during the following month. Should an3 test data from this monitoring requirement or tests performed by the North
Carolina Division of Water Quality indiba( 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.
the efflu\�toxicity sample must be measured and reported if
A. (5.) SLUDGE MONITORING REQUIREMENTS
The Permittee shall monitor facility -generated sludge (bio-solids) for mercury.
❖ Sludge samples shall be collected 2/Year.
❖ The laboratory detection limit for mercury in sludge samples is 0.1 mg/Kg (dry weight).
+ When sludge monitoring results are received, the Permittee shall be appended these results to
the next DMR form and submit to the Division.

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES Permit NC0026921
Renewal 2009
aclity Informatio
Applicant/Facili1
�plican
�Facilil
res
Town of Parkton
P.O. Box 55, Parkton, North Carolina 28371
NCSR 1724, West David Parnell Street
Permitter
0200 MGD
T
ego
100% Domestic
racri1
ass/Pefmrt Stag
Grade II / Renewal
noun
Robeson
iseeilaneous
Receiving <S
Dunns Marsh
Regional Offic
FRO
ream i
assification
C-Sw
opo Quad
H23NW / Hope Mills
Fish Advisory
for Hg
Joe Corporon
as
03-07-53
October 2, 2009
Dfainage;
rea (mi
5.0
Summer `7,Q 10 ,(c
0.0
Wi ter7t
10(c
0.38
Aerage, Flow (c
6.18
IWC (% o
200`lVIGD
100 (zero -flow)
The Town of Parkton supports no industry and has no pretreatment program.. The existing activated -
sludge treatment system consists of:
• manual bar screen
• two oxidation ditches (operated as parallel treatment trains)
• two clarifiers
• Parshall flume and flow meter
step-down post -aeration
• aerated sludge digester
• sludge drying beds
• post -chlorination
TOXICITY TESTING:
Current Requirement:
Recommended Adjustment:
Required for discharge under "zero -flow condition, Chronic
P/F@90%.
None.
Town of Parkton WWTP Fact Sheet
NPDES Renewal 2009
Page I

COMPLIANCE SUMMARY:
Parkton passed seven quarterly WET tests since April 2007 but failed again in April 2009. Prior to
that since 2005, Parkton's toxicity history is checkered Ode -attached WET Testing Self -Monitoring
Summary). Since 2006, Parkton's compliance issues relate mostly to flow limit exceedence (see
recommendations below).
Recommendations for Compliance. The Division is concerned about Parkton's sewer collection
system inflow and infiltration (I/I) noting 12 violations of the WWTP flow limit (0.200 MGD) since
June of 2006. The Permittee is aware of this issue and estimates their PI rate at 0.040 MGD. They
have secured some grant money to evaluate the needed repair work. They have also applied to the
Clean Water Management Trust Fund (CWMTF) for the construction phase.
In a report dated February 10, 2009, the Fayetteville Regional Office (FRO) notes that the CWMTF
has funded a plan/design study for connecting Parkton's effluent to the Town of Red Springs. FRO
applauds this effort and further notes that this sewer -connection project would also embrace the
Lumber Bridge Community where septic systems are beginning to fail. FRO further notes that the
Parkton's WWTP requires no outstanding repairs or modifications at this time.
INSTREAM MONITORING:
Current Requirement: Upstream and downstream for dissolved oxygen and
temperature under "zero -flow conditions.
Recommended Adjustment: None
PROPOSED PERMIT CHANGES:
Mercury. The Division has added a permit limit for mercury (12ng/L) based on reasonable
potential to exceed the water -quality standard based on 13 quarterly samples dating from 2006 to
2009 (see attached RPA results). Per NPDES guidance, the Division has also increased the
monitoring frequency from 1/Quarter to 1/Month.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice:
Permit Scheduled to Issue:
STATE CONTACT:
October 21, 2009
December 1, 2009
If you have any questions oncerf ng the above or the attached documents, please contact Joe
Corporon at (919 807 .394/
AME:
DATE: /2 o r t/r
Town ofParkton WWTP Fact Sheet
NPDES Renewal 2009
Paget