NC0026921_NPDES Permit Renewal_20131223

ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Resources
Water Quality Regional Operations Section
Pat McCrory Thomas A. Reeder John E. Skvarla, III
Governor Director Secretary
December 23, 2013
MEMORANDUM
To: Joe Corporon
Expedited Permit. Section
Through: Belinda Henson, Water Quality Programs Regional Supervisor
Fayetteville Regional Office
From: Mark Brantley, Environmental Senior Specialist
Fayetteville Regional Office
SUBJECT: Minor NPDES Permit Renewal
Town of Parkton
Parkton WWTP
NPDES Permit No. NC 0026921
Robeson County
Please find below, regional comments for the subject minor peunit renewal.
Idiaz_0194410.0
Applicant is not requesting modification of the facility or increasing flow at this time. However facility has
applied for an ATC to conduct some improvements at the WWTP. The proposed project includes construction
of a new headworks system with spiral screen and grit removal, precast concrete flow splitter box, precast
concrete chlorine contact basin, dechlorination chemical feed building, associated yard piping, electrical, and
associated appurtenances. No flow increase was requested. The Fayetteville Regional Office is concerned
about the actual flow to the WWTP. Currently the permitted flow is 0.2 MGD (80% of the permitted flow is
0.16 MGD, and 90% of the permitted flow is 0.19 MGD.) The town has stated in their permit renewal
application that they estimate the inflow and infiltration rate at 40,000 gallons per day. Also included in the
ATC request are plans to replace approximately 181 sewer services and rehabilitation of existing pump 'station
no. 2. The average flow for 2013 has been 0.149 mgd (this includes the chronic rainfall events during the
spring and summer of 2013), 0.072 mgd in 2012, and 0.087 mgd in 2011.
Fayetteville Regional Office
Location: 225 Green Street, Suite 414, Fayetteville, NC, 28301-5095
Phone: [phone] \ Fax: [phone] \ Customer Service: 1-877-623-6748
Internet: http://portal.ncdenr.org/webhvo
internet: www.ncwaterquality.org
An Equal Opportunity/Affirmative Action Employer — 50% Recycled/10% Post Consumer Paper
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Flow violations:
5 months during the calendar year 2006
2 months during the calendar year 2007
4 months during the calendar year 2008
2 months during the calendar year 2009
2 months during the calendar year 2010
2 months during the calendar year 2013
A rating sheet is not attached as no modifications wet-6 made to this facility during the previous permit cycle.
Currently WWTP is experiencing some elevated ammonia levels and they have failedchronic toxicity testing in
the months of October 2013 and November 2013. They are working with some consultants to correct the -
problem. One suspected problem is that the WWTP is under loaded. The influent wastewater stream is very
weak which could be caused by the addition of 40,000 gallons per day of I/I as stated in facility's renewal
application.
Facility has requested the following modifications to their sampling requirements:
1. Requested that the Mercury monitoring/limit requirements be removed.
2. Requested that the quarterly toxicity testing requirements be removed.
3. Requested that the upstream and downstream monitoring requirements for Dissolved Oxygen and
Temperature be removed.
4. Requested that the conductivity monitoring be removed from the permit.
Please see the town's cover letter with their application for more information about their request.
The Fayetteville Regional Office asked that the sampling requirements be required according to theDivisionof
Water Resources strategy.
Based on the above information, the Fayetteville Regional Office recommends reissuance in keeping with the
current basin wide strategy.
Cc: Central Files