NC0082949_Permit Modification_20110624

ATA
NCDENR
North Carolina Department of Environment and Natural Resources
Division of Water Quality
Beverly Eaves Perdue Coleen H. Sullins Dee Freeman
Governor Director Secretary
June 24, 2011
The Honorable Scott Morris
Town of Denton
P. O. Box 306
Denton, NC 27239
Subject: Modification of NPDES Permit NC0082949
Town of Denton WTP
Davidson County
Dear Mayor Morris:
Division personnel have reviewed and approved your application for minor modification of the subject permit.
Accordingly we are forwarding the attached modified permit page. Please remove the existing `Effluent
Limitations and Monitoring Requirements" page and replace it with the one attached to this letter.
This modification extends the compliance schedule for the collection of effluent flow data through the use of a
continuous, recording method. This modification is granted based upon the fact that the plant will be undergoing
a comprehensive upgrade, including parts of the wastewater infrastructure. Delaying the requirement for
continuous flow monitoring will allow installation of a new flow measurement device to occur as part of the
overall site improvement plan. In the meantime, the facility will continue to monitor flow through a weekly,
instantaneous sampling method.
This modification is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated
October 15, 2007 (or as subsequently amended).
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 Bob Sledge at telephone
number [phone] or via e-mail at [e-mail].
y,
oleen H. Sullins
cc: Central Files
Winston-Salem Regional Office/Surface Water Protection Section
NPDES Permit File
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 1 Affirmative Action Employer
One
NorthCarolina
Naturally

Permit NC0082949
A. (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of this permit 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:
.EFFLUENT
CHARACTERISTIC
:.LIMITS :
.._ _
=:MONITORING REQUIREMENTS
.
Monthly
Average
Daily
Maximum i
Measurement
Frizronry.
Sample Type `
Sample Location
1
Flow
Weekly1
Instantaneous
Effluent
Flow
Continuous1
Recorder
Effluent
Total Suspended Solids
30.0 mg/L
45.0 mg/L
21Month
Grab
Effluent
Total Residual Chlorine2
17 pg/L
2/Month
Grab
Effluent
pH3
2/Month
Grab
Effluent
Turbidity
2/Month
Grab
Effluent
Aluminum
Quarterly's
Grab
Effluent
Manganese
Quarterly's
Grab
Effluent
Fluoride
Quarterly's
Grab
Effluent
Total Zinc
Quarterly's
Grab
Effluent
Total Copper
Quarterly's
Grab
Effluent
Total Iron
Quarterly'
Grab
Effluent
Total Nitrogen
Quarterly's
Grab
Effluent
Total Phosphorous
Quarterly's .
Grab
Effluent
Whole Effluent Toxicity5
• Quarterly
Grab
Effluent
Footnotes:
1. The requirement for continuous flow monitoring will become effective on January 1, 2013.
Until that date, flow monitoring shall be conducted on a weekly basis, using instantaneous
sampling methods.
2. The Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance
with the permit. However, the Permittee shall continue to record and submit all values reported by
a North Carolina certified laboratory (including field certified), even if these values fall below 50
µgfL
3. The pH shall not be less than 6.0 standard units, nor greater than 9.0 standard units.
4. Monitorifig should be performed in conjunction with toxicity testing.
5. See Condition A. (2.) for toxicity testing requirements. Toxicity sampling should coincide with
sampling for parameters covered by footnote 4.
All samples collected should be of a representative discharge.
There shall be no floating solids or foam in other than trace amounts.
4

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Dear Sirs and or madams,
We at the Town of Denton spectfully request an extension on one item on our permit
issued November 2, 2009, permit number NC0082949. We are asking for a minor
modification.
We are requesting a longer time frame for the installation of flow monitoring equipment
for our lagoons discharge. Specifically we are requesting that we be allowed to collect
grab 11owS, weekly as we were doing prior to the March 2011 deadline, given by your
office. This is due to the extended submittal of the plans and the funding time frames.
Plans were submitted to your office on May 26th, 2011 by Brad Bucy with Hobbs and
Upchurch, for your review. (This has the time frames on it) Part of the request is
extending the deadline to Dec. 31, 2012. This should allow for everything that needs to
he done. We will contact your office when it completed.
It would be a hardship for the Town of Denton, if something were to be put in at this
point, as funding for this is included in the upgrade. If something were to be put in now,
it would still have to be approved by your office, and it would have to be taken out during
the upgrade. We at The Town of Denton want this project to be done so that we are
incompliance with our permit, and done so that it will serve as an effective means of flow
determination for years to come, and not be piece milled with possible problems in the
future. We have a limited staff at the Water Treatment plant and safety issues could result
in collecting daily flow samples as we have killed snakes at the outfall site. Two people
need to collect samples due to this. Some days there is only one operator here at the plant.
Our schedule now is set so that we can have two operators on duty the day that we
collect.
We ask for any and all consideration and discretion that DWQ would allow on this
project. We have been diligent in making sure, through sheer dedication of operators and
myself, that we comply with all directives given by your office. Please consider our
request.
Respectfully,
Tammie Melton
6-13-11
lM
JUN 1 4 2011
DENR-WWATER QUALITY
POINT SOURCE BRANCH
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