NC0083071_technical Correction_20081117

WATF9
7
T
The Honorable Bobby Cagle, Jr.
Town of Robbinsville
P.O. Box 126
Robbinsville, North Carolina 28711
Dear Mayor Cagle:
Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Coleen H. Sullins, Director
Division of Water Quality
November 17, 2008
Subject: Permit Correction to Robbinsville WTP
NPDES Permit NCO083071
Robbinsville WTP
Graham County
Division personnel have reviewed and corrected an error on your existing NPDES Permit A. (1), Effluent
Limitations and Monitoring Requirements page. The June 1, 2008, Total Residual Chlorine (TRC) limit date
has been changed to June 1, 2009.
We are forwarding you the new A. (1), "Effluent Limitations and Monitoring requirements" page with the
corrected TRC limit date of June 1, 2009. You should replace your existing A. (1) effluent page in your current
permit with this new page. This permit correction 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).
If any parts, measurement frequencies or sampling requirements contained in this permit correction 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 150E
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.
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
Guerra at telephone number [phone].
i4
H. Sullins
NPDES Permit NC0083071, Effluent page a (1)
cc: Central Files
Asheville Regional Office / Surface Water Protection
NPDES Unit
No"wra!!ya rk
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: www.newaterouality.org Location: 512 N. Salisbury St. Raleigh, NC 27604 Pax [phone] 1-877-623-6748
An Equal Opportunity/Affirmative Action Employer —50% Recycled/100/. Post Consumer Paper

I
Permit NCO083071
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 filter backwash from outfall 001. Such discharges shall be limited
and monitored by the Permittee as specified below:
Effluent
Limits°
Monitoring Requirements
r _
°: Monthly;,
z` Daily
Measurement
Sample `Type'
Sample Locatioa
:Averse `
- MaRiiaum
Fre uenc
Flow
Monitor & Report
Weekly
Estimate
Effluent
Total Suspended Solids
30.0 m L
45.0 m L
2/Month
Grab
Effluent
Settleable Solids
0.1 m L
0.2 m L
Weekly
Grab
Effluent
Turbidity'
Monitor & Report
Weekly
Grab
Upstream &
Downstream
Iron
Monitor & Report
Weekly
Grab
Effluent
Total Residual Chlorine2
1 17.0 u L
Weekly
Grab
Effluent
Aluminum
Monitor & Report
Weekly
Grab
Effluent
Footnotes:
1. The discharge shall not cause the turbidity of the receiving water to exceed 10 NTU. If the
turbidity exceeds these levels due to natural background conditions, the discharge level cannot
cause any increase in the turbidity in the receiving water.
2. A total residual chlorine (TRC) limit has been added to this permit. The limit will take effect
June 1, 2009. Until the limit takes effect, the permittee shall monitor TRC with no effluent
limit.
3. The Division shall consider all effluent TRC values reported below 50 ug/1 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 ug/ 1.
'All samples collected should be from a representative discharge event.
There shall be no discharge of floating solids or visible foam in other than trace
amounts.