NC0087840_Permit Modification_20050413

Michael F. Easley, Governor
William G. Ross Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E. Director
Division of Water Quality
April 13, 2005
Ms. Peggy Bissette, Town Administrator
Town of Middlesex
P.O. Box 69
Middlesex, North Carolina 27557
Subject: Minor NPDES Permit Modification
Permit NCO087840
Middlesex WTP
Nash County
Dear Ms. Bissette:
Division personnel have reviewed and approved your request for modification of the above referenced
permit. Based on the proximity of the discharge to the receiving stream, the batch nature of the discharge,
and the minimal volume of discharge, the instream monitoring requirement has been deleted. Furthermore,
installation of an additional holding tank may not be necessary. Any construction deemed necessary by the
Town to meet effluent limitations contained herein must be approved by the Division of Water Quality's
Construction Grants & Loans program. This permit 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 May 9, 1994 (or as subsequently amended).
Please take notice that this permit is not transferable. 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, Coastal Area Management Act, or any other Federal or Local
governmental permits which may be required.
If you have any questions or need additional information, please do not hesitate to contact Mark
McIntire of my staff at [phone], extension 508.
Sincerely,
zan Klimek, P.E.
cc: Central Files
NPDES Unit Files +
Raleigh Regional Office
NQc"�hCarolina
YVA07llJ
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617 Phone [phone] Customer Service
Internet: h2o.enr.state.ne.us 512 N. Salisbury St. Raleigh, NC 27604 FAX [phone]
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Permit NCO087840
Part I - Section A
1. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
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:
PARAMETER
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Avera a
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Location
Flow (MGD)
0.0034
Instantaneous
Estimate
Effluent
Total Suspended Solids
30.0 mg/L
45.0 mg/L
2/Month
Grab
Effluent
Iron
Monthly
Grab
Effluent
Manganese
Monthly
Grab
Effluent
Fluoride
Monthly
Grab
Effluent
pH
Between 6.0 and 9.0 Standard Units
Monthly
Grab
Effluent
Total Residual Chlorine
28 µg/L
2/Month
Grab
Effluent
Zinc'
Monthly
j Grab
j Effluent
Notes:
1 Zinc shall be monitored if the permittee uses any zinc -based additive in the water treatment process.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.