NC0020567_Permit (Modification)_19970627

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
Mr. Joseph Huffman
Town of Elkin
P.O. Box 857
Elkin, North Carolina 28621
Dear Mr. Huffman:
IL ". WA
A&74 40
IDEHNR
June 27,1997
Subject: NPDES Permit Correction
NPDES Permit No. NCO020567
Elkin WWTP
Surry County
On February 2, 1995, the Division issued NPDES Permit No. NCO020567 to the subject facility. A
review of the permit file by Mr. Mark McIntire of the NPDES Group has indicated that an error was
inadvertently made in the permit. Accordingly, we are forwarding this correction to the subject permit
to correct the error. These permit modifications correct the effluent limitations for BOD, Fecal
Coliform and Total Suspended Residue.
Please find enclosed an amended effluent limitations page for discharges at 1.8 MGD which should
be inserted into your permit. The old page should be discarded. All other terms and conditions contained
in the original permit remain unchanged and in full effect. These permit modifications are issued
pursuant to the requirements of North Carolina General Statutes 143-215.1 and the Memorandum of
Agreement between North Carolina and the U. S. Environmental Protection Agency.
If any parts, measurement frequencies or sampling requirements contained in this permit
modification 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 150B of the North Carolina General Statutes, and filed with
the Office of Administrative Hearings, Post Office Drawer 27447, Raleigh, North Carolina 27611-
7447. Unless such demand is made, this decision shall be final and binding.
If you have any questions concerning these permit modifications,. please contact Charles Weaver at
telephone number [phone], extension 511.
Sincerers,.
Preston Howard,'Jr., P.E.
cc. Central Files
Winston-Salem Regional Office
Mr. Roosevelt Childress, EPA
Permits and Engineering Unit
Aquatic Survey & Toxicology Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL Permit No. NCO020567
During the period beginning upon expansion to 1.8 MGD 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 CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Avers a
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type '
Sample
Location'
Flow
1.8 MGD
Continuous
Recording
I or E
BOD, 5-Day, 20°C2
30.0 mg/1
45.0 mg/I
Daily
Composite
E
Total Suspended Residue2
30.0 mg/l
45.0 mg/I
Daily
Composite
E
NH3 as N
3/Week
Composite
E
Fecal Coliform(geometric mean
200 / 100 ml
400 / 100 ml
Daily
Grab
E
Total Residual Chlorine
28.0 /1
Daily
Grab
E
Tem erature
Daily
Grab
E
Total Nitrogen (NO2 + NO3 + TKN)
Monthly
Composite
E
Total Phosphorus
Monthly
Composite
E
Acute Toxicit 3
Quarterly
Composite
E
Footnotes:
1 Sample locations: E - Effluent; I - Influent.
2 The monthly average effluent BOD 5 and Total Suspended Residue concentrations shall not exceed 35% of the respective influent value (65% removal).
3 Acute Toxicity (Daphnid 48-hour) LC50 87%; March, June, September & December (see Part III, Condition F).
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored at the effluent via
daily grab samples.
There shall be no discharge of floating solids or visible foam in other than trace amounts.