NC0023868_Permit modification_19970917

State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
September 17,1997
Mr. Stephen R. Shoaf
City of Burlington
P.O. Box 1358
Burlington, North Carolina 27216
ATA
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Subject: NPDES Permit Modifications
NPDES Permit No. NC0023868;
East Burlington WWTP
NPDES Permit No. NC0023876
South Burlington WWTP
Alamance County
Dear Mr. Shoaf:
Personnel from the City of Graham contacted the NPDES Unit to notify us that orthophosphate sampling
was no longer being conducted at their facility pursuant to a Memorandum of Understanding (MOU) with the
City of Burlington. The MOU for Instream sampling was finalized with the help of Division personnel in
March, 1996. These permit modifications are being issued to formally confirm the deletion of orthophosphate
sampling requirements from the subject permits.
Please find enclosed the amended Effluent Limitations pages and Instream Monitoring Requirements (Part
III, Condition G.) for each facility. These pages should be inserted into the respective permits. The old pages
should be discarded. All other terms and conditions contained in the original permits 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 these permit modifications 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 a written petition conforming to Chapter 150B of the
North Carolina General Statutes, 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.
Sin erely,
Preston Howard, Jr., P.E.
cc. Central Files
Winston-Salem Regional Office, Water Quality Section
NPDES Unit
Aquatic 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.(1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - SUMMER (April 1 - October 31) Permit No. NC0023868
Duringthe period beginning on the effective date of the 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:
Flow
BOD, 5 day, 20°C2
Total Suspended Residue2
NH3 as N
Dissolved Oxygen3
Monthly
:Avers"ge
12.0 MGD
12.0 mg/I
30.0 mg/1
4.0 mg/I
18.0 mg/I
45.0 mg/I
'MONITORING . RE°Q`UIREMENTS` "'
asurement
requency;
Continuous
Daily
Daily
Daily
Sample;:
Sam;pl`e.'
Locati;on1
Recording
Composite
Composite
Composite
IorE
I, E
I, E
E
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2+NO3+TKN)
Total Phosphorus4
Chronic Toxicity5
Conductivity6
Cadmium
Lead
Cyanide
Copper
Zinc
Fluoride
Silver
Chlorides
200 /100 ml
2.0 mg/I
400/100m1
Daily
Daily
Daily
Daily
Monthly
Weekly
Quarterly
6
Weekly
Weekly
Weekly
Monthly
Monthly
Monthly
Monthly
Monthly
Grab
Grab
Grab
Grab
Composite
Composite
Composite
Composite
Composite
Composite
Grab
Composite
Composite
Composite
Composite
Composite
E, U, D
E, U, D
E
E, U, D
E
E, U, D
E
E, U, D
E
Footnotes:
1 Sample locations: E - Effluent; I - Influent; U - Upstream; D - Downstream. For instream monitoring requirements, see Part III, Condition G.
All stream samples shall be grab samples
2 The monthly average BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85% removal).
3 The daily dissolved oxygen effluent concentration shall not be less than 5.0 mg/1.
4 Compliance shall be based upon a quarterly average of weekly samples.
5 Chronic Toxicity (Cerodaphnia) P/F at 36% - February, May, August & November (see Part III, Condition H.).
6 Conductivity samples shall be collected three times per week during June, July, August & September and once per week during April, May & October.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

c ..
A. (2) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - WINTER (November 1 - March 31) Permit No. NC0023868
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall number
001. Such discharges shall be limited and monitored by the Permittee as specified below:
Flow
BOD, 5 day, 20°C2
Total Suspended Residue2
NH3 as N
Dissolved Oxygen3
lonthI.y
ve-rag.e
12.0 MGD
24.0 mg/I
30.0 mg/I
8.0 mg/I
36.0 mg/I
45.0 mg/I
':Measurement
Frequency
Continuous
Daily
Daily
Daily
ample
pe
Sample
Locationl
Recording
Composite
Composite
Composite
IorE
I, E
I, E
E
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2+NO3+TKN)
Total Phosphorus4
Chronic Toxicity5
Conductivity
Cadmium
Lead
Cyanide
Copper
Zinc
Fluoride
Silver
Chlorides
200 /100 ml
2.0 mg/I
400 / 100 ml
5.6 µg/I
70.0 µg/I
14.0 µg/1
12.6 µg/I
95.0 µg/I
56.0 µg/I
Daily
Daily
Daily
Daily
Monthly
Weekly
Quarterly
Weekly
Weekly
Weekly
Weekly
Monthly
Monthly
Monthly
Monthly
Monthly
Grab
Grab
Grab
Grab
Composite
Composite
Composite
Grab
Composite
Composite
Grab
Composite
Composite
Composite
Composite
Composite
E, U, D
E, U, D
E
E, U, D
E
E, U, D
E
E, U, D
E
Footnotes:
1 Sample locations: E - Effluent; I - Influent; U - Upstream; D - Downstream. For instream monitoring requirements, see Part III, Condition G.
All stream samples shall be grab samples
2 The monthly average BOD5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85% removal).
3 The daily dissolved oxygen effluent concentration shall not be less than 5.0 mg/1.
4 Compliance shall be based upon a quarterly average of weekly samples.
5 Chronic Toxicity (Cerodaphnia) P/F at 36% - February, May, August & November (see Part III, Condition H.).
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored weekly at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
•

Part III
Permit No. NC0023868 •
G. INSTREAM MONITORING REQUIREMENTS
PARAMETERS TO BE SAMPLED
Parameter
Sample Type
Frequency
Dissolved Oxygen
Grab
3/week (June -September)
1 /week (October -May)
Fecal Coliform
Grab
3/week (June- September)
1 /week (October -May)
Temperature
Grab
3/week (June -September)
1/week (October -May)
Conductivity
Grab
3/week (June -September).
1/week (October -May)
Total Phosphorus
Grab
3/week (June -September)
1/week (October -May)
SAMPLE LOCATIONS
1. Upstream at Hopedale Road (NCSR 1712)
2. Downstream at NC Highway 54 and at NCSR 2158 (above the dam).
All instream samples shall be grab samples.
REPORTING REQUIREMENTS
Data entered on a form approved by the Division and summarized in an annual report
due by January 1st of the year immediately following the summer period when sampling
occurred.
Yearly monitoring reports shall be sent to:
NC DEHNR / DWQ
Modelling / TMDL Unit
P.O. Box 29535
Raleigh, NC 27626-0535
modified 9-97