NC0060461_Permit Modification_19970829

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
Mr. Carl Daniel
Carolina Water Service
PO Box 240705
Charlotte, North Carolina 28224
Dear Mr. Daniel:
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August 29, 1997
Subject: Modification to NPDES
Permit No.,NC0060461
Abington Subdivision WWTP
Forsyth County
On December 23, 1996, the Division of- Water Quality issued NPDES Permit No.
NCO060461 to Carolina Water Service, Inc. of N.C. Based on a review of this permit file by the
Winston-Salem Regional Office, the Division is hereby forwarding the following modification to
the subject permit. This permit modification is issued to delete effluent sampling for
conductivity. Please insert the enclosed effluent pages and discard the old effluent pages. This
permit modification becomes effective immediately.
All other terms and conditions in the original permit remain unchanged and in full
effect. These modifications are 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 December 6, 1983.
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 11666,
Raleigh, North Carolina 27604. Unless such demand is made, this decision shall be final and
binding.
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]

Mr. Carl Daniel
Page Two
August 29, 1997
If you have any questions concerning this permit, please contact Mr. Mack Wiggins at
telephone number 919/733-5083, extension 542.
Sincerely,
cc: Central Files t4- Preston Howard, Jr., P.E.
Winston-Salem Regional Office/Water Quality
Rabsw** . -�GlWlressj EP.0
Facility Assessment Unit

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NCO060461
During the period beginning on the effective date of the permit and lasting until expansion above 0.200 MGD the Permittee is authorized to
discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characterlstics
Flow
BOD, 5 day, 200C
Total Suspended Residue
NH3 as N***
Dissolved Oxygen"
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature, OC
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Conductivity
Discharge Limitations
Monthly AM
0.200 VIGID
30.0 mg/l
30.0 mg/l
2.0 mg1l
200.0/100 ml
Weekly Avcj,
Monitoring
Requirements
Measurement
Sample
*Samnle
Daily Max
Freg6ency
Type
Location
Continuous
Recording
I or E
45.0 mg/l
Weekly
Composite
E
45.0 mg/l
Weekly
Composite
E
Weekly
Composite
E
Weekly
Grab
E, U, D.
400.0 /100 ml
Weekly
Grab
E,U,D
28.0 gg/l
2/Week
Grab
E
Weekly
Grab
U,D
Quarterly
Composite
E
Quarterly
Composite
E
Weekly
Grab
U,D
Sample locations: E - Effluent, I - 1nfluent, U - Upstream above outfall, D - Downstream at NCSR 2014
The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
***From November 1 through March 3 1, the limit for NH3-N shall be 4.0 mg/l.
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.

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL
Permit No. NCO060461
During the -period beginning on the effective date of the permit and lasting until expansion above 0.200 MGD the Permittee is authorized to
discharge from outfall(s) serial number 001. (Continued)
Effluent . Characteristics Discharge Limitations Monitoring Requirements
Units (specify) Measurement— Sample *Samole
Temperature Monthly Ava. Weekly Avg. Daily Max Freguency !ype Location
Daily Grab E

A. (). EFFLUENT LIMITATIONS AND MONHORING-REQUIREMENTS FINAL Permit No. NCO060461
D uring the period beginning after expansion above 0.200 MGD and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 200C
Total Suspended Residue
NH3 as N***
Dissolved Oxygen"
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature, OC
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Conductivity
Discharcie Limitations
Monitoring
Requirements
Measurement
samole
*Sample
Monthly Avg, Weekly Ay g.,
Daily Max
Froquency
Type
Location
0.385 MGD
Continuous
Recording
I or E
30.0 mg/l
45.0 mg/l
Weekly
Composite
E
30.0 mg/l
45.0 mg/l
Weekly
Composite
E
2.0 mg1l
Weekly
Composite
E
Weekly
Grab
E, U, D
200.0 /100 ml
4�00. 0 /100 ml
Weekly
Grab
E,U,D
25.0 lag/l
2/Week
Grab
E , I
Weekly
Grab
U,D
Quarterly
Composite
E
Quarterly
Composite
E
Weekly
Grab
U,D
Sample locations: E - Effluent, I - Influent, U - Upstream above outfall, D - Downstream at NCSR 2014
The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
***From November 1 through March 31, the limit for NH3-N shall be 4.0 mg/l.
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.

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL
Permit No. NCO060461
During the period beginning after expansion above 0.200 MGD and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. (Continued)
Effluent Characteristics Discharge Limitations Monitoring Requirements
Units (specify) Measurement Sample *Saml2le
Monthly Avg. Weekly Avg. Daily Max Frequency ispe Location
Temperature
Daily Grab E