NC0025461_Permit (Modification)_20031113

NPDES DOCUMENT SCANNING COVER SHEET
NC0025461
Bakersville WWTP
NPDES Permit:
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification\
Complete File - Historical
Correspondence
Speculative Limits
Instream Assessment (67b)
Environmental Assessment (EA)
Permit
History
Document Date:
November 13, 2003
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content on the rQsrerae elide

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NCDENR
Mayor Charles E. Vines
Town of Bakersville
Post Office Box 53
Bakersville, North Carolina 28705
Dear Mayor Vines:
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
November 13, 2003
Subject: Modification of NPDES Permit NC0025461
Bakersville WWTP
Mitchell County
The Division renewed the subject permit on July 25, 2002. Based on the installation of UV disinfection at your
facility [completed August 2003], the NC DENR Asheville Regional Office has recommended removal of the limit
and monitoring for total residual chlorine. Accordingly, this modification includes the following change:
• The Supplement to Permit Cover Page has been updated to show that UV disinfection has been installed.
• The limit and monitoring requirements for Total Residual Chlorine now apply only if chlorine is added to
the treatment system.
Please find enclosed the revised pages, which should be inserted into your permit. The old pages may then be
discarded. All other terms and conditions contained in the original permit remain unchanged and in full
effect. This permit modification is issued under 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) clays
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 (6714 Mail Service Center, Raleigh, North
Carolina 27699-6714). Unless such demand is made, this decision shall be final and binding.
If you have any questions concerning this permit modification, please contact Charles Weaver of the NPDES
Unit at [phone], extension 511.
41j.lan W. Klimek, P.E.
cc: Central Files
Asheville Regional Office / Mike Parker
NPDES Unit
1617 Mail Service Center, Raleigh, North Carolina 27699-1617
Telephone [phone] FAX [phone]
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Permit NC0025461
SUPPLEMENT TO PERMIT COVER SHEET
The Town of Bakersville is hereby authorized to:
1. Continue to operate an existing 0.075 MGD wastewater treatment
facility located at the intersection of NC Highway 226 and NCSR 1278
west of Bakersville in Mitchell County, discharging through outfall
001 and consisting of the following wastewater treatment components:
• Influent pump station
• Bar screen
• Flow splitter
• Flow equalization basin
• Three 0.025 MGD extended aeration package plants, each with clarifier and
sludge return, two with sludge holding tanks
• Ultraviolet disinfection
• Post aeration
• Flow measuring
2. After receiving an Authorization to Construct from the Division of
Water Quality, construct and operate wastewater treatment facilities
with an ultimate capacity of 0.20 MGD. These subsequent facilities
shall be permitted to discharge 0.156 MGD initially. Following
additional approval from the Division, the facility may discharge up to
0.20 MGD.
3. Discharge from said treatment works into Cane Creek, a Class C-
Trout water in the French Broad River Basin, at the location specified
on the attached map.

Permit NC0025461
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.075 MGD)
Beginning on the effective date of this permit and lasting until expiration or expansion above 0.075
MGD, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such discharges
shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS"
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location
Flow
0.075 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C 1
30.0 mg/L
45.0 mg/L
Weekly
Composite
Influent & Effluent
Total Suspended Solids'
30.0 mg/L
45.0 mg/L
Weekly
Composite
Influent & Effluent
NH3 as N
2/Month
Composite
Effluent
Fecal Coliform
(geometric mean)
200/100 ml
400/100 ml
Weekly
Grab
Effluent
pH2
2/Month
Grab
Effluent
Temperature
Weekly
Grab
Effluent
Total Nitrogen
(NO2+NO3+TKN)
Semi-annually
Composite
Effluent
Total Phosphorus
Semi-annually
Composite
Effluent
Total Residual Chlorine3
28 pg/L
2/Week
Grab
Effluent
Notes:
1. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent
value (85% removal).
2. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
3. Limit and monitoring requirements apply only if chlorine is added to the treatment system.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC002546 1
A. (2.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.156 MGD)
Beginning upon expansion beyond 0.075 MGD and lasting until expiration, the Permittee is
authorized to discharge treated wastewater from Outfall 001. Such discharges shall be limited and
monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly -
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample Location
Flow
0.156 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C I
30.0 mg/L
45.0 mg/L
Weekly
Composite
Influent & Effluent
Total Suspended Solids'
30.0 mg/L
45.0 mg/L
Weekly
Composite
Influent & Effluent
NH3 as N
2/Month
Composite
Effluent
Fecal Coliform
(geometric mean)
200/100 ml
400/100 mi
Weekly
Grab
Effluent
pH2
2/Month
Grab
Effluent
Temperature
Weekly
Grab
Effluent
Total Nitrogen
(NO2+NO3+TKN)
Semi-annually
Composite
Effluent
Total Phosphorus
Semi-annually
Composite
Effluent
Total Residual Chlorine3
28 pg/L
2/Week
Grab
Effluent
Notes:
1. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent
value (85% removal).
2. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
3. Limit and monitoring requirements apply only if chlorine is added to the treatment system.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0025461
A. (3.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS (0.2 MGD)
Beginning upon Authorization to Operate and discharge over 0.156 MGD (see A. (4.)) and lasting until
expiration, the Permittee is authorized to discharge treated wastewater from Outfall 001. Such
discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
EFFLUENT LIMITATIONS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement-
Frequency
Sample
Type
Sample Location
Flow
0.2 MGD
Continuous
Recording
Influent or Effluent
BOD, 5-day, 20°C'
30.0 mg/L
45.0 mg/L
Weekly
Composite
Influent & Effluent
Total Suspended Solids'
30.0 mg/L
45.0 mg/L
Weekly
Composite
Influent & Effluent
NH3 as N
2/Month
Composite
Effluent
Fecal Coliform
(geometric mean)
200/100 ml
400/100 ml
Weekly
Grab
Effluent
pH2
2/Month
Grab
Effluent
Temperature
Weekly
Grab
Effluent
Total Nitrogen
(NO2+NO3+TKN)
Semi-annually
Composite
Effluent
Total Phosphorus
Semi-annually
Composite
Effluent
Total Residual Chlorine3
28 pg/L
2/Week
Grab
Effluent
Notes:
1. The monthly average effluent BOD5 and TSS concentrations shall not exceed 15% of the respective influent
value (85% removal).
2. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units.
3. Limit and monitoring requirements apply only if chlorine is added to the treatment system.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
A. (4.) FLOW EXPANSION REQUEST
Prior to the average annual flow exceeding 0.156 MGD, the facility shall submit to the
Division a flow justification to obtain an Authorization to Operate the treatment facilities at
the increased flow of 0.20 MGD.
The wastewater flows should be determined and justified based on accurate wastewater flow
records, agency guidance on flow estimates (15A NCAC 2H .0219), good engineering
practices and realistic projections of future projected flow additions. The justification must
be submitted to the following address:
NC DENR / DWQ / NPDES Unit
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
A copy of the flow justification shall be sent to:
NC DENR / Asheville Regional Office
59 Woodfin Place
Asheville, North Carolina 28801

State of North Carolina
Department of Environment
and Natural Resources
Michael F. Easley, Governor
Alan W. Klimek, P.E., Director
Coleen H. Sullins, Deputy Director
Division of Water Quality
Asheville Regional Office
WATER QUALITY SECTION
Novermber 5, 2003
Memo To: Charles Weaver
NPDES Permit Unit
From: Mike Parker
Asheville Regional Office
Subject: Town of Bakersville
Permit Modification Request
NC0025461
Total Residual Chlorine
X; a
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
�:� r- — - ----�
NOV 7 2003
As I discussed with you on November 4, 2003, when reviewing the BIMS DMR violations I found that the
Town of Bakersville was in violation of the monitoring frequency requirements for Total Residual Chlorine
for the month of August 2003 (copy attached). After reviewing their NPDES Permit (issued July 25,
2002) it was found that the permit (copy attached) contained a limit and monitoring requirements for
Total Residual Chlorine. On August 2, 2002, an Authorization to Construct (copy attached) was issued to
the Town of Bakersville for construction of a UV Disinfection Unit.
On August 6, 2003 the new UV unit was placed in operation at the Bakersville WWTP. They are no longer
monitoring for Total Residual Chlorine.
It is requested that NPDES Permit No. NC0025461 issued to the Town of Bakersville be modified to
remove the monitoring requirements for Total Residual Chlorine unless chlorine is used for disinfection.
If you have questions, please call me at 828-251-6208.
Asheville Regional Office, 59 Woodfin Place, Asheville, North Carolina 28801 Phone: [phone] Fax: [phone]
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