NC0057151_Permit Issuance_19961025

State of N`orih 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
October 25, 1996
Mr. Robert M. Sams
Town of Mars Hill
P.O. Box 368
Mars Hill, North Carolina 28754
- Ank
[DEHNR
Subject: NPDES Permit Issuance
Permit No. NCO057151
Mars Hill WWTP
Madison County
Dear Mr. Sams:
In accordance with the application for a discharge permit received on April 23, 1996, the Division is
forwarding herewith the subject NPDES permit. This permit is issued pursuant to the requirements of North
Carolina General Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the US
Environmental Protection Agency dated December 6, 1983.
If any parts, measurement frequencies or sampling requirements contained in this permit 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.
Please take notice this permit is not transferable. Part II, EA. addresses the requirements to be followed
in case of change in ownership or control of this discharge.
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 permit that may be required.
If you have any questions concerning this permit, please contact Steve Pellei at telephone number (919)
733-5083, extension 516.
Sincerely,
original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E.
cc: Central Files
Asheville Regional Office
Mr. Roosevelt Childress, EPA
Permits and Engineering Unit
Facility Assessment 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

Permit No. NCO057151
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards and
regulations promulgated and adopted by the North Carolina Environmental Management Commission, and the
Federal Water Pollution Control Act, as amended,
Town of Mars Hill
is hereby authorized to discharge wastewater from a facility located at the
Mars Hill Wastewater Treatment Plant
on Highway 213 West
Mars Hill
Madison County
to receiving waters designated as Gabriel Creek in the French Broad River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III,
and IV hereof.
The permit shall become effective December 1,1996.
This permit and the authorization to discharge shall expire at midnight on October 31, 2001.
Signed this day October 25,1996.
Original Signed By
David & Goodrich
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Mangement Commission

Permit No. NC0057151
SUPPLEMENT TO PERMIT COVER SHEET
Town of Mars Hill
is hereby authorized to:
1. Continue to operate an existing 0.425 MGD wastewater treatment facility consisting of a
communitor, bar screen, grit removal chamber, flow meter with totalizer, three aeration tanks,
clarifier, aerobic digestor with sludge return, chlorine contact tank, sludge drying beds and
standby power supply located at Mars Hill Wastewater Treatment Facility, on Highway 213
West, Mars Hill, Madison County (See Part III of this Permit), and
2. Discharge from said treatment works at the location specified on the attached map into Gabriel
Creek which is classified Class C waters in the French Broad River Basin.

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ATER
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ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT•DU` Y ROAD, HARD OR
HARD SURFACE IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE UNIMPROVED ROAD — —
Latitude 35049'38" Longitude 82033'28'
Map # D8SE Sub -basin 040304
Stream Class C
Discharge Class 01 11 03
Receiving Stream Gabriel Creek
Design 0 n 4a m ;n Permit expires 10/31/01
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CONTOUR INTERVAL 40 FEET
QUAD LOCATION Town of Mars Hill
■ NCO057151
Madison County
WWTP
e

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31) Permit No. NCO0571.51
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfail(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 20°C'"
Total Suspended Residue"
NH3 as N
Dissolved Oxygen —
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Conductivity
Discharge Limitations
Mont _ly Avg, Weekly Avg.
0.425 MGD
30.0 mg/I 45.0 mg/I
30.0 mg/I 45.0 mg/I
2.0 mg/I
200.0 /100 ml 400.0 /100 ml
Monitoring
Requirements
Measurement
Sample
*Sample
Daily Max Frequency
Ty iee
Location
Continuous
Recording
I or E
Weekly
Composite
E, I
Weekly
Composite
E, I
Weekly
Composite
E
Weekly
Grab
E, U, D
Weekly
Grab
E,U,D
2/Week
Grab
E
Weekly
Grab
E, U, D
Semi-annually
Composite
E
Semi-annually
Composite
E
Weekly
Grab
U, D
* Sample locations: E - Effluent, I - Influent, U - Upstream 50 feet, D - Downstream 2 miles at NCSR 1559
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 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. O. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NCO0.571.51
During the period beginning on the effective date of the permit 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, 20°C"
Total Suspended Residue"
NH3 as N
Dissolved Oxygen —
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Eon4UQ iUui Y_
Discharge Limitations
Monthly Avg. Weekly Avg.
0.425 MGD
30.0 mg/I 45.0 mg/I
30.0 mg/1 45.0 mg/I
4.0 mg/1
200.0 /100 ml 400.0 /100 ml
Monitoring Requirements
Measurement
Sample
'Sample
Daily Max Frequency
TyjLe
Location
Continuous
Recording
I or E
Weekly
Composite
E, I
Weekly
Composite
E, I
Weekly
Composite
E
Weekly
Grab
E, U, D
Weekly
Grab
E,-6rD--
2/Week
Grab
E
Weekly
Grab
E, U, D
Semi-annually
Composite
E
Semi-annually
Composite
E
-XAGeekly--
Grab
_6L1_9_
* Sample locations: E - Effluent, I - Influent, U - Upstream 50 feet, D - Downstream 2 miles at NCSR 1559
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mgA.
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.

Staff Review and Evaluation
NPDES Wastewater Permit
FACILITY INFORMATI
Facility Town of Mars Hill WWTP
NPDES No. NC0057151
Design Flow (MGD) 0.425 MGD
Facility Class II (regional Staff Report 5-16-96)
STREAM CHARACTERISTICS
Stream Name
Gabriel Creek
Stream Class
C
Sub -basin
040304
Drainage Area (mil)
3.22
S7Q10 (cfs)
0.39
W7Q10 (cfs)
0.57
30Q2 (cfs)
0.86
IWC (%)
43
Changes
Parameters Affected
Basis for change(s)
-Proposed
change summer & winter limits
-from 1.5& 3.0to2.0& 4.0m /1
monthly ave for NH3
per DEM policy3 re = P✓A'f
,41'hcs -e- I
Compliance Schedule: None
Special Condition(s): Nutrient Conditis for Permits wooutThosp L mits X%'
Permits &Engineering Comments:\ //AANJ"`SfG�
�� �/j� l/✓�,c�2+C Gir.1
Recommend r�newal of NPDES permit (existing�class 11 facility) with existing limits and with
changes noted abovJ'Facility consists of extended air package plant permitted to discharge up to
0.425 MGD. Compliance Sampling Inspection reports show that the facility is operating well and
typically discharging constituents at concentrations well below limits. Regional Staff Report
indicates no monthly limits violations since 1991. Although, concentrations for TRC are high; of 24
monthly averages samples, values were regularly above 0.9 mg/1, with a max. of 1.9 mg/1.
Prepared by:
Regional Office Evaluation and Recommendations:
� � � .I. A'� Y ��.f} S'V.i�,1 �•JJ �YJ y�f:!/ 1 � .-"� 1 , TT

ve
:W:j
Staff Review and Evaluation
NPDES Wastewater Permit
FACILITY INFORMATION
Facility Town of Mars Hill WWTP
NPDES No. NCO057151
Design Flow (MGD) 0.425 MGD
Facility Class II (regional Staff Report 5-16-96)
STREAM CHARACTERISTICS
Stream Name Gabriel Creek -�
Stream Class C `�
Sub -basin WW4 �
D A ( 'Z 322
rainage rea mi ) .
S7Q10 (cfs) 0.39 ✓ ,� e � %
W7Q10 (cfs) 0.57
30 cfs 0.86 -�
IWC (%) 43�
-Proposed Changes
Parameters Affected
Basis for change(s)
change summer & winter limits
from 1.5 & 3.0 to 2.0 & 4.0 mg/1
monthly ave for NH3
per DEM policy re: BAT for
facilities < 1.0 MGD
Compliance Schedule: None ✓
Special Condition(s): None
Permits & Engineering Comments:
Recommend renewal of NPDES permit (existing class II facility) with existing limits and with
changes noted above. The Division has determined that BAT for NH3 removal for small WWTP is 2.0
and 4.0 mg/l. rat o n
Facility consists of extendeddpackage plant permitted to discharge Aean
25 MGD.
Compliance Sampling Inspection reports show that the facility is operating typically
discharging constituents at concentrations well below limits. Regional Staff Report indicates no
monthly limits violations since 1991. Although, concentrations for TRC are high; of 24 monthly
averages samples, values were regularly above 0.9 mg/l, with a max. of 1.9 mg/l.
Prepared by:
Office Evaluation and Recommendations:
n44

Staff Review and Evaluation
NPDES Wastewater Permit
FACILITY INFORMATION
Facility Town of Mars Hill WWTP
NPDES No. NC0057151
Design Flow (MGD) 0.425 MGD
Facility Class II (regional Staff Report 5-16-96)
STREAM CHARACTERISTICS
Stream Name
Gabriel Creek
Stream Class
C
Sub -basin
040304
Drainage Area (mil)
3.22
S7Q10 (cfs)
0.39
W7Q10 (cfs)
0.57
30Q2 (cfs)
0.86
IWC (%) (0 64
Proposed Changes
Parameters Affected
Basis for change(s)
change summer & winter limits
from 1.5 & 3.0 to 2.0 & 4.0 mg/1
monthly ave for NH3
per DEM policy re: BAT for
facilities < 1.0 MGD
Compliance Schedule: None
Special Condition(s): None
Permits & Engineering Comments:
Recommend renewal of NPDES permit (existing class H facility) with existing limits and with
changes noted above. The Division has determined that BAT for NH3 removal for small WWTP is 2.0 and
4.0 mg/l. 012u
Facility consists of extended--epackage plant permitted to discharge a 0.425 MGD.
Compliance Sampling Inspection reports show that the facility is operating well and typically discharging
constituents at concentrations well below limits. Regional Staff Report indicates no monthly limits
violations since 1991. Although, concentrations for TRC are high; of 24 monthly averages samples, values
were regularly above 0.9 mg/1, with a max. of 1.9 mg/l.
Prepared by:
Regional Office Evaluation and Recommendations:

Permit No. NCO057151 V
E. Nutrient Condition for Permits Without Phosphorus is
This permit may be modified, or revoked and reissued to include an effluent limitation on nutrients
for this discharge depending upon the following:
1. The findings of a study by the Division of Environmental Management determine nutrient
control is necessary.
2. Local actions do not su�eessfully redupe the nutrient loading on the receiving waters.
3. The onset of pro m conditions in the "k-7i
qub

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31) Permit No. NCO057151
During the period beginning on the effective date of the permit 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)
c/" Total Residual Chlorine
_,-Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
✓Conductivity
Discharge Limitations
Monthlv Ava.
0.425 MGD
30.0 mg/I .�
30.0 mg/I
2.0 mg/I
.s l..5'
Weekly Avg,
45.0 mg/1 -
45.0 mg/I
200.0 /100 ml .i 400.0 /100 ml ---
Monitoring
Requirements
Measurement
Sample
*Sample
Daily Max Frequency
T -"
Location
Continuous
Recording
I or E `—
Weekly -
Composite
E, I `
Weekly
Composite
E, I
Weekly
Composite
E
Weekly
Grab
E, U, D '
Weekly ✓
Grab —
E,U,D
2/Week ✓
Grab ✓
E ✓-
Weekly ✓
Grab ,%
E, U, D
Semi-annually
Composite
E �-
Semi-annually -
Composite -
E
Weekly —
Grab —
U, D
* Sample locations: E - Effluent, I - Influent, U - Upstream 50 feet, D - Downstream 2 miles at NCSR 1559
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 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. ,i
There shall be no discharge of floating solids or visible foam in other than trace amounts. t

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NCO057151 .
During the period beginning on the effective date of the permit 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 Discharge Limitations Monitoring Requirements
Measurement Sample *Sample
Monthly Avg. Weekly Avg, Daily Max Frequency Ty"e Location
- Flow 0.425 MGD Continuous Recording ✓ I or E
BOD, 5 day, 200C** 30.0 mg/I ✓ 45.0 mg/l Weekly ✓ Composite ✓ E, I -�
j Total Suspended Residue** 30.0 mg/1 45.0 mg/I ✓ Weekly ✓ Composite ✓ E, l
ZNH3 as N f 4.0 mg/ I� Weekly Composite E
Dissolved Oxygen*** 3'0 Weekly Grab E, U, D
Fecal Coliform (geometric mean) 200.0 /100 ml 400.0 /100 ml Weekly ✓ Grab ✓ E,U,D
Total Residual Chlorine 2/Week ✓ Grab ✓ E -—
Temperature Weekly L,- Grab E, U, D
v Total Nitrogen (NO2 + NO3 + TKN) Semi-annually Composite E
Total Phosphorus Semi-annually Composite - E
Conductivity Weekly ✓ Grab U, D
* Sample locations: E - Effluent, I - Influent, U - Upstream 50 feet, D - Downstream 2 miles at NCSR 1559
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value (85
% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 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.

t
TO: NPDES PERMITS GROUP
ATTN: STEVE PELLEI
FROM: WATER QUALITY SECTION
ASHEVILLE REGIONAL OFFICE
WANDA P. FRAZIER
DATE: May 16, 1996
SOC PRIORITY PROJECT:
Yes .x No
IF YES, SOC NUMBER
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY: Madison"
PERMIT NUMBER: NC0057151
PART I - GENERAL INFORMATION
1. Facility and Address: Town of Mars Hill
Post Office Box 368
Mars Hill, NC 28754
2. bate of Investigation: May 14, 1996
3. Report Prepared By: Wanda P. Frazier
4. Persons Contacted: Robert Sams
Telephone Number: 704-689-9850
5. Directions to Site: From the intersection of US Highway
19-23 and NC Highway 213, travel west on NC Highway 213
0.8 mile. The wastewater treatment facility is located
on the right.
6. Discharge Point(s), List for all discharge points:
Latitude: 35049/38/1 Longitude: 82033/28/1
Attached is a USGS map extract indicating the treatment
facility site and discharge point.
USGS Quad No.: DBSE USGS-Quad Name: Mars Hill, N.C.
7. Site size and expansion area consistent with application?
X Yes No If No, explain:
8. Topography (relationship to flood plain included): The
wastewater treatment plant is not subject to flooding.
9. Locatiori of nearest dwelling: 250 feet to the south.
-1-

10. Receiving stream or affected surface waters: Gabriel Creek
a. Classification: Class C
b. River Basin and Subbasin No.: FBR 04-03-04
C. Describe receiving stream features and pertinent
downstream uses: fish and wildlife propagation,
wading, irrigation.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted (ultimate design
capacity): 0.425 MGD
b. Current permitted capacity of the wastewater treatment
facility: 0.425 MGD
C. Actual treatment capacity of the current facility
(current design capacity): 0.425 MGD
d. Date(s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: n/a
e. Please provide a description of existing or
substantially constructed wastewater treatment
facilities: 0.425 MGD communitor, bar screen, grit
removal, flow meter with totalizer, three aerations
basins, clarifier, aerobic digestor with sludge return,
chlorine contact chamber, sludge drying beds, and
stand-by power (diesel generator)
f. Please provide a description of proposed wastewater
treatment facilities: n/a
g. Possible toxic impacts to surface waters: none
h. Pretreatment Program (POTWs only): none
in development approved
should be required not needed
2. Residuals handling and utilization/disposal scheme:
Land Application
a. If residuals are being land applied, specify DEM permit
number: WQ0004298
b. Residuals Contractor: n/a (Town applies the sludge)
Telephone Number : n/a
-2-

c. Residuals stabilization:
x PSRP PFRP OTHER
d. Landfill:..• n/a
e. Other disposal/utilization scheme (Specify): none
3. Treatment plant classification: Class II
See attached completed rating sheet.
4. SIC Codes(s): 4952
Wastewater Code(s) of actual wastewater, not particular
facilities:
Primary: 01
Secondary:
Main Treatment Unit Code: 06003
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved (municipals only)?
n/a
2. Special monitoring or limitations (including toxicity)
requests: none
3. Important SOC, JOC, or Compliance Schedule dates: n/a
Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
4. Alternative Analysis Evaluation: n/a
Has the facility evaluated all of the non -discharge options
available? Provide regional perspective for each option
evaluated.
Spray Irrigation:
Connection to Regional Sewer System:
Subsurface:
Other disposal options:
5. Other Special Items:
-3-

PART IV - EVALUATION AND RECOMMENDATIONS
The Town of Mars Hill's wastewater treatment facility is properly
operated and consistently complies with current NPDES Permit
limits. There have been no monthly limits violations since 1991.
Therefore, we recommended that the permit be renewed.
Signature of Report Preparer
Water Quality Regional Supervisor
Date
-4-