NC0085111_Permit Issuance_19980526

NPDES DOCIMENT SCANNING COVER :SHEET
NC0085111
Heather Glen WTP
NPDES Permit:
Document Type: 4Permit
Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Staff Report
Instream Assessment
(67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
May 26, 1998
This document is printed on reuse paper - ignore any
content on the re-szerse side

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
May 26, 1998
Mr. Barnette Crabtree
Carolina Water Service, Inc.
P.O. Box 240908
Charlotte, North Carolina 28224
Av"7A
DENR
Subject: Issuance of NPDES Permit NC0085111
Heather Glen Water System
Durham County
Dear Mr. Crabtree:
The Division received your application for a wastewater discharge permit on November 5, 1997.
Division personnel have reviewed and approved your application. Accordingly, we are forwarding
herewith the attached NPDES discharge 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 U.S. Environmental Protection Agency dated December 6, 1983, and as subsequently
amended.
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 note that this permit is not transferable except after notice to the Division. Complete
and submit the enclosed Permit Name / Ownership Change Form if a change in ownership or control
of this discharge occurs. The Division may require modification or revocation and reissuance of the
permit.
This permit does not affect the legal requirements to obtain other permits which may be
required by the Division of Water Quality, the Division of Land Resources, the 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 Paul Clark at telephone number [phone],
extension 580.
Sincerely,
Origin& Signed By
avid A. Goodrich
A. Preston Howard, Jr., P. E.
cc: Central Files
Raleigh Regional Office/Water Quality Section
Mr. Roosevelt Childress, EPA
NPDES Unit
Point Source Compliance Enforcement 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. NC0085111
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT 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,
Carolina Water Service/Southland Associates
is hereby authorized to discharge wastewater from a facility located at
Heather Glen Water System
Heather Ridge Subdivision
Durham
Durham County
to receiving waters designated as unnamed tributary to Sevenmile Creek in the Neuse 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 July 1, 1998
This permit and the authorization to discharge shall expire at midnight on January 31, 2003
Signed this day May 26, 1998
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

SUPPLEMENT TO PERMIT COVER SHEET
Carolina Water Service/Southland Associates
is hereby authorized to:
Permit No. NC0085111
1. Construct and operate a 2' by 2' by 4' deep backwash sump and discharge pipe to discharge
filter backwash water from a greensand filter located at Heather Glen Water system, Heather
Ridge Subdivision, Durham, Durham County (See Part III of this permit), and
2. Discharge from said treatment works at the location specified on the attached map into an
unnamed tributary to Sevenmile Creek which is classified Class SW -IV NSW waters in the
Neuse River Basin.

ROAD CLASSIFICATION
PRIMARY HIGHWAY
HARD SURFACE O
LIGHT -DUTY ROAD. HARD OR
IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE 11 UNIMPROVED ROAD = = =
Latitude: 36°05'14" Longitude: 78'58'34"
Map # 023SW Sub -basin 03-04-01
Stream Class WS IV NSW
Discharge Class 21
Receiving Stream UT - Sevenmile Creek
Design Q: .0000 GPD Permit exp. //3//03
0
SCALE 1:24 000
0 1 MILE
7000 FEET
1
0 1 KILOMETER
CONTOUR INTERVAL 10 FEET
Southland Associates,
Heather Glen WTP
NC0085111
Durham County

A(1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Permit No. NC0085111
Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge 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 1
Flow
NL (MGD)
Monthly
Instantaneous
E
Total Suspended Solids
30.0 mg/I
45.0 mg/I
2/Month
Grab
E
Settleable Solids
0.1 ml/I
0.2 ml/I
Weekly
Grab
E
Turbidity
2
2
Weekly
Grab
U, D
Total Residual Chlorine
Weekly
Grab
E
Iron
Weekly
Grab
E
Total Nitrogen (NO2 + NO3 + TKN)3
NL (mg/I)
NL (Ib/mo)
NL (Ib/yr)
Monthly
Monthly
Annually
Grab
Calculated
Calculated
E
Total Phosphorus
NL (mg/I)
Monthly
Grab
E
Notes:
NL: No Limit
Sample locations: E - Effluent, Upstream, D - Downstream.
2 The discharge shall not cause the turbidity of the receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural background
conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
3 See Supplement to Effluent Limitations and Monitoring Requirements - Special Condition A(2), Total Nitrogen Monitoring.
All samples collected shall be of a representative discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit No. NC0085111
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A(2). TOTAL NITROGEN MONITORING
The Permittee shall calculate annual total nitrogen mass loading as the sum of monthly loadings, according to
the following equations:
(1) Monthly Loading (lb) = Days x TN x Q, x 8.34
where:
Days = the number of discharge days in that month
TN = the average total nitrogen concentration (mg/1) of the grab samples collected during the
month
Q,,, = the average daily waste flow (MGD) for the month
8.34 = conversion factor, from (mg/1 x MGD) to pounds
The annual mass loading is the sum of the monthly loadings:
(2) Annual Mass Loading (1b/yr)= E (Monthly Loadings) for the calendar year
The permittee shall report the total nitrogen concentration for each sample and the monthly mass loading, in the
appropriate monthly self -monitoring report; and the annual total nitrogen mass loading, in the self -monitoring
report for December of each year.

NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL HEALTH
PUBLIC WATER SUPPLY
MEMORANDUM
TO: David Goodrich
Discharge Permits Unit
Division of Environmental Management
FROM: Linda Sewall i°
Division Director
Division of Environmental Health
DATE: April 21, 1998
nab
APR 2 9 1999
POINT SOURCE BRANCH
SUBJECT: Draft National Pollutant Discharge
Elimination System Permit # NC0085111
Heather Glen Water System
Heather Ridge Subdivision
Durham, Durham County
Reference is made to the above mentioned Draft National Pollutant
Discharge Elimination System Permit. We have reviewed this permit
application and determined that the proposed discharge will not be
sufficiently close to any existing or known proposed public water supply
intake so as to create an adverse effect on water quality.
We concur with the issuance of this permit provided the facility is
operated and maintained properly, the stated effluent limits are met prior to
discharge, and the discharge does not contravene the designated water
quality standards.
If we can be of further assistance, please contact us.
LS/MLDIncp
cc: J. Wayne Munden
3800 BARRETT DRIVE, SUITE 101, RALEIOH, NORTH CAROLINA 27609
PHONE [phone] FAX [phone]
AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/10% POST -CONSUMER PAPER

ADD 1vT OF Pt B LIC .TI O
State of North Carolina.
Count of Dumam
being duly sworn
says trsct
she is the P iiidpa► Clerk of The all.f.n
Herald Co., Lnc. publishers of
raid -Sup. ?=l:ers
A N ews p av er published in and of general
drc-ulation in said County, ; and that a i otce of
wi : i c.~ the an i e-: ed is a tu e c o t'v, was . L' b; s i i e
?-! said new sraer one E e
6th April
da.vof 1. .
/O',/'S7
Prrndid" al Clerk
o is
Sworn to and ssbscibed before me t is
8th April
dav k}?, 19
'Not - Y P�ab li c
98
98
My commission ex i_es December 16, 2001
Durha
m Ca:-oLna
PUBLIC NOTICE
STATE OF
NORTH CAROLINA
• ENVIRONMENTAL
I. MANAGEMENT
• COMMISSION
POST OFFICE BOX 29535 I
RALEIGH, NORTH
CAROLINA 27626140535
. • NOTIFICATION' OF
;ILHTENT TO ISSUE A STATE
NPDES PERMIT
On the basis of thorough `
staff review and applica-
i Lion of Article 21 of Chap-
ter 143 General Statutes
Lof aw 9oPublic
2 500 and
lawful standards and reg-
ulations, the North Caro-
lina Environmental Man-
agement Commission
proposes to issue a permit
to discharge toper -
sons belowt
teffective
5/11/98 and subject to
special conditions.
l Persons wishing to com-
, ment upon or object to
Oho proposed determine-
tions are invited to submit
same in Writing to the
above address no later
than 38. All cm-
ments4 received prior to
that date will be consid-
ered in the formulation of
final determinations 're-
garding the proposed per-
mit.
A copyof the draft permit
is available by writing or
call the Division of Envi-
ronmental Management,
P.O. Box 29535, Raleigh,
North Caroline
27626-0535, (919)
733-7015.
The apolication and other
information may be in-
spected at these locations
during normal office
hours. Copies of the infor-
mation on file are avail-
able upon request and
payment of the costs of
reproduction. All such
comments or requests re-
garding a proposed per-
uld make refer-
ence tomit o the NPDES permit
i number listed below.
Dote 3/18/98
David A. Goodirch
A. Preston Howard Jr.,
P.E., Director for Division
of Environmental
Management
Public notice of intent to
issue o State NPDES per-
mit to the following:
1. NPDES No. NC-
0058785. Bible Baptist
2125 East Geer
St ,=Durham, N.C. 27704
has applied for o permit
renewal for a facility lo-
cated on East Geer Street
in Durham Durham
County. The facility dis-
charges 0.003 MGD of
treated domestic waste-
water from one outfall
into on unnamed tributary
to Ellerbe Creek, a class
WS-IV NSW stream in the
Neuse River Basin which
has a 7Q10 flow of 0 cfs
and a 30Q2 flow of 0 cfs.
BOO and ammonia are
water quality limited. The
available load in the im-
mediate vicinity of this dis-
charge mar be consumed
and may effect future al-
locutions.
2. NPDES No. NC-
0056731. Sedgefleld De-
velopment Co. has ap-
plied for a permit renewal
for o facility located at
Grande Oaks Subdivision
on Red Coach Road north-
west of Durham in
Durham County. The facil-
ity discharges 0.0068
MGD of treated domestic
wastewater from one out -
fall into on unnamed trib-
utary to Crooked Creek, a
inclass WS-IV NSW the Nouse River stream
Basin
which and o 30Q2 flow of
w of
0 cfs. BOD and ammonia
are water quality limited.
The available load copac-
ity in the immediate van-
ity of this dischorge may
be consumed and may ef-
fect future allocations.
3. NPDES No.
NC0026824. NC Depart-
ment of Human Re- ,
sources. 12th Street, But- t
net.. NC 27509-1626 has
1\41:41-1

.,l
SliCICGS.3
WISIPMVINIMIWIrrNO one wasiewaterfrom .•,-
outfall info Ledpp"e
Creek, a Class WS-IV
NSW stream in the Neuse
River Basin. No param-
eters ore water duality
limited, but this discharge
may offeci future al-
locations.
7. NPDES No.
NC0043389. Gorman
Baptist Church, 3315 E.
Geer Street, Dued for o
27704 hos oppr'
permit renewal for a focil-
ity located of Gorman
Boptist Church, 3315 E.
Geer Street, Durham,
Durham County. The facil-
ity discharges 0.004 MGD
of treated domestic waste-
water from one outfoll
- into an unnomed tributary
to Ellerbe Creek, o Class
- ' WS IV -NSW stream in the
— - — Neuse River Basin which
hos a 7010 flow of 0 cfs -
and a 30Q2 flow of 0 cfs.
GODS, ammonia and dis-
solved oxygen ore woter
me
quality limit theFovoilable
parameters,
load capacity im-
mediate the i
mediate receiving water
consumed.will be
may affect future woter
quality based effluent lim-
itations for additional dis-
chorgers within this por-
tion of the watershed. No. `
9• NPDES Person
NC0036471.
County Schools, Drawer
1078, Roxboro, foNr a
27573 hos applied
permit renewal for o facil-
ity located at Helena Elo-
ementary School,
15-501 South on NCSR
1715, Timberlake, NC in
Person County. The facility
discharges 0.003 and
0.005 MGD of treated do- I
mestic wastewater from
two outfalls into onUn-
named Tributary e
he
North Flat River, o Class
WS-Ill NSW streom in the
Neuse River Basin which
hos o 7Q10 flow of 0 cfs
and o 30Q2 flow of 0 cfs.
BOD and ammonia ore
woter quality limited. For
some parameters, the
available load capacity, of
receivn
waterrnW lldbeeconsumed.
This may affect future
water
rimiioased efflu-
ent limitations forad-
ditional dischargers within
this portion of the water-
shed.
10. NC-P0059099 NPDESLokeo Ridge
• - -Aero Pork Homeownersln—'
- 'Association, 5607 S Naorth
Drive, Durham, L
Carolina 27704 has op- _
plied for o permit renewal
forPork
Lake Ridge located
Aero
Wastewater Treatment Fo-
'8G
cility, Citation Circle be-
t and 1
Durham Countyy. The focil8-
ity discharges 0.016 MGD
of treated domestic waste-
woter from one outfoll
into on unnomed tributary
- to Panther Crclareeks C NSW
;Lake),
I stream in the Neuse River
has a 7Q10
flo not 0wich cfs and o 30Q2
flow of 0 cfs. BOD and
ammonia ore water qual-
ity limited. The available
lood in the immediate vi-
cinity of this discharge
may effeconsumed
future and
may
l-
locations.
11. NPDES No. NC-
10085111. Carolina Water
Service/Southland5701Associ-
Westpork
I Dies, Post Of-
fice Suite 10Char-
lotte, Box 240908,
lotto NC 28224 has ap-
plied for a permit renewal
for a focility located of
Heother Glen Water Sys-
tem, Heather Ridge Subdi-
vision, Durham, Durham
County. The facility is per -
miffed to discharge
er
backwash from one outfoll
into unnamed tributaryClass
Sevenmile Creek, a
WS IV NSW stream in the
Neuse River Basin. No pa-
rameters ore water quality
limited, betthis fudischarge
e al -
may
locations.
H-S: April 6, 1998
enoge unnogs siueweje eq
'.Y .. J)Sr
:2u00 2D T\�+3S/J c1 1008d
_ _____ __ = - _..vcs.1.1
•
• !2 _
V : �
vN NJn0'83Su.'_,11ad 'z

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0085111
aci pit Y . ` n ormat on
Applicant/Facility Name
Carolina Water Service/Southland Associates
Permitted Flow:
0.00 MGD (No limit specified)
Facility Class:
I
Facility/Permit Status:
(i.e. New, Modification,
Existing or Renewal)
Renewal
County:
Durham .
Stream Characteristics
Receiving Stream:
unnamed tributary to Sevenmile Creek
Stream Classification:
WS-IV NSW
Subbasin:
030401
Drainage Area (mi2):
not necessary to calculate
Summer 7Q10 (cfs)
not necessary to calculate
Winter 7Q10 (cfs):
not necessary to calculate
30Q2 (cfs):
not necessary to calculate
Average Flow (cfs):
not necessary to calculate
IWC (%):
not necessary to calculate
Miscellaneous .
Regional Office:
Raleigh
USGS Topo Quad:
C23SW
Changes Incorporated into Permit Renewal
Proposed Changes .;
{ ° Parameters : Affected {. Basis ;for . change(s)
Addition of Monthly
Monitoring
Total Nitrogen
Neuse NSW Management
Strategy
Addition of Monthly
Monitoring
Total Phosphorus
Neuse NSW Management
Strategy
Quarterly to Monthly
monitoring frequency
Flow
Division policy
Quarterly to 2/month
monitoring frequency
Total Suspended Solids
Division policy
Quarterly to Weekly
monitoring frequency
Settleable Solids, Turbidity,
TRC, Iron
Division policy
Elimination of monitoring
pH
Division policy
Summary
The treatment system has not yet been constructed but would consist of a 2' by 2' by 4'
deep backwash sump and discharge pipe to discharge filter backwash water from a green
sand filter located at Heather Glen Water System, Heather Ridge Subdivision.
The facility would discharge to an unnamed tributary to Sevenmile Creek (Class WS-IV
NSW) in the Neuse River Basin. The discharge would have to travel about 200 feet over
a forest floor with a good leaf litter cover. This would prevent erosion and provide some
natural filtering of the discharge. This could almost be considered a nondischarge system.
Region, please comment on system name: Carolina Water Service vs. Southland.
Page 1 of 2

c\4-
DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
CAROLINA WATER SERVICE/SOUTHLAND ASSOCIATES
NPDES No. NC0085111
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: 3/25/98
Permit Scheduled to Issue: 5/11/98
State Contact
If you have any questions on any of the above information or on the attached
permit, please contact Paul Clark at [phone], extension 580.
Copies of the following are attached to provide further information on the permit
development:
• Existing permit effluent sheets with changes noted (existing facilities only)
• Draft Permit
NPDES Recommendation by:
Regional Office Comments
egional Recommendation by:
Reviewed By:
Regional Supervisor:
NPDES Unit:
ad —Date: 3
Date:
SIDA.-4)---- Date:
Date:
Page 2 of 2

62CI37/41‘ Pc-/7/
A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL
During the period beginning on the effective date of the permit and lasting until expiration, the
outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee
Effluent Characteristics
Lbs/day
Flow
Total Suspended Solids
Settleable Solids
Turbidity
Iron
Total Residual Chlorine
2 f/ A7, 411,
7D),I PAo5 J')arJS
Discharge Limitations
Units (specify)
Mon. Avg. Daily Max Mon. Avg. pally Max,
30.0 mg/I
0.1 ml/I
45.0 mg/I
0.2 ml/I
Permit No. NC0085111.
Permittee is authorized to discharge from
as specified below:
Monitoring Requirements
Measurement Sample *Sample \`
Frequency die Location \�
Quarter vA Instantaneous E
Quafterty-u?kfuj}H Grab E v
Quarterly--- /J ett,1 Grab E
Quarterly- t,Jct "/ Grab U,D
�y U•eeet Grab E
Quarterly— 11)e Grab E
* Sample locations: E - Effluent, U - Upstream, D - Downstream
** The discharge shall not cause the turbidity of the receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural
background conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
All samples collected should be of a representative discharge.
The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored quarterly at the effluent by grab
•amle.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit No. NC0085111
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT 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,
Carolina Water Service/Southland Associates
is hereby authorized to discharge wastewater from a facility located at
Heather Glen Water System
Heather Ridge Subdivision
Durham
Durham County
to receiving waters designated as unnamed tributary to Sevenmile Creek in the Neuse 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
This permit and the authorization to discharge shall expire at midnight on January 31, 2003
Signed this day
DRAFT
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

, Permit No. NC0085111
SUPPLEMENT TO PERMIT COVER SHEET
Carolina Water Service/Southland Associates
is hereby authorized to:
1. Construct and operate a 2' by 2' by 4' deep backwash sump and discharge pipe to discharge
filter backwash water from a greensand filter located at Heather Glen Water system, Heather
Ridge Subdivision, Durham, Durham County (See Part III of this permit), and
2. Discharge from said treatment works at the location specified on the attached map into an
unnamed tributary to Sevenmile Creek which is classified Class SW -IV NSW waters in the
Neuse River Basin.

ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT -DUTY ROAD. HARD OR
HARD SURFACE IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE '
UNIMPROVED ROAD
Latitude: 36°05' 14" Longitude: 78°58'34"
Map # C2 3 SW Sub -basin 0 3- 0 4- 0
Stream Class WS IV NSW
Discharge Class 21
Receiving Stream UT - Sevenmile Creek
Design Q:.0000 GPD Permit exp. 1'3NO3
BM 444_
•;
•
0
1 0 1 KILOMETER
SCALE 1:24 000
0
1 MILE
ra:�:vc swu;>c::�.zrtia::
7000 FEET
CONTOUR INTERVAL 10 FEET
r
Heather len WTP
NC0085111
Durham County

A(1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Permit No. NC0085111
Beginning on the effective date of this permit and lasting through the expiration date, the Permittee is authorized to discharge from Outfall 001. Such
discharges shall be limited and monitored by the Permittee as specified below:
FLUENT LIMITATION'S
Monthly...
Average
Weekly,'.:
Average.
Measurement
Frequency
am p'e
Ty pe.
Sample
ocation 1
Flow
NL (MGD)
Monthly
Instantaneous
E
Total Suspended Solids
30.0 mg/I
45.0 mg/I
2/Month
Grab
Settleable Solids
0.1 ml/I
0.2 ml/I
Weekly
Grab
Turbidity
2
2
Weekly
Grab
Total Residual Chlorine
Weekly
Grab
Iron
Weekly
Grab
U, D
Total Nitrogen (NO2 + NO3 + TKN)3
NL (mg/I)
NL (Ib/mo)
NL (Ib/yr)
Monthly
Monthly
Annually
Grab
Calculated
Calculated
Total Phosphorus
NL (mg/I)
Monthly
Grab
Notes:
NL: No Limit
Sample locations: E - Effluent, Upstream, D - Downstream.
2 The discharge shall not cause the turbidity of the receiving water to exceed 50 NTU. If the turbidity exceeds these levels due to natural background
conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
3 See Supplement to Effluent Limitations and Monitoring Requirements - Special Condition A(2), Total Nitrogen Monitoring.
All samples collected shall be of a representative discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit No. NC0085111
SUPPLEMENT TO EFFLUENT LIMITATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A(2). TOTAL NITROGEN MONITORING
The Permittee shall calculate annual total nitrogen mass loading as the sum of monthly loadings, according to
the following equations:
(1) Monthly Loading (lb) = Days x TN x Q„, x 8.34
where:
Days = the number of discharge days in that month
TN = the average total nitrogen concentration (mg/1) of the grab samples collected during the
month
Q„. = the average daily waste flow (MGD) for the month
8.34 = conversion factor, from (mg/1 x MGD) to pounds
The annual mass loading is the sum of the monthly loadings:
(2) Annual Mass Loading (1b/yr)= E (Monthly Loadings) for the calendar year
The permittee shall report the total nitrogen concentration for each sample and the monthly mass loading, in the
appropriate monthly self -monitoring report; and the annual total nitrogen mass loading, in the self -monitoring
report for December of each year.