NC0026611_Speculative Limits_19981127

NPDES DOCUMENT SCANNING; COVER SHEET
NPDES Permit:
NC0026611
Morehead City WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Meeting Notes
Instream Assessment (67b)
Speculative Limits x
Environmental Assessment (EA)
Document Date:
November 27, 1998
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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
November 27. 1998
Mr. Joe Clayton. Director
Water and Sewer Department
Town of Morehead City
706 ArendeIl Street
Morehead City. North Carolina 28557
ACirA
NCDENR
Subject: Speculative Limits for Morehead City WWTP
NPDES Permit No. NC0026611
Carteret County
Dear Mr. Clayton:
The purpose of this letter is to provide speculative effluent limits for the proposed expansion of
Morehead City's wastewater treatment plant from 1.7 MGD to 2.5 MGD capacity. The information provided in
this letter will supercede a speculative letter sent to you on November 27, 1996.
The speculative limits presented here are based on our understanding of the proposal and of present
environmental conditions. The Division of Water Quality (DWQ) cannot guarantee that it will issue Morehead
City a modified NPDES permit to discharge treated wastewater into waters of the State. Nor can we
guarantee that the effluent limitations and other requirements included in any permit will be exactly as
presented here. Final decisions on these matters will be made only after the Division receives and evaluates a
formal permit application for the City's proposed discharge.
Please be aware that you will have to evaluate this project for environmental impacts before receiving a
modified permit. Anyone proposing to construct new or expanded waste treatment facilities using public funds
or public (state) 1 nds must first prepare an environmental assessment (EA) when wastewater flows (1) equal or
exceed 0.5 MGD or (2) exceed one-third of the 7Q10 flow of the receiving stream. DWQ will not accept a
permit application for a project requiring an environmental assessment until the Division has approved the EA
and sent a Finding of No Significant Impact (FONSI) to the state Clearinghouse for review and comment.
An Environmental Assessment should contain a clear justification for
r the proposed project.- It should
provide an analysis of potential alternatives. including a thorough evaluation of non -discharge alternatives.
Nondischarge alternatives or alternatives to expansion. such as spray irrigation. water conservation, or inflow
and infiltration reduction. are considered to be environmentally preferable to a surface water discharge. In
accordance with the North Carolina General Statutes. the preferred alternative must be the practicable waste
treatment and disposal alternative with the least adverse impact on the environment. If the EA demonstrates
that the project may result in a significant adverse effect on the quality of the environment, you must then
prepare an Environmental Impact Statement. Greg Thorpe of the Water Quality Planning Branch can provide
further information regarding the requirements of the N.C. Environmental Policy Act. You can contact Mr.
Thorpe directly at [phone]. ext. 557.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equall Opportunity Affirmative Action Employer 50% recycled / 10% post -consumer paper

Speculative Limits for Morehead City
Permit No. NC0026611
Page 2
Based on the available information, tentative limits for the Morehead City WWTP at. the expanded
flow of 2.5 MGD are as follows:
Effluent Limits
Summer Winter
Flow (MGD) 2.5 2.5
BON (mg/L) 5 10
NH,-N (mg/L) 1 2
TSS (mg/L) 30 30 '
Dissolved Oxygen (mg/L) 5.0 ' 5.0
Fecal Coliform (#/100 ml) 14 14
pH (SU) 6.8-8.5 .6.8-8.5
Total Residual Chlorine (µg/L) 17 17
Acute Toxicity Pass/Fail P/F @ 90%
with fathead minnow
I trust this response offers sufficient guidance for the Town's proposed treatment plant expansion. If
you have any additional questions about these limits, feel free to contact Mark McIntire at [phone].
extension 553.
Sincerely,
1)4/1/.14L
David A. Goodrich
Supervisor, NPDES Unit
Water Quality Section
cc: Central Files
NPDES Unit Files
Wilmington Regional Office, Water Quality Section
Greg Thorpe, Water Quality Planning Branch

SPECULATIVE DISCHARGE LIMITS
MOREHEAD CITY WWTP
NPDES PERMIT NO. NC0026611
November 27, 1998
The following table presents speculative limits and associated monitoring requirements for the Morehead City
that the Division -will issue anNPDES -permit - modification -nor -that the effluent limitations and other requirer
exactly as presented here. Any future permit will likely include additional monitoring requirements similar to
instream monitoring, which will be modified to reflect applicable monitoring agreements with the Divisibi
ese do not-j uarantee
is clhdetl i , aii =permit will be
e curr nt,permit; including
EFFLUENT CHARACTERISTICS
EFFLUENT LIMITATIONS ,
,r,,
' , " 4MONITbRING REQUIREMENTS
Monthly
Average
Weekly
Average
.'Daily.
Maximum
;fie, Measurement
F,req;;
uency�
Sample
Type
Sample
Location ( 1
)
Flow
2.5 MGD
.t ..
,f , vi .0. - :\
,irtr4Continuous
Recording
I or E
BOD, 5 day, 20°C: Summer2• 3
Winter ' 3
.
5.0 m /L
10.0 mg/L
'' w
-:'.a i =F,,�
:15 0 •mg/L tt
,.' `°. y k ':.• '
t;. ��4 1,
,-. �E
Daily
Composite
I, E
'
NH3 as N: Summer ' 3
4.3
Winter
, t,
, 1.0 mg"lL���>a.
'f r`;µ'4_
�2.0 mg1L '
1'�.� �. ���"
, : y.
. N:': r�
3/Week
_
Composite
E
Total Suspended Solids3 A.
t
30:0 mg/t '` ,,
0 45.0 mg/L
Daily
Composite
I E
Fecal Coliform (geometric mean) - '.:
•Dissolved
r '
.1`4./l00?ml
28 /100 ml
•
Daily'
Grab
E, U, D
Oxygen
traPH
`�t'
a:'
'�' , Shall be greater than or equal to 6.0 mg/L
at all times
Daily'
Grab
E, U, D
.z, .';.._:
�a •
''=u �_ - �,
Shall be within the range of 6.8 to 8.5
Standard units at all times
Daily
Composite
E
4 �
Total Residual C "Ibn.. t,
i --ii • ,, ,
-
17 /L
µg
Daily •
Grab
E
Total Nitrogen,\(NO2 + NO3 + TKN)
_
Monthly'
Composite'
E, U, D
Total Phosphorus
Monthly'
Y
Composite'
P
E, U,D
Chlorophyll -a
•
Monthly'
Composite'
U, D
Temperature
Daily'
Grab
E, Ui D
Conductivity
Daily'
Grab
E, U, D
Acute Toxicity
See Footnote (5)
Quarterly
Composite
E

SPECULATIVE DISCHARGE LIMITS (cont.)
MOREHEAD CITY WWTP
NPDES PERMIT NO. NC0026611
November 27, 1998
Footnotes:
(1) Sample locations: E = Effluent; I = Influent; U = Upstream at the Barbour Road Brid �e;, . . „N. 'n P g �� �wr�stream at the 20 Street
Bridge; (U and D monitoring requirements to be determined based on future perini�at3plic�ation and�'modeling efforts). Instream
sampling for temperature, conductivity, fecal coliform, and dissolved�`oxygen$ alh.bb �conduc eV/week 3/week during the months of
June, July, August and September and weekly during the remainder. of th iyear. �-1 "�s yearn sam ling for total nitrogen, total
phosphorus, and chlorophyll -a shall be collected monthly All instr-eain.'ample �sltaWbe grab's mples.
(2) For the purposes of thispermit, summer is defined as eeri'o �' om`4 `• . P rP p Apr (1. ough October 31, and winter is defined as the
period from November 1 through March 31 of each year,' n . ��kk z
.am_ ' '�
(3) The monthly average BOD5 and Total Suspended So ry: oncentrations shall not exceed 15% of the respective influent values
(85% .L. .
removal). '"•/.
(4) Limit and monitoringre uirement nl a pl �' f-chl Y' r i '
q .., y,_ pp y� � orine Ys added for disinfection.
(5) Acute Toxicity (Fathead Minnow 4 hr.), okSigriii'ficant Mortality at 90%
44
There shall be no dischargebfiloafi ig s� led's r visible foam in other than trace amounts.

GUIDANCE FOR THE EVALUATION OF WASTEWATER DISPOSAL ALTERNATIVES
It is the Division's mandate to assure the most environmentally sound alternative be selected from all
reasonably cost-effective options. Prior to the issuance of an NPDES discharge permit, complete
justification for the discharge must be made through a comprehensive Engineering Alternatives
Analysis (EAA).
The NPDES permit program was developed as a result of the Clean Water Act of 1972. The original
goal of the program (as outlined in the Act) was the elimination of all surface water point source
discharges by 1985. Although we have not achieved this goal, we continue to strive toward it. In that
light, the completion of an EAA is a requirement of any individual or organization applying for a new or
expanding NPDES (discharge permit (Title 15A NCAC 2H.0105 (c) (2)). The purpose of this document is
to provide guidance to the regulated community for the evaluation of wastewater disposal alternatives.
The following outliif should be used in the preparation of EAAs.
In the past, the environmental feasibility and economic feasibility of a particular disposal option have
been segregated. These should not be treated as mutually exclusive analyses. They are dependent on
one another. When evaluating any of the alternatives discussed below, both environmental and
economic feasibility should be addressed.
The following is an outline to be used in preparing an EAA. If any EAA submitted lacks any of these
basic pieces of information, it will be returned as incomplete.
I. General Information
A. Basic Identification of the Project
• Facility) name
• County
• Facility address
• Facility telephone number
• EAA preparer's name
• EAA preparer's mailing address and telephone number
B. Provide a detailed description of the project which will require wastewater disposal.
All wastewater flows associated with this project should be calculated in accordance with
15A NCAC 2H .0219. Justification and demonstration of need should be provided for
expected floNkr volumes including any flow reductions realized through use of flow
restricting devices. For all alternatives, the use of flow -restricting or low -flow devices
should be investigated. A report of the findings should include flow reduction
projections.
C. If existing facilities will be used as part of an expansion, discuss those existing units
including present and past performance, unit capacities and inadequacies and provide a
schematic with component sizes.
D. Indicate if the project will be constructed in phases. Provide the estimated wasteflow
per phase. Indicate current phase status for existing facilities and provide a schedule for
construction lof each additional phase.
II. Evaluation of Disposal Alternatives
The Eng' eering Alternatives Analysis should include an evaluation of any and all
disposal ternatives. The analysis should address all of the following options:
• Conne tion to a Publicly Owned Treatment Works (POTW)
• Connection to a privately owned treatment works
• Individual subsurface systems
• Community subsurface systems
Engineering Alternatives Analysts; October 21. 1998
Page 1 of 5

GUIDANCE FOR THE EVALUATION OF WASTEWATER DISPOSAL ALTERNATIVES
• Drip irrigation - both surface & subsurface
• Spray irrigation
• Reuse
■ Surface water discharge through the NPDES program
■ Any possible combination of the above options
A. Connection to a Sewer Collection System (served by a municipality or other entity
holding a valid NPDES or Non -Discharge Permit).
1. Existing Sewerage System: Indicate the distance to an existing sewer line within a five -mile
radius (extension of radius should be considered if cost effective for project size).
*NOTE: All connection options should include an evaluation of both a gravity line as well
as a force main with pump station(s).
(a) Prqvide a description of sewer facilities and resources necessary to connect to the
receiving wastewater treatment plant.
(b) Provide a preliminary indication of flow acceptance from municipal or private WWTPs
under consideration for connection. If a municipal or private WWTP cannot accept the
watewater, please explain.
(c) Attach a topographic map or a site drawing showing the physical route of this.
alternative.
(d) Perform a Present Value of Costs Analysis for this alternative as outlined in Appendix A
of this document. Investigate cost -sharing options with other potential users.
2. Planned Sewerage System: Determine if an area wide sewerage system within a five mile
radius is projected to be available within the next five years to receive waste from the
project under study. Determine availability date and flow acceptance projection with
appropriate authority. Identify your contact in the public utility or private management
group that assisted you in this determination.
B. Land Based Disposal (Installation of nitrification systems, low pressure pipe systems,
drip irrigation, mound systems, and spray irrigation systems).
1. Determine if the applicant currently owns land that is available and suitable for a
subsurface system.
(a) Provide a description of the facilities and resources necessary including a site plan
indicating the proposed layout.
(b) Provide a soil analysis that includes the information outlined in Appendix B of this
document.
(c) Provide calculations to determine the disposal capacity of the applicant's available land,
based on design and loading rate characteristics as well as appropriate regulations.
(d) Describe what modifications to the plan (such as reducing the number of units
produced, the reduction of design flow, etc.) would be necessary to allow for adequate
disposal using usable land on the site. This step should be performed if there is
insufficient usable land, considering the existing project development plan. If there is
not sufficient usable land, explain why not.
(e) Perform a Present Value of Costs Analysis for this alternative as outlined in Appendix A
of this document.
2. If there is insufficient land on the project site, determine if any additional land could be
acquir d. Provide documentation of availability. If adjacent land could be acquired,
evalua a according to item B (1). If adjacent land is unavailable, provide documentation
from the owner stating such.
NOTE: Subsurface disposal systems require a 100% reserve area. Surface disposal
systems must be capable of treatment to secondary limits including disinfection.
Engineering Alternatives Analysis; October 21, 1998
Page 2 of 5

GUIDANCE FOR THE EVALUATION OF WASTEWATER DISPOSAL ALTERNATIVES
C. Wastewater Reuse Evaluate reusing all or a portion of the wastewater generated on -
site.
D. Surface Water Discharge (a discharge to a flowing stream - defined as having positive
7Q10 and 30Q2 flows).
1. USGS should be consulted for obtaining receiving stream flow information. This
information should be provided in conjunction with treatment plant design. For flow
information contact Mr. Curtis Weaver at [phone].
2. All discharging systems should be evaluated both with and without tertiary filtration
assuming a weekly sampling regime.
3. Provide a description of the proposed discharge facilities, including a schematic diagram of
the major components and a site plan of the treatment facility with outfall line(s). All
discharge systems must meet design criteria outlined in the Division's "Authorization to
Construct Process."
4. Provide documentation of the availability of required land and/or easement agreements.
5. Perform a Present Value of Costs Analysis for this alternative in accordance with Appendix
A of this document.
E. Disposal Combinations: The EAA should evaluate the feasibility of a combination of
any of the above disposal alternatives in lieu of a surface water discharge.
Appendix A
Present Value of Costs
The Present Value of Costs Analysis (PVCA) is meant to evaluate all costs associated with a particular
disposal alternative over the life of the project. Prior to performing a PVCA for any of the alternatives,
all costs must be identified. The PVCA should include all monetary costs associated with construction,
startup and operation of a facility. Costs should include, but not be limited to, the following:
Capital Costs
• Land acquisition costs
• Equipment costs
• Labor costs
• Installation costs
• Design costs
Recurring Costs
• Operation and maintenance costs (with replacement costs)
• Laboratory costs assuming a weekly monitoring regime for discharge systems and a monthly regime
for non -discharge systems
• Operator and support staff costs
• Residual disposal costs
• Connection and subsequent user fees
• Permit and compliance fees
• Utility costs (power, water. etc.)
Opportunity Costs
NOTE: All cost information provided must be referenced. If vender quotes have been received for
treatment units or other components, they shall be included as well.
Engineering Alternatives Analysis; October 21, 1998
Page 3 of 5

GUIDANCE FOR THE EVALUATION OF WASTEWATER DISPOSAL ALTERNATIVES
Present Value of Costs
Costs incurred in different time periods must be converted to a common time period before they can be
accurately combined or compared. Performing this calculation is known as "computing the present
value," or "discounting" the costs. Present value is also sometimes called "present discounted value" or
"present worth".
The following standard formula for computing the present value must be used in all cost estimates
made under this evaluation guidance:
n C*
PV=C +�
° r=1 (1+r)r
Where:
PV = Present value of costs.
Co = Costs incurred in the present year.
Ct = Cost incurred in time t.
t = Time eriod after the present year ( The present year is t = 0)
n = Endi g year of the life of the facility.
r = Disco t rate. For these calculations. an interest rate quoted by the lending institution
should be used. The interest rate quote should be provided with this analysis.
However, if the costs are the same in every time period from year one through year n (i.e., Ct = C, a
constant for t = 1,2,..., n), then the formula reduces to:
PV = C + (1 + r)"
r(1 +
In this case, the present value may also be looked up in a table containing the present value of
annuities (an annuity is a constant amount payable in each year for a certain number of years). Such
tables are available from financial institutions.
Engineering Alternatives Analysis: October 21, 1998
Page 4 of 5

GUIDANCE Ft. THE EVALUATION OF WASTEWATER DISPOSAL ALTERNATIVES
Appendix B
Soil Analysis Report Requirements
For all new facilities
The EAA must include a detailed soil analysis report including, but not be limited to, the
following:
• A copy of field notes and boring log information
• A soils site map overlain on a topographic map (county soil maps may be used for
delineating boring locations only, not for soil characterization).
• Soil ch racterization in terms of texture, structure, permeability, wetness and mineralogy
• Soil characterization to a depth of 48" or to a restrictive horizon
• Soil loading rate recommendations and land area requirements
The report should address the applicability of any surface or subsurface disposal alternative.
For existing facilities proposing an expansion
The EAA must include a detailed soil analysis report including, but not be limited to, the
following:
• Countysoil maps used to identify on -site soils.
P �Y
• Best-c se loading rates using these soil characterizations.
• PVCA (ee above) .
If the present value for a non -discharge alternative is less than for a discharge system,
provide a more detailed soil analysis report including the following:
• A copy of field notes and boring log information
• A soils site map overlain on a topographic map (county soil maps may be used for
delineating boring locations only, not for soil characterization) .
• Soil characterization in terms of texture, structure, permeability, wetness and mineralogy
• Soil characterization to a depth of 48" or to a restrictive horizon
• Soil loading rate recommendations and land area requirements
Engineering Alternatives Analysis; October 21, 1998
Page 5 of 5

Flow
Permitted fl
Loading Summary for Oxygen Consuming Wastes and Nutrients
Morehead City WWTP/Calico Creek "SC"
2/26/98
AHM
w = 1.7 MGD
Average summer flow ('97) = 1.20 MGD
Average an ual flow ('97) = 1.25 MGD
Average summer flow ('96) = 1.523 MGD
Average annual flow ('96) = 1.404 MGD
Speculative limits have been requested for 2.5 and 3.0 MGD.
BODS
Permitted 1 ad = 284 lb/d
Average summer load ('97) = 84.4 lb/d
Average annual load ('97) = 88.4 lb/d
Average summer load ('96) = 127 lb/d
Average annual load ('96) = 123 lb/d
Current limit: 20 mg/L (S) / 30 mg/L (W)
At a 5 mg/L limit- load = 71 lb/d (1.7 MGD)
At a 5 mg/L limit -load = 104.2 lb/d (2.5 MGD)
At a 5 mg/L limit -load = 125.1 lb/d (3.0 MGD)
Ammonia
Permitted load = monitor
Average summer load ('96)= 11.3 lb/d
Average annual load ('96)= 10.8 lb/d
Average summer load ('97)= 18.21 lb/d
Average annual load ('97)= 15.74 lb/d
At a 2 mg/L limit- load = 28.3 lb/d (1.7 MGD)
At a 1 mg/L limit- load = 14.2 lb/d (1.7 MGD)
At a 2 mg/L limit- load = 41.7 lb/d (2.5 MGD)
At a 1 mg/L limit- load = 20.8 lb/d (2.5 MGD)
At a 2 mg/L limit- load = 50.0 lb/d (3.0 MGD)
At a 1 mg/L limit- load = 25.O lb/d (3.0 MGD)
TP
Permitted load = monitor
Average s mmer load ('96) = 22.O lb/d
Average a nual load ('96) = 16.9 lb/d
At a 2 m limit load = 28.4 lb/d (assuming Qw = 1.7 MGD)
At a 1 m limit load = 14.2 lb/d (assuming Qw = 1.7 MGD)
At a 0.5 mg/L limit load = 7.1 lb/d (assuming Qw = 1.7 MGD)
At a 2 mg/L limit load = 41.7 lb/d (assuming Qw = 2.5 MGD)
At a 1 mg/L limit load = 20.8 lb/d (assuming Qw = 2.5 MGD)
At a 0.5 mg/L limit load = 10.4 lb/d (assuming Qw = 2.5 MGD)

A
TN
Permitted load = monitor
Average summer load ('96) = 53.8 lb/d
Average annual load ('96) = 54.8 lb/d
Average summer load ('97) = 154.7 lb/d
Average annual load ('97) = 113.5 lb/d
At a 6 mg/L limit- load = 85.O lb/d (1.7 MGD)
At a 4 mg/L limit- load = 56.7 lb/d (1.7 MGD)
At a 2 mg/L limit- load = 28.3 lb/d (1.7 MGD)
At a 1 mg/L limit- load = 14.2 lb/d (1.7 MGD)
At a 6 mg/L limit- load = 125.1 lb/d (2.5 MGD)
At a 4 m limit- load = 83.4 lb/d (2.5 MGD)
At a 2 m limit- load = 41.7 lb/d (2.5 MGD)
At a 1 mg/L limit- load = 20.8 lb/d (2.5 MGD)
At a 6 mg/L limit- load = 150.1 lb/d (3.0 MGD)
At a 4 mg/L limit- load = 100.O lb/d (3.0 MGD)
At a 2 mg/L limit- load = 50.0 lb/d (3.0 MGD)
At a 1 mg/L limit- load = 25.O lb/d (3.0 MGD)
Note: DMR data from 12/96 through 11/97 was used to calcuate '97 average annual concentrations and
loads. Summer data collected during the period April thru October.

DFS3650I SESSION READY FOR INPUTGKEX88/MP
COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 1
PERMIT--NC0026611 PIPE--001 REPORT PERIOD: 9612-9711 LOC---E
FACILITY--MOREHEAD CITY, TOWN-WWTP DESIGN FLOW-- 1.7000 CLASS--3
LOCATION--MOREHEAD CITY REGION/COUNTY--08 CARTERET
50050 00310 00530 00610 31616 50060 00300 TGE3E
MONTH Q/MGD BOD RES/TSS NH3+NH4- FEC COLI CHLORINE DO MYSD24PF
LIMIT F 1.7000 F 30.00 F 30.0 NOL F 86.0 NOL NOL NOL
96/12 1.3633 7.49 18.7 .88 5.7 1.009 8.90
97/01 1.3151 7.75 15.2 .89 3.1 1.377 9.62
97/02 1.2756 8.62 15.6 .89 6.1 1.314 9.21
97/03 1.3086 8.13 14.9 .99 4.9 1.283 8.69
1
LIMIT F 1.7000 F 20.00 F 30.0 NOL F 86.0 NOL NOL NOL
97/04 1.1551 7.53 15.5 .70 2.5 1.336 8.67
9/7/05 1.1474 8.96 16.4 5.37 5.8 1.083 8.08 1
97/06 1.1564 10.00 15.7 1.20 23.4 .846 7.46
97/07 1.1343 8.16 12.7 1.21 75.9 1.045 6.66
97/08 1.1722 7.82 14.9 1.50 34.7 1.203 6.47
97/09 1.3549 7.21 13.9 1.32 17.8 .873 6.38
97/10 1.2766 9.32 17.1 1.47 18.3 .690 7.01
1
LIMIT F 1.7000 F 30.00 F 30.0 NOL F 86.0 NOL NOL NOL
97/11 1.3490 10.81 17.8 1.80 6.9 1.210 7.91
AVERAGE 1.2507 8.48 15.7 1.51 17.0 1.105 7.92 1
MAXIMUM 2.6100 23.40 31.5 18.00 6500.0 2.800 10.90 1
MINIMUM .9160 2.50 3.0 .20 LESSTHAN .100 5.20 1
UNIT MGD MG/L MG/L MG/L #/100ML MG/L MG/L PASS/FAI

Y.
GKEX88/MP
COMPLIANCE EVALUATION ANALYSIS REPORT
01/26/98
PAGE 2
PERMIT--NC0026611 PIPE--001 REPORT PERIOD: 9612-9711 LOC---E
FACILITY--MOREHEAD CITY, TOWN-WWTP DESIGN FLOW-- 1.7000 CLASS--3
LOCATION--MOREHEAD CITY REGION/COUNTY--08 CARTERET
MONTH
00010 00400 00600 00665
TEMP PH TOTAL N PHOS-TOT
LIMIT NOL 8.5 6.8
96/12 15.43 7.8-7.3
97/01 13.40
97/02 14.0
97/03 16.87
LIMIT NOL
97/04 17.2
97/05 20.04 7.9-7.5
97/06 23.26 7.8-7.0
97/07 26.22 7.8-7.4
97/08 25.70 7.9-7.2
97/09 24.48 7.7-7.4
97/10 21.40 7.9-7.4
LIMIT
97/11
NOL 8.5 6.8
17.33 7.9-7.5
AVERAGE 19.62
MAXIMUM 27.40
MINIMUM 10.710
UNIT DEG.0
NOL NOL
1.100 .1000
7.7-7.4 3.190 2.0800
7.7-7.5 1.830 2.0000
7.9-7.4 1.500 1.9000
8.5 6.8 NOL NOL
7.8-7.5 2.230 2.1900
35.000 3.4000
14.700 3.8000
16.200 3.5600
15.720 3.1500
8.930 3.0000
NOL NOL
19.400 1.9000
10.890 2.4618
7.900 35.000 3.8000
7.000 1.100 .1000
SU MG/L MG/L

` 7C1‘7
GKEX88/MP
COMPLIANCE EVALUATION ANALYSIS REPORT
01/26/98
PAGE 1
PERMIT--N60026611 PIPE--001 REPORT PERIOD: 9601-9612 LOC---E
FACILITY--MOREHEAD CITY, TOWN-WWTP DESIGN FLOW-- 1.7000 CLASS--3
LOCATION--MOREHEAD CITY REGION/COUNTY--08 CARTERET
MONTH
LIMIT
96/01
LIMIT
96/02
96/03
LIMIT
96/04
96/05
96/06
96/07
96/08
96/09
96/10
LIMIT
96/11
96/12
1.418? 10.09
1.7506F
2.428 F 8.57
1.7654F
F 1.7000 F 30.00 F
1.2130 7.71
1.3633
50050 00310 00530 00610 31616 50060 00300 TGE3E
4/MGD BOD RES/TSS NH3+NH4- FEC COLI CHLORINE DO MYSD24PF
F 1.7000 F
1.1485
30.00 F 30.0 NOL F 86.0 NOL NOL
14.40 13.5 2.04 5.4 1.429 10.32
F 1.7000 F 30.00 F
1.2798 14.93
30.0 NOL F 86.0 NOL NOL NOL
13.9 .60 3.1 1.127 9.55 1
1.1806 11.16 13.1 .62 3.4 1.074 9.20
F 1.7000 F 20.00 F
1.1352 12.09
1.0976
30.0 NOL F 86.0 NOL NOL NOL
14.6 1.43 8.1 1.124 9.13
11.55 14.0 .67 3.8 .964 7.94 1
1.0664 10.06 15.1 .71 62.2 .936 7.05
16.1 .87 74.1 1.096 7.15
8.60 17.3 .64 65.7 .974 6.65
18.3 1.02 32.9 1.576 6.06
8.96 16.4 .88 14.8 1.180 7.11
30.0 NOL F 86.0 NOL NOL NOL
15.8 .66 2.5 1.093 8.34 1
7.49 18.7 .88 5.7 1.009 8.90
AVERAGE 1.4040 10.46 15.5 .91 23.4 1.131 8.11 1
MAXIMUM 4.8020 20.80 37.0 4.29 13500.0 2.800 14.00 2
MINIMUM .951p 2.50 3.0 LESSTHAN LESSTHAN .200 5.30 1
UNIT MGD MG/L MG/L MG/L #/100ML MG/L MG/L PASS/FAI

GKEX88/MP 01/26/98
• COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 2
PERMIT--NC0026611 PIPE--001 REPORT PERIOD: 9601-9612 LOC---E
FACILITY--MOREHEAD CITY, TOWN-WWTP DESIGN FLOW-- 1.7000 CLASS--3
LOCATION--MOREHEAD CITY REGION/COUNTY--08 CARTERET
00010 00400 00600 00665
MONTH TEMP PH TOTAL N PHOS-TOT
LIMIT NOL 8.5 6.8 NOL NOL
96/01 11.88 7.8-7.5 1.660 2.0200
LIMIT NOL 8.5 6.8 NOL NOL
96/02 12.23 7.9-7.5 4.600 2.5100
96/03 13.42 7.9-7.6 4.360 .1500
LIMIT NO 8.5 6.8 NOL NOL
96/04 16.95 7.8-7.6 10.060 2.0600
96/05 21.22 7.9-7.5 4.180 1.8300
96/06 24.90 7.9-7.6 2.640 .3400
96/07 26.28 8.0-7.5 1.880 1.9800
96/08 26.20 7.6-7.3 4.420 1.2000
96/09 24.75 7.5-7.1 3.160 3.0300
96/10 21.5 7.7-7.4 3.330 1.6500
LIMIT NOL 8.5 6.8 NOL NOL
96/11 17.69 7.8-7.4 14.760 .4000
96/12 15.43 7.8-7.3 1.100 .1000
AVERAGE 19.37 4.679 1.4391
MAXIMUM 27.00 8.000 14.760 3.0300
MINIMUM 7.00 7.100 1.100 .1000
UNIT DEG. SU MG/L MG/L

•
Memorandum
North Carolina Division of Water Quality
Modeling/TMDL Unit
To: Rick Shiver
From: Andrew McDaniel Am
Through: uth Swanek QcD
ave Goodrich' b
Date: February 11, 1998
Subject: Town of Morehead City
WLA Request
Permit No. NC0026611
Carteret County
In your m mo to Don Safrit dated November 12, 1997 the WiRO requested a waste load
allocation for an increase in the Town's discharge from the current permitted flow of 1.7
MGD to 2.5 MGD or 3.0 MGD. Attached are speculative effluent limitations for the
expanded flows in permit page format.
The receiving stream, Calico Creek, is a class SC water body that flows east into the
Newport River near the Beaufort Inlet. Water quality violations of the dissolved oxygen
(DO) standard have been recorded for many years, which has in part contributed to an
impaired use support classification of Partially Supporting. As outlined in the February
1997 White Oak Basinwide Plan, biological data also indicates that the water body is
severely stressed. These water quality problems have been exacerbated by non -point
source pojlution draining into the creek from the surrounding urbanized area. Possibly
compounding the problem further is the fact that the creek is influenced by tidal
fluctuations. Dye studies suggest that during flooding tides Morehead City's effluent is
pushed f upstream where it remains for several tidal cycles. Water exchange in the
lower po ion of the creek is high during tidal cycles and thus this area flushes relatively
well.
Intensive sampling conducted by the Town during the summer of 1995 included 18
instream chlorophyll -a samples above the state standard, including four samples above
100 ug/L. Instream total nitrogen concentrations during the summer of 1995 averaged
approximately 5 mg/L. These data suggest that nutrients may be contributing to the
impairment of Calico Creek. The inclusion of an instream monitoring requirement for
chlorophy41-a, total nitrogen, and total phosphorus is recommended at permit renewal as
well as in any permit for an expanded waste flow.

c
Based on a modeling analysis of Calico Creek completed in 1990 as well as the observed
physical, chemical, and biological water quality data, removal of the discharge continues
to be the recommended management strategy. If removal of the discharge is not an
option then the facility should be required to meet advanced tertiary limits as outlined in
the attached speculative effluent pages. Nutrient removal, as noted in the 1990 modeling
report, may also be necessary to achieve water quality goals. Nutrient limits are not
recommended at this time, however the Town should be notified that the Division is
concerned about nutrient -related water quality impacts, and that nutrient limits may be
assigned in the future. If new facilities are to be constructed then treatment technologies
o c such as idation ditches, which provide the operational flexibility for biological nutrient
removal, should be considered.
The Modeling/TMDL Unit would like to receive comments from the WiRO on the 86
/100 mL fecal coliform limit and whether or not a 14/100 mL limit upon expansion would
be appropriate. The 86/100 mL limit has been included in waste load allocations since
the mid-1980s and was originally calculated using a procedure no longer in use. The
outfall is approximately 1.5 miles from SA waters which are currently closed to shell
fishing. I%stream fecal counts are frequently many orders of magnitude higher than the.
200/100mL standard. The facility appears to be consistently meeting the 86/100 mL limit
which suggests that non -point sources are a significant contributor to the elevated fecal
levels.
If you hair a any questions please do not hesitate to contact me at 919-733-5083 ext 513.
cc: Modeling/TMDL Unit
Permits and Engineering Unit
Central Files

A. SPECULATIVE EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31)
Permit No. NC0026611
During the period beginning upon expansion over 1.7 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
LIMITS •
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily Maximum
Measurement
Frequency •
Sample
Type
Sample
Locations
Flow (MGD)
2.5
Continuous .
Recording
I or E
BOD52
5.0 mg/L
7.5 mg/L
Daily
Composite
E
Total Suspended Solids2
30.0 mg/L
45 mg/L
Daily
Composite
E
Dissolved 0xygen3,6
Daily
Grab
E, U, D
pH4
Daily
Grab
E
NH3-N
1.0 mg/L
Daily
Composite
E
Total Residual Chlorines
17.0 ug/L
Daily
Grab
E
Temperature (OC)6
Daily
Grab
E, U, D
Conductivity6
Daily
Grab
'E, U, D
Fecal coliform (geometric mean) 6
86/100 mL
172/100 mL
Daily
Grab
E, U, D
Chlorophyll-a7
Monthly -
Composite
U, D
Total Nitrogen (NO2+NO3+TKN) 7
Monthly
Composite
E, U, D
Total Phosphorus?
Monthly
Composite
E, U, D
Acute Toxicity8
Quarterly
Composite
E
Notes:
Sample Locations: E - Effluent, I - Influent, U — Upstream at the Barbour Road bridge, D - Downstream at the N. 20`h Street bridge.
2 See BOD and TSS Limitations section of the Supplement to Effluent Limitations.
3 The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/L.
4 The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units.
5 Monitoring requirementappliesonly_if_cblorine is added for disinfection.
6 Instream monitoring for temperature, dissolved oxygen (corrected for salinity), fecal coliform, and conductivity shall be conducted 3/week during the months of June, July,
August and September and weekly during the rest of the year.
7 Instream monitoring for total nitrogen, total phosphorus, and chlorophyll -a shall be conducted once per month via a grab sample.
8 Acute Toxicity (Mysidopsis bahia) P/F Limit CO 90%; February, May, August, November; See Chronic Toxicity section of the Supplement to Effluent Limitations.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. SPECULATIVE EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 — March 31) Permit No. NC0026611
During the period beginning upon expansion over 1.7 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
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily Maximum
Measurement
Frequency
Sample
Type
Sample
Location1
Flow (MGD)
2.5
Continuous
Recording
I or E
BOD52
10.0 mg/L
15.0 mg/L
Daily
Composite
E
Total Suspended Solids2
30.0 mg/L
45 mg/L
Daily
Composite
E
Dissolved Oxygen3,6
Daily
Grab
E, U, D
pH4
Daily
Grab
E
NH3-N
2.0 mg/L
Daily
Composite
E
Total Residual Chlorines
17.0 ug/L
Daily
Grab
E
Temperature (°C)6
Daily
Grab
E, U, D
Conductivity6
Daily
Grab
E, U, D
Fecal coliform (geometric mean) 6
86/100 mL
172/100 mL
Daily
Grab
E, U, D
Chlorophyll-a7
Monthly
Composite
U, D
Total Nitrogen (NO2+NO3+TKN) 7
Monthly
Composite
E, U, D
Total Phosphorus?
Monthly
Composite
E, U, D
Acute Toxicity8
Quarterly
Composite
E
Notes:
Sample Locations: E - Effluent, I - Influent, U — Upstream at the Barbour Road bridge, D - Downstream at the N. 20th Street bridge.
2 See BOD and TSS Limitations section of the Supplement to Effluent Limitations.
3 The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/L.
4 The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units.
Monitoring -requirement -applies only _if_chlorine_is_addedfor_disinfection.
s lnstream monitoring for temperature, dissolved oxygen (corrected for salinity), fecal coliform, and conductivity shall be conducted 3/week during the months of June, July,
August and September and weekly during the rest of the year.
7 Instream monitoring for total nitrogen, total phosphorus, and chlorophyll -a shall be conducted once per month via a grab sample.
8 Acute Toxicity (Mysidopsis bahia) P/F Limit @ 90%; February, May, August, November; See Chronic Toxicity section of the Supplement to Effluent Limitations.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. SPECULATIVE EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 — October 31)
Permit No. NC0026611
During the period beginning upon expansion over 1.7 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
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily Maximum
Measurement
Frequency
Sample
Type
Sample
Location1
Flow (MGD)
3.0
Continuous
Recording
I or E
BOD52
5.0 mg/L
7.5 mg/L
Daily
Composite
E
Total Suspended Solids2
30.0 mg/L
45 mg/L
Daily
Composite
E
Dissolved Oxygen3.6
Daily
Grab
E, U, D
pH4
Daily
Grab
E
NH3-N
1.0 mg/L
Daily
Composite
E
Total Residual Chlorines
17.0 ug/L
Daily
Grab
E
Temperature (OC)6
Daily
Grab
E, U, D
Conductivitys
Daily
Grab
E, U, D
Fecal coliform (geometric mean) 6
86/100 mL
172/100 mL
Daily
Grab
E, U, D
Chlorophyll -a'
Monthly
Composite
U, D
Total Nitrogen (NO2+NO3+TKN) 7
Monthly
Composite
E, U, D
Total Phosphorus?
Monthly
Composite
E, U, D
Acute Toxicity8
Quarterly
Composite
E
Notes:
2
3
4
5
Sample Locations: E - Effluent, I - Influent, U — Upstream at the Barbour Road bridge, D - Downstream at the N. 20`h Street bridge.
See BOD and TSS Limitations section of the Supplement to Effluent Limitations.
The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/L.
The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units.
Monitoringiequirement applies only if chlorine is added for disinfection.
6 Instream monitoring for temperature, dissolved oxygen (corrected for salinity), fecal coliform, and conductivity shall be conducted 3/week during the months of June, July,
August and September and weekly during the rest of the year.
7 Instream monitoring for total nitrogen, total phosphorus, and chlorophyll -a shall be conducted once per month via a grab sample.
8 Acute Toxicity (Mysidopsis bahia) P/F Limit 0 90%; February, May, August, November; See Chronic Toxicity section of the Supplement to Effluent Limitations.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A. SPECULATIVE EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 — March 31) Permit No. NC0026611
During the period beginning upon expansion over 1.7 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
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily Maximum
Measurement
Frequency
Sample
Type
Sample
Location1
Flow (MGD)
3.0
Continuous
Recording
I or E
BOD52
10.0 mg/L
15.0 mg/L
Daily •
Composite
E
Total Suspended Solids2
30.0 mg/L
45 mg/L
Daily
Composite
E
Dissolved Oxygen3,6
Daily
Grab
E, U, D
pH4
Daily
Grab
E
NH3-N
2.0 mg/L •
Daily
Composite
E
Total Residual Chlorines
17.0 ug/L
Daily
Grab
E
Temperature (oC)6
Daily
Grab
E, U, D
Conductivity6
Daily
Grab
E, U, D
Fecal coliform (geometric mean) 6
86/100 mL
172/100 mL
Daily
•
Grab
E, U, D
Chlorophyll-a7
Monthly
Composite
U, D
Total Nitrogen (NO2+NO3+TKN) 7
Monthly
Composite
E, U, D
Total Phosphorus?
Monthly
Composite
E, U, D
Acute Toxicity8
Quarterly
Composite
E
Notes:
Sample Locations: E - Effluent, I - Influent, U — Upstream at the Barbour Road bridge, D - Downstream at the N. 20th Street bridge.
2 See BOD and TSS Limitations section of the Supplement to Effluent Limitations.
3 The daily average dissolved oxygen effluent concentration shall not be less than 6.0 mg/L.
4 The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units.
5 Monitoring requirement applies -only -if -chlorine -is -added -for disinfection.
6 Instream monitoring for temperature, dissolved oxygen (corrected for salinity), fecal coliform, and conductivity shall be conducted 3/week during the months of June, July,
August and September and weekly during the rest of the year.
7 Instream monitoring for total nitrogen, total phosphorus, and chlorophyll -a shall be conducted once per month via a grab sample.
8 Acute Toxicity (Mysidopsis bahia) P/F Limit @ 90%; February, May, August, November; See Chronic Toxicity section of the Supplement to Effluent Limitations.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

MEMORANDUM
TO:
FROM: Rick
SUBJECT:
DIVISION OF WATER QUALITY
Water Quality Section
Wilmington Regional Office
November 12, 1997
Don Safr
Shiver
Town of Morehead
WLA Request
NPDES Permit No.
Carteret County
City
NC0026611
V_ef f
-
As you know, the subject permit is currently up for renewal and
expired in July 1997. The WiRO has met with the Town, and the
Town is considering all of its options before making a decision
on which way to proceed with upgrade.
The WiRO is requesting that a WLA for the flows as listed on
the attached letter from the Town be processed as soon as
possible so that the Town and the Division can come to an
agreement on the new permit.
RSS:BSW: S\MEMOS\867.097
itktt
��1
105600/4
("If fihr9X1C/
t

ii
NCDEHNRWIRQ
j JOHN F. NE.80N,.Meyor. Pro Tem
• ',PAUL W.,CORDOVA
' I NICHO AS.J,'Nick' OALANTIS
a: A. "Jiffy' JONES'.
I CALVIN Q. WELLONS
Rick Shiver
D vision of Water Quality
127 N. Cardinal Drive Extension
Wi]lrnington, NC 28405-3$45
Fax : [phone]
Jan 26 '98 10:15 P.01
M o"rt; w. 0: "alit. HoKroN, ►t„ a+
1` OREHIEA D C!
Y
N 0!': i; R 11'1 H C, . ql R 0 L I N A
100 ARENDELL ST.
R0. DRAWER
MOREHEAD CITY. NC 28057
TEL Rio) 72e-eea8
FAX [phone]
RECEiVE'D H0V 0 3 1997
-
,October 30, 1997
II,
RE: `Waste Load Allocation
Proposed WWTP.Expansion
:Morehead City,: NC
Dear Mr_ Shriver.:
R. RANDY M TIN
City Mane r
Please provide a projected waste load allocation for the expansion.;of the:Town
of Morehead City 1.7 MGD Wastewater Treatment Plant To a 2.5 MGD design flow
and a 3.0 MGD Design Flow. 1 The Town of Morehead City needs the projected
al:locatiott in .order to accommodate the planning process to expand the Wastewater
Treatment Plant. •
Ij
Post Its Fax Nate.
RRM/jh
cc: Joe Clayton, Public Utilities Director
File
Sincerely,
Randy Mtin,
City Manager
I•
i•
ADA/E0E/P Equal Opportunity Employer Provider
;3

Morehead City WWTP
NC0026611
Qw=1.7 MGD
Calico Creek "SC"
• Morehead City WWTP has a permit to discharge 1.7 MGD into Calico Creek, a class SC stream that
flows east into the Newport River near the Beaufort Inlet.
• The current permit limits for conventional parameters are as follows:
Monthly Average
Summer Winter
Wasteflow (MGD): 1.7 1.7
BOD5 (mg/1): 20.0 30.0
NH3N (mg/1): monitor monitor
DO (mg/1): 5.0 5.0
TSS (mg/1): 30.0 30.0
Fecal Col. (/100 ml): 86.0 86.0
pH (SU): 6.8-8.5 6.8-8.5
Residual Chlorine (pg/1): monitor monitor
Temperature (C): monitor monitor
TP (mg/1): monitor monitor
TN (mg/I): monitor monitor
Acute Toxicity P/F Qtrly
• Water duality violations of the state standard for dissolved oxygen and chlorophyll -a have been
occurring in Calico Creek for many years (see attached graphs). These problems have been
exacerbated by the fact that Calico Creek is poorly flushing and tidally influenced.
• Nutrie is as well as oxygen consuming wastes are believed to be significant contributors to the
impairIent of Calico Creek.
• Dye studies indicate that the effluent remains in the vicinity of the discharge for at least one complete
tidal cycle.
• The City is severely limited in choices for alternative sites for a surface water discharge as most of the
major water ways surrounding the city are classified SA. The SA waters at the confluence of Calico
Creek and the Newport River are currently closed to shell fishing.
• A modeling analysis of Calico Creek was completed in 1990. Based on the modeling report removal
of the discharge was recommended in the White Oak Basinwide Plan. The report indicates that if
removal of the discharge is not an option then the facility should be required to meet advanced tertiary
limits i cluding nutrient removal for nitrogen and phosphorus.

Loading Summary for Oxygen Consuming Wastes and Nutrients
Morehead City WWTP/Calico Creek "SC"
GODS
Permitted load = 284 lb/d
Average summer load = 127 lb/d
Average annual load = 123 lb/d
Current limit: 20 mg/L (S) / 30 mg/L (W)
At a 5 mg/L limit load = 71 lb/d (assuming Qw = 1.7 MGD)
At a 5 mg/Ll limit load = 104.2 lb/d (assuming Qw = 2.5 MGD)
Ammonia
Permitted load = monitor
Average summer load = 11.3 lb/d
Average annual load = 10.8 lb/d
No limit in current permit
At a 2 mg/L limit load = 28.3 lb/d (assuming Qw = 1.7 MGD)
At a 1 mg/L limit load = 14.2 lb/d (assuming Qw = 1.7 MGD)
At a 2 mg/L limit load = 41.7 lb/d (assuming Qw = 2.5 MGD)
At a 1 mg/L limit load = 20.8 lb/d (assuming Qw = 2.5 MGD)
TP
Permitted load = monitor
Average summer load = 22.0 lb/d
Average annual load = 16.9 lb/d
At a 2 mg/L limit load = 28.4 lb/d
At a 1 mg/L limit load = 14.2 lb/d
At a 0.5 mg/L limit load = 7.1 lb/d
At a 2 mg/L limit load = 41.7 lb/d
At a 1 mg/L limit load = 20.8 lb/d
At a 0.5 mg/L limit load = 10.4 lb/d
TN
Permitted load = monitor
Average summer load = 53.8 lb/d
Average ar}nual load = 54.8 lb/d
At a 6 mg/L limit load = 85.0 lb/d
At a 4 mg/L limit load = 56.7 lb/d
At a 2 mg/L limit load = 28.3 lb/d
At a 1 mg/L limit load = 14.2 lb/d
(assuming Qw = 1.7 MGD)
(assuming Qw = 1.7 MGD)
(assuming Qw = 1.7 MGD)
(assuming Qw = 2.5 MGD)
(assuming Qw = 2.5 MGD)
(assuming Qw = 2.5 MGD)
(assuming Qw = 1.7 MGD)
(assuming Qw = 1.7 MGD)
(assuming Qw = 1.7 MGD)
(assuming Qw = 1.7 MGD)
At a 6 mg/L limit load = 125.1 lb/d (assuming Qw = 2.5 MGD)
At a 4 mg/L limit load = 83.4 lb/d (assuming Qw = 2.5 MGD)
At a 2 mg/L limit load = 41.7 lb/d (assuming Qw = 2.5 MGD)
At a 1 mg/L limit load = 20.8 lb/d (assuming Qw = 2.5 MGD)
Flow
Permitted flow = 1.7 MGD
Average summer flow ('96) = 1.523 MGD
Average annual flow ('96) = 1.404 MGD

TP Concentration (mg/L)
2.5
1.5
0.5
0
17-Mar-95 11-Apr-95 6-May-95 31-May-95 25-Jun-95 20-Jul-95 14-Aug-95 8-Sep-95 3-Oct-95 28-Oct-95
Date
Morehead City WWTP Qw = 1.7 MGD
Calico Creek "SC"
Instream Total Phosphorus Concentration
April '95 - October '95
•
•
♦
•
♦
•
•
♦ up TP
dwn TP

TN Concentration (mg/L)
16
14
12
10
0
17-Mar-95 11-Apr-95 6-May-95 31-May-95 25-Jun-95 20-Jul-95 14-Aug-95 8-Sep-95 3-Oct-95 28-Oct-95
Date
Morehead City WWTP Qw - 1.7 MGD
Calico Creek "SC"
Instream Total Nitrogen Concentration
April '95 - October '95
♦
•
•
•
•
•
•
♦
•
•
•
• up TN
dwn TN

Chlor-a Concentration (ug/L)
260
240
220
200
180
160
140
120
100
80
60
40
20
0
Morehead City WWTP Qw = 1.7 MGD
Calico Creek "SC"
Instream Chlor-a Concentration
April '95 - October '95
•
•
♦ k
•
•
•
♦ up chlor-a
N dwn chlor-a
17-Mar-95 11-Apr-95 6-May-95 31-May-95 25-Jun-95 20-Jul-95 14-Aug-95 8-Sep-95 3-Oct-95 28-Oct-95
Date

DO Concentration (mg/L)
Morehead City WWTP Qw = 1.7 MGD
Calico Creek "SC"
Instream Dissolved Oxygen Concentration
April 1995 - June 1997
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
1-Jan-95 11-Apr-95 20-Jul-95 28-Oct-95 5-Feb-96 15-May-96 23-Aug-96 1-Dec-96 11-Mar-97 19-Jun-97 27-Sep-97
Date
♦
M
♦_♦
,..�
-,
•
♦ ♦
C,
♦ ♦
♦
+♦♦ 44 - 14 • ♦
•
••
•
`�
♦__: �• .-♦
•
,..♦
•. i•-
♦.
•
♦
•-♦
♦up DO
■ dwn DO

Morehead City WWTP and Surrounding Waters
Newport River
Morehead City WWTP `^
Qw=1.7 MGD
Calico Ck. "SC"
BBAUFO TP
Legend
• Minor Dischg(<1MGD1
• Major Duchg (> 1MGDl
Al Non SA waters
NSA waters
Primary Road
,_. Municipality
PZE
Closed Shell Fish water:.
(area approximated)
DEHNR
4jqust 19,

Page 1
Note
for Dave Goodrich
From: Stev Tedder
Date: Fri, Oct 31, 1997 2:45 PM
Subject: RE: Calico Creek
To: Da7 Goodrich; Don Safrit
JUST AN FYI
Fro ' : Steve Tedder on Mon, Aug 18, 1997 7:08 AM
Subject: RE: Calico Creek
To: Preston Howard
FYI
INFO ON THE N&P FOR MOREHEAD CITY
From: Steve Tedder on Mon, Aug 11, 1997 11:11 AM
Subject: RE: Calico Creek
To: Larry Ausley
IT WILL BE AN EXPENSIVE PROPOSITION, SO THE BETTER OUR DATA, THE
LESS ROOM FOR ARGUMENT.
From: Larry Ausley on Mon, Aug 11, 1997 11:00 AM
Subject: RE: Calico Creek
To: teve Tedder
Cc: Jimmie Overton; Karen Lynch; Ruth Swanek
Givn that the available facility data indicats a large number of samples over the chlorophyll
standard with several over 100µg/L during the summer, and concurrent extremely elevated
(ancsupersaturated) daytime DOs, it is reasonable to assume that nighttime DOs are being
drivien below the standard by phytoplankton. Past studies (1989) done by ISG in support of
DEM modelling support that early AM DO deficits occur. So, I would say that yes,
phy oplankton is a problem in this situation and that nutrient reductions would have a
ben ficial effect. I do not have the information at this time to estimate what reductions in
nutrients would be necessary to meet meet the DO standard but could collaborate phyto,
modellers, ISG and possibly get some AGPT data to begin a process to at least provide some
coneext to that question. Please advise.
From: Steve Tedder on Mon, Aug 11, 1997 10:36 AM
Subject: RE: Calico Creek
To: any Ausley
MY QUESTION IS, DO WE HAVE ALGAL PROBLEMS THERE OR NOT. THE
CHLOROPHYLL STANDARD IS AN INDICATOR, I WANT A POSITION FROM ESB
ON THIS ASPECT OF THE INSTREAM CONCERNS. I AM OK WITH THE DO
PROBLEMS AND COLIFORM. BUT I'M NOT AS SOLD ON THE REAL PEOBLEMS
WITH NUTRIENTS YET. I WANT YOUR OPINIONS.
From: Larry Ausley on Mon, Aug 11, 1997 10:01 AM
Subject: Calico Creek
To: Steve Tedder
Cc: Andy McDaniel; Coleen Sullins; Dave Goodrich; Don Safrit; Jimmie Overton; Karen

Page 2
Lynch; Ruth Swanek
Re your question about phyto population:
A single phyto sample is on record from Calico in 1994. Corresponding with a chlorophyll
of 11 µg/L, the sample was dominated by a tolerant diatom. The closest ambient WQ station
to that is in the Newport River across from the mouth of Calico Creek. Data summaries there
do not indicate DO problems, nor very elevated N or P values.

•
Morehead City WWTP
NC0026611
Qw=1.7 MGD
Calico Creek "SC"
AHM
8/8/97
• Morehead City WWTP has a permit to discharge 1.7 MGD into Calico Creek, a class SC stream that
flows east into the Newport River near the Beaufort Inlet.
• The current permit limits for conventional parameters are as follows:
Monthly Average
Summer Winter
Wasteflow (MGD): 1.7 1.7
BOD5 (mg/1): 20.0 30.0
NH3N (mg/1): monitor monitor
DO (mg/1): 5.0 5.0
TSS (mg/1): 30.0 30.0
Fecal Col. (/100 ml): 86.0 86.0
pH (SU): 6.8-8.5 6.8-8.5
Residual Chlorine (pg/1): monitor monitor
Temperature (C): monitor monitor
TP (mg/1): monitor monitor
TN (mg/1): monitor monitor
Acute Toxicity P/F Qtrly
• Water quality violations of the state standard for dissolved oxygen and chlorophyll -a have been
occurring in Calico Creek for many years (see attached graphs). These problems have been
exacerbated by the fact that Calico Creek is poorly flushing and tidally influenced.
• Nutrients as well as oxygen consuming wastes are believed to be significant contributors to the
impairment of Calico Creek.
• Dye studies indicate that the effluent remains in the vicinity of the discharge for at least one complete
tidal chicle.
• The City is severelylimited in choices for alternative sites for a surface water discharge as most of the
,Y g
major water ways surrounding the city are classified SA. The SA waters at the confluence of Calico
Creek and the Newport River are currently closed to shell fishing.
• A modeling analysis of Calico Creek was completed in 1990. Based on the modeling report removal
of the discharge was recommended in the White Oak Basinwide Plan. The report indicates that if
removal of the discharge is not an option then the facility should be required to meet advanced tertiary
limits including nutrient removal for nitrogen and phosphorus.

Loading Summary for Oxygen Consuming Wastes and Nutrients
Morehead City WWTP/Calico Creek "SC"
BODS
Permitted load = 284 lb/d
Average summer load ('96) = 127 lb/d
Average annual load ('96) = 123 lb/d
Current limit: 20 mg/L (S) / 30 mg/L (W)
At a 5 mg/L
At a 5 mg/L
limit load = 71 lb/d (assuming Qw = 1.7 MGD)
limit load = 104.2 lb/d (assuming Qw = 2.5 MGD)
Ammonia
Permitted 1cad = monitor
Average summer load = 11.3 lb/d
Average aniival load = 10.8 Ib/d
No limit in current permit
At a 2 mg/L limit load = 28.3 lb/d (assuming Qw = 1.7 MGD)
At a 1 mg/L limit load = 14.2 lb/d (assuming Qw = 1.7 MGD)
At a 2 mg/L limit load = 41.7 lb/d (assuming Qw = 2.5 MGD)
At a 1 mg/L limit load = 20.8 lb/d (assuming Qw = 2.5 MGD)
TP
Permitted load = monitor
Average summer load ('96) = 22.O lb/d
Average a+ual load ('96) = 16.9 lb/d
At a 2 mg/L limit load = 28.4 lb/d (assuming Qw = 1.7 MGD)
At a 1 mg/L limit load = 14.2 lb/d (assuming Qw = 1.7 MGD)
At a 0.5 mg/L limit load = 7.1 lb/d (assuming Qw = 1.7 MGD)
At a 2 mg/I. limit load = 41.7 lb/d (assuming Qw = 2.5 MGD)
At a 1 mg/1r limit load = 20.8 lb/d (assuming Qw = 2.5 MGD)
At a 0.5 mg/L limit load = 10.4 lb/d (assuming Qw = 2.5 MGD)
TN
Permitted load = monitor
Average s comer load ('96) = 53.8 lb/d
Average a nual load ('96) = 54.8 lb/d
At a 6 mg/L limit load = 85.0 lb/d (assuming Qw = 1.7 MGD)
At a 4 mg/L limit load = 56.7 lb/d (assuming Qw = 1.7 MGD)
At a 2 mg/L limit load = 28.3 lb/d (assuming Qw = 1.7 MGD)
At a 1 mg/L limit load = 14.2 lb/d (assuming Qw = 1.7 MGD)
At a 6 mg/L limit load = 125.1 lb/d (assuming Qw = 2.5 MGD)
At a 4 mg/L limit load = 83.4 lb/d (assuming Qw = 2.5 MGD)
At a 2 mg/L limit load = 41.7 lb/d (assuming Qw = 2.5 MGD)
At a 1 mg/L limit load = 20.8 lb/d (assuming Qw = 2.5 MGD)
Flow
Permitted flow = 1.7 MGD
Average summer flow ('96) = 1.523 MGD
Average annual flow ('96) = 1.404 MGD

DO Concentration (mg/L)
15
14
13
12
11
10
9
8
7
6
5
4
3
2
Morehead City WWTP Ow = 1.7 MGD
Calico Creek "SC"
Instream Dissolved Oxygen Concentration
April 1995 - June 1997
•
.* *
A IN u ♦
6
V•Eat : ea
igg
• •
•
• •♦• •
♦ 12
•
• .♦ +
•
• •� . 1♦
♦• •
ill • 911
•
♦
0
1-Jan-95 11-Apr-95 20-Jul-95 28-Oct-95 5-Feb-96 15-May-96 23-Aug-96 1-Dec-96 11-Mar-97 19-Jun-97 27-Sep-97
Date
♦ up DO
■ dwn DO

260
240
220
200
a)
= 160
0
180
.171
140
a)
c 120
0
U
100
L
0
U 80
60
40
20
Morehead City WWTP Qw = 1.7 MGD
Calico Creek "SC"
Instream Chlor-a Concentration
April '95 - October '95
0
17-Mar-95
0
♦
■
11-Apr-95
♦ up chlor-a
dwn chlor-a
6-May-95 31-May-95 25-Jun-95 20-Jul-95 14-Aug-95 8-Sep-95 3-Oct-95 28-Oct-95
Date

TP Concentration (mg/L)
2.5
1.5
0.5
0
17-Mar-95 11-Apr-95 6-May-95 31-May-95 25-Jun-95 20-Jul-95 14-Aug-95 8-Sep-95 3-Oct-95 28-Oct-95
Date
Morehead City WWTP Ow = 1.7 MGD
Calico Creek "SC"
Instream Total Phosphorus Concentration
April '95 - October '95
•
•
•
♦ ♦ IN ♦ ♦ --
of ■ u
ill
♦
•
•
♦ up TP
■ dwn TP

TN Concentration (mg/L)
16
14
12
10
8
6
4
2
0
Morehead City WWTP Qw = 1.7 MGD
Calico Creek "SC"
Instream Total Nitrogen Concentration
April '95 - October '95
•
♦
•
■
•
•
•
•
•
♦
•
♦'
•
of
•
•
■
♦up TN
■ dwn TN
17-Mar-95 11-Apr-95 6-May-95 31-May-95 25-Jun-95 20-JuI-95 14-Aug-95 8-Sep-95 3-Oct-95 28-Oct-95
Date

Morehead City WWTP and
Surrounding Waters
Newport River
Morehead City WWTP ^
Qw=1.7 MGD �.
Calico Ck. "SC"
Legend
• Minor Dischg l<1MGD1
• Major Dischg 1> 1MGD1
,A / Non SA waters
/ �/ SA waters
Pnmary Road
Municipality
Q Closed Shell Fish waters
(area approximated(
DEHNRAVA

Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requester:
Date of Request:
Topo Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
Morehead City WWTP
NC0026611
Domestic - 100%
Existing
Renewal
Calico Creek
Sc
03-05-03
Carteret
Wilmington
Mark McIntire
10/23/96
I 32 NW
FE@METZEr
DEC 041996cz,
Request # 8521
Stream Characteristic:
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs): Tidal
Winter 7Q10 (cfs):
Average Flow (cfs):
30Q2 (cfs):
IWC (%):
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Morehead City is renewing its permit to discharge 1.7 MGD of treated domestic wastewater
into Calico Creek. Calico Creek is a poorly flushing, tidally influenced, class SC stream. Dye
studies indicate that the effluent remains in the vicinity of the discharge for at least one complete
tidal cycle. As a result, in part, to poor flushing, the creek has experienced severe water quality
problems. Substandard DO concentrations are routine occurrences during the summer months. Of
the 96 DO measurements taken this past summer (June -Sept 1996), 57% of the measurements
were below the standard of 5 mg/L. Numerous DO readings below 3 mg/L have been reported
over the past two summers including measurements as low as 0.9 mg/L.
Nutrient related water quality problems have also been documented in Calico Creek. In
1995 the facility sampled for chlorophyll -a instream and reported many violations including a
measurement in excess of 200 ug/L.
A report based on a modeling analysis of Calico Creek was completed in 1990. This report
concluded that removal of the discharge would result in the greatest benefit to the creek.
Considering the fact that poor water conditions have persisted in the creek since 1990, removal of
the discharge continues to be the recommended management strategy. The modeling analysis also
indicates that if removal of the discharge is not an option then the facility should be required to
meet advanced tertiary limits including nutrient removal for nitrogen and phosphorus.
C eret, Craven, Onslow, and Pamlico Counties have formed a regional wastewater task
force to det rmine the feasibility for regional wastewater treatment in the four county area. In
August 1996 the second of three memoranda was submitted to the Division for review. This
second technical report outlined six possible long term management strategies for wastewater
treatment in area. Since Morehead City is included in this planning endeavor, the Instream
Assessment Unit (IAU) recommends that the City's current limits be reissued for this permit
renewal.

2
Regional Supervisor:
Permits & Engineering:
This recommendation is based on the premise that an environmentally sound management
plan to regionalize wastewater treatment will be identified for the four coastal counties. The
recommendation of renewing the existing permit is an attempt to reserve the City's resources for
the implementation of such a plan.
In the interim the IAU does not support any expansions of the Morehead City WWTP until
a regional plan has been adapted. If removal of the discharge to Calico Creek is determined to be
not feasible then advanced tertiary limits with nutrient removal would be recommended for a
discharge of 1.7 MGD or greater.
Special Schedule Requirements and additional comments from Reviewers:
SEE -rACHEn - UJ ko
Recommended by:
Reviewed by
Instream Assessment:
L------
RETURN TO TECHNICAL SUPPORT BY: l 21100 (>i
(i / 7 C4 A15t-
1 du/ //eyt/ mil(/se/F
/ i4
da,./4„/.2/,/,
fii„
,_/r lC/ Date: // /0/:
Date:
Date: JZ-2.4>-
Date:
L /
III &Oirt-fice :l
r'14/1)2 . 14/i/ �� Iv As p 14// -� a 2

3
Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (14/1):
Temperature (C):
TP (mg/1):
TN (mg/1):
Acute Toxicity P/F Qtrly
Recommended Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (nil):
Temperature (C):
TP (mg/1):
TN (mg/1):
Acute Toxicity P/F Qtrly
CONVENTIONAL PARAMETERS
Monthly Average
Summer Winter
1.7 1.7
20.0 30.0
monitor monitor
5.0 5.0
30.0 30.0
86.0 86.0
6.8-8.5 6.8-8.5
monitor monitor
monitor monitor
monitor monitor
monitor monitor
Monthly Average
Summer Winter
1.7 1.7
20.0 30.0
monitor monitor
5.0 5.0
30.0 30.0
86.0 86.0 Or
6.8-8.5 6.8-8.5
monitor monitor
monitor monitor
monitor monitor
monitor monitor
Limit Changes due to:
Even though significant water quality problems have been documented in Calico Creek, no
limit changes are recommended at this time in order to allow the City to reserve its resources for
implementing a region wastewater treatment strategy. Stricter limits in the permit now could
comprise future efforts to regionalize or remove the discharge. If it is determined that a continued
discharge to Calico Creek is necessary then advanced tertiary limits with nutrient removal will be
recommended.
Parameter(s) are water quality limited. For some parameters, the available load capacity of
the immediate receiving water will be consumed. This may affect future water quality based
effluent limitations for additional dischargers within this portion of the watershed.
OR
No parameters are water quality limited, but this discharge may affect future allocations.
FeecLO CD(A.-6Yrpt L,t. tt(I4 (Ya a) LGtla) b vt o icl to lA CO) -f prb-U OI c191,04ai
.5f1 .L tilt1)- ,61.1)Yl 1.1qA -to; II ku
yhtuI 400 r P.

4
INSTREAM MONITORING REQUIREMENTS
Upstream Location: at the first bridge crossing upstream of the outfall
Downstream Location: at Piggotts St. bridge
Parameters: DO, fecal, temp, conductivity,salinity, chlorophyll -a, TP, TN
Special instream monitoring locations or monitoring frequencies:
DO, fecal, temp,salinity, and conductivity should be collected three times per week during June, July,
August, and September and once per week during the remaining months of the year. Chlorophyll -a, TP
TN samples should be collected once per week year round.
MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS
Adequacy of Existing Treatment
Has the facility demonstrated the ability to meet the proposed new limits with existing treatment
facilities? Yes No
If no, which parameters cannot be met?
Would a "phasing in" of the new limits be appropriate? Yes No
If yes, please provide a schedule (and basis for that schedule) with the regional
office recommendations:
If no, why not?
Special Instructions or Conditions
Wasteload sent to EPA? (Major) (Y or N)
(If yes, then attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old
assumptions that were made, and description of how it fits into basinwide plan)
Additional Tnformation attached?
(Y or N) If yes, explain with attachments.

Facility Name ford iletz
W rrP Permit # /1(200%.6t,1/ Pipe # CO
ACUTE TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the North Carolina
Procedure Document entitled "Pass/Fail Methodology For Determining Acute Toxicity In A Single Effluent
Concentration." The monitoring shall be performed as a Mysidopsis bahia 24 hour static test, using effluent
collected as a 24 hour composite. The effluent concentration at which there may be at no time significant acute
mortality is 90% (defined as treatment two in the North Carolina procedure document). Effluent samples for self -
monitoring purposes must be obtained during representative effluent discharge below all waste treatment. The
first test will be performed after thirty days from the effective date of this permit during the months of
Fe b1 ' 7cui fi p j /(/a V'
All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge
Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGE3E.
Additionally, DEM Form AT-2 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Environmental Management
4401 Reedy Creek Road
Raleigh, N.C. 27607
Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in
association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity
sample must be measured and reported if chlorine is employed for disinfection of the waste stream.
Should any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will
begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will
revert to quarterly in the months specified above.
Should any test data from either these monitoring requirements or tests performed by the North Carolina Division
of Environmental Management indicate potential impacts to the receiving stream, this permit may be re -opened and
modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism
survival and appropriate environmental controls, shall constitute an invalid test and will require immediate
retesting(within 30 days of initial monitoring event). Failure to submit suitable test results will constitute
noncompliance with monitoring requirements.
7Q10 / / ricc / cfs
Permitted Flow 1.7 MGD
IWC
Basin & Sub -basin %10k03
Receiving Stream e /, c o Cre..t42i
County e.A i.YP
Recommended by:
Date I//5,94
QAL PIF Mysid 24 Version 9/91

December 18, 1996
Subject: Morohead City WWTP Waste Load Allocation
Permit Number: NC0026611
From: Ken Eagleson, WMRO
To: Reviewers
The Wilmington Regional Office feels that further consideration should be given to the
constriction df this permit. This WWTP is associated with water quality problems including low
dissolved oxygen concentrations and nutrient related chlorophyll -a standard violations. The WLA
recommends that no limit changes be required at this time due to regionalization potentials being
developed within a four county area inclusive of Carteret. The schedule for beginning
construction of a regional facility is four or five years away (optimistically). Completion of the
regionalization project will take 10-15 years.
Due to the long time period before a solution to the water quality issues in Calico Creek are
available, this office believes that further consideration should be given to advanced tertiary limits
with nutrient removal. These requirements should be considered with the recognition that
treatment improvements made now, will have immediate benefits to water quality but also be
beneficial to the City when the regional waste discharge is available. Several of the preferred
alternatives within the Feasibility Study include the entry of treated wastewater into the regional
discharge system, without being processed through the regional wastewater facility. In this case,
an investment ;made now will have both immediate benefits and benefits when the regional system
becomes active.

From:
Organization:
To:
Date:
Subject:
Reply -to:
Priority
"Steve Tedder" <[e-mail]> 4
DEM Water Quality
[e-mail]
Wed, 11 Dec 1996 16:58:54 EST
Re: Morehead/ Calico Creek
[e-mail]
normal
ken has somve valid concerns.
respond to him?
From:
Organization:
To:
Date:
Subject:
Priority
want to give me your thoughts before i
"Ken Eagleson" <[e-mail]>
WiRO DEHNR
[e-mail]
Wed, 11 Dec 1996 13:34:47 +1100
Morehead/ Calico Creek
normal
My staff down here feel that the Morehead Plant needs to upgrade. We
have been asked to comment on a WLA. The issue is that the Regional
Task Force is persuing an Ocean Outfall and estimate very
optimistically that in 4 years they might begin construction. In all
probability, I think it will be significantly longer. The WLA says
to keep limits the same, not requiring the expenditure of money.
This money could be used toward the regionalization efforts.
Staff (including Shiver) here want to require more restrictive limits
now, as they feel that water quality is bad enough to require this and
that the
regionalization is far enough in the future that we should proceed
with more restictive limits anyway. I was wondering if there was an
official position already taken by you or Preston that I need to
march to. Let me know. Ken.

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Wat-- Quail • --c on
Attentio :Mark McIntire (review Engineer)
Date: 12/2/96
NPDES STAFF REPORT AND RECOMMENDATION
County: Carteret �.�
Permit No. NC0026611 '`!-�
PART I - GENERAL INFORMATION pEC 0 6 1996
1. Facility and Address: Town of Morehead City WWTP WATER GtUALIPi E ''"S
706 Arendell Street
P.O. Drawer M
Morehead City, NC 28557
2. Date of Investigation: 11/13/96
3. Report Prepared by: Steve West
4. Person Contacted and Telephone Number:
Roy Lautenschleger, ORC [phone]
5. Directions to Site: From Arendell Street in Morehead City,
travel north on Crab Point Road (NCSR 1176) across Calico
Street. Turn left on Loop Road (NCSR 1179) and travel
approximately 0.5 mile and turn left on Treatment Plant Road.
The plant is located at the end of this road.
6. Discharge Point:
Latitude: 34° 43' 53" Longitude: 76° 44' 11"
USGS Quad No: I 32 NW USGS Quad Name: Beaufort
7. Site size and expansion area consistent with application?
N/A
8. Topography: The site slopes gently toward Calico Creek and is
approximately 8 feet above msl.
9. Location of nearest dwelling: An apartment complex is located
within 500 feet of the facility.
10. Receiving stream or affected surface waters: Calico Creek
a. Classification: Class "SC" waters
b. River Basin and Subbasin No.: 030503
c. Describe receiving stream features and pertinent
downstream uses: Tidal creek tributary to class
"SA" waters approximately 1.5 miles downstream.

PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 1.7 MGD
b. What is the current permitted flow limit? 1.7 MGD
c. Actual treatment capacity of the current facility:
2.5 MGD
d.
e.
f.
g•
Date and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: None.
Please provide a description of existing wastewater
treatment facilities: The existing facilities consist of
two influent pump stations with bar screens, aerated
mechanical grit removal, splitter box, dual 1.7 MGD
treatment trains with primary clarifiers, trickling
filters (one synthetic media and one rock media), and
secondary clarifiers, flow is combined to two chlorine
contact chambers in series with one feed point, post
aeration, two 180,000 gallon aerated sludge digestors, 10
gravity sand drying beds, sludge storage building, and a
75 KW standby generator (which can power the clarifiers,
chlorine feed and sludge pumps).
Please provide a description of proposed wastewater
treatment facilities: The facility will have to be
upgraded to meet tertiary limits and will likely include
an extended aeration plant with tertiary filters.
Possible toxic impacts to surface waters: Chlorine
h. Pretreatment Program: Not needed.
2. Residuals handling and utilization/disposal scheme:
Residuals are dried and disposed of per Permit No. WQ0006018
and stored as needed in an on -site storage building.
3. Treatment plant classification: Class III
4. SIC Code: Primary - 4952
Wastewater Code Primary: 01 Secondary: N/A
Main Treatment Unit Code: 051X3
PART III
- OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies involved? No
2. Special monitoring or limitations requests: None

3. Important SOC, JOC or Compliance Schedule dates:
Date: N/A
Subm.ssion of Plans and Specifications: N/A
Begin Construction: N/A
Complete Construction: N/A
4. Alternative Analysis Evaluation: See Part IV
5. Other Special Items: None
PART IV
EVALUATION AND RECOMMENDATIONS
The plant appears to be achieving treatment in accordance with its
design and is meeting current permit limits. An extensive
collection system slip -lining project has reduced I&I
significantly.
However, the White Oak River Basinwide Plan document has indicated
that Calico Creek has been adversely impacted by this discharge.
The creek' "..has experienced excessive algal growth, elevated
nutrient levels, and low dissolved oxygen concentrations.." Class
"SA" waters are approximately 1.5 miles downstream of the discharge
point. Removal of the discharge is likely not economically
feasible at this time, although a feasibility analysis has not been
performed, as it was not requested either in the existing permit or
the renewal application. It is recommended that a requirement to
perform any economic feasibility analysis to remove the discharge be
placed in the new permit. It is recommended that a schedule to
upgrade the plant to meet tertiary limits and remove nutrients be
devised in the interim (Calico Creek does not have a "NSW"
designation so it is not clear whether nutrient limits could be
applied in this permit); with the associated stricter limits place
in the permit to be effective upon completion of the plant
improvements. An SOC seems to be the most reasonable way to phase
in this type of project.
The Town does not currently have any plans in place to improve the
plant or eliminate the discharge, although the Town is expecting
tighter limits and a schedule to meet theses limits. The Town is
asking to increase its flow limit to 2.5 MGD, the current treatment
capacity, but it does not appear that the basinwide plan would
allow any increase above 1.7 MGD.

It is recommended that upon resolution for submission of a the
above schedule a draft permit be prepared and placed at public
notice. f no significant adverse public comment is received, it
is recommended NPDES Permit No. NC0026611 be reissued to the Town
of Morehead City in accordance with the basin -wide permitting
strategy.
Sign.ture of 'OArt preparer
a' er
Regional Supervisor
cc: Technical Support Branch
Wilmington Regional Office Files
Central Files
Date

3846888M 'N.
Co of
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Golf is" -Course
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•
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Morehead City
Permit No. NC0026611
Discharge Point:
3845 Latitude: 34° 43' 53"
Longitude: 76° 44 ' 11"
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• RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
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New Facility Existing Facility
Per. No.WQ Health Dept.Per No.
- J i'.S Telephone: '1iO Sc)S-35O0 Date: )t-
Name of Facility: TotAIA 0 I=
Owner or Contact Person: Z0-e
Mailing Address: PO Ore tamerCounty:
County: c. t
Present Classification:
NPDES Per. No. NCO()2. 6 6 11 Nondisc.
Rated by:
Reviewed by:
ORC: Rt.1 LaA1420.50Atejete
Check Classification(s): Subsurface
Wastewater Classification: (Circle One) I 11
Health Dept.
Regional Office
Central Office
Grade:
• Sp - irrigation
Iv
Telephone:
Telephone:
Telephone:
Telephone:
Land Application
Total Points: . 1
jN.PLANT PROCESSES AND RELATED CONTROL EQUIPMENT WHiCH ARE AN INTEGRAL PART OF INDUSTRIAL PRODUCTION SHALL NOT BE
CONSIDERED WASTE TRFLATMENT FOR THE PURPOSE OF CLASSIFICATION. ALSO SEPTIC TANK SYSTEMS CONSISTING ONLY OF SEPTiCJAW
AND GRAVITY NrrRIFICATlON LINES ARE EXEMPT FROM CLASSIFICATION,
SUBSURFACE CLASSIFICATiON
(check all units that apply)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand filters
5. grease trap/interceptor
6. oil/water separators
7. gravity subsurface treatment and disposal:
8. pressure sub!urface treatment and disposal:
SPRAY IRRIGATION CLASSIFICATION
(check all units that apply)
1. pretiminary treatment (definition no. 32 )
2. lagoons
3. septic tanks
4. pump tanks
5. pumps
6,._sand filters
7. grease trap/interceptor
8. oil/water separators
9. disinfection
10. chemical addition for nutrient/algae control
11. spray irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater in excess of these components shall
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACIUTY CLASSIFICATION
The following systems shall be assigned a Class I classification, unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case -by -case basis: (Check if Appropriate)
1. Oil/water Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tank/Sand Filter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, disinfection
and direct discharge;
3. Lagoon Syste s consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutri nt control, and direct discharge;
4. Closed -loop Recycle Systems;
5. Groundwater Remediation Systems consisting only of oil/water separators, pumps, air -stripping, carbon adsorption, disinfection
and disposal;
6. Aquaculture operations with discharge to surface waters;
7. .Water Plant sludge handling and back -wash water treatment;
8. Seafood processing consisting of screening and disposal.
9. Singte-family ischarging systems, with the exception of Aerobic Treatment Units, will be dassified if permitted after July 1,
1993 or if upo inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, in writing.

The following scale is used for rating wastewater treatment facilities: (circle appropriate points)
}
(3)
(4)
(5)
(6)
50.001 - 100,000
100,001 - 250.000 4 - 1.7 ,144.
250,001 - 500,000 - 5
500,001 - 1,000,000 a
1.000.001 - 2.000.000 -1 0
2.000,001 (and up) rate 1 int additional for each 200.000 gpd capacity up to a maximum of 3u
Design Flow (gpd) 2 5i . O©
PRELIMINARY UNITS/PROCESSES ( detttnitt n No.32)
(a) Bar Screens
or
(b) Mechanical Screens, Static Screens or Comminuting Devices 2
(c) Grit Removal 1
or
(d) Mediantcal or Aerated Grit Removal .2
(e) Flow Measuring Device 1
or
(f) instrumented Flow MeasurementC2
(g) Preaeratlon
(h) Influent Flow Equalization 2
(I) Grease or 011 Separators - Gravity 2
Mechanical 3
Dissolved Air Flotation .8
()) Prechlorination .5
PRIMARY TREATMENT UNITS/PROCESSES
(a) Septic Tank (see definition No. 43) 2
(b) Imhoff Tank
(c) Primary Clarifiers5`
(d) Settling Ponds or Settling Tanks for inorganic Non -toxic Materials (sludge handling facilities for water
purification plants. sand. gravel. stone. and other mining operations except recreational activities such as gem
or gold mining) 2
SECONDARYTREATMENT UNITS/PROCESSES
(a) Carbonaceous Stage
(I) Aeration -High Purity Oxygen System .20
Diffused Air System 10
MechanicalAir System (fixed. floating or rotor).................................................................8
Separate Sludge Reaeration. .3
(II) Trickling Filter
High Rate ( 7
Standard Rate
Packed Tower .5
(ill) Biological Aerated Filter or Aerated Biological Fitter 10
(iv) Aerated Lagoons 10
(v) Rotating Biological Contactors 10
(v1) Sand Filters -intermittent biological 2
Recirculating biological 3
(vil) Stabilization Lagoons
(vlli) Clarifier
(ix) Single stage system for combined carbonaceous removal of BOD and nitrogenous removal b
nitrification (see definition No. 12)(Points for this item have to be in addition to items
(5)(a)(I) through (5)(a)(viil).
utilizing the extended aeration process (see definition No.3a) .2
utilizing other than the extended aeration process. 8
(x) Nutrient additions to enhance BOD removal 5
(xi) Biological Culture ("Super Bugs')addfion 5
(b) Nitrogenous Stage
(I) Aeration - High Purity Oxygen System .20
Diffused Air System 10
Mechanical Air System (fixed, floating or rotor) .8
Separate Sludge Reaeration 3
(ti) Trickling Filter -High Rate 7
Standard Rate 5
Packed Tower 5
(IIi) Biological Aerated Fitter or Aerated Biological Filter 10
(iv) Rotating Biological Contactors 10
(v) Sand Filter - intermittent biological 2
Recirculating biological 3
(v1) Clarifier 5
TERTIARY OR ADVANCED TREATMENT UNITS/PROCESSES
(a) Activated Carbon Beds -
without carbon regeneration .5
with carbon regeneration 15
(b) Powdered or Granular Activated Carbon Feed -
without carbon regeneration .5
with carbon regeneration 15
(c) Air stripping .5
(d) Denitrtficatlon Process 10
Co) Electrodialysis .5
(f) Foam Separation .5
(g) Ion Exchange .5
(h) Land Application of Treated Effluent (see definition No. 22b) (not applicable for sand, gravel. stone
and other similar mining operations) by high rate infiltration 4
(I) Microscreens 5
()) Phosphorous Removal by Blotogtcal Processes (See definition No. 26) 20
(k) Polishing Ponds - without aeration 2
with aeration .5
ITEM POINTS
Industrial Pretreatment units or Industrial Pretreatment Program (see deflnitlon No. 33) 4
DESIGN FLOW OF PLANT IN gpd [not applicable to non -contaminated cooling waters, sludge handling facilities for
water purification plants, totally closed cycle systems(see definition No. 11), and facilities consisting only of item
(4)(d) or Items (4)(d) and (11)(d)]
0 - 20,000 1
20,001 - 50,000 2
.3 pERthii �,iMl

2
( ) (c)Dedicated Landfill(burial) by the permittee of the wastewater treatment facility .5
9
(a) Chlorination
(b) Dechiorination
(c) Ozone
(d) Radiation 5
(10) CHEMICAL ADDITION SYSTEMS see definition No. 9)(not 5
SYSTEM(S) ( applicable to chemical additions rated as Item (3)(J),
(5j(a)(xi), (6)(a). (6)(b). (7)(b), (7)(e). (9a), (9)(b) or (9)(c) 5 points each:
List
(I) Post Aeration - cascade
diffused or mechanical .2
(m) Reverse Osmosis)
(n) Sand or Mixed -Media Filters - low rate 2
high rate 6
(o) Treatment processes for removal of metal or cyanide 15
(p) treatment processes for removal of toxic materials other than metal or cyanide 15
(7) SLUDGE TREATMENT
(a) • Sludge Digestion Tank - Heated (anaerobic)
Aerobic
Unheated (anaerobic) 0
(b) Sludge Stabilization (chemical or thermal)
(c) Sludge Drying Beds - Gravity 23
Vacuum Assisted
(d) Sludge Elutrlation
(e) Sludge Conditioner (chemical or thermal) .5
(f). Sludge Thickener (gravity) .5
(9) Dissolved Air Flotation Unit [not applicable to a unit rated as (3)(1)] 8
(h) Sludge Gas Utilization (including gas storage) 2
(i) Sludge Holding Tank - Aerated 5
Non -aerated 2
(j) Sludge Incinerator (not including activated carbon regeneration) 10
(k) Vacuum Fitter. Centrifuge. or Filter Press or other similar dewatering devices i 0
(8) RESIDUALS UTILIZATION/DISPOSAL (including incinerated ash)
(a) Lagoons 2
(b) Land Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who holds the land application permit
or landfill permit
(11) MISCEU.ANEOUS UNITS/PROCESSES
(a) Holding Ponds. Holding Tanks or Settling Ponds for Organic or Toxic Materials including wastes from mining
operations containing nitrogen or phosphorus compounds in amounts significantly greater than is common
for domestic wastewater 4
(b) Effluent Flow Equalization (not applicable to storage basins which are inherent in land application systems) .2
(c) Stage Discharge (not applicable to storage basins inherent In land application systems)
(d) Pumps
(e) Stand -By Power Supply
(f) Thermal Pollution Control Device
TOTAL POINTS
CLASSIFICATION
Class I 5-25 Points
Class iI 26-50 Points
Class ill 51-65 Points
Class IV 66-Up Points
Facilities having a rating of one through four points, Inclusive, do not require a certified operator.
Facilities having an activated sludge process will be assigned a minimum classification of Class Ii.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class II.
Facilities having treatment professes for the biological removal of phosphorus will be assigned a minimum classification of Class ill.
.0004 DEFINITIONS
The following definitions shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A physlcaVchemical method for reducing soluble organic material from wastewater effluent; The column -type beds used in this
method will have a flow rate varying from two to eight gallons per minute per square foot and may be either upftow or downitow carbon beds. Carbon may or
may not be regenerated on the wastewater treatment plant site;
(2) Aerated Lagoons. A basin in which all solids are maintained in suspension and by which biological oxidation or organic matter is reduced through artificially
accelerated transfer of oxygen on a flow -through basis;
(3) Aeration. A process of bringing about intimate contact between air or high purity oxygen in a liquid by spraying, agitation or diffusion;(3a) Extended
Aeration. An activated sludge process -utilizing a minimum hydraulic detention time of 1B hours.
(4) Agriculturally managed site. Any site on which a crop is produced. managed. and harvested (Crop Includes grasses, grains, trees, etc.);
(5) Air Stripping. A process by which the ammonium Ion is first converted to dissolved ammonia (pH adjustment) with the ammonia then released to the
atmosphere by physical means; or other similar processes which remove petroleum products such as benzene, toluene, and xytene;
(6) Carbon Regeneration. Th regeneration of exhausted carbon by the use of a furnace to provide extremely high temperatures which volatilize and oxidize the
absorbed Impurities;
(7) Carbonaceous Stage. A stage of wastewater treatment designed to achieve .`secondary' effluent limits;
(8) Centrifuge. A mechanical aevice In which centrifugal force is used to separate solids from liquids or to separate liquids of efferent densi as;
(9) Chemical Addition Systems- The addition of chemicals) to wastewater at an application point for purposes of improving solids removal, pH adjustment,
alkalinity control. etc.; the capability to experiment with different chemicals and different application points to achieve a specific resuit will be considered one
system; the capability to add chemical(s) to dual units will be rated as one system; capability to add a chemical at a different application points for different
purposes will result In the systems being rated as separate systems;
(10) Chemical Sludge Condittorting. The addition of a chemical compound such as lime. ferric chloride, or a polymer to wet sludge to coalesce the mass prior to
its application to a dewatertngldevice;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing inorganic. non -toxic materials from sand, gravel.
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or any other appurtenances;
(12) Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrification- A single stage system required to achieve permit effluent limits on BOD
and ammonia nitrogen within the same biological reactor,
(13) Dechlorination. The partial or complete reduction of residual chlorine in a liquid by any chemical or physical process;
(14) Denttrification Process. The conversion of nitrate -nitrogen to nitrogen gas;

(15) Electrodlalysls. Process for removing ionized salts from water through the use of ion -selective Ion -exchange membranes;
(16) Filter Press. A process operated mechanically for partially dewatering sludge;
(17) Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the introduction of air In the form of fine bubbles; also called foam fractionation;
(18) Grit Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19) Imhoff Tank. A deep two story wastewater tank consisting of an upper sedimentation chamber and a Tower sludge digestion chamber.
(20) Instrumented Flow l4ieasurement. A device which indicates and records rate of flow;
(21) Ion Exchange. A chemical process in which ions from two different molecules are exchanged;
(22) Land application:
(a) Sludge Disposal A final sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface injection
(i.e., chisel plow); [not applicable for types of sludge described in (11) of this Rule];
(b) Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application of wastewater onto a land area as a
means of final disposal or treatment;
(23) Mlcroscreen. A loer speed. continuously back -washed, rotating drum filter operating under gravity conditions as a polishing method for removing
suspended solids from effluent;
(24) Nitrification Process. The blochemical conversion of unoxldlzed nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
(25) Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose et converting ammonia nitrogen to nitrate nitrogen;
(26) Phosphate Removal. Biological. The removal of phosphorus from wastewater by an oxic/anoxic process designed to enhance Luxury uptake of phosphorus
by the microorganisms;
(27) Polishing Pond. A holding pond following secondary. treatment with sufficient detention time to allow settling of finely suspended solids;
(28) Post Aeration. Aeration following conventional secondary treatment units to increase effluent D.O. or for any other purpose;
(29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen Is added to the effluent by a nonmechanical. gravity means of flowing down a
series of steps or weirs;l The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator
adjustment; thus, zero points are assigned even though this is an essential step to meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Feed. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon is feed controlled into the system;
(31) Preaeration. A tank constructed to provide aeration prior to primary treatment
(32) Preliminary Units. IJnit operations in the treatment process. such as screening and comminution. that prepare the liquor for subsequent major operations;
(33) Industrial Pretreatment.
(a) Pre-treatment Unit. Industrial. The conditioning of a waste at its source before discharge, to remove or to neutralize substances Injurious to sewers and
treatment processes or to effect a partial reduction In load on the treatment process which is operated by the same governing body as the wastewater
treatment plant being -rated;
b) Pre-treatment Program, Industrial - must be a State or EPA required program to receive points on the rating sheet;
(34) Primary Clarifiers. The first settling tanks through which wastewater Is passed In a treatment works for the purpose of removing settleable and suspended
solids and BOD which is associated with the solids;
(35) Pumps. All Influent. effluent and in -plant pumps;
(36) Radiation. Disinfection or sterilization process utilizing devices 'emitting uttravlolet or gamma rays;
(37) Reverse Osmosis. A treatment process in which a heavy contaminated liquid Is pressurized through a membrane forming nearly pure iiquld free from
suspended solids;
(38) Rotating Biological Contractors. A fixed biological growth process in which wastewater flows through tanks in which a series of partially submerged circular
surfaces are rotated;
(39) Sand Filters:
(a) Intermittent Biological. Filtration of effluent following septic tanks, lagoons. or some other treatment process In which further biodecomposhion is
expected to produce desired effluents; Hydraulic loading rates on these filters are computed in gpd/ac and have a resulting low gpm/sf (less than one);
b) Recirculating biological - the same type of sand fitter as defined in Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand filter,
(40) Sand or Mixed -Media Fitters. A polishing process by which effluent Limits are achieved through a further reduction of suspended solids;
(a) low rate — gravity, hydraulically loaded filter with loading rates in the one to three gpm/sf range;
(b) high rate — a pressure. hydraulically loaded filter with loading rates in the five gpm/sf range; At any rate. the loading rate will exceed three gpm+sf;
(41) Secondary Clarifiers. A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the
biological treatment unhs;
(42) Separate Sludge Reparation. A part of the contact stabilization process where the activated sludge is transferred to a tank and aerated before returning it
to the contact basin;
(43) Septic Tank. A single -story settling tank in which settled sludge is In contact with the wastewater flowing through the tank; shall not be applicable for
septic tank systems serving single family residences having capacity of 2.000 gallons or less which discharge to a nitrification flak;
(44) Sludge Digestion. The process by which organic or volatile matter and sludge is gasified. liquefied, mineralized or converted into more stable organic matter
through the activity of living organisms, which includes aerated holding tanks;
(45) Sludge Drying Beds. An area comprising natural or artificial layers of porous materials upon which digested sewage sludge is dried by drainage and
evaporation;
(46) Sludge Elutrlatlon. A process of sludge conditioning in which certain constituents are removed by successive washings with fresh water or plant effluent;
(47) Sludge Gas Utilization. The process of using sewage gas for the purpose of heating buildings, driving engir(es, etc.;
(48) Sludge Holding Tank (Aerated and Nonaerated). A tank utilized for small wastewater treatment plants not contalning a digester In which sludge may be
kept fresh, and supernatant withdrawn prior to a drying method (i.e. sludge drying beds); This may be done by adding a email amount of air simply to keep the
sludge fresh. but not necessarily an amount that would be required to achieve stabilization of organic matter. A nonaerated tank would simply be used to
decant studge prior to dewatering and would not allow long periods (several days of detention) without resulting odor problems;
(49) Sludge incinerators! A furnace designed to bum sludge and to remove all moisture and combustible materials and reduce the sludge to a sterile ash;
(50) Sludge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and putrescrble. and to reduce the pathogenic organism
content; This may be done by pH adjustment, chlorine dosing. or by heat treatment;
.(51) Sludge Thickener. A type of sedimentation tank In which the sludge Is permitted to settle and thicken through agitation and gravity;
(52) Stabilization Lagooe. A type of oxidation lagoon in which biological oxidation of organic matter is effected by natural transfer of oxygen to the water from
air (not a polishing pond);
(53) Stand -By Power Supply. On site or portable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids, including non -biodegradable particulate (ftoatabte solids. suspended solids and BOD
reduction) from municipal and industrial wastewater treatment systems;
(55) Tertiary Treatment. 1 A, stage of treatment following secondary which Is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal fitter
might be employed for this purpose;
(56) Thermal Pollution Control Device. A device providing for the transfer of heat from a fluid flowing In tubes to another fluid outside the tubes. or vice versa;
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat Is added for a protracted period of time to improve the dewaterability of sludge by the
solubilizing and hydrauliztng of the smaller and more highly hydrated sludge particles;
(58) Toxic Materials. Tt1ose wastes or combinations of wastes, including disease -causing agents which atter discharge and upon exposure. ingestion. Inhalation
or assimilation into any Qrganism, either directly from the environment or indirectly by ingestion through food chains. will cause death. disease, behavioral
abnormalities. cancer. genetic mutations, physiological malfunctions (Including malfunctions in reproduction) or physical deformations. In such organisms or their
offspring; Toxic materlals include, by way of Illustration and not [Imitation: lead, cadmium, chromium. mercury, vanadium. arsenic, zinc, ortho-nitro-chlorobenzene
(ONCB), polychlorinated bfphenyls (PCBs) and dichtorodiphenyl trichloroethane (DDT); and any other materials that have or may hereafter be determined to have
toxic properties;
(59) Trickling Fitter. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater Is distributed; A high rate trickling
filter is one which operaed at between 10 and 30 mgd per acre. A low rate trickling filter is one which is designed to operate at one to four mgd per acre;
(60) Trickling Filter (Packed Tower). A plug flow type of operation In which wastewater flows down through successive layers of media or filtrate material; Organic
material is removed continually by the active biological fixed growth in each successive layer. This method may produce 'secondary quality effluent. or may be
adapted to produce a nitrified effluent;
(61) Vacuum Filter, Centrifuges. or Filter Presses,. Devices which are designed to remove excess water from either digested or undigested sludge prior to disposal
or further treatment.

State of North 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
Joe Clayton, Director
Water and Sewer Department
P.O. Drawer M
Morehead City, NC 28557
Dear Mr. Clayton:
•••-•• "ft. .021V FriAl*
C)! HNF�
November 27, 1996
Subject: Request for Speculative limits
Morehead City WWTP
NPDES No. NC0026611
Carteret County
03,
A request for speculative limits, submitted by Mr. Tyndall Lewis with McDavid
Associates, Inc., has been reviewed by the Instream Assessment Unit. Due to persistent
water quality problems in Calico Creek over the past decade the Division of Water Quality
will not permit an expansion of the Morehead City WWTP at this time.
During the summer months dissolved oxygen (DO) concentrations in Calico
Creek routinely drop well below the water quality standard of 5.0 mg/L. Over the past two
years DO levels as low as 0.9 mg/L have been reported by the Town. Diurnal fluctuations
in DO indicate that eutrophication may also be a problem in Calico Creek. Chlorophyll -a
measurements collected in 1995 yielded numerous violations of the state standard, with
chlorophyll- concentrations reported as high as 234 ug/L.
The Division recognizes and supports the individual efforts made by the Carteret
County Interlocal Agency, and the joint efforts by Carteret, Craven, Onslow, and Pamlico
Counties to pursue regionalized long-term wastewater management solutions. Additional
waste flow into Calico Creek may be considered justifiable as an interim component of a
regional management plan that ultimately eliminates the discharge or results in achievement
of water quality standards.
The Division will be glad to meet with the Town and its consultants to discuss
possible wastewater treatment and disposal options. If you have any questions, please do
not hesitate to contact Andy McDaniel at 733-5083, ext 513.
Sincerely,
t
A. Preston 1-1owarc1 Jr..,_.!
P.O. Box 29535, Raleicih, North Carolina 27626-0535 Telephone [phone] FAX 919-7Z ;-9919
An Equal Opportunity Affirmative Action Empoyer 50% recycled/ 1O% post -consumer paper

cc: Steve Tedder
Don Safrit
Dave Goodrich (P&E)
Wilmington Regional Office
F. Tynd'all Lewis, McDavid Associates, Inc.
Central Files

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250 —
MHEADMON.XLS Chart 3
Instream Chlor-a Concentrations in Calico Creek
Morehead City WWTP
o "jI¢ Chlor-a
■ Chlor-a
Chlor-a Std
100— I
■
0
■
■
■
0 0
50 — ° R o o
o o ■ o ■ ■
° ■ 1 0 e d e IIe
• ■
0 1 1 1 1 1 I 1 1 0I I■ I I 1 I I I I I I I
- -P. 4h.
j N
01
01
0
e
G) 0) 0) V V :::1.T. 00 O (fl co co
j N G) -+ N 4) (D N OD j ) \ \
O O 0 0 0 O \ (a (O \ 00 co 0) -+
(-I 3
\ \ \ \ \ (� \ \ co \ \ \ co
01 (0 (0 (n (0 • C.O. (0 \
cn cn (J1 cn (n cn (n cn cn cn cn co
0)
Date
Page 1

Morehead Instrm data Chart 4
12-
10 —
x
s--,� 8 -
--- 0)
_s
•x x
c 6 _ • X
o x
o
v -- • x •
o
S XA ♦
_
d 4 - x•
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3 ♦
2 •
0
cgthp GGL lr
/7orktJ wwTP
• ♦
XX
x
♦ x ♦
X•X • x
XX
Qxx X ♦ ♦
• • X
♦ •
x
•
x
x
xx
♦ x
x
X x
♦ x
x
x
X ♦ ♦ X -X-:♦♦
Q x : •XX • X ♦ ♦ X
• • X• x
♦
x•
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X — up frvis► oo cam.
xx
x'• •-
-- •
♦ X•
• X •
XX• xx
AA
A 01 01 U1 0) 0) 0) - Z1 -,1
\ \ \ .a., ...
\J \ \
IV u1 N ds -+ N A IV
\ CJ1 (J1 \ A A \ A A
\ CO \ \ CO \ \ CO \
CO 0) CO (0 0) (O (O d) (O (O
0) d) �) O) G) C) G)
Date
Page 1
0
W
(O
0
co
N
W
(O
d)
0
N
Q)

MHEADMON.XLS Chart 2
Instream Dissolved Oxygen Concentrations in Calico Creek
Morehead City WWTP
1 4 -- ♦
12 —
1 0 - ♦
J
$ —
d X X
0
U 6 —
0 ♦
X X
4 — ♦
X
2
0
♦ DO West of DIschi
X DO East of Dischf
DO Std
A
X
•
♦
♦
X
X
♦
♦
♦
♦
X
♦
♦
X
A
X
♦
� -P. .P. U1cn cn cn in rn Cr) .i v V0000 03cc CO CO
...a.N -1. -+ N Gil 1 N Ca -• N (.3 1 N C1) -+ N 0
\ \ j 1 O O O O O O \ CQ CO \ CO CO tlD
CD \ \ Cp \ \ \ \ \ \ \ \ \ CO \ \ CO \ \
01 (0 CD 01 (0 CO CO (0 (0 CO (O CG CC Cif CO (D CJ1 CO (O (0
(71 C71 U1 Ci1 Cif Ci1 V1 (J1 (i1 (J1 Cif (J1 CA a1 U1 Ci1
Date
96/8 I/O L
Page 1

/4171/1/1
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A14rObth v65

•
Y_I;Ag IAN MI MI sB wP It ).t \y II IN It AI; ; slit' x I Nit IIVV
M1(oeksrille WWTP Bear Creek PERM CIIR LIM: 32%; UPON EXP CIIR LIM 37% Y 92 - Pass Pass
NC0050903A001 & in:9/f/94 Frequency: MayAug- - Pass - - Poss
Ea prency: Q P/F A FebT•eb Au Nov NonComp:SINCLE 93 - FA Press - Fs1 Puss - Pnss Pas9
Cowry: Davie Region: WSRO Subbasin: YAD05 94 - Paaa - - Pass - Pass - -
PF:0.1916 Special 95 - - Pass
Pa99Pa99
7Q10:0.65 IWC(%):32 Order 98 - Paaa - - ^ Puss Pass
- Pass -- Pass
Mocksvllle WWTP Dutchman's Crk PERM CIIR LIM: 7% V 92 Pass - Pass Pass N00021491/001 Begia:7/I/94 F P/F A Jan A JulOct - - - Pess -
Y: Q Apr NonComp:SINGLE 93 Pass - - M Pass Pass
County:Davie Region: WSRO Subbasin: YADOS 94 Pae9 -
PF:0.68 Special - - Pass - - Pass --- - Late Pass(s)
7QI0 15.0 IWC(%):6.57 Order. 95 Pass - - Pass - - Pass - ( I
98 Fail•Pasa - - t� Pass
Pass
Monarch hosiery PERM: 2411R AC P/F LIM 90% (FIND) Y 92 - - Passl Passl _
NC0001210/001 Be'n:10/1/93 - - Passl - Paill,Faill
!7 Frequency: A Marian NonComp:SINGIE 93 - - Passl - Passl - Passl - Fast
Cowty:Alainan a Region: WSRO Subbasin: CPF02 94 911.81I Fail! Feill,Failf Pas- sl Paasl - Passl PF:QOS Special 95 - - - - - - f'assl
Pass!- Pa99 Peso Pa99
7Q1R 47.3 IWC(%):0.16 Omer 98 - - Isii Pass - - - - -
Pasa -
Monroe WWTP PERM CIIR LIM: 90%; PF NOT TO EXCEED I IMGD 92 Pass Pass Pess Pass Pass Pasa Pass NC0024333I001 Be 'n: 12/I/94 r - Pass Pess - Fail
& Frequency: Q PR A Mar Dec NonCunsp:SINGIE 93 Pass - Pacts - Fail Pass - Pass - Poss
County: Union Region: MRO Subbasin: YADI4 94 - - Pass - - Pase
Pass Paso
PF:7.OD Special 95 - Pass Pess - Pasa
7QI0:0,43 IWC(%):96.18 Older: 98 - - - - - - - i>ass,Fail
Pass - - Pass -
Monsanto/001,002 Penn 24hrp/(xlim:90%fthd(combined outfall) y 92 N.NI - - >90• - >100,>1001 - NC0003719/002 Begin:1/1/96 Frequency: Q P/P A Feb May Aug Nov NonConnp:Single 83 >1001,>f00' -_ - >100. - - 71.0' -
County:Cumberland Region:FRO Subbasin:CPF15 - _ - ->100%>1� - - >foo' - -
94 >100•,>t00f -Passl
PF:1.3 Special 95 - Passl Passl - - Passl - - Paasl -
7QIOE 791.0 IWC(%):0.25 Omer 96 - Pass - - - Pass - - Pass -
Pa9s - -
Moore County WWTP PERM CIIR LIM: 41% It 92 Pass Pass Pass Pass Paso Pass Pass NC0037508/00I &gio:l/1/95 Frequency: Q P/F A Mar Jun Se Dec - Pass - Pass
p NonComp:SINGLE 93 - -- Pass - Pass Pass - Pass -
Pass
Couoty:M1foare Region: FRO Subbasin: LUM50 94 Pass - Fail,Pas9 - Pasa
PF:6.70 Special - - Late Pass - Pass 95 - Pnss - - Pass - Pass
7Q10 15.2 IWC(%):40.54 Order. 98 -- - Pass
Puss - - Pass -
Mooresville WWTP PERM CIIR LIM: 90%
NC0046728/001 Begin:11/1/94 Fn.qucncy: Q P/P A Feb May Aug Nov
County:In:del Region: MRO Subbasin: YAD11
PF: 5.20 Special
71410: 0.5 IWC(%):94.15 Order:
Morehead City WWTP PERM 241IR AC P/P LIM: 90% MYSID
NC0026611/001 Begin:5/1/93 Frequency: Q A Feb May Aug Nov NonConnp:SINGIE
County:Carteret Region: WIRO Subbasin: WOK03
PF:1.7 Special
7QIO:TIDAL IWC(%):NA Order
5' 92 - -- Fail Puss Pass,Fall - - Pass - Pass
NonComp.SIN(;I li 93 - Ill -- - Pass --- - Pass - - Pass -
94 - Fail Puss - Fad Pass - Pass Bt Foil
95 Pass Fail Foil Fail Pass - - Pass - -
P899
98 -. Pass --- --. Pass - Pass
92 - -. -
93 - - - - - - - Pass - - Pass
94 - NFVPass - - Pass - - Fall,Pass - Pass
95 - Pass - - Pass -- - Pass - - -
Pass _
96 - Pass - - F811,Pes9 - -
Morganists-Catawba Riv Pollution Fad! PERM CIIR LIM: 9.0% 92 Pass - - - -- Pass - Pass
Pass
NC0026573/001 & :5/1/93 Fr
equency: Q WV A Jan Apr Jul Oct NonConrs(r:SING1E 93 Pass - - Pass Pass Pass .--
County:Burke Regin:ARO Subbasin:CTB31 - 94 Poos - Peas - Pass
I'lr:8.00 Special 95 Pass - -- Late Pass
7Q10:126.00 IWC(%):8.96 Omer. - - NR/Pass Pass - -- Pass
Pa -- ..
06 Pass - - Pass - Pass
Morrisville -Aviation WWTP PERM CIIR LIM: 90% 92 Pass - - Pass
NC0050041/001 Be ' :6/I/93 - --- Pass - -
_ - Fat Pass
t re• Q P/F A Jan Apr Jul Oct NonComp:SlNGIE 93 PassPass Pass - Pass
County:Wake Region: RRO Subbasin: NEU01 94 Pass - - Pasa - Pass-
PF:0.20 Special - - - Fail.Pass - -
95 Pass - - Pass Pass - Pass
7QL0 0.0 IWC(%):100.0 Order 98 Pass - - Pass - - -
Pass
MI. Airy WWTP Penn chr Iim: 42%
NC0021121/001 Begin:7/1/94 Frequency: Q I'/F A Jan Apr Jul Oct
County:Starry Region: WSRO Subbasin: YAU03
PF: 7.0 Special
7Q 10: 14.9 I WC(%):42.0 Order.
NonComp:Single
Y 92 Fail,FJ Fail,F1, Fail,Pt Fail,FI Passl.Fail Passf,Pass Pass,Passf Passl 141 Passl,Pass Passl Passl
93 Pessl,Fail Passl,Pass Passl Pass - - Fad Pass - Pass
94 Pass - - Pass - Pass •- - Pass -
_95 Pass - - Pass - Fad Pasa - - Fell•Pass -
98 Fai Pass -- Pass -- - Pass
0 2 consecutive failures = significant noncompliance V Pre 1992 Data Available
IEGFND:
PERM = Pamit Requirement I.ET = Administrative letter - Target Frequency = Monitoring frequency; Q- Quarterly; M- Monthly; BM- Bimonthly; SA- Semiannually; A- Annually; OWD- Only when disc
harging; D- monitoring requirement:
Begin = lint month required 7Q 10 = Receiving stream low flow criterion(cfs) A = quarterly monitoring increases to monthly upon single failure Months that testing must occur • ex. JAN,A PR JUL,OCI' N nCompr=Currrontent Compliance Requirement IS- Conducting independent study PF = Permitted flow (MGD) JWC%= Instrearn waste concentration P/F = Pass/Fail chrunic test AC = Acute CIIR = Chronic
f)ata Notation: f - Fathead Minnow; a - Ceriodaohnia so.; my • Mvsid shrimp; ChV - Chronic value; P - Mortality of slated percentage at highest concentration: at - Perfumed by DEM Tog Eval Group; bt - Bad test
Reporting Notation: -- = Data not requited; NR - Not reported; ( ) - Beginning of Quarter Facility Activity Status:1- Inactive, N - Newly lssued(fo construct); 11 - Active but not discharging; f-More data avulable for nsonth in question Its ORC signature needed
33
•

Morehead City WWTP and Surrounding Dischargers
1
Vicinity Map
Legend
Road/Highway
• NPDES Discharger
A/ Non SA Waters
A/ SA Waters
Municipality
0
1
2 Miles
NC Department of Environment,
Health, and Natural Resources
Water Quality Section
Instream Assessment Unit
Draft Map

)1arriott
HOTELS • RESORTS • SUITES
t c.W\ C'1/4)Ji ,),;„0-
t‘i\.(°\ iv_ow- \,,i,v, 0 . e,
,o,), o\fle.
er
v4(` v- e c)". f
6, 4-29,. cok3E\ ,,,gx.:D:),4 `co
/ (21- &-f L,A>(--,,, \P- -1" (,,f(''' .i.
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/ vie\
r L, f(i7 p -4 /c 5 Kc�
A a\,o
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�vo

1J1r1i1j LJ J1 ti1Lc7
'LRTMENT OF THE INTERIOR
• GEOLOGICAL SURVEY
CRag
-v.
v ILLA
c
• 40000m•E. '41�
o ®'
x
VJWTe
•
•
Jf L, _t Piggotts
rr-
o Light
xceoo
Dolphins
�r5
•
CupolasWI +� •..
342
Crab poi.'nt Q
L^-Bay i
Calico Creek
111111114P-1112),Q r4yo
a 0©6
343
bl e
d
344j
—A Ruin
Crab Pt
oz.
1
,r-
iitiaiiII
Par :tiVr
i, :r;;
IR-
,
'fit 1 �Zl
�1 t
INTRACOASTAL
Money Island
Bay
Money
V�lglar d
•
1 •
Beacon o
0 Beacon
o Light
WA T ERWA Y
SOUND
Trailer
-. Park..
Money Island B h• • . — —_
..,
w
crAKP
Dolphins
Tar Landing
Bay
Ng -
Port
ammo.
Light

NPDES WASTE LOA) ALLOCATION
PERMIT NO.: NC0026611
PERMI'1"I'EE NAME:
FACILITY NAME:
Town of Morehead City
Morehead City
Facility Status: Existing
Permit Status: Renewal
Major I Minor
Pipe No.: 001
Design Capacity: 1.7 MGD
Domestic (% of Flow): 100
Industrial (% of Flow):
Comments:
- no SIU's.
101-e-4-Pa-6=447Z- lvz7 r 4/—
RECEIVING STREAM: Calico Creek
Class: SC
Sub -Basin: 03-05-03
Reference USGS Quad: I 32 NW (please attach)
County: Carteret
Regional Office: Wilmington Regional Office
Previous Exp. Date: 7/31/97 Treatment Plant Class: Class III
Classification changes within three miles:
Requested by: Mark McIntire Date: 10/23/96
Prepared by: Date:
Reviewed by: Date:
Modeler
Date Rec.
#
iktIM
►d2,41(-)c,
gsz(
Drainage Area (mi2 )
Avg. Streamflow (cfs):
7Q10 (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC % Acute/Chronic
-Instream Monitoring:
Parameters
Upstream Location
Downstream
Location
Effluent
Characteristics
Summer
Winter
BOD5 (mg/1)
NH 3-N (mg/1)
D.O. (mg/I)
TSS (mg/1)
F. Col. (/100 ml)
pH (SU)
Comments:

10
11 •
MOREHEAD CITY
WASTEWATER TREATMENT PLANT
1A
t t
INFLUENT
no:1 02
9
6
5
EFFLUENT
discharge
n o.103
NPDES PERM'itNO.
NC0026611

o •
WELCOME TO THE MOREHEAD CITY
WASTEWATER TREATMENT PLANT -
The average person produces 100 - 170 gallons of wastewater per day.
The average household produces 3,000 - 5,000 gallons of wastewater per
month. The wastewater entering the treatment plant is 99.9% water and
only 0.1% solid waste. The purpose of a wastewater treatment plant is
to remove the waste from the water and reduce its threat to the public
health. The Morehead City Wastewater Treatment Plant has a maximum
capacity of 2,700,000 gallons per day. The attached treatment plant
diagram will aid in understanding the flow and treatment of that
wastewater. `
The water coming into the plant (influent) undergoes pretreatment in
the GRIT REMOVER (1). The grit remover takes out the heavy coarse
material (sllnd, gravel, egg shells, etc.) from the wastewater. It
also aerate and freshens the water. A flow -measuring device is
installed at this point to record the volume and rate of water
entering the plant. The water then flows to a SPLITTER BOX CiA) which
divides the flow between the two PRIMARY CLARIFIERS (2). In the
primary clarifier it undergoes primary treatment. The clarifier
allows oil, grease and other very light materials to float to the
water's surface and be removed by a skimmer arm. The insoluble
materials settle to the bottom of the clarifier and are pumped to the
digesters. The water then flows on to the TRICKLING FILTERS (3) where
it undergoes secondary treatment. Secondary treatment is a biological
process wherby millions of.micro-organisms consume and stabilize the
organic material in the water. The slime on the trickling filter
media is produced by the micro-organisms as they feed and grow. From
the trickling filter, the water flows into the SECONDARY CLARIFIERS
(4). Insoluble material and any slime which has sloughed off the
trickling filter media is allowed to settle in these clarifiers and -is
pumped to the digesters. The last stop in the treatment process is
the CHLORINE CONTACT CHAMBERS (5). Here chlorine is added as a
disinfectant before the treated water (effluent) is discharged into
the receiving stream. One ton cylinders of chlorine gas and the
chlorinating equipment are .located in the CHLORINE BUILDING (6). The
pumps which recirculate water through the trickling filter and other
pumps which carry sludge to the digester are located in the PUMP
BUILDING (9).
The sludge pumped from the bottomof the clarifiers is deposited in
the DIGESTERS (7). The materials inthe sludge are further broken down
by micro-organisms. The "digested" sludge finally contains materials
which cannot be decomposed any further. This sludge is spread on the
SAND DRYING BEDS (8). Here the waste is allowed to dry before it is
taken to a landfill.
The SHOP BUILDINGS (11) contain spare parts, tools and other equipment
necessary for maintenance and repair of all treatment plant equipment.
The primary objective is to keep the plant running efficiently. All
treatment processes are monitored in the WASTEWATER LABORATORY (10).
Samples of influent and effluent waters are collected daily and
brought here for analysis.

DO Conc. (mg/L)
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
— ♦
X
♦
Instream Dissolved
♦ DO West of Dischg
X DO East of Dischg
DO Std
T aJtaJ yrt� / Ion yam rCV ecc.) ayJ
Nat n e6 e55A/1.h_c_ 5 cvi fz 744_ /eZj
dye rr
e5 : n f / �4..�y 4.�lr,� &ccL
C1 L / 1 ncii La 7L!'LlA,c.. GD Gl l l fi^Gc e GGp
huipt ST/Y (1 . �uce Ma toy', S-740i--71:ts
Ad-t_ ,,h0//coda atz4.
'' / 4LS/ R�'Ld L✓P.S1� d� f�
A4
X
X
♦
♦ ♦
♦
X
X
♦
X
♦
♦
♦
X
X
♦
X
♦
O
(1
713
S6/0Z/9 -
W
O_
ID
(T1
U1 (D
(J1
ID
OD
(D
01
96/8Z/6 -
_O
W
co
(n
O
CO
O

qv
DO Conc. (mg/L)
11
10
9
X
8— ♦ ♦ ♦
7-- ♦X X ♦ X ♦ XX X Xx Q
6 — ♦ X ♦ ♦ X
X ♦ XX
�♦
5 — --X X 4. XX x♦X : X X X---*-----♦ X'-X-�♦Vxx
----♦- --
4 — ♦♦
X X ♦xx♦
♦ X ♦ ♦ ♦ X XX♦ x X
♦
x♦ ♦
♦ Q♦xx x ♦ ♦ X ♦ X ♦
♦ X♦
3 — ♦
♦ X ♦ ♦ X
Instream Dissolved Oxygen Concentrations in Calico Creek
April -October 1996
Morehead City WWTP
x
x
2 —
1
0
X
4 01 01 c71 0) 0) 0) V •4 V 20 00 (0 (0 (0 j
N (71 -` N - N A 1 N W N N - N
c
01 071 01 4 A - ? •P CO co — N N N
(0 — (0 - - (0
0) (0 (0 0) (0 (0 0) (0 (0 0) (0 (0 0) (0 (0 (0
0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0) 0)
Date
♦ DO West of Dischg X DO East of Dischg
DO Std

RATING SCALE FOR CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: :TOtsiv•/ U F • � 0 re. rt d C ' '' Owner or Conta t Person: :Toe C.k+ v+ t UJ h
Mailing Address: PO ) c i/ Jer ff 0 ( 1'-eacc C i 4-i BJL "�?) 5S- 7
County: Telephone: (°11I) 7 ' S0 2, Z.-
Present Classification: LIU_ New Facility Existing Facility
NPDES Per. No. NCOO 2 66 I1 ' Nondisc. Per. No.WQ Health Dept.Per No.
Rated by: 5 v Je.5 f Telephone: cilO 3 5S-3 SOJ Date: )1--
Reviewed by: Health Dept.
Regional Office
Central Office
ORC: V.t.\4 LcAl y.5`tMejev Grade:
Check Classification(s): Subsurface • Sp - Irrigation
Wastewater Classification: (Circle One) I 11 IV
Telephone:
Telephone:
Telephone:
Telephone:
Land Application
Total Points: S
IN -PLANT PROCESSES AND RELATED CONTROL EQUIPMENT WHiCH ARE AN INTEGRAL PART OF iNDtBZRIAL PRODUCTION SHALL NOT BE •
CONSIDERED WASTE TREATMENT FOR THE PURPOSE OF CLASSIFICATION. ALSO SEPTIC TANK SYSTEMS CONSISTING ONLY OF SEPTIC TANK
AND GRAVITY NITRIFICATION LINES ARE EXEMPT FROM CLASSIFICATION
SUBSURFACE CLASSIFICATION
(check all units that apply)
1. septic tanks
2. pump tanks
3. siphon or pump -dosing systems
4. sand filters
5. grease trap/interceptor
6, oil/water separators
7. gravity subsurface treatment and disposal:
8. pressure subsurface treatment and disposal:
In addition to
be rated using
the
the
SPRAY IRRIGATION CLASSIFICATION
(check all units that apply)
1. preliminary treatment (definition no. 32 )
2. lagoons
3. septic tanks
4. pump tanks
5. pumps
6. sand filters
7_ grease traprnterceptor
8. oil/water separators
9. disinfection
10. chemical addition for nutrient/algae control
11. spray irrigation of wastewater
above classifications, pretreatment of wastewater in excess of these components shall
point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RESIDUALS CLASSIFICATION (Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACUTY CLASSIFICATION
The following systems, shall be assigned a Class 1 classification. unless the flow is of a significant quantity or the technology is unusually
complex, to require consideration by the Commission on a case -by -case basis: (Check if Appropriate)
1. OiVwater Separator Systems consisting only of physical separation, pumps and disposal;
2. Septic Tan Sand Filter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, disinfection
and direct ischarge;
3. Lagoon Systems consisting only of preliminary treatment. lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and direct discharge;
4. Closed -loop, Recycle Systems;
5. Groundwater Remediation Systems consisting only of oil/water separators, pumps, air -stripping, carbon adsorption, disinfection
and disposal;
6. Aquaculture operations with discharge to surface waters;
7. Water Plant sludge handling and back -wash water treatment;
8. Seafood pressing consisting of screening and disposal.
9 _Single-family discharging systems. with the exception of Aerobic Treatment Units, will be dassified if permitted after July 1,
1993 or if upon inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, in writing.

The following scale 'is used for rating wastewater treatment facilities: (circle appropriate points)
(3)
(4)
(5)
(6)
(1) Prechlortnatlon
PRIMARY TREATMENT tNiTS/PROCESSES
ITEM POINTS
Industrial Pretreatment Units or Industrial Pretreatment Program (see definition No. 33) 4
DESIGN FLOW OF PLANT IN gpd [not applicable to non -contaminated cooling waters, sludge handling facilities for
water purification plants. totally closed cycle systems(see definition No. 11), and facilities consisting only of item
(4)(d) or items (4)(d) and (11)(d))
0 - 20,000 1
20.001 - 50,000 2
50,001 - 100,000 .3 ` earn IT i,t M
locum,- 250.000 4 .71wtb 1'
250,001 - 500,000 .5
500,001 - 1,000,000 a
1,000, 001 - 2,000.000 -, o { ��
2.000.001 (and up) rate 1 int additional for each 200,000 gpd capactty up to a maximum of 3u 1
Design Flow (gpd)_2 t)0IWO
PRELIMINARY UNITS/PROCESSES ( definitt n No.32)
(a) Bar Screens
or •
(b) Mechanical Screens, Static Screens or Comminuting Devices 2
(c) Grit Removal 1
or (d) Mechanical or Aerated Grit Removal ,2 0
(e) Flow Measuring Device 1
or
(I) Instrumented Flow Measurement (.2
(g) Preaeratlon `)
(h) influent Flow Equalization 2
(I) Grease or Oil Separators - Gravity 2
Mechanical 3
Dissolved Air Flotation .8
.5
(a) Septic Tank (see definition No. 43) 2
(b) Imhoff Tank
(c) Primary Clarttiers 5
(d) Settling Ponds or Settling Tanks for inorganic Non -toxic Materials (sludge handling facilities for water
purification plants. sand. gravel. stone, and other mining operations except recreational activities such as gem
or gold mining) 2
SECONDARY TREATIVEN r UNITS/PROCESSES
(a) Carbonaceous Stage
(1) Aeration -High Purity Oxygen System 20
Diffused Air System 10
Mechanical Air System (fixed. floating or rotor) .8
Separate Sludge Reaeratton ,3
(11) Trickling Fitter
High Rate q
Standard Rate
Packed Tower .5
(ill) Biological Aerated Filter or Aerated Biological Fitter 10
(iv) Aerated Lagoons 10
(v) Rotating Biological Contactors 10
(vi) Sand Filters -Intermittent biological 2
Recirculating biological 3
(vi! j Sttaabilliz ation Lagoons
(ix) Single stage system for combined carbonaceous removal of BOO and nitrogenous removal b
nitrification (see definition No. 12)(Points for this item have to be in addition to items
(5)(a)(I) through (5)(a)(viil),
utilizing the extended aeration process (see definition No.3a) 2
utilizing other than the extended aeration process. 8
(x) Nutrient additions to enhance BOD removal .5
(xl) Biological Culture ("Super Bugs')addltion 5
(b) Nitrogenous Stage
(I) Aeration - High Purity Oxygen System .20
Diffused Air System t 0
Mechanical Air System (fixed. floating or rotor) , 5
Separate Sludge Reaaration .3
(II) Trickling Filter -High Rate 7
Standard Rate .5
Packed Tower .5
(ill) Biological Aerated Fitter or Aerated Biological Fitter 10
(iv) Rotating Biological Contactors 10
(v) Sand Fitter - intermittent biological 2
Recirculating biological .3
v) gasifier
.5
TERTIARY OR ADVANCED TREATMENT tNiTSJPROCESSES
(a) Activated Carbon Beds -
without carbon regeneration .5
with carbon regeneration 15
(b) Powdered or Granular Activated Carbon Feed -
without carbon regeneration .5
with carbon regeneration 15
(c) Air stripping .5
(d) Denttrificatlon Process 10
(0) Electrodlalysis 5
(f) Foam Separation .5
(g) !on Exchange 5
(h) Land Application of Treated Effluent (see definition No. 22b) (not applicable for sand. gravel. stone
and other similar mining operations) by high rate infiltration A
(I) Microscreens 5
(J) Phosphorous Removal by Biological Processes (See definition No. 26) 20
(k) Polishing Ponds - without aeration 2
with aeration .5

()
(m)n
(o) Treatment processes for removal of metal or cyanide
Post Aeration - cascade
diffused or mechanical
Reverse Osmosis/
Sand or Mixed -Media Filters - low rate 2
high rate 5
15
15
(p) treatment processes for removal of toxic materials other than metal or cyanide
(7) SLUDGE TREATMENT
(a) • Sludge Digestion Tank - Healed (anaerobic).
Aerobic
Unheated (anaerobic) 0
(b) Sludge Stabilization (chemical or thermal)
(c) Sludge Drying Beds - Gravity
Vacuum Assisted
(d) Sludge Elutrlation .5
(e) Sludge Conditioner (chemical or thermal) .5
(f )' Sludge Thickener (gravity) .5
(g) Dissolved Air Flotation Unit [not applicable to a unit rated as (3)(I)] 8
(h) Sludge Gas Utilization (including gas storage) 2
(I Sludge Holding Tank - Aerated .5
Non -aerated 2
(J) Sludge Incinerator (not including activated carbon regeneration) t 0
() Vacuum Filter, Centrifuge, or Filter Press or other similar dewatering devices 10
(8) RESIDUALS UTILiZATION/DISPOSAL (induding incinerated ash)
(a) Lagoons
(b) Land Application (surface and subsurface) (see definition 22a)
by contracting to a land application operator or landfill operator who holds the land application permit
or landfill permit
(o) Dedicated Landfill(burial) by the permittee of the wastewater treatment facility .5
DtSITECTEN
( ) Chlorination
(0) Dechlorination
(c;) Ozone 5.);
(1) Radiation
CHEMICAL ADDITION SYSTEM(S) ( see definition No. 9) [not applicable to chemical additions rated as hem (3)(J),
(5)(a)(x1). (6)(a), (6)(b), (7)(b), (7)(e), (9a). (9)(b) or (9)(c) 5 points each:
List
(11) MtSCt3LANEOUS UNITS/PROCESSES
(a) Holding Ponds, Holding Tanks or Settling Ponds for Organic or Toxic Materials Including wastes from mining
operations containing nitrogen or phosphorus compounds in amounts significantly greater than Is common
lfor domestic wastewater 4
(b) Effluent Flow Equalization (not applicable to storage basins which are inherent to land application systems) .2•
(c) Stage Discharge (not applicable to storage basins inherent in land application systems)
43°
(d) Pumps
(e) Stand -By Power Supply
(f )I Thermal Pollution Control Device
TOTAL POINTSt
2
2
.5
CLASSIFICATION
Ciass I 5-25 Points
Class I1 26-50 Points
Class 51-65 Points
Gass IV 66-Up Points
Facilities having a rating of one through four points, inclusive, do not require a certified operator.
Facilities having an activated sludge process win be assigned a minimum classification of Class 11.
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class il.
Facilities having treatment processes for the biological removal of phosphorus will be assigned a minimum classification of Class III.
5
5
5
5
.0004 DEF1MTIONS
The following definitions shall apply throughout this Subchapter.
(1) Activated Carbon Beds. A physical/chemical method for reducing soluble organic material from wastewater effluent; The column -type beds used in this
method will have a flow rate varying from two to eight gallons per minute per square foot and may be either upflow or downflow carbon beds. Carbon may or
may not be regenerated on the wastewater treatment plant she;
(2) Aerated Lagoons. A basin in which ail solids are maintained in suspension and by which biological oxidation or organic matter is reduced through artificially
accelerated transfer of oxygen on a flow -through basis;
(3) Aeration. A process of bringing about intimate contact between air or high purity oxygen In a liquid by spraying, agitation or dlffuslon;(3a) Extended
Aeration. An activated sludge process' utilizing a minimum hydraulic detention time of 18 hours.
(4) Agriculturally managed side. Any she on which a crop Is produced, managed, and harvested (Crop includes grasses. grains, trees, etc.);
(5) Air Stripping. A process by which the ammonium ion Is first converted to dissolved ammonia (pH adjustment) with the ammonia then released to the
atmosphere by physical means; or other similar processes which remove petroleum products such as benzene, toluene, and xylene;
(6) Carbon Regeneration. The regeneration of exhausted carbon by the use of a furnace to provide extremely high temperatures which volatilize and oxidize the
absorbed impurities;
(7) Carbonaceous Stage. A i,stege of wastewater treatment designed to achieve .'secondary effluent limits;
(8) Centrifuge. A mechanical device In which centrifugal force is used to separate solids from liquids or to separate liquids of different densities;
(9) Chemical Addition Systems- The addition of chemicals) to wastewater at an application point for purposes of Improving solids removal, pH adjustment,
alkalinity control, etc.; the capability to experiment with different chemicals and different application points to achieve a
system; the I aPP P specific result will be considered one
y capability to add chemtcal(s) to dual units will be rated as one system; capability to add a chemical at a different application points for different
purposes will result In the systems being rated as separate systems;
(10) Chemical Sludge Conditioning. The addition of a chemical compound such as time, ferric chloride, or a polymer to wet sludge to coalesce the mass prior to
Its application to a dewatertng device;
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment of wastewater containing Inorganic, non -toxic materials from sand. gravel,
crushed stone or other similar operations. Such systems shall carry a maximum of two points regardless of pumping facilities or any other appurtenances;
(12) Combined Removal of Carbonaceous BOD and Nitrogenous Removal by Nitrification- A single stage system requirod to achieve permit effluent limits on BOD
and ammonia nitrogen whhin'the same biological reactor
(13) Dechtorination. The partial or complete reduction of residual chlorine In a liquid by any chemical or physical process;
(14) Denhrffication Process. The conversion of nitrate -nitrogen to nitrogen gas;

l
(15) Electrodialysis. process for removing ionized salts from water through the use of ion -selective ion -exchange membranes;
(16) Filter Press. A process operated mechanically for partially dewatering sludge;
(17) Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the introduction of air In the form of fine bubbles; also called foam fractionation;
(18) Grtt Removal. The process of removing grit and other heavy mineral matter from wastewater;
(19) Imhoff Tank. A 'deep two story wastewater tank consisting of an upper sedimentation chamber and a lower sludge digestion chamber.
(20) Instrumented FIo w Measurement. A device which indicates and records rate of flow;
(21) Ion Exchange. A chemical process in which ions from two different molecules are exchanged;
(22) Land application:
(a) Sludge Disposal. A final sludge disposal method by which wet sludge may be applied to land either by spraying on the surface or by subsurface injection
(i.e., chisel plow); [not applicable for types of sludge described in (11) of this Rule];
(b) Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application of wastewater onto a land area as a
means of final disposal or treatment;
(23) Microscreen. A low speed, continuously back -washed, rotating drum fitter operating under gravity conditions as a polishing method for removing
suspended solids from effluent;
(24) Nitrification Process. The biochemical conversion of unoxidized nitrogen (ammonia and organic nitrogen) to oxidized nitrogen (usually nitrate);
(25) Nitrogenous Stage. A separate stage of wastewater treatment designed for the specific purpose of converting ammonia nitrogen to nitrate nitrogen;
(26) Phosphate Removal. Biological. The removal of phosphorus from wastewater by an oxic/anoxic process designed to enhance luxury uptake of phosphorus
by the microorganisms;
(27) Polishing Pond. IA holding pond following secondary treatment with sufficient detention time to allow settling of finely suspended solids;
(28) Post Aeration. Aeration following conventional secondary treatment units to increase effluent D.O. or for any other purpose;
(29) Post Aeration. (Cascade) A polishing method by which dissolved oxygen is added to the effluent by a nonmechanical. gravity means of flowing down a
series of steps or weirs; The flow occurring across the steps or weirs moves in a fairly thin layer and the operation of the cascade requires no operator
adjustment; thus. zero points are assigned even though this Is an essential step to meeting the limits of the discharge permit;
(30) Powdered to Granular Activated Carbon Feed. A biophysical carbon process that utilizes biological activity and organic absorption by using powdered or
granular activated carbon; Virgin or regenerated carbon is feed controlled Into the system;
(31) Preaeration. A tank constructed to provide aeration prior to primary treatment;
(32) Preliminary Units.) Unit operations in the treatment process. such as screening and comminution, that prepare the liquor for subsequent major operations;
(33) Industrial Pretreatment.
(a) Pre-treatment Unit, Industrial. The conditioning of a waste at its source before discharge. to remove or to neutralize substances Injurious to sewers and
treatment processes or to effect a partial reduction in load on the treatment process which is operated by the same governing body as the wastewater
treatment plant being rated;
b) Pre-treatment Program. Industrial - must be a State or EPA required program to receive points on the rating sheet;
(34) Primary Clarifiers. I The first settling tanks through which wastewater is passed In a treatment works for the purpose of removing settleable and suspended
solids and BOD which Is associated with the solids;
(35) Pumps. All influent, effluent and in -plant pumps;
(36) Radiation. Disinfection or sterilization process utilizing devices'smitting ultraviolet or gamma rays;
(37) Reverse Osmosis. ' A treatment process in which a heavy contaminated liquid is pressurized through a membrane forming nearly pure liquid tree from
suspended solids;
(38) Rotating Biological Contractors. A fixed biological growth process in which wastewater flows through tanks in which a series of partially submerged circular
surfaces are rotated;
(39) Sand Filters:
(a) Intermittent Biological. Filtration of effluent following septic tanks, lagoons, or some other treatment process in which further biodecomposttlon is
expected to produce desired effluents; Hydrautic loading rates on these filters are computed in gpolac and have a resulting low gpm/sf (less than one);
b) Recirculating bioi ,gical - the same type of sand fitter as defined in Subparagraph (39) (a) of this Rule with the added capability to recycle effluent back
through the sand filter
(40) Sand or Mixed -Media Fitters. A polishing process by which effluent limits are achieved through a further reduction of suspended solids;
(a) low rate — gravitti, hydraulically loaded fitter with loading rates In the one to three gpm/sf range;
(b) high rate — a pressure, hydraulically loaded fitter with loading rates in the five gprn/sf range; At any rate. the loading rate will exceed three gpm/sf;
(41) Secondary Clarifiers. A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the
blological treatment units;
(42) Separate Sludge Reaeration. A part of the contact stabilization process where the activated sludge Is transferred to a tank and aerated before returning It
to the contact basin;
(43) Septic Tank. A single -story settling tank in which settled sludge is in contact with the wastewater flowing through the tank; shall not be applicable for
septic tank systems serving single family residences having capacity of 2.000 gallons or less which discharge to a nitrification field;
(44) Sludge Digestion. The process by which organic or volatile matter and sludge is gasified. liquefied mineralized or converted into more stable organic matter
through the activity of living organisms, which includes aerated holding tanks;
(45) Sludge Drying Beds: An area comprising natural or artificial layers of porous materials upon which digested sewage sludge is dried by drainage and
evaporation;
(46) Sludge Elutriatlon. 'A process of sludge conditioning in which certain constituents are removed by successive washings with fresh water or plant effluent;
(47) Sludge Gas Utilization. The process of using sewage gas for the purpose of heating buildings. driving engirfes. etc.;
(48) Sludge Holding Tank (Aerated and Nonaerated). A tank utilized for small wastewater treatment plants not containing a digester In which sludge may be
kept fresh. and supematent withdrawn prior to a drying method (I.e. sludge drying beds); This may be done by adding a small amount of air simply to keep the
sludge fresh. but not necessarily an amount that would be required to achieve stabilization of organic matter. A nonaerated tank would simply be used to
decant sludge prior to dewatering and would not allow long periods (several days of detention) without resulting odor problems;
(49) Sludge incinerators. A furnace designed to bum sludge and to remove all moisture and combustible materials and reduce the sludge 10 a sterile ash;
(50) Sludge Stabilization (Chemical or Thermal). A process to make treated sludge less odorous and putrescible, and to reduce the pathogenic organism
content; This may be dome by pH adjustment, chlorine dosing. or by heat treatment;
(51) Sludge Thickener. A type of sedimentation tank In which the sludge is permitted to settle and thicken through agitation and gravity;
(52) Stabilization Lagoon A type of oxidation lagoon in which biological oxidation of organic matter Is effected by natural transfer of oxygen to the water from
air (not a polishing pond);
(53) Stand -By Power Supply. On site or portable electrical generating equipment;
(54) Static Screens. A stationary screen designed to remove solids, including non -biodegradable particulate (floatable solids, suspended solids and BOD
reduction) from municipal and industrial wastewater treatment systems;
(55) Tertiary Treatment. A. stage of treatment following secondary which is primarily for the purpose of effluent polishing; A settling lagoon or sand or coal fitter
might be employed for this purpose;
(56) Thermal Pollution Centro! Device. A device providing for the transfer of heat from a fluid flowing in tubes to another fluid outside the tubes. or vice versa;
or other means of regulating liquid temperatures;
(57) Thermal Sludge Conditioner. A conditioning process by which heat Is added for a protracted period of time to improve the dewaterability of sludge by the
solubilizing and hydraufizing of the smaller and more highly hydrated sludge particles;
(58) Toxic Materials. Those wastes or combinatlons of wastes. Including disease -causing agents which after discharge and upon exposure, ingestion. Inhalation
or assimilation into any organism, either directly from the environment or indirectly by ingestion through food chains. will cause death. disease. behavioral
abnormalities. cancer. genetic mutations. physiological malfunctions (including malfunctions in reproduction) or physical deformations. In such organisms or their
offspring; Toxic materials Include. by way of Illustration and not limitation: lead, cadmium. chromium, mercury, vanadium. arsenic. zinc, ortho-nitro-chlorobenzene
(ONCB), polychlorinated blphenyts (PCBs) and dichlorodiphenyl trichloroethane (DDT); and any other materials that have or may hereafter be determined to have
toxic properties;
(59) Trickling Fitter. A biological treatment unit consisting of a material such as broken stone or rock over which wastewater is distributed; A high rate trickling
filter Is one which operated at between 10 and 30 mgd per acre. A low rate trickling fitter Is one which is designed to operate at one to four mgd per acre;
(60) Trickling Filter (Packed Tower). A plug flow type of operation in which wastewater flows down through successive layers of media or filtrate material; Organic
material is removed continually by the active biological fixed growth In each successive Layer. This method may produce 'secondary quality effluent, or may be
adapted to produce a nitrified effluent;
(61) Vacuum Fitter. Centrifuges. or Filter Presses. Devices which are designed to remove excess water from either digested or undigested sludge prior to disposal
or further treatment.