NC0023973_Permit (Issuance)_19960722

NPDES DOCUMENT '!'CANNIN`: COVER SHEET
NPDES Permit:
NC0023973
Wilmington Southside WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Technical Correction
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
July 22, 1996
'This document is printed on reuse paper - ignore any
content on the reirerse side

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
Mr. Hugh T. Caldwell, P.E.
Director of Public Utilities
P.O. Box 1810
Wilmington, North Carolina 28402
Dear Mr. Caldwell:
440
QEI-1NFl
July 22, 1996
Subject: NPDES Permit Issuance
Permit No. NC0023973
M'Kean Maffitt Plant O
New Hanover County
In accordance with the application for discharge permit received on December 29,
1995, the Division is forwarding herewith the subject state - NPDES permit. This permit is
issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental
Protection Agency dated December 6, 1983.
In response to your comments, the Division has made the following changes to the
DRAFT permit:
a) The Biosolids facility has been included on the Supplement to Cover Sheet.
b) The instream monitoring frequency for temperature has been changed to
weekly.
c) Ammonia monitoring has been changed to weekly.
The permittee has the option of contracting with the Cape Fear River Program to
perform the instream monitoring regime. Cyanide has been documented at high levels;
therefore, it is the Division's intent to gather additional data on this toxicant and leave the
permit requirement unchanged at this time.
If any parts, measurement frequencies or sampling requirements contained in this
permit are unacceptable to you, you have the right to an adjudicatory hearing upon written
request within thirty (30) days following redeipt of this letter. This request must be in the
form of a written petition, conforming to Chapter 150B of the North Carolina General
Statutes, and filed with the office of Administrative Hearings, Post Office Drawer 27447,
Raleigh, North Carolina 27611-7447. Unless such a demand is made, this permit shall be
final and binding.
Please take notice that this permit is not transferable. Part II, E.4. addresses the
requirements to be followed in case of change in ownership or control of this discharge.
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

This permit does not affect the legal requirements to obtain other permits which may
be required by the Division of Environmental Management or permits required by the
Division of Land Resources, Coastal Area Management Act, or any other Federal or Local
governmental permits may be required.
If you have any questions or need additional information, please contact Mr. Mark
McIntire, telephone number [phone], extension 553.
Sincerely,
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E.
cc: Central Files
Mr. Roosevelt Childress, EPA
Wilmington Regional Office, Water Quality
Permits and Engineering Unit
Facility Assessment Unit
Aquatic Survey and Toxicology Unit

Permit No. NC0023973
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
VHriOVHL POLLUTANT CLMNATION uCV.C.? Ci1•A
In compliance with the provision of North Carolina General Statute 143-215.1,
other lawful standards and regulations promulgated and adopted by the North Carolina
Environmental Management Commission, and the Federal Water Pollution Control Act, as
amended,
City of Wilmington
is hereby authorized to discharge wastewater from a facility located at
M'Kean Maffitt Wastewater Treatment Plant
NCSR 1117
Wilmington
New Hanover County
to receiving waters designated as the Cape Fear River in the Cape Fear River Basin,
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, II, III and IV hereof.
This permit shall become effective September 1, 1996
This permit and authorization to discharge shall expire at midnight on June 30, 2001
Signed this day July 22, 1996
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission

1
Permit No. NC0023973
SUPPLEMENT TO PERMIT COVER SHEET
City of Wilmington
is hereby authorized to:
1. Continue to operate the existing 12.0 MGD wastewater treatment facility consisting of an
influent recording flow meter, flow splitter box, dual mechanical screening units with
rn.......in»tnrnI.1 grit r..movaol, backup b^- scren, du^'i prim--;cl--i ficrs, dual hi gh atrickling
filters, dual secondary clarifiers, a short term activated sludge unit, screw type lift station, a
biosolids unit consisting of a belt press, storage and lime treatment facility, one flash mix
chlorination unit, one chlorine contact chamber, effluent recording flow meter, three anaerobic
sludge digestors, sludge holding facility, and automatically activated standby power located at
M'Kean Maffitt Wastewater Treatment Plant, NCSR 1117, Wilmington, New Hanover County
(See Part III of this Permit), and
2. Discharge from said treatment works at the location specified on the attached map into the Cape
Fear River which is classified Class SC waters in the Cape Fear River Basin.

ROAD CLASSIFICATION
PP.IMARY HIGHWAY
HARD SURFACE
LIGHT -DUTY ROAD, HARD OR
IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE CMC= UNIMPROVED ROAD = =
Latitude 34°09'54" Longitude 77°56'53"
Map # K27NW Sub -basin 03-06-17
Stream Class SC
Discharge Class 97% domestic, 3% industrial
Receiving Stream Cape Fear River
Design Q 12.0 MGD Permit expires 6/30/01
SCALE 1:24 000
0
1 MILE
0
1
7000 FEET
0 1 KILOMETER
CONTOUR INTERVAL 5 FEET
Wilmington South
NC0023973
New Hanover County
WWTP

A. ( ). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0023973
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
pischarge Limitations
Monthly Avg.
Flow 12.0 MGD
BOD, 5 day, 20°C** 30.0 m g/I
Total Suspended Residue** 30.0 mg/I
NH3asN
Fecal Coliform (geometric mean) 200.0 /100 ml
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Acute Toxicity***
Dissolved Oxygen
Weekly Avg. Daily Max
45.0 mg/I
45.0 mg/I
400.0 /100 ml
Monitoring
Measurement
Frequency
Continuous
Daily
Daily
Weekly
Daily
Daily
Weekly
Monthly
Monthly
Quarterly
Weekly
Requirements
Sample
Type
Recording
Composite
Composite
Composite
Grab
Grab
Grab
Composite
Composite
Composite
Grab
*Sample
Location
I or E
E,
E, I
E
E
E
E,U,D
E
E
E
E,U,D
*Sample locations: E - Effluent, I - Influent, U - Upstream at a point equidistant between the radio tower due North of the WWTP and the
northern end of the dredge spoil island immediately east of the outfall, D - Downstream at a point equidistant between the mouth of Barnards
Cr. and the southern end of the dredge spoil island immediately east of the outfall. The permittee has the option of contracting with the Cape
Fear River Program to perform the instream monitoring regime.
**The monthly average effluent BOD5 concentration shall not exceed 21 % of the respective influent value (79 %) removal and the monthly
average effluent Total Suspended Residue concentration shall not exceed 19 % of the respective influent value (81 %) removal.
*** Acute Toxicity (Fathead Minnow, 24 hr) No Significant Mortality at 90%; March, June, September, and December; See Part III,
Condition G.
The pH shall not be less than 6.0 standard units nor greater than 8.5 standard units and shall be monitored daily at the effluent by grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
•

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0023973
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall(s) serial number 001. (Continued)
Effluent Characteristics
Copper
Cyanide
Discharge Limitations
Units (specify)
Monthly Avg. Weekly Avg. Daily Max
Monitoring
Measurement
Frequency
Monthly
Monthly
Requirements
Sample Sample
Tug Location
Composite E
Grab E

Part III Permit No. NC0023973
G. 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 fathead
minnow, 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 March, June, September, December.
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 TGE3D. 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.

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NPDES WASTE LOAD ALLOCATION
PERMIT NO.: NC0023973
PERMI I EE NAME: City of Wilmington
FACILITY NAME: M'Kean Maffitt Wastewater Treatment Plant
Facility Status: Existing
Permit Status: Renewal
Major 'd Minor
Pipe No.: 001
Design Capacity: 12.0 MGD
Domestic (% of Flow): 97.2 %
Industrial (% of Flow): 2.8 %
Comments:
RECEIVING STREAM: the Cape Fear River
Class: SC
Sub -Basin: 03-06-17
Reference USGS Quad: K27NW (please attach)
County: New Hanover
Regional Office: Wilmington Regional Office
Previous Exp. Date: 6/30/96 Treatment Plant Class: Class 4
Classification changes within three miles:
none
Requested by:
Prepared by:
Reviewed by:
Mark McIntire
Ara
Date: 1/2/96
Date:
kir/l 11 geIV Date:
Modeler
Date Rec.
#
Drainage Area (mi2
) /vi7 Avg. Streamflow (cfs): - j %)
7Q10 (cfs) Winter 7Q10 (cfs) 30Q2 (cfs)
Toxicity Limits: IWC 90 %
Instream Monitoring:
Parameters Q O
is -
:
Upstream
Downstream_
y�5
ye
Chronic
Location 66c- 06,514eload
Location Sec-eka (-f cf
Recommended Limits:
-t'
Monthly
Average
Summer
Winter
Wasteflow (MGD): 12
12
BOD5 (mg/1): 30
30
NH3N (mg/1): monitor
monitor
DO (mg/1): monitor
-
monitor
TSS (mg/1): 30
30
Fecal Col. (/100 ml): 200
-
200
pH (SU): 6.0-8.5
6.0-8.5
Residual Chlorine (µg/1): monitor monitor
- TP (mg/1): monitor
monitor
TN (mg/I): monitor
monitor
Daily
Max.
Copper (ug/l): monitor
Cyanide (ug/I):
monitor
p u;TTED
Comments: Toximoni4>red
i,)dI e.c n-ii 71.0 �� m.�n��-or�d jrr. L r°

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MAY-02-1996 15:21 FROM DEM WATER QUALITY SECTION TO
WIRO P.02/07
Facility Name:
NPDES No.:
Type of Waste:
Facility Status:
Permit Status:
Receiving Stream:
Stream Classification:
Subbasin:
County:
Regional Office:
Requestor:
Date of Request
Topa Quad:
FACT SHEET FOR WASTELOAD ALLOCATION
Request #
M'Kean Maffitt WWTP
dustrial
City of Wilmington -
NC0023973
97% Domestic, 3% In
Existing
Renewal
Cape Fear River
SC
03-06-17
New Hanover
Wilmington
Mark McIntire
1/2/96
K27NW
•
8416
5tzelir .cltgacteristic; 'TIDAL
USGS #
Date:
Drainage Area (mi2):
Summer 7Q10 (cfs):
Winter 7Q10 (cfs):
30Q2 (cfs):
Average Flow (cfs):
IWC (%): NA
NA
NA
n
Wasteload Allocation Summary
(approach taken, correspondence with region, EPA, etc.)
Since this is a renewal at the existing flow, no changes are recommended for conventional pollutant
limits at this time. Based on evaluation of effluent data, some changes are recommended in regard
to monitoring for toxicant parameters. Due to the difficulty in determining the degree of mixing
and appropriate dilution for this discharge, prior to the next renewal or any upgrade/expansion of
the plant, the City should conduct a study in conjunction with DEM to support the necessary
modeling to determine the diffusion pattern and degree of dilution, It should be noted that all
toxicant data from both Wilmington WWTPs is reported without '<' symbols to denote values
below quantitation limits. This matter should be raised with the permittee and corrected as soon as
possible in order to allow more effective evaluation of toxicant data. Addition of instream
monitoring is also recommended for this renewal. Please see Special Instructions or Conditions
section.
Special Schedule Requirements and additional comments from Reviewers:
Recommended by:
Reviewed by
Instream Assessmen
Regional Supervisor I C U k t'v V r—
Pernits & Engineering:
RETURN TO TECHNICAL SUPPORT BY:
Daze: - 1 L--t -c-'i 6
ate: s�2��9

2
Existing Limits:
Wasteflow (MGD):
BOD5 (mg/1):
NH3N (mg/1):
DO (mg/1):
TSS (mg/1):
Fecal Col. (/100 ml):
pH (SU):
Residual Chlorine (µg/1):
TP (mg/1):
TN (mg/1):
Recommended 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):
TP (mg/1):
TN (mg/1):
CONVENTIONAL PARAMETERS
Monthly Average
Summer Winter
12 12
30 30
monitor monitor
monitor monitor
30 30
200 200
6.0-8.5 6.0-8.5
monitor monitor
monitor monitor
monitor monitor
Monthly Average
Summer Winter WQ or EL
12 12
30 30 EL
monitor monitor
monitor monitor
30 30 EL
200 200 EL
6.0-8.5 6.0-8.5 EL
monitor monitor
monitor monitor
monitor monitor
Limits Changes Due To: NONE Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Relocation of discharge
Change in wasteflow
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations/standards/procedures
New facility information
(explanation of any modifications to past modeling analysis including new flows, rates, field data,
interacting discharges)
(See page 4 for miscellaneous and special conditions, if applicable)
Type of Toxicity Test:
Existing Limit:
Recommended Limit:
Monitoring Schedule:
WHOLE EFFLUENT TOXICITY TEST
Acute (Daphnia pulex) 24 hr.
Quarterly NSM, P/F @ 90%
Renew with existing limit.
Mar., Jun., Sept., Dec.

3
TOXICS/METALS
Existing Limits
Daily Max.
Chromium (ug/1): monitor
Copper (ug/1): monitor
Nickel (ug/1): monitor
Lead (ug/1): monitor
Zinc (ug/l): monitor
Cyanide (ug/l): monitor
Silver (ug/1): monitor
Recommended Limits
Chromium (ug/1):
Copper (ug/l):
Nickel (ug/1):
Lead (ug/1):
Zinc (ug/1):
Cyanide (ug/l):
Silver (ug/1):
Daily Max.
**
monitor
**
**
**
monitor
**
** Parameter will continued to be monitored quarterly throuh
Li !' COYGti L hAC i4'Ytuis. &WU I �.J U . 14PA mat U Yw� t' i Y�
Li' s g
imChanges �t/1Due To: Parameter(s) Affected
Change in 7Q10 data
Change in stream classification
Evaluation of toxicant data X Cr, Ni,Pb, Zn, Ag
Change in wasteflow
Other (onsite toxicity study, interaction, etc.)
Instream data
New regulations/standards/procedures
New facility information
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
X No parameters are water quality limited, but this discharge may affect future allocations.
INSTREAM MONITORING REQUIREMENTS
Upstream Location: A point equidistant between the radio tower due north of the WWTP and the
northern end of the dredge spoil island immediately east of the outfall.
Downstream Location: A point equidistant between the mouth of Barnards Cr. and the southern
end of the dredge spoil island immediately east of the outfall.
Parameters: Temperature, Dissolved Oxygen
Special instream monitoring locations or monitoring frequencies:
Instream samples should be collected at mid channel, unless otherwise specified. (Monitoring is
consistent with requirements for New Hanover Co. -Airport WWTP.)

%yer
DuPont
CP&L- Sutton
Leland Industrial Park
Navassa
Occidental Chemical
Ammons North Chase
NE Cape F
New Hanover Co. Landfill
General Electric
Fortron Industries
Hoechst Celanese
Arcadian Fertilizer
Wilmington-Northside WWTP
Wilmington-Southside WWTP
Beau Rivage Plantation
Wrightsville
Beach
Cape Fear Estuary
Wilmington Area
Vicinity Map
LEGEND
DEM Ambient Stations
NPDES Discharges
Major Roads
RiverslStreams
Municipalities
Scale (Miles)
6 Miloa
N 11:11
DEHNR

4
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
Upon renewal, the permit should contain the appropriate language exempting the facility from
instream monitoring requirements as long as their participation in the Cape Fear River monitoring
coalition is maintained, and the coalition continues to fulfill the monitoring requirements stipulated
in the Memorandum of Agreement.
Wasteload sent to EPA? (Major) (Y or N)
(If yes, then attach updated evaluation of facility, including toxics analysis, modeling analysis if
modeled at renewal, and description of how it fits into basinwide plan)
Additional Information attached? (Y or N) If yes, explain with attachments.
1. Map of vicinity
2. Toxicity test fact sheet.

Facility Name cam), l�r,; n q-�� - Sax/ �s�d e- 1,3WP Permit # A 3' 73 Pipe # O61
v
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 Daphnia pulex 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
beormed Ater thirty days from the effective date of this permit during the months of
Mar. �un. f. Qe. .
1 1
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 TGE3D.
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 chemica]/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 cfs
Permitted Flow 1a MGD
IWC AM %
Basin & Sub -basin O3-D4—/7
Receiving Stream Caps Fe0 r Qi d e. r
County Ales a h ave.('
Recommended by:91elt- e
•
Date 5' 1 14
QAL PIF pulex 24 Version 9/91

State of North Carolina
Department of Environment,
Health and Natural Resources
James B. Hunt, Jr., Governor
Jonathon B. Howes, Secretory
Steven J. Levitas, Deputy Secretary
Division of Environmental Management
Water Quality Section
P.O. Box 29535
Raleigh, N.C. 27626-0535
FAX:[phone]
FAX TO: 04qe- 4a'k'�
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FROM: f Sayi Qoli
PHONE: [phone]
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State of North Carolina
Department of Natural Resources and Community Development
Division of Environmental Management
512 North Salisbury Street • Raleigh, North Carolina 27611
James G. Martin, Governor R. Paul Wilms
S. Thomas Rhodes, Secretary May 6, 1987 Director
Mr. John Bauer
Director of Public Utilities
P.O. Box 1810
Wilmington, NC 28402
Dear Mr. Bauer:
This letter is to confirm information that a member of my staff,
Trevor Clements, relayed to you by telephone. As you know, it is dif-
ficult to estimate an instream waste concentration (IWC) for facilities
in the lower Cape Fear Basin due to the effect of tides on water move-
ment. In your case, calculation of the IWC for the two Wilmington
facilities is further complicated by stream regulation in the upper
basin and by diversion of water in the lower basin via the Brunswick
River. The best method for estimating an IWC for your two facilities
would involve the use of fluorescent dye studies to measure tidally -
averaged dilution of the effluent in the receiving waters. You may
want to consider performing this type of study sometime in the future.
For your immediate need regarding the headworks analyses for the
Northside and Southside plants, it is recommended that you use the
following information:
IWC Qw x 100
7Q10 + Qw
where: Qw = Effluent Flow (cfs)
7Q10 = lowest 7 - consecutive day flow
w/ probability of occurring 1 in 10 years
IWC = Instream waste concentration (%)
Pollution Prevention Pays
PLO Banc 27687, Rsle{gh, Nord, Cardin 27611-7687 Telephone [phone]

For the Northside facility:
Qw = 8 MGD a 12.4 cfs
reg. 7Q10 1121 cfs @ Navassa
- 448 cfs diversion Brunswick River (assumed 40%)
+ .28 cfs NE Cape Fear River
701 cfs
IWC a 12.4 x 100 = 1.7 percent
701 + 12.4
For the Southside facility:
Qw
12 MGD = 18.6 cfs
reg. 7Q10 s 1121 cfs @ Navassa
+ 28 cfs NE Cape Fear River
1149 cfs
IWC = 18.6 x 100 = 1.6 percent
1149 + 18.6
Therefore, our best estimates as to the IWC's for the Northside and
Southside Wilmington facilities are 1.7 and 1.6 percent, respectively.
These estimates might be considered since they do not account for tidal
mixing. However, they do include credit for all of the estimated freshwater
flow which is not conservative given the width of the river and the side -
stream location of each discharge. Therefore, these estimates should be
used with care and with full acknowledgement of their uncertainty. DEM is
recommending them for use in your headworks analysis. At this point in
time, we are not recommending them for use in determining whole -effluent
toxicity limits.
If you have any questions regarding this matter, please call either
Trevor Clements or myself (919/733-5083).
Sincerely,
..tkn'tijOr.;70:a
IsteVe IP =TeBdeitrite d 'Technical Services Branch
SWT:gh
cc: Preston Howard
Trevor Clements
Ken Eagleson

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Wilmington Southside Ambient
STATION: 02108757
CAPE FEAR RIVER @ MARKER #50 NR WILMINGTON
DATE
TEMP
DO
%SAT
BODS
%SAL
COND
Pb
Chloride
01/13/88
5
11.8
92.4
1.7
3
3780
1400
02/01/88
7
11.5
94.8
1.2
1
829
300
03/01/88
10
9.5
84.2
0.8
6.5
9100
1900
04/05/88
18.8
8.7
93.4
1.4
5
7000
290
05/03/88
18
7.4
78.2
2
8
12500
5500
06/06/88
23
6.3
73.5
2.6
12
14560
5300
07/11/88
28
5.9
75.4
2.5
11
17100
6800
08/04/88
28
4.2
53.7
0.9
1
1710
6
09/14/88
27
5.5
69.0
2.6
4
8160
2700
10/10/88
20
7.1
78.1
1.7
5
11000
7000
11/03/88
16.2
7.2
73.3
0.8
8
12936
7800
12/06/88
12
8.8
81.7
0.2
5
6300
4600
01/18/89
10.5
9.2
82.5
1.3
4
5300
2400
02/06/89
12.6
9.1
85.6
1.2
8
12480
6500
03/16/89
10.4
9.7
86.8
1.2
116
14
04/13/89
13
8.6
81.6
0.9
0
372
76
05/15/89
19
6.7
72.3
1.4
100
14
06/08/89
26
5.2
64.1
2.3
5
1180
4700
07/11/89
30
4.4
58.2
1.1
5
8100
2500
09/12/89
27
4.2
52.7
1.7
10
16800
7
10/11/89
18
5.6
59.2
1.2
0
103
12
11 /01 /89
18
7.4
78.2
0.5
5
7980
1600
12/21/89
3.7
11.1
84.0
0
100
15
01/16/90
8
10.5
88.7
1.4
0
147
27
02/14/90
13
9.2
87.3
0.8
0
9920
550
03/13/90
15
9
89.3
1.4
1
2520
1100
04/05/90
15
7.3
72.4
1.2
0
108
15
04/24/90
19
7.4
79.8
0.6
2
4480
1000
05/30/90
25
5.1
61.7
2.6
5
8200
2700
07/19/90
29
4
52.0
1
10
16560
14000
08/28/90
30
4.6
60.9
2.7
6
9180
3000
09/19/90
26
4.8
59.2
1.1
16
24500
8800
10/29/90
17.1
5.5
57.0
1.3
2
2710
1000
11/15/90
15.5
6.6
66.2
1
5
7260
1400
12/18/90
13
9
85.4
7
12400
3900
01 /31 /91
8.2
10.1
85.7
2.5
0
314
86
02/21/91
12.8
9.7
91.7
2.5
3421
03/20/91
12.9
9.4
89.0
2
2360
04/24/91
17.8
6.1
64.2
0.9
2
1624
200
05/22/91
22.8
5.5
63.9
1
8
14094
5600
06/25/91
27
6.2
77.8
1.3
15
20640
7000
07/22/91
29
4.3
55.9
0.6
8
11040
<50
4100
09/04/91
25.7
4.5
55.2
1.5
5
7888
2600
10/21/91
17.7
6.6
69.3
1.6
10
17190
6400
11/20/91
14.5
8.3
81.5
0.8
10.5
16940
6700
01/02/92
10.2
10.3
91.7
0.8
12
18403
7300

Wilmington Southside Ambient
DATE
TEMP
DO
%SAT
BOD5
%SAL
COND
Pb
Chloride
01/22/92
8
10.3
87.0
0.8
5
7370
2300
02/20/92
11.5
9.7
89.0
1.4
10.5
16764
5600
03/24/92
13.8
8.7
84.1
3
6120
<10
2000
05/04/92
20
7.1
78.1
2
3630
<10
840
05/21/92
<10
4600
06/24/92
25.5
5.2
63.5
2
39600
<10
1100
07/30/92
30
4.5
59.6
16
24750
<10
7800
09/02/92
26
2.8
34.5
0
123
14
18
09/15/92
25
4.3
52.1
7.5
12200
<10
3700
10/07/92
19
7.1
76.6
11.5
18816
<10
6700
11/09/92
15
7.8
77.4
8.5
13320
<10
6000
12/15/92
8
9.5
80.2
0.8
1501
<10
1200
03/02/93
8
11.2
94.6
1.7
4044
<10
1300
03/23/93
10.4
10.5
93.9
0
45
<10
12
04/13/93
15.2
7.4
73.7
0
61
<10
8
05/20/93
23.9
6.4
75.9
6.8
12400
<10
4300
06/16/93
28
5.6
71.6
15
23000
<10
7900
06/16/93
230000
07/20/93
30.2
5.1
67.7
17.3
28300
<10
10000
08/30/93
29.4
6.9
90.4
16.2
26500
<10
9000
09/21/93
26.5
3.6
44.8
11.6
19400
<10
9300
10/19/93
21.1
6.7
75.3
16.2
26600
<10
10000
11/02/93
15.5
8.8
88.2
12
19700
<10
6000
02/23/94
11.4
10.3
94.3
6.3
11090
<10
3800
03/16/94
12.8
8.3
78.4
0
122
<10
16
04/13/94
19.1
7.3
78.9
2.1
3770
<10
1200
06/01/94
23.3
6
70.4
14
23200
<10
7200
06/22/94
29.2
5.8
75.7
13.2
22000
<10
8100
08/02/94
27.9
4.4
56.1
5.4
9500
<10
2800
08/22/94
27.6
5.2
66.0
4.8
8490
<10
2000
09/12/94
24
4.7
55.8
0.7
1500
<10
470
10/05/94
22
5.2
59.5
13
21200
<10
7600
12/07/94
15.1
7.2
71.6
3.6
6500
<10
2000
12/29/94
10.6
8.6
77.3
3.9
6940
<10
3500
01 /31 /95
7.6
9.4
78.6
2.7
4970
<10
1400
03/06/95
10.9
8.7
78.7
0
95
<10
12

WHOLE f3 717.UI33NT•!'OXICaI'Y TITS ING OISL:LF-MONITORING SUMMARYI Wed. Apr 17. 1996
1VIlnrbiglun Corp. Industrial 1VW1'S' PERM ('1 Ilt I.IM: 34%
NC0000817/001 Begin:3/1/94 I m uency: () 191' A Mar Jain Sep Ike
▪ Courtly: Ncw Itancwct Region: WIIU) Suhha%iu: CP1:17
PIr: 0.10 Special
71)10:0.Jn IIV('('A4 14.01 rink•.
Wliutinglun Narti:Ade 1V'V'1T PIOIM ('111( I.IM: 1.7%
NC00231965/001 Dcgiu:9/1/91 Frequency: Q I'll: A Pell May Aug Nov
County:New Ilii:lovct Region: WIR() Suhhasin: ('P1'17
PI': 8.00 Special
7Q10: 701.0 . I Wc(%):1.73 Order:
O? --•
Non(:my:SIN(il.l? i13 ...
94 ---
95 ...
u)l
111N
NI
Puss
Pass
Pass
M rramp:
Wilmington Shipyard. Inc 1'l RM: 241112 I'/i: AC MONI'I' 1?I'IS I:1'11,) (GRAD)
N('00680041/001 Begin: 12/I/92 1'nt)uency:OW1) NunCump:
Coualy: New 1lauuvrr Region: WIR( Suhbasin: CP1:17
VAR1 f1) Sttecial
7010:111)Al. IW('(%):NA (rnkr.
Y 11? •••
UJ -•-
94 --
95 ---
OG ...
02
93
94
O5
110
Puts.
I'uNa
Pass
Paso
Pass
fang
Pints
Pass
Pass
I'.tnt,
fuss
NIVPnss
Pass
Pass
Pugs
Pass
Pass
Wilmington Soulbxidc. 1V1V'I'i' I'1:RM 24111t I'/1: A(' 1.IM:')O% DAI'il
NC0023973/001 Degin:9/I/9I I'11Yiucltay: O A Mar Jun Sep Ike Non('ntttp:
('uunty:New 1lantm7 Region: Will() Srhlutsin: CP1:17
PP: 12.00 Special
7Q10: 1149 11VC(%):1.59 Omer
Y 92 -.
03 -•-
04 ••-
05 ...
96 ---
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pnssl
Pass
Fail
Pass
Pass
Pass
Pass
Pass
Pass
Pass
Pass
%Yilsan 'Technical Commun(ly Cullcgc Pratt: 2419 I.( :S9 ;n in nil epic Mill (crib)
NI'M1114111I/001 Ile gist:'NI /95 I:nvlur;.•y: 5 (IWl )IA
('.nosily. Wd►nu Uric .ar 141111 S.s1,lmw. NIt1111/
1'1': 0.914.1 tip.rr rat
1U ID: 0.0 I W('('Jt.):118) t ►nler:
11'ilsott W1V'TI' PIIRM ('Illt I•IM:'J0%
NCOO23906d001 flegin:9/IP)4 I'mgw•ncy: O PIP A Felt May Aug Nov
County:Wilson Region: It12O Subl.asin: NI:(101
I'P: 12.0 Special
7Q10: 0.500 IWC(97.37 flak.:
11'lnslsor 1V%V'1'1' I'li1tM (lot I.IC11,'10'><•
NC0016751/001 Degin:M/1/9.1 l iequency: O I91' A Jan Api Jul WI
Colunty:Beak Region: WAR() Sulthasin: RUA 10
I'1': 1.15 Special
71)10: 0.0 I1V('('1i.):1(AO t later:
IVirtslutt-Snlerst Archie l:licrlge %YWTI' Perna 11.2 {'lie litre 769{•
N(:00371134R)OI Dcgin:5/26195 1'atlwncy: Q Jan Apr Jul Do
(:aunty:Vrusyth Region: WSRO Suhhaain: YAI)0I
P1': 30 Special
7010: 15.0 I W (:(%): 75.6 Order:
N.nst'utup:
92
113
114
9:,
9(1
Nont' p:\IN(:I.I:
92 --
03 ...
94 •••
95 ---
Fails •
Pass
l 11111,1 all
Puss(a)
Fa;7(s)
Fail Paas.Fai1 Pass
. ... NIl/Fnil Fnil Pass
l'oesa Pass ••• ...
.•. Puss
Fail
Pass
1.11111.1, tits 111
Pass
Pass
Pass
Feel
Pass(*)
Pass.
Nuo('uasp:SINI II.I?
112 I'.,nt1
ua 1Insn
94 Pass
05 Pass
u9 I'nsn
Pnnn
1nd
Pass
Fmk
NIU• I'n+re
Fa;7
Pass
Pons
lad
N04 ad
NI
1od
Fail
Puss
.svita
Liao
f�rtil
fence
Pass
Pass
Pit
Pass
Nor(:i mp:I'lir Avg
Winston-Salem Lower Muddy Crk font 1'•2 elm* lint: 4.0%; if pf 2IMO) P•2 rhr lint 5.5'%•
NCOOSO3.12/001 Dcgin:5/26/95 Vw ucsuy: Q Jun Apr Jul Oct NunComp:( lir Avg
('aunty: Forsyth Region: W1RO Subbasin: YAI)01
1'1:: 15.0 Special
7010: 554.0 I W('(%):4.02 Order:
Woodlin Sanitary Water & Sewer Penn clir lint: 8%
N00083178IO01 Begin: 10/1/95 Pnqucacy: Q P/P A tan Apr Jul Oct
County:Buncombe Region: AR() Subbasin:1121302
I'F:.0.1375 Special
11)10: 11.r.1 !MITI M II f1.114:
U2
93 >90
U4 <11)
95 >90
96 >96
54
27
53.7
>▪ 90
2/
>90.>00
01
27
>06
21
27
>90
54
2/
2/
<ID
>96
26.0
91
>U0
92 Pass
93 >10
04 5.0
05 11.3
06 >10
Pass
>16
>10
>16
>16
>10
>16
>16
>16
>10
>16
>16
NunCump:Single
Werth Chemical Corp. . PP.RM ('111t 1.1M: 2:'%• (IMAM (New swag 4/1M6)
NCl/078000/00I Degin:11/2 /9.1 1'w pten y: Q I'll' A Jail Apr Jul Oct Nnu('ump:
County:(iuitford Region:WSR() Suhhasin:('I'l02
P1:: 0.216 Special
7Q10: 1.2 IW(:(%):21.8 U1dcr:
02 »-
93 ---
S4 --•
95 N
on 1'
N N
N
Lalo
PUSS
1)? ••-
0:t Pass
94 Pass
9a Puss
96 Pass
Pass
Pass
Pauu
Pans
Pass
Puna
Pass
Pass
Pass
0 : rtnsrt•ulivc Nauru.. siimit-must nnnromplinmt•
1'IIRM . Moult Rattuirt nxtnt 1.1 T to 1ldministrativr letter-'1'arp;ct Irrriucocy a Monitoring fnqucnry: Q. Quarterly: M. Monthly; DM- Bimonthly: SA- Semiannually: A. Annually: ()WI)-()slywhen discharging:1). Discontinued monitoring requirement; IS• Conducting independent study
Begin a 1•iist extents rewired 7Q 10 a Receiving stn nm low flow cnleriom (crs) 0 !t)sIrlC.vt1 waste twncrnllalian
Nor z Permitted flow (MGD) IWt„�t. o I uarterly nittuing increases to muntlily upon single failure Months Mal lesting.n;ust occur • ex. JAN.APRJIII.,(H'I' NonCunrp . ('urn it (:ompliwicu Requirement
t: PA: a I1ulu
rarl chronic test A(' . Aculc CI Ili = (Ironic
1 N.ver...w. f • , ...k.
Y Po.fell. I )a1n Available
ad M:arrow. • - Cecinaarhtua so.: my • Mvsid aluinm; ('IiV • (luunic value: P - Moxtality of stated orfrealaac at highest conccnlratkn: al • Perforated ISY 1)1 1•oa Itaal Chow: bt • Dad real
Reporting Natalioa: ••• a pain ntt requited: NR • Not reported: ( ) - Iles:m ing of Quar(cr 11urilily Aelivily Stales: I • lnac(ivc. N • Newly tsstnt!I o construct); I1 • At'tivc lag not tag: t•Mttic dala avail:kb for naxa!: in question
,_ .. ss•._-._-.,.:��..:.� Yam_ .. _
•
...1,�5�'.�.f".L~��"n•5�+:"1`�2•+'' ' i`. '�1�r$�}+{ii"'Q..,. ,,��.'"
Pass
1 a ()RC signature rntdttl

*** MODEL SUMMARY DATA ***
Discharger : HAW RIVER PLANTATION
Receiving Stream : HAW RIVER
Summer 7Q10 : 0.3
Design Temperature: 26.
Subbasin : 030601
Stream Class: WSIII-NSW
Winter 7Q10 : 1.4
! LENG! H I SLOPE! VELOCITY 1 DEPTH! Kd 1 Kd 1 Ka 1 Ka 1 KN 1 I':N 1 KNR 1 KNR
mile 1 ftimiil fps 1 ft Idesignl ;21f' Idesignl 320' !design! 820' )design) ;206
1 1 1 1 1 I 1 I 1 1
Segment 1 1 0.781 7.781 0.100 1 0.68 1 0.30 1 0.23 1 1.60 1 1.401 0.48 1 0.30 1 0.48 1 0.00
Reach 1 1 1 I (p, oVi)
1 ! 1 1 1 1 1 ! ! 1 1 1
tip:,plant ! 1 1.441 7.781 0.100 1 0.74 1 0.30 ! 0.23 11.60 1 1.401 0.48 1 0.30 i 0.48 10.00
Reach 2! 1 ! In;e.) ! ► 1 1 1 1 1 1 • 1
1 1 1
Segment 1 1 2.161 7.781 0.100 1 0.85 1 0.29 1 0.22 1 1.60 1 1.401 0.48 1 0.30 ! 0.48 1 0.00
Reach 3 1 I i CO, Deo) I I 1 ! 1 ! 1 I I
1 1
Segment 1 1 0.901 11.111 0.102 1 0.90 1 0.30 1 0.23 1 2.32 1 2.041 0.48 1 0.30 1 0.48 1 0.00
Reach 4 1 I 1 I I I 1 1 1 1 !
1 Flow 1 CBOD 1 NBOD 1 D.O. I
1 cfs 1 mg/1 1 mg/1 I mg/1 I
.Segment 1 Reach 1
Waste 1 0.388 1 16.500 1 13.500 I 5.000
Headwaters! 0.300 1 2.000 1 1.000 1 7.300
Tributary I 0.000 1 2.000 1 1.000 1 7.300
* Runoff I 0.000 1 2.000 1 1.000 1 7.300
•
Segment 1 Reach 2
Waste I 0.000 I 0.000 1 0.000 1 0.000
Tributary I 0.075 1 4.000 1 3.000 1 7.300
* Runoff I 0.087 1 2.000 1 1.000 I 7.300
Segment 1 Reach 3
Waste 1 0.000 I 0.000 I 0.000 I 0.000
Tributary 1 0.075 I 2.000 1 1.000 1 7.300
* Runoff 1 0.104 1 2.000 1 1.000 1 7.300
Segment 1 Reach 4
Waste I 0.000 1 0.000 1 0.000 1 0.000
Tributary I 0.000 1 2.000 1 1.000 I 7.300
* Runoff I 0.104 1 2.000 1 1.000 I 7.300
* Runoff flow is in cfs/mile

Wilmington Southside Ambient
STATION: 02108736
CAPE FEAR RIVER @ MARKER #55 AT WILMINGTON
DATE
TEMP
DO
%SAT
BOD5
%SAL
COND
Pb
Chloride
02/01 /88
7
11.2
92.3
1.3
0
177
28
03/01/88
10
9.2
81.5
0.7
7
7800
2500
04/05/88
18
7.9
83.5
1.3
5
5700
<10
1600
05/03/88
18
6.3
66.6
1.1
5
10260
3700
06/06/88
23
5.3
61.8
1.7
6
7420
2800
07/11/88
28
5.6
71.6
1.8
9
14570
<10
6000
08/04/88
28
3.7
47.3
1.1
0
330
9
09/14/88
27
5
62.8
2.3
4
6720
23000
10/10/88
20
6.6
72.6
1.7
7
12100
<10
4800
11/03/88
16.3
6.6
67.3
1.1
5
8218
4500
12/06/88
12
8.6
79.8
0.4
6
7560
5
01/18/89
11
9.2
83.5
1.1
4
5200
<10
2400
02/06/89
12.6
8.9
83.7
0.7
7
12480
6100
03/16/89
10.3
9.6
85.7
1
116
16
04/13/89
14
8.5
82.5
0.8
0
109
<10
15
05/15/89
18
6.5
68.7
3.5
85
11
06/08/89
27
6
75.3
0.9
8
14800
2700
07/11/89
30
4.3
56.9
0.9
3
4500
<10
1600
09/12/89
28
4.2
53.7
1.7
6.8
12400
8400
10/11/89
19
5.4
58.2
1.4
102
<10
14
11 /01 /89
17
7.7
79.7
0.7
3
4830
3000
12/21/89
3.7
11.2
84.8
100
14
01/16/90
7.7
10.5
88.0
0.9
0
108
<10
14
02/14/90
13
9.7
92.1
0.8
159
30
03/13/90
14.5
9.2
90.3
1.1
0
544
1400
04/05/90
16
7.2
73.0
1
0
94
<10
13
04/24/90
18
7.3
77.1
0.2
2
3762
710
05/30/90
24
5.2
61.8
1.4
3
3970
1100
07/19/90
28
3.5
44.7
1.9
9
15510
<10
5300
08/28/90
30
3.7
49.0
0.8
5
5400
1500
09/19/90
27
4.5
56.5
1.2
14
21600
7900
10/29/90
17
5.5
56.9
1.1
1.9
2400
<10
860
11/15/90
15
6.4
63.5
0.9
4
5940
1200
12/18/90
12
9.1
84.5
5
8190
2800
01 /31 /91
8.3
9
76.6
1.6
0
123
<10
22
02/21/91
11.1
9.8
89.1
1
767
03/20/91
12.5
9.4
88.2
0
275
04/24/91
17.8
5.6
58.9
0.9
19.5
200
<10
35
05/22/91
23.1
5
58.4
0.9
7
12456
3700
06/25/91
25.7
4.9
60.1
1
12
15776
5000
07/22/91
29
3.8
49.4
0.6
5.5
8200
<50
2600
09/04/91
25.8
4.2
51.6
1.1
5
7872
2300
10/01/91
23.1
5.3
61.9
0.5
4
7058
2400
10/21/91
18.7
5.8
62.2
1.2
9
14638
<10
5400
11/20/91
13.7
7.9
76.2
0.7
6.5
11034
4100
01/02/92
10
9.8
86.8
1
7.3
11700
4300

Wilmington Southside Ambient
DATE
TEMP
DO
%SAT
BOD5
%SAL
COND
Pb
Chloride
01/22/92
8
10.3
87.0
0.7
2.5
4020
<10
1400
02/20/92
11
9.7
88.0
1.1
6.5
10496
3800
03/24/92
13.6
8.5
81.8
0.5
1719
<10
690
05/04/92
20
6.8
74.8
0
572
<10
140
05/21/92
<50
4100
06/24/92
26
4.9
60.4
2
38514
<10
1300
07/30/92
30
4
52.9
11.5
18450
<10
6100
09/04/92
26
2.6
32.1
0
118
<10
17
09/15/92
25.5
3.9
47.6
5.5
9108
<50
2700
10/07/92
19.5
6.5
70.8
9.1
14985
<10
5800
11/09/92
16.5
7.2
73.7
6.5
10764
<10
3700
12/15/92
8
9.6
81.1
0
466
<10
150
03/02/93
7.9
11
92.7
1
2718
<10
750
03/23/93
10.4
10.3
92.1
0
99
<10
13
04/13/93
16
7.1
72.0
0
60
<10
8
05/20/93
24
5.6
66.5
4.1
8300
<10
2800
06/16/93
28
4.6
58.8
12
18000
<10
7400
07/20/93
30.3
4
53.2
13.6
22700
<10
5100
08/30/93
29.5
4.8
63.0
13.2
22600
<10
7900
09/22/93
26.6
3.3
41.1
14660
<10
5800
10/19/93
21.1
5.3
59.6
13.2
22100
<10
8700
11/22/93
16.1
8
81.3
10.9
18500
<10
6200
02/23/94
10.7
10.5
94.6
4.2
7530
<10
2300
03/16/94
12.8
8.1
76.6
0
117
<10
13
04/13/94
19.3
7.3
79.2
0.9
1710
<10
450
06/01/94
23.3
5.7
66.8
13.6
22700
<10
7000
06/22/94
29.2
5.7
74.4
10.3
17500
<10
6600
08/02/94
27.6
5.5
69.8
3.9
7040
<10
2100
08/22/94
27.4
5.4
68.3
1.8
3310
<10
850
09/12/94
24
4.6
54.7
0.5
918
<10
290
10/05/94
22.5
4.8
55.4
10.5
17850
<10
6000
12/07/94
14.8
7.5
74.1
1.9
343
<10
990
12/29/94
10.6
8.7
78.2
1.8
3280
<10
870
01 /31 /95
7.3
9.9
82.2
0.7
13630
<10
310
03/06/95
11
8.8
79.8
0
100
<10
15
05/04/95
21.9
5.8
66.2
9.9
16800
<10
6400
06/20/95
25.3
4.2
51.1
0
111
<10
14

Maffit xics Data
DATE
CN
Cu
Pb
Zn
Ni
Cr
Ag
3/13/96
6
11
3
20
5
5
2
2/12/96
5
12
5
20
10
5
2
1/10/96
16
12
3
18
5
5
3
12/4/95
5)
10
3
17
5
5
2
11/6/95
6
8
5
12
10
5
2
10/11/95
7
8
2
13
5
5
2
9/13/95
5
6
6
11
5
5
2
8/1/95
15
8
3
20
5
5
2
7/12/95
5
5
3
10
5
5
2
6/13/95
5 L
9
3
20
5
5
2
5/1/95
5
12
3
20
5
5
2
4/5/95
5 i
12
3
25
5
5
2
3/6/95
5 i
12
3
18
5
5
2
2/13/95
5
11
5
25
10
5
2
1/11/95
5
13
3
25
5
5
3
12/7/94
5
13
5
23
10
10
2
11/16/94
5
11
5
23
10
10
2
10/3/94
5
7
5
15
10
5
2
9/12/94
5
9
5
18
10
5
2
8/10/94
5
9
3
18
5
5
2
7/14/94
5
7
3
25
9
5
2
6/8/94
5
8
3
20
5
5
2
5/4/94
5
11
3
20
5
5
2
4/6/94
5
12
11
20
5
5
2
4/11/94
5
11
5
19
10
5
2
3/2/94
5
17
3
40
5
5
4
3/21/94
5
15
3
20
5
5
2
2/9/94
5
16
3
25
5
5
3
1/5/94
5
14
50
24
10
10
3
12/8/93
5
10
50
22
10
10
3
11/2/93
5
6
50
16
10
10
2
10/13/93
5
7
50
17
10
10
2
9/8/93
5
6
50
16
10
10
2
8/6/93
5
6
50
23
11
10
2
7/8/93
5
8
50
29
10
10
2
6/22/93
5
8
5
16
10
5
2
5/7/93
5
15
50
34
10
10
3
4/7/93
5
14
50
43
60
10
2
3/3/93
5
10
50
34
10
10
3
2/10/93
5
10
50
27
10
10
2
1/13/93
5
12
50
60
10
10
5
Page 1

LONG TERM MONITORING PLAN REQUEST FORM rpipr
FACILITY: M'Kean Maffitt WWTP; Wilmington
NPDES NO.: NC0023973
EXPIRATION DATE: 6/ 3 0/ 9 6
REGION: WiRO
P&E REQUESTOR: Mark McIntire
PRETREATMENT CONTACT: Tom Poe
DATE OF REQUEST 1/2/9 6
INDICATE THE STATUS OF PRETREATMENT PROGRAM:
1) THE FACILITY HAS NO SIU'S AND SHOULD NOT HAVE PRETREATMENT LANGUAGE.
2) THE FACILITY HAS OR IS DEVELOPING A PREATREATMENT PROGRAM.
3) ADDITIONAL CONDITIONS REGARDING THE PRETREATMENT PROGRAM ATTACHED.
PERMITTED FLOW: Presently 12.0 MGD
% INDUSTRIAL 3%
% DOMESTIC 97%
Pretreatment I'nit Staff (Region)
Bo McMinn (WSRO)
T E), ARO, WiRO)
Dana Folley (RRO, WaRO)
�T�IR
(MRO
()--0-ikv-A''d
q(p mac,

M'Kean Mafftt WNWTP
NPDES NC0023873
Influent
LTMP DATA SUMMARY FORM
M'KEAN_MAFFITT_WWTP (SOUTHS
DE)
NPDES# NC0023973
PLANT INFLUENT
SAMLE DATE
FLOW MGD
Al.
NH3-N
As
Ba
BOD5
Cd
CI
Cr
COD
Cu
CN
Fe
Pb
Hg
Ni
O&G
Organic
T-PO4 .
Ag
TKN
TS
TSS
Zn
Mo
S
Se
0.009.00
0.00701
N
18-Feb-92
6.36
1.08
23.6
0.0015
0.105
260
0.010
322.0
0.0010
577
0.071
0.0380
1.670
0.0003
0.039
71.0
6.5
6.0
0.001
30.1
1173
252
0.192
19-Feb-92
6.36
1.36
24.4
0.0015
0.118
227
0.013
342.0
0.0010
574
0.069
0.0130
1.730
0.0001
0.032
49.0
6.8
5.7
0.001
31.2
1208
260
0.196
20-Feb-92
6.36
1.21
21.8
0.0015
0.115
208
0.013
351.0
0.0010
497
0.067
0.0430
1.840
0.0070
0.0011
0.035
54.0
8.8
4.7
0.001
30.6
1119
180
208
0.226
0.171
21-Feb-92
6.36
2.02
23.8
0.0015
0
0.126
144
0.011
330.0
0.0010
421
0.066
0.0280
1.370
0.0080
0.0004
0.048
47.0
8.0
5.8
0.001
31.8
1061
22-Feb-92
6.36
1.81
22.0
0.0015
0.153
217
0.009
315.0
0.0010
450
0.065
0.0390
2.630
0.0070
0.0060
0.0009
0.063
57.0
6.8
4.9
0.001
28.8
1098
192
0.157
23-Feb-92
6.36
2.44
22.0
0.0015
0.139
233
0.010
322.0
0.0010
538
0.082
0.0050
5.930
0.0003
0.073
44.0
9.2
5.7
0.001
31.2
1158
216
0.173
21-Jun-93
7.289
2.10
22.2
0.0015
0.090
315
0.001
201.0
0.0025
451
0.105
0.0025
1.500
0.0090
0.0007
0.005
65.0
11.7
6.1
0.020
33.9
924
288
0.140
22-Jun-93
7.348
1.65
19.3
0.0015
0.070
189
0.001
194.0
0.0025
377
0.085
0.0025
1.100
0.0070
0.0007
0.005
54.0
7.6
5.3
0.011
26.9-1
755
156
0.090
23-Jun-93
� 7.332
1.10
21.2
0.0015
0.070
188
0.001
165.0
0.0025
406
0.080
0.0025
0.950
0.0080
0.0009
0.005
64.0
8.6
6.9
0.012
29.8
761
156
0.105
21-5e
7.483
1.05
19.3
0.0015
0.065
175
0.001
203.0
0.0025
363
0.060
0.0025
0.800
0.0060
0.0005
0.005
47.0
8.3
5.2
0.012
27.6
801
140
0.090
_93
_ 22-Sep-93
23-Sep-93
__ - 25-Oct-93
i 26-Oct-93_
7.285
1.30
17.2
0.0015
0.065
180
0.001
181.0
0.0025
378
0.080
0.0025
1.100
0.0060
0.0005
0.005
52.0
9.2
5.5
0.013
26.4
789
148
0.110
7.302
1.55
20.4
0.0015
0.080
163
0.001
165.0
0.0025
310
0.070
0.0025
1.000
0.0060
0.0004
0.005
34.0
9.4
5.3
0.014
29.8
822
132
0.100
_
7.653
- 8.049
1.07
_ -1.75
_ 1_9.9_
15.7
0.00150.0
030
_ _0.035
0.055
190
144
0.001
0.001
170.0
0.0025
380
0.060
0.0025
0.750
0.0060
0.0001
0.005
39.0
10.6
5.8
0.022
30.5
741
108
0.075
156.0
0.0025
268
0.070
0.0025
1.100
0.0060
0.0001
0.0001-
0.005
0.005
26.0
9.7
4.8
0.020
25.4_
760
104
0.100
27-Oct-93
8.913
0.83
17.6
0.0015
0.035
190
0.001 177.0
0.0025
397
0.450
0.0025
0.900
0.0025
26.0
8.8
4.9
0.013
26.4
738
132
0.055
• _ _ 21-Mar-04
Ti-Apr-94_
12-Sep-94
3-Oct-94
_ 7.475
_- - -7.4_53
1.50
1.60
27.0
0.0025
0.0015
0.0030
0.0015
_0.0015
0.0025
0.0025
_0.0015
- 0.041 _
23
0.002
0.055
0.050
248
0.001 117.0
0.0025
493
0.070
0.0025
0.980
0.0060
0.0001
0.0001
0.005
46.0
7.0
4.3
0.011
34.0
831
208
0.100
0.0025
0.0015
22.2
198
0.001 112.0
0.0025
419
0.075
0.0025
1.150
0.0050
0.005
49.0
8.9
7.8
4.7
5.8
0.014
31.1
765
144
0.155
0.0500
0.0050
._ 8.013
__ 8.43
8.518
_-__.- ___7.523
8.428
_ __. 8.483
171.137
_ 23
- - 7.44
8.913
.
____ ____ 6,36
0.80
1.50
0.80
- 135
__ __1.60
1.20
-_1.50
33.37
23
1.45
2.44
__ _ 0.80.
0.40
22.5
21.7
_ 18.7
23.2
22.9
_ T22.7
_ 491.3
23
21.4
0.075
0.040
0.0_55
0.075
0.070
_0.060
1801
23
0.078
0.153
__0_
0.033
220
215
0.001
0.001
122.0
181.0
0.0025
360
0.090
0.0025
1.100
0.620
0.500
_ 0.0025
0.0025
0.0025
0.0060
0.0050
_0.0050
0.135
_ _ _23
0.006
0.009
_____09
_ 0.003
0.002
0.0001
0.0001
0.005
0.005
33.2
0.009
25.2
800
164
0.150
0.075
0.0050
0.0050
0.0025
285
0.060
0.0025
` 24.4
9.1
5.6
5.0
0.012
30.8
907
220
0.0500
0.0050
13-Feb -95
- - 1-May-95
1-Aug-95
7-Nov_-95
Total__ _
it -Values _ __
Avera e _ +^
g _ -
Maximum
Minumum __ __-
Std. Dev.
167
0.001
0.001
0.001
0.001
0.00831
23
105.0
113.0
169.0
_ _ 132.0
4645.0
23
202.0
351.0
,_51.0---------.
_ 105.0
83.2
0.0025
352
0.070
0.0025
0.0005
0.0003_
0.0001
0.0001
0.005
0.007
0.003
0T005
25.2
22.2
35.3
32.2
9.2
0.008
0.014
0.012
0.007
27.9
32.0
31.3-1
31.7
684.4
23
29.8
- _
_ ...
34.0
25.2
709
144
0.100
0.0500
0.0050
268
240
_ _ 202
4781
23
0.0025
426
0.080
0.0025
1.300
8.8
8.4
9.0
5.3
4.8
5.4
803
701
24 7
160
0.110
0.0025
0.0025
0.0025
0.0025
_ 0.049
_�23
0.002
0.003
0.001
0.001
402
_ 311
0.070
0.075
0.0025
0.0025
1.230
.._1.700
180
136
0.110
0.095
0.0025
000
.05.0050
0.2125
8
0.0250
0
0.0540
_ 9435
--_23
410
577
_ _ 268
84
2.070
_ , 23�
0.090
0.450
..__.
_ 0`060
0.079
0.2085
_ 23
0.0091
0
0.0430
__-.043_.
_0.0025
0.0135
32.950
_ -23
1.433
5.930
__5__--
_ _0.500
1.086
0.0085
__ 23
0.0004
0.0011
---.-..._�_..__.__
_0.0001
0.1003
0.375
23
0.016
..._..._._._._
0.073
.._.
0:003
• 0.021
996.5
23
43.3
.._...._.__
71.0
_. - ____-6.1
_ 22.2
14.1
198.2
23
8.6
11.7
._ __
__ 6.5_-
1.2
23
5.4
6.9
__6.9
4.3
0.6
0.230
23
0.010
0.022
-_. _
0.001
0.006
20148
23
876
_ - _
1208
701
4028
2.875
23
23
8
208
315
--._.--_
__ 144
41
0.004
0.013
_ 0.001
0.005'
175
_ _
288
104
49
0.125
�0--_---
0.226
0.055
0.045
0.0266
._�_6
0.0500
0.0025
0.0251
0.0068
_--.-_
0.0250
_ OA015
0.0075
27.0
_ -15.7
2.6
0.003
- 0.002
0.001
2.5
169
When sampling revealed <DL
1/2 detection limit used.
Page 1
4

M'Kean Maffitt WVVTP
NPDES NC0023973
Final Eff
LIMP DATA SUMMARY FORM
M'KEAN MAFFITT WWTP (SOUTHSIDE)
NPDES# NC0023973
FINAL EFFLUENT
SAMLE DATE
FLOW MGD
Al.
NH3-N
As i
Ba
BOD5
Cd
CI
Cr
COD
Cu
CN
Fe
Pb
Hg
Ni
O&G
Organic
T-PO4
Ag
TKN
TS
TSS
Zn
Mo
Se
N
18-Feb-92
6.7
0.30
10.8
0.0015
0.037
11
0.009
313.0
0.0010
51
0.008
0.0025
0.280
0.0010
0.0001
0.024
22.0
1.0
3.8
0.001
11.8
870
11
0.118
19-Feb-92
6.7
0.28
10.8
0.0015
0.036
10
0.010
323.0
0.0010
74
0.008
0.0270
0.540
0.0010
0.0002
0.032
11.0
1.0
3.5
0.001
11i.8
855
7
0.286
20-Feb-92
6.7
0.22
10.3
0.0015
0.028
11
0.008
345.0
0.0010
111
0.020
0.0250
0.850
0.0010
0.0001
0.034
3.0
0.9
4.1
0.001
111.2
1138
6
0.149
21-Feb-92
6.7
0.50
11.0
0.0015
0.046
8
0.009
330.0
0.0010
76
0.012
0.0270
0.730
0.0020
0.0001
0.028
0.0
1.6
4.6
0.001
12.6
974
7
0.048
22-Feb-92
6.7
0.56
10.3
0.0015
0.042
11
0.006
313.0
0.0010
70
0.016
0.0025
0.410
0.0020
0.0001
0.024
15.0
2.6
4.0
0.001
12.9
1082
5
0.070
23-Feb-92
6.7
0.44
11.8
0.0015
0.040
10
0.008
352.0
0.0010
70
0.013
0.0025
0.320
0.0020
0.0003
0.030
0.1
1.1
4.0
0.001
12.9
864
7
0.051
21-Jun-93
7.289
0.07
0.2
0.0015
0.005
5
0.001
174.0
0.0025
33
0.008
0.0025
0.070
0.0025
0.0001
0.005
22.0
1.4
3.3
0.001
1.6
594
3
0.016
22-Jun-93
7.348
0.06
0.1
0.0015
0.005
6
0.001
174.0
0.0025
38
0.008
0.0025
0.130
0.0025
0.0001
0.005
22.0
1.2
3.3
0.001
1.3
621
5
0.025
23-Jun-09
7.332
0.06
0.3
0.0015
0.005
4
0.001
169.0
0.0025
33
0.007
0.0025
0.080
0.0015
0.0005
0.005
12.0
1.3
4.2
0.001
1.6
594
2
0.016
_
21-Sep-93
7.483
0.06
0.7
0.0015
0.005
10
0.001
205.0
0.0025
49
0.012
0.0025
0.100
0.0025
0.0001
0.005
14.0
1.8
3.8
0.001
2.5
657
3
0.013
22-Sep-93
' 7.285
0.05
1.4
0.0015
0.005
13
0.001
191.0
0.0025
50
0.012
0.0025
0.110
0.0025
0.0001
0.005
14.0
2.0
3.8
0.001
. 3.4
675
4
0.015
23-Sep-93
7.302
0.06
2.1
0.0015
0.005
11
0.001
184.0
0.0025
53
0.012
0.0025
0.140
0.0025
0.0001
0.005
15.0
2.1
3.8
0.001
4.2
614
1
0.015
25-Oct-93
7.653
0.08
5.4
0.0015
0.005
14
0.001
170.0
0.0025
49
0.009
0.0025
0.150
0.0025
0.0001
0.005
3.0
2.0
3.8
0.001
7.4
601
577
2
4
0.01326-Oct-93
0.012
27-Oct-93
8.049
0.04
7.1
0.0015
0.005
14
0.001
174.0
0.0025
42
0.008
0.0025
0.120
0.0025
0.0001
0.005
14.0
2.1
3.5
0.001
9.2
8.913
0.06
6.5
0.0030
0.005
11
0.001
170.0
0.0025
43
0.009
0.0025
0.150
0.0025
0.0001
0.005
10.0
1.8
3.7
0.001
8.3
566
3
0.012
_
21-Mar-94
7.475
0.12
7.0
0.0025
0.005
19
0.001
99.0
0.0025
52
0.015
0.0025
0.170
0.0015
0.0001
0.003
12.0
2.0
3.8
0.001
9.0
553
9
0.020
0.0025
0.0030
11-Apr-94
12-Sep-94
3_-Oct-94
13-Feb-95
7.453
0.07
6.3
0.0015
0.005
14
0.001
102.0
0.0025
44
0.011
0.0025
0.110
0.0025
0.0001
0.005
17.0
3.4
2.0
2.11
3.8
3.3
0.001
0.001
8.3
4.8
558
608
5
2
0.019
0.018
0.0500
0.0050
0.0050
0.0050
8.013
0.08
2.7
0.0015
0.005
12
0.001
115.0
0.0025
43
0.009
0.0025
0.210
0.0025
0.0001
0.005
8.43
0.04
2.2
0.0015
0.005
15
0.001
156.0
0.0025
40
0.007
0.0025
0.120
0.0025
0.0001
0.005
3.9
1.5
3.2
0.001
3.7
637
3
0.015
0.0500
0.0050
8.518
0.12
5.6
0.0015
0.005
18
0.001
99.0
0.0025
36
0.011
0.0025
0.120
0.0025
0.0006
0.005
1.7
2.1
2.9
0.001
7.7
9.7
517
437
531
567
6
0.025
0.020
0.020
0.012
0.0500
0.0025
0.0050
0.0025
1-May-95
7.523
0.07
0.9
0.0025
0.007
19
0.001
117.0
0.0025
37
0.012
0.0025
0.110
0.0015
0.0001
0.003
2.6
2.0
3.6
0.001
4
3
1-Aug-95
8.428
0.06
0.08
1.6
8.0
0.0250
0.005
19
0.001
118.0
0.0025
39
0.008
0.0150
0.125
0.0015
0.0001
0.003
2.4
1.9
2.1
2.0
2.9
0.001
0.001
3.5
10.1
0.0025
0.0500
0.0025
0.0050
7-Nov-95
8.483
0.0015
0.005
26
0.001
122.0
0.0025
44
0.008
0.0060
0.120
0.0025
0.0001
0.005
2.9
5-
Total
173.177
3.42
123.1
0.062
0.316
291
0.067
4515.0
0.049
1177
0.243
0.1450
5.265
0.048
0.0035
23
0.0002
0.250
23
0.011
0.034
223.0
39.6
23
82.7
23
0.023
23
169.5
23
15690
23
107
23
1.008
23
0.2125
8
0.0330
8
# Values a
Average
23
7.53
23
0.15
23
23
23
_0.014
0.046
23
23
23
23
23
23
23
23
23
0.002
23
5.4
0.003
0.025
13
0.003
196.3
0.002
51
0.011
0.0063
0.229
9.7
22.0
1.7
2.6
3.6
4.6
0.001
0.001
7.4
12.9
682
1138
5
11
0.044
0.286
0.0266
0.0500
0.0041
0.0050
Maximum
8.913
0.56
11.8
26
0.010
352.0
0.003
111
0.020
0.0270
0.850
0.003
0.0006
Minumum
Std. Dev.
6.7
0.04
0.16
0.1
4.1
0.002 0.005
0.0051 0.015
4
5
0.001
0.003
99.0
86.7
_ _0.001_ 33
0.001 18
0.007
0.0025
0.070
0.211
0.001
__ 0.001
0.0001
0.0001
0.003
0.011,
0.0
7.4
0.9
2.0
0.001
1.3
- 437
187
_ 1
2
+0.012
0.063
0.0025
0.0251
0.0025
0.0012
0.68
0.003
0.0084
0.5
0.5
0.000
4.0
When analysis reveals <D.L.
.1/2 detection limits is used
Page 1

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Mark McIntire (Review Engineer)
Date: 01/19/96
NPDES STAFF REPORT AND RECOMMENDATION
County: New Hanover
Permit No. NC0023973
PART I - GENERAL INFORMATION
1. Facility and Address:
City of Wilmington
M'Kean Maffitt (Southside) WWTP
3436 River Road
Wilmington, NC 28401
2. Date of Investigation: 1/17/96
3. Report Prepared by: Steve West
4. Persons Contacted and Telephone Number:
Doug Carter, ORC [phone]
5. Directions to Site: From the intersection of NCSR 1100 (River
Road) and NCSR 1117 south of Wilmington, travel 0.3 miles
south to the facility.
Mailing Address:
6. Discharge
Latitude:
USGS Quad
7. Site size
The plant
available
City of Wilmington
P.O. Box 1810
Wilmington, NC 28402
Point:
34° 09' 54" Longitude: 77° 56' 53"
No: K 27 NW USGS Name: Wilmington, NC
and expansion area consistent with application?
occupies 20 acres and there are 10 additional acres
for expansion.
8. Topography: The site slopes gently toward the Cape Fear River
and is approximately 25 feet msl.
9. Location of nearest dwelling: Approximately 1/4 mile.
10 Receiving
a.
b.
c.
stream or affected surface waters:
Classification: Class "SC" waters
River Basin and Subbasin No.: 03-06-17
Describe receiving stream features and pertinent
downstream uses: Tidal section of river used for
commercial shipping, and recreational boating and
fishing.
Cape Fear River

PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 12.0 MGD
b. What is the current permitted flow limit? 12.0 MGD
c. Actual treatment capacity of the current facility:
12.0 MGD
d. Date and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: An A to C was issued 9/25/95 for the replacement
of each of 2 mechanically -cleaned bar screens.
e. Please provide a description of existing wastewater
treatment facilities: The existing facility consists of
an influent flow meter, flow splitter, a bar screen, a
mechanically -cleaned bar screen (soon to be installed),
comminutor•and mechanical grit removal, dual primary
clarifiers,'dual trickling filters, recirculating pump
station (to primary clarifiers) short-term activated
sludge basin, screw pump station, dual secondary
clarifiers, dual chlorine contact tanks with gaseous
chlorination, and a 400 kw emergency power generator.
Residuals: thickener, three anaerobic digestors, belt
press, lime addition facility, and a covered storage
facility.
f. Please provide a description of proposed wastewater
treatment facilities: No major modifications are planned
at this time.
g. Possible toxic impacts to surface waters: Chlorine.
Pretreatment permits limit industrial toxicants.
h. Pretreatment Program: Approved, permitted SIUs:
National Linen 0.081 MGD
New Hanover Reg. Med. Ctr. 0.207 MGD
Wheeling Corrugating 0.047 MGD
2. Residuals handling and utilization/disposal scheme:
Residuals are thickened, anaerobically-digested, dewatered,
lime stabilized, and land applied through the City's Permit
No. WQ0001271.
3. Treatment plant classification: Class 4
4. SIC Code: 4952
Wastewater Code Primary: 01 Secondary: N/A
Main Treatment Unit Code: 400X3

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 Schedule dates:
Effective Date: N/A
Submission of Plans and Specs: N/A
Begin Construction: N/A
Complete Construction: N/A
4. Alternative Analysis Evaluation:
Wilmington has the largest WWTP in the region. The plant is
located adjacent to the Cape Fear River and soils are marginal
and the depth to the groundwater table is not sufficient for
subsurface disposal or spray irrigation.
5. Other Special Items: None
PART IV - EVALUATION AND RECOMMENDATIONS
The Southside plant has operated over the past year with no
effluent limit violations or chronic toxicity failures. The
City has indicated it will likely choose to perform its own
instream monitoring rather than participate in the UNCW
program.
It is recommended that a draft permit be prepared and placed
at public notice. If no significant adverse public comment is
received, it is recommended NPDES Permit No. NC0023973 be
reissued to the City of Wilmington in accordance with the
Cape Fear River basin -wide permitting strategy.
Signature of report preparer
Water Quality Regional Supervisor
cc: Technical Support Branch
Central Files
Wilmington Regional Office Files
Date
1 J 191C)�
Date