NC0021920_Permit (Issuance)_19950821

NPDES DOCUHENT SCANNING COVER SHEET
NC0021920
Whiteville WWTP
NPDES Permit:
Document Type: /
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Special Order by Consent
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
August 21, 1995
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State cf North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management
James B. Hunt, Jr., Governor
Jonathan B. Howes, Secretary
A. Preston Howard, Jr., P.E., Director
Mr. Jeff Emory
City of Whiteville
PO Box 607
Whiteville, North Carolina 28472
EDlF-1NI
August 21, 1995
Subject: NPDES Permit Issuance
Permit No. NC0021920
City of Whiteville WWTP
Columbus County
Dear Mr. Emory:
In accordance with the application for a discharge permit, the Division is forwarding herewith the
subject NPDES permit. This permit is issued pursuant to the requirements of North Carolina General
Statute 143-215.1 and the Memorandum of Agreement between North Carolina and the US Environmental
Protection Agency dated December 6, 1983.
The final permit includes a special condition in Part III that the town needs to address before
expansion to 3.0 MGD. The town must complete the inflow and infiltration study already underway and a
sewer rehabilitation schedule must be developed and implemented with approval of the Wilmington
Regional Office.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty (30)
days following receipt of this letter. This request must be in the form of a written petition, conforming to
Chapter 150B of the North Carolina General Statutes, and filed with the Office of Administrative
Hearings, Post Office Drawer 27447, Raleigh, North Carolina 27611-7447. Unless such demand is
made, this decision shall be final and binding.
Please take notice this permit is not transferable. Part II, E.4. addresses the requirements to be
followed in case of change in ownership or control of this discharge.
This permit does not affect the legal requirements to obtain other permits which may be required by
the Division of Environmental Management or permits required by the Division of Land Resources,
Coastal Area Management Act or any other Federal or Local governmental permit that may be required.
If you have any questions concerning this permit, please contact Charles Alvarez at telephone
number [phone], extension 553.
Sincerely,
Original Sighed .BY
David A. Goodrich
A. Preston Howard, Jr., P.E.
cc: Central Files
Wilmington Regional Office
Mr. Roosevelt Childress, EPA
Permits and Engineering Unit
Facilities Assessment Unit
Aquatic Toxicity and Survey Unit
Operator Training and Certification Unit
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
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Permit No. NC0021920
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT, HEALTH, AND NATURAL RESOURCES
DIVISION OF ENVIRONMENTAL MANAGEMENT
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provision of North Carolina General Statute 143-215.1,
other lawful standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended,
City of Whiteville
is hereby authorized to discharge wastewater from a facility located at
Whitemarsh WWTP
off of Nolan Avenue
Whiteville
Columbus County
to receiving waters designated as White Marsh Swamp in the Lumber River Basin
in accordance with effluent limitations, monitoring requirements, and other conditions set forth in
Parts I, II, and III hereof.
This permit shall become effective October 1,1995
This permit and the authorization to discharge shall expire at midnight on December 31, 1999
Signed this day August 21, 1995
Original Signed By
David A. Goodrich
A. Preston Howard, Jr., P.E., Director
Division of Environmental Management
By Authority of the Environmental Management Commission

Permit No. NC0021920
SUPPLEMENT TO PERMIT COVER SHEET
City of Whiteville
is hereby authorized to:
1. Continue to operate the existing 2.5 MGD wastewater treatment facility consisting of an influent
pump station, a bar screen, an equilization basin, an oxidation ditch, dual clarifiers, a non -aerated
polishing pond, a post aeration basin, gas chlorination and a chlorine contact chamber, and four
aerated sludge holding tanks located at Whitemarsh WWTP, off of Nolan Avenue, Whiteville,
Columbus County (See Part III of this Permit), and
2. After receiving an Authorization to Construct from the Division of Environmental Management,
construct additions required to treat the 3.0 MGD wasteflow, and
3. Discharge from said treatment works at the location specified on the attached map into White
Marsh Swamp which is classified Class C-Swamp waters in the Lumber River Basin.

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A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1- October 31)
Permit No. NC0021920
During the period beginning on the effective date of the permit and lasting until expansion above 2.5MGD, the Permittee is authorized to
discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Discharge Limitations
Monthly Avg.
Flow 2.5 MGD
BOD, 5 day, 20°C** 5.0 m g / I
TSS** 30.0 mg/I
NH3 as N 2.0 mg/I
Dissolved Oxygen ***
Fecal Coliform (geometric mean) 200.0 /100 ml
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Chronic Toxicity****
Weekly Avg. Daily Max
7.5 mg/I
45.0 mg/I
400.0 /100 ml
Monitoring
Measurement
Frequency
Continuous
Daily
Daily
Daily
Daily
Daily
Daily
Daily
Monthly
Monthly
Quarterly
Requirements
Sample
Type
Recording
Composite
Composite
Composite
Grab
Grab
Grab
Grab
Composite
Composite
Composite
*Sample
kocatiort
I or E
E, I
E, I
E
E, U, D
E, U, D
E
E,U,D
E
E
E
* Sample locations: E - Effluent, I - Influent, U - Upstream at US 74/76, D - Downstream at railroad crossing
Upstream and downstream samples shall be grab samples. Stream samples shall be collected three times per week during June, July, August,
and September and once per week during the remaining months of the year.
** The monthly average effluent BOD5 and TSS concentrations shall not exceed 15 % of the respective influent value (85% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
**** Chronic Toxicity (Ceriodaphnia) P/F at 45%; January, April, July, and October; See Part III, Condition G.
The pH shall not be less than 6.0 standard units nor greater than 9.0 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 SUMMER (April 1- October 31)
Permit No. NC0021920
During the period beginning on the effective date of the permit and lasting until expansion above 2.5MGD, the Permittee is authorized to
discharge from outfall(s) serial number 001. (Continued)
Effluent Characteristics
Conductivity
Oil and Grease
Lead
Mercury
Discharge Limitations
Units (specify)
Monthly Avg. Weekly Avg.
30.0 mg/I
Daily Max
60.0 mg/I
55.0 µg/I
0.03 µg/I
Monitoring
Measurement
Frequency
Daily
Weekly
Weekly
Weekly
Requirements
Sample *Sample
Type. location
Grab E,U,D
Grab E
Composite E
Composite E

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1 - March 31) Permit No. NC0021920
During the period beginning on the effective date of the permit and lasting until expansion above 2.5MGD, the Permittee is authorized to
discharge from outfall(s) serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Flow
BOD, 5 day, 20°C**
TSS**
NH3 as N
Dissolved Oxygen ***
Fecal Coliform (geometric mean)
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Chronic Toxicity****
Discharge Limitations
Monthly Avg.
2.5 MGD
10.0 mg/I
30.0 mg/I
4.0 mg/I
200.0 /100 ml
Monitoring
Measurement
Weekly Avg. Daily Max Frequency
Continuous
15.0 mg/I Daily
45.0 mg/I Daily
Daily
Daily
400.0 /100 ml Daily
Daily
Daily
Monthly
Monthly
Quarterly
Requirements
Sample
Type
Recording
Composite
Composite
Composite
Grab
Grab
Grab
Grab
Composite
Composite
Composite
*Sample
Location
1 or E
E, I
E, I
E
E, U, D
E, U, D
E
E,U,D
E
E
E
* Sample locations: E - Effluent, I - Influent, U - Upstream at US 74/76, D - Downstream at railroad crossing
Upstream and downstream samples shall be grab samples. Stream samples shall be collected three times per week during June, July, August,
and September and once per week during the remaining months of the year.
** The monthly average effluent BOD5 and TSS concentrations shall not exceed 15 % of the respective influent value (85% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
**** Chronic Toxicity (Ceriodaphnia) P/F at 45%; January, April, July, and October; See Part III, Condition G.
The pH shall not be less than 6.0 standard units nor greater than 9.0 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 WINTER (November 1 - March 31) Permit No. NC0021920
During the period beginning on the effective date of the permit and lasting until expansion above 2.5MGD, the Permittee is authorized to •
discharge from outfall(s) serial number 001. (Continued)
Effluent Characteristics
Conductivity
Oil and Grease
Lead
Mercury
Discharge Limitations
Units (specify)
Monthly Avg. Weekly Avg. Daily Max
30.0 mg/I 60.0 mg/I
55.0 pg/I
0.03 µg/I
Monitoring
Measurement
Frequency
Daily
Weekly
Weekly
Weekly
Requirements
Sample *Sample
Type Location
Grab E,U,D
Grab E
Composite E
Composite E

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS SUMMER (April 1 - October 31) Permit No. NC0021920
During the period beginning after expansion above 2.5MGD and lasting until expiration, the Permittee is authorized to discharge from outfall(s)
serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Discharge Limitations
Monthly Avg.
Flow 3.0 MGD
BOD, 5 day, 20°C** 5.0 mg/I
Total Suspended Residue** 30.0 mg/I
NH3 as N 2.0 mg/I
Dissolved Oxygen ***
Fecal Coliform (geometric mean) 200.0 /100 mi
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Chronic Toxicity****
Weekly Avg, Daily Max
7.5 mg/I
45.0 mg/I
400.0 /100 ml
Monitoring
Measurement
Frequency
Continuous
Daily
Daily
Daily
Daily
Daily
28.0 µg/I Daily
Daily
Monthly
Monthly
Quarterly
Requirements
Sample
Type
Recording
Composite
Composite
Composite
Grab
Grab
Grab
Grab
Composite
Composite
Composite
*Sample
Location
I or E
E, I
E, I
E
E, U, D
E, U, D
E
E,U,D
E
E
E
* Sample locations: E - Effluent, I - Influent, U - Upstream at US 74/76, D - Downstream at railroad crossing
Upstream and downstream samples shall be grab samples. Stream samples shall be collected three times per week during June, July, August,
and September and once per week during the remaining months of the year.
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value
(85% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
**** Chronic Toxicity (Ceriodaphnia) P/F at 50%; January, April, July and October; See Part III, Condition I.
The pH shall not be less than 6:0 standard units nor greater than 9.0 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 SUMMER (April 1- October 31) Permit No. NC0021920
During the period beginning after expansion above 2.5MGD and lasting until expiration, the Pennittee is authorized to discharge from outfall(s)
serial number 001. (Continued)
Effluent Characteristics Discharge Limitations Monitoring Requirements
Units (specify) Measurement Sample *Sample
Monthly Avg, Weekly Avg. Daily Max Frequency Tvpe, Location
Conductivity Grab U, D
Oil and Grease 30.0 m g/ I 60.0 m g/ I Weekly Grab E
Lead 50.0 µ g / I Weekly Composite E
Mercury 0.02 µ g / I Weekly Composite E

A. (). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS WINTER (November 1- March 31) Permit No. NC0021920
During the period beginning after expansion above 2.5MGD and lasting until expiration, the Permittee is authorized to discharge from outfall(s)
serial number 001. Such discharges shall be limited and monitored by the permittee as specified below:
Effluent Characteristics
Discharge Limitations
Monthly Avg.
Flow 3.0 MGD
BOD, 5 day, 20°C** 10.0 mg/I
Total Suspended Residue** 30.0 m g/ I
NH3asN 4.0mg/I
Dissolved Oxygen ***
Fecal Coliform (geometric mean) 200.0 /100 ml
Total Residual Chlorine
Temperature
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Chronic Toxicity****
Weekly Avg, Daily Max
15.0 mg/I
45.0 mg/I
400.0 /100 ml
Monitoring
Measurement
Frequency
Continuous
Daily
Daily
Daily
Daily
Daily
28.0 µg/I Daily
Daily
Monthly
Monthly
Quarterly
Requirements
Sample
Type
Recording
Composite
Composite
Composite
Grab
Grab
Grab
Grab
Composite
Composite
Composite
*Sample
Location
1 or E
E, I
E, I
E
E, U, D
E, U, D
E
E,U,D
E
E
E
* Sample locations: E - Effluent, I - Influent, U - Upstream at US 74/76, D - Downstream at railroad crossing
Upstream and downstream samples shall be grab samples. Stream samples shall be collected three times per week during June, July, August,
and September and once per week during the remaining months of the year.
** The monthly average effluent BOD5 and Total Suspended Residue concentrations shall not exceed 15 % of the respective influent value
(85% removal).
*** The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/l.
**** Chronic Toxicity (Ceriodaphnia) P/F at 50%; January, April, July and October; See Part III, Condition I.
The pH shall not be less than 6.0 standard units nor greater than 9.0 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 WINTER (November 1- March 31) Permit No. NC0021920
During the period beginning after expansion above 2.5MGD and lasting until expiration, the Permittee is authorized to discharge from outfall(s)
serial number 001. (Continued)
Effluent Characteristics
Conductivity
Oil and Grease
Lead
Mercury
Discharge Limitations
Units (specify)
Monthly Avg. Weekly Avg. Daily Max
30.0 mg/I 60.0 mg/I
50.0 µg/I
0.02 µg/I
Monitoring
Measurement
Frequency
Weekly
Weekly
Weekly
Requirements
Sample *Sample
Type Location
Grab U, D
Grab E
Composite E
Composite E

Part III Permit No. NC0021920
G. CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:
1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is 45% (defined as treatment two in the North Carolina procedure document).
The permit holder shall perform quarterly monitoring using this procedure to establish compliance
with the permit condition. The first test will be performed after thirty days from the effective date
of this permit during the months of January, April, July, and October. Effluent sampling for this
testing shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
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 TGP3B. Additionally, DEM Form AT-1 (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 this monitoring requirement 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.
H. The Town of Whiteville must continue its study of infiltration and inflow problems of the
town's collection system and report results to the Wilmington Regional Office. A schedule of
rehabilitation for the sewer system will be formulated with the Regional Office after completion of
the I & I study.
I. CHRONIC TOXICITY PAS S/FAIL PERMIT LIMIT (QRTRLY)
The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in:

1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic
Bioassay Procedure - Revised *September 1989) or subsequent versions.
The effluent concentration at which there may be no observable inhibition of reproduction or
significant mortality is 50% (defined as treatment two in the North Carolina procedure document).
The permit holder shall perform quarterly monitoring using this procedure to establish compliance
with the permit condition. The first test will be performed after thirty days from the effective date
of this permit during the months of January, April, July and October. Effluent sampling for this
testing shall be performed at the NPDES permitted final effluent discharge below all treatment
processes.
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 TGP3B. Additionally, DEM Form AT-1 (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 this monitoring requirement 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.

SOC PRIORITY PROJECT: No
To: Permits and Engineering Unit
Water Quality Section
Attention: Charles Alvarez (Review Engineer)
Date: 08/09/94
NPDES STAFF REPORT AND RECOMMENDATION
County: Columbus
Permit No. NC0021920
PART I - GENERAL INFORMATION
1. Facility and Address: City of Whiteville
P.O. Box 607
Whiteville, NC 28472
2. Date of Investigation: 08/04/94
3. Report Prepared by: B. Steven West
4. Persons Contacted and Telephone Number:
Mr. Asure Spivey, Public Works Director [phone]
5. Directions to Site: Travel US Hwy 74/76 to Whiteville, take US
Hwy 74/76 Business into Whiteville. Take a left on Tram Road
and travel approximately 1/4 mile to Nolan Avenue. Take a
left at the WWTP sign and plant is at the end of the road.
6. Discharge Point:
Latitude: 34° 19' 42" Longitude: 78° 40' 48"
USGS Quad No: J 24 SW USGS Name: Whiteville, NC
7. Site size and expansion area consistent with application?
N/A
8. Topography: The site slopes gently towards White Marsh Swamp
and is approximately 60 feet above msl.
9. Location of nearest dwelling: Approximately 0.5 mile.
10. Receiving stream or affected surface waters: White Marsh Swamp
a. Classification: Class "C-swamp" waters
b. River Basin and Subbasin No.: 03-07-58
c. Describe receiving stream features and pertinent
downstream uses: Fishing, secondary recreation

PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of wastewater to be permitted: 3.0 MGD
b. What is the current permitted flow limit? 2.5 MGD
c. Actual treatment capacity of the current facility:
The plant is rated at 2.5 MGD; according to operators
and the City's consultant engineers, treatment at flows
of 3.0 MGD has been sufficient to meet current permit
limits.
d. Date and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: none
e. Please provide a description of existing wastewater
treatment facilities: The facility currently exists of
an influent pump station, dual spiral lift pumps,
mechanical bar screen, a 2.5 MG oxidation ditch equipped
with four 20 hp aspirator -type aerators (routinely only
one is used at a time), a 2 MG equalization basin, dual
0.125 MG clarifiers with return activated sludge, a 5 MG
polishing pond with a central baffle, a 0.4 MG reaeration
basin with a 20 hp mechanical aerator, a gaseous chlorine
contact chamber, and four 0.19 MG sludge holding tanks
with aeration.
f. Please provide a description of proposed wastewater
treatment facilities: Planned plant modifications
include relocating the chlorine feed point to the
rearation basin and baffling the basin. A back-up
generator for plant operation is on the budget.
g. Possible toxic impacts to surface waters: Chlorine is a
potential contributor at 0.2 mg/1, but the plant has
passed chronic toxicity tests for the last twelve month
period, and relocation of the chlorine feed point should
lower levels even more.
h. Pretreatment Program: Approved; there are several
proposed users that will likely be CIUs, Georgia-Pacific
and Columbus County Industrial Park.
2. Residuals handling and utilization/disposal scheme:
Residuals are held in four 0.19 MG aerated holding tanks and
disposed of under Permit No. WQ0000048 held by the City.
3. Treatment plant classification: Class 4
4. SIC Code: 4952
Wastewater Code Primary: 01 Secondary: N/A
Main Treatment Unit Code: 105X3

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:
Whiteville has the largest WWTP in the region. The plant is
located adjacent to White Marsh Swamp and soils are marginal
and the depth to the groundwater table is not sufficient for
subsurface disposal or spray irrigation.
5. Other Special Items: See Part IV.
PART IV - EVALUATION AND RECOMMENDATIONS
The City of Whiteville WWTP is well -operated and
maintained and has not experienced any effluent limit
violations in the past twelve months. The effluent was clear
and free of suspended solids on the day of the inspection,
and sunfish and bass were observed in the area below the
outfall.
Whiteville is proposing an increase in flow from 2.5 MGD
to 3.0 MGD. According to plant operators, the City's
consultant and a cursory review of monitoring data, the plant
has efficiently treated flows at 3.0 MGD with no permit limit
excursions with the exception of fecal coliform. A proposed
relocation of the chlorine feed point to increase contact
time and reduce residual levels should alleviate this
problem. The aeration basin oxygen loading capacity and the
size of the clarifiers are technically adequate to treat the
proposed 3.0 MGD. The submitted Engineering Evaluation did
not clearly address sludge management associated with the
increased flow request. It is recommended the City determine
if plant holding capacity and application area is sufficient
to treat and dispose of the increased sludge loading. It is
recommended that the City be required to address the plant's dual
treatment capability which is required for hydraulically -expanding
facilities. The plant is currently capable of operating on a dual
basis but is not doing so because of the use of one oxidation
ditch as an equalization basin. The City plans to eventually
expand to 5.0 MGD and use the ditch as it was designed.

PART IV - EVALUATION AND RECOMMENDATIONS (cont.)
The White Marsh Swamp appears to be water quality -
stressed upon a review of upstream and downstream DO
monitoring performed by the City. Upstream DO levels during
the summer months have been seen in the 1 to 2 mg/1 range.
The City has identified beavers to be causing a problem with
creating stagnated flow in the Swamp and causing flooding in
-some areas. The City is currently working with and has
contracted with the State Dept. of Agriculture to trap
beavers and destroy dams in the Swamp. These activities
should help to increase flushing and raise DO levels.
Inflow and infiltration appear to be contributing
approximately 2 to 3 MGD during large storm events. The City
has identified several problem areas but is currently unable
to fund a rehabilitation project. The City has applied to
the Construction G & L Section for a loan to fund this
project but has not yet received a response. One problem
area that has been identified is a sewer main which crosses
a creek that is infested with beavers, and during high flows
the main is apparently receiving significant I & I. The
beaver control program should help this problem area. It is
recommended that the City submit a written schedule of plans to
secure financing for, conduct an investigation of, and
rehabilitate the sewer collection system.
Upon commitment received by the City to submit a plan of
action to remediate I & I, and after satisfactory review of
the Environmental Assessment, 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. NC0021920 be reissued to the City of Whiteville in accordance
with the Lumber River basin -wide permitting strategy.
JJ
Signature of report preparer
?ZE /W iiI'i '
ty Regional Supervisor
cc: Technical Support Branch
Central Files
Wilmington Regional Office Files
Date
S /0 9,/
Date

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