NC0001422_Staff Report and Recommendation_19940822

SOC PRIORITY PROJECT: YES NO X
If Yes, SOC No.
To: Permits and Engineering Unit
Water Quality Section
Attention: Greg Nizich
(Review Engineer)
Date: August 22, 1994
NPDES STAFF REPORT AND RECOMMENDATION
County: New Hanover
Permit No. NC0001422
PART I - GENERAL INFORMATION
1. Facility and Address:
Carolina Power and Light Company
Sutton Steam Electric Plant
Post Office Box 1551
Raleigh, North Carolina 27602
2 . Date of Investigation: August 9, 1994
3. Report Prepared by: Edward Beck
4. Persons Contacted and Telephone Number:
John Ruble, Manager (910) 343-3203
Bruce Morefield, ORC (910) 343-3208
5. Directions to Site: The facility is located on the west side
of US Highway 421 north of Wilmington approximately 2 miles
north of the Northeast Cape Fear River bridge.
6. Discharge Point (s) , List for all discharge points:
Latitude: 34° 16' 56" Longitude: 77° 59' 22"
Attach a USGS map extract and indicate treatment facility site and
discharge point on map.
U.S.G.S. Quad No: J27SW U.S.G.S. Quad Name: Castle Hayne
7. Site size and expansion area consistent with application ?
X Yes No If No, explain:
8. Topography: The site elevation varies from 25 feet to 5 to 10 ■
feet MSL. Portions of the site are within the flood plain.
9. Location of nearest dwelling: No dwellings in the vicinity.

10. Receiving stream or affected surface waters: Cape Fear River
a. Classification: Class C Swampwater
b. River Basin and Subbasin No. : 03-06-17
c. Describe receiving stream features and pertinent
downstream uses:
Tidal river used for shipping and fishing. Receives
several discharges from major industries.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: 250 MGD (001)
b. What is the current permitted flow limit? 250 MGD
c. Actual treatment capacity of the current facility? 250
MGD
d. Date (s) and construction activities allowed by previous
Authorizations to Construct issued in the previous two
years: No ATC in past two years
e. Please provide a description of existing or substantially
constructed wastewater treatment facilities: All process
wastewater and collected stormwater ultimately enters the
1110 acre cooling pond. Water is recycled from the pond to
supply condensers and heat exchangers. Water in the pond
is supplemented with river water as needed and is
discharged once or twice per year as needed to control
conductivity and water level. Two cement retention basins
receive all low volume waste, effluent from the oily waste
treatment system, and metal cleaning waste that is not
incinerated. Flow then goes to the old ash pond which
discharges to the cooling pond. The old ash pond, 68
acres, receives flow from both retention basins and coal
pile and tank farm runoff. All ash sluice goes to the 74
acre new ash pond which provides sedimentation and pH
control prior to discharge to the cooling pond.
f. Please provide a description of proposed wastewater
treatment facilities: No changes are proposed.
g. Possible toxic impacts to surface waters: All wastewater
is held in the cooling pond for extended periods of time
which allows for oxidation and dilution of constituents.
Annual pollutant analysis indicates that toxicity is not
a problem.
h. Pretreatment Program (POTWs only) : Not Needed
2. Residuals handling and utilization/disposal scheme: Ash can
be removed from the ash ponds and reused as approved by Permit
No WQ0006109 . No other residuals are generated.

3 . Treatment plant classification: Class II
4. SIC Code (s) : 4911
Wastewater Code (s) Primary: 14, 68, 69, 70
Main Treatment Unit Code: 51500
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant
Funds or are any public monies (municipals only) involved? NA
2. Special monitoring or limitations (including toxicity)
requests: No The facility has had no problem with toxicity.
3 . Important SOC, JOC or Compliance Schedule dates: NA
4. Alternative Analysis Evaluation: Has the facility evaluated
all of the non-discharge options available? Please provide
regional perspective for each option evaluated.
Non-discharge options are not practical. Discharge from the
cooling pond occurs only once or twice per year but the
discharge rate is quite high.
PART IV - EVALUATION AND RECOMMENDATIONS
All waste sources ultimately are discharged to the cooling
pond from which wastewater is discharged to surface waters once or
twice per year. In accordance with the permitting policy for power
generating plants, the waste streams to the cooling pond are
treated as separate outfalls with effluent limits and monitoring
requirements. No changes are recommended in the permit structure.
The toxicity monitoring requirements appear to be appropriate and
the facility has had no problem meeting the limits.
It is recommended that a permit be drafted and sent to public
notice. If no significant adverse comments are received, it is
recommended that the permit be reissued for a period of five years.
(2.0_0..64__
Signature of Report Preparer Date
Z2,1 ' csr / y9
Water Quality Regional Supervisor D yFs pe .
cc: Wilmington Regional Office
Technical Support Branch QB �`
Central Files
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RATING SCALE FOR ^CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
Name of Facility: 09 at- S"rectA„
Owner or Contact Person:
Mailing Address: r? 0 t e c /•5.5`/ I�a�Julti rl C a-76o.
County: N-ei.ti #-'v oUe Telephone: 9,o 3 V - 3�,oFr
Present Classification: New Facility Existing Facility Y
NPDES Per. No. NCOO /921 Nondisc. Per. No.WQ Health Dept.Per No.
Rated by: /Z ratrue Telephone: Date:
Reviewed by: Health Dept. Telephone:
Regional Office Telephone:
Central Office Telephone:
ORC: rB(`k.t ro YY\or,Fi a Ie( Grade: 7L Telephone: [phone]'
Check Classification(s): Subsurface Spray Irrigation Land Application
Wastewater Classification: (Circle One) I II III IV Total Points: Gl1(
J4-F ANT PROCESSES AND RELATED CONTROL EQUIPMENT WHICH ARE AN INTEGRAL PART OF INDUSTRIAL PRODUCTION s-fALL NOT i$
CONSIDERED WASTE TREATMENT FOR THE PURPOSE OF CiASSIFICATION.ALSO SEPTIC TANK SYSTBAS CONSISTING ONLY OF SEPTIC TAN(
AND GRAVITY NITRFICATION L.N ES ARE EXEMPT FROM CLASSIFICATION,
SUBSURFACE CLASSIFICATION SPRAY IRRIGATION CLASSIFICATION
(check all units that apply) (check all units that apply)
1, septic tanks 1. preliminary treatment (definition no. 32 )
2. pump tanks 2. lagoons
3. siphon or pump-dosing systems 3, septic tanks
4_ sand filters 4, pump tanks
5. grease trap/interceptor 5. pumps
6. oil/water separators 6, sand filters
7. gravity subsurface treatment and disposal: 7, grease trap/interceptor
8. pressure subsurface treatment and disposal: 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 FACILRY CLASSIFICATION
The following systems shall be assigned a Class I classification,Id=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 N 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 lifters,disinfection
and direct discharge;
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 Remediatlon 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.
g` Single-family discharging systems,with the exception of Aerobic Treatment Units,will be classified if permitted after July 1,
1993 or if upon inspection by the Division,N 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.