NC0003425_Staff Report_20020206

SOC PRIORITY PROJECT: Yes: No:XX
If Yes, SOC No.:
NPDES STAFF REPORT AND RECOMMENDATIONS
FOR CP&L ROXBORO STEAM ELECTRIC PLANT
Date: March 20, 2002
To: Stormwater and General Permits Unit
Water Quality Section
Attention: Teresa Rodriguez
County: Person
Permit No.: NCO03425 PERMIT RENEWAL
PART I -GENERAL INFORMATION
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2002
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Facility and Address CP&L Roxboro Steam Electric Plant
1700 Dunnaway Road
Semora, North Carolina 27343
Person County
2. Date of Site Inspection: February 06, 2002
3. Report Prepared by: Mitch Hayes
4. Persons Contacted and Telephone Number: Joanie P. Cooke 919.362.3553
5. Directions to Site: From Raleigh, take US 70 West to I-85 to Durham. Exit
onto US 501 North. Drive to Roxboro, turn left onto Hwy. 57 North. Drive to
S.R. 1340, turn right. Drive to S.R. 1336, turn left. Drive approximately one
mile and turn left onto Dunnaway Road. Drive to the end of road.
6. Discharge Point(s), List for all discharge points:
Outfall Number 003 Latitude: 361 28' 48" Longitude: 79° 05' 11"
Outfall Number 006 Latitude: 361 29' 12" Longitude: 79" 04' 41"
Attach a U.S.G.S. map extract and indicate treatment facility site and discharge
point on map.
U.S.G.S. Quad No.: B22 - NE U.S.G.S. Quad Name: Olive Hill, NC
Non -Discharge Staff Report
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7. Site size and expansion area consistent with application? Yes: X
No: If No, explain:
8. Topography (relationship to flood plain included): According to FEMA Flood
Insurance Rate Map # 37145C0075 B, the facility is not within a 500 -year
flood zone.
9. Location of nearest dwelling: one half mile
10. Receiving stream or affected surface waters: Hyco Lake
a. Classification: WS - V&B
b. River Basin and Subbasin No.: 03 02 05
Describe receiving stream features and pertinent downstream uses:
Hyco Lake discharges into Hyco River. Hyco River flows into Buggs Lake
in Virginia (Kerr Scott Lake in NC). Both lakes serve as the main water
supply for various cities and towns in NC and VA.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be permitted: There are two Discharge Points: OUTFALL
003 (Heated Water Discharge Canal System), and OUTFALL 006 (Coal Pile Runoff
Treatment System). For Outfall 003 no flow is permitted however, the average flow
from Outfall 003 is 1081 MGD. For Outfall 006 no flow is permitted, however the
average flow is 0.4 MGD. Outfall 003 contains flows from several waste streams,
including once -through cooling water, stormwater runoff, and the effluent from the
ash pond (Outfall number 002), which in turn receives and treats combined flows
from the ash transport system, low volume wastes, the domestic wastewater system
(Outfall 008), the dry fly ash handling system, cooling tower blowdown (Outfall
number 005), storm water runoff, and drainage from the ash landfill. Outfall 008 is
the only flow permitted at 0.015 MGD.
b. What is the current permitted capacity of the Waste Treatment facility?
For Outfall 008: 0.015 MGD
c. Actual treatment capacity of the current facility (current design capacity)?
For Outfall 008: 0.015 MGD
d. Date(s) and construction activities allowed by previous Authorization to Construct
issued in the previous two years: N/A
e. Please provide a description of existing or substantially constructed wastewater
treatment facilities: The wastewater treatment system (Outfall 008) consists of:
a screen, comminutor, surge tank, aeration tank, clarifier, chlorine contact
chamber, and a sludge holding tank.
Non -Discharge Staff Report
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f Please provide a description of proposed wastewater treatment facilities: N/A
g. Possible toxic impacts to surface waters- asbestos, strontium, uranium,
vanadium, zirconium, antimony, arsenic, beryllium, chromium, copper, lead,
nickel, selenium, silver, thallium, and zinc.
h. Pretreatment Program (POTWs only): N/A
in development: approved:
should be required: not needed:
2. Residuals handling and utilization/disposal scheme:
a. If residuals are being land applied, please specify DEM permit no.: N/A
Residual Contractor:
Telephone No.:
b Residuals stabilization: N/A
PSRP:
PFRP: Other
c. Landfill: N/A
d. Other disposal/utilization scheme (Specify): Solomon Sanitary hauls the sludge
from the wastewater treatment plant and disposes of it at the City of Roxboro
Wastewater Treatment Plant.
3. Treatment plant classification (attach completed rating sheet)_:Grade I Physical /
Chemical
4. SIC Code(s): 4911
Wastewater Code(s) of actual wastewater, not particular facilities i.e., non -contact
cooling water discharge from a metal plating company would be 14, not 56.
Primary._0f,- 14, 15, 16, 17, 60, 68, 69, 70, 73
Main Treatment Unit Code. 03 0 _ 7
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are any public monies
involved. (municipals only)? N/A
2. Special monitoring or limitations (including toxicity) requests: None
3. Important SOC, JOC or Compliance Schedule dates: (Please indicate) N/A
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Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
4. Alternative Analysis Evaluation: Has the facility evaluated all of the non -discharge
options available? Yes
Please provide regional perspective for each option evaluated.
Spray Irrigation N/A
Connection to Regional Sewer System: N/A
Subsurface• N/A
Other disposal options. None
5. Other Special Items: None
PART IV - EVALUATION AND RECOMMENDATIONS
Mitch Hayes of the Division of Water Office conducted a site visit at CP&L Roxboro
Steam Plant on February 06, 2002 and reviewed the renewal application. There are five
permitted discharge outfalls under the current permit. Outfall 002 is the ash settling pond,
003 is the heated water discharge canal, 005 is the cooling tower water blowdown, 006 is
the coal pile run off discharge, and 008 is the wastewater treatment plant discharge.
Outfalls 003 and 006 discharge directly into Hyco Lake. Outfall 008 is the only permitted
flow at 0.015 MGD. Effluent from Outfall 003 and 004 were clear and free of solids.
Effluent from Outfall 005 contained some solids. Effluent from Outfall 006 was brownish
but clear. Effluent from Outfall 008 could not be seen since it is mixed in another pipe with
effluent from Outfall 005.
The biological monitoring study plan for 2002 was approved 12/07/2001. This discontinues
sampling for total solids and total suspended solids, and will discontinue sampling for
luminum, cadmium, and mercury. Fish consumption advisory was removed which allows
sampling for bluegill and largemouth bass at Transect 2, and white catfish at Transects 2
and 6 to be dropped.
The facility is compliant with permit limitations and monitoring requirements. The
Raleigh Regional Office recommends the renewal of the permit NC0003425 in accordance
with the Roanoke River Basin Policy.
Water Quality Regional Supervisor
Non -Discharge Staff Report
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Date