NC0004961_Request for Reduction of Monitoring_19930616

State of 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 J.S. Carter
Duke Power Company
Generation Services Department
13339 Hagers Ferry Road
Huntersville, NC 28078-7929
Dear Mr Carter:
Aml�!WA
4
�EHNF�
June 16, 1993
Subject- Request for Reduction of Monitoring
Duke Power Company
NC0004979-Allen Steam Station
NC0004774-Buck Steam Station
N00005088-Cliffside Steam Station
NC0003468-Dan River Steam Station
NC0004987-Mars hall Stearn Station
NC0004961-Riverbend Steam Station
On January 20, 1993 the Division of Environmental Management received a request from
Dayna Russell of Duke Power for the reduction in monitoring requirements The requirement
requested to be removed from the above mentioned permits read as follows- "One additional grab
sample shall be collected and analyzed for oil and grease, and total suspended solids during the
period of maximum expected flow for each rainfall event exceeding a specified depth per facility
per day (25% of the l OY24H event). The corresponding flow shall be reported. The Permittee
shall report the presence of cenospheres observed in the samples. After monitoring for a period
of one year, the Permittee may request reduction or elimination of this monitoring." DEM has
reviewed the request and the data submitted over the past year for the above facilities and has
agreed to the reduction of monitoring by removing the above statement
Please find enclosed revised effluent pages which should be inserted into each appropriate
permit. The old pages should be discarded. The effluent pages for Marshall (NC0004987) have
previously been changed and sent under separate cover All other terms and conditions contained
in the original permit remain unchanged and in full effect These permit modifications are
issued pursuant to the requirements of North Carolina General Statutes 143-215 1 and the
Memorandum of Agreement between North Carolina and the U. S. Environmental Protection
Agency
If any parts, measurement frequencies
are unacceptable to you, you have the rigl
within thirty (30) days following receipt of
written petition, conforming to Chapter 151
with the Office of Administrative Hearings,
27611-7447. Unless such demand 1s made,
P O Box 29535, Raleigh, North Carolina 27626-0535
An Equal Opportunity Affirmative Action Employer
or sampling requirements contained in this permit
t to an adjudicatory hearing upon written request
this letter. This request must be in the form of a
1B of the North Carolina General Statutes, and filed
Post Office Drawer 27447, Raleigh, North Carolina
this decision shall be final and binding
Telephone [phone] FAX [phone]
50% recycled/ 10% post -consumer paper

J S Carter
Duke Power Company
June 1, 1993
Page 2
If you have any questions concerning these permit modifications, please contact Mr Randy
Kepler at telephone number 919/733-5083.
Sincerely,
OR41,
V Preston Hb d, Jr. P E
cc Jim Reid, Asheville Regional Office
Ron Linville, Winston-Salem Regional Office
Mike Parker, Mooresville Regional Office
Technical Support Branch
Dayna J. Russell, Duke Power
Compliance
Permits and Engineering Unit (Copy per each permit)
Central Files (Copy per each permit)
° !j` 1 X93
d i°tev; J3'9 Sig o�es4�yii

A (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Permit No NC0004979
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized
to discharge
from
outfall serial number 002
Such discharges shall be limited and monitored by the Permittee as
specified below:
Effluent Characteristics
Discharge Limitations
Monitoring
Requirements
Lbs/day Units (Specif
Measurement
Sample
*Sample
Mon. Ayg.Daily Max. Mon. Avg. Daily Max.
Frequency
Type
Location
Flow
Weekly
Pump Logs or
E
Oil and Grease
15 0 mg/I 20 0 mg/I
2/rnonth
Similar readings
Grab
E
Total Suspended Solids****
30 0 mg/I 100 0 mg/I
2/month
Grab
E
Total Copper
1 0 mg/I 1 0 mg/I
2/month
Grab
E
Total Iron
1 0 mg/I 1 0 mg/I
2/month
Grab
E
Total Arsenic
450 0 Rg/I
Quarterly
Grab
E
Total Selenium
45 0 µg/I
Quarterly
Grab
E
Total Nitrogen (NO2 + NO3 + TKN)
Quarterly
Grab
E
Total Phosphorus
Quarterly
Grab
E
Chronic Toxicity**
Quarterly
Grab
E
Pollutant Analysis ***
Annually
E
r
* Sample Locations: E - Effluent
** Chronic Toxicity (Ceriodaphma) P/F at I I%; January, April, July, and October, Sac Part III, Condition P.
*** See Part III, Condition Q.
**** Monthly average of 50 mg/1 is permitted provided that the Permittee can satisfactorily demonstrate, the the difference between
30 mg/1 and 50 mg/1 is due to the concentration of total suspended solids in the intake water.
The metal cleaning waste, coal pile runoff, ash transport water, domestic wastewater, and low volume waste shall be discharged into o
the ash settling pond.
The pH shall not be less than 6.0 standard units nor greater than 9 0 standard units and shall be monitored 2/month at the effluent by
grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Permit No. NCO004774
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
outfall serial number 002 Ash Settling Pond discharge. Such discharges shall be limited and monitored by the Permittee as specified
below:
Effluent Cha,racterlstics Discharge Limitations Monitoring Requirements
Lbs da Units (Specify)easuremeCt Sample *Sample
Mon. Avg. Daily Max. Mon. Avg. Daily Max. Frequency Type Location
Flow
Oil and Grease
Total Suspended Solids****
Total Copper
Total Iron
Total Arsenic
Total Selenium
Acute Toxicity**
Total Nitrogen
Total Phosphorus
Pollutant ' Analysis
11 0 mg/I 15 0 mg/1
23 0 mg/I 74 0 mg/I
1 0 mg/I 1 0 mg/I
1 0 mg/I 1 0 mg/I
Weekly
Pump Logs or E
Similar readings
2/month
Grab E
2/month
Grab F_
2/month
Grab E
2/month
Grab E
Quarterly
Grab E
Quarterly
Grab E
Quarterly
Grab E
Monthly
Grab E
Monthly
Grab F_
Annually
E
* Sample Locations. E - Effluent
Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with an other waste stream
** Acute Toxicity (Daphnrd 48 hr.) LC50 60%, March, June, September, and December; See Part III,
Condition P.
** See Part III, Condition Q.
**** Monthly average of 43 mg/1 is permitted provided that the Permittee can satisfactorily demonstrate the the difference between
23 mg/1 and 43 mg/1 is due to the concentration of total suspended solids in the intake water.
The metal cleaning waste, coal pile runoff, ash transport water, domestic wastewater, and low volume waste shall be discharged into o
the ash settling pond.
The PH shall not be less than 6 0 standard units nor gicater than 9 0 standard units and shall be monitored 2/month at the effluent by
grab sample
There shall be no discharge of floating solids or visible foam in other than trace amounts.

A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Permit No. NC0005088
During the period beginning on the effective date of the pemiit and lasting until expiration, the Permittee is authorized to discharge from
outfall serial number 002 Ash Settling Pond discharge. Such discharges shall be limited and monitored by the Permittee as specified
below:
Effluent Characteristics Discharge Limitations Monitoring Requirements
Lbs/day Units (Specif Measurement Sample *Sample
Mon. Avg. Dally Max. Mon, Ava. Daily Max. Frequency Type Location
Flow
Weekly
Pump Logs or E
Similar readings
Oil and Grease
15 0 mg/I
20 0
mg/l
2/month
Grab E
Total Suspended Solids"*`
30 0 mg/I
99 0
mg/I
2/month
Grab E
Total Copper
1 0 mg/l
1 0
mg/I
2/month
Grab E
Total Iron
1 0 mg/I
1 0
mg/I
2/month
Grab E
Total Arsenic
1100 0
µg/I
2/month
Grab E
Total Selenium
220 0
µg/I
2/month
Grab E
Chronic Toxicity"
Quarterly
Grab E
Pollutant Analysis "'
Annually
E
Total Nitrogen (NO2 + NO3 + TKN)
Quarterly
Grab E
Total Phosphorus
Quarterly
Grab E
* Sample Locations: E - Effluent
Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with an other waste stream.
** Chronic Toxicity (Cenodaphnia) P/F at 5%, March, June, September, and December; See Part III, Condition Q.
x** See Part III, Condition R.
" * Monthly average of 50 mg/l is permitted provided that the Permittee can Satisfactorily demonstrate the the difference between
30 mg/l, and 50 mg/l is due to the concentration of total suspended solids in the intake water.
The metal cleaning waste, coal pile runoff, ash transport water, domestic wastewater, and low volume waste shall be discharged into o
the ash settling pond.
The pH shall not be less than 6.0 standard units nor greater than 9 0 standard units and shall be monitored 2/month at the effluent by
grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts

A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Permit No. NC0003468
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from
be] ow outfall serial number 002 Ash Settling Pond discharge Such discharges shall be limited and monitored by the Permittee as specified
Effluent Characteristics Discharge Limitations Monitoring Requirements
Lbs/d" Units lS ecif) Measurement Sample *Sample
Ion. Avg,. Daily Max. Mon. Avg. Daily Max. Frequency Type Location
Flow
Oil and Grease
Total Suspended Solids****
Total Copper !
Total Iron
Total Arsenic
Total Selenium
Acute Toxicity**
Mercury
Sulfate
Sulfide
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Pollutant Analysis ***
Purnp Logs or
Similar readings
Grab
G rab
Grab
Grab
Grab
Grab
Grab
G rab
Grab
Grab
Grab
G rab
* Sample Locations: E - Effluent, U -Upstream 100 feet, D -Downstream 1000 feet
Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with an other waste stream
** Acute Toxicity (Daphnid 48 hr.) LC50 88%, March, June, September, December, See Part III, Condition P
*** See Part III, Condition T
**** Monthly average of 49 mg/1 is permitted provided that the Permittee can satisfactorily demonstrate the the difference between
29 mg/l and 49 mg/l is due to the concentration of total suspended solids in the intake water
E
E
E
E
E,U,D
E,U,D
E
U, D
E
E
E
E
E
The metal cleaning waste, coal pile runoff, ash transport water, domestic wastewater, and low volume waste shall be discharged into o
the ash settling pond.
The pH shall not be less than 6 0 standard units nor greater than 9 0 standard units and shall be monitored 2/month at the effluent by
grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts
Weekly
14 0 mg/I
19 0 mg/I
2/month
29 0 mg/I
96 0 mg/I
2/month
1 0 mg/I
1 0 mg/I
2/month
1 0 mg/1
1 0 mg/I
2/month
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Quarterly
Annually
Purnp Logs or
Similar readings
Grab
G rab
Grab
Grab
Grab
Grab
Grab
G rab
Grab
Grab
Grab
G rab
* Sample Locations: E - Effluent, U -Upstream 100 feet, D -Downstream 1000 feet
Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with an other waste stream
** Acute Toxicity (Daphnid 48 hr.) LC50 88%, March, June, September, December, See Part III, Condition P
*** See Part III, Condition T
**** Monthly average of 49 mg/1 is permitted provided that the Permittee can satisfactorily demonstrate the the difference between
29 mg/l and 49 mg/l is due to the concentration of total suspended solids in the intake water
E
E
E
E
E,U,D
E,U,D
E
U, D
E
E
E
E
E
The metal cleaning waste, coal pile runoff, ash transport water, domestic wastewater, and low volume waste shall be discharged into o
the ash settling pond.
The pH shall not be less than 6 0 standard units nor greater than 9 0 standard units and shall be monitored 2/month at the effluent by
grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts

/f
A (1) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL Permit No. NC0004961
During the period beginning on the effective date of the permit and Iasting until expiration, the Permittee is authorized to discharge from
below outfall serial number 002 Ash Settling Pond discharge Such discharges shall be limited and monitored by the Permittee as specified
Effluent Characteristics Discharge Limitations Monitoring Requirements
Lbs/day Units (Specify) Measurement Sample *Sample
Mon. Avg. Daily Max. Mon. Avg. Daily Max. Frequency 'type Location
Flow
Total Suspended Solids****
Oil and Grease
Total Copper
Total Iron
Total Arsenic
Total Selenium
Total Nitrogen (NO2 + NO3 + TKN)
Total Phosphorus
Chronic Toxicity"
Pollutant Analysis ***
23 0 mg/I
75 0
mg/1
11 0 mg/I
15 0
mg/I
1 0 mg/1
1 0
mg/I
1 0 mg/I
1 0
mg/I
2/month
480 0
tag/I
Weekly
Pump Logs or E
Similar readings
2/month
Grab E
2/month
Grab E
2/month
Grab E
2/month
Grab E
2/month
Grab E
Monthly
Grab E
Monthly
Grab E
Monthly
Grab E
Quarterly
Grab E
Annually
E
* Sample Locations: E - Effluent
Effluent sampling shall be conducted at the discharge from the ash settling pond prior to mixing with an other waste stream
** Chronic Toxicity (Ceriodaphnia) P/F at 10%; January, April, July, October; See Part III, Condition Q. '
*** See Part III, Condition R.
**** Monthly average of 43 mg/1 is permitted provided that the Permittee can satisfactorily demonstrate the the difference between
23 mg/1 and 43 mg/1 is due to the concentration of total suspended solids in the intake water
The metal cleaning waste, coal pile runoff, ash transport water, domestic wastewater, and low volume waste shall be discharged into o
the ash settling pond.
The pH shall not be less than 6 0 standard units nor greater than 9 0 standard units and shall be monitored 2/month at the effluent by
grab sample.
There shall be no discharge of floating solids or visible foam in other than trace amounts