NC0004987_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 Feng Road
Huntersville, NC 28078-7929
Dear Mr. Carter:
ALT!X
r4jo A
C7EHNF1
June 16, 1993
Subject: Request for Reduction of Monitoring
Duke Power Company
NC0004979-Allen Steam Station
NC0004774-Buck Steam Station
NC0005088-Cliffside Steam Station
NC0003468-Dan River Steam_ Station
NC000498.7-Marshall Steam 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 1 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 (N0004987) 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 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 1508 of the North Carolina General Statutes, Land filed
with the Office of Administrative Hearings, Post Office Drawer 27.447, Raleigh, North Carolina
27611-7447.. Unless such demand is made, this .decision shall be final and binding.
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

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.
Sin/c�erely,
►. Preston H 40d, Jr. P.E.
cc. Jim Reid, As 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)

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
(Specify)
Measurement.
Sample
*Sample
Mon.
Avg. Daily Max. Mon, Avg.
Daily Max.
Frequency
Type
Location
Flow
Weekly
Pump Logs or
E
Similar readings
Oil and Grease
15.0 mg/I
20.0
mg/I
2/month
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 -
21month
Grab
E
Total Iron
1.0 mg/I
1.0
mg/I
2/month
Grab
E
Total Arsenic
450.0
µg/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
* Sample Locations: E - Effluent
** Chronic Toxicity (Ceriodaphnia) P/F at 11%; January, April, July, and October; See Part III, Condition P.
*** See Part III, Condition Q.
**** 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/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. NC0004774
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 - Characteristics Discharge
Limitations
Monitoring
Reaulrementa
Lbs/day
Units
(Specify)
Measurement
Sample *Sample
Mon: Avg.Dally Max.
Mon. Avg
Dally Max.
Frequency
type Location
Flow
r
Weekly
Pump Logs or
E
Similar readings
Oil and Grease
11.0 mg/l
15.0 mg/1
2/month
Grab
E
Total Suspended Solids""
23.0 mg/i
74.0 mg1I
2/month
Grab
E
Total Copper
1.0 mg/1
1.0 mgJi
2/month
Grab
E
Total Iron .
1.0 mg/I
1.0 mg/I.
2/month'
Grab`
E
Total Arsenic
Quarterly
Grab
E
Total Selenium
Quarterly
Grab
E
Acute Toxicity"
Quarterly
Grab
E `
Total Nitrogen
Monthly
Grab
E
Total Phosphorus
Monthly
Grab
E
Pollutant Analysis "'
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 (Daphnid 48 hr.) LC50 60%; March, June, September, and December; -See Part III,
Condition P.
*** See Part III, Condition Q.
**** Monthly average of 43 mg/l is permitted provided that the Permittee can satisfactorily demonstrate the the difference. between
23 mg/l and 43 mg&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. NC0005088
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 Cheracterlstics
Discharge Limitations
Monitoring
Requirements
Lbs/day
Units
(S eg clfv).
Measurement
Sale "Samg_Ie
Mon. Avg. Dally
Max. Mona Avg.
Dally Max.
Freauencv
It" Location
Flow
Weekly
Pump Logs or
E
Similar readings
Oil and Grease
15.0 mg/I
20.0
mg/I
2/month
•Grab
E
Total Suspended Solids****
30.0 mg/I
99.0
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
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 (Ceriodaphnia) P/F at 5%; March, June, September, and December; See Part III, Condition Q.
*** 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
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/da v
Units (Specify)
Measurement
Sample *SamPle
Mon. Avg Daily Max.
Mon. Avg.
Daily
Max.
Frequency
Type Location
Flow
Weekly
Pump Logs or E
Similar readings
Oil and Grease
14.0 mg/I
19.0
mg/I
2/month
Grab E
Total Suspended Solids****
29.0 mg/I
96.0
mg/I
2/month
Grab E
Total Copper
1.0 mg/I
1.0
mg/I
2/month
Grab E
Total Iron
1.0 m.g/I
1.0
mg/I
2/month
Grab E
Total Arsenic
Quarterly
Grab E,U,D
Total Selenium
Quarterly
Grab E,U,D
Acute Toxicity**
Quarterly
Grab E
Mercury
Quarterly
Grab U,D
Sulfate
Quarterly
Grab E
Sulfide
Quarterly
Grab E
Total Nitrogen (NO2 + NO3 + TKN)
Quarterly
Grab E
Total Phosphorus.
Quarterly
Grab E.
Pollutant Analysis '**
Annually
E
* 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/1 and 49 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. NC0004961
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 Characteristics
Lbs/da
Mon. Avq. Daily Max.
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 ***
Discharge
Limitations
Monitoring
. Requirements
Units_
(Specify)
Measurement
Sample
*Samele
Mon. Avg.
Daily
Max.
Frequency
Type
L.ocat'ion
Weekly
Pump Logs or
E
Similar readings
23.0
mg/i
75.0
mg/I
2/month
Grab
E
11.0
mg/I
15.0
mg/1
2/month
Grab
E
1.0
mg/.I
1.0
mg/I
2/month
Grab
E
1.0
mg/I
1.0
mg/I
2/month
Grab
E
480.0
µg/I
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 0
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.