JIft Duke 

[OPowers 

D.M. JAMIL 

Vice President 

Duke Power 

Catawba Nuclear Station 

4800 Concord Road / CNO1VP 

York, SC 29745-9635 

803 831 4251 

803 831 3221 lax 

June 22, 2005 

U.S. Nuclear Regulatory Commission 

Attention: Document Control Desk 

Washington, D.C. 20555 

Subject: Catawba Nuclear Station, Units 1 and 2 

Docket Nos. 50-413 and 50-414 

National Pollutant Discharge Elimination System (NPDES) 

Permit No. SC0004278 

The National Pollutant Discharge Elimination System (NPDES) Permit for Discharge to 

Surface Waters for Catawba Nuclear Station was modified by the State of South Carolina on 

June 1, 2005. This permit was specifically modified to allow discharge to the nuclear service 

water pond with the addition of Outfall 006. A copy of the modified NPDES permit is 

attached. 

Any questions concerning this report should be directed to Margot Rott at 803.831.3180. 

Sincerely, 

Dhiaa M. Jamil 

Enclosure 

xc: (* w/o enclosure) 

W. D. Travers, Regional Administrator, Region II 

S. E. Peters, NRR Project Manager 

E. F. Guthrie, Senior Resident Inspector 

Catawba 

Nuclear 

Station2 Oth Anniversary 

1985-2005 

www.dukepower.corn 

PWDuke D.M. JAMIL

OrPowere Vice President

Duke Power

Catawba Nuclear Station

4800 Concord Road / CNOI VP

York, SC 29745-9635

803 831 4251

803 831 3221 fax

June 22, 2005

U.S. Nuclear Regulatory Commission

Attention: Document Control Desk

Washington, D.C. 20555

Subject: Catawba Nuclear Station, Units 1 and 2

Docket Nos. 50413 and 50414

National Pollutant Discharge Elimination System (NPDES)

Permit No. SC0004278

The National Pollutant Discharge Elimination System (NPDES) Permit for Discharge to

Surface Waters for Catawba Nuclear Station was modified by the State of South Carolina on

June 1, 2005. This permit was specifically modified to allow discharge to the nuclear service

water pond with the addition of Outfall 006. A copy of the modified NPDES permit is

attached.

Any questions concerning this report should be directed to Margot Rott at 803.831.3180.

Sincerely,

Dhiaa M. Jamil

Enclosure

xc: (* w/o enclosure)

W. D. Travers, Regional Administrator, Region II

S. E. Peters, NRR Project Manager

E. F. Guthrie, Senior Resident Inspector

amlo

Catawba

Nudear

Statiofl20th

Anniversary www. dukepower. corn 1985-2005
Expires: June 30, 2005 

Permit No.: SC0004278 

Issued: April 30, 2001 

Effective: June 1, 2001 

Modification: June 1, 2005 

DHEC 

PROMOTE PROTECT PROTECT PROSPER 

South Carolina Department of Health 

and Environmental Control 

National Pollutant Discharge 

Elimination System Permit 

for Discharge to Surface Waters 

This Permit Certifies That 

Duke Energy Corporation 

Catawba Nuclear Plant 

has been granted permission to discharge from a facility located at 

Newport, South Carolina 

York County 

to receiving waters named 

Lake Wylie 

in accordance with limitations, monitoring requirements and other conditions set 

forth in Parts I, II, and III hereof. This permit is issued in accordance with the 

provisions of the Pollution Control Act of South Carolina (S.C. Code Sections 48-

1-10 et seq., 1976), Regulation 61-9 and with the provisions of the Federal Clean 

Water Act (PL 92-500), as amended, 33 U.S.C. 1251 et seq., the "Act." 

Marion F. Sadler, Jr., Direo r 

Industrial, Agricultural, and Storm Water Permitting Division 

Bureau of Water 

IP 

• 

• 

H RD E C

PROMOTE PROTECT ROSPER

South Carolina Department of Health

and Environmental Control

ATatiolal PollutantDischarge

Elimina t1011 System Permit

for Discharge to Surface Waters

This Permit Certifies That

Duke Energy Corporation

Catawba Nuclear Plant

has been granted permission to discharge from a facility located at

Newport, South Carolina

York County

to receiving waters named

Lake Wylie

in accordance with limitations, monitoring requirements and other conditions set

forth in Parts I, II, and III hereof. This permit is issued in accordance with the

provisions of the Pollution Control Act of South Carolina (S.C. Code Sections 48-

1-10 et seq., 1976), Regulation 61-9 and with the provisions of the Federal Clean

Water Act (PL 92-500), as amended, 33 U.S.C. 1251 et seq., the "Act."

Marion F. aer, r., Dir r

Industrial, Agricultural, and Storm Water Permitting Division

Bureau of Water

Issued: April 30, 2001 Expires: June 30, 2005

Effective: June 1, 2001 Permit No.: SC0004278

Modification: June 1, 2005
DISCHARGE LIMITATIONS MONITORING REQUIREMENTS 

Other Units (Specify) 

Weekly Monthly Daily 

Average Average Maximum 

Daily 

Average 

MR 

0.011 mg/1 

MR 

0.019 mg/1 

4.3 mg/1 

MR 

MR 

MR 

MR 

MR 

MR 

5.6°C(10.0°F) 

7.8°C(14.0°F) 

EFFLUENT CHARACTERISTICS 

Flow (MGD) . 

Total Residual Chlorine (TRC)B 

Nitrite (NO2) 

Copper, total recoverable° 

Intake Temperature °C(°F) 

Discharge Temperature °C(°F) 

• Temperature rise (April-September) 

Temperature rise (October-March) 

Measurement Sample 

Frequency Type 

Daily Continuous" 

1/week Multiple Grabsc 

1/occurrence Grab 

1/morith Grab 

Daily Continuous 

Daily Continuous 

Daily Calculation 

Daily Calculation 

11.4, 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 

1. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized 

to discharge from outfall(s) serial nurnber(s) 001: once through cooling water, nuclear service Water, cooling tower blowdown 

(discharged via internal Outfall 005) and liquid radiological wastes (treated and discharged via internal Outfall 004) to Lake Wylie. 

Such discharge shall be limited and monitored by the Permittee as specified below: 

"See Part III, Special Condition #14 MR = Monitor and Report 

°See Part III, Special Condition #15 & 16 Based on a flow of 73.6 MGD 

cSee Part III, Special Condition #17 

DSee Part III, Special Condition #23 

No chromium and zinc based maintenance chemicals will be allowed in the cooling tower. 

a. The pH.shall be monitoredand reported once per week by grab sample. 

b. There shall be no discharge of floating solids or visible foam in other than trace amounts; nor, 

shall the effluent cause a visible sheen on the receiving waters. 

• , 

c. Samples taken in Compliance with the monitoring requirements specified above shall be taken at the follPwing location(s): 

The intake temperature shall be monitored at or near the plant intake. All other parameters shall be monitored at or near 

the point of discharge from Outfall 001 piior to mixing with the receiving waters, unless otherwise specified above. 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

1. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized

to discharge from outfall(s) serial nuriber(s) 001: once through cooling water, nuclear service w~ater, cooling tower blowdown

(discharged via internal Outfall 005) and liquid radiological wastes (treated and discharged via internal Outfall 004) to Lake Wylie.

Such discharge shall be limited and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS

Other Units (Specify)

Daily Weekly Monthly

Average Average Average

- -. .. MR

- - 0.011 mg/I

MONITORING REQUIREMENTS

Flow (MGD)

Total Residual Chlorine (TRC)B

Nitrite (NO2)

Copper, total recoverable0

Intake Temperature 0C(CF)

: Discharge Temperature 'C( 0F)

Temperature rise (April-September)

:Temperature rise (October-March)

Daily

Maximum

MR

0.019 mg/I

4.3 mg/I

MR

MR

MR

)0F) - )

0F) -

Measurement

Frequency

Daily

1/week

1/occurrence

1/month

Daily

Daily

Daily

Daily

Sample

Type

ContinuousA

Multiple Grabsc

Grab

Grab

Continuous*

Continuous

Calculation

Calculation

MR

- --MR:

' ' MR

- ' '' l 5.60C(10.C

-- 7.80C(14.(

ASee Part III, Special Condition #14 MR = Monitor and Report

'See Part III, Special Condition #15 & 16 Based on a flow of 73.6 MGD

CS66 Part III, Special Condition #17

DSee Part III, Special Condition #23

No chromium and zinc based maintenance chemicals will be allowed in the cooling tower.

a. The pH shall be monitored and reported once per week by'grab sample.

b. There'shall be no discharge of floating solids or visible foam in other than trace amounts; nor,

shall the effluent cause a visible sheen on the receiving waters.

c. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s):

The intake temperature shall be monitored at or near the plant intake. All other parameters shall be monitored at or near

the point of discharge from Outfall 001 prior to mixing with the receiving waters, unless otherwise specified above.

id o5

CD

9a rj

(n
(-4 

EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 

2. During the period beginning on the effective date of this permit and lasting through the expiration date,. the pennittee is authorized 

to discharge from outfall(s) serial number(s) 002: low volume wastes, miscellaneous dilute wastewater, and chemical metal cleaning 

wastes to Lake Wylie. 

Such discharge shall be limited and monitored by the Permittee as specified below: 

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING REQUIREMENTS 

(lbs/day) • Other Units (Specify) 

Monthly Daily. .,,Monthly •• '`• • Daily Measurement 

Average Maximum Average Maximum Frequency 

Flow (MGD) 

Total Residual Chlorine (TRC)13 

Biocheinical Oxygen Demand (5-day) 

Oil and Grease 

Total SUspended Solids 

Copper, total 

Iron, total 

Hydrazine 

Nitrite (NO2) 

MR 4 

0.611.mg/1 

MR 

15 mg/1 

30 mg/1 

0.0125 mg/1 

0.645 mg/1 

MR 

0.019 mg/1 

MR 

20 mg/1 

100 mg/1 

0.0125 mg/1 

0.645 mg/1 

0.077 mg/1 

4.3 . mg/1 

1/week 

1/c 

1/month 

1/month 

1/month 

1/D 

1/o 

1/E 

1/E. 

Instantaneous" 

Grab 

Grab 

Grab 

Grab 

Grab 

Grab 

Grab 

Grab 

Sample 

Type 

"See Part III, Special Condition #14 

°See Part III, Sk.cial Condition #15 

cAfter treatment 1,Vith hypochlorite has occurred in a WC pond, sampling for TRC shall be conducted once per day over a two day period 

during discharge from the WC pond. 

°Sampling shall be conducted once per chemical metal cleaning occurrence of discharge of these substances through Outfall 002 but need 

not be more than twice per month. • 

ESampling shall be conducted once per occurrence of discharge of these substances through Outfall 002 but need not be more than twice per month. 

Based on an average flow of 1.41 MGD MR = Monitor and Report 

a. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored and reported 

once per, week by grab sample. 

• 

b. There shall be no discharge of floating solids or visible foam in other than trace amounts; nor, shall the effluent 

cause a visible sheen on the receiving waters. • 

c. Samples taken in complianF:e with the monitoring requirements,specified above shall be taken at the following location(s): 

at the point of discharge from the conventional waste treatment (WC) system but prior to mixing with the receiving waters. 

a. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS . - -: . *- . -: . - - - -- : . -

2. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized

to discharge from outfall(s) serial number(s) 002: low volume wastes, miscellaneous dilute wastewater, and chemical metal cleaning

wastes to Lake Wylie.- -

Such discharge shall be limited and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS;- DISCHARGE LIMITATIONS - MONlTO

(lbs/day) ' Other Units (Specify)

nthly MDaily. u Monthly ; MDaily

- Average Maximum Average Maximum

IRING REQUIREMENTS

Flow (MGD)

Total Residual Chlorine (TRC)B

Biochemical Oxygen Demand (5-day)

Oil and Grease

Total Suspended Solids

Copper, total

Iron, total

Hydrazine

Nitrite (NO2)

0.011 mg/I

MR

15 mg/l

30 mg/l

0.0125 mg/i

0.645 mg/I

MR.-

0.019 mg/I

MR

20 mg/I

100 mg/I

0.0125 mg/I

0.645 mg/I

0.077 mg/I

4.3 : mg/I

Measurement

Frequency

1/week

.1/c

1/month

l/month

1/month

I/D

I/D

1E

I/E

Sample

Type

InstantaneousA

Grab

Grab

Grab

Grab

Grab

Grab

Grab

Grab

ASee Part .II,Special Condition #14

BSee Part II, Special Condition #15

CAfter ireatmeit with hypochlorite has occurred in a WC pond, sampling for TRC shall be conducted once per day over a two day period

during discharge from the WC pond.

DSampling shall be conducted once per chemical metal cleaning occurrence of discharge of these substances through Outfall 002 but need

not be more than twice per month.

ESampling shall be conducted once per occurrence of discharge of these substances through Outfall 002 but need not be more than twice per month.

Based on an average flow of 1.41 MGD .. .. I

MR = Monitor and Report

'IO 'IC 'I

a o

00

a. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored and reported

once per week by grab sample.

b. There shall be no discharge of floating solids or visible foam in other than trace amounts; nor, shall the effluent

cause a visible sheen on the receiving waters.

c. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s):

at the point of discharge from the conventional waste treatment (WC) system but prior to mixing with the receiving waters.

a
A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 

3. During the period beginning on the effective date of this permit and lasting through the expiration dale, the permittee is authorized 

to discharge from outfall(s) serial number(s) 003: treated sanitary seWerage to Lake Wylie. '7' 

Such discharge shall be limited and monitored by the Permittee as specified below: 

DISCHARGE LIMITATIONS 

(lbs/day) Other Units (Specify) 

Monthly Daily Monthly Daily 

Average Maximum Average Maximum 

Flow (MGD) 

Total Residual Chlorine (TRC). 

Total Suspended Solids 

Carbonaceous Biochemical 

Oxygen Demand (5-day) 

Fecal Coliform 

Dissolved Oxygen 

Phosphorous, total 

• "See Part III, Special Condition #14 

BSampling for total residual chlorine shall be conducted once per week when chlorine is 

MONITORING REQUIREMENTS 

Measurement Sample 

Frequency Type 

1/month Instantaneous" 

1/weele Grab 

1/month 24Hr. Composite 

1/month 24Hr. Composite 

1/month Grab 

1/month Grab 

1/month Grab 

:. • 

EFFLUENT CHARACTERISTICS 

MR MR 

0.5 mg/1 1.0 mg/1 

90 mg/1 135 mg/I 

25 mg/I 50 mg/1S 

: 200/100 ml ,400/100m1 

at a,minimum of 1.0 mg /1 

MR : MR , 

used in the sanitary treatment facility. 

MR = Monitor and Report Based on an average flow of 0.028 MGD 

a. The pH shall not be less than 6.0 standird units nor greater than 9.0 standard units and shall be monitored and reported 

once per week by grab sample: ' 

b. There shall be no discharge of floating solids or visible foam in other than trace amounts; nor, shall the effluent cause 

a visible sheen on the receivingvaters: 

c. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s): 

at the point of discharge from the sewage treatment plant prior to mixing with the receiving waters. 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

3. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized

to discharge from outfall(s) serial number(s) 003: treated sanitary sewerage to Lake Wylie.

Such discharge shall be limited and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS

(lbs/d

-Monthly

Average

- DISCHARGE LIMITATIONS

ay) Other Units (Specify)

Daily Monthly Daily

Maximum Average Maximum

MONITORING REQUIREMENTS .I

Measurement Sample

Frequency Type

Flow (MGD)

Total Residual Chlorine (TRC).'

Total Suspended Solids

Carbonaceous Biochemical

Oxygen Demand (5-day)

Fecal Coliform

Dissolved Oxygen

Phosphorous, total

. .. I 1. I .. . - MR

0.5 mg/I

90 mg/l

MR

1.0 mg/I

135 mg/I

1/month

I/week'

1/month

I!month

1/month

1/month

1/month

InstantaneousA

Grab

24Hr. Composite

24Hr. Composite

Grab :

Grab

Grab

- 25 mg/I 50 mg/I-

- 200/100 ml 400/lOOml

- at a minimum of 1.0 mg/l

- MR MR.

ASee Part III, Special Condition #14 -

'Sampling for total residual chlorine shall be conducted once per week when chlorine is used

i sIt , e f

in the sanitary treatment facility.

MR = Monitor and Report Based on an average flow of 0.028 MGD

I .. .... I 

a. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored and reported

once per week by grab sample:. '

b. There shall be no discharge of floating solids or visible foam in other than trace amounts; nor, shall the 'effluent cause

a visible sheen on the receiving waters. -

c. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s):

at the point of discharge from the sewage treatment plant prior to mixing with the receiving waters.

8 CD o' 0

00
L. EFFLUENT LIMITATIONS ANDMONITORING:REQUIREMENTS 

4. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized 

to discharge from outfall(s) serial number(s) 004: liquid radiological wastes via Outfall 001 to Lake Wylie. 

Such discharge shall be limited and monitored by the Permittee as specified below: 

EFFLUENT CHARACTERISTICS - DISCHARGE LIMITATIONS 

(lbs/day) • Other Units (Specify) 

Monthly Daily , Monthly: - • Daily !. Measurement Sample 

Average Maximum Average Maximum Frequency Type, 

. . 

Flow (MGD) MR MR 1/occurrence Estimate' 

copper,,total. 1.0 mg/1 1.0 mg/1 1/occurrences Grab 

Iron,,total 1.0 mg/1 1.0 mg/1 1/occurrences Grab 

Based on an average flow of 0.009 MGD MR = Monitor and Report 

'See Part III, Special Condition #14 

BSampling- shall be conducted once per occurrence of chemical metal cleaning through Outfall 004. 

a. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s): 

at the point of discharge from the liquid radiological waste treatment plant but prior to mixing with other wastewaters 

at Outfall 001. 

This &charge is regulated by the Nuclear.Regulatory Commission (NRC) and is monitored per their specifications and 

the results are reported to NRC. 

MONITORING REQUIREMENTS 

I

. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS,

4. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized

to discharge from outfall(s) serial number(s) 004: liquid radiological wastes via Outfall 001 to Lake Wylie;

Such discharge shall be limited and monitored by the Permittee as specified below: EFFLUETCA , .RT . .EISIC

EFFLUENT CHARACTERISTICS

Month]

Averap

DISCHARGE LIMITATIONS

(lbs/day) Other Units (Specify)

ly Daily Monthly -- Dai

,e Maximum Average Ma

MR

MONITORING REQUIREMENTS

ly

Ximum

MR

* Measurement

Frequency

1/occurrenceB

Sample

Type

Flow (MGD) . ; . EstimateA

Copper, total.

Iron,. total

1.0 mg/l

1.0 mg/l

1.0 mg/I

1.0 mg/I

1/occurrenceB

I/occurrenceB

Grab

Grab

Based on an average flow of 0.009 MGD MR = Monitor and Report . . i . . !

ASee Part III, Special Condition #14

Saxnpling shall be conducted once per occurrence of chemical metal cleaning through Outfall 004.

a. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s):

at the point of discharge from the liquid radiological waste treatment plant but prior to mixing with other wastewaters

at Outfall 001.- -

'O It CD0

9-C

00

IV

This discharge is regulated by the Nuclear-Regulatory Commission (NRC) and is monitored per their specifications and

the results are reported to NRC.
t. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 

5. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized 

to discharge from outfall(s) serial number(s) 005: cooling tower blowdown via Outfall 001 to Lake Wylie. 

Such discharge shall be limited and monitored by the Permittee as specified below: 

DISCHARGE LIMITATIONS MONITORING REQUIREMENTS 

(lbs/day) Other Units (Specify) 

Monthly Daily Monthly Daily Measurement Sample 

Average Maximum Average Maximum Frequency Type 

EFFLUENT CHARACTERISTICS 

Flow (MGD) MR . MR Weekly Estimate" 

Free Available Chlorine (FAC) - 0.2 mg/1 0.5 mg/1 1/week Multiple Grabs' 

"See Part III, Special Condition #14 . 

'See Part III, Special Condition #17 

MR = Monitor and Report 

No chromium and zinc based maintenance cheniicals will be allowed in the cooling tower. 

a. The Permittee shall annually, through monitoring or engineering calculations, certify that the other 124 priority pollutants 

(besides chromium and zinc) are present at no detectable amount in the cooling tower blowdown discharge as .a result of the 

addition of cooling tower maintenance chemicals. - 

b. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored and reported 

once per week by grab sample. , 

•• 

c. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s): 

at the point of discharge from the cooling towers prior to mixing with wastewaters at Outfall 001. 

k. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

5. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized

to discharge from outfall(s) serial number(s) 005: cooling tower blowdown via Outfall 001 to Uke Wylie.

Such discharge shall be limited and monitored by the Permittee as specified below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING REQUIREMENTS

(lbs/day) Other Units (Specify),

Monthly Daily, Monthly Daily Measurement Sample

Average Maximum Average Maximum Frequency Type

Flow (MGD) ,. MR- MR Weekly Estimate

Free Available Chlorine (FAC) - - - 0.2 mg/I 0.5 mg/l 1/week Multiple GrabsB

ASee Part III, Special Condition #14.

'See Part'III, Special Condition #17

MR Monitor and Report

No chromium and zinc based maintenance chenmicals will be allowed in the cooling tower.

a. The Permittee shall annually, through monitoring or engineering calculations, certify that the other 124 -priority pollutants' >

(besides chromium and zinc) are present at no detectable amount in the cooling tower blowdown discharge as.a result of the a H

addition of cooling tower maintenance chemicals. -, ZaC

b. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored and reported

once per week by grab sample.- . - , ,

c. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s): 0

at the point of discharge from the cooling towers prior to mixing with wastewaters at Outfall 001.
A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS 

6. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized 

to discharge from outfall(s) serial number(s) 006: once through non-contact cooling water to the Standby Nuclear Service Water 

Pond to Lake Wylie. 

Such discharge shall be limited and monitored by the permittee as specified below: 

EFFLUENT CHARACTERISTICS , DISCHARGE LIMITATIONS MONITORING REQUIREMENTS 

kg/day (lbs/day) Other Units (Specify) 

Monthly Daily Monthly Daily. . Measurement Sample 

Average Maximum Average Maximum Frequency" Type 

Flow (MGD) MR MR 1/occurrence Estimate 

Intake Temperature °C(°F) MR MR 1/occiirrence Grab 

Discharge TeMperature °C(°F)" MR MR 1/occurrence Grab 

Temperature Rise°C(°F)" MR 1/occurrence Calculation 

Total Residual Chlorine (TRC)BE 0.011 mg/1 0.019 mg/I 1/ocCurrence Multiple Grab? 

'Since Outfall 006 is only used intermittently, the samples shall be taken during the period when the Standby Nuclear Service 

Water Pond is being used, but need not be more than once per week. 

'Monitoring for total.residual chlorine shall be required when chlorine is being used. 

CSee Part III, Special Condition #14 

'See Part III, Special Condition #24 

'See Part III, Special Condition #15 & 16 - MR = Monitor and Report Results 

FSee Part III, Special Condition #17 Based on a flow of 27.4. MGD 

. I - 

a. The pH shall not be less than 6.0 standard units nor greater. than 9.0 standard units and shall be monitored by grab sample 

at a frequency of once per occurrence. 

b. There shall be no discharge of floating solids or visible foam in other than trace amounts; nor, shall the effluent cause 

a visible sheen on the receiving waters. 

Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s): 

The intake temperature shall be monitored at or near the plant intake. All'other parameters shall be monitored at or near 

the point of discharge from Outfall 006 prior to mixing with the receiving waters, unless otherwise specified above. 

A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS

6. During the period beginning on the effective date of this permit and lasting through the expiration date, the permittee is authorized

to discharge from outfall(s) serial number(s) 006: once through non-contact cooling water to the Standby Nuclear Service Water

Pond to Lake Wylie.

Such discharge shall be limited and monitored by the permittee as specified below:

EFFLUENT CHARACTERISTICS DISCHARGE LIMITATIONS MONITORING REQUIREMENTS

kg/day (lbs/day) Other Units (Specify)

Monthly Daily Monthly Daily Measurement Sample

Average Maximum Average Maximum FrequencyA ype

Flow (MGD) - - MR MR 1/occurrence EstimateC

Intake Temperature OC(OF) - - MR MR 1/occurrence Grab

Discharge Temperature IC(OF). - - MR MR 1/occurrence Grab

Temperature RiseOC(°F)D - - MR 1/occurrence Calculation

Total Residual Chlorine (TRC)BE - - 0.011 mg/l 0.019 mg!l 1/occurrence Multiple GrabsF

ASince Outfall 006 is only used intermittently, the samples shall be taken during the period when the Standby Nuclear Service

Water Pond is being used, but need not be more than once per week.

BMonitoring for total-residual chlorine shall be required when chlorine is being used.

CSee Part III, Special Condition #14

DSee Part III, Special Condition #24 -

ESee Part III, Special Condition #15 & 16 MR = Monitor and Report Results

FSee Part III, Special Condition #17 Based on a flow of 27.4 MGD X Q

a. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored by grab sample z _, A 0 at a frequency of once per occurrences..

b. There shall be no discharge of floating solids or visible foam in other than trace amounts; nor, shall the effluent cause

a visible sheen on the receiving waters.i -

00

c. Samples taken in compliance with the monitoring requirements specified above shall be taken at the following location(s):

The intake temperature shall be monitored at or near the plant intake. All'other parameters shall be monitored at or near

the point of discharge from Outfall 006 prior to mixing with the receiving waters, unless otherwise specified above.

.
PART 

Page 8 of 27 

Permit No. SC0004278 

B. EFFLUENT TOXICITY LIMITATIONS AND MONITORING REQUIREMENTS 

1. During the period beginning on the effective date of this Permit and lasting through the expiration 

date, the permittee is authorized to discharge from outfall(s) serial number(s) 001i- once through 

cooling water, nuclear service water, cooling tower blowdown (discharged via internal Outfall 005) 

and liquid radiological wastes (treated and discharged via internal Outfall 004) to Lake Wylie. 

Such discharge shall be limited and monitored by the permittee as specified below: 

• : 

. , 

EFFLUENT 

DISCHARGE 

LIMITATIONS MONITORING REQUIREMENTS 

' CHARACTERISTICS 

' Monthly 

Average • 

, Daily 

Maximum 

Measurement 

. .Frequency 

Sample 

Type • 

Whole Effluent Toxicity 

Chronic Testing @ 

CTC=100% - 

. , 

01 

• 

. 

1/quarter 

24 hour composite 

, 

' Report "0" if test pasies or "1" if test fails in accordance with Part III.A.13 a, b, c 

a. Samples taken in compliance with the monitoring requirements specified above shall be taken of the following 

location(s): at the point of discharge from Outfall 001 prior to mixing with the receiving waters, unless 

otherwise specified above. 

PART I

Page 8 of 27

Permit No. SC0004278

B. EFFLUENT TOXICITY LIMITATIONS AND MONITORING REQUIREMENTS

1. During the period beginning on the effective date of this Permit and lasting through the expiration

date, the permittee is authorized to discharge from outfall(s) serial number(s).001i- once through

cooling water, nuclear service water, cooling tower blowdown.(discharged via internal Outfall 005)

and liquid radiological wastes (treated and discharged via internal Outfall 004) to Lake Wylie.

Such discharge shall be limited and monitored by the permittee as specified below: . .. k . .. . . .

DISCHARGE

EFhLUENT LIMITATIONS MIONITORING REQUIREMENTS

CHARACTERISTICS

Monthly Daily Measurement Sample

Average, Maximum ... Frequency Type

Whole Effluent Toxicity

Chronic Testing @ 24 hour composite

CTC=100% 01 lIquarter .

'Report 10" if test passes or "I" if test fails in accordance with Part III.A.13 a, b, c

a. Samples taken in compliance with the monitoring requirements.specified above shall be taken at the following

location(s): at the point of discharge from Outfall 001 prior to mixing with the'receiving waters, unless

otherwise specified above.
I it II 

PART I 

Page 9 of 27 

Permit No. SC0004278 

B. EFFLUENT TOXICITY LIMITATIONS AND MONITORING REQUIREMENTS 

2. During the period beginning on the effective date of this permit and lasting through the expiration 

date, the permittee is authorized to discharge from outfall(s) serial number(s) 002: low volume 

wastes, miscellaneous dilute wastewater, and metal cleaning wastes to Lake Wylie. 

Such discharge shall be limited and monitored by the permittee as specified below: 

1 .. .• EFFLUENT 

CHARACTERISTICS 

, • 

DISCHARGE 

LIMITATIONS 

• .. 

MONITORING REQUIREMENTS 

Monthly 

Average 

. Daily 

Maximum 

Measurement 

Frequency 

Sample 

Type 

Whole Effluent Toxicity 

Chronic Testing @ 

CTC =100% - Ot 1/quarter 

24 hour composite 

' Report "0" if test passes or "1" if test fails in accordance with Part III.A.13 a, b, c 

a. Due to the intermittent and variable duration of the batch discharges for Outfall 002, the sampling protocol 

for chronic testing is modified to allow Duke Power Company to conduct the chronic testing with only one 

or two samples in instances when flow is not available. 

b.Samples taken in compliance with the monitoring requirements specified above shall be taken at the following 

location(s): at the point of discharge from the conventional waste treatment (WC) system but prior to mixing 

with the receiving waters. 

il I

PART I

Page 9 of 27

Permit No. SC0004278

B. EFFLUENT TOXICITY LIMITATIONS AND MONITORING REQUIREMENTS

2. During the period beginning on the effective date of this permit and lasting through the expiration

date, the permittee is authorized to discharge from outfall(s) serial number(s) 002: low volume

wastes, miscellaneous dilute wastewater, and metal cleaning wastes to Lake Wylie.

Such discharge shall be limited and monitored by the permittee as specified below:

DISCHARGE

EFFLUENT LIMITATIONS MONITORING REQUIREMENTS

CHARACTERISTICS

Monthly :Daily Measurement Sample

-Average Maximum Frequency Type

Whole Effluent Toxicity

Chronic Testing @ 24 hour composite

CTC=100% . 01 I/quarter

'Report '0" if test passes or *1" if test fails in accordance with Part III.A.13 a, b, c

a. Due to the intermittent and variable duration of the batch discharges for Outfall 002, the sampling protocol

for chronic testing is modified to allow Duke Power Company to conduct the chronic testing with only one

or two samples in instances when flow is not available.

b.Samples taken in compliance with the monitoring requirements specified above shall be taken at the following

location(s): at the point of discharge from the conventional waste treatment (WC) system but prior to mixing

with the receiving waters.
PART I 

Page 10 of 27 

Permit No. SC0004278 

C. GROUNDWATER MONITORING REQUIREMENTS 

1. During the period beginning on the effective date of this permit and lasting through the expiration date, 

each of the four (4) groundwater monitor wells shall be sampled by the 'permittee as specified below: 

PARAMETER LIMITATION MEASUREMENT FREQUENCY 

Water Table Elevation, MSL, tenth/feet MR Semiannually 

Total Dissolved Solids, mg/1 MR . Semiannually 

Total Organic Carbon, mg/I 'MR Semiannually 

pH (field), standard units MR Semiannually 

Specific Conductance (field), umhos/cm - - MR Semiannually 

Ammonia, (NH3) mg/1 MR ' Semiannually 

Nitrate, (NO3), mg/1 MR Semiannually 

Sulfate, mg/I MR Semiannually 

Arsenic, total, mg/I MR Semiannually 

Barium, total, mg/I MR ' Semiannually 

Cadmiuni, total, mg/1 MR Semiannually 

Chromium, total, mg/I MR Semiannually 

Copper, total, mg/1 MR Semiannually 

Iron, total, mg/1 MR Semiannually 

Lead, total, mg/1 . MR Semiannually 

Manganese, total, mg/I MR Semiannually 

Mercury, total, mg/1 MR..: Semiannually 

. , 

Selenium, total, mg/I MR Semiannually : 

Silver, total, mg/l .MR: Semiannually ' 

Zinc, total, mg/1 . MR • . Semiannually 

MR = Monitor and Report 

2. Sample collection methods shall be in accordance with EPA - Standard Operating Procedures, 

Quality Assurance Manual 1991, or the most recent revision. 

3. All groundwater monitoring wells must be properly maintained at all times. 

4. All groundwater monitoring is a SCDHEC requirement. 

PART I

Page 10 of 27

Permit No. SC0004278

C. GROUNDWATER MONITORING REQUIREMENTS

1. During the period beginning on the effective date of this permit and lasting through the expiration date,

each of the four (4) groundwater monitor wells shall be sampled by the permittee as specified below:

PARAMETER LIMITATION: MEASUREMENT FREQUENCY

Water Table Elevation, MSL, tenth/feet

Total Dissolved Solids, mg/I

Total Organic Carbon, mg/l

pH (field), standard units

Specific Conductance (field), umhos/cm

Ammonia, (NH3) mg/I

Nitrate, (NO3), mg/I

Sulfate, mg/I

Arsenic, total, mg/l

Barium, total, mg/l

Cadmium, total, mg/l

Chromium, total, mg/l

Copper, total, mg/I

Iron, total, mg/l

Lead, total, mg/I

Manganese, total, mg/l

Mercury, total, mg/i

Selenium, total, mg/l

Silver, total, mg/l

Zinc, total, mg/l

MR

* MR

MR

MR

*. MR

MR

MR

MR

MR

* MR

MR

MR

MR

MR

MR

. MR.

. MR

MR

.MR.

- MR

Semiannually

Semiannually

Semiannually

.Semiannually

Semiannually

Semiannually

Semiannually

Semiannually

Semiannually

Semiannually

Semiannually

Semiannually

Semiannually

Semiannually

.Semiannually

Semiannually

Semiannually

Semiannually.

Semiannually'

I.. Semiannually

MR = Monitor and Report

2. Sample collection methods shall be in accordance with EPA - Standard Operating Procedures,

Quality Assurance Manual 1991, or the most recent revision.

3. All groundwater monitoring wells must be properly maintained at all times.

4. All groundwater monitoring is a SCDHEC requirement.
PART I 

Page 11 of 27 

Permit No. SC0004278 

D. SCHEDULE OF COMPLIANCE 

1. The permittee shall achieve compliance with the effluent limitations specified for discharges in 

accordance with the following schedules: 

Not Applicable 

2. No later than 14 calendar days following a date identified in the above schedule of compliance, the 

permittee shall submit either a report of progress or, in the case of specific actions being required 

by identified dates; a written notice of compliance or noncompliance. In the latter case, the notice 

shall include the cause of noncompliance, any remedial actions taken, and the 

probability of meeting the next scheduled requirement. 

- I, .

PART I

Page 11 of 27

Permit No. SC0004278

D. SCHEDULE OF COMPLIANCE

1. The permittee shall achieve compliance with the effluent limitations specified for discharges in

accordance with the following schedules:

Not Applicable

2. No later than 14 calendar days following a date identified in the above schedule of compliance, the

permittee shall submit either a report of progress or, in the case of specific actions being required

by identified dates; a written notice of compliance or noncompliance. In the latter case, the notice

shall include the cause of noncompliance, any remedial actions taken, and the

probability of meeting the next scheduled requirement.
PART I 

Page 12 of 27 

Permit No. SC0004278 

E. MONITORING AND REPORTING 

1. Representative Sampling 

Samples and measurements taken as required herein shall be representative of the volume and nature of 

the monitored discharge. . 

2. Flow. Measurements 

• 

Appropriate flow measurement devices and methods consistent with accepted scientific practices shall be 

present and used to ensure the accuracy and reliability of measurements of the volume of monitored 

discharges. The devices shall be installed, calibrated and maintained to ensure that the accuracy of the 

measurements are consistent with the accepted capability of that type of device. Devices selected shall be 

capable of measuring flows with a maximum deviation of less than + 10% from the true discharge rates 

throughout the range of expected discharge volumes. The primary flow device must be accessible to the 

use of a continuous flow recorder. Where a flume is present, a separate stilling well for 

Department/EPA use must be provided if required by the Department. 

3. Reporting Monitoring Results 

- • r 

Monitoring results obtained each month shall be reported monthly on a,Diicharge Monitoring 

Report Form (EPA Form 3320-1). The first report is due postmarked no later than the 28th day of 

the month following the month this permit becomes effective. 

. • 

b. Groundwater Monitoring 

Groundwater monitoring results shall be sUbmitted semiannually on a Groundwater Monitoring • 

Form (DHEC 2110), and postmarked n6 laterihAnthe 28th of the Month following the completed 

reporting period. Each of the semiannually gionndwater monitoring reports aredue on the 28th of 

the months of July, and January. Please reference Site ID,#00534. 

. : • • 

c. Submittal of Reports . • 

, • 

One original and one copy of these, and all other reports required herein, sha-11 be submitted to: 

SC Department of Health and Environmental Control (SCDHEC) 

ATTN: Bureau of WaterAVater'Pollution Enforcement Section 

2600 Bull Street 

Columbia, South Carolina 29201 

A copy, of the Groundwater Monitoring Report shall be submitted to:, 

-SC Department of Health and Environmental Control (SCDHEC) 

ATTN: Bureau of Water/Groundwater Quality SeCtion 

2600 Bull Street 

Columbia, South Carolina 29201 

a. Effluent Monitoring • I 

PART I

Page 12 of 27

Permit No. SC0004278

E. MONITORING AND REPORTING

1. Representative Sampling

Samples and measurements taken as required herein shall be representative of the volume and nature of

the monitored discharge.

2. Flow. Measurements

Appropriate flow measurement devices and methods consistent with accepted scientific practices shall be

present and used to ensure the accuracy and reliability of measurements of the volume of monitored

discharges. The devices shall be installed, calibrated and maintained to ensure that the accuracy of the

measurements are consistent with the accepted capability of that type of device. Devices selected shall be

capable of measuring flows with a maximum deviation of less than + 10% from the true discharge rates

throughout the range of expected discharge volumes. The primary flow device must be accessible to the

use of a continuous flow recorder. Where a flume is present, a separate stilling well for

Department/EPA use must be provided if required by the Department.

3. Reporting Monitoring Results

a. Effluent Monitoring

Monitoring results obtained each month shall be reported monthly on a Discharge Monitoring

Report Form (EPA Form 3320-1). The first report is due postmarked no later than the 28th day of

the month following the month this permit becomes effective.

b. Groundwater Monitoring

Groundwater monitoring results shall be submitted semiannually.on a Groundwater Monitoring

Form (DHEC 2110), and postmarked no later than the 28th of the fiionth foliowing the completed

reporting period. Each of the semiannually groundwater monitoring reports are due on the 28th of

the months of July, and January. Please reference Site ID #00534.

c. Submittal of Reports

,One original and one copy of these, and all other reports required herein, shall be submitted to:

SC Department of Health and Environmental Control (SCDHEC)

ATTN: Bureau of llWater/Water'Pollution Enforcement Section , ,, ', ,

2600 Bull Street

Columbia, South Carolina 29201

A copyof the Groundwater Monitoring Report shall be submitted to:.-

-SC Department of Health and Environmental Control (SCDHEC)

ATTN: Bureau of Water/Groun'dwater Quality Section

2600 Bull Street

Columbia, South Carolina 29201
PART I 

Page 13 of 27 

Permit No. SC0004278 

4. Test Procedures 

Test procedures for the analysis of pollutants shall conform to regulations published pursuant to State 

Environmental Laboratory Certification Regulation 61-81 and Section 304(h) of the Act, as amended. 

(Federal Register, October 16, 1973; Title 40, Chapter I, Sub-chapter D, Part 136 "Guidelines 

Establishing Test Procedures for the Analysis of Pollutants." Amended by Federal Register, December 

1, 1i 976, and any other amendments that may be promulgated). 

5. Recording of Results 

For each measurement or sample taken pursuant to the requirements of this permit, the permittee shall 

record the following information: 

a. the exact place, date and time of sampling; 

b. the dates and times the analyses were performed; 

c. the person(s) who performed the analyses and the laboratory certification number where 

applicable; 

d. the analytical techniques or methods used; and 

e. the results of all required analyses. 

6. Additional Monitoring by Permittee 

If the permittee monitors any pollutant at the lecation(s) designated herein more frequently than required 

by this permit, using approved analytical methods as specified herein, the results of such monitoring 

shall be included in the calculation and reporting of the values required in the Discharge Monitoring 

Report Form (EPA-3320-1). Such increased frequency shall also be indicated. Additional or accelerated 

monitoring may be required to determine the nature and impact of a non-complying discharge on the 

environment or to determine' if a single non-complying sample is representative of the long term 

condition (monthly average). 

7. Records Retention 

All records and information resulting from the monitoring activities required by this permit including all 

records of analysis performed and calibration and maintenance of instrumentation and recordings from 

continuous monitoring instrumentation shall be retained for a minimum of three (3) years, or longer if 

requested by the Department. The permittee shall furnish to the Department, upon request, copies of 

records required to be kept by this permit. 

I

PART I

Page 13 of 27

Permit No. SC0004278

4. Test Procedures

Test procedures for the analysis of pollutants shall conform to regulations published pursuant to State

Environmental Laboratory Certification Regulation 61-81 and Section 304(h) of the Act, as amended.

(Federal Register, October 16, 1973; Title 40, Chapter 1, Sub-chapter D, Part 136 "Guidelines

Establishing Test Procedures for the Analysis of Pollutants." Amended by Federal Register, December

1, t976, and any other amendments that may be promulgated).

5. Recording of Results

For each measurement or sample taken pursuant to the requirements of this permit, the permittee shall

record the following information:

a. the exact place, date and time of sampling;

b. the dates and times the analyses were performed;

c. the person(s) who performed the analyses and the laboratory certification number where

applicable;

d. the analytical techniques or methods used; and

e. the results of all required analyses.

6. Additional Monitoring by Pernittee

If the permittee monitors any pollutant at the lecation(s) designated herein more frequently than required

by this permit, using approved analytical methods as specified herein, the results of such monitoring

shall be included in the calculation and reporting of the values required in the Discharge Monitoring

Report Form (EPA-3320-1). Such increased frequency shall also be indicated. Additional or accelerated

monitoring may be required to determine the nature and impact of a non-complying discharge on the

environment or to determine if a single non-complying sample is representative of the long term

condition (monthly average).

7. Records Retention

All records and information resulting from the monitoring activities required by this permit including all

records of analysis performed and calibration and maintenance of instrumentation and recordings from

continuous monitoring instrumentation shall be retained for a minimum of three (3) years, or longer if

requested by the Department. The permittee shall furnish to the Department, upon request, copies of

records required to be kept by this permit.
PART I 

Page 14 of 27 

Permit No. SC0004278 

8. Definitions 

a. - The "monthly average", other than for fecal .coliform, is the arithmetic mean of all samples 

collected in a calendar month period. The monthly average for _fecal coliform bacteria is the 

geometric mean of all samples collected in a calendar month period. The monthly average loading 

is the arithmetic average of all individual loading determinations made during the month. 

b. The "weekly average", other than for fecal coliform, is the arithmetic mean of all the samples 

:'collected during a one-week period. For self-monitoring purposes, weekly periods in a calendar 

month are defined as three consecutive seven day intervals starting with the first day of the 

calendar month and a fourth interval containing seven days plus those days beyond the 28th day in 

a calendar month. The value to be reported is the single highest of the four weekly averages 

computed during a calendar month. The weekly average loading is.the arithmetic average of all 

individual loading determinations made during the week.. 

c. The "daily maximum" is the highest average value recorded of samples collected on any single day 

of the calendar• month. 

d. The "instantaneous maximum or minimum" is the highest or lowest value recorded of any sample 

-collected during the calendar month. 

• 6 

e. Arithmetic Mean: The arithmetic mean of any set of values is the summation of the individual 

values divided by the number of individual values. , 

f. Geometric Mean: The geometric mean of any set of values is the Nth ,root of the product of the 

individual values where N is equal to the number of individual values. ,The geometric mean is 

equivalent to the antilog of the arithmetic mep ,of the logarithms of the individual values. For 

purposes of calculating the geometric mean, values of zero•(0) shall be considered to be one (1). 

g. Department: The South Carolina Department of. Health and Environmental Control. 

h. Act:" The Clean Water Act (Formerly referred to as the Federal Water ,Pollution Control Act) 

Public Law 92-500, as amended. 

i. Grab Sample: An individual discrete or single influent or effluent portion of at least 100 milliliters 

collected at a time representative of the discharge and over a period not exceeding 15 minutes and 

retained separately for analysis. Instantaneous flow measured at the time of grab sample collection 

. shall be used to calculate quantity. 

Composite Sample: One of the following four types of composite samples as defined is specified 

within this permit: 

PART I

Page 14 of 27

Permit No. SC0004278

8. Definitions

a. - The "monthly'average", other than for fecal coliform, is the arithmetic mean of all samples

collected in a calendar month period.- The monthly average for fecal coliform bacteria is the

geometric mean of all samples collected in a calendar month period, The monthly average loading

is the arithmetic average of all individual loading determinations made during the month.

b. The "weekly average',, other than for fecal coliform, is the arithmetic mean of all the samples

. :collected during a one-week period. For self-monitoring purposes, weekly periods in a calendar

month are defined as three consecutive seven day intervals starting with the first day of the

calendar month and a fourth interval containing seven days plus those days beyond the 28th day in

a calendar month. The value to be reported is the single highest of the four weekly averages

computed during a calendar month. The weekly average loading is the arithmetic average of all

individual loading determinations made during the week.;

c. The "daily maximum" is the highest average value recorded of samples collected on any single day

of the calendar month.

d. The "instantaneous maximum or minimum" is the highest or lowest value recorded of any sample

collected during the calendar month.

e. Arithmetic Mean: The arithmetic mean of any set of values is the summation of the individual

values divided by the number of individual values.

f. Geometric Mean: The geometric mean of any -set of values is the Nth -root of the product of the

individual values where N is equal to the number of individual values. The geometric mean is

equivalent to the antilog of the arithmetic mean of the logarithms of the individual values. For

' purposes of calculating the geometric mean, values of zero.(0) shall be considered to be one (1).

g. Department: The South Carolina Department of Health and Environmental Control.

h. Act:' The'Clean Water Act (Formerly referred to as the Federal Water Pollution Control Act)

Public'Law 92-500, as amended.

i. Grab Sample: An individual discrete or single influent or effluent portion of at least 100 milliliters

collected at a time representative of the discharge and over a period not exceeding 15 minutes and

retained separately for analysis. Instantaneous flow measured at the time of grab sample collection

shall be used to calculate quantity.

j. Composite Sample: One of the following four types of composite samples as defined is specified

within this permit:
PART I 

Page 15 of 27 

Permit No. SC0004278 

(1) An influent or effluent portion collected continuously over a specified period of time at a 

rate proportional to the flow. 

(2) A combination of not less than eight (8) influent or effluent grab samples collected at 

regular (equal) intervals over a specified period of time, properly preserved, (See Part 

I.D.4.) and composited by increasing the volume of each aliquot in proportion to flow. If 

continuous flow measurement is not used to composite in proportion to flow, the following 

method will be used: Take an instantaneous flow measurement each time a grab sample is 

collected. At the end of the sampling period, sum the instantaneous flow measurements to 

obtain a total flow to determine the partial amount (percentage) of each grab sample to be 

combined to obtain the composite sample. 

(3) A combination of not less than eight (8) influent or effluent grab samples of equal volume 

but at variable time intervals that are inversely proportional to the volume of the flow. 

That is, the time interval between aliquots is reduced as the volume of flow increases. 

(4) A combination of not less than eight (8) influent or effluent grab samples of constant 

(equal) volume collected at regular (equal) time intervals over a specified period of time, 

while being properly preserved. 

Continuous flow or the sum of instantaneous flows measured and averaged for the specified 

compositing time period shall be used with composite sample results to calculate quantity. 

9. Right of Entry 

The permittee shall allow the Commissioner of the Department of Health and Environmental Control, the 

Regional Administrator of EPA, and/or their authorized representatives: 

a. To enter upon the permittee's premises where a regulated facility or activity and effluent source is 

located in which any records are required to be kept under the terms and conditions of this permit, 

and, 

b. At reasonable times to have access to and copy any records required to be kept under the terms 

and conditions of this permit; to inspect any facilities, equipment (including monitoring and 

control equipment), practices or operations regulated or required under this permit and sample or 

monitor any substances or parameters at any location for the purposes of assuring permit 

compliance. 

I1 I

PART I

Page 15 of 27

Permit No. SC0004278

(1) An influent or effluent portion collected continuously over a specified period of time at a

rate proportional to the flow.

(2) A combination of not less than eight (8) influent or effluent grab samples collected at

regular (equal) intervals over a specified period of time, properly preserved, (See Part

I.D.4.) and composited by increasing the volume of each aliquot in proportion to flow. If

continuous flow measurement is not used to composite in proportion to flow, the following

method will be used: Take an instantaneous flow measurement each time a grab sample is

collected. At the end of the sampling period, sum the instantaneous flow measurements to

obtain a total flow to determine the partial amount (percentage) of each grab sample to be

combined to obtain the composite sample.

(3) A combination of not less than eight (8) influent or effluent grab samples of equal volume

but at variable time intervals that are inversely proportional to the volume of the flow.

That is, the time interval between aliquots is reduced as the volume of flow increases.

(4) A combination of not less than eight (8) influent or effluent grab samples of constant

(equal) volume collected at regular (equal) time intervals over a specified period of time,

while being properly preserved.

Continuous flow or the sum of instantaneous flows measured and averaged for the specified

compositing time period shall be used with composite sample results to calculate quantity.

9. Right of Entry

The permittee shall allow the Commissioner of the Department of Health and Environmental Control, the

Regional Administrator of EPA, and/or their authorized representatives:

a. To enter upon the permittee's premises where a regulated facility or activity and effluent source is

located in which any records are required to be kept under the terms and conditions of this permit,

and,

b. At reasonable times to have access to and copy any records required to be kept under the terms

and conditions of this permit; to inspect any facilities, equipment (including monitoring and

control equipment), practices or operations regulated or required under this permit and sample or

monitor any substances or parameters at any location for the purposes of assuring permit

compliance.
PART I 

Page 16 of 27 

Permit No. SC0004278 

A. GENERAL REQUIREMENTS 

1. Duty to Comply 

The permittee must comply with all conditions of this perMit. Any perinit non-compliance constitutes a 

violation of the Act and the S.C. Pollution Control Act and is grounds for enforceMent action, for permit 

termination, revocation • and reissiianCe, 'or modification; or fOr the denial 'Of ac perMit renewal 

application. 

2. Ciyjl and Criminal Liability 

. • . 

a. Any person who violates a term, condition or seliedule of compliance contained within this permit 

"is subject to the actions defined by Sections 48=1-'320 'arid 48-1-330 of the SC Pollution Control 

Act. 

b. Except as providedin permit conditions on "BypasSing" (Part II.C.2.), nothing in thiS i)ermit shall 

.be construed to relieve the permittee from civil or criminal penalties for non-compliance. 

c. It shall not be an acceptable defense of the perinittee in:an'enforcement action that it would have 

been necessary to halt Or 'reduce the permitted activity in Order to maintain cOMpliance with the 

conditions of this perMit. 

d. It is the responsibility of the permittee to have a treatment facility that will meet the final effluent 

'limitations of this permit. The approval of planS and specifications by the Department does not 

relieve the permittee of responsibility tor compliance. • 

3. Oil and Hazardous Substance Liability 

Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the 

permittee from any resPonsibilities, liabilities, Or penalties to which the perinitted is or may be subject to 

under Section 311 of the Act, the S.C.• Polltition Control Act Or applicable proVisions of the S.C. 

Hazardous Waste ManageMent Act and the S.C. Oil and •Gas Act. • • 

.•• , . 

4. Permit Modification 

a. The permittee shall furnish to The Department within a reasonable time any relevant information 

which the Department may request to determine whether cause exists for modifying, revoking and 

reissuing, or terminating the permit, or to determine compliance with the permit. 

b. Upon sufficient cause, this permit may be modified, revoked, reissued, 'or terminated during its 

term, after public notice and opportunity for a hearing. Modifications deemed to be minor will not 

require public notice. 

c. The filing of a request by the permittee for a permit modification, or a notification of planned 

changes or anticipated non-compliance, does not stay any permit condition. 

PART I

Page 16 of 27

Permit No. SC0004278

A. GENERAL REQUIREMENTS

1. Duty to Comply

The permittee must comply with all condition's of this permit. Any permit noii-compliance constitutes a

violation of the Act and the S.C. Pollution Control Act and is grounds for enforcement action; for permit

termination, revocation and reissuance, or 'modification; or for the denial 'of a' permit renewal

application.

2. Civyl and Criminal Liability

a. 'Any person who violates a term, condition or scliedule of compliaince contained within this permit

A'is subject to the actions defined by Sections 48-1-320 and 48-1-330 of the SC Pollution Control

Act.

b. Except as provided in permit conditions on "Bypassing" (Part Il.C.2.), nothinig in this permit shall

be construed to relieve the permittee from civil or criminal penalties for non-compliance.

c. It shall not be an acceptable defense of the permittee in an enforcement action that it w'ould have

been necessary to halt or reduce the permitted activity in order to maintain co'mpliance with the

conditions of this permit.

d. It is the responsibility of the permittee to have a treatment facility that will meet the final effluent

'limitations of this permit. The 'approval of plans and specifications by the Department does not

relieve the permittee of responsibility for compliance.

3. Oil and Hazardous Substance Liability

Nothing in this permit shall be construed to preclude the institution of any le"gal action or relieve the

permittee from any respon'sibilities, liabilities,C6r penalties to which the pefmittee is or may be subject to

under Section 311 of the Act, 'the S.C. Pollution Control Act'or applicable provisions of the S.C.

Hazardous Waste Management Act and the'S.C. Oil and 'Gas Act.

4. Permit Modification

a. The permittee shall furnish-to the Department within a reasonable time any relevant information

which the Department may request to determine whether cause exists for modifying, revoking and

reissuing, or terminating the permit, or to determine compliance with the permit.

b. Upon sufficient cause, this permit may be modified, revoked, reissued,'or terminated during its

term, after public notice and opportunity for a hearing. Modifications deemed to be minor will not

require public notice.

c. 'The filing of a request by the permittee for a permit modification, or a notification of planned

changes or anticipated non-compliance, does not stay any permit condition.
PART I 

Page 17 of 27 

Permit No. SC0004278 

5. Toxic Pollutants 

Notwithstanding Part ILA .4. above, if a toxic effluent standard or prohibition (including any schedule of 

compliance specified in such effluent standard or prohibition) is established under Section 307(a) of the 

Act for a toxic pollutant which is present in the discharge and such standard or prohibition is more 

stringent than any limitations for such pollutant in this permit, this permit shall be revised or modified in 

accordance with the toxic effluent standard or prohibition and permittee so notified. 

6. State Laws 

• 

Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the 

permittee from any responsibilities, liabilities, or penalties established pursuant to any applicable State 

law' or regulation under authority preserved by Section 510 of the Act. 

7. Property Rights 

The issuance of this permit does not convey any property rights in either real or personal property, or 

any exclusive privileges, nor does it authorize any injury to private property or any invasion of personal 

rights, nor any infringement of Federal, State, or local laws or regulations. 

8. Severability 

The provisions of this permit are severable, and if any provisions of this permit, or the application of any 

provision of this permit to any circumstances, is held invalid, the application of such provision to other 

circumstances, and the remainder of this permit shall not be affected thereby. 

9. Onshore and Offshore Construction 

This permit does not authorize or approve the construction of any onshore or offshore physical structures 

or facilities or the undertaking of any work in any navigable waters. 

_ _ _ _ - IL~ I - ILPART I

Page 17 of 27

Permit No. SC0004278

5. Toxic Pollutants

Notwithstanding Part II.A.4. above, if a toxic effluent standard or prohibition (including any schedule of

compliance specified in such effluent standard or prohibition) is established under Section 307(a) of the

Act for a toxic pollutant which is present in the discharge and such standard or prohibition is more

stringent than any limitations for such pollutant in this permit, this permit shall be revised or modified in

accordance with the toxic effluent standard or prohibition and permittee so notified.

6. State Laws

Nothing in this permit shall be construed to preclude the institution of any legal action or relieve the

permittee from any responsibilities, liabilities, or penalties established pursuant to any applicable State

law'or regulation under authority preserved by Section 510 of the Act.

7. Property Rights

The issuance of this permit does not convey arny property rights in either real or personal property, or

any exclusive privileges, nor does it authorize any injury to private property or any invasion of personal

rights, nor any infringement of Federal, State, or local laws or regulations.

8. Severability

The provisions of this permit are severable, and if any provisions of this permit, or the application of any

provision of this permit to any circumstances, is held invalid, the application of such provision to other

circumstances, and the remainder of this permit shall not be affected thereby.

9. Onshore and Offshore Construction

This permit does not authorize or approve the construction of any onshore or offshore physical structures

or facilities or the undertaking of any work in any navigable waters.
PART II 

Page 18 of 27 

Permit No. SC0004278 

B. REPORTING REQUIREMENTS 

1. Change in Discharge 

All discharges authorized herein shall be consistent with the terms and conditions of this permit. The 

discharge of any pollutant identified in this permit more frequently than or at a level in excess of that 

authorized shall constitute a violation of the permit. Any planned facility expansions, production 

increases, or process modifications which will result in a new or different discharge of pollutants must be 

reported by submission of a new NPDES application or, if such changes will not violate the effluent 

limitations specified in this permit, by notice to the Department of such changes. Following such notice, 

the permit may be modified to specify and limit any pollutant not previously limited. 

2. Twenty-Four Hour Non-Compliance Reporting 

a. The permittee shall report any non-compliance with provisions specified in this permit which may 

endanger public health or the environment. The permittee shall notify the Department orally 

within 24 hours of becoming aware of such conditions. During normal working hours call 

803/898-4300. After hour reporting should be. made to the 24 hour Emergency Response 

telephone number 803/253-6488. The permittee shall provide the following information to the 

Department in writing, within five (5) days' of becoming *aware of such conditions: 

1. A description of the discharge and cause of non-compliance; and, 

2. The period of non-compliance, including exact dates and times; or, if not corrected, the 

anticipated time the non-compliance is expected to continue, and steps being taken to 

reduce, eliminate and prevent recurrence of the non-complying discharge. 

b. The following violations shall be included in a 24 hour report when they might endanger health or 

the environment: 

1 An unanticipated bypass which exceeds any .effluent limitation in this permit; 

2. Any upset which exceeds any effluent limitation in the permit. 

c. As soon as the permittee has knowledge of or anticipates the need for a bypass, but not later than 

10 days before the date of the bypass, it shall notify the Department and provide a determination of 

the need for bypass as well as the anticipated quality, quantity, time of duration, and effect of the 

bypass. 

3. Other Non-Compliance 

The permittee shall report in narrative form, all instances of non-compliance not previously reported 

under Section B, Paragraph B.2., at the time Discharge Monitoring Reports are submitted. The reports 

shall contain the information listed in Paragraph B.2 .a. . 

PART II

< > Page 18 of 27

Permit No. SC0004278

B. REPORTING REQUIREMENTS

1. Change in Discharge

All discharges authorized herein shall be consistent with the terms and conditions of this permit. The

discharge of any pollutant identified in this permit more frequently than or at a level in excess of that

authorized shall constitute a violation of the permit. Any planned facility expansions, production

increases, or process modifications which will result in a new or different discharge of pollutants must be

reported by submission of a new NPDES application or, if such changes will not violate the effluent

limitations specified in this permit, by notice to the Department of such changes. Following'such notice,

the permit may be modified to specify and limit any pollutant not previously limited.

2. Twenty-Four Hour Non-Compliance Reporting ;

a. The permittee shall report any non-compliance with provisions specified in this permit which may

endanger public health or the environment. The permittee shall notify the Department orally

within 24 hours of becoming aware of such conditions. During normal working hours call

803/8984300. After hour reporting should be. made to the 24 hour Emergency Response

-.:telephone number.803/253-6488. The permittee shall provide the following information to the

Department in writing, within five (5) days of becoming aware of such conditions:

1. A description of the discharge and cause of non-compliance; and,

2. The period of non-compliance, including exact dates and times; or, if not corrected, the

anticipated time the non-compliance is expected -to continue, and steps being taken to

reduce, eliminate and prevent recurrence of the non-complying discharge.

b. The following violations shall be included in a 24 hour report when they might endanger health or

the environment:

1. An unanticipated bypass which exceeds any.effluent limitation in this permit;

2. Any upset which exceeds any effluent limitation in the permit.

c. As soon as the permittee has knowledge of or anticipates the need for a bypass, but not later than

10 days before the date of the bypass, it shall notify the Department and provide a determination of

the need for bypass as well as the anticipated quality, quantity, time of duration, and effect of the

bypass.

3. Other Non-Compliance

The permittee shall report in narrative form, all instances of non-compliance not previously reported

under Section B, Paragraph B.2., at the time Discharge Monitoring Reports are submitted. The reports

shall~contain the information listed in Paragraph B.2.a.- I I
PART II 

Page 19 of 27 

Permit No. SC0004278 

4. Transfer of Ownership or Control 

A permit may be transferred to another party under the following conditions: 

a. The permittee notifies the Department of the proposed transfer at least thirty (30) days in advance 

of the proposed transfer date; 

b. A written agreement is submitted to the Department between the existing and new permittee 

containing a specific date for the transfer of permit responsibility, coverage, and liability for 

violations up to that date and thereafter. 

Transfers are not effective if, within thirty (30) days of receipt of proposal, the Department disagrees and 

notifies the current permittee and the new permittee of the intent to modify, revoke and reissue, or 

terminate the permit and to require that a new application be filed. 

5. Expiration of Permit 

The permittee is not authorized to discharge after the expiration date of this permit, unless a completed 

application for reissuance is submitted no later than 180 days prior to the expiration date. Permission 

may be granted to submit an application later than this, but not later than the expiration date of the 

permit. In accordance with Section 1-23-370 of the code of laws of South Carolina, if a timely and 

sufficient application is made for any activity of a continuing nature, the existing permit does not expire 

until a final determination is made to renew or deny renewal of the existing permit. 

6. Signatory Requirements 

All applications, reports or information submitted to the Department shall be signed and certified. 

a. All permit applications shall be signed as follows: 

1. For a corporation: by a principal executive officer of at least the level of vice-president or 

by a duly authorized representative; 

2. For a partnership or sole proprietorship: by a general partner or proprietor, respectively; 

or, 

3. For a municipality, State, Federal or other public agency: by either a principal executive 

officer or ranking elected official. 

b. All reports required by the permit and other information requested by the Department shall be 

signed by a person described above or by duly authorized representative only if: 

1. The authorization is made in writing by a person described above and submitted to the 

Department; 

-. tL I ~n

PART II

Page 19 of 27

Permit No. SC0004278

4. Transfer of Ownership or Control

A permit may be transferred to another party under the following conditions:

a. The permittee notifies the Department of the proposed transfer at least thirty (30) days in advance

of the proposed transfer date;

b. A written agreement is submitted to the Department between the existing and new permittee

containing a specific date for the transfer of permit responsibility, coverage, and liability for

violations up to that date and thereafter.

Transfers are not effective if, within thirty (30) days of receipt of proposal, the Department disagrees and

notifies the current permittee and the new permittee of the intent to modify, revoke and reissue, or

terminate the permit and to require that a new application be filed.

5. Expiration of Permit

The permittee is not authorized to discharge after the expiration date of this permit, unless a completed

application for reissuance is submitted no later than 180 days prior to the expiration date. Permission

may be granted to submit an application later than this, but not later than the expiration date of the

permit. In accordance with Section 1-23-370 of the code of laws of South Carolina, if a timely and

sufficient application is made for any activity of a continuing nature, the existing permit does not expire

until a final determination is made to renew or deny renewal of the existing permit.

6. Signatory Requirements

All applications, reports or information submitted to the Department shall be signed and certified.

a. All permit applications shall be signed as follows:

1. For a corporation: by a principal executive officer of at least the level of vice-president or

by a duly authorized representative;

2. For a partnership or sole proprietorship: by a general partner or proprietor, respectively;

or,

3. For a municipality, State, Federal or other public agency: by either a principal executive

officer or ranking elected official.

b. All reports required by the permit and other information requested by the Department shall be

signed by a person described above or by duly authorized representative only if:

1. The authorization is made in writing by a person described above and submitted to the

Department;
PART II 

Page 20 of 27 

Permit No. SC0004278 

2. The authorization specifies either an individual or a position having responsibility for the 

overall operation of the regulated facility or activity, such as the position of plant manager, 

superintendent, or position of equivalent responsibility. (A duly authorized representative 

may thus be either a named individual or any individual occupying a named position.) 

7. Availability of Reports 

Except for data determined to be confidential under Section 48-1-270 of the S.C. Pollution Control Act, 

all reports prepared in accordance with the terms and conditions of this permit shall be available for 

public inspection at the offices of the Department and The-Regional Administrator. , As required by the 

Act;' effluent data shall not be considered confidential.. Knowingly making any false statement on any 

such report may result in the imposition of criminal penalties as piovided for in Section 48-1-340 of the. 

Pollution Control Act. 

••: • 

8. Changes in Discharges of Toxic Pollutants 'or Hazardous Substances 

a. The permittee shall notify the Department as soon as it knows or has reason to believe that any 

activity has occurred or will occur which would result in the discharge in any outfall of: 

-1. Any toxic pollutant(s) identified Under Section 307(a) of the Act which exceed the highest 

of the following concentrations and are not limited in the peirnit. 

1 mg/1 for antimony (Sb): 

0.500 mg/1 for 2,4-dinitrophenol or 2-methyl-4,6-dinitrophenol; 

0.200 mg/1 for acrolein or acrylonitrile; 

0.100 mg/1 for,any other toxic pollutant; or, 

Ten (10) times the maximum concentration value reported 

application. 

in the permit 

2. Any hazardous substance(s) identified under Section 311 of the Act as determined by 

Federal Regulation 40 CFR 117. 

b. The permittee must notify the Department as soon as it knows or has reason to believe that it has 

begun or expects to begin to use or manufacture as an intermediate or final product or by-product 

any toxic pollutant or hazardous substance which was not reported in the permit application. 

PART II

Page 20 of 27

Permit No. SC0004278

2. The authorization specifies either an individual or a position having responsibility for the

overall operation of the regulated facility or activity, such as the position of plant manager,

superintendent, or position of equivalent responsibility. (A duly authorized representative

may thus be either a named individual or any individual occupying a named position.)

7. Availability of Reports

Except for data determined to be confidential under Section 48-1-270 of the S.C. Pollution Control Act,

all reports prepared in accordance with the terms and conditions of this permit shall be available for

public inspection at the offices of the Department and the -Regional Administrator. .As required by the

Act effluent data shall not be considered confidential. Knowingly making any false statement on any

such report may result in the imposition of criminal penalties as provided for in Section 48-1-340 of thee

S.C, Pollution Control Act.

8. Changes in Discharges of Toxic Pollutants'or Hazardous Substances

a. The permittee shall notify the Department as soon as it knows or has reason to believe that any

activity has occurred or will occur which would result in the discharge in any outfall of:

*1. Any toxic pollutant(s) identified under Section 307(a) of the Act which exceed the highest

of the following concentrations and are not limited in the permit.

1 mg/I for antimony (Sb):

- 0.500 mg/l for 2,4-dinitrophenol or 2-methyl-4,6-dinitrophenol;

0.200 mg/i for acrolein or acrylonitrile;

- 0.100 mg/i for any other toxic pollutant; or,

- Ten (10) times the maximum concentration value reported in the permit

application.. ' ' -

2. Any hazardous substance(s) identified under Section 311 of the Act as determined by

Federal Regulation 40 CFR 117.

b. The permittee must notify the Department as soon as it knows or has reason to believe that it has

begun or expects to begin to use or-manufacture as an intermediate or final product or by-product

any toxic pollutant or hazardous substance which was not reported in the permit application.

..
PART II 

Page 21 of 27 

Permit No. SC0004278 

C. OPERATION AND MAINTENANCE 

1. Facilities Operation 

a. The permittee shall at all times properly operate and maintain all facilities and systems of treatment 

and control (and related appurtenances) which are installed or used by the permittee to achieve 

compliance with the conditions of this permit. Proper operation and maintenance includes 

effective performance based on design facility removals, adequate funding, adequate operator 

staffing and training, and adequate laboratory and process controls as determined by the laboratory 

.. certification program of the Department. This provision requires the operation of back-up or 

auxiliary facilities or similar systems only when necessary to achieve compliance with the 

conditions of the permit. Maintenance of facilities, which necessitates unavoidable interruption of 

operation and degradation of effluent quality shall be scheduled during non-critical water quality 

periods and carried out in a manner approved by the Department. 

b. The permittee shall provide for an operator, as certified by the South Carolina Board of 

Certification for Environmental Systems Operators, with a grade equal to or higher than the 

classification designated in Part III.A.3. The name and grade of the operator of record shall be 

submitted to the Department prior to placing the facility into operation. A roster of operators 

associated with the facility's operation and their certification grades shall also be submitted with 

the name of the "operator-in-charge". Any changes in operator or operators shall be submitted to 

the Department as they occur. 

2. Bypassing 

Any intentional diversion from or bypass of waste streams from any portion of wastewater collection and 

treatment facilities which is not a designed or established operating mode for the facility is prohibited 

except (a) where unavoidable to prevent loss of life, personal injury or severe property damage, or (b) 

where excessive storm drainage or run-off would damage any facilities necessary for compliance with the 

effluent limitations and prohibitions of this permit and there were no feasible alternatives to the bypass, 

such as the use of auxiliary treatment facilities or retention of untreated wastes. "Severe property 

damage" does not mean economic loss caused by delays in production. 

3. Duty to Mitigate, Halt or Reduce Activity 

The permittee shall take all reasonable steps to prevent, minimize or correct any adverse impact on 

public health or the environment, resulting from non-compliance with this permit. Upon reduction, loss, 

or failure of the treatment facility, the permittee shall, to the extent necessary to maintain compliance 

with this permit, control production or all discharges or both until the facility is restored or an alternative 

method of treatment is provided. 

-- _______________________ T __________________ - I _ U __LL_

PART II

Page 21 of 27

Permit No. SC0004278

C. OPERATION AND MAINTENANCE

1. Facilities Operation

a. The permittee shall at all times properly operate and maintain all facilities and systems of treatment

and control (and related appurtenances) which are installed or used by the permittee to achieve

compliance with the conditions of this permit. Proper operation and maintenance includes

effective performance based on design facility removals, adequate funding, adequate operator

staffing and training, and adequate laboratory and process controls as determined by the laboratory

certification program of the Department. This provision requires the operation of back-up or

auxiliary facilities or similar systems only when necessary to achieve compliance with the

conditions of the permit. Maintenance of facilities, which necessitates unavoidable interruption of

operation and degradation of effluent quality shall be scheduled during non-critical water quality

periods and carried out in a manner approved by the Department.

b. The permittee shall provide for an operator, as certified by the South Carolina Board of

Certification for Environmental Systems Operators, with a grade equal to or higher than the

classification designated in Part III.A.3. The name and grade of the operator of record shall be

submitted to the Department prior to placing the facility into operation. A roster of operators

associated with the facility's operation and their certification grades shall also be submitted with

the name of the "operator-in-charge". Any changes in operator or operators shall be submitted to

the Department as they occur.

2. Bypassing

Any intentional diversion from or bypass of waste streams from any portion of wastewater collection and

treatment facilities which is not a designed or established operating mode for the facility is prohibited

except (a) where unavoidable to prevent loss of life, personal injury or severe property damage, or (b)

where excessive storm drainage or run-off would damage any facilities necessary for compliance with the

effluent limitations and prohibitions of this permit and there were no feasible alternatives to the bypass,

such as the use of auxiliary treatment facilities or retention of untreated wastes. "Severe property

damage" does not mean economic loss caused by delays in production.

3. Duty to Mitigate, Halt or Reduce Activity

The permittee shall take all reasonable steps to prevent, minimize or correct any adverse impact on

public health or the environment, resulting from non-compliance with this permit. Upon reduction, loss,

or failure of the treatment facility, the permittee shall, to the extent necessary to maintain compliance

with this permit, control production or all discharges or both until the facility is restored or an alternative

method of treatment is provided.
PART II 

Page 22 of 27 

Permit No. SC0004278 

4. Power Failures 

In order to maintain compliance with effluent limitations and prohibitions of this permit, the permittee 

shall either: 

a. In accordance with the Schedule of Compliance contained in Part I.D., provide an: alternative 

power source sufficient to operate the wastewater control facilities; 

or, if such alternative power source is not in existenee, and no date for its implementation appears 

in Part I.D., have a plan of operation which will: 

b. Halt, reduce, or otherwise control prOdtiction and/or all discharges upon the reduction, loss, or 

failure of the primary source of power to the wastewater control facilities., 

• 

5. Removed Substances 

Solids, sludges; filter backwash or other residuals, removed in the course, of treatment or control of 

wastewaters shall be disposed of in a manner.such as to preveni suchinaterials from entering State waters 

and in accordance with guidelines issued pursuant to Section 405 of the ACt,. and the, terms of a 

construction or NPDES and/Or 'solid or hazardous wake peimit issued by the Departinent: 

.,• 

PART II

Page 22 of 27

Permit No. SC0004278

4. Power Failures

In order to maintain compliance with effluent limitations and prohibitions of this permit, the permittee

shall either:

a. In accordance with the Schedule of Compliance contained in Part I.D., provide an:alternative

power source sufficient to operate the wastewater control facilities;

or, if such' alternative power source is not in existence, and no date for its implementation appears

in Part I.D., have a plan of operation which will:

b. Halt, reduce, or otherwise control production and/or all discharges upon the reduction, loss, or

failure of the primary source of power to the wastewater control facilities.

5. Removed Substances

Solids, sludges, filter backwash or other residuals removed in the course of treatment or control of

wastewaters shall be disposed of in a manner. such as t6 prevent such'materials from entering State waters

and in accordance with guidelines issued 'pursuant to Secti6n 405 of the 'Act, and the 'terms of a

construction or NPDES and/or solid or hazardous waste permit issued by the Department.

4 . .. . ,

.. . ..

*: st 'n . ES : / it isu' v ,;_ . art:,?,m,-ent 

: ' -. . . , : .l ,..7

., ..
PART III 

Page 23 of 27 

Permit NO. SC0004278 

PART III 

A. OTHER REQUIREMENTS 

1. The Permittee shall maintain at the permitted facility a complete Operations and Maintenance (0 & M) 

Manual for the waste treatment plant. The manual shall be made available for on-site review during 

normal working hours. The manual shall contain operation and maintenance instructions for all 

equipment and appurtenances associated with the waste treatment plant. The manual shall contain a 

general description of the treatment process(es), operating characteristics that will produce maximum 

treatment efficiency, and corrective action to be taken should operating difficulties be encountered. 

2. The ,Permittee shall provide for the performance of routine daily treatment plant inspections. These 

inspections are the responsibility of a certified operator of the appropriate grade as defined in Part 

II.C.1. The inspection shall include, but is not limited to, areas which require a visual observation to 

determine efficient operations and for which immediate corrective measures can be taken using the 0 & 

M manual as a guide. All inspections shall be recorded and shall include the date, time and name of the 

person making the inspection, corrective measures taken, and routine equipment maintenance, repair, or 

replacement performed. The Permittee shall maintain all records of inspections at the permitted facility 

as required by Part I.D.7., and the records shall be made available for on-site review during normal 

working hours. 

3. The wastewater treatment plant has been assigned a classification of Group II-B in the Permits to 

Construct which are issued by the Department. This classification corresponds to an operator with a 

Grade of C-B or higher. 

4. The Permittee shall maintain an all weather access road to the wastewater treatment plant and 

appurtenances at all times. 

5. The Permittee shall continue to maintain a Best Management Practices (BMP) plan to identify and control 

the discharge of significant amounts of oils and the hazardous and toxic substances listed in 40 CFR Part 

117 and Tables II and III of Appendix D to 40 CFR Part 122. The plan shall include a listing of all 

potential sources of spills or leaks of these materials, a method for containment, a description of training, 

inspection and security procedures, and emergency response measures to be taken in the event of a 

discharge to surface waters or plans and/or procedures which constitute an equivalent BMP. Sources of 

such discharges may include materials storage areas; in-plant transfer, process and material handling 

areas; loading and unloading operations; plant site runoff; and sludge and waste disposal areas. The 

BMP plan shall be developed in accordance with good engineering practices, shall be documented in 

narrative form, and shall include any necessary plot plans, drawings, or maps. The BMP plan shall be 

maintained at the plant site and shall be available for inspection by EPA and Department personnel. 

6. There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for 

transformer fluid. 

11 ._ L U_

PART III

Page 23 of 27

Permit No. SC0004278

PART III

A. OTHER REQUIREMENTS

1. The Permittee shall maintain at the permitted facility a complete Operations and Maintenance (O & M)

Manual for the waste treatment plant. The manual shall be made available for on-site review during

normal working hours. The manual shall contain operation and maintenance instructions for all

equipment and appurtenances associated with the waste treatment plant. The manual shall contain a

general description of the treatment process(es), operating characteristics that will produce maximum

treatment efficiency, and corrective action to be taken should operating difficulties be encountered.

2. The Permittee shall provide for the perfcrnmance of routine daily treatment plant inspections. These

inspections are the responsibility of a certified operator of the appropriate grade as defined in Part

II.C. 1. The inspection shall include, but is not limited to, areas which require a visual observation to

determine efficient operations and for which immediate corrective measures can be taken using the 0 &

M manual as a guide. All inspections shall be recorded and shall include the date, time and name of the

person making the inspection, corrective measures taken, and routine equipment maintenance, repair, or

replacement performed. The Permittee shall maintain all records of inspections at the permitted facility

as required by Part I.D.7., and the records shall be made available for on-site review during normal

working hours.

3. The wastewater treatment plant has been assigned a classification of Group 1I-B in the Permits to

Construct which are issued by the Department. This classification corresponds to an operator with a

Grade of C-B or higher.

4. The Permittee shall maintain an all weather access road to the wastewater treatment plant and

appurtenances at all times.

5. The Permittee shall continue to maintain a Best Management Practices (BMP) plan to identify and control

the discharge of significant amounts of oils and the hazardous and toxic substances listed in 40 CFR Part

117 and Tables II and III of Appendix D to 40 CFR Part 122. The plan shall include a listing of all

potential sources of spills or leaks of these materials, a method for containment, a description of training,

inspection and security procedures, and emergency response measures to be taken in the event of a

discharge to surface waters or plans and/or procedures which constitute an equivalent BMP. Sources of

such discharges may include materials storage areas; in-plant transfer, process and material handling

areas; loading and unloading operations; plant site runoff; and sludge and waste disposal areas. The

BMP plan shall be developed in accordance with good engineering practices, shall be documented in

narrative form, and shall include any necessary plot plans, drawings, or maps. The BMP plan shall be

maintained at the plant site and shall be available for inspection by EPA and Department personnel.

6. There shall be no discharge of polychlorinated biphenyl compounds such as those commonly used for

transformer fluid.
PART III 

Page 24 of 27 

- Permit No. SC0004278 

7. The permittee shall monitor all parameters 'consistent with conditions established by this permit 

on the 1st Tuesday of every calendar month; unless' otherwise apprOved,by this Department. 

Should the 1st Tuesday fall on a holiday, monitoring may be conducted on the-following work 

day. Additional monitoring, as necessary to meet the frequency requiremen6 of this permit (Part 

I.A. Effluent Limitations and Monitoring Requirements) shall. bePerformed by' the permittee. 

Toxicity monitoring shall be conducted at the frequencyitnted in Part I.B.-Effluent Toxicity 

Limitations and Monitoring Requirements. The permittee shall 'notify the Department two (2) 

weeks prior to any changes in the monitoringlschedule: , 

8. Unless authorized elsewhere in this permit, the permittee shall meet theiollowing requirements 

concerning .maintenance chemicals for the following waste streams: once-through non-contact 

cooling water, and cooling tower blowdown. Maintenance chemicals shall be defined as any 

man-induced additiVes to the above-referenced waste streams. This includes materials added for 

COITosiOn inhibition including zinc, chromium, and phosphorus. 

a. The discharge, in detectableamounts, of any of the one hundred and twenty-six priority 

pollutants is prohibited, if the 'pollutants' are present due to: the use of maintenance 

chemicals. 

b. Slimicideg, algicides and biOCide shall be used in ,eccordance—with registration 

requirements of the Federal Insecticide, Fungicide and Rodenticide 

The use of maintenance chemicals' containing 'bis(tributyltin) oxide is prohibited "unless 

written- Up-pi-oval is obtained from SCDHEC. 

d. Any maintenance chemicals added to the above referenced -waste streams must degrade 

, 

rapidly; either due to hydrolytic decorriPosition'or biodegradation. 

e. The digcharge of maintenance cherniCals, added to waste streams must be limited to 

concentrations which protect, indigenous aquatic populations in the receiving stream and 

shall not exceed the "no observed effect level (NOEL)" 

The perniittee shall keep sufficient documentation • on-site .which itipport that the above 

requirements are being met. The inforMation shall :be made available for on-site review by 

Department personnel during normal working hours. .The occurrence of in-stream problems may 

necessitate the subniiital of chemical additive data and May require a permit modification to 

include additional monitoring and limitations; The permittee may demOnstrate compliance with 

these limitations to the South Carolina pepartinent of Health 'and Environmental Control by 

either' sampling and analyzing for the pollutants, in the discharge or providing mass balance 

calculations to demonstrate 'that use of particular maintenance chemicals will not result in 

detectable amounts of the toxic pollutants in the discharge. 

PART III

Page: 24 of 27

- Permit No. SC0004278

7. The permittee shall monitor all parameters consistent with conditions established by this permit

on the 1st Tuesday of every calendar month; unless'otherwise appioved by this'Department.

Should the 1st Tuesday fall on a holiday, monitoring may be conducted on the following work

day. Additional monitoring, as necessary to meet the frequency requirements of this permit (Part

I.A. Effluent Limitations and Monitoring Requirements) shall be'performed by the permittee.

Toxicity monitoring shall be conducted at the frequency lstafed in Part I.B. -Effluent Toxicity

Limitations and Monitoring Requirements. The permittee shall notify the Department two (2)

weeks prior to any changes in the monitoring schedule.;

8. Unless authorized elsewhere in this permit, the permittee shall meet the following requirements

concerning maintenance chemicals for the following waste streams: once-through non-contact

cooling water, and cooling tower blowdown. Maintenance chemicals shall be defined as any

man-induced additives to the above-referenced waste streams. This includes materials added for

corrosion inhibition including zinc chromium, and phosphorus. -. ; - r -* t *

a. The discharge, in detectable amounts, of any of the one hundred and twenty-six priority

pollutants is prohibited, if the pollutants are present due to the use of maintenance

chemicals.

b. Slimicides, algicides' and biocides' shall be used in accordance with registration

requirements of the Federal Insecticide, Fungicide and Rodenticide Act.'

c The use of maintenance chemicals containing bis(tributyltin) oxide is prohibited unless

written approval is obtained from SCDHEC.

d. Any maintenance chemicals added to the above referenced -waste streams must degrade

rapidly, either'due to hydrolytic decomyosition or biodegradation. -~I' -- . ,.-. '. * . i . * ,

e. The discharge of maintenance 'chemicals added to waste streams must be limited to

concentrations which protect indigenous aquatic populations in the receiving stream and

shall not exceed the "no observed effect level (NOEL)".

The permittee shall keep sufficient documentation on-site which support that the above

requirements are being met. The information -shall -be made available for on-site review by

Department personnel during normal working hours. The occurrence of in-stream problems may

necessitate'the submittal of 'chemical additive data and may require a permit' modification to

include additional monitoring and limitations; The permittee may demonstrate compliance with

these limitations to the South Carolina Department of Health and Environmental Control by

either sampling and analyzing for the' pollutants in the discharge or providing mass balance

calculations to demonstrate that use of particular maintenance chemicals will not result in

detectable amounts of the toxic pollutants in the discharge.
II _ 

PART III 

Page 25 of 27 

Permit No. SC0004278 

9. The company shall notify the South Carolina Department of Health and Environmental Control in 

writing no later than sixty (60) days prior to instituting use of any additional maintenance 

chemicals in the systems identified in Part III.A.8. Such notification shall include: 

- Name and general composition of the maintenance chemical 

- Quantities to be used 

- Frequency of use 

- Proposed discharge concentration 

- EPA registration number, if applicable 

- Aquatic toxicity information 

101' All sludges, waste oil and solid and hazardous waste shall be properly disposed of in accordance 

with the rules and regulations of the SC DHEC Bureau of Land and Waste Management. 

11. The South Carolina Department of Health and Environmental Control has determined that 

pursuant to Section 316(a) of the Act that the thermal component of the discharge controlled by 

the temperature criteria on page 2 of this permit assures the protection and propagation of a 

balanced, indigenous population of fish, shellfish, and wildlife. 

12. Neither free available chlorine nor total residual chlorine may be discharged from any unit for 

more than two hours in any one day, and not more than one unit in any plant may 

discharge free available or total residual chlorine at any one time unless the permittee can 

demonstrate to SC DHEC that the units in a particular location cannot operate at or below 

this level of oxidation. 

13. (a) A three-brood chronic toxicity test shall be conducted at the frequency stated in Part 

I.B.Effluent Toxicity Limitations and Monitoring Requirements using a control and 

the chronic test concentration (CTC) of 100% effluent. 

The test shall be conducted using EPA Method 1002.0, which uses Ceriodaphnia 

dubia as the test organism; in accordance with "Short-Term Methods for Estimating 

Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms," 

(EPA/600/4-91/002; 3' ed.). 

(b) If the test group Ceriodaphnia dubia survival and/or reproduction is less than the 

control group survival and/or reproduction by a percent significant at the 0.01a 

level (99 percent one-ended confidence level), the test shall be deemed a failure. 

(c) The permittee must report on the discharge monitoring report (DMR) form whether 

the test passes or fails at the specified CTC. If the test fails, the number "1" shall 

be placed on the form. If the test passes, the number "0" shall be placed on the 

form. The DMR Attachment for Toxicity Test Results shall also be completed and 

submitted with the DMR. 

14. The permittee shall maintain at the permitted facility a record of the method(s) used in 

measuring the discharge flow: 

_ '- I 1 - _-

PART III

Page 25 of 27

Permit No. SC0004278

9. The company shall notify the South Carolina Department of Health and Environmental Control in

writing no later than sixty (60) days prior to instituting use of any additional maintenance

chemicals in the systems identified in Part 1II.A.8. Such notification shall include:

- Name and general composition of the maintenance chemical

- Quantities to be used

- Frequency of use

- Proposed discharge concentration

- EPA registration number, if applicable

- Aquatic toxicity information

A.

10.,' All sludges, waste oil and solid and hazardous waste shall be properly disposed of in accordance

with the rules and regulations of the SC DHEC Bureau of Land and Waste Management.

..

11. The South Carolina Department of Health and Environmental Control has determined that

pursuant to Section 316(a) of the Act that the thermal component of the discharge controlled by

the temperature criteria on page 2 of this permit assures the protection and propagation of a

balanced, indigenous population of fish, shellfish, and wildlife.

12. Neither free available chlorine nor total residual chlorine may be discharged from any unit for

more than two hours in any one day, and not more than one unit in any plant may

discharge free available or total residual chlorine at any one time unless the permittee can

demonstrate to SC DHEC that the units in a particular location cannot operate at or below

this level of oxidation.

13. (a) A three-brood chronic toxicity test shall be conducted at the frequency stated in Part

l.B.Effluent Toxicity Limitations and Monitoring Requirements using a control and

the chronic test concentration (CTC) of 100% effluent.

The test shall be conducted using EPA Method 1002.0, which uses Ceriodaphnia

dubia as the test organism, in accordance with "Short-Term Methods for Estimating

Chronic Toxicity of Effluents and Receiving Waters to Freshwater Organisms,"

(EPA/600/4-911002; 3r' ed.).

(b) If the test group Ceriodaphnia dubia survival and/or reproduction is less than the

control group survival and/or reproduction by a percent significant at the 0.01a

level (99 percent one-ended confidence level), the test shall be deemed a failure.

(c) The permittee must report on the discharge monitoring report (DMR) form whether

the test passes or fails at the specified CTC. If the test fails, the number " 1 " shall

be placed on the form. If the test passes, the number "0" shall be placed on the

form. The DMR Attachment for Toxicity Test Results shall also be completed and

submitted with the DMR.

14. The permittee shall maintain at the permitted facility a record of the method(s) used in

measuring the discharge flow:
PART III 

Page 26 of 27 

Permit No. SC0004278 

a) Estimate Pump Curve, Production Chart, Water Use Records, 

Valve Opening, Tank Volume 

b) Instantaneous -Bucket and Watch, Weir and Gauge, Parshall Flume. 

c) Continuous - Totalizer, Continuous Chart Recorder 

Records of any necessary calibrations ,must also be kept. This information shall be made 

available for on-site review by Department personnel during normal working hours. 

• 

5. The Watei Quality-Based Effluent Limitations (WQBEL) for the parameters listed are not 

quantifiable using EPA-approved analytical methods. Therefore, the Department has set a 

reporting threshold to measure the acceptable quantification level for these parameters. This 

reporting threshold does not authorize the discharge of any pollutant in excess of the WQBEL. 

a. For purposes of reporting, the Permittee shall use the reporting threshold equivalent to the 

Minimum Level. , The Minimum Level is defined as the concentration in a sample 

equivalent to the concentration of the lowest calibration standard analyzed in a specific 

analytical procedure assuming that all the method-specified sample weights, volumes, and 

processing steps have been followed. As ,such, the Permittee must conduct analyses in 

accordance with the method specified below and must utilize a standard equivalent to the 

concentration of the Minimum Level specified below: , 

Parameter Minimum Level 

Total Residual Chlorine (TRC) ; • . 0.05 mg/l. 

• 

b. For the purposes of reporting on the Discharge Monitoring Report (DMR), actual 

analytical results should be reported whenever possible. All analytical results should be 

reported whenever possible. All analytical values at or above the Minimum Level shall be 

reported as the measured :value. When results cannot be, quantified, values below the 

Mininium Level shall be reported as 70". 

16. Free Available Chlorine (FAC) arid Total Residrial.Chlorine.(TRC) procedures will be used to 

detect any oxidants present, such as sodium bromide and sodium.hypochlorite, rather than 

establishing limitations for Free Available Oxidant (FAO) and Total Residual Oxidant. 

17. Multiple grabs shall, consist of grab samples .collected at the approximate beginning of the 

period of Total Residual Chlorine (TRC) and/or Free Available Chlorine (FAC) discharge and 

once every twenty (20) minutes until :TRC or FAC is no longer present. 

18. Intake screen wash water, pump strainer backwash water, .fire protection water, and potable 

water systems may be discharged without limitations or monitoring requirements. Appropriate 

measures shall be taken to minimize any impact to the environmental. • • 

19. The permittee shall not store coal, soil nor other similar erodible materials in a manner in which 

runoff is uncontrolled, nor conduct construction activities in a manner, which produces 

uncontrolled runoff unless such uncontrolled runoff has been specifically approved by 

SCDHEC. "Uncontrolled" shall mean without sedimentation basin or other controls approved 

by SCDHEC. 

PART III

Page 26 of 27

Permit No. SC0004278

a) Estimate

b)

c)

Instantaneous

Continuous

- Pump Curve, Production Chart, Water Use Records,

Valve Opening, Tank Volume

- Bucket and Watch, Weir and Gauge, Parshall Flume

- Totalizer, Continuous Chart Recorder

Records of any necessary calibrations must also be kept. This information shall be made

available for on-site review by Department personnel during normal working hours.

15. The Water Quality-Based Effluent Limitations (WQBEL) for the parameters listed are not

quantifiable using EPA-approved analytical methods. Therefore, the Department has set a

-'.. reporting threshold to measure the acceptable quantification level for these parameters. This

reporting threshold does not authorize the discharge of any pollutant in excess of the WQBEL.

I , .

a. For purposes of reporting, the Permittee shall use the reporting threshold equivalent to the

Minimum Level. . The Minimum Level is defined as the concentration in a sample

equivalent to the concentration of the lowest calibration standard analyzed in a specific

analytical procedure assuming that all the method-specified sample weights, volumes, and

processing steps have been followed. As such, the Permittee must conduct analyses in

accordance with the method specified below and must utilize a standard equivalent to the

# concentration of the Minimum Level specified below:

Parameter Minimum Level

Total Residual Chlorine (TRC); 0.05 mg/I

b. For the purposes of reporting on the Discharge Monitoring Report (DMR), actual

analytical results should be reported whenever possible. All analytical results should be

reported whenever possible. All analytical values at or above the Minimum Level shall be

reported as the measured value. When results cannot be quantified, values below the

Minimum Level shall be reported as "0".

16. Free Available Chlorine (FAC) and Total Residual Chlorine (TRC) procedures will be used to

detect any oxidants present, such as sodium bromide and sodium hypochlorite, rather than

establishing limitations for Free Available Oxidant (FAO) and Total Residual Oxidant.

17. Multiple grabs shall consist of grab samples.collected at the approximate beginning of the

period of Total Residual Chlorine (TRC) and/or Free Available Chlorine (FAC) discharge and

once every twenty (20) minutes until TRC or FAC is no longer present.

18. Intake screen wash water, pump strainer backwash water, fire protection water, and potable

water systems may be discharged without limitations or monitoring requirements. Appropriate

measures shall be taken to minimize any impact to the environmental.

19. The permittee shall not store coal, soil nor other similar erodible materials in a manner in which

runoff is uncontrolled, nor. conduct construction activities in a manner, which produces

uncontrolled runoff unless such uncontrolled runoff has been specifically approved by

SCDHEC. "Uncontrolled" shall mean without sedimentation basin or other controls approved

by SCDHEC.
PART III 

Page 27 of 27 

Permit No. SC0004278 

20. Upset - (1) Definition. "Upset" means an exceptional incident in which there is unintentional and 

temporary noncompliance with technology based permit effluent limitations because of factors 

beyond the reasonable control of the permittee. An upset does not include noncompliance to the 

extent caused by operational error, improperly designed treatment facilities, inadequate treatment 

facilities, lack of preventive maintenance, or careless or improper operation. 

(2) Effect of an upset. An upset constitutes an affirmative defense to an action brought for 

noncompliance with such technology based permit effluent limitation if the requirements of 

paragraph (3) of this section are met. No determination made during administrative review of 

claims that noncompliance was caused by upset, and before an action for noncompliance, is 

final administrative action subject to judicial review. 

(3). 

 Conditions necessary for a demonstration of upset. A permittee who wishes to establish.the 

affirmative defense of upset shall demonstrate, through properly signed, contemporaneous 

operating logs, or other relevant evidence that: 

(i) An upset occurred and that the permittee can identify the cause(s) of the upset; 

(ii) The permitted facility was at the time being properly operated; and 

(iii) The permittee submitted notice of the upset as required in paragraph Part II.B.2 of this 

permit (24 hour notice). 

(iv) The permittee complied with any remedial measures required by Part II.C.3 of this permit 

(duty to mitigate). 

(4) Burden of proof. In any enforcement proceeding, the permittee seeking to establish the 

occurrence of an upset has the burden of proof. 

21. The once through noncontact cooling water system may be drained without limitations or monitoring 

requirements for maintenance activities provided that the Catawba Nuclear Station takes proper 

measures to minimize environmental impact from this activity. 

22. The permittee shall upon request make available for review and comment the test procedures for the 

analysis of parameters regulated by the permit which the State does not issue laboratory certification. 

23. The permittee shall monitor and report the total recoverable copper levels at Outfall 001 at a 

frequency of once per month for a period of two (2) years If after two (2) years of monitoring, it is 

determined that a total copper limitation is appropriate, the permit will be reopened and a limitation 

established with Schedule of Compliance if deemed necessary. If it is shown that a total copper limit 

is not necessary, then the monitoring requirement will be eliminated. 

24. The permittee shall monitor and report the temperature at Outfall 006 for a period of one (1) year. 

After one (1) year of monitoring, a report summarizing the sample results shall be submitted to the 

Department to be evaluated and to determine if a limit needed. If the monitoring data shows that a 

limitation is appropriate, the permit will be reopened and a limitation established. 

l I- l I

PART III

Page 27 of 27

Permit No. SC0004278

20. Upset - (1) Definition. "Upset" means an exceptional incident in which there is unintentional and

temporary noncompliance with technology based permit effluent limitations because of factors

beyond the reasonable control of the permittee. An upset does not include noncompliance to the

extent caused by operational error, improperly designed treatment facilities, inadequate treatment

facilities, lack of preventive maintenance, or careless or improper operation.

(2) Effect of an upset. An upset constitutes an affirmative defense to an action brought for

noncompliance with such technology based permit effluent limitation if the requirements of

paragraph (3) of this section are met. No determination made during administrative review of

claims that noncompliance was caused by upset, and before an action for noncompliance, is

final administrative action subject to judicial review.

(3) Conditions necessary for a demonstration of upset. A permittee who wishes to establish the

affirmative defense of upset shall demonstrate, through properly signed, contemporaneous

operating logs, or other relevant evidence that:

(i) An upset occurred and that the permittee can identify the cause(s) of the upset;

(ii) The permitted facility was at the time being properly operated; and

(iii) The permittee submitted notice of the upset as required in paragraph Part II.B.2 of this

permit (24 hour notice).

(iv) The permittee complied with any remedial measures required by Part II.C.3 of this permit

(duty to mitigate).

(4) Burden of proof. In any enforcement proceeding, the permittee seeking to establish the

occurrence of an upset has the burden of proof.

21. The once through noncontact cooling water system may be drained without limitations or monitoring

requirements for maintenance activities provided that the Catawba Nuclear Station takes proper

measures to minimize environmental impact from this activity.

22. The permittee shall upon request make available for review and comment the test procedures for the

analysis of parameters regulated by the permit which the State does not issue laboratory certification.

23. The permittee shall monitor and report the total recoverable copper levels at Outfall 001 at a

frequency of once per month for a period of two (2) years If after two (2) years of monitoring, it is

determined that a total copper limitation is appropriate, the permit will be reopened and a limitation

established with Schedule of Compliance if deemed necessary. If it is shown that a total copper limit

is not necessary, then the monitoring requirement will be eliminated.

24. The permittee shall monitor and report the temperature at Outfall 006 for a period of one (1) year.

After one (1) year of monitoring, a report summarizing the sample results shall be submitted to the

Department to be evaluated and to determine if a limit needed. If the monitoring data shows that a

limitation is appropriate, the permit will be reopened and a limitation established.
Rationale 

Page 1 of 47 

Permit No. SC0004278 

Duke Energy Co./Catawba Nuclear Station' 

NPDES Permit No. SC0004278 

Permitting Engineer: Timothy M. Eleazer 

Facility Rating: Major (EPA review required) 

Minor 0 (EPA review may be required; see below 

Permit application included in Attachment 1. 

• , • 

Facility Address: 4800 Concord Road, York, South Carolina 29745 (see map, 

*Attachment 2) • 

County: York 

Watershed: Basin 03 (Catawba-Santee River Basin) 

Issuance (New) 0 Reissuance 0 Modification 

If this application is for a new facility or expansion of an existing facility, an 

• antidegradation review may be required per the requirements of R.61-68.D. 

Facility Description (include SIC. code): This facility is 'a Nuclear Power Plant 

Generating Electric Power: SIC Code is 4911 

Outfalls are discussed in Section III of this rationale with a general Aescrirition of 

the discharge, treatment system, stream flows and other pertinent inforination 'abbut 

each outfall. 

• I 

. 

-41s any discharge subject to any of the Primary Industry CategorieS identified in 

R.61-9.122, Appendix A as listed at right? Yes (If yes, EPA ieview,reqUired.) •• • ' 

Indicate category(ies) applicable and Regulations' governing the. discharge: Steam • 

Electric Power Generating Point Source Category, 40 CFR Part 423 

Primary Industry Categories 

Adhesives and sealants 

AlUminum forming" 

Auto•and other lanndries 

Battery manufacturing 

• Coal mining 

, Coil coating 

• Copper forming 

Electrical and electronic components 

Electroplating 

Explosives manufacturing 

Foundries .• 

Gum and wood chemicals 

Inorganic chemicals manufacturing 

Iron and steel manufacturing 

Leather tanning and finishing 

Mechanical products manufacturing 

Nonferrous metal manufacturing 

Ore mining 

Organic chemicals manufacturing 

Paint and ink formulation • 

• Pesticides . ' - 

Petroleum refining , : 

'Pharmaceutical preparations 

Photographic equipment and supplies 

Plastics processing 

Plastic . 'and ' synthetic materials 

Manufacturing 

Porcelain enameling 

Printing and publishing 

Palp and imper mills 

,Rubber processing 

Soap and detergent manUfaCturing 

Steam electric power plants 

Textile Mills • Receiving Water: 001, 002, 003, 004, 005 and 006,- discharge to take Wylie 

Receiving Water Classification (see R.61-69 for water classifications): Fresh Water , 

—*Does any disCharge(s) have the potential to affect waters in inother state? • No (If yes, EPA review required.) 

Is any discharge to Impaired Waters?: Yes 

If Yes, list the monitoring station number and parameter(s) causing impairment: • CW-027, fecal coliform and CW-197, 

Copper • • 

• 

.-4Average Discharge Flow from outfall with largest average flow: (Qd) (MGD): 82 (from permit application) (EPA review 

required for any average discharge exceeding 05 MGD) , 

—*Is this pefmit for a Federal facility with a daily.average flow greater than 0.05 MGD (from all sources)? No-(If yes, EPA 

review required.) 

• • ' 

Data from Discharge Monitoring Reports (DMRs) and NPDES permit application (including all subiequent data presented) 

from 6/1/2001 - 5/1/2005 has been used to evaluate permit limitations. 

Rationale

Page l of 47

Permit No. SC0004278

Duke Energy Co./Catawba Nuclear Station

NPDES Permit No. SC0004278

Permitting Engineer. Timothy M. Ekazer

Facility Rating: Major m (EPA review required)

Minor a (EPA review may be required; see below)

Permit application included in Attachment 1.

Facility Address: 4800 Concord Road, York, South Carolina 29745 (see map,

'Attachment 2)

County: York

Watershed: Basin 03 (Catawba-Santee River Basin)

* .:,~ May.24,2005

Primary Industry Categories

Adhesives and sealants

Aluminum forming"

Auto and other laundries

; Battery manufacturing,

Coal mining

Coi coating';

Copper forming

Electrical and electronic components

Electroplating

Explosives manufacturing

Foundries

Gum and wood chemicals

inorganic chemicals manufacturing

Iron and steel manufacturing

Leather tanning and finishing

Mechanical products manufacturing

Nonferrous metal manufacturing

Ore mining

Organic chemicals manufacturing

Paint and ink formulation

Pesticides

Petroleum refining A II44rU&4rUff i rd5LIAIfan

Issuance (New) a] Reissuance D] Modification CD

If this application is for a new facility or expansion of an existing facility, an

antidegradation review may be required per the requirements of R.61-68.D.

Facility Description (include SIC, code): This facility is a Nuclear Power Plant

Generating Electric Power.-' SIC Code is 4911

Outfalls are discussed in Section m of this rationale with a general 'description of Photographic equipment and's

the discharge, treatment system, stream flows and other'pertinent information'abbut Plastics processing

each outfall. ' - ' ' 'a' Plstic. 'and synthetic , ,manufacturing

Porcelain enameling -HIs any discharge subject to any of the Primary Industry Categories identified in Pritint andpmublishing

R.61-9.122, Appendix A as listed at right? Yes (Ifyyes, EPA reviewreqqiiired.) * Pulp and paper mills

Indicate category(ies) applicable and Regulations'governing the discharge: Steamr Rubber processing

Electric Power Generating Point Source Category, 40 CFR Part 423' - Soap and detergent manufau Steam electric power plants

Receiving Water: 001, 002, 003, 004, 005 and 006,- discharge to Lake Wylie TextileMills

Receiving Water Classification (see R.61-69 for water classifications): Fresh Water

-+Does any dischargers) have the potential to affect waters in another'state? No (If yes, EPA ieview required.)

upplies

M

ring.

aterials

Is any discharge to Impaired Waters?: Yes - - ;

If Yes, list the monitoring station number and parameterfs) causing impairment: CW-027, fecal coliform and CW-1 97,

Copper . - . ;

|- Average Discharge Flow from outfall with largest average flow: (Qd) (MGD): 82 (from permit application) (EPA review

required for any average discharge exceeding 0.5 MGD)

-41s this permit for a Federal facility with a daily average flow greater than 0.05 MGD (from all sources)? No- (If yes, EPA

review required.)

Data from Discharge Monitoring Reports (DMRs) and NPDES permit application (including all subsequent data presented)

from 6/1/2001 - 5/1/2005 has been used to evaluate permit limitations.
Rationale 

Page 2 of 47 

Permit No. SC0004278 

I. GENERAL INFORMATION 

A. The effluent from this facility may be subject to the requirements of any of the following regulations: R.61-9.125, 

129, 133, and 403; 40 CFR Part 136; Subchapter N (40 CFR Parts 400 through 402 and 404 through 471); R.61-

9.503, R.61-9.504 and R.61-9.505. 

B. Authority: This permit is written in accordance with applicable laws and regulations including, but not limited to, 

Regulation 61-9, Regulation 61-68, Pollution Control Act and Clean Water Act. 

C. Under R.61-9.124.8 (Fact Sheet), a fact sheet shall be prepared for every draft permit for a major NPDES facility 

or activity, for every Class I sludge management facility, for every NPDES draft permit that incorporates a variance 

or requires an explanation under section 124.56(b), and for every draft permit which the Department finds is the 

subject of wide-spread public interest or raises major issues. 

• 

D. The conclusions noted in the Rationale establish proposed effluent limitations and permit requirements addressed 

in R.61-9.122.43 (Establishing Permit Conditions), R.61-9.122.44 (Establishing Limitations, Standards and other 

permit conditions) and other appropriate sections of R.61-9. 

H. RATIONALE GUIDANCE PROCEDURES 

A. The receiving waterbody 7Q10, annual average flow or other critical flow condition at the discharge point, and 

7Q10, annual average flow, or other critical flow condition at the boundary of the source water protection area 

above a proposed or existing drinking water intake (if applicable) are determined by the SCDHEC's Wasteload 

Allocation Section. The 7Q10, Annual Average Flow or other critical flow conditions are based on information 

published or verified by the USGS, an estimate extrapolation from published or verified USGS data or from data 

provided by the permittee. These flows may be adjusted by the Wasteload Allocation Section to account for 

existing water withdrawals that impact the flow. The 7Q10 (or 30Q5 if provided by the applicant), annual average 

flow at the discharge point, or other critical flow condition or 7Q10 (or 30Q5 if provided by the applicant), annual 

average flow or other critical flow condition at the boundary of the SWP area for a proposed or existing drinking 

water intake will be used to determine dilution factors, as appropriate, in accordance with R.61-68.C.4.a & 4.b for 

aquatic life, human health, and organoleptic effects respectively. 

B. Water and organism consumption and drinking water MCL data will be evaluated as human health values when 

calculating dilution factors. "The Department may, after Notice of Intent included in a notice of a proposed 

NPDES permit in accordance with Regulation 61-9.124.10, determine that drinking water MCLs or W/O shall not 

apply to discharges to those waterbodies where there is: no potential to affect an existing or proposed drinking 

water source and no state-approved source water protection area." For permitting purposes, a proposed drinking 

water source is one for which a complete permit application, including plans and specifications for the intake, is on 

file with the Department at the time of consideration of an NPDES permit application for a discharge that will 

affect or has the potential to affect the drinking water source." See R.61-68.E.14.c(5). The Department defines the 

source water protection (SWP) area to be the primary SWP area delineated by the Source-Water Assessment and 

Protection (SWAP) Program initiated by the EPA and required by the states to identify SWP areas to protect 

drinking water sources. Using the procedure described in the document entitled, "Determination of the Primary 

and Secondary Source-Water Protection Areas for Selected Surface-Water Public-Supply Systems in South 

Carolina, 1999," USGS Water Resource Investigations Report 00-4097, the primary SWP area for a drinking water 

intake is the area which encompasses all 14-digit Hydrologic Unit Code (HUC) basins that adjoin streams, 

tributaries, and reservoirs between an intake and the upstream 10-percent exceedance, 24-hour travel distance 

(TOT10). The entire basin above a drinking water intake has been designated as the SWP area where the drainage 

area is equal to or less than one HUC basin or is estimated to have less than 24-hours of instream travel time 

between the intake and the HUC basin in the headwaters of the drainage basin. 

'e

Rationale

Page 2 of 47

Permit No. SC0004278

I. GENERAL INFORMATION

A. The effluent from this facility may be subject to the requirements of any of the following regulations: R.61-9.125,

129, 133, and 403; 40 CFR Part 136; Subchapter N (40 CFR Parts 400 through 402 and 404 through 471); R.61-

9.503, R.61-9.504 and R.61-9.505.

B. Authority: This permit is written in accordance with applicable laws and regulations including, but not limited to,

Regulation 61-9, Regulation 61-68, Pollution Control Act and Clean Water Act.

C. Under R.61-9.124.8 (Fact Sheet), a fact sheet shall be prepared for every draft permit for a major NPDES facility

or activity, for every Class I sludge management facility, for every NPDES draft permit that incorporates a variance

or requires an explanation under section 124.56(b), and for every draft permit which the Department finds is the

subject of wide-spread public interest or raises major issues.

D. The conclusions noted in the Rationale establish proposed effluent limitations and permit requirements addressed

in R.61-9.122.43 (Establishing Permit Conditions), R.61-9.122.44 (Establishing Limitations, Standards and other

permit conditions) and other appropriate sections of R.61-9.

II. RATIONALE GUIDANCE PROCEDURES

A. The receiving waterbody 7Q10, annual average flow or other critical flow condition at the discharge point, and

7Q1 0, annual average flow, or other critical flow condition at the boundary of the source water protection area

above a proposed or existing drinking water intake (if applicable) are determined by the SCDHEC's Wasteload

Allocation Section. The 7Q10, Annual Average Flow or other critical flow conditions are based on information

published or verified by the USGS, an estimate extrapolation from published or verified USGS data or from data

provided by the permittee. These flows may be adjusted by the Wasteload Allocation Section to account for

existing water withdrawals that impact the flow. The 7Q10 (or 30Q5 if provided by the applicant), annual average

flow at the discharge point, or other critical flow condition or 7Q10 (or 30Q5 if provided by the applicant), annual

average flow or other critical flow condition at the boundary of the SWP area for a proposed or existing drinking

water intake will be used to determine dilution factors, as appropriate, in accordance with R.61-68.C.4.a & 4.b for

aquatic life, human health, and organoleptic effects respectively.

B. Water and organism consumption and drinking water MCL data will be evaluated as human health values when

calculating dilution factors. "The Department may, after Notice of Intent included in a notice of a proposed

NPDES permit in accordance with Regulation 61-9.124.10, determine that drinking water MCLs or W/O shall not

apply to discharges to those waterbodies where there is: no potential to affect an existing or proposed drinking

water source and no state-approved source water protection area." For permitting purposes, a proposed drinking

water source is one for which a complete permit application, including plans and specifications for the intake, is on

file with the Department at the time of consideration of an NPDES permit application for a discharge that will

affect or has the potential to affect the drinking water source." See R.61-68.E.14.c(5). The Department defines the

source water protection (SWP) area to be the primary SWP area delineated by the Source-Water Assessment and

Protection (SWAP) Program initiated by the EPA and required by the states to identify SWP areas to protect

drinking water sources. Using the procedure described in the document entitled, "Determination of the Primary

and Secondary Source-Water Protection Areas for Selected Surface-Water Public-Supply Systems in South

Carolina, 1999," USGS Water Resource Investigations Report 004097, the primary SWP area for a drinking water

intake is the area which encompasses all 14-digit Hydrologic Unit Code (HUC) basins that adjoin streams,

tributaries, and reservoirs between an intake and the upstream 10-percent exceedance, 24-hour travel distance

(TOTo). The entire basin above a drinking water intake has been designated as the SWP area where the drainage

area is equal to or less than one HUC basin or is estimated to have less than 24-hours of instream travel time

between the intake and the HUC basin in the headwaters of the drainage basin.
Rationale 

Page 3 of 47 

Permit No. SC0004278 

, • 

C. Application of numeric criteria to protect human health: If 'separate numeric 'criteria are given for organism 

consumption, water and organism consumption (W/O), and drinking water Maximum Contaminant Levels 

(MCLs), .they shall be applied as appropriate: "The most stringent of the criteria shall be applied to protect the 

existing and classified uses of the waters of the State. See R:61-68.E.14.b(1). 

D. Numeric criteria have been established in R.61-68 based on organoleptic data (prevention of undesirable taste and 

odor). For those substances which have aquatic life and/or human health numeric criteria and organoleptic numeric 

criteria, the most stringent of the three shall be used for derivation of permit effluent limitations. See R.61-68.E.13. 

E. Sampling Frequency: SaMples and measurements taken for the purpose of monitoring shall be representative of the 

monitored activity. Monitoring results must be conducted according to test.rocedures approved under 40 CFR Part 

136, unless other test procedures haVe been specified in•the permit (R.61-9.122.41). Typically requirements to 

report monitoring results shall be established on a ease-by-case basis with a frequency dependent on the nature and 

effect of the discharge bin in no case less than once a. year (R.61-9.122.44) 

F. Compliance Schedules: 

1. A person issued an NPDES permit by the Department who is not in compliance with applicable effluent 

standards and limitations or other requirements contained therein at the time the permit is issued, shall be 

required to achieve compliance within a period of lime .as 'set 'forth by the Department, with effluent standards 

and limitations, with Water quality standards, or with specific requirements or conditions set by the Department. 

The Department shall require compliance with terms and conditions of the permit in the shortest reasonable 

period of time as determined thereby or within a time schedule for compliance which shall be specified in the 

issued permit. 

2: If a time schedule for compliance , speCified in an NPDES • perinit which is established by the Department, 

exceeds 'nine (9j months, the time schedule 'shall provide for interim dates of achievement for compliance with 

• 

certain applicable terms and conditions of the • (R.61-.9.122A7) 

G. Procedure for establishing effluent limitations: 

1. 

Demand (U0D), DisiolVed Oxygen (DO), Total •Airuirionia NitrOgen (as N), and Nutrients "are established by 

Effluent limits (mass and concentration) fof FiVe day Biochemical Oxygen Demand .(BOD5), Ultimate Oxygen 

the Wasteload Allocation (WLA) Section, wit h consideration•given to technologY-based limitations. 

• 1 • 

a. Five day. Biochemical 'OXygen Demand BODs,-,Ultimate Oxygen "Demand (UOD), Dissolved Oxygen .

Effluent limits for 'conventional oxygen dernatiding constituents (BOD5, UOD and DO) are established to 

proteCt in-stream water quality and uses, 'while utilizing :a portion of the assimilative capacity of the 

receiving water. The ability of a water body to assimilate oxygen-demanding substances is a function of its 

physical and chemical characteristics above "and below the discharge point. Various mathematical 

techniques; called models, have been 'developed 'to estimate this capacity. The Department follows the 

procedures as Outlined in • the "State/EPA Region IV Agreement on the 'Development of Wasteload 

Allocations/Total Maximum Daily Loads and NPDES Permit Limitations" dated October 30, 1991 (as 

updated) for determinink the'assimilative capacity of a given water body. Mathethatical models such as 

QUAL2E and QUAL2E-UNCAS are used in accordance with "EnhanCed Stream Water Quality Models 

QUAL2E and QUAL2E-UNCAS: Documentation and Users Manual" (EPA/600/3-87/007; dated May 

1987) as uPdated.' BOD3 and UOD values determined from.modeling resaltS will be used in permitting as 

Rationale

; - Page 3 of 47

Permit No. SC0004278

C. Application of numeric criteria to protect human health: If separate numeric 'criteria are given for organism

consumption, water and organism consumption (W/O), and drinkdng water Maximum Contaminant Levels

(MCLs), they shall be applied as appropriate.' The most stringent of the criteria shall bi applied to protect the

existing and classified uses of the waters of the State. See R.61-68.E.14.b(1).

D. Numeric criteria have been established in R.61-68 based on cr'anoleptic data (prevention of undesirable taste and

odor). For those substances which have aquatic life and/or human health numeric criteria and organoleptic numeric

criteria, the most stringent of the three shall be used for derivation of permit effluent limitations. See R.61-68.E.13.

E. Sampling Frequency: Saimples and measurements 'taken for the purpose of monitoring shall be representative of the

monitored activity. Monitoring results must be conducted according to test procedures approved under 40 CFR Part

136, unless other test procedures have been specified in the permit (R.61-9.122.41). Typically requirements to

report monitoring results shall be established on a case-by-case basis with a frequency dependent on the nature and

effect of the discharge but in no case less than once a. year (R.61-9.122.44)

F. Compliance Schedules:

1. A person issued an NPDES permit by the Department who is not in compliance with applicable effluent

standards and limitations or other requirements contained therein at the time the permnit is issued, shall be

required to achieve compliance within a period of time as set forth by the Department, with effluent standards

and limitations, with water quality standards, or with specific requirements or conditions set by the Department.

The Department shall require compliance with terms and conditions 'of the permit in the shortest reasonable

period of time as determined thereby or within a time schedule for compliance which shall be specified in the

issued permit.

2. If a time schedule for compliance specified in an NPDES permit'which is established by the Department,

exceeds'nine (9) months, the time schedule'shall provide for interim dates of achievement for compliance with

certain applicable terms and conditions of thepermit. (R.61-9.122.47);

G. Procedure for establishing effluent limitations:

I. Effluent iimits (mass and concentration) for Five day Biochemical Oxygen Demand '(BODe), Ultimate Oxygen

Demand (UOD), Dissolved Oxygen' (DO), Total -Amunionia Nitrbgen (as N), and Nutrients are established by

the Wasteload Allocation (WLA) Section, with consideration 'given to technology-bised limitations.

a. Five day Biochemical Oxygen Demand BODS Ultimate Oxygen 'Demand (UOD), Dissolved Oxygen

(DO):

Effluent limits for conventional oxygen deraniding constituents (BOD5', UOD'and DO) are established to

protect in-stream water quality and uses,bwhile utilizing a portion of the assimilative capacity of the

receiving water. The ability of a water body to assimilate oxygen-demanding substances is a function of its

physical and chemical characteristics above and below the'discharge point. Various mathematical

techniques, called models, have been developed'pto estimate this capacity. The Department follows the

procedures as'outlined in the "State/EPA Region IV Agreement on the'Development of Wasteload

Allocations/Total Maximum Daily Loads and NPDES Permit Limitations" dated October 30, 1991 (as

updated) for determining the'assimilative capacity of a given water body. Mathematical models such as

QUAL2E and QUAL2E-UNCAS are used in accordance with "Enhanced Stream Water Quality Models

QUAL2E and QUAL2E-UNCAS: Documentation and Users Manual" (EPAI600/3-87/007; dated May

1987) as updated. BOD' and UOD values determined from modeling results will be used in permitting as
Rationale 

Page 4 of 47 

Permit No. SC0004278 

monthly average derived limits (Cwia). Daily maximum derived limits will typically be determined by 

multiplying the monthly average value by two. 

For facilities subject to effluent guidelines limitations or other technology-based limitations, BODswill 

also be evaluated in accordance with the applicable industrial categorical guidelines. These parameters 

will be identified in Part III of this rationale when they are applicable to the permit. 

b. Total Ammonia Nitrogen (as N): 

Ammonia limitations based on oxygen demand will be determined from modeling information as described 

above. These values will be used as monthly average derived limits and a daily maximum will typically be 

determined by multiplying the monthly average derived limit by two. These values will be compared with 

the ammonia water quality criteria for protection of aquatic life from Regulation 61-68, Attachment 3 and 

any categorical limitations. The more stringent of the limitations will be imposed. Calculations for aquatic 

life criteria and other wasteload recommendations will be shown later in Part III of this rationale when 

ammonia is a pollutant of concern. 

c. Discharges of Nutrients: 

In order to protect and maintain lakes and other waters of the State, consideration is given to the control of 

nutrients reaching the waters of the State. Therefore, in accordance with regulation R.61-68.E.11, the 

Department controls the nutrients as prescribed below. Nutrient limitations will be determined from the 

best available information and/or modeling performed by the Wasteload Allocation Section to meet these 

water quality standards. 

i. Discharges of nutrients from all sources, including point and nonpoint, to waters of the State shall be 

prohibited or limited if the discharge would result in or if the waters experience growths of 

microscopic or macroscopic vegetation such that the water quality standards would be violated or the 

existing or classified uses of the waters would be impaired. Loading of nutrients shall be addressed on 

an individual basis as necessary to ensure compliance with the narrative and numeric criteria. 

ii. Numeric nutrient criteria for lakes are based on an ecoregional approach which takes into account the 

geographic location of the lakes within the State and are listed below. These numeric criteria are 

applicable to lakes of 40 acres cr more. Lakes of less than 40 acres will continue to be protected by 

the narrative criteria. 

1. for the Blue Ridge Mountains ecoregion of the State, total phosphorus shall not exceed 0.02 mg/1, 

chlorophyll a shall not exceed 10 ug/1, and total nitrogen shall not exceed 0.35 mg/1 

2. for the Piedmont and Southeastern Plains ecoregions of the State, total phosphorus shall not 

exceed 0.06 mg/I, chlorophyll a shall not exceed 40 ug/1, and total nitrogen shall not exceed 1.50 

mg/1 

3. for the Middle Atlantic Coastal Plains ecoregion of the State, total phosphorus shall not exceed 

0.09 mg/l, chlorophyll a shall not exceed 40 ug/I, and total nitrogen shall not exceed 1.50 mg/I. 

iii. In evaluating the effects of nutrients upon the quality of lakes and other waters of the State, the 

Department may consider, but not be limited to, such factors as the hydrology and morphometry of the 

waterbody, the existing and projected trophic state, characteristics of the loadings, and other control 

mechanisms in order to protect the existing and classified uses of the waters. 

- LL

Rationale

Page 4 of 47

Permit No. SC0004278

monthly average derived limits (C*). Daily maximum derived limits will typically be determined by

multiplying the monthly average value by two.

For facilities subject to effluent guidelines limitations or other technology-based limitations, BOD5 will

also be evaluated in accordance with the applicable industrial categorical guidelines. These parameters

will be identified in Part III of this rationale when they are applicable to the permit.

b. Total Ammonia Nitrogen (as N):

Ammonia limitations based on oxygen demand will be determined from modeling information as described

above. These values will be used as monthly average derived limits and a daily maximum will typically be

determined by multiplying the monthly average derived limit by two. These values will be compared with

the ammonia water quality criteria for protection of aquatic life from Regulation 61-68, Attachment 3 and

any categorical limitations. The more stringent of the limitations will be imposed. Calculations for aquatic

life criteria and other wasteload recommendations will be shown later in Part Im of this rationale when

ammonia is a pollutant of concern.

c. Discharges of Nutrients:

In order to protect and maintain lakes and other waters of the State, consideration is given to the control of

nutrients reaching the waters of the State. Therefore, in accordance with regulation R.61-68.E. II, the

Department controls the nutrients as prescribed below. Nutrient limitations will be determined from the

best available information and/or modeling performed by the Wasteload Allocation Section to meet these

water quality standards.

i. Discharges of nutrients from all sources, including point and nonpoint, to waters of the State shall be

prohibited or limited if the discharge would result in or if the waters experience growths of

microscopic or macroscopic vegetation such that the water quality standards would be violated or the

existing or classified uses of the waters would be impaired. Loading of nutrients shall be addressed on

an individual basis as necessary to ensure compliance with the narrative and numeric criteria.

ii. Numeric nutrient criteria for lakes are based on an ecoregional approach which takes into account the

geographic location of the lakes within the State and are listed below. These numeric criteria are

applicable to lakes of 40 acres cr more. Lakes of less than 40 acres will continue to be protected by

the narrative criteria.

I. for the Blue Ridge Mountains ecoregion of the State, total phosphorus shall not exceed 0.02 mg/l,

chlorophyll a shall not exceed 10 ug/l, and total nitrogen shall not exceed 0.35 mg/I

2. for the Piedmont and Southeastern Plains ecoregions of the State, total phosphorus shall not

exceed 0.06 mg/I, chlorophyll a shall not exceed 40 ug/l, and total nitrogen shall not exceed 1.50

mg/l

3. for the Middle Atlantic Coastal Plains ecoregion of the State, total phosphorus shall not exceed

0.09 mg/I, chlorophyll a shall not exceed 40 ug/l, and total nitrogen shall not exceed 1.50 mg/l.

iii. In evaluating the effects of nutrients upon the quality of lakes and other waters of the State, the

Department may consider, but not be limited to, such factors as the hydrology and morphometry of the

waterbody, the existing and projected trophic state, characteristics of the loadings, and other control

mechanisms in order to protect the existing and classified uses of the waters.
Rationale 

Page 5 of 47 

Permit No. SC0004278 

iv. The Department shall take appropriate action, to include; but not limited to: establishing numeric 

effluent limitations in permits, establishing Total Maximum Daily Loads, establishing waste load 

allocations, and establishing load allocations for nutrients to ensure that the lakes attain and maintain 

the above narrative and numeric criteria and other applicable water quality standards. 

v. The criteria specific to lakes shall be applicable to all portions of the lake. For this purpose, the 

Department shall define the applicable area to be that area covered •when measured at full pool 

elevation. 

2. Effluent concentration limits (Cd/i,„) for parameters other than the parameters liSted in G.l.a-c above are 

established using the following procedures: 

QV" 7Q10 or other critical flow Condition of the receiving water at the discharge point in mgd. 

(may require adjustment for withdrawals) •• 

AAF, • Average Annual Flow (AAF) or other critical flow condition of the receiving water at the 

discharge point in mgd. (may require adjustment for withdrawals) 

Qkna • 7Q10 or other critical flow condition of the receiving water at the SWP Area boundary in mgd. 

AAF, Average Annual Flow (AAF) of the receiving water at the SWP Area boundary in mgd. 

Long term average discharge flow in mgd. 

a; Determine dilution factors: 

The following information is to be used (where applicable) for establishing effluent concentration limits: 

Dilution factor based on 7Q10 or other critical flow condition of the receiving water at the 

discharge point (NO. This dilution factor is used to determine the derived limits for protection of 

the following aqtiatic life and human health concerns for thereasons indicated: 

• 

i. Aquatic Life (see R.61-68.CA.a(1)). ,Proteetion of aquatic life on a short-term basis is needed 

at the point where aquatic organisms become exposed to the discharge. 

ii. Human Health Organism Consumption :for parameters ,identified as non-carcinogens per 

R.61-68.CA.b(1). Protection for lhuman..health on a shOit=term .basis for consumption of 

. 'aquatic organisnis is• needed at the point; the aquatic organisms become exposed to the 

discharge. 

DF =

(12700 Qd). 

1 

Qd 

DF2: Dilution factor, at the discharge point, based on the Average Annual Flow of the receiving water at 

the discharge point (AAFd). This dilution factor is used to determine the derived limits for 

protection of the following human health and organoleptic concerns for the reasons indicated: 

i. Human Health — Organism Consumption for parameters identified as carcinogens per R.61- 

68.C.4.b(1). Protection for human health on a long-term basis to prevent cancer due to 

consumption of aquatic organisms is needed at the point the aquatic organisms become 

exposed to the discharge where it enters the receiving water. 

ii. Organoleptic effects per R.61-68.C.4.b(1).. Protection for taste and odor issues related to the 

DF1: 

• 

Rationale

Page 5 of 47

Permit No. SC0004278

iv. The Department shall take appropriate action, to include, but not limited to: establishing numeric

effluent limitations in permits, establishing Total Maximum Daily Loads, establishing waste load

allocations, and establishing load allocations for nutrients to ensure that the lakes attain and maintain

the above narrative and numeric criteria and other applicable water quality standards.

v. The criteria specific to lakes shall be applicable to all portions of the lake. For this purpose, the

Department shall define the applicable area to be that area covered when' measured at full pool

elevation.

2. Effluent concentration limits (Cffl,,,) for parameters other than the parameters listed in G.L.a-c above are

established using the following procedures:

Q'I0 -7Q10 or other critical flow condition of the receiving water at the discharge point in mgd.

(may require adjustment for withdrawals)

AAF* Average Annual Flow (AAF) or other. critical flow condition of the receiving water at the

discharge point in mgd. (mnay require adjustment for withdrawals)

Qiozoi 7Q10 or other critical flow condition of the receiving water at the SWP Area boundary in mgd.

AAF, Average Annual Flow (AAF) of the receiving water at the SWP Area boundary in mgd.

Q. Long term average discharge flow in ingd.

a. Determine dilution factors: - -

The following infornation is to be used (where applicable) for establishing effluent concentration limits:

DF,: Dilution factor based on 7Q10 or other critical flow condition of the receiving water at the

discharge point (Q,,). This dilution factor is used to determine the derived limits for protection of

the following aquatic life and human health concerns for the reasons indicated:

i. Aquatic Life (see R.61-68.C.4.a(l)). Protection of aq uatic life on a short-term basis is needed

at the point where aquatic organisms become exposed to the discharge.

ii. Human Health - Organism Consumption.for parameters;identified as non-carcinogens per

' - R.61-68.C.4.b(l). Protection for-humanivhealth on a short-term.basis for consumption of

-. aquatic organisms is needed at the point;the aquatic organisms become exposed to the

discharge.

-~Q DF,= (e3 QQ;d, : .- - : - DF2: ; Dilution factor, at the discharge point, based on the Average Annual Flow of the receiving water at

the discharge point (AAFdj. This dilution'factor is used'to determine the derived limits for

protection of the following human health and organoleptic concerns for the reasons indicated:

i. Human Health - Organism Consumption for parameters identified as carcinogens per R.61-

68.C.4.b(l). Protection for human health -on a long-term basis to prevent cancer due to

consumption of aquatic organisms is needed at the point the aquatic organisms become

exposed to the discharge where it enters the receiving water.

ii. Organoleptic effects per R.61-68.C.4.b(l). Protection for taste and odor issues related to the
Rationale 

Page 6 of 47 

Permit No. SC0004278 

discharge is needed at the point where the discharge enters the receiving water. 

AAF +Q 

DF2 =i `6,f 

DF3: Dilution factor based on the 7Q10 or other critical flow condition at the source water protection 

area boundary for protection of a proposed or existing water intake downstream of the discharge 

(Q,g,o). This dilution factor is used to determine the derived limits for protection of the following 

human health concerns for the reasons indicated: 

i. Human Health — Water and Organism Consumption for parameters identified as noncarcinogens per R.61-68.C.4.b(1) and E.14.c(5) to protect for short-term health effects when 

the discharge is above any drinking water intake. Protection of human health relative to 

drinking the water from the waterbody and consuming aquatic organisms from the same 

waterbody is provided by this criterion, but drinking the water withdrawn from the waterbody 

may require a potentially higher level of protection in terms of applicable dilution than 

consumption of organisms. In addition, to satisfy the requirements of R.61-68.C.10(a), the 

Department has determined that dilution at the boundary of the Source Water Protection area 

will protect the drinking water intake to meet this requirement. 

For discharges affecting the primary SWP area, dilution will be determined using the largest 

TOT„ flow along the SWP area boundary upstream of the drinking water intake of concern. If 

multiple drinking water intakes are present below the discharge, the SWP area of the intake 

closest to the discharge will be protected. If the entire basin is designated as the SWP area, the 

boundary will be the TOT„ at the beginning of the basin, even if it is outside the State 

boundaries (e.g. North Carolina). 

ii. Human Health - Drinking Water Maximum Contaminant Level (MCL) for parameters 

identified as non-carcinogens per R.61-68.C.4.b(1) and E.14.c(5) to protect for short-term 

health effects when the discharge is above any drinking water intake. Protection of human 

health relative to drinking the water from the waterbody after conventional treatment per R.61-

68.G is provided by this criterion. In addition, to satisfy the requirements of R.61-68.C.10(a), 

the Department has determined that dilution at the boundary of the Source Water Protection 

area will protect the drinking water intake to meet this requirement. 

For discharges affecting the primary SWP area, dilution will be determined using the largest 

TOT,oflow along the SWP area boundary upstream of the drinking water intake of concern. If 

multiple drinking water intakes are present below the discharge, the SWP area of the intake 

closest to the discharge will be protected. If the entire basin is designated as the SWP area, the 

boundary will be the TOTH, at the beginning of the basin, even if it is outside the State 

boundaries (e.g. North Carolina). 

DF3 = (Q7Q101 + Qd) 

Qd 

DF.: Dilution factor based on the Average Annual Flow at the source water protection area boundary 

for protection of a proposed or existing water intake downstream of the discharge (AAF I). 

lU

Rationale

Page 6 of 47

Permit No. SC0004278

discharge is needed at the point where the discharge enters the receiving water.

DF2 = + QdIAAFd 

Qd )

DF,: Dilution factor based on the 7Q10 or other critical flow condition at the source water protection

area boundary for protection of a proposed or existing water intake downstream of the discharge

(Q7Q~'l). This dilution factor is used to determine the derived limits for protection of the following

human health concerns for the reasons indicated:

i. Human Health - Water and Organism Consumption for parameters identified as noncarcinogens per R.61-68.C.4.b(l) and E.14.c(5) to protect for short-term health effects when

the discharge is above any drinking water intake. Protection of human health relative to

drinking the water from the waterbody and consuming aquatic organisms from the same

waterbody is provided by this criterion, but drinking the water withdrawn from the waterbody

may require a potentially higher level of protection in terms of applicable dilution than

consumption of organisms. In addition, to satisfy the requirements of R.61-68.C.10(a), the

Department has determined that dilution at the boundary of the Source Water Protection area

will protect the drinking water intake to meet this requirement.

For discharges affecting the primary SWP area, dilution will be determined using the largest

TOT,1 flow along the SWP area boundary upstream of the drinking water intake of concern. If

multiple drinking water intakes are present below the discharge, the SWP area of the intake

closest to the discharge will be protected. If the entire basin is designated as the SWP area, the

boundary will be the TOT,O at the beginning of the basin, even if it is outside the State

boundaries (e.g. North Carolina).

ii. Human Health - Drinking Water Maximum Contaminant Level (MCL) for parameters

identified as non-carcinogens per R.61-68.C.4.b(l) and E.14.c(5) to protect for short-term

health effects when the discharge is above any drinking water intake. Protection of human

health relative to drinking the water from the waterbody after conventional treatment per R.61-

68.G is provided by this criterion. In addition, to satisfy the requirements of R.61-68.C.10(a),

the Department has determined that dilution at the boundary of the Source Water Protection

area will protect the drinking water intake to meet this requirement.

For discharges affecting the primary SWP area, dilution will be determined using the largest

TOTO flow along the SWP area boundary upstream of the drinking water intake of concern. If

multiple drinking water intakes are present below the discharge, the SWP area of the intake

closest to the discharge will be protected. If the entire basin is designated as the SWP area, the

boundary will be the TOTo at the beginning of the basin, even if it is outside the State

boundaries (e.g. North Carolina).

DF = ('Q7Qi + Qd

3 Qd )

DF,: Dilution factor based on the Average Annual Flow at the source water protection area boundary

for protection of a proposed or existing water intake downstream of the discharge (AAF,).
Rationale 

Page 7 of 47 

" Permit No. SC0004278 

This dilution factor is used to determine the derived limits for protection of the following human 

health concerns for the reasons indicated: 

• . .• 

i. Human Health—Water and Organism Consumption for parameters identified as carcinogens 

- per R.61-68.C.4.b(1) and E.14.c(5) to protect for long-term health effects due to cancer when 

the discharge is above any drinking water intake.. Protection of human health relative to 

drinking the water from .the waterbody and consuming aquatic organisms from the same 

waterbody is provided by this criterion, but drinking the_water withdrawn from the waterbody 

may require a potentially .higher, level of protection in ,terms : of. applicable dilution than 

consumption of organisms. : In addition, to satisfy the requirements of R.61-68.C.10(a), the 

• Department has determined that dilution at the boundary of the Source Water Protection area 

will protect the drinking water intake to meet this requirement. 

For discharges 'affecting the primary. SWP area, dilution will be determined using the largest 

TOT10floW along the SWP area boundary upstream of the drinking water intake of concern. If 

multiple drinking water intakes are present below the discharge, the SWP area of the intake 

closest to the discharge will be protected:; If the,entire basin is designated as the SWP area, the 

boundary will be the TOT,0at the beginning of the baSin, even if it is outside the State 

bo'undaries (e.g. North Carolina). •. 

ii. Human Health - Thinking Water Maximum Contaminant Level (MCL) for parameters 

identified as carcinogens per, R.61-68.CA.b(1) and E.14. .c(5) to protect for long-term health 

effects due to cancer when the discharge is above any drinking water intake. Protection of 

human health relative to drinking the water from the waterbody and consuming aquatic 

organisms from the same waterbody is provided by this criterion, but drinking the water 

withdrawn from the waterbody may require a potentially higher level of protection in terms of 

applicable dilution than consumption of organisms. , In addition, to satisfy the requirements of 

R.61-68.C.10(a), the Department has determined that dilution at the boundary of the Source 

Water Protection area will protect the drinking water intake to meet this requirement. 

For discharges affecting the primary SWP area, dilution will be determined using the largest 

TOT,; flow along the SWP area boundary upstream of the drinking water intake of concern. If 

Multiple drinking water intake's are preent below the discharge, the SWP area of the intake 

closest to the discharge will be protected. If the entire,baiin is designated as the SWP area, the 

boundary will be.the TOT10at the:beginning of the basin; even if it is outside the State 

boundaries (e.g. North Carolina). 

• . DF4 (1111Fs + d 

Qd 

• .1' 

b. Determine monthly average derived limits using the following procedures: 

WQS., Freshwater Standard (based on an established criteria or other published data per R.61-68) for 

protection of Aquatic Life; may be a CCC or CMC as defined below 

WQS.,, Standard (based on an established criteria or other published data per R.61-68), for protection of 

Human Health — Organism Consumption , • • 

WQ.S.., Standard (based on an 'established criteria or other published data per R.61-68), for protection of 

Human Health — Water & Organism Consumption. Applicable only if any portion of the mixing 

zone for this discharge 'is in a state-approved source water protection area for a proposed or 

existing water intake downstream of the discharge point. 

*; ' '; ! 5 -Rationale

Page 7 of 47

Permit No. SC0004278

This dilution factor is used to determine the derived limits for protection of the following human

health concerns for the reasons indicated:

i. Human Health-Water and Organism Consumption for parameters identified as carcinogens

per R.61-68.C.4.b(l) and E.14.c(5) to protect for long-term health effects due to cancer when

the discharge is above any drinking water intake. Protection of human health relative to

drinking the water from the waterbody and consuming aquatic organisms from the same

waterbody is provided by this criterion, but drinking the water withdrawn from the waterbody

may require a potentially higher.level of protection in terms of applicable dilution than

consumption of organisms. In addition, to satisfy the requirements of R.61-68.C.10(a), the

Department has determined that dilution at the boundary of the Source Water Protection area

will protect the drinking water intake to meet this requirement.

- For discharges'affecting the primary SWP area, dilution will be determined using the largest

TOT,0 flow along the SWP area boundary upstream of the drinking water intake of concern. If

multiple drinking water intakes are present below the' discharge, the SWP area of the intake

closest to the discharge'will be protected.-; If the entire basin is designated as the SWP area, the

boundary will be the TOTo at the beginning of the basin, even if it is outside the State

boundaries (e.g. North Carolina).

ii. Human Health - Drinking Water'Maximum Contaminant Level (MCL) for parameters

identified as carcinogens per R.61-68.CA.b(l) and E.14.c(5) to protect for long-term health

effects due to cancer when the discharge is above any drinking water intake. Protection of

human health relative to drinking the water from the waterbody and consuming aquatic

organisms from the same waterbody is provided by this criterion, but drinking the water

withdrawn from the waterbody may require a potentially higher level of protection in terms of

applicable dilution than consumption of organisms. In addition, to satisfy the requirements of

R.61-68.C.10(a), the Department has determined that dilution at the boundary of the Source

Water Protection area will protect the drinking water intake to meet this requirement.

For discharges affecting the primary SWP area, dilution will be determined using the largest

TOTC flow along the SW? area boundary upstream of the drinking water intake of concern. If

multiple drinking water intakes are present below the discharge, the SWP area of the intake

closest to the discharge will be protected. If the entirebain'is 'designated as the SWP area, the

boundary will be. the TOTIO at thle beginning of the 'basin, even if it is outside the State

boundaries (e.g. North Carolina).

*d (MQ. v J -d .

b. Determine monthly average derived lirmits using the following procedures:

WQS, Freshwater Standard (based on an established criteria or other published data per R.61-68) for

protection of Aquatic Life; may be a CCC or CMC as defined below

WQSOZ Standard (based on an established criteria or other published data per R.61-68), for protection of

Human Health - Organism Consumption

WQS. Standard (based on an established criteria or other published data per R.61-68), for protection of

Human Health - Water & Organism Consumption. Applicable only if any portion of the mixing

zone for this discharge is in a state-approved source water'protection area for a proposed or

existing water intake downstream of the discharge point.
Rationale 

Page 8 of 47 

Permit No. SC0004278 

WQS.d Standard (based on an established criteria or other published data per R.61-68), for Drinking 

Water MCL (Maximum Contaminant Level). Applicable only if any portion of the mixing zone 

for this discharge is in a state-approved source water protection area for a proposed or existing 

water intake downstream of the discharge point. 

WQS,: Standard (based on an established criteria or other published data per R.61-68), based on 

Organoleptic Data. 

Coq* Concentration limit derived from aquatic life data 

Cliff Concentration limit derived from human health data as determined from organism (C,), 

water/organism (C,,,,)and MCL (C.,,) data 

Cd Concentration limit derived from organoleptic data 

Ce Background concentration of the concerned parameter in mg/I is typically determined from 

ambient monitoring data or data provided by applicant. The 90thpercentile of ambient monitoring 

data for aquatic life protection for the parameters identified in the Appendix (Water Quality 

Numeric Criteria) to Regulation 61-68 from the last 3 years, or whatever is available if less than 3 

years, will typically be used per the procedures used for 303(d) listing. The median value of 

ambient monitoring data for human health protection for the parameters identified in the Appendix 

(Water Quality Numeric Criteria) to Regulation 61-68 from the last 3 years, or whatever is 

available if less than 3 years, will typically be used per the procedures used for 303(d) listing. The 

background concentration is assumed to be zero (0) in the absence of actual data based on 

Departmental guidance and EPA recommendation. 

i. Determine the derived limit for protection of Aquatic Life (C,300) 

1. The following guidelines apply to determining aquatic life limits: 

a. Typically, the Criterion Maximum Concentration (CMC) is applied as a daily maximum 

derived limit and the Criterion Continuous Concentration (CCC) is applied as a monthly 

average derived limit, after consideration of dilution and background concentrations. 

Exceptions exist based on EPA criteria and are indicated for specific parameters. The CMC 

and CCC for specific metals will be adjusted using the procedures in 60 FR 22229, "Water 

Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants; States' 

Compliance-Revision of Metals Criteria," May 4, 1995 and the "Technical Guidance on 

Interpretation and Implementation of Aquatic Life Metals Criteria," Oct. 1, 1993 and applied 

as a daily maximum and monthly average, respectively, after consideration of dilution and 

background concentrations. 

b. If only a CMC exists for a particular parameter, a daily maximum derived permit limit only 

(no monthly average) will be set using that value, after consideration of dilution and 

background concentrations. If only a CCC is given, it will be used as a monthly average 

derived limit and the daily maximum derived limit will be two (2) times the value obtained for 

the monthly average based on a simplified statistical procedure for determining permit limits 

recommended in Section 5.4.2 of the US EPA's "Technical Support Document for Water 

Quality-based Toxics Control", EPA/505/2-90-001, March 1991 (hereafter known as the 

TSD). 

c. If only an acute toxicity effect concentration for a number of species for a particular pollutant 

is given as a LC50, the lowest concentration should be divided by an acute-to-chronic ratio 

(ACR) of 10 and a sensitivity factor of 3.3, for an acceptable instream concentration in order 

to protect against chronic toxicity effects (from R.61-68.E.16.a(1)). Other acute toxicity data 

will be handled similarly. The value obtained from this calculation will be used as a monthly 

11 - L U

Rationale

Page 8 of 47

Permit No. SC0004278

WQS.4 Standard (based on an established criteria or other published data per R.61-68), for Drinking

Water MCL (Maximum Contaminant Lcvel). Applicable only if any portion of the mixing zone

for this discharge is in a state-approved source water protection area for a proposed or existing

water intake downstream of the discharge point.

WQSd: Standard (based on an established criteria or other published data per R.61-68), based on

Organoleptic Data.

C,,9,e Concentration limit derived from aquatic life data

CHH Concentration limit derived from human health data as determined from organism (CO),

water/organism (C,,)and MCL (Cd) data

CO4 Concentration limit derived from organoleptic data

Cb Background concentration of the concerned parameter in mg/I is typically determined from

ambient monitoring data or data provided by applicant. The 90' percentile of ambient monitoring

data for aquatic life protection for the parameters identified in the Appendix (Water Quality

Numeric Criteria) to Regulation 61-68 from the last 3 years, or whatever is available if less than 3

years, will typically be used per the procedures used for 303(d) listing. The median value of

ambient monitoring data for human health protection for the parameters identified in the Appendix

(Water Quality Numeric Criteria) to Regulation 61-68 from the last 3 years, or whatever is

available if less than 3 years, will typically be used per the procedures used for 303(d) listing. The

background concentration is assumed to be zero (0) in the absence of actual data based on

Departmental guidance and EPA recommendation.

i. Determine the derived limit for protection of Aquatic Life (C.,10)

1. The following guidelines apply to determining aquatic life limits:

a. Typically, the Criterion Maximum Concentration (CMC) is applied as a daily maximum

derived limit and the Criterion Continuous Concentration (CCC) is applied as a monthly

average derived limit, after consideration of dilution and background concentrations.

Exceptions exist based on EPA criteria and are indicated for specific parameters. The CMC

and CCC for specific metals will be adjusted using the procedures in 60 FR 22229, "Water

Quality Standards; Establishment of Numeric Criteria for Priority Toxic Pollutants; States'

Compliance-Revision of Metals Criteria," May 4, 1995 and the "Technical Guidance on

Interpretation and Implementation of Aquatic Life Metals Criteria," Oct. 1, 1993 and applied

as a daily maximum and monthly average, respectively, after consideration of dilution and

background concentrations.

b. If only a CMC exists for a particular parameter, a daily maximum derived permit limit only

(no monthly average) will be set using that value, after consideration of dilution and

background concentrations. If only a CCC is given, it will be used as a monthly average

derived limit and the daily maximum derived limit will be two (2) times the value obtained for

the monthly average based on a simplified statistical procedure for determining permit limits

recommended in Section 5.4.2 of the US EPA's "Technical Support Document for Water

Quality-based Toxics Control", EPA/505/2-90-001, March 1991 (hereafter known as the

TSD).

c. If only an acute toxicity effect concentration for a number of species for a particular pollutant

is given as a LC50, the lowest concentration should be divided by an acute-to-chronic ratio

(ACR) of 10 and a sensitivity factor of 3.3, for an acceptable instream concentration in order

to protect against chronic toxicity effects (from R.61-68.E.16.a(1)). Other acute toxicity data

will be handled similarly. The value obtained from this calculation will be used as a monthly
Rationale 

Page 9 of 47 

Permit No. SC0004278 

average derived limit after consideration of dilution and background concentrations. The daily 

maximum will :be two (2) times the value obtained for the monthly average based on a 

simplified statistical procedure for detennining permit limits recommended in Section 5.4.2 of 

the TSD. 

• 

d. If a chronic toxicity effect concentration for a number of species for a particular pollutant is 

given as a no observed • effect concentration (NOEC), the lowest concentration should be 

divided by a sensitivity factor of 3.3 in order to protect against chronic toxicity to the most 

sensitive species (from R.61-68.E.16.a(2)). Other chronic toxicity data will be handled 

Similarly. The value obtained from tbis.calculatioir.v,ill be,Used, is a monthly average derived 

limit after consideration of dilution and background, con cetrations. The daily maximum will 

be two (2) times:the value . obtained,for the monthly _averag based e on a simplified statistical 

.procedure for determining permit limits recommended in Section 5.4.2 of the TSD. 

e. If both acute and chronic data are;available for a particular pollutant, monthly average derived 

limit will be calculated as in c and d above for each acute and chronic, respectively. The more 

stringent of the monthly average deriyeii limits .will be the monthly average derived limit used 

after consideration of dilution and background coricentrat;ions. The daily maximum will be 

two (2) times the value obtained .for the,nionikily. average based on a simplified statistical 

procedure for determining permit limits recommended in Section 5.4.2 of the TSD. 

• • : 

2. Consider the background concentration AC.) ,of .the .parameter:of concern. • If the background 

concentration is equal to or greater than the applicable standard (WQS, as defined above) for the 

parameter of concern, then the derived concentration limit (C.,,o) for that parameter and for the 

protection of that standard, is established equal to the standard. (WQS). An exception exists where 

the naturally occurring instream concentration for, a substance is higher than the derived permit 

effluent limitation. In those situations, the Department may establish permit effluent limitations 

(Cop.) at a level higher .than the derived ,limit, but .no higher than the natural background 

concentration. In such .cases, the Department may reqiiire biological instream monitoring and/or 

whole effluent toxicity (WET) testing (See k.61!-68.E.14.c()). 

' . 

If Cb is not based on naturally occurring concentrations and 

- C bZ WQS' 

Then,•generally, : 

cure 

If Cbis based on =gill-ally occurring concentrations and 

Cb z. WQS 

_Then, generally,'_'_' . _ 

• C sof, C eff um. 4..5 C 

• 

Otherwise, the limits are established as described in Item 3 or 4 below. 

3. For the parameters listed in Table A below, Regulatidn R.61-68.E.14.c(4) provides for the use of 

the EPA Office of Water Policy and "Technical GuidanCe on Interpretation and Implementation of 

AqUatic Life Metals Criteria", October 1, 1993. A subsequent revision published in the Federal 

Register (60 FR 22229) on May 4, .1995 updated the data in the original report. See R.61-68 

Attachment 1 "Conversion Factors for Dissolved Metals" and Attachment 2 "Parameters for 

Rationale

Page9of47

Permit No. SC0004278

average derived limit after consideration of dilution and background concentrations. The daily

maximum will; be two (2) times the value obtained for the monthly average based on a

simplified statistical procedure for determining permit limits recommended in Section 5.4.2 of

the TSD.

d. If a chronic toxicity effect concentration for a number of species for a particular pollutant is

given as a no observed effect concentration (NOEC), the lowest concentration should be

divided by a sensitivity factor of 3.3 in order to protect against chronic toxicity to the most

sensitive species (from R.61-68.E.16.a(2)). Other chronic toxicity data will be handled

similarly. The value obtained from this calculation will beused as a monthly average derived

limit after consideration of dilution and background conceltrations. The daily maximum will

be two (2) times the value obtained for the monthly.average based on a simplified statistical

procedure for determining permit linits recommended in Section 5..2 of the TSD.

e. If both acute and chronic data are available for a particular pollutant, monthly average derived

limit will be calculated as in c and d above for each acute and chronic, respectively. The more

stringent of the monthly average derived limits will be the monthly average derived limit used

after consideration of dilution and background conicentrations. The daily maximum will be

two (2) times the value obtained for the monthly. average based on a simplified statistical

procedure for determining pennit limits recommended in Section 5.4.2 of the TSD.

2. Consider the background concentration (Cb),of .the parameter of concern. If the background

concentration is equal to or greater than the applicable standard (WQS, as defined above) for the

parameter of concern, then the derived concentration limit (C.u) for that parameter and for the

protection of that standard, is established equal to the standard (WQS). An exception exists where

the naturally occurring instream concentration for, a substance is higher than the derived permit

effluent limitation. In those situations, the Department may establish permit effluent limitations

(C<p,,) at a level higher -than the derived limit, but .no higher than the natural background

concentration. In such cases, the Department may require biological instream monitoring and/or

whole effluent toxicity (WET) testing (See R.61-68.E.14.c(2)). i.e.'

If Cb is not based on naturally occurring concentrations and

Cb WQSThen, generally, 1 -

C.qlie =

If Cb is based on naturally occurring concentrations and

C b WQS

-Then, generally,; -. .

Cqije < Cb Iim < Cb . .

Otherwise, the limits are established as described in Item 3 or 4 below.

3. For the parameters listed in Table A below, Regulation R.61 68.E.14.c(4) provides for the use of

the EPA Office of Water Policy and "Technical Guidance on Interpretation and Implementation of

Aquatic Life Metals'Criteria", October 1, 1993.' A subsequent revision published in the Federal

Register (60 FR 22229) on May 4, 1995:updated the data in the original report. See R.61-68

Attachment I "Conversion Factors for Dissolved Metals" and Attachment 2 "Parameters for
Rationale 

Page 10 of 47 

Permit No. SC0004278 

Calculating Freshwater Dissolved Metals Criteria that are Hardness-Dependent". The following 

equations and constants will be used to calculate aquatic life metals limits based on the Federal 

Register data. The water quality standard for these metals (CCC or CMC) will also be adjusted 

using this approach in accordance with Regulation 61-68.E.14.d(3) for evaluation of ambient 

water quality. 

K,,„ 

a 

C, 

C, 

S 

Effluent Total Suspended Solids (TSS) concentration in mg/I from actual or proposed 

monthly average permit limits. 

Background or in-stream Total Suspended Solids (TSS) concentration. The background 

TSS is assumed to be 1 mg/1 in the absence of actual instream data based on the 5th 

percentile of ambient TSS data on South Carolina waterbodies from 1993-2000. 

Average in-stream (mixed) TSS concentration. 

Conversion factor considered most relevant in fresh water for aquatic life as defined by 

EPA in dissolved metals documents for each listed metal 

Hardness in mg/1 of CaCO3. Per R.61-68.E.14.a(3), the CMC and CCC are based on a 

hardness of 25 mg/1 if the ambient hardness is less than 25 mg/l. Concentrations of 

hardness less than 400 mg/1 may be based on the actual mixed stream hardness if it is 

greater than 25 mg/1 and less than 400 mg/1 and 400 mg/1 if the ambient hardness is 

greater than 403 mg/I. The background hardness is assumed to be 25 mg/I in the absence 

of actual stream data. Mixed stream hardness may be determined using effluent hardness 

and actual stream hardness. 

Metal-specific equilibrium constant 

Metal-specific constant 

Linear partition coefficient 

Linear partition coefficient for use in the derivation of an adjusted water quality standard 

Dissolved phase metal concentration 

Total metal concentration 

a constant to represent the CCC or CMC 

TSS, 

TSS, 

TSS,„, 

CF 

H 

The following table lists the values for the constants, the CCC and CMC, and the recommended values of 

the conversion factors (CF). 

Table A 

Parameter kpo a CMC CFcmc CCC CFccc 

(pg/1) 01W1) 

Arsenic 0.48 x 106 -0.7286 340 100 150 100 

Cadmium 4.00 x 106 -1.1307 0.53* 100* 0.10* 96.7* 

Chromium+3 3.36 x 106 -0.9304 580* 31.6 28* 86 

Chromium+6 3.36 x 106 -0.9304 16 98.2 11 96.2 

Copper 1.04 x 106 -0.7436 3.8* 96 2.9* 96 

Lead 0.31 x 106 -0.1856 14* 99.3* 0.54* 99.3* 

Mercury 2.91 x 106 -1.1356 1.6 85 0.91 85 

Nickel 0.49 x 106 -0.5719 150* 99.8 16* 99.7 

Zinc 1.25 x 106 -0.7038 37* 97.8 37* 98.6 

* The equations for calculating the CCC, CMC, and conversion factors are gven in the Appendix to Regulation 

61-68 and Attachments 1 and 2 for each parameter. The values given for the CMC and CCC and CF in the 

table are based on 25 milligrams/liter (mg/1) hardness (as expressed as CaCO3). 

From Technical Guidance Manual for Performing Waste Load Allocations Book II. Rivers 

11l - l

Rationale

Page 10 of 47

Permit No. SC0004278

Calculating Freshwater Dissolved Metals Criteria that are Hardness-Dependent". The following

equations and constants will be used to calculate aquatic life metals limits based on the Federal

Register data. The water quality standard for these metals (CCC or CMC) will also be adjusted

using this approach in accordance with Regulation 61-68.E.14.d(3) for evaluation of ambient

water quality.

TSS, Effluent Total Suspended Solids (TSS) concentration in mg/I from actual or proposed

monthly average permit limits.

TSSb Background or in-stream Total Suspended Solids (TSS) concentration. The background

TSS is assumed to be I mg/I in the absence of actual instream data based on the 5th

percentile of ambient TSS data on South Carolina waterbodies from 1993-2000.

TSS., Average in-stream (mixed) TSS concentration.

CF Conversion factor considered most relevant in fresh water for aquatic life as defined by

EPA in dissolved metals documents for each listed metal

H Hardness in mg/I of CaCO3. Per R.61-68.E.14.a(3), the CMC and CCC are based on a

hardness of 25 mg/I if the ambient hardness is less than 25 mg/I. Concentrations of

hardness less than 400 mg/I may be based on the actual mixed stream hardness if it is

greater than 25 mg/I and less than 400 mg/I and 400 mg/I if the ambient hardness is

greater than 403 mg/I. The background hardness is assumed to be 25 mg/I in the absence

of actual stream data. Mixed stream hardness may be determined using effluent hardness

and actual stream hardness.

K,,, Metal-specific equilibrium constant

a Metal-specific constant

K, Linear partition coefficient

K,6 Linear partition coefficient for use in the derivation of an adjusted water quality standard

C, Dissolved phase metal concentration

C, Total metal concentration

S a constant to represent the CCC or CMC

The following table lists the values for the constants, the CCC and CMC, and the recommended values of

the conversion factors (CF).

Table A

Parameter kp a CMC CFcmc CCC CFccc

I (pg/) I(pg/I) I

Arsenic 0.48 x 106 -0.7286 340 100 150 100

Cadmium 4.00 x 106 -1.1307 0.53* 100* 0.10* 96.7*

mChromiumn+3 3.36x 106 -0.9304 580* 31.6 28* 86

Chromium+6 3.36 x 106 -0.9304 16 98.2 11 96.2

Copper 1.04 x 106 -0.7436 3.8* 96 2.9* 96

Lead 0.31 x 106 -0.1856 14* 99.3* 0.54* 99.3*

Mercury 2.91 x 106 -1.1356 1.6 85 0.91 85

Nickel 0.49 x 106 -0.5719 150* 99.8 16* 99.7

Zinc 1.25 x 106 -0.7038 37* 97.8 37* 98.6

* The equations for calculating the CCC, CMC, and conversion factors are given in the Appendix to Regulation

61-68 and Attachments land 2 for each parameter. The values given for the CMC and CCC and CF in the

table are based on 25 milligrarns/liter (mg/i) hardness (as expressed as CaCO3).

From Technical Guidance Manual for Performing Waste Load Allocations Book II. Rivers
Rationale 

Page 11 of 47 

Permit No. SC0004278 

and Streams,EPA/440/484/022: 

S = CCC or CMC 

.) 

Cd =SxCF 

" To determine the adjusted water quality standard (WQS,,,), use S and the equation for Cd 

above and the following equations: . 

K pb=K x (TSS,,)° 

WQS„, = Cd x {1+ xTSS6 x 19-6 )) 

To determine the effluent limit (C,,of ) , use S and the equation for Cd above and the 

following equations: • • 

(01 x TSS,)+{.Q700 xTSS 

TSS, — • 

Qd Q7Q10 

KD =Kr,x(TSS )° 

C, = Cd X {1+ C pX TS'S X 10-6N 

Once C, has been calculated, it is multiplied by DF, and background concentrations are 

accounted for to obtain the monthly average derived limit (C.00): 

C‘,00=(C1 x DF )7 {CI, 

(Q700)1 

Qd 

4. For all other parameters not included in paragraph 3, Table A, monthly average derived limits 

Waive) for aquatic life protection are calculated as follows: 

(127 Q101 Cogo= (DP"; X WQS 1 )7 CbX • Qd 

ii. Determine derived limit for protection of Human Health 

1. The following guidelines apply to determining human health limits: 

a. The human health criterion given by Regulation 61-68 will be applied as a monthly 

average derived limit after consideration of dilution and background concentrations (Cm.-

,). Exceptions exist based on EPA criteria and are indicated for specific parameters. No 

limits on human health based on water and organism consumption or drinking water 

MCLs will be imposed if there is no potential to affect a drinking water intake or source 

Rationale

. .- : Page. I of 47

Permit No. SC0004278

and Streams, EPA/440/484/022:

S =CCC or CMC .

Cd =Sx CF

To determine the adjusted water quality standard (WQSd,), use S and the equation for Cd

above and the following equations:

KPb = Kpo X (TSS 6 )C

WQS., = Cd X + (Kob x TSSb x10 )}

To determine the effluent limit (C.,h), use S and the equation for Cd above and the

following equations:

( QxTSSO )+(Q+ 7QIO XTSSb)

TSS,. = X

Qd + Q7Q910

C= Cd X {1 + (KP XT SSf x10-)'

Once C, has been calculated, it is multiplied by DF, and background concentrations are

accounted for to obtain the monthly average derived limit (Coqyi,):

CC' Q7

4. For all other parameters not included in paragraph 3, Table A, monthly average derived limits

(Citjf,) for aquatic life protection are calculated as follows:

C * *;(DFxWQS.)..C... -C. ..

.k Qd

ii. Determine derived limit for protection of Human Health

1. The following guidelines apply to determining human health limits:

a. The' human health criterion given by Regulation 61-68 will be applied as a monthly

average derived limit after consideration of dilution and background concentrations (CHN.-

,,,). Exceptions exist based on EPA criteria and are indicated for specific parameters. No

limits on human health based on water and organism consumption or drinking water

MCLs will be imposed if there is no potential to affect a drinking water intake or source
Rationale 

Page 12 of 47: 

Permit NO. SC0004278 

water protection area (i.e., if there is no intake downstream of the discharge). 

b. The daily maximum permit limit will be determined from the monthly average value from 

(a) above and a multiplier (M) determined using a statistical procedure recommended in 

Section 5.5 using average = 95th percentile from Table 5-3 in the TSD. The permitted or 

proposed number of samples per month (n) is used with the coefficient of variation (CV) 

to determine M. CV is assumed to be 0.6 as a default value if information is not known. 

Z

^

a--0.50 2 ) 

M 

z

•

a-0.517

'

2) 

where: 

2 

17n2=1n CV (— +1 

n 

Q 2= 14CV2+1) 

CV = coefficient of variation of the effluent concentration — 

Std. Deviation 

Mean 

n = the number of effluent samples per month (where frequency is less than 

1/month, n =1) 

z., = the percentile exceedance probability for the daily maximum permit limit 

(=2.326 for 99thpercentile basis) 

= the percentile exceedance probability for the monthly average permit limit 

(=1.645 for 95thpercentile basis) 

CHH-mar = M * (21111-ai 

2. Consider the background concentration (Cb) of the parameter of concern. If the background 

concentration is equal to or greater than the applicable standard (WQS, as defined above) for the 

parameter of concern, then the derived concentration limit (CHH.) for that parameter and for the 

protectiOn of that standard, is established equal to the standard (WQS). An exception exists where 

the naturally occurring instream concentration for a substance is higher than the derived permit 

effluent limitation. In those situations, the Department may establish permit effluent limitations 

(Cdai.,) at a level higher than the derived limit, but no higher than the natural background 

concentration. In such cases, the Department may require biological instream monitoring and/or 

whole effluent toxicity (WET) testing (See R.61-68.E.14.c(3)). 

If Cb is not based on naturally occurring concentrations and 

C b WQS 

Then, generally, 

CHH= WQS . 

If Cb is based on naturally occurring concentrations and 

C bZ WQS 

Then, generally, 

C HH < C eff lim < C b • 

_ Il -- - U -

Rationale

Page 12 of 47

Permit No. SC0004278

water protection area (i.e., if there is no intake downstream of the discharge).

b. The daily maximum permit limit will be determined from the monthly average value from

(a) above and a multiplier (M) determined using a statistical procedure recommended in

Section 5.5 using average = 95" percentile from Table 5-3 in the TSD. The permitted or

proposed number of samples per month (n) is used with the coefficient of variation (CV)

to determine M. CV is assumed to be 0.6 as a default value if information is not known.

eZ (u~-O.5 2)

M Z,,e-0.5ar )

where:

2 =n(CV2 + I

a' 2= In(CV2 + 1)

CV = coefficient of variation of the effluent concentration = Mean

n = the number of effluent samples per month (where frequency is less than

I/month, n =1)

z. = the percentile exceedance probability for the daily maximum permit limit

(=2.326 for 99h percentile basis)

z. = the percentile exceedance probability for the monthly average permit limit

(=1.645 for 95" percentile basis)

CH..^, = M * CHH.,

2. Consider the background concentration (Cb) of the parameter of concern. If the background

concentration is equal to or greater than the applicable standard (WQS, as defined above) for the

parameter of concern, then the derived concentration limit (CH,) for that parameter and for the

protection of that standard, is established equal to the standard (WQS). An exception exists where

the naturally occurring instream concentration for a substance is higher than the derived permit

effluent limitation. In those situations, the Department may establish permit effluent limitations

(Cej.) at a level higher than the derived limit, but no higher than the natural background

concentration. In such cases, the Department may require biological instream monitoring and/or

whole effluent toxicity (WET) testing (See R.61-68.E.14.c(3)).

If Cb is not based on naturally occurring concentrations and

C b 2 WQS

Then, generally,

CHH = WQS.

If Cb is based on naturally occurring concentrations and

C b 2 WVQS

Then, generally,

CH < Ceff lim - Cb
Rationale 

Page 13 of 47 

Permit No. SC0004278 

Otherwise, the limits are established as described in Items 3-6 below. 

3. Human Health — Organism Consumption (C.O. 

a. For Carcinogens 

The Monthly Average is calculated as follows: 

Corg= (DF2 x WQS„ g ) — {C6 x (AliFd 

Qd 

b. For Non-carcinogens 

The Monthly Average is calculated as follows: 

= (DF x WQS ,„,g ) X( 2.2212-1 

Qd 

4. Human Health — Water and Organism Consumption (C.) • 

. , . • , , 

. For Carcinogens • 

The Monthly Average is calculated as follows: 

;4A F11 C„,,.= (DF, x WQS ,40, ) — Cb XH--} 

• ' Qd • 

b. For Non-carcinogens 

The Monthly Average is calculated as follows: 

Q7 Q101 = (N; xWaF — 

Q d • ' 

5. Human Health — Drinking Water 'M ixin•ium tontaMinant Level (MCL) r (C..d). 

, • , 

a. For Carcinogens 

The Monthly Merage is calculated as folloWs: ' 

b., For Non-carcinogens 

The Monthly Average is calculated as follows: 

Q7 Q1011; 

Qd. 

C„,d= (DF3 x WQS„,d )- 

6. Organoleptic criteria (C.). 

The Monthly Average is calculated as follows: 

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Page 13 of 47

Permit No. SC0004278

Otherwise, the limits are established as described in Items 3-6 below.

3. Human Health - Organism Consumption (C.,).

a. For Carcinogens

The Monthly Average is calculated as follows:

Corg = (DF2 X WQSo )-{Cb X (AF )

* b. For Non-carcinogens - -

The Monthly Average is calculated as follows:

Crg = (DFE x WQSorg) -{Cbx(i)}

4. Human Health - Water and 'Organism Consumption (C.)

a. 'For Carcinogens

The Monthly Average is calculated as follows:

C.,o (DF4 XWQS ~)-{Cb X()}

b. For Non-carcinogens

The Monthly Average is calculated as follows:

Cb =(DF3 XWQS) -Q{CbX( 7QIJ}

5. Human Health - Drinking Water Maximum Contaminant Level (MCL) (Cd).

a. For Carcinogens ,

The Monthly Average is calculated as folows:"

CMCI= (D 4 X WQSe't)-{Cb( 

{ 

X 

Qd 

A 1J

)

b., ForNon-carcinogens

The Monthly Average is calculated as follows:

= (DF3 x WQS ) {Cbx(Q'J}

6. Organoleptic criteria (C.,).

The Monthly Average is calculated as follows:
Rationale 

Page 14 of 47 

Permit No. SC0004278 

Qd 

c. Determine most stringent of applicable data using the monthly average derived limits determined or 

calculated above: 

= minimum of (Cor;, Co.„ CgC.4) 

Note: If a CMC is present for the parameter of concern, the daily maximum derived limit obtained 

from that calculation must also be considered under reasonable potential. 

d. Determine whether the discharge causes, has the reasonable potential to cause or contributes to a water 

quality violation. 

Regulation 61-9.122.44(d)(1Xi) states: "Limitations must control all pollutants or pollutant parameters 

(either conventional, nonconventionai, or toxic pollutants) which the Department determines are or may be 

discharged at a level which will cause, have the reasonable potential to cause, or contribute to an excursion 

above any State water quality standard, including State narrative criteria for water quality." 

When determining whether a discharge causes, has the reasonable potential to cause or contributes to an 

instream excursion, the Department will use procedures which account for controls on point and nonpoint 

sources of pollution, the variability of the pollutant in the effluent, the sensitivity of the species to toxicity 

testing (when evaluating whole effluent toxicity), and, where appropriate, the dilution of the effluent in the 

receiving water (R.61-9.122.44(d)(1)(ii)). 

Based on the above statements, there are three scenarios when limitations are required, as follows: 

i. When data provided by the permit applicant indicates values greater than the proposed limitation 

derived above, that discharge will cause an excursion above a narrative or numeric water quality 

criterion. 

ii. A discharge will be determined to contribute to an excursion of a water quality criterion when the 

waterbody is impaired (e.g., on the 30303.1ist) for the parameter of concern and that parameter is also 

being discharged at levels abOve the water quality criterion. 

iii. Reasonable potential to cause a water quality violation is determined using the following information: 

Chapter 3 of the TSD provides information for determining the need for permit limits based on the 

regulatory statements above. A statistical procedure is also presented in Chapter 3 for use in 

determining reasonable potential from effluent data. Other statistical methods may be used as well to 

evaluate data sets. "National Guidance for the Permitting, Monitoring, and Enforcement of Water 

Quality-Based Effluent Limitations Set Below Analytical Detection/Quantitation Level" draft dated 

March 22, 1994, offers recommendations on how to interpret data below detection capabilities to make 

a reasonable potential analysis. 

All pollutants given in a wasteload allocation or an effluent limitation guideline will be limited in the 

permit. 

Co= (DF2 x WQL o )—{Cb 

11 ! H

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- - Page 14 of 47

Permit No. SC0004278

C., =(DF2X WQS. 1) {Cb X(AA J} i (Qd )

c. Determine most stringent of applicable data using the monthly average derived limits determined or

calculated above:

C," = minimum of (C,,,,,, CO., C-l, Cd,, Ci Cl.)

Note: If a CMC is present for the parameter of concern, the daily maximum derived limit obtained

from that calculation must also be considered under reasonable potential.

d. Determine whether the discharge causes, has the reasonable potential to cause or contributes to a water

quality violation.

Regulation 61-9.122.44(d)(1Xi) states: "Limitations must control all pollutants or pollutant parameters

(either conventional, nonconventional, or toxic pollutants) which the Department determines are or may be

discharged at a level which will cause, have the reasonable potential to cause, or contribute to an excursion

above any State water quality standard, including State narrative criteria for water quality."

When determining whether a discharge causes, has the reasonable potential to cause or contributes to an

instream excursion, the Department will use procedures which account for controls on point and nonpoint

sources of pollution, the variability of the pollutant in the effluent, the sensitivity of the species to toxicity

testing (when evaluating whole effluent toxicity), and, where appropriate, the dilution of the effluent in the

receiving water (R.61-9.1 22.44(d)(1)(ii)).

Based on the above statements, there are three scenarios when limitations are required, as follows:

i. When data provided by the permit applicant indicates values greater than the proposed limitation

derived above, that discharge will cause an excursion above a narrative or numeric water quality

criterion.

ii. A discharge will be determined to contribute to an excursion of a water quality criterion when the

waterbody is impaired (e.g., on the 303(d) list) for the parameter of concern and that parameter is also

being discharged at levels above the water quality criterion.

iii. Reasonable potential to cause a water quality violation is determined using the following information:

Chapter 3 of the TSD provides information for determining the need for permit limits based on the

regulatory statements above. A statistical procedure is also presented in Chapter 3 for use in

determining reasonable potential from effluent data. Other statistical methods may be used as well to

evaluate data sets. "National Guidance for the Permitting, Monitoring, and Enforcement of Water

Quality-Based Effluent Limitations Set Below Analytical Detection/Quantitation Level" draft dated

March 22, 1994, offers recommendations on how to interpret data below detection capabilities to make

a reasonable potential analysis.

All pollutants given in a wasteload allocation or an effluent limitation guideline will be limited in the

permit.
Rationale 

Page 15 of 47 

Permit No. SC0004278 

When effluent data consists of non-quantifiable/non-detectable values or when no effluent data is . 

available, other factors and information are considered to determine reasonable potential. In situations 

where a pollutant is knoWn to be-present in 'the wastestream (due' to production data or other 

information), we know it is being discharged arid has the potential to impact even though it may not be 

quantifiable. The fact that it is present will be enough information to say reasonable potential exists for 

that pollutant. Therefore, a reasonable potential decision is based on various data and information, and 

not just non-quantifiable/non-detectable data. Consideration is given to existing data,. dilution in the 

waterbody, type of receiving water, designated use, type 'of industry/wastestream, ambient data, history 

of compliance, and history of toxic impact., If any source of information indicates reasonable potential 

to cause or contribute to an exceedance of the water quality standard, a water quality limit will be 

developed. 

Note: The result of the following calculations may indicite that reasonable potential does not 

exist. However, as stated above, other information may "override" this numerical 

determination to justify the need for a limit. 

1. The procedure for determining reasonable potential from actual effluent data is explained in Box 

3-2 on page 53 of the TSD. Multiplying factors are determined from Table 3-2 at a 95% 

confidence level and 95% probability in Section 3.3.2. The following 'describes the procedures 

used for determining- reasonable potential for chemical-specific parameters and WET, under 

certain circumstances. More information on determining reasonable potential for WET is given in 

Item 2 below. 

. 

Step 1: Data Analysis: The statistical calculations involved in the "Reasonable Potential" analysis 

require discrete numerical data. The following describes how the effluent data will be used in 

determining reasonable potential. 

Actual analytical results should be used whenever possible. Results less than detection and 

quantification should be used as follows: 

• - 

. . 

a. If the permittee reports results below the Practical .quantitation limit (PQL) (as defined by 

the permit), then the reported "less than PQL" value for d'given sample is generally 

assumed to be zero. 

• , • 

b.. If the permittee uses a deteetion/quantification level that is greater than the PQL, then the 

reported "lesi than" value for a given sample- is generally assumed to be a discrete value 

equal to the detection/quantification level used by the permittee. 

c. If the reported data consists-of both 'discrete and non-discrete values 'and/or the data is 

reported using varying detection/quantification levels, then, generally, a combination of 

the above two approaches is used, or the data is evaluated in a manner that is most 

appropriate for that data set 

Note: For information on the acceptable analytical methods and PQLs please refer to 

NPDES permit aPplication-attachment titled "Practical Quantitation Limits (PQL) and 

Approved Test Methods." : ' 

Step 2: Using data from the pennit application, other data supplied by the applicant and/or Discharge 

Monitoring Report (DMR) data, determine the total number of observations (n) for a particular 

set of effluent data and determine the highest value (C...) from that' data set. For the monthly 

Rationale

Page 15 of 47

Permit No. SC0004278

When effluent data consists of non-quantifiable/non-detectable values or when no effluent data is

available, other factors and information are considered to determine reasonable potential. In situations

where a pollutant is known to be present in'the wastestreani (due to production data or other

information), we know it is being discharged and has the potential to impact even though it may not be

quantifiable. The fact that it is present will be'enough information to say reasonable potential exists for

that pollutant. Therefore, a reasonable potential decision is based on various data and infornation, and

not just non-quantifiable/non-detectable data. Consideration is given to existing data, dilution in the

waterbody, type of receiving water, designated use, type of industry/wastestream, ambient data, history

of compliance, and history of toxic impact. If any source of information indicates reasonable potential

to cause or contribute to an exceedance of the water quality standard, a water quality limit will be

developed.

Note: The result of the following calculations may indicate that reasonable potential does not

exist. However, as stated above, other information may "override" this numerical

determination to justify the need for a limit.

1. The procedure for determining reasonable potential from actual effluent data is explained in Box

3-2 on page 53 of the TSD. Multiplying factors' are determined from Table 3-2 at a 95%

confidence level and 95% probability in Section 3.3.2. The following describes the procedures

used for determining- reasonable potential for chemical-specific parameters and WET, under

certain circumstances. More information on determining reasonable potential for WET is given in

-Item 2 below.

Step l: Data Analysis: The statistical calculations involved in' the "Reasonable Potential" analysis

require discrete numerical data. The following describes how the effluent data will be used in

determining reasonable potential.

Actual analytical results should be used whenever possible. Results less than detection and

quantification should be used as follows:

a. If the permittee reports results below the practical quantitation limit (PQL) (as defined by

the permit), then the reported "less than PQL" value 'for a given sample is generally

assumed to be zero.

b.' If the pernittee uses a detectioi/quantification level that is greater than the PQL, then the

reported "less than" value for a given sample'is generally assumed to be a discrete value

equal to the detection/quantification level used by the permittee.

c. If the reported data consists'of both 'discrete and non-discrete values and/or the data is

reported using varying detection/quantification levels, then, generally, a combination of

the above two approaches is used, or the data is evaluated in a manner that is most

appropriate for that data set.

Note: For information on the acceptable analytical methods and PQLs please refer to

-NPDES permit application attachment titled "Practical Quantitation Limits (PQL) and

Approved Test Methods."

Step 2: Using data from the permit'application, other data supplied by the applicant and/or Discharge

Monitoring Report'(DMR) data, determine the total number of observations (n) for a particular

set of effluent data and determine the highest value (C.) from that'data set. For the monthly
Rationale 

Page 16 of 47 

Permit No. SC0004278 

average comparison, the data set will include monthly average results and n will be the number 

of months in which they sampled in the time period being evaluated. When there is also a 

daily maximum comparison, the data set will include daily maximum results and n will be the 

total number of samples in the time period being evaluated. Iwili3.4dual.results may not 

necessarily be used in the calculation. 

Step 3: Determine the coefficient of variation (CV) for the data set. For a data set where n>10, the CV 

is calculated as standard deviation divided by mean for the data set being evaluated. For data 

set where n<10, the CV is estimated to equal 0.6. For less than 10 items of data, the 

uncertainty in the CV is too large to calculate a standard deviation or mean with sufficient 

confidence. 

CV =0.6 for n <10 

CV =•-L for (: n > 10 

where: or = Standard Deviation of the samples 

p = Mean of the samples 

Step 4: Determine the appropriate multiplying factor (MF) from either Table 3-2 or using the formulae 

in Section 3.3.2 of the TSD. 

a. Determine the percentile represented by the highest concentration in the sample data. 

p„ = (1— Confidence Level)"" 

where: p. = Percentile represented by the highest concentration in the data 

n = number of samples 

Confidence Level = 0.95 i.e. 95% 

b. Determine the multiplying factor (MF), which is the relationship between the percentile 

described above (Cp) and the selected upper bound of the lognormal effluent distribution, 

which in this case will be the 95thpercentile (Cps). 

C e

(Z,5a+0.5a3) 

MF 95 = 

Co ecz,,,,o3a2) 

where: Z,, is the standardized Z-score for the 95thpercentile of the standardized 

normal distribution = 1.645 

Zp is the standardized Z-score for the pm percentile of the standardized normal 

distribution.(determined in (b) above) 

Note: The values of Z-scores are listed in tables for the normal distribution. If using 

Microsoft® Excel, this can be calculated using the NORMSINV function. 

62 = ln(CV2 + 1) 

II _ :

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Page 16 of 47

Permit No. SC0004278

average comparison, the data set will include monthly average results and n will be the number

of months in which they sampled in the time period being evaluated. When there is also a

daily maximum comparison, the data set will include daily maximum results and n will be the

total number of samples in the time period being evaluated. Ian4ad results may not

necessarily be used in the calculation.

Step 3: Determine the coefficient of variation (CV) for the data set. For a data set where n>10, the CV

is calculated as standard deviation divided by mean for the data set being evaluated. For data

set where n<10, the CV is estimated to equal 0.6. For less than 10 items of data, the

uncertainty in the CV is too large to calculate a standard deviation or mean with sufficient

confidence.

CV=0.6 for n<10

CV=- 1 for n>l0

where: a- = Standard Deviation of the samples

,u = Mean of the samples

Step 4: Determine the appropriate multiplying factor (MF) from either Table 3-2 or using the formulae

in Section 3.3.2 of the TSD.

a. Determine the percentile represented by the highest concentration in the sample data.

pn = (I - Confidence Level)|"

where: p. Percentile represented by the highest concentration in the data

n = number of samples

Confidence Level = 0.95 i.e. 95%

b. Determine the multiplying factor (MF), which is the relationship between the percentile

described above (C,) and the selected upper bound of the lognormal effluent distribution,

which in this case will be the 95th percentile (C,,).

C9 e(Z95s¢+0.502) MF- 95

CO e(Zae+O.5a2 )

where: Z,, is the standardized Z-score for the 95h percentile of the standardized

normal distribution = 1.645

Z, is the standardized Z-score for the p^ percentile of the standardized normal

distribution.(determined in (b) above)

Note: The values of Z-scores are listed in tables for the normal distribution. If using

AMicrosoft® Excel, this can be calculated using the NORMSlNVfunction.

a' = In(CV2 + 1)
Rationale 

Page 17 of 47 

Permit No. SC0004278 

a = •11n(CV2+1) 

Step 5: Multiply the highest value frorithe data sef(C...) by the multiplying factor (MF) determined 

in Step 4 to obtain the maximum receiving water concentration (RWC). 

RWC = Cox x MF 

Step 6: RWC 5 Derived monthly average limit (Co„,) implies that a reasonable potential does not 

Sexist. 

RWC > Derived monthly average limit (Ce.,.,) implies that a reasonable potential exists. 

Note: If a CMC is available for a given parameter, the daily maximum value will be used in 

addition to the monthly average for a determination of reasonable potential. 

2. Reasonable potential for WET may be determined from numerical ciata using one of the following 

procedures: 

a. When the effluent data is given in terms of percent effluent as LCsoand/or NOEC values: 

Step 1: Convert the given LC50 and NOEC values to toxic units, . TU. for acute data and TU, for 

chronic data, respectively, using the following formulae: 

TU 100 — 

aLC50 

100 

— NOEC 

Step 2: Using DMR data or other data provided by the applicant, determine the total number of 

observations (n) for a particular set of effluent data and determine the highest value (714, 

ma,, or TU,, max) from that data set. • • 

Step 3: Determine the coefficient of variation (CV) for the data set. For a data set where n>10, the 

CV is calculated as standard deViation divided by mean. For data set where n<10, the CV 

is estimated to equal 0.6. For less than 10 items of data, the uncertainty in the CV is too 

large to calculate a standard deviation or mean with sufficient confidence. 

Step 4: Determine the appropriate multiplying factor (MF) from either Table 3-2 or using the 

formulae in Section 3.3.2. (see iii.1, Step 4 above). 

Step 5: Multiply the highest value of TU,, rim or TUE, max from the data set by the multiplying factor 

(MP) determined in Step 4 and the dilution at the edge of the mixing zone (the test 

'concentration obtained from mixing zone modeling or demonstration) to obtain the 

• maximum receiving water concentration (RWC) 

RWC for Acute Toxicity = MF * conc. at MZ boundary] 

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Page 17 of 47

Permit No. SC0004278

a = ln(CV2 +1)

Step 5: Multiply the highest value from the data set'(Cog) by the multiplying factor (MF) determined

in Step 4 to obtain the maximum receiving water concentration (RWC).

RWC Cux MF

Step 6: RWC < Derived monthly average limit (Co) implies that a reasonable potential does not

'exist.

RWC > Derived monthly average limit (Cp.) implies that a reasonable potential exists.

Note: If a CMC is available for a given parameter, the daily maximum value will be used in

addition to the monthly average for a determination of reasonable potential.

2. Reasonable potential for WET may be determined from numerical data using one of the following

procedures:

a. When the effluent data is given in terms of percent effluent as LC50 and/or NOEC values:

Step 1: Convert the given LC., and NOEC values to toxic units, UV. for acute data and TU, for

chronic data, respectively, using the following formulae:

TU. 100 eU=LC5

'U~= '100

NOEC

Step 2: Using DMR data or other data provided by the applicant, determine the total number of

observations (n) for a'particular set of effluent data and determine the highest value (TUA,,

Ox or TUE, tax) from that data set.

Step 3: Determine the coefficient of variation (CV) for the data set. For a data set where n>l0, the

CV is calculated as standard deviation divided by mean. For data set where n<10, the CV

is estimated to equal 0.6. For less than 10 items of data, the uncertainty in the CV is too

large to calculate a standard deviation or mean with sufficient confidence.

Step 4: Determine the appropriate multiplying factor (MF) from either Table 3-2 or using the

formulae in Section 3.3.2. (see iii.l, Step 4 above).

Step 5: Multiply the highest value of Q ., or TUV, from the data set by the multiplying factor

(MF) determined in Step 4 and the dilution at the edge of the mixing zone (the test

concentration obtained from mixing zone modeling or demonstration) to obtain the

maximum receiving water concentration (RWC)

R f'C 'for Acute Toxicity = [TU., * MF * conc. at MZ bounday]
Rationale 

Page 18 of 47 

Permit No. SC0004278 

RWC for Chronic Toxicity = * MF * conc. at MZ boundary] 

Step 6: RWC for Acute Toxicity < 0.3TU. implies that a reasonable potential does not exist 

RWC for Acute Toxicity > 0.3TU. implies that a reasonable potential exists 

RWC for Chronic Toxicity < 1.0TU, implies that a reasonable potential does not exist 

RWC for Chronic Toxicity >1.0TU, implies that a reasonable potential exists 

b. When pass/fail effluent data only is available and all tests have passed, the Department may be 

able to determine reasonable potential in a manner similar to Item 1 above assuming the test 

concentration of interest is greater than or equal to the concentration at which the permittee 

has tested. If the permittee has not tested at or above the test concentration of interest, the 

Department cannot say that reasonable potential does not exist, unless perhaps, circumstances 

related to the discharge have changed. If any failures exist in the data set that cannot be 

removed, reasonable potential may be determined to exist. 

c. Other methods for determining reasonable potential may be used if appropriately justified. 

e. Determine permit limits based on water quality data 

i. When the discharge is determined to cause or have the reasonable potential to cause a water quality 

violation for a particular parameter, except WET, limits are needed. Limits are typically based on the 

monthly average values calculated from G.2.c above. However, daily maximum values may be 

evaluated under reasonable potential under certain circumstances. If reasonable potential exists for 

either average or maximum derived limits, limits on both are needed per Regulation 61-9.122.45(d). 

1. If the monthly average from G.2.c is based on a wasteload allocation for oxygen-demanding 

pollutants and nutrients and 

a. no CMC exists, the water quality limits are 

monthly average = C.. 

daily maximum = 2 x 

b. a CMC exists (for ammonia), the water quality limits are 

monthly average = C. 

and the daily maximum is the most stringent of 

daily maximum = 2 x 

Or 

daily maximum = CMC as WQS in G.2.b.i.3 or 4 

2. If the monthly average from G.2.c is based on aquatic life data given as a CCC, if the discharge 

causes, has the reasonable potential to cause or contributes to a water quality violation based on 

the monthly average and a CMC also exists for the parameter, the water quality limits are 

monthly average = CCC as WQS in G.2.b.i.3 or 4 

daily maximum = using CMC as WQS in G.2.b.i.3 or 4 

3. If the monthly average from G.2.c is based on aquatic life data given as a CCC and if the discharge 

11 11

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Page 18 of 47

Permit No. SC0004278

RWC for Chronic Toxicity = [TU, Frir * MF * conc. at MZ boundary]

Step 6: RWC for Acute Toxicity < 0.3TU. implies that a reasonable potential does not exist

RWC for Acute Toxicity > 0.3TU, implies that a reasonable potential exists

RWC for Chronic Toxicity < 1.0TU, implies that a reasonable potential does not exist

R WC for Chronic Toxicity >.OTU0, implies that a reasonable potential exists

b. When pass/fail effluent data only is available and all tests have passed, the Department may be

able to determine reasonable potential in a manner similar to Item 1 above assuming the test

concentration of interest is greater than or equal to the concentration at which the permittee

has tested. If the permittee has not tested at or above the test concentration of interest, the

Department cannot say that reasonable potential does not exist, unless perhaps, circumstances

related to the discharge have changed. If any failures exist in the data set that cannot be

removed, reasonable potential may be determined to exist.

c. Other methods for determining reasonable potential may be used if appropriately justified.

e. Determine permit limits based on water quality data

i. When the discharge is determined to cause or have the reasonable potential to cause a water quality

violation for a particular parameter, except WET, limits are needed. Limits are typically based on the

monthly average values calculated from G.2.c above. However, daily maximum values may be

evaluated under reasonable potential under certain circumstances. If reasonable potential exists for

either average or maximum derived limits, limits on both are needed per Regulation 61-9.122.45(d).

1. If the monthly average from G.2.c is based on a wasteload allocation for oxygen-demanding

pollutants and nutrients and

a. no CMC exists, the water quality limits are

monthly average = C.

daily maximum = 2 x C..

b. a CMC exists (for ammonia), the water quality limits are

monthly average = C.

and the daily maximum is the most stringent of

daily maximum = 2 x C.

or

daily maximum = C,,,,,,using CMC as WQS in G.2.b.i.3 or 4

2. If the monthly average from G.2.c is based on aquatic life data given as a CCC, if the discharge

causes, has the reasonable potential to cause or contributes to a water quality violation based on

the monthly average and a CMC also exists for the parameter, the water quality limits are

monthly average = C,,v,.using CCC as WQS in G.2.b.i.3 or 4

daily maximum = C, using CMC as WQS in G.2.b.i.3 or 4

3. If the monthly average from G.2.c is based on aquatic life data given as a CCC and if the discharge
Rationale 

Page 19 of 47 

Permit No. SC0004278 

does not cause, have the reasonable potential to cause or contribute to a water quality violation for 

that monthly average, but a CMC also exists for the parameter and the discharge causes, has the 

reasonable potential to cause or contributes to a water quality violation based on that daily 

maximum, the water quality limits are 

monthly average = Caw...using CCC as WQS in G.2.b.i.3 or 4 

daily maximum = CMC as WQS in G.2.b.i.3 or 4 

If the monthly 

and 

from G.2.c is based on aquatic life data given as a CCC or other acute or 

chronic data and no CMC exists for the parameter, thewater quality limits are 

monthly average = • • 

daily maximum = 2 x • 

5. If no CMC exists and the monthly average from G.2.c is based on human health (organism, w/o, 

MCL) data, the water quality limits are 

monthly average = - 

daily maximum = M x C„„ using the calculation for M from G.2.b.ii.1.b 

6. If a CMC exists and the monthly average from alc is based on human health (organism, w/o, 

MCL) data, the water quality limits will be 

monthly average = C„,, 

and the daily maximum will be the most stringent of 

daily maximum = M x CNA using the calculation for M from G.2.b.ii.l .b 

Or 

daily maximum = C.00.‘„using CMC as WQS; in G.2.b.i.3 or 4 

7. If no CMC exists and the monthly average ,from G.2.c is based on organoleptic data, the water 

quality limits are . 

. monthly average = C.,' 

daily miximum = M x C.; using the calculation for.M from G.2.b.ii.l .b 

8. If a CMC exists and .the monthly average from G.2.c is based on organoleptic data, the water 

quality limits will be 

monthly average = C., 

_ . 

and the daily maximum will be the most stringent of 

daily maximum = M x C., using the calculation for M from G.2.b.ii.l .b 

Or 

Rationale

Page 19 of 47

Permit No. SC0004278

does not cause, have the reasonable potential to cause or contribute to a water quality violation for

that monthly average, but a CMC also exists for the parameter and the discharge causes, has the

reasonable potential to cause or contributes to a water quality violation based on that daily

maximum, the water quality limits are

monthly average = C., using CCC as WQS in G.2.b.i.3 or 4

daily maximum = C,,using CMC as WQS in G.2.b.i.3 or 4

4. If the monthly average from G.2.c is based on aquatic life data given as a CCC or other acute or

chronic data and no CMC exists for the parameter, the-water quality limits are

monthly average = C,,v,

daily maximum = 2 x C-.

5. If no CMC exists and the monthly average from G.2.c is based on human health (organism, w/o,

MCL) data, the water quality limits are

monthly average = CHH

daily maximum = M x C.m using the calculation for M from G.2.b.ii. ILb

6. If a CMC exists and the monthly average from G.2.c is based on human health (organism, w/o,

MCL) data, the water quality limits will be

monthly average *-C

and the daily maximum will be the most stringent of

daily maximum M x C,. using the calculation for M from G.2.b.ii.l .b

or

daily maximum = C.,,,.using CMC as WQS in G.2.b.i.3 or 4

7. If no CMC exists and the monthly average.from G.2.c is based on organoleptic data, the water

quality limits are

monthly average = C, . -

daily maximum = M x C0, using the calculation forM from G.2.b.ii.l .b

8. If a CMC exists and .the monthly average from G.2.c is based on organoleptic data, the water

quality limits will be

monthly average C,

and the daily maximum will be the most stringent of

daily maximum = M x C., using the calculation for M from G.2.b.ii.l .b

or
Rationale 

Page 20 of 47 

Permit No. SC0004278 

- daily maximum = C.004..using CMC as WQS in G.2.b.i.3 or 4 

9. If only a CMC exists, then the water quality limits will be no monthly average and 

daily maximum = C,04.,using CMC as WQS in G.2.b.i.3 or 4 

ii. If the discharge is determined to cause or have the reasonable potential to cause a water quality 

violation for WET, permit limitations will be explained in the rationale for that parameter. 

iii. If the discharge is determined to contribute to an existing water quality violation, monthly average and 

daily maximum limits will be set giving no credit for dilution of the receiving water (end-of-pipe 

limits) based on the criteria in Item I above. 

f. Consider Effluent Limitations Guidelines (ELG or Categorical guidelines) 

The more stringent of the effluent limitations guidelines average and maximum derived limits and water 

quality-derived average and maximum limits determined in e above shall be used as permit limits, unless 

other information indicates more stringent limits are needed as indicated in Section H at the end of this 

section. Categorical limitations based on mass may first be converted to concentration using the long term 

average flow of the discharge for both the monthly average and daily maximum calculations, unless the 

applicable guidelines require use of an alternate flow. 

1. For Effluent guidelines based on production, limits will be calculated as follows: 

ELG lim = E (ELGprod)(ELG) where 

ELG1im: the mass limit, in lbs/day, for an applicable pollutant based on the production 

ELGprod: the production rate, in lbs, for the applicable guideline(s), usually based on long term 

average data 

ELG: the effluent guideline limitation, given as a measure of production (e.g. lbs/1000 lbs), for an 

applicable pollutant 

2. For Effluent guidelines based on flow, limits will be calculated as follows: 

ELG lim = E (ELGflow)(ELG)(8.34) where 

ELG1im :the mass limit, in lbs/day, for an applicable pollutant based on applicable flow 

ELGprod: the long term average flow rate, in MGD, for the applicable guideline(s) 

ELG: the concentration limitation, in mg/1, for an applicable pollutant from the applicable guideline(s) 

a. For BOD and TSS limits based on OCPSF Effluent Guidelines with two or more applicable 

subparts in subparts B-H , the limits will be calculated as follows: 

subpart production 

ELG = E( (ELG lim) where 

total OCPSF production 

ELGo: the final OCPSF limitation, in lbs/day 

ELG1im: the limitation, in lbs/day, determined from the calculation in item 2 above. 

H. Other considerations 

--ilRationale

Page 20 of 47

Permit No. SC0004278

daily maximum = C,,,, using CMC as WQS in G.2.b.i.3 or 4

9. If only a CMC exists, then the water quality limits will be no monthly average and

daily maximum = C,,,,,,using CMC as WQS in G.2.b.i.3 or 4

ii. If the discharge is determined to cause or have the reasonable potential to cause a water quality

violation for WET, permit limitations will be explained in the rationale for that parameter.

iii. If the discharge is determined to contribute to an existing water quality violation, monthly average and

daily maximum limits will be set giving no credit for dilution of the receiving water (end-of-pipe

limits) based on the criteria in Item I above.

f. Consider Effluent Limitations Guidelines (ELG or Categorical guidelines)

The more stringent of the effluent limitations guidelines average and maximum derived limits and water

quality-derived average and maximum limits determined in e above shall be used as permit limits, unless

other information indicates more stringent limits are needed as indicated in Section H at the end of this

section. Categorical limitations based on mass may first be converted to concentration using the long term

average flow of the discharge for both the monthly average and daily maximum calculations, unless the

applicable guidelines require use of an alternate flow.

I . For Effluent guidelines based on production, limits will be calculated as follows:

ELG lim = E (ELGprod)(ELG) where

ELGlim: the mass limit, in lbs/day, for an applicable pollutant based on the production

ELGprod: the production rate, in Ibs, for the applicable guideline(s), usually based on long term

average data

ELG: the effluent guideline limitation, given as a measure of production (e.g. Ibs/1000 Ibs), for an

applicable pollutant

2. For Effluent guidelines based on flow, limits will be calculated as follows:

ELG lim = j (ELGflow)(ELG)(8.34) where

ELGlim :the mass limit, in lbs/day, for an applicable pollutant based on applicable flow

ELGprod: the long term average flow rate, in MGD, for the applicable guideline(s)

ELG: the concentration limitation, in mg/l, for an applicable pollutant from the applicable guideline(s)

a. For BOD and TSS limits based on OCPSF Effluent Guidelines with two or more applicable

subparts in subparts B-H , the limits will be calculated as follows:

ELG 0 = ~( subpart production (ELG lim) where

total OCPSF production

ELG,: the final OCPSF limitation, in lbs/day

ELGlim: the limitation, in lbs/day, determined from the calculation in item 2 above.

H. Other considerations
Rationale 

Page 21 of 47 

Permit No. SC0004278 

1. When the derived permit effluent limitation based on aquatic life numeric criteria is below the practical 

quantitation limit for a substance, the derived perinit effluent limitation shall include an accompanying 

statement in the permit that the practical quantitation limit using approved analytical methods shall be , 

considered as being in compliance with the limit. Appropriate biological monitoring requirements shall be 

incorporated into the permit to determine compliance with appropriate water quality standards. (R.61- 

68.E.14.c(2)) : 

2. When the derived permit effluent limitation based on human health numeric criteria is below the practical 

quantitation limit for a substance, the derived permit 'effluent liniitation include an accompanying 

statement in the permit that the practical qUantitaiion 'using' approved analytical methods shall be 

considered as being in compliance with the limit (k.61-68.E.14.43)) - 

3. The effluent concentration limits determined 'above may not neCessarily be the NPDES permit limit. NPDES 

Perrnit limits are determined after a reasonable potential analysis is conducted using these derived limits and 

also after evaluating other issues (e.g. anti43acksliding, antidegradation): 

4. Mass limitations may be required in certain circumstincis.' When mass liniits 'are calculated the, formula to be 

used is as follows. 

Mass (lb/day) = Flow (mgd) *Concentration (mg/1) * 8.34 • 

5. Final Limitations will typically be rounded to two (2) signifiOant figures (based on EPA's policy 'with its 

national criteria) while consideiing the,PQL for 'a given parameter. Rounding will be perfornied using the 

following procedure (as recommended by the DHEC lab): 

a. If the digit of interest is even and the number following it is a five' (5), the digit of interest remains the 

same. 

b. If the digit of interest is odd and the number folloWing it is a five (5), the digit of interest is rounded up. 

c. If the digit of interest is even or odd and the limber following it is between 0 and 4, the digit of interest 

remains the same. 

d. If the digit of interest is even or odd and the number following 'it is betWeen-6 and 9, the digit of interest is 

rounded up. 

Rationale

' ' Page21 of 47

Permit No. SC0004278

1. When the derived permit effluent limitation based on aquatic life numeric criteria is below the practical

quantitation limit for a substance, the derived permit effluent limitation shall include an accompanying

statement in the permit that the practical quantitation limit using approved analytical methods shall be

considered as being in compliance with the limit. Appropriate biological monitoring requirements shall be

incorporated into the permit to determine compliance with appropriate water quality standards. (R.61 -

68.E.14.c(2))

2. When the derived permit effluent limitation based on human health numeric criteria is below the practical

quantitation limit for a substance, the derived permit effluent limitation shall include an accompanying

statement in the permit that the practical quantitation liit using approved analytical methods shall be

considered as being in compliance with the limit. (R.61-68.E.14.c(3)) -

3. The effluent concentration limits determined 'above'may not necessarily be the NPDES permit limit. NPDES

Permit limits are determined after a reasonable potential analysis is conducted using these derived limits and

also after evaluating other issues (e.g. anti-backsliding, 'antidegradation):-

4. Mass limitations may be required in certain circu'mst'nces.' When mass limits 'are calculated the formula to be

used is as follows.

Mass (Ib/day) = Flow (mgd) * Conceniration (mg/i) * 8.34.

5. Final Limitations will typically be rounded to two (2) significant figures (based on EPA's -policy with its

national criteria) while consideniin-gthe PQL for a given parameter.- Rounding will be performed using the

following procedure (as recommended by the DHEC lab):

a. If the digit of interest is even and the number following it is a five (5), 'the digit of interest remains the

same.

b. If the digit of interest is odd and the number following it is a five (5), the digit of interest is rounded up.

c. If the digit of interest is even or odd and thefnumber following it is between 0 and 4, the digit of interest

remains the same.

d. If the digit of interest is even or odd and the number 'followingit is between6 and 9, the digit of inierest is

rounded up.
Rationale 

Page 22 of 47 

Permit No. SC0004278 

HI. PERMIT LIMITATIONS AND MONITORING REQUIREMENTS 

Outfall 001 

Description of outfall and wastewater treatment system: 

Operator requirements: Based op:. the treatment system described above, the PCA requires that the treatment system be 

classified as GrOup . The Efftrillttatl Certification Board Rules require that a Grade operator be assigned to 

operate this facility. Inspections of the facility will be required on a daily basis. 

Information for this outfall is based on NPDES Permit Application: 2C dated 12/20/04 dated 12/20/2004 

Waterbody Data from Wasteload Allocation dated 4-1-2003 

Receiving Waterbody: cfs MGD 

7Q10 or other critical flow condition at discharge point (0,2i0) 

Average Annual Flow or other critical flow condition at discharge point 

(AAF,) 

Is the discharge above a drinking water intake? Yes, Intake #S46101, City of Rock Hill, Lake Wylie 

Source Water Protection Waterbody Flow Data cfs MGD 

7Q lOor other critical flow condition at source water protection area boundary 

(Qvia) 

Average Annual Flow or other critical flow condition at source water protection 

area boundary (AAE) 

Dilution Factors (using formulas in Section G.2.a): 

DF, 

DF2 

DF3, if applicable 

DF,, if applicable 

TSS Values for metals calculations: 

Effluent TSS concentration (T SS e) (mg/1) (based on monthly average value) 

Background or In-stream TSS concentration (TSS,) (mg/I) (Default is 1 mg/l) 1.0 

Calculated In-stream Average TSS concentration after mixing (TSS,) (mg/1) 

Appendix 1 contains the calculations for the water quality-based permit limitations and reasonable potential determinations. 

***************************************************************************** 

A. Project Description: 

The Duke Energy Corporation, Catawba Nuclear Station (hefeinafter referred to as the Permittee) operates a nuclear 

powered steam electric generating facility with two nuclear units. The plant has a total rated electric generating 

capacity of 1129 megawatts (MWe) per unit per day. The facility is located on SC Highway 274 in Newport, South 

Rationale

Page 22 of 47

Permit No. SC0004278

m. PERMIT LIMITATIONS AND MONITORING REQUIREMENTS

Outfall 001

Description of outfall and wastewater treatment system:

Operator requirements: Based on-the treatment system described above, the PCA requires that the treatment system be

classified as Group .he lc E f l Certification Board Rules require that a Grade operator be assigned to

operate this facility. Inspections of the facility will be required on a daily basis.

Information for this outfall is based on NPDES Permit Application: 2C dated .12/20/04 dated 12/20/2004

Waterbody Data from Wasteload Allocation dated 4-1-2003

Receiving Waterbody: cfs MGD

7Q10 or other critical flow condition at discharge point (QQto)

Average Annual Flow or other critical flow condition at discharge point

(AAFd)

Is the discharge above a drinking water intake? Yes, Intake #S46101, City of Rock Hill, Lake Wylie

Source Water Protection Waterbody Flow Data cfs MGD

7QlOor other critical flow condition at source water protection area boundary

(QQ,3)

Average Annual Flow or other critical flow condition at source water protection

area boundary (AAF)

Dilution Factors (using formulas in Section C.2.a):

DF, __

DF2

DF,, if applicable I

DF4, if applicable I

TSS Values for metals calculations:

Effluent TSS concentration (TSS,) (mg/I) (based on monthly average value)

Background or In-stream TSS concentration (TSSb) (mg/l) (Default is I mg/I) 1.0

Calculated In-stream Average TSS concentration after mixing (TSS,,) (mg/I)

Appendix I contains the calculations for the water quality-based permit limitations and reasonable potential determinations.

A. Proiect Description:

The Duke Energy Corporation, Catawba Nuclear Station (hereinafter referred to as the Permittee) operates a nuclear

powered steam electric generating facility with two nuclear units. The plant has a total rated electric generating

capacity of 1129 megawatts (MWe) per unit per day. The facility is located on SC Highway 274 in Newport, South
Rationale 

Page 23 of 47 • 

Permit No:SC0004278 

CarOlina. The effluent discharge from this facility is subject ,to the Steam Electric Power Generating Point Source 

Category 40 CFR Part 423. 

The receiving water is Lake Wylie which is a Freshwater water body by (Regulation 61-69). . . A Freshwater is 

designated as freshwater suitable for primary contact recreation, secondary contact recreation, and as a source for 

drinking water after conventional treatment. The waters are suitable for fishing, and the survival and propagation of a 

balanced aquatic community, of fauna and flora, and for industrial and agricultural uses. 

B. General Information: 

1. Facility contact and mailing address follow: 

Cheryl Peed, EHS Manager 

Duke Energy Corporation/Catawba Nuclear Station'. 

4800 Concord Road 

York, South Carolina 29745 

2. Permitting Regulations and Guidance: 

1) Steam Electric Effluent Guidelines 40 CFR Part 423 • • • 

.2) NPDES Permits Regulation 61-9, State Register; June 28, 1996 

3) Water Classification and Standards (Regulation 61-68); Classified Waters (Regulations 61-69). State of South 

Carolina, June 26, 1998 

4) Guidance for NPDES Permits Issued to Steam Electric Power Plants, Rebecca W. Hanmer, Office of Water 

Enforcement and Perinits, USEPA, August 22, 1985.. 

3. Discharge: 

'"To Lake Wylie 

1) 7Q10 Flow = 0 cfs; 0 MGD 

2) Annual Average Flow = 0 cfs; 0 MGD 

3) Lake Wylie is a Freshwater (Reg.6I -69) 

4) Dilution factor (DF) = Stream flow + Facility Discharge = 

Facility Discharge 

WQ Aquatic Life DF1= 1.0 

WQ Human Health DF2= 1.0 

5) Instream Waste Concentration (IWC) = 100% • 

4. Flows: 

Total flow from the facility is 85.865 MGD, which is the sum of the following: 

1) 001 (Low pressure service water (42.171 MGD), nuclear service water (20.136 MGD), cooling tower blowdown 

(11.04 MGD of wastewater discharged via internal Outfall 005) and liquid radiological waste (0.02 MGD of 

wastewater treated and discharged via internal Outfall 004)) = 73.367 MGD 

2) 002 (0.46 MGD of wastewaters from the service building sump, turbine building sumps, diesel generator 

catchment sump, sulfuric acid tank containment drainage sump, yard drain secondary containment sumps, motor 

pool car wash water, rainwater from valve pit sumps, and transformer sumps. 0.3 MGD of metal cleaning 

wastewaters are also treated at this outfall. Liquid radiological wastes ,(0.02 MGD of wastewaters treated and 

discharged via internal Outfall 004) also may be discharged throughputfall 002 but typically this discharge is via 

Outfall 001. The Permittee also included cooling tower blowdown (currently discharged via Outfall 001) in it's 

description of Outfall 002. However, during discussions with the Permittee during permit development it was 

Rationale

Page 23 of 47

Permit No. SC0004278

Carolina. The effluent discharge from this facility is subject to the Steam Electric Power Generating Point Source

Category 40 CFR Part 423.

The receiving water is Lake Wylie which is a Freshwater water body by (Regulation 61-69). .A Freshwater is

designated as freshwater suitable for primary contact recreation, secondary contact recreation, and as a source for

drinking water after conventional treatment. The waters are suitable for fishing, and the survival and propagation of 2

balanced aquatic community, of fauna and flora, and for industrial and agricultural uses.

B. General Information:

1. Facility contact and mailing address follow:

Cheryl Peed, EHS Manager

Duke Energy Corporation/Catawba Nuclear Station

4800 Concord Road - -

York, South Carolina 29745

2. Permitting Regulations and Guidance:

1) Steam Electric Effluent Guidelines 40 CFR Part 423

.2) NPDES Permits Regulation 61-9, State Register, June 28, 1996

3) Water Classification and Standards (Regulation 61-68): Classified Waters (Regulations 61-69). State of South

Carolina, June 26, 1998

4) Guidance for NPDES Permits Issued to Steam Electric Power Plants, Rebecca W. Hanmer, Office of Water

Enforcement and Permits, USEPA, August 22, 1985..

3. Discharge:

''ToLake Wylie

1) 7Q10 Flow = 0 cfs; 0 MGD

2) Annual Average Flow = 0 cfs; 0 MGD

3) Lake Wylie is a Freshwater (Reg.61-69)

4) Dilution factor (DF) = Stream flow + Facility Discharge =

Facility Discharge

WQ Aquatic Life DF1 = 1.0

WQ Human Health DF2= 1.-0

5) Instream Waste Concentration (IWC) = 100%

4. Flows:

Total flow from the facility is 85.865 MGD, which is the sum of the following:

1) 001 (Low pressure service water (42.171 MGD), nuclear service water (20.136 MGD), cooling tower blowdown

(11.04 MGD of wastewater discharged via internal Outfall 005) and liquid radiological waste (0.02 MGD of

wastewater treated and discharged via internal Outfall 004)) = 73.367 MGD.

2) 002 (0.46 MGD of wastewaters from the service building sump, turbine building surnps, diesel generator

catchment sump, sulfuric acid tank containment drainage sump, yard drain secondary containment sumps, motor

pool car wash water, rainwater from valve pit sumps, and transformer sumps. 0.3 MGD of metal cleaning

wastewaters are also treated at this outfall. Liquid radiological wastes (0.02 MGD of wastewaters treated and

discharged via internal Outfall 004) also may be discharged throughbOutfall 002 but typically this discharge is via

Outfall 001. The Permittee also included cooling tower blowdown (currently discharged via Outfall 001) in it's

description of Outfall 002. However, during discussions with the Permittee during permit development it was
Rationale 

Page 24 of 47 

• Permit No. SC0004278 

revealed that cooling tower blowdown is not currently and has never been discharged via Outfall 002, but the 

Permittee would like to reserve the right to discharge in such a manner, should the need arise) = 1.41 MGD 

3) 003 (Sanitary sewerage) = 0.028 MGD 

4) 004 (Internal) Liquid Radiological Waste through Outfall 001 = 0.02 MGD 

5) 005 (Internal) Cooling Tower Blowdown through Outfall 001 = 11.04 MGD 

Outfall 001 

Description of Discharge: Outfall 001 consists of low pressure service water (42.171 MGD), nuclear service water (20.136 

MOD), cooling tower blowdown (11.04 MGD discharged via internal Outfall 005) and liquid radiological waste (0.02 

MGD of wastewaters treated and discharged via internal Outfall 004). The sum of these waste streams, 73.367 MGD, is 

discharged to the receiving stream with no treatment. Descriptions of these discharges are as follows: 

Cooling Tower Blowdown: See Outfall 005 for a description. 

Low Pressure Service Water: The low pressure service water is once-through, non-contact cooling water. 

Nuclear Service Water: The nuclear service water is once-through non-contact cooling water. 

Liquid Radiological waste: Liquid radiological wastes are treated at internal Outfall 004. See Outfall 004 for a 

description. 

RN pump bearing cleaning wastes: The nuclear service water pumps are cleaned annually to remove silt and deposits 

that restrict water flow. The monitoring and reporting of pH for Outfall 001 satisfies the concerns for this waste 

stream. 

Applicable effluent guidelines for this facility are the Steam Electric Point Source Category for existing sources, which 

provide the following limitations: 

1. There shall be no discharge of PCBs. 

2. Once-through cooling water shall have the following limitations: 

Parameter Maximum 

concentration (mg/1) 

Total Residual Chlorine 0.20 

3. Neither free available nor total residual chlorine may be discharged from any single generating unit for more than two 

hours per day and not more than one unit in any plant may discharge free available or total residual chlorine 

simultaneously unless the discharger demonstrates to the permitting authority that discharge for more than two hours is 

required for macro invertebrate control. 

A. Flow 

1. Form 2C Value:(3-21-00) 365 samples 

= 62.6 MGD long term average value 

= 93.6 MGD maximum 30 day value 

= 93.58 MGD maximum daily value 

__L -II

Rationale

Page 24 of 47

Permit No. SC0004278

revealed that cooling tower blowdown is not currently and has never been discharged via Outfall 002, but the

Permittee would like to reserve the right to discharge in such a marner, should the need arise) = 1.41 MGD

3) 003 (Sanitary sewerage) = 0.028 MGD

4) 004 (Internal) Liquid Radiological Waste through Outfall 001 = 0.02 MGD

5) 005 (Internal) Cooling Tower Blowdown through Outfall 001 = 11.04 MGD

Outfall 001

Description of Discharge: Outfall 001 consists of low pressure service water (42.171 MGD), nuclear service water (20.136

MGD), cooling tower blowdown (11.04 MGD discharged via internal Outfall 005) and liquid radiological waste (0.02

MGD of wastewaters treated and discharged via internal Outfall 004). The sum of these waste streams, 73.367 MGD, is

discharged to the receiving stream with no treatment. Descriptions of these discharges are as follows:

Cooling Tower Blowdown: See Outfall 005 for a description.

Low Pressure Service Water: The low pressure service water is once-through, non-contact cooling water.

Nuclear Service Water: The nuclear service water is once-through non-contact cooling water.

Liquid Radiological waste: Liquid radiological wastes are treated at internal Outfall 004. See Outfall 004 for a

description.

RN pump bearing cleaning wastes: The nuclear service water pumps are cleaned annually to remove silt and deposits

that restrict water flow. The monitoring and reporting of pH for Outfall 001 satisfies the concerns for this waste

stream.

Applicable effluent guidelines for this facility are the Steam Electric Point Source Category for existing sources, which

provide the following limitations:

1. There shall be no discharge of PCBs.

2. Once-through cooling water shall have the following limitations:

Parameter Maximum

concentration (mg/I)

Total Residual Chlorine 0.20

3. Neither free available nor total residual chlorine may be discharged from any single generating unit for more than two

hours per day and not more than one unit in any plant may discharge free available or total residual chlorine

simultaneously unless the discharger demonstrates to the permitting authority that discharge for more than two hours is

required for macro invertebrate control.

A. Flow

1. Form 2C Value:(3-21-00) 365 samples

= 62.6 MGD long term average value

= 93.6 MGD maximum 30 day value

= 93.58 MGD maximum daily value
Rationale 

• Page 25 of 47 

•Permit-No. SC0004278 

2. Previous Permit: Monitor and Report - 

3. Conclusion: As in the previous permit, the flow shall be monitored and reported by a continuous flow 

measurement device. 

B. Temperature 

1. Form 2C Value: (3/21/00) 

=18° C (64.4°F) long term average value 

= 30.5°C (86.9°F) maximum 30 day value 

= 24.7°C (76.46°F) maximum daily value 

29.5°C (85.1°F) long term average value 

= 35.1°C (95.18°F) maximum 30 day value 

= 35.3°C (95.18°F) maximum daily value 

(Winter) 181 samples 

(Winter) 

(Winter) 

(Summer) 184 samples 

(Summer) - • 

(Summer) 

2. Previous Permit: 5.6°C (10.0°F) (Apr-Sep) temperature rise above ambient; . • 

7.8°C (14.0°F) (Oct-Mar) temperature rise above ambient . . 

3. Water Classifications and Standards (Reg. 61-69): The receiving water temperature may not be increased by more 

than 5°F(2.8°C) above natural conditions or” exceed a•maximum of 90°F(32.2°C) unless a mixing zone has been 

established or a Section 316(a) determination under the Federal Clean Wafer Act has been completed. 

4. Conclusion: On September 15, 1988, a Section 316(a) report was 'submitted in support of a 316(a) thermal 

variance request. Subsequently, correspondence dated July 1, 1992, from the permittee to SCDHEC proposed a 

delta T of 10°F from April through August, and a delta T olleF from September through March: After a review 

of this request, our Office agreed with the following limits: Monthly Average 

Temperature Rise above ambient (April - SePtember) • 5:6°C(10.0°F) • 

Temperature Rise above ambient (October - March) 7.8°C(14.0°F) 

Required monitoring shall be continuous by recorder, as in the previous permit. 

C. pH Limitations 

1. Form 2C Value: (3-21-00) 52 samples 

= 7.0 s.u. minimum, 8.3 s.u. maximum maximum daily_value 

2. Previous Permit: 6.0 s.u. minimum, 9.0 s.u. maximum • 

3. Water Classifications and Standards (Reg.61-68): -The pH of the receiving waters shall be maintained between 6.0 

standard units and 8.5 standard units. 

4. Conclusion: Due to the Water Classifications and Standards (Reg.61=68), the permit shall monitor and report pH 

once per week by grab sample. 

D. Total Residual Chlorine_fTRC) 

1. Form 2C Value: (3-21-00) 50 samples 

= 0 ing/I long term average ' 

= 0 mg/1 maximum 30 day value 

= 0 mg/I maximum daily value 

2. Previous Permit: Monthly Average 0.011 mg/1; Daily Maximum 0.019 mg/1 

3. Effluent Guidelines: (0.2 mg/l)(73.6 MGD)/(82.14 MGD) = 0.18 7ng/1 . • 

4. Wasteload Allocation: Monthly Average 0.011 mg/1; Daily Maximum 0.019 mg/1 

5. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68.(50 FR 30784, July 29, 1985): 

Monthly Average = 0.011 mg/1X DPI= 0.011 mg/1 " 

Daily Maximum = 0.019 mg/1X DPI= 0.019 mg/1 

6. Detection Limit: 0.05 mg/I 

7. Conclusion: Since chlorine and sodium bromide are used in the cooling tower discharge, Total Residual Chlorine 

shall be limited to a monthly average of 0.011 mg/1 and a daily maximum of 0.019 mg/I, which is based on the 

: . 

Rationale

Page 25 of 47

- 'Permit-No. SC0004278

2. Previous Permit: Monitor and Report -

3. Conclusion: As in the previous permit, the flow shall be monitored and reported by 'a continuous flow

measurement device.

B. Temperature

1. Form 2C Value: (3/21/00)

=18° C (64.4 0F) long term average value (Winter) 181 samples

= 30.51C (86.91F) maximum 30 day value (Winter)

=24.70C,(76.46 0F) maximumdailyvalue (Winter)

= 29.5CC (85.10F) long'term average value (Summer) 184 samples

= 35.10C (95.180F) maximum 30 day value (Summer) -

= 35.10C (95.18 0F) maximum daily value (Summer)

2. Previous Permit: 5.60 C (I 0.00F) (Apr-Sep) temperature rise above ambient;

7.80C (14.0 0F) (Oct-Mar) temperature rise above ambient

3. Water Classifications and Standards (Reg. 61-69): The receiving water temperature may not be increased by more

than 57F(2.80C) above natural conditions or exceed a-maximum of 900 F(32.21C) unless a mixing zone has been

established or a Section 316(a) determination under the Federal Clean Water Act has been completed.

4. Conclusion: On September 15, 1988, a Section 316(a) report was submitted in support of a 316(a) thermal

variance request. Subsequently, correspondence dated July 1, 1992, from the permittee to SCDHEC proposed a

delta T of 10F from April through August, and a delta T of 149F from September through March. After.a review

of this request, our Office agreed with the following limits: Monthly Average

Temperature Rise above ambient (April - September) '5f6°C(10.00 F)

Temperature Rise above ambient (October - March) 7.81C(l 4.00F)

Required monitoring shall be continuous by recorder, as in the previous permit.

C. pH Limitations

1. Form 2C Value:(3-21-00) 52 samples

= 7.0 s.u. minimum, 8.3 s.u. maximum maximum daily-value

2. Previous Permit: 6.0 s.u. minimum, 9.0 s.u. maximum I

3. Water Classifications and Standards (Reg.61-68): The pH of the receiving waters shall be maintained between 6.0

standard units and 8.5 standard units. -

4. Conclusion: Due to the Water Classifications and Standards (Reg.61-68), the permit shall monitor and report pH

once per week by grab sample.

D. Total Residual Chlorine (TRC)

1. Form 2C Value: (3-21-00) 50 samples - ' ' -

= 0 mg/I long term average value

= 0 mg/l maximum 30 day value

= 0 mg/l maximum daily value

2. Previous Permit: Monthly Average 0.011 mgA; Daily Maximum 0.019 mg/I

3. Effluent Guidelines: (0.2 mg/l)(73.6 MGD)/(82.14 MGD) = 0.18'mg/I.

4. Wasteload Allocation: Monthly Average 0.011 mg/I; Daily Maximum 0.019 mg/I

5. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (50 FR 30784, July 29, 1985):

Monthly Average = 0.011 mg/ X DF, = 0.011 mg/ '

Daily Maximum =0.019 mg/IX DF1 =0.019 mg/l '

6. Detection Limit: 0.05 mg/'

7. Conclusion: Since chlorine and sodium bromide are used in the cooling tower discharge, Total Residual Chlorine

shall be limited to a monthly average of 0.011 mg/I and 'a -daily maximum of 0.019 mg/I, which is based on the
Rationale 

Page 26 of 47 

Permit No. SC0004278 

Water Classifications and Standards (Reg. 61-68) and effluent guidelines values for Total Residual Chlorine at a 

frequency of cnce per week. 

E. Nitrite (NO2) 

1. Form 2C Value: 0.55 mg/I maximum daily value (3-21-00) 

2. Previous Permit: Daily Maximum: 4.3 mg/I 

3. Past DMR Data (12/97-1/00): 1.3 mg/1 

4. Water Quality Criteria: No Observed Effect Concentration = 4.3 mg/1 

5. Drinking Water Standard (MCL): 1,000 ug/1 

6. Conclusion: Based on the NOEC, Nitrite (NO2) shall be limited to a daily maximum of 4.3 mg/1 at a frequency of 

once per occurrence as noted in our 11-22-93 letter. 

F. Cadmium, total 

1. Form 2C Value: <0.5 ug/1 maximum daily value (3-21-00) 

2. Previous Permit: Not regulated 

3. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 0.66 ug/1 X DF, = 0.66 ugh 

Daily Maximum = 1.32 ug/1 X DF1 = 1.32 ug/1 

4. Human Health Consideration: 0.005 mg/1X DF2= 0.005 ug/1 

5. Detection Limit: 0.01 mg/1 

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Cadmium as in the previous 

permit. 

G. Chromium, total 

1. Form 2C Value: <1.0 ug/l maximum daily value (3-21-00) 

= 1.0 ug/1 X 6.2 = 6.2 ug/1 

2. Previous Permit: A statement prohibiting the use of chromium based maintenance chemicals in the cooling towers 

was placed on the permit. 

3. Effluent Guidelines: 0.2 mg/1 monthly average; 0.2 mg/I daily max. 

4. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 11.0 ug/1 X DF1= 11.0 ,ug/1 

Daily Maximum = 16.0 ug/1 X DF1= 16.0 ug/1 

5. Human Health Consideration: 50 ug/l X DF2= 50 ug/1 

6. Detection Limit: 0.01 mg/1 

7. Conclusion: As in the previous permit, a statement prohibiting the use of chromium based maintenance chemicals 

in the cooling towers has been placed in the permit, and due to reasonable potential procedures, there will be no 

limit for Chromium. 

H. Copper, total 

1. Form 2C Value: 0.01 mg/1 maximum daily value (3-21-00) 

= 10 ug/1 X 6.2 --- 62 ugn 

2. Previous Permit: Not regulated 

3. Water Quality Criteria Allowable Effluent Concentration: 

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 6.5 ugh X DF1= 6.5 ug/1 

Daily Maximum = 9.2 ugh X DF1= 9.2 ug/1 

b. Organoleptic data: = Monthly Average: 1.0 mg/1; = Daily Maximum: 2.0 mg/I 

_ - U -

Rationale

Page 26 of 47

Permit No. SC0004278

Water Classifications and Standards (Reg. 61-68) and effluent guidelines values for Total Residual Chlorine at a

frequency of cnce per week.

E. Nitrite (NO,)

1. Form 2C Value: 0.55 mg/l maximum daily value (3-21-00)

2. Previous Permit: Daily Maximum: 4.3 mg/l

3. Past DMR Data (12/97-1/00): 1.3 mg/l

4. Water Quality Criteria: No Observed Effect Concentration = 4.3 mg/l

5. Drinking Water Standard (MCL): 1,000 ug/l

6. Conclusion: Based on the NOEC, Nitrite (NO2 ) shall be limited to a daily maximum of 4.3 mg/l at a frequency of

once per occurrence as noted in our 11-22-93 letter.

F. Cadmium, total

1. Form 2C Value: <0.5 ug/h maximum daily value (3-21-00)

2. Previous Permit: Not regulated

3. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 0.66 ug/l X DF, = 0.66 ug/l

Daily Maximum = 1.32 ug/l X DF, = 1.32 ug/i

4. Human Health Consideration: 0.005 mg/l X DF2 = 0.005 ug/l

5. Detection Limit: 0.01 mg/I

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Cadmium as in the previous

permit.

G. Chromium, total

1. Form 2C Value: <1.0 ug/l maximum daily value (3-21-00)

= 1.0 ug/lX6.2=6.2 ug/I

2. Previous Permit: A statement prohibiting the use of chromium based maintenance chemicals in the cooling towers

was placed on the permit.

3. Effluent Guidelincs: 0.2 mg/I monthly average; 0.2 mg/i daily max.

4. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 11.0 ugAI X DF, = 11.0,ug/i

Daily Maximum = 16.0 ughl X DF, = 16.0 ughl

5. Human Health Consideration: 50 ug/l X DF2 = 50 ug/A

6. Detection Limit: 0.01 mg/l

7. Conclusion: As in the previous permit, a statement prohibiting the use of chromium based maintenance chemicals

in the cooling towers has been placed in the permit, and due to reasonable potential procedures, there will be no

limit for Chromium.

H. Copper, total

1. Form 2C Value: 0.01 mg/I maximum daily value (3-21-00)

= 10ug/1X6.2=62ugA

2. Previous Permit: Not regulated

3. Water Quality Criteria Allowable Effluent Concentration:

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 6.5 ug/ X DF1 = 6.5 ug/l

Daily Maximum = 9.2 ug/l X DF1 = 9.2 ug/l

b. Organoleptic data: = Monthly Average: 1.0 mg/I; = Daily Maximum: 2.0 mg/I
Rationale 

Page 27 of 47 

Permit No. SC0004278 

4. Detection Limit: 0.01 mg/1 ' 

5. Conclusion:Using DReasonable Potential° Procedures as given in Chapter 3 of the US EPA publication Technical 

Support Document for Water Quality-based Toxics Control (dated March 1991) of the 2C Fonn sample results, 

total copper will be monitored and reported once per month for a period of 2 years, then these sample results will 

be evaluated to determine if a limit for total copper is needed. Also, any site specific study(s) conducted during the 

2 year period (e.g. Water Effect Ratio, Chemical Translator, Mixing Zone Biotic Ligand Model, etc.) will be 

considered. See Part III Special Condition No. 23. el 

I. Lead. total 

1. Form 2C Value: <2 ug/lmaximum daily value (3-21-00) 

2. Previous Permit: Not regulated 

3. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average =1.3 ug/1 X DF1 =1.3 ug/1 

Daily Maximum = 2.6 ug/1X DF1= 2.6 ug/1 

4. Human Health Consideration: 50 ug/1 X DF2= 50.0 4/1 

5. Detection Limit: 50.0 ug/1 t. 

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Lead as in the previous permit. 

J. Nickel total 

1. Form 2C Value: <2 ug/Imaximum daily value (3-21-00) 

2. Previous Permit: NOt regulated 

3. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.6I -68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 88.0 ug/1 X DF1= 88.0 ugh 

Daily Average = 176.0 ug/1 X DF1= 176.0 ugh 

4. Human Health Consideration: 4,600 ug/1 X DF2= 4,600 ug/1 

5. Drinking Water Standard (MCL): 100 ug/1 

6. Detection Limit: 20.0 ug/1 

7. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Nickel as in the previous permit. 

K. Selenium. total 

I. Form 2C Value: <2 ug/Imaximum daily value (3-21-90) 

2. Previous Permit: Not regulated 

3. Water Quality Criteria Allowable Instream Concentration: 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 5.0 ug/1 )Z DF1 = 5.0 ug/1 • 

Daily Maximum = 10.0 ug/1 X DF1 = 10.0 ug/1 

4. Human Health Consideration: 50.0 ug/1 X DF2= 50.0 ug/1 

5. Detection Limit: 5 ug/1 

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Selenium as in the previous 

permit. 

L. Zinc total 

I. Form 2C Value: 0.005 mg/1 maximum daily value (3-21-00) 

= 0.005 mg/I X 6.2 = 0.031 mg/1 

2. Previous Permit: A statement prohibiting the use of zinc based maintenance chemicals in the cooling towers was 

placed on the permit. 

3. Effluent Guidelines: 1.0 mg/1 monthly average, 1.0 mg/1 daily max. 

4. Water Quality Criteria Allowable Effluent Concentration: 

Rationale

Page 27 of 47

Permit No. SC0004278

4. Detection Limit: 0.01 mg/i

5. Conclusion:Using OReasonable PotentialO Procedures as given in Chapter 3 of the US EPA publication Technical

Support Document for Water Quality-based Toxics Control (dated March 1991) of the 2C :Form sample results,

total copper will be monitored and reported once per month for a period of 2 years, then these sample results will

be evaluated to determine if a limit for total copper is needed. Also, any site specific study(s) conducted during the

2 year period (e.g. Water Effect Ratio, Chemical Translator, Mixing Zone Biotic Ligand Model, etc.) will be

considered. See Part HI Special Condition No. 23.

I. Lead. total

1. Form 2C Value: <2 ug/lImaximum daily value (3-21-00)

2. Previous Permit: Not regulated

3. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 1.3 ug/l X DF, = 1.3 ugfl

Daily Maximum = 2.6 ug/l X DF1 = 2.6 ug/l

4. Human Health Consideration: 50 ug/l X DF2 = 50.0 ugl

5. Detection Limit: 50.0 ugl6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Lead as in the previous permit.

J. Nickel total

1. Form 2C Value: <2ug/lmaximum daily value (3-21-00)

2. Previous Permit: Not regulated

3. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average 88.0 ug/l X DF, = 88.0 ug/l

Daily Average = 176.0 ugh X DF, = 176.0 ug/l

4. Human Health Consideration: 4,600 ug/] X DF2 = 4,600 ugh

5. Drinking Water Standard (MCL): 100 ugll

6. Detection Limit: 20.0 ugh

7. Conclusion: Due to the levels indicated on'the 2C Form, there will be no limit for Nickel as in the previous permit.

K. Selenium, total -

1. Form 2C Value: <2ug/lmaximum daily value (3-21-00)

2. Previous Permit: Not regulated

3. Water Quality Criteria Allowable Instream Concentration:

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22,1992):

Monthly Average = 5.0 ugh X DF, = 5.0 ugADaily Maximum = 10.0 ugI X DF, = 10.0 ug/l

4. Human Health Consideration: 50.0 ugh X DF2 = 50.0 ughl

5. Detection Limit: 5 ug-.

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Selenium as in the previous

permit.

L. Zinc, total

I. Form 2C Value: 0.005 mg/i maximum daily value (3-21-00)

= 0.005 mg/l X 6.2 = 0.031 mg/I

2. Previous Permit: A statement prohibiting the use of zinc based maintenance chemicals in the cooling towers was

placed on the permit.

3. Effluent Guidelines: 1.0 mg/l monthly average, 1.0 mg/I daily max.

4. Water Quality Criteria Allowable Effluent Concentration:
Rationale 

Page 28 of 47 

Permit No. SC0004278 

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 59 ugh X DF1= 59.0 ug/1 

Daily Maximum = 65 ugh X DF1= 65.0 ug/l 

b. Organoleptic data: Monthly Average: = 5.0 mg/I 

Daily Maximum: =10.0 mg/1 

5. Human Health Consideration: 5.0 mg/1 X DF2= 5.0 mg/I 

6. Detection Limit: 0.01 mg/1 

7. Conclusion: As in the previous permit, a statement prohibiting the use of zinc based maintenance chemicals in the 

cooling towers has been placed in the permit. 

M. Hydrazine 

1. Form 2C Value: Not a Form 2C application parameter 

2. Previous Permit: Not limited 

3. ((8.34)(0.76 MGD)(0.43 mg/l)) = 2.73 lbs/day 

(2.73 lbs/day)/((82.5 MGD)(8.34)) = 0.004 mg/1 

3. Detection Limit: 0.005 mg/1 

4. Conclusion: Hydrazine may be discharged with liquid radiological wastes via Outfall 001 or 002, limitations for 

hydrazine were considered for both of these Outfalls. In the past permit, a limitation of 0.43 mg/1 daily maximum 

was imposed at Outfall 002. Due to the large amount of dilution from the cooling water at Outfall 001, hydrazine 

will not be limited. 

N. Ethylene Glycol 

1. Form 2C Value: Not a Form 2C application parameter 

2. Previous Permit: Not regulated 

3. (8.34)(0.76 MGD)(11.9 mg/I) = 75.4 lbs/day 

(75.4 Ibs/day)/((82.5 MGD)(8.34)) = 0.11 mg/1 

(8.34)(0.76 MGD)(23.8 mg/1) = 150 lbs/day 

(150 lbs/day)/((82.5 MGD)(8.34)) = 0.22 mg/1 

4. Detection Limit: 0.005 mg/1 

5. Conclusion: Ethylene Glycol may be discharged with radiological wastes via Outfall 001 or 002, ethylene glycol 

limitations were considered for both these Outfalls. Due to the large amount of dilution from the cooling water at 

Outfall 001, ethylene glycol will not be limited. 

0. Boron, total 

1. Form 2C Value:0.17 mg/1 maximum daily value (3-21-00) 

= 0.17 mg/1X 6.2 = 1.054 mg/I 

2. Previous Permit: Not regulated 

3. Past DMR Data (8/84-8/90): = <0.2 mg/1 Avg.; 0.58 mg/1 Daily Max. 

4. Drinking Water MCL (Maximum Contaminant Level) 

-from Water Quality Criteria, Second Edition, McKee & Wolf, California State Water Resources Control Board, 

Publication 3-A, Jan. 1963: 

monthly average: 20 mg/1 

daily maximum: 40 mg/I 

5. Detection Limit: 0.02 mg/1 

6. Conclusion: Using °Reasonable Potential Procedures° and due to the past sampling data for Boron, there will be 

no limit for Boron as in the previous permit. 

Outfall 002 

Outfall 002 consists of wastewater from sources including the service building sump, turbine building sumps, diesel 

-- - U

Rationale

Page 28 of 47

Permit No. SC0004278

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 59 ug/l X DF1 = 59.0 ugh

Daily Maximum = 65 ug/l X DF1 = 65.0 ug/l

b. Organoleptic data: Monthly Average: = 5.0 mg/I

Daily Maximum: =10.0 mg/I

5. Human Health Consideration: 5.0 mg/I X DF2 - 5.0 mg/I

6. Detection Limit: 0.01 mg/i

7. Conclusion: As in the previous permit, a statement prohibiting the use of zinc based maintenance chemicals in the

cooling towers has been placed in the pe mit.

M. Hydrazine

1. Form 2C Value: Not a Form 2C application parameter

2. Previous Permit: Not limited

3. ((8.34)(0.76 MGD)(0.43 mg/I)) = 2.73 lbs/day

(2.73 lbs/day)/((82.5 MGD)(8.34)) = 0.004 mg/i

3. Detection Limit: 0.005 mg/I

4. Conclusion: Hydrazine may be discharged with liquid radiological wastes via Outfall 001 or 002, limitations for

hydrazine were considered for both of these Outfalls. In the past permit, a limitation of 0.43 mg/I daily maximum

was imposed at Outfall 002. Due to the large amount of dilution from the cooling water at Outfall 001, hydrazine

will not be limited.

N. Ethylene Glvcol

1. Form 2C Value: Not a Form 2C application parameter

2. Previous Permit: Not regulated

3. (8.34)(0.76 MGD)(l 1.9 mg/I) = 75.4 lbs/day

(75.4 lbs/day)/((82.5 MGD)(8.34)) = 0.11 mg/I

(8.34)(0.76 MGD)(23.8 mg/I) = 150 lbs/day

(150 lbs/day)/((82.5 MGD)(8.34)) = 0.22 mg/I

4. Detection Limit: 0.005 mg/I

5. Conclusion: Ethylene Glycol may be discharged with radiological wastes via Outfall 001 or 002, ethylene glycol

limitations were considered for both these Outfalls. Due to the large amount of dilution from the cooling water at

Outfall 001, ethylene glycol will not be limited.

0. Boron, total

1. Form 2C Value:0.17 mg/I maximum daily value (3-21-00)

= 0.17 mg/I X 6.2 = 1.054 mg/I

2. Previous Permit: Not regulated

3. Past DMR Data (8/84-8/90): = <0.2 mg/I Avg.; 0.58 mg/I Daily Max.

4. Drinking Water MCL (Maximum Contaminant Level)

-from Water Quality Criteria, Second Edition, McKee & Wolf, California State Water Resources Control Board,

Publication 3-A, Jan. 1963:

monthly average: 20 mg/I

daily maximum: 40 mg/I

5. Detection Limit: 0.02 mg/I

6. Conclusion: Using OReasonable Potential ProceduresO and due to the past sampling data for Boron, there will be

no limit for Boron as in the previous permit.

Outfall 002

Outfall 002 consists of wastewater from sources including the service building sump, turbine building sumps, diesel
Rationale 

Page 29 of 47 

Permit No. SC0004278 

generator catchment sump, sulfuric acid tank containment drainage sump, yard drain secondary containment sumps, 

rainwater from valve pit sumps, transformer sumps, and metal cleaning wastes (0.3 MGD/occurrence). The sum of these 

waste streams, 1.41 MGD, is discharged to the receiving water after treatment in the conventional wastewater treatment 

system, which incorporates sedimentation, skimming, precipitation, co-precipitation, neutralization, chemical exidatiOn, 

and mixing. Liquid radiological wastes (0.02 MGD of wastewaters treated and discharged via internal Outfall 004) also 

may be potentially discharged through Outfall 002 but typically discharges via Outfall 001.• . • • - 

The Permittee also included cooling tower blowdown (currently discharged via Outfall 001) in its desct'iption of Outfall 

002. However, during discussions with the Permittee during the permit development process it was revealed that cooling 

tower blowdown is not currently discharged via Outfall 002, but the Perrnittee would like to, reserve the ,right to discharge 

in such a manner, should the need arise (i.e., chlorine from the cooling tower at high levels). Therefore, 'two sets of 

limitations are derived based on the current and the possible situations. 

• ,•, • . . 

Applicable effluent guidelines for this facility are the Steam Electric Point Source Category for existing sources, which 

provide the following limitations: 

1. The pH of all discharges, except once-through cooling water shall be 

within the range of 6.0 standard units to 9.0 standard units. • 

• 

2. There shall be no discharge of PCBs. 

3. Low volume wastes 

Parameter Maximum for any Average of daily values 

1 day (mg/1) for 30 consecutive daysl 

shall not exceed (mg/1) 

Total Suspended Solids 100.0 30.0 

Oil and Grease 20.0 • 15.0 

4. Metal cleaning wastes shall have the following limitations: 

Parameter Maximum for any Average of daily values 

1 day (mg/1) for 30 consecutive days2 

shall not exceed (mg/1) 

Total Suspended Solids 100.0 30.0 

Oil and Grease 20.0 15.0 . 

Copper, total 1.0 • 1.0 

Iron, total 1.0 • 1.0 • 

A. Flow 

1. Form 2C Value: (3-21-00) 94 samples 

= 1.47 MGD long term average value 

= 2.12 MGD maximum daily value 

'For purposes of this permit, 30 day average and monthly average shall be deemed as equivalent. 

2 For purposes of this permit, 30 day average and monthly average shall be deemed as equivalent. 

Rationale

Page 29 of 47

Permit No. SC0004278

generator catchment sump, sulfuric acid tank containment drainage sump, yard drain secondary; containment sumps,

rainwater from valve pit sumnps, transformer sumps, and metal cleaning wastes (0.3 ,MGD/occurrence). The sum of these

waste streams, 1.41 MGD, is discharged to the receiving water after treatment in the conventional wastewater treatment

system, which incorporates sedimentation, skimming, precipitation, co-precipitation, neutralization, chemical oxidation,

and mixing. Liquid radiological wastes (0.02 MGD of wastewaters treated and discharged via internal Outfall 004) also

may be potentially discharged through Outfall 002 but typically discharges via Outfall 001.'

The Permittee also included cooling tower blowdown (currently discharged via Outfall 001) in its description of Outfall

002. However, during discussions with the Permittee during the permit development process it was revealed that cooling

tower blowdown is not currently discharged via Outfall 002, but the Permittee would like to reserve the right to discharge

in such a manner, should the need arise (i.e., chlorine from the cooling tower at high levels). Therefore,' two sets of

limitations are derived based on the current and the possible situations.

Applicable effluent guidelines for this facility are the Steam Electric Point Source Category for existing sources, which

provide the following limitations:

I . The pH of all discharges, except once-through cooling water shall be

within the range of 6.0 standard units to 9.0 standard units..

2. There shall be no discharge of PCBs.

3. Low volume wastes

Parameter Maximum for any Average of daily values

I day (mg/l) for 30 consecutive days

shall not exceed (mg/I)

Total Suspended Solids 100.0 30.0

Oil and Grease 20.0 I 5.0

Metal cleaning wastes shall have the following limitations:

Parameter Maximum for any Average of daily values.

4.

I day (mg/I)

shall not exceed

for 30 consecutive days2

(mg/I)

Total Suspended Solids' 100.0 30.0

Oil and Grease 20.0 15.0

Copper, total '.0 - -- 1.0

Iron, total 1.0 : 1.0 I. .;

A. Flow

1. Form 2C Value:(3-21-00) 94 samples

= 1.47 MGD long term average value

= 2.12 MGD maximum daily value

'For purposes of this permit, 30 day average and monthly average shall be deemed as equivalent.

2 For purposes of this permit, 30 day average and monthly average shall be deemed as equivalent.
Rationale 

Page 30 of 47 

Permit No. SC0004278 

2. Previous Permit: Monitor and Report 

3. Wasteload Allocation: A flow limit of 1.29 MGD. 

4. Conclusion: Monitoring requirements of once per week by flow indicator, as in the previous permit, are adopted. 

B. Total Residual Chlorine (TRCI 

1. Form 2C Value: (3-21-00) 8 samples 

= 0 mg/1 long term average value 

= 0 mg/1 maximum daily value 

2. Previous Permit: Monthly Average 0.011 mg/1; Daily Maximum 0.019 mg/1 

3. Wasteload Allocation: Monthly Average 0.011 mg/1; Daily Maximum 0.019 mg/1 

4. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68 (50 FR 30784, July 29, 1985): 

Monthly Average 0.011 mg/1 

Daily Maximum 0.019 mg/1 

5. Detection Limit: 0.05 mg/1 

6. Conclusion: Chlorine is present through its use as hypochlorite during treatment and by its presence in chemicals 

contained in the low volume wastes. Total Residual Chlorine will be limited by Water Classifications and 

Standards (Reg. 61-68) to a monthly average of 0.011 mg/1 and a daily maximum of 0.019 mg/1. Monitoring will 

be conducted once per day over a two day period after treatment by grab sample. 

C. 5-dav Biochemical Oxygen Demand (BOD1) 

1. Form 2C Value: (3-21-00) 13 samples 

= 3.9 mg/1; 47.8 lbs/day long term average value 

= 6.2 mg/1; 109.7 lbs/day maximum daily value 

2. Previous Permit: Monitor and Report 

3. Wasteload Allocation: Monitor and Report 

4. Detection Limit: <2 mg/1 

5. Conclusion: Due to the possibility that the expected differing physical characteristics of the two water bodies may 

inhibit mixing, thus trapping pollutants in the small cove, The permittee will be required monitor and report for 

BODsonce per month The monitoring shall be conducted once per month by grab sample type. 

D. pH Limitations 

1. Form 2C Value: (3-21-00) 37 samples 

6.1 minimum, 8.5 maximum maximum daily value 

2. Previous Permit: 6.0 minimum, 9.0 maximum 

3. Effluent Guidelines: 6.0 minimum, 9.0 maximum 

4. Water Classifications and Standards (Reg.61-68): The p1-1 of the receiving waters shall be maintained between 6.0 

standard units standard units and 8.5 standard units. 

5. Conclusion: As in the previous permit, pH shall be limited to a minimum of 6.0 standard units to a maximum of 

9.0 standards units. Monitoring requirements shall be once per week by grab sample. 

E. Oil and Grease 

1. Form 2C Value: (3-21-00) 24 samples 

= I mg/1 long term average value 

= 2.7 mg/1 maximum 30 day value 

= 2.7 mg/1 maximum daily value 

2. Previous Permit: 15 mg/1 monthly average; 20 mg/1 daily maximum 

3. Effluent Guidelines:15 mg/1 monthly average; 20 mg/1 daily maximum 

4. Detection Limit: <5 mg/1 

5. Conclusion: With the exception of motor pool car wash water, all discharges from Outfall 002 have oil and grease 

Rationale

Page 30 of 47

Permit No. SC0004278

2. Previous Permit: Monitor ard Report

3. Wasteload Allocation: A flow limit of 1.29 MGD.

4. Conclusion: Monitoring requirements of once per week by flow indicator, as in the previous permit, are adopted.

B. Total Residual Chlorine (TRC)

1. Form 2C Value:(3-21-00) 8 samples

= 0 mg/i long term average value

= 0 mg/i maximum daily value

2. Previous Permit: Monthly Average 0.011 mg/I; Daily Maximum 0.0 19 mg/I

3. Wasteload Allocation: Monthly Average 0.011 mg/i; Daily Maximum 0.019 mg/I

4. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (50 FR 30784, July 29, 1985):

Monthly Average 0.011 mg/I

Daily Maximum 0.019 mg/i

5. Detection Limit: 0.05 mg/i

6. Conclusion: Chlorine is present through its use as hypochlorite during treatment and by its presence in chemicals

contained in the low volume wastes. Total Residual Chlorine will be limited by Water Classifications and

Standards (Reg. 61-68) to a monthly average of 0.011 mg/i and a daily maximum of 0.019 mg/l. Monitoring will

be conducted once per day over a two day period after treatment by grab sample.

C. 5-day Biochemical Oxvyen Demand (BOD5)

I. Form 2C Value: (3-21-00) 13 samples

= 3.9 mg/I; 47.8 lbs/day long term average value

= 6.2 mg/I; 109.7 lbs/day maximum daily value

2. Previous Permit: Monitor and Report

3. Wasteload Allocation: Monitor and Report

4. Detection Limit: <2 mg/i

5. Conclusion: Due to the possibility that the expected differing physical characteristics of the two water bodies may

inhibit mixing, thus trapping pollutants in the small cove, The permittee will be required monitor and report for

BOD5 once per month The monitoring shall be conducted once per month by grab sample type.

D. pH Limitations

1. Form 2C Value: (3-21-00) 37 samples

6.1 minimum, 8.5 maximum maximum daily value

2. Previous Permit: 6.0 minimum, 9.0 maximum

3. Effluent Guidelines: 6.0 minimum, 9.0 maximum

4. Water Classifications and Standards (Reg.61-68): The pH of the receiving waters shall be maintained between 6.0

standard units standard units and 8.5 standard units.

5. Conclusion: As in the previous permit, pH shall be limited to a minimum of 6.0 standard units to a maximum of

9.0 standards units. Monitoring requirements shall be once per week by grab sample.

E. Oil and Grease

1. Form 2C Value: (3-21-00) 24 samples

= I mg/I long term average value

= 2.7 mg/i maximum 30 day value

= 2.7 mg/I maximum daily value

2. Previous Permit: 15 mg/l monthly average; 20 mg/I daily maximum

3. Effluent Guidelines: 15 mg/i monthly average; 20 mg/I daily maximum

4. Detection Limit: <5 mg/I

5. Conclusion: With the exception of motor pool car wash water, all discharges from Outfall 002 have oil and grease
• 

Rationale 

Page 31 of 47 

Permit No. SC0004278 

limitations of 15 mg/I daily average and 20 mg/I daily maximum (i.e., low volume and metal cleaning wastes) as 

per the Steam Electric Effluent Guidelines. 

Since the motor pool car wash water provides dilution, it must be accounted for via the following': 

30 day Daily 

Flow Average Maximum 

Total low volume 

and metal cleaning 

wastes process flows 

Total non-contaminated flows 

- cooling tower blowdown 

- car wash water 

0.7592 MGD . 15 mg/1 . .20 mg/I . 

• I : ; : • • 

0.0 MGD 0 mg/1 3 mg/I 

0.0008 MGD 15 mg/I 20 mg/1 

Total flows 0.76 MGD 

Using this data, the limitations at Outfall 001 are calculated as follows: 

Oil and Grease Monthly Average Limit 

0.7592 (15) + 0.0 (0) + 0.0008 (15) = 15 mg/I 

0.76 

Oil and Grease Daily Maximum Limit 

0.7592 (20) + 0.0 (3) + 0.0008 (20) = 20 mg/1 

0.76 

Monitoring requirements of once per month by grab sample, as in the previous permit. 

F. Total Suspended Solids (TSS) 

1. Form 2C Value: (3-21-00) 24 samples 

= 6.4 mg/I long term average value 

= 17.4 mg/I maximum daily value 

2. Previous Permit: 30 mg/1 daily average, 100 mg/1 daily maximum • • 

3. Effluent Guidelines: 30 mg/l monthly average and 100 mg/1 daily maximum 

4. Detection Limit: <1 mg/1 

5. Conclusion: With the exception of motor pool car wash water, all discharges from Outfall 002 have TSS 

limitations of 30 mg/1 daily average and 100 mg/1 daily maximum (i.e., low.volume and metal cleaning wastes) as 

per the Steam Electric Effluent Guidelines. 

Since the motor pool car wash water provides dilution, it must be accounted for via the following: 

30 day Daily 

how Average Maximum • 

Total low volunie 

and metal cleaning 

waste process flows 0.7592 MGD 30 mg/1 100 mg/1 

3 The procedures and limitations for flow weighted averaging calculations when regulated waste streams are commingled are 

taken from the August 22, 1985, memo entitled "Guidance for NPDES Permits Issued to Steam Electric Power Plants." 

Rationale

Page 31 of 47

Permit No. SC0004278

limitations of 15 mg/l daily average and 20 mg/I daily maximum (i.e., low volume and metal cleaning wastes) as

per the Steam Electric Effluent Guidelines.

Since the motor pool car wash water provides dilution, it must be accounted for via the following3:

30 day Daily

Flow Average Maximum

Total low volume

and metal cleaning

wastes process flows 0.7592 MGD 15mg/ 20 mg/I

Total non-contaminated flows

- cooling tower blowdown 0.0 MGD 0 mg/ 3 mg/1

- carwash water 0.0008 MGD 15 mg/I 20 mg/I

Total flows 0.76 MGD

Using this data, the limitations at Outfall 001 are calculated as follows:

Oil and Grease Monthly Average Limit

0.7592 (15) + 0.0 (0) + 0.0008 (IS) = 15 mg/l

0.76

Oil and Grease Daily Maximum Limit

0.7592 (20) + 0.0 (3) + 0.0008 (20) =20 mg/l - 0.76 -

Monitoring requirements of once per month by grab sample, as in the previous permit.

F. Total Suspended Solids (TSS)

1. Form 2C Value:(3-21-00) 24 samples

= 6.4 mg/l long term average value . -

=17.4 mg/l maximum daily value .; .

2. Previous Permit: 30 mg/I daily average, 1 00 mg/I daily maximum .

3. Effluent Guidelines: 30 mg/I monthly average and 100 mg/] daily maximum

4. Detection Limit: <1 mg/I

5. Conclusion: With the exception of motor pool car wash water, all discharges from Outfall 002 have TSS

limitations of 30 mg/l daily average and 100 mg/I daily maximuim (i.e., low volume and metal cleaning wastes) as

per the Steam Electric Effluent Guidelines.

Since the motor pool car wash water provides dilution, it must be accounted for via the following:

:30day ; Dailyi

Flow Average Maximum

Total low volume

and metal cleaning

waste process flows 0.7592 MGD 30 mg/I 100 mg/l

3 The procedures and limitations for flow weighted averaging calculations when regulated waste streams are commingled are

taken from the August 22, 1985, memo entitled ''Guidance for NPDES Permits Issued to Steam Electric Power Plants."
Rationale 

Page 32 of 47 

Permit No. SC0004278 

Total non-contaminated flows 

- cooling tower blowdown 0.0 MGD 30 mg/1 60 mg/1 

- car wash water 0.0008 MGD 30 mg/1 100 mg/1 

Total flows 0.76 MGD 

Using this data, the limitations at Outfall 001 are calculated as follows: 

TSS Monthly Average Limit 

0.7592 (30) + 0.0 (30) + 0.0008 (30)= 30 mg/1 

0.76 

TSS Daily Maximum Limit 

0.7592 (100) + 0.0 (60) + 0.0008 (100) = 100 mg/1 

0.76 

Monitoring requirements of once per month by grab sample, as in the previous permit. 

G. Cadmium, total 

1. Form 2C value: <0.5 ug/1 maximum daily value (3-21-00) 

2. Previous Permit: Not regulated 

3. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 0.66 ug/l X DF1= 0.66 ug/1 

Daily Maximum = 1.32 ug/1 X DF1= 1.32 ug/1 

4. Human Health Consideration: 0.01 mg/1X DF2= 0.01 ug/1 

5. Detection Limit: 10.0 ug/1 

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Cadmium as in the previous 

permit. 

H. Copper. total 

1. Form 2C Value: 6 ugh maximum daily value (3-21-00) 

6 ug/1 X 6.2 = 37.2 ug/1 

2. Previous Permit: a monthly average and daily maximum of 0.0125 mg/1 

3. Effluent Guidelines: 1.0 mg/I monthly average, 1.0 mg/1 daily max. 

4. Intake Background Levels (10-1-91): 0.006 mg/1 

5. Water Quality Criteria Allowable Effluent Concentration: 

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60843, Dec. 22, 1992): 

Monthly Average = 6.5 ug/I X DF1= 6.5 ug/1 

Daily Maximum = 9.2 ug/1 X DF1= 9.2 ug/1 

b. Organoleptic data: = Monthly Average: 1.0 mg/I 

= Daily Maximum: 2.0 mg/I 

6. Detection Limit: 0.01 mg/1 

7. Conclusion: With the exception of metal cleaning wastes, the sources of discharge at this outfall (0.7592 MGD of 

low volume wastes and 0.0008 MGD of car pool wash water) are not regulated for copper. Therefore, at the point 

of discharge from Outfall 002, the copper limit (both monthly average and daily maximum), after flow weighted 

averaging to account for dilution, would be: 

(1.0 mg/l)(0.3 MGD)/(0.76 MGD) = 0.395 mg/I 

Due to no dilution being provided by the receiving waters, the effluent limit for Outfall 002 based on water quality 

Rationale

Page 32 of 47

Permit No. SC0004278

Total non-contaminated flows

- cooling tower blowdown 0.0 MGD 30 mg/i 60 mg/i

- car wash water 0.0008 MGD 30 mg/i 100 mg/I

Total flows 0.76 MGD

Using this data, the limitations at Outfall 001 are calculated as follows:

TSS Monthly Average Limit

0.7592 (30) + 0.0 (30) + 0.0008 (30)= 30 mg/i

0.76

TSS Daily Maximum Limit

0.7592 (100) + 0.0 (60) + 0.0008 (100) = 100 mg/I

0.76

Monitoring requirements of once per month by grab sample, as in the previous permit.

G. Cadmium, total

1. Form 2C value: <0.5 ugh maximum daily value (3-21-00)

2. Previous Permit: Not regulated

3. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 0.66 ugA X DF, = 0.66 ug/h

Daily Maximum = 1.32 ug/l X DF, = 1.32 ugh

4. Human Health Consideration: 0.01 mg/I X DF2 = 0.01 ugA

5. Detection Limit: 10.0 ug/I

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Cadmium as in the previous

permit.

H. Copper. total

I. Form 2C Value: 6 ug1 maximum daily value (3-21-00)

6 ug/ X 6.2 = 37.2 ug/1

2. Previous Permit: a monthly average and daily maximum of 0.0125 mg/I

3. Effluent Guidelines: 1.0 mg/I monthly average, 1.0 mg/i daily max.

4. Intake Background Levels (10-1-91): 0.006 mg/I

5. Water Quality Criteria Allowable Effluent Concentration:

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 6.5 ugA X DF, = 6.5 ug/h

Daily Maximum = 9.2 ug/I X DF, = 9.2 ugh

b. Organoleptic data: = Monthly Average: 1.0 mg/I

= Daily Maximum: 2.0 mg/l

6. Detection Limit: 0.01 mgA

7. Conclusion: With the exception of metal cleaning wastes, the sources of discharge at this outfall (0.7592 MGD of

low volume wastes and 0.0008 MGD of car pool wash water) are not regulated for copper. Therefore, at the point

of discharge from Outfall 002, the copper limit (both monthly average and daily maximum), after flow weighted

averaging to account for dilution, would be:

(1.0 mg/1)(0.3 MGD)/(0.76 MGD) = 0.395 mg/l

Due to no dilution being provided by the receiving waters, the effluent limit for Outfall 002 based on water quality
Rationale 

. Page 33 of 47 

Permit No. SC0004278 

criteria is 0.0065 mg/I maximum, which is more stringent than the limit based on effluent guidelines. Therefore, 

the water quality based limit of 0.0065 mg/1 daily maximum is -adopted. A monthly average limitation is not 

adopted since the daily maximum is more stringent than what the monthly average would be. With the 'addition of 

the intake background level of 0.006 mg/I, a limit of 0.0125 mg/1 is established. Monitoring requirements of once 

per metal cleaning occurrence are adopted. Monitoring requirements are based on both the ;possibility of 

exceedence of these limitations (the application indicates <0.03 mg/i at the discharge-from Outfall 002) and the 

potential that the highest concentrations of copper Will be evident during metal cleaning waste treatment. • - 

I. Chromium, total 

1. Form 2C Value: <1 ughmaximum daily value (3-21-00) 

2. Previous Permit: Not regulated 

3. Effluent Guidelines: 0.2 mg/1 monthly average; 0.2 mg/I daily max. 

4. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec.-22, 1992): 

Monthly Average =11.0 ugh X DFI = 11.0 ugh 

Daily Maximum = 16.0 ug/1 X DFI = 16.0 ugh 

5. Human Health Consideration: 50 ugh X DF2= 50 ugh 

6. Detection Limit: 0.01 mg/I 

7. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Chromium as in the previous 

permit. 

J. Iron, total 

I. Form 2C Value: 0.15 mg/1 maximum daily value (3-21-00) 

2. Previous Permit: a monthly average and daily maximum of 0.645 mg/I 

3. Effluent Guidelines: 1.0 mg/1 monthly average, LO mg/1 daily max. 

4. Intake Background levels: 0.48 mg/I (3-27-97) 

5. Detection Limit: 0.001 mg/I 

6. Conclusion: With the exception of metal cleaning wastes, the sources of discharge at this outfall (0.7592 MGD of 

low volume wastes and 0.0008 MGD of car pool wash water) are not regulated for iron. Therefore, at the point of 

discharge from Outfall 002, the iron limit (both monthly average and daily maximum), after flow weighted 

averaging to account for dilution, would be: (1.0 mg/1)(0.3 MGD)/(0:76 MGD) = 0.395 .mg/1 

Therefore, with the addition of the intake background level of 0.48 mg/1, a limit of 0.875 mg/1 daily maximum and 

monthly average are adopted at the discharge point from Outfall 002.: Monitoring .requirements of once per metal 

cleaning occurrence by grab sampleare adopted based on the previous'monitaring requirements at Outfall 005. 

K. Lead, total 

1. Form 2C value: 2.6 ug/Imaximum daily value (3-21-00) - 

2. Previous Permit: Not regulated 

3. Water Quality Criteria AlloWable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average =1.3 rg/1 X DF1 = 1.3 ugh 

DailY_Maximum = 2.6 ugh X DF1= 2.6 ugh 

4. Human Health Consideration: 50 ug/I X DF2= 50.0 ug/l . 

5. Detection Limit: 50.0 ugh • • 

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Lead as in the previous permit. 

L. Nickel, total 

1. Form 2C value: <2 ugh maximum daily value (3-21-00) 

2. Previous Permit: Not regulated 

3. Water Quality Criteria Allowable Effluent Concentration: • • . 

Rationale

'Page 33 of 47

Permit No. SC0004278

criteria is 0.0065 mg/l maximum, which is more stringent than the limit based on effluent guidelines. Therefore,

the water quality based limit of 0.0065 mg/i daily maximum is' adopted.' A monthly average limitation is not

adopted since the daily maximum is more stringent than what the monthly average would be. With the addition of

the intake background level of 0.006 mg/I, a limit of 0.0125 mg/i is established. Monitoring requirements of once

per metal cleaning occurrence are adopted. Monitoring requirements are based on both the:possibility of

exceedence of these limitations (the application indicates <0.03 mg/l at the discharge-from Outfall 002) and the

potential that the highest concentrations of copper will be evident 'during metal cleaning'waste treatment.

1. Chromium, total

1. Form 2C Value: <I ug/Imaximum daily value (3-21-00)'

2. Previous Pernit: Not regulated

3. Effluent Guidelines: 0.2 mg/i monthly average; 0.2 mg/I daily max.

4. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec.22, 1992): -. :

Monthly Average = 1.0 ug/I X DF, = 1.0 ug/l

DailyMaximum 16.0 ug/l X DF, =16.0 ug' - .

5. Human Health Consideration: 50 ug/I X DF2 50 ug/l

6. Detection Limit: 0.01 mg/I

7. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Chromium as in the previous

permit.

J. Iron, total

1. Form 2C Value: 0.15 mg/I maximum daily value (3-21-00)

2. Previous Permit: a monthly average and daily maximum of 0.645 mg/I

3. Effluent Guidelines: 1.0 mg/I monthly average, 1.0 mg/I daily max. - -

4. Intake Background levels: 0.48 mg/I (3-27-97)

5. Detection Limit: 0.001 mg/I -'

6. Conclusion: With the exception of metal cleaning wastes, the sources of discharge at this outfall (0.7592 MGD of

low volume wastes and 0.0008 MGD of car pool wash water) are not regulated for iron. Therefore, at the point of

discharge from Outfall 002, the iron limit (both monthly average and daily maximum), after flow weighted

averaging to account for dilution, would be: (1.0 mg/1)(0.3 MGD)/(0.76 MGD) =0.395 mg/I

Therefore, with the addition of the intake background level of 0.48 mg/I, a limit of 0.875 mg/I daily maximum and

monthly average are adopted at the discharge point from Outfall 002.: Monitoringxrequirements of once per metal

cleaning occurrence by grab sampleare adopted based on the previous monitoring requirements at Outfall 005.

K. Lead, total

1. Form 2C value: 2.6 ug/Imaximum daily value (3-21-00) - ' -

2. Previous Pernit: Not regulated - X

3. Water Quality Criteria Allowable Effluent Concentration: -' -.- .

Aquatic Life Criteria from Reg.61 -68 (57 FR 60848, Dec. 22, 1992):

Monthly Average 1.3 ug/A X DF, 1.3 ug '

Daily Maximum =2.6 ug/l X DF =2.6 ig/l4. Human Health Consideration: 50 ug/I X DF2 = 50.0 ug/l.

5. Detection Limit: 50.0 ug/I

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Lead as in the previous permit.

L. Nickel. total

1. Form 2C value: <2 ug/I maximum daily value (3-21-00)

2. Previous Permit: Not regulated

3. Water Quality Criteria Allowable Effluent Concentration:
Rationale 

Page 34 of 47 

Permit No. SC0004278 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 88.0 ug/1 X DF1= 88.0 ug/1 

Daily Average= 176.0 ug/1 X DF1= 176.0 ug/1 

4. Human Health Consideration: 4,600 ug/1 X DF2= 4,600 ug/1 

5. Drinking Water Standard (MCL): 100 ug/1 

6. Detection Limit: 20.0 ug/1 

7. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Nickel as in the previous permit. 

M. Selenium. total 

1. Form 2C value: <2 ug/1 maximum daily value (3-21-00) 

2. Previous Permit: Not regulated 

3. Water Quality Criteria Allowable Instream Concentration: 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 5.0 ug/1 X DFI = 5.0 ug/1 

Daily Maximum = 10.0 ug/1 X DFI = 10.0 ug/1 

4. Human Health Consideration: 50.0 ug/1 X DF2= 50.0 ug/1 

5. Detection Limit: 0.005 mg/1 

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Selenium as in the previous 

permit. 

N. Zinc, total 

1. Form 2C Value: 0.04 mgil maximum daily value (3-21-00) 

0.04 mg/1X 6.2 = 0.248 mg/1 

2. Previous Permit: Not regulated 

3. Effluent Guidelines: 1.0 mg/I monthly average, 1.0 mg/1 daily max. 

4. Water Quality Criteria Allowable Effluent Concentration: 

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 59 ug/1 X DF1= 59.0 ug/1 

Daily Maximum = 65 ug/1 X DF1= 65.0 ug/1 

b. Organoleptic data: = Monthly Average: = 5.0 mg/1 

= Daily Maximum: =10.0 mg/1 

5. Human Health Consideration: 5.0 mg/1 maximum human health standard 

6. Detection Limit: 0.01 mg/1 

7. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Zinc as in the previous permit. 

0. Hydrazine 

1. Form 2C Value: Not a Form 2C application parameter 

2. Previous Permit: 0.43 mg/1 daily maximum 

3. Water Quality Criteria: 0.077 mg/I (Ceriodaphnia dubia) chronic toxicity value 

4. Detection Limit: 0.005 mg/1 

5. Conclusion: Hydrazine originates from both low volume wastes and from internal Outfall 004 and is therefore 

limited at this outfall. Due to Water Quality Criteria, Hydrazine shall be limited to a daily maximum of 0.077 mg/I. 

Monitoring requirements of once per occurrence by grab sample, as in the previous permit, are adopted. 

P. Nitrite (NO2) 

1. Form 2C value: 1 mg/1 (03-21-00) 

2. Previous Permit: Not regulated 

3. Water Quality Criteria: No Observed Effect Concentration = 4.3 mg/1 

4. Drinking Water Standard (MCL): 1000 ug/1 

5. Conclusion: Due to the NOEC, Nitrite (NO2) shall be limited to a daily maximum of 4.3 mg/I at a frequency of 

Rationale

Page 34 of 47

Permit No. SC0004278

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 88.0 ugh X DF1 = 88.0 ug/l

Daily Average= 176.0 ug/l X DF1 = 176.0 ugh

4. Human Health Consideration: 4,600 ug/h X DF2 = 4,600 ug/h

5. Drinking Water Standard (MCL): 100 ugh

6. Detection Limit: 20.0 ug/l

7. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Nickel as in the previous permit.

M. Selenium. total

1. Form 2C value: <2 ug/ maximum daily value (3-21-00)

2. Previous Permit: Not regulated

3. Water Quality Criteria Allowable Instream Concentration:

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 5.0 ug/l X DF1 = 5.0 ugh

Daily Maximum = 10.0 ug/l X DF1 = 10.0 ugh

4. Human Health Consideration: 50.0 ug/l X DF2 = 50.0 ug/l

5. Detection Limit: 0.005 mg/i

6. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Selenium as in the previous

permit.

N. Zinc, total

I. Form 2C Value: 0.04 mgil maximum daily value (3-21 -00)

0.04 mg/I X 6.2 = 0.248 mg/i

2. Previous Permit: Not regulated

3. Effluent Guidelines: 1.0 mg/I monthly average, 1.0 mg/i daily max.

4. Water Quality Criteria Allowable Effluent Concentration:

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 59 ugAI X DF, = 59.0 ug/l

Daily Maximum = 65 ug/I X DF, = 65.0 ugA

b. Organoleptic data: = Monthly Average: = 5.0 mg/I

= Daily Maximum: =10.0 mg/i

5. Human Health Consideration: 5.0 mg/i maximum human health standard

6. Detection Limit: 0.01 mg/I

7. Conclusion: Due to the levels indicated on the 2C Form, there will be no limit for Zinc as in the previous permit.

0. Hydrazine

1. Form 2C Value: Not a Form 2C application parameter

2. Previous Permit: 0.43 mg/I daily maximum

3. Water Quality Criteria: 0.077 mg/I (Ceriodaphnia dubia) chronic toxicity value

4. Detection Limit: 0.005 mg/I

5. Conclusion: Hydrazine originates from both low volume wastes and from internal Outfall 004 and is therefore

limited at this outfall. Due to Water Quality Criteria, Hydrazine shall be limited to a daily maximum of 0.077 mg/I.

Monitoring requirements of once per occurrence by grab sample, as in the previous permit, are adopted.

P. Nitrite (NO,)

1. Form 2C value: I mgA (03-21-00)

2. Previous Permit: Not regulated

3. Water Quality Criteria: No Observed Effect Concentration = 4.3 mg/I

4. Drinking Water Standard (MCL): 1000 ugA

5. Conclusion: Due to the NOEC, Nitrite (NO2 ) shall be limited to a daily maximum of 4.3 mg/I at a frequency of
Rationale 

Page 35 of 47 

Permit No. SC0004278 

once per occurrence by grab sample as discussed in our 11-22-93 letter. 

Q. Ethylene Glycol 

1. Form 2C Value: Not a Form 2C application parameter 

2. Previous Permit: 11.9 mg/1 daily average, 23.8 mg/1 daily maximum 

3. Past DMR Data (9/89-8/90): 4.5 mg/1 daily avg., 10 mg/1 daily, max. 

4. Detection Limit: <0.001 mg/I 

5. Conclusion: Ethylene glycol originates from both low volume wastes and from internal Outfall 004. Since the past 

sampling data for Ethylene Glycol indicates there has been no significant impact to the water quality, there will be 

no limit for Ethylene Glycol. , 

Outfall 003 

Description of Discharge: Outfall 003 consists of 0.028 MGD of sanitary sewerage-and motor pool car wash water treated 

via grit removal, screening, comminution, aerated lagoons, stabilization and sedimentation, and chlorination. 

A. Flow 

I. Form 2E Value: (3-21-00) 365 samples 

= 0.0202 MGD average daily value 

= 0.0832 MGD maximum daily value 

2. Previous Permit: Monitor and report 

3. Wasteload Allocation: A flow limit of 0.035 MGD. 

4. Conclusion: Monitoring requirements of once per month by flow indicator, as in the previous permit, are adopted. 

B. Total Residual Chlorine (TRC) 

1. Form 2E Value: (3-21-00) 48 samples 

= <0.05 mg/1 average daily value 

= <0.05 mg/1 maximum daily value 

2. Previous Permit: Not regulated . 

3. Water Quality Criteria'Allowable Effluent Concentration: • 

Aquatic Life Criteria from Reg.61-68 (50 FR 30784, July 29, 1985): 

Monthly Average 0.011 mg/1; Daily Maximum 0.019 mg/1 

4. Detection Limit: 0.05 mg/I 

5. Conclusion: Due to the large amount of mixing with the non-contact cooling water. from Outfall 001, the permit 

will be limited to a monthly average of 0.5 mg/1 and• E. daily maximum of 1.0 mg/I foi Total Residual Chlorine. 

Monitoring shall be conducted once per week by grab sample. - 

C. pH Limitations 

1. Form 2E Value: (3-21-00) 53 samples • 

= 6.6 s.u. minimum, 7.2 s.u. maximum average daily value 

= 6.4 s.u. minimum, 7.8 s.u. maximum maximum daily value 

2. Previous Permit: 6.0 minimum, 9.0 maximum • • 

3. Water Classifications and Standards (Reg.61-68): The pH of the receiving waters shall be maintained between 6.0 

standard units standard units and 8.5 standard units. 

4. Conclusion: As in the previous permit, limits of 6.0 standard units minimum and 9.0 standards units maximum are 

• adopted. Monitoring requirements shall be once per week by grab sample 

D. 5-day Carbonaceous Biochemical Oxygen Demand (CBODD 

1. Form 2E Value: (3-21-00) 16 samples 

= 4.8 mg/1; 0.8 lbs/day average daily value ' 

= 9.4 mg/1; 6.5 lbs/day maximum daily value 

Rationale

Page 35 of 47

Permit No. SC0004278

once per occurrence by grab sample as discussed in out 11-22-93 letter.

Q. Ethylene Glycol

1. Form 2C Value: Not a Form 2C application parameter

2. Previous Permit: 11.9 mg/l daily average, 23.8 mg/ daily maximum

3. Past DMR Data (9/89-8/90): 4.5 mg/i daily avg., 10 mg/l daily max.

4. Detection Limit: <0.00 1 mg/I

5. Conclusion: Ethylene glycol originates from both low volume wastes and from internal Outfall 004. Since the past

sampling data for Ethylene Glycol indicates there has been no significant impact to the water quality, there will be

no limit for Ethylene Glycol.

Outfall 003 i- - -

Description of Discharge: Outfall 003 consists of 0.028 MGD of sanitary sewerage-and motor pool car wash water treated

via grit removal, screening, comminution, aerated lagoons, stabilization and sedimentation, and chlorination.

A. Flow

1. Form 2E Value: (3-21-00) 365 samples

= 0.0202 MGD average daily value

= 0.0832 MGD maximum daily value

2. Previous Permit: Monitor and report

3. Wasteload Allocation: A flow limit of 0.035 MGD.

4. Conclusion: Monitoring requirements of once per month by flow indicator, as in the previous permit, are adopted.

B. Total Residual Chlorine (TRC)

I. Form 2E Value: (3-21-00) 48 samples

= z0.05 mg/l average daily value

= <0.05 mg/I maximum daily value

2. Previous Permit: Notregulated

3. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (50 FR 30784, July 29, 1985):.

Monthly Average 0.011 mg/I; Daily Maximum 0.019 mg/I

4. Detection Limit: 0.05 mg/I

5. Conclusion: Due to the large amount of mixing with the non-contact cooling water from Outfall 001, the permit

will be limited to a monthly average of 0.5 mgA and. a daily maximum of 1.0 mg/I for Total Residual Chlorine.

Monitoring shall be conducted once per week by grab sample.

C. pHLimitations

1. Form 2E Value: (3-21-00) 53 samples .*

= 6.6 s.u. minimum, 7.2 s.u. maximum average daily value

= 6.4 s.u. minimum, 7.8 s.u. maximum maximum daily value

2. Previous Permit: 6.0 minimum, 9.0 maximum

3. Water Classifications and Standards (Reg.61-68): The pH of the receiving waters shall be maintained between 6.0

standard units standard units and 8.5 standard units.

4. Conclusion: As in the previous permit, limits of 6.0 standard units minimum and 9.0 standards units maximum are

adopted. Monitoring requirements shall be once per week by grab sample

D. 5-day Carbonaceous Biochemical Oxygen Demand (CBOD5)

I. Form 2E Value: (3-21 -00) 16 samples

= 4.8 mg/I; 0.8 lbs/day average daily value -

= 9.4 mg/I; 6.5 lbs/day -maximum daily value.
Rationale 

Page 36 of 47 

Permit No. SC0004278 

2. Previous Permit: 25 mg/I daily average, 50 mg/1 daily maximum (CBODs) 

3. Wasteload Allocation: A monthly average BODslimit of 30.0 mg/I (secondary limits). 

4. Detection Limit: <2 mg/I 

5. Conclusion: As requested rather than limiting BOD5, Carbonaceous Biochemical Oxygen Demand (CBOD) will be 

limited using Regulation 61-9 Secondary limits for five (5) day CBOD with a monthly average of 25.0 mg/I and a 

daily maximum of 50.0 mg/I. The sample type shall be a 24 hour composite sample. 

E. Total Suspended Solids (TSS) 

1. Form 2E Value: (3-21-00) 15 samples 

= 8.7 mg/1; 1.5 lbs/day average daily value 

= 20.3 mg/1; 14.1 lbs/day maximum daily value 

2. Previous Permit: 90 mg/1 daily average, 135 mg/1 daily maximum 

3. Detection Limit: <1 mg/1 

4. Conclusion: As in the previous permit, Total Suspended Solids shall be limited to a monthly average of 90 mg/I 

and a daily maximum of 135 mg/I. Monitoring requirements of once per month, are adopted. The sample type is a 

24 hour composite sample. 

F. Fecal Coliform 

1. Form 2E Value: (3-21-00) 15 samples 

= 29/100 ml average daily value 

= 170/100 ml maximum daily value 

2. Previous Permit: 200/100 ml daily average, 400/100 ml daily maximum 

3. Water Classifications and Standards (Reg.61-68): Not to exceed a geometric mean of 200/100 ml, based on a 5 

consecutive samples during any 30 day period; nor shall more than 10% of the total samples during any 30 day 

period exceed 400/100 ml. 

4. Detection Limit: <2/100 ml 

5. Conclusion: Due to the S.C. Water Classifications and Standards (Reg. 61-68), Fecal Coliform shall be limited to 

a monthly average of 200/100 ml and a daily maximum of 400/100 ml. Monitoring requirements of once per 

month by grab sample, as in the previous permit. 

G. Dissolved Oxygen 

1. Form 2E Value: Not a Form 2E application parameter 

2. Previous Permit: a minimum of 1.0 mg/1 

3. Wasteload Allocation: A minimum of 1.0 mg/1 

4. Water Classifications and Standards (Reg.61-68): Daily average not less than 5.0 mg/1 with a low of 4.0 mg/l. 

5. Conclusion: Using the Wasteload Allocation, Dissolved Oxygen shall be limited to a minimum of 1.0 mg/I. The 

monitoring frequency shall be once per month by grab sample. 

H. Phosphorous. total 

1. Form 2E Value: Not a Form 2E application parameter 

2. Previous Permit: Not regulated 

3. Wasteload Allocation: Monitor and Report Results 

4. Conclusion: Using the Wasteload Allocation, Total Phosphorous shall be monitored and the results reported. The 

monitoring frequency shall be once per month by grab sample. 

Outfall 004 

Description of Discharge: Outfall 004 consists of 0.007 MGD of liquid radiological waste treated via filtration, 

demineralization, mixing, oxidation, coagulation and chemical metal cleaning waste. Outfall 004 is ultimately discharged 

via either Outfall 001 or Outfall 002. Applicable effluent guidelines for this facility are the Steam Electric Point Source 

- LI

Rationale

Page 36 of 47

Permit No. SC0004278

2. Previous Permit: 25 mg/I daily average, 50 mg/I daily maximum (CBOD5 )

3. Wasteload Allocation: A monthly average BODs limit of 30.0 mg/l (secondary limits).

4. Detection Limit: <2 mgA/

5. Conclusion: As requested rather than limiting BOD5, Carbonaceous Biochemical Oxygen Demand (CBOD) will be

limited using Regulation 61-9 Secondary limits for five (5) day CBOD with a monthly average of 25.0 mg/I and a

daily maximum of 50.0 mg/I. The sample type shall be a 24 hour composite sample.

E. Total Suspended Solids (TSS)

1. Form 2E Value: (3-21-00) 15 samples

= 8.7 mg/I; 1.5 Ibs/day average daily value

= 20.3 mg/I; 14.1 Ibs/day maximum daily value

2. Previous Permit: 90 mg/i daily average, 135 mg/l daily maximum

3. Detection Limit: <1 mg/l

4. Conclusion: As in the previous permit, Total Suspended Solids shall be limited to a monthly average of 90 mg/l

and a daily maximum of 135 mg/I. Monitoring requirements of once per month, are adopted. The sample type is a

24 hour composite sample.

F. Fecal Coliform

1. Form 2E Value: (3-21 -00) 15 samples

= 29/100 ml average daily value

= 170/100 ml maximum daily value

2. Previous Permit: 200/100 ml daily average, 4001100 ml daily maximum

3. Water Classifications and Standards (Reg.61-68): Not to exceed a geometric mean of 200/100 ml, based on a 5

consecutive samples during any 30 day period; nor shall more than 10% of the total samples during any 30 day

period exceed 400/100 ml.

4. Detection Limit: <2/100 ml

5. Conclusion: Due to the S.C. Water Classifications and Standards (Reg. 61-68), Fecal Coliform shall be limited to

a monthly average of 200/100 ml and a daily maximum of 400/100 ml. Monitoring requirements of once per

month by grab sample, as in the previous permit.

G. Dissolved Oxygen

1. Form 2E Value: Not a Form 2E application parameter

2. Previous Permit: a minimum of 1.0 mg/I

3. Wasteload Allocation: A minimum of 1.0 mg/l

4. Water Classifications and Standards (Reg.61-68): Daily average not less than 5.0 mg/l with a low of 4.0 mg/I.

5. Conclusion: Using the Wasteload Allocation, Dissolved Oxygen shall be limited to a minimum of 1.0 mg/I. The

monitoring frequency shall be once per month by grab sample.

H. Phosphorous, total

I. Form 2E Value: Not a Form 2E application parameter

2. Previous Permnit: Not regulated

3. Wasteload Allocation: Monitor and Report Results

4. Conclusion: Using the Wasteload Allocation, Total Phosphorous shall be monitored and the results reported. The

monitoring frequency shall be once per month by grab sample.

Outfall 004

Description of Discharge: Outfall 004 consists of 0.007 MGD of liquid radiological waste treated via filtration,

demineralization, mixing, oxidation, coagulation and chemical metal cleaning waste. Outfall 004 is ultimately discharged

via either Outfall 001 or Outfall 002. Applicable effluent guidelines for this facility are the Steam Electric Point Source
1.0 1.0 

1.0 1.0 

Rationale 

Page 37 of 47 

Permit No. SC0004278 

Category for existing sources, which provide the following limitations: • 

1. Chemical Metal cleaning wastes shall have the following limitations: 

Parameter Maximum for any Average of daily values 

Copper, total 

Iron, total 

1 day (mg/]) for 30 consecutiv shall not exceed 

A. Flow 

1. Form 2C Value: 0.02 MGD maximum daily value (3-21-00) 

2. Previous Permit: Monitor and Report . • • 

type. 

B. Oil and Grease 

1. Form 2C Value: <5 mg/1 maximum daily value (3-21-00) 

2. Previous Permit: Not regulated 

3. Detection Limit: <5 mg/i 

4. Conclusion: Due to the Part III Special Condition Item V. of the (3-26-84) permit and the levels detected in the 

. • . past sampling, there will be no limit forpil and Grease. 

: • 

C. Total Suspended Solids (TSS) 

1. Form 2C Value: <5 mg/I . maximum, daily value "(3-21-00) 

• 2. Previous Permit: Not regulated • , 

3. Detection Limit: <1 mg/1 

4. Conclusion: Due to the Part III Special Condition Item V. of the (3-26-84)Termit and the levels detected in the 

past sampling, there will be no limit for Total Suspended Solids. 

. . 

D. Copper, total 

1. Form 2C Value: <0.005 mg/1 maximum daily value - (3721-00). 

2. Previous Permit: 1.0 mg/1 monthly average, 1.0 mg/I daily mak. 

3. • Effluent Guidelines:1.0 mg/I monthly average, 1.0 mg/1 daily mai. 

4. Intake Background Levels (10-.1-91)'. 0.006'n1g/1' - • ,1 

5: Water Quality Criteria Allowable Effluent Concentrition: . 

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22,1992): 

Monthly Average = 6.5 ug/l X DF1 = 6.5 ug/l 

Daily Maximum = 9.2 ugh X DF1 = 9.2 ugh 

b. Organoleptic data: = Monthly Average: 1.0 mg/1; Daily Maximum: 

6. Human Health Consideration: 1.0 mg/1 maximum human health standard ' 

7. Detection Limit: 0.01 mg/1 

8. • Conclusion: Due to the effluent guidelines, Copper will be limited to a monthly average and a daily maximum of 

1.0 mg/1. Since this is a internal outfall, there will be no water quality based limit , 

E. Iron total 

1. Form 2C Value: <0.05 mg/1 maximum daily value (3-21-00) 

2. Previous Permit: 1.0 me] monthly average, 1.0 mg/1 daily max. 

, • • 

3. Conclusion: Monitoring requirements of once per occurrence of Chemical metal cleaning by flow estimate sample 

2.0 mg/1 

Rationale

. *. Page 37 of 47

Permit No. SC0004278

Category for existing sources, which provide the following limitations:

1. Chemical Metal cleaning wastes shall have the following limitations:

Parameter Maximum for any Average of daily values

day (mg/A) s efagex cseecymegoys

Copper, total 1.0 1.0

Iron, total 1.0 1.0

A. Flow

1. Form2CValue: 0.02MGDmaximumdailyvalue (3-21-00)

2. Previous Permit: Monitor and Report

3. Conclusion: Monitoring requirements of once per occurrence of chemical metal cleaning by flow estimate sample

type.

B. Oil and Grease

1. Form 2C Value: <5 mg/I maximum daily value (3-21-00)

2. Previous Permit: Not regulated

3. Detection Limit: <5 mg/I

4. Conclusion: Due to the Part m Special Condition Item V. of the (3-26-84) permit and the levels detected in the

past sampling, there will be no limit for Oil and Grease.

C. Total Suspended Solids (TSS)

1. Form 2C Value: <5 mg/I maximum daily value '(3-21 -00)

2. Previous Permit: Not regulated'

3. Detection Limit: <1 mg/I

4. Conclusion: Due to the Part III Special Condition Item V. of the (3-26-84) permit and the levels detected in the

past sampling, there will be no limit for Total Suspended Solids.

D. Copper. total - '

1. Form 2C Value: <0.005 mg/l maximum daily value - (3-21-00)'

2. Previous Permit: 1.0 mg/] monthly average, 1.0 mg/I daily max.'

3. Effluent Guidelines: 1.0 mg/l monthly average, 1.0 mg/i daily max.

4. Intake Background Levels (10-1-91)' 0.006'mg/l .

5: Water Quality Criteria Allowable Effluent Concentration':

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): - [;

Monthly Average = 6.5 ug/l X DF, = 6.5 ug/l

Daily Maximum = 9.2 ug/l X DF1 = 9.2 ug/'

b. Organoleptic data: = Monthly Average:* l.Omg/I; Daily Maximum: 2.0 mg/I

6. Human Health Consideration: 1.0 mg/I maximum human health standard

7. Detection Limit: 0.01 mg/i

8.. Conclusion: Due to the effluent guidelines, Copper will be limited to a monthly average and a daily maximum of

1.0 mg/I. Since this is a internal outfall, there will be no water quality based limit.',

E. Iron, total

1. Form 2C Value: <0.05 mg/I maximum daily value (3-21 -00)

2. Previous Permit: ].0 mg/I monthly average, 1.0 mg/I daily max.
Rationale 

Page 38 of 47 

Permit No. SC0004278 

3. Effluent Guidelines:1.0 mg/1 monthly average, 1.0 mg/1 daily max. 

4. Intake Background levels (10-1-91):-U5 mg/1 

5. Detection Limit: 0.001 mg/1 LAW' 

6. Conclusion: Due to the effluent guidelines, Iron will be limited to a monthly average and a daily maximum of 1.0 

mg/I. Since this is a internal outfall, there will be no water quality based limit. 

F. Zinc, total 

1. Form 2C Value: 0.008 mg/1 maximum daily value (3-21-00) 

= 0.008 mg/1 X 6.2 = 0.0496 mg/1 

2. Previous Permit: Not Regulated 

3. Water Quality Criteria Allowable Effluent Concentration: 

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 59 ug/I X DFI= 59.0 ug/1 

Daily Maximum = 65 ug/1 X DFI= 65.0 ugh 

b. Organoleptic data: = Monthly Average: = 5.0 mg/1 

= Daily Maximum: =10.0 mg/1 

4. Human Health Consideration: 5.0 mg/1 X DF2= 5.0 mg/1 

5. Detection Limit: 0.01 mg/1 

6. Conclusion: Due to the levels indicated on the 2C Form and since this is a internal outfall, there will be no limit for 

Zinc. 

G. Hydrazine 

1. Form 2C Value: Not a Form 2C application parameter 

2. Previous Permit: Not regulated 

3. Water Quality Criteria: 0.077 mg/I Ceriodaphnia dubia chronic toxicity 

3. Detection Limit: 0.005 mg/1 

4. Conclusion: Since the Permittee may discharge liquid radiological wastes via Outfall 001 or 002, hydrazine 

limitations were considered for both of these Outfalls. In a previous permit, a limitation of 11.0 mg/1 was imposed 

on this outfall. Due to the large amount of dilution from the cooling water at Outfall 001, hydrazine will not be 

limited. 

H. Ethylene Glycol 

1. Form 2C Value: Not a Form 2C application parameter 

2. Previous Permit: Not regulated 

3. Past DMR Data (9/89-8/90): 210 mg/1 daily avg., 210 mg/1 daily max. 

4. Detection Limit: <0.001 mg/1 

5. Conclusion: Since the Permittee may discharge liquid radiological wastes via Outfall 001 or 002, ethylene glycol 

limitations were considered for both of these Outfalls. In a previous permit, limitations of 11.9 mg/1 daily average 

and 23.8 mg/1 daily maximum were imposed at Outfall 002. Due to the large amount of dilution from the cooling 

water at Outfall 001, ethylene glycol will not be limited. 

I. Boron 

1. Form 2C Value: 432 mg/I maximum daily value (3-21-00) 

2. Previous Permit: Not regulated 

3. Detection Limit: 0.02 mg/I 

4. Conclusion: Due to the Part III Special Conditions Item U. of the (3-26-84) permit and the levels detected in the 

past sampling, there will be no limit for Boron. 

- U

Rationale

Page 38 of 47

Permit No. SC0004278

3. Effluent Guidelines: 1.0 mg/l monthly average, 1.0 mg/l daily max.

4. Intake Background levels (10-1-91)<-OQ5 mg/i

5. Detection Limit: 0.001 mg/i

6. Conclusion: Due to the effluent guidelines, Iron will be limited to a monthly average and a daily maximum of 1.0

mg/I. Since this is a internal outfall, there will be no water quality based limit.

F. Zinc, total

1. Form 2C Value: 0.008 mg/I maximum daily value (3-21 -00)

= 0.008 mg/l X 6.2 = 0.0496 mg/l

2. Previous Permit: Not Regulated

3. Water Quality Criteria Allowable Effluent Concentration:

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22,1992):

Monthly Average = 59 ug/l X DF, = 59.0 ug/l

Daily Maximum = 65 ug/I X DF, = 65.0 ug/l

b. Organoleptic data: = Monthly Average: = 5.0 mg/I

= Daily Maximum: =10.0 mg/l

4. Human Health Consideration: 5.0 mg/I X DF2 = 5.0 mg/I

5. Detection Limit: 0.01 mg/I

6. Conclusion: Due to the levels indicated on the 2C Form and since this is a internal outfall, there will be no limit for

Zinc.

G. Hvdrazine

1. Form 2C Value: Not a Form 2C application parameter

2. Previous Permit: Not regulated

3. Water Quality Criteria: 0.077 mg/I Ceriodaphnia dubia chronic toxicity

3. Detection Limit: 0.005 mg/I

4. Conclusion: Since the Permittee may discharge liquid radiological wastes via Outfall 001 or 002, hydrazine

limitations were considered for both of these Outfalls. In a previous permit, a limitation of 11.0 mg/I was imposed

on this outfall. Due to the large amount of dilution from the cooling water at Outfall 001, hydrazine will not be

limited.

H. Ethylene Glycol

1. Form 2C Value: Not a Form 2C application parameter

2. Previous Permit: Not regulated

3. Past DMR Data (9/89-8/90): 210 mg/l daily avg., 210 mg/I daily max.

4. Detection Limit: <0.001 mg/I

5. Conclusion: Since the Permittee may discharge liquid radiological wastes via Outfall 001 or 002, ethylene glycol

limitations were considered for both of these Outfalls. In a previous permit, limitations of 11.9 mg/l daily average

and 23.8 mg/l daily maximum were imposed at Outfall 002. Due to the large amount of dilution from the cooling

water at Outfall 001, ethylene glycol will not be limited.

1. Boron

1. Form 2C Value: 432 mg/l maximum daily value (3-21-00)

2. Previous Permit: Not regulated

3. Detection Limit: 0.02 mg/I

4. Conclusion: Due to the Part III Special Conditions Item U. of the (3-26-84) permit and the levels detected in the

past sampling, there will be no limit for Boron.
Rationale 

Page 39 of 4. 7

Permit No. SC0004278 

Outfall 005 

. 

Cooling Tower Blowdown: There are a total of 6 cooling towers employed at the facility (3 cooling towers per nuclear 

unit). Cooling water in a closed cycle mechanical draft system cools the condensers to condense turbine exhaust-gas steam. 

Additives to the cooling tower include sulfuric acid, polyacrylate dispersant to enhance solids deposition; sodium 

hypochlorite, sodium bromide, sodium sulfite or sodium nitrite for dechlorination, and biocides. 

Applicable effluent guidelines for this facility are the Steam Electric Point Source Category for existing sources, which 

provide the following limitations: 

1. The pH of all discharges, except once-through cooling water shall be 

within the range of 6.0 standard units to 9.0 standard units.:, 

2. Cooling tower blowdown shall have the following limitations: 

Parameter Maximum Average 

concentration (mg/I) • concentration (mg/l) 

Free available chlorine 0.5 0.2 

3. Cooling tower blowdown shall have the following limitations: 

Parameter Maximum for any. Average of daily values 

1 day (mg/1) for 30 consecutive days4 

shall not exceed (mg/1) 

The 126 priority no detectable 

pollutants, amount . 

except: 

Chromium, total 0.2 

Zinc, total 1.0 

no detectable 

• amount 

0.2 

1.0 

A. Flow 

1. Form 2C Value: (3-21-00) 47 samples 

= 14.4 MGD long term average value • 

= 14.4 MGD maximum daily average 

2. Previous Permit: Monitor and Report • 

3. Conclusion: Monitoring requirements of continuously by recorder, are adopted. 

B. p13 

1. Form 2C Value: (3-21-00) 48 samples 

= 7.8 s.u. minimum, 8.6 s.u. maximum maximum daily value 

2. Previous Permit: Not regulated 

3. Effluent Guidelines: 6.0 minimum, 9.0 maximum 

4. Water Classifications and Standards (Reg.61-68): The pH of the receiving waters shall be maintained between 6.0 

4For purposes of this permit, 30 day average and monthly average shall be deemed as equivalent. 

Rationale

Page 39 of 47

Permit No. SC0004278

Outfall 005

Cooling Tower Blowdown:There are a total of 6 cooling towers employed at the facility (3 cooling towers per nuclear

unit). Cooling water in a closed cycle mechanical draft system cools the condensers to condense turbine exhaust-gas steam.

Additives to the cooling tower include sulfuric acid, polyacrylate dispersant to enhance solids deposition, sodium

hypochlorite, sodium bromide, sodium sulfite or sodium nitrite for dechlorination, and biocides.;

Applicable effluent guidelines for this facility are the Steam Electric Point Source Category for existing sources, which

provide the following limitations:

1. The pH of all discharges, except once-through cooling water shall be

within the range of 6.0 standard units to 9.0 standard units.-

2. Cooling tower blowdown shall have the following limitations:

'. : 'I _' I .' -

Parameter

concentration (mg/])

Average

concentration (mg/]) -

Free available chlorine 0.5 0.2

3. Cooling tower blowdown shall have the following limitations:

Parameter Maximum for any

I day (mg/l)

Average of daily values

for 30 consecutive days4 .

shall not exceed (mg/i)

The 126 priority no detectable no detectable

pollutants, amount. amount

except:

Chromium, total 0.2 0.2

Zinc, total 1.0 1.0

.(

A. Flow

1. FormK2CValue:(3-21-00) 47 samples

= 14.4 MGD long term average value -

= 14.4 MGD maximum daily average

2. Previous Permnit: Monitor and Report

3. Conclusion: Monitoring requirements of continuously by recorder, are adopted.

B. pH

1. Form2CValue:(3-21-00) 48 samples

7.8 s.u. minimum, 8.6 s.u. maximum maximum daily value

2. Previous Permit: Not regulated

3. Effluent Guidelines: 6.0 minimum, 9.0 maximum

4. Water Classifications and Standards (Reg.61-68): The pH of the receiving waters shall be maintained between 6.0

For purposes of this permit, 30 day average and monthly average shall be deemed as equivalent.
Rationale 

Page 40 of 47 

Permit No. SC0004278. 

standard units standard units and 8.5 standard units. 

5. Conclusion: Since this is an internal outfall, pH limitations are not adopted. PH will be monitored and reported at 

the outfall 001. 

C. Free Available Chlorine (FAC) or Oxidant (FAO) 

1. Form 2C Value: Not provided 

2. Previous Permit: FAC limited to monthly average 0.2 mg/1; daily maximum 0.5 mg/1 

3. Effluent Guidelines: 0.2 mg/1 monthly avg.; 0.5 mg/1 daily max. 

4. Detection Limit: 0.1 mg/1 

5. Conclusion: The effluent guideline permit limits for Free Available Chlorine of 0.2 mg/I monthly average and 0.5 

mg/1 daily maximum are adopted. Monitoring requirements of once per week by multiple grab samples are 

adopted. 

D. Chromium, total 

1. Form 2C Value: Not provided 

2. Previous Permit: Statement prohibiting the use of chromium based maintenance chemicals in the cooling towers. 

3. Effluent Guidelines: 0.2 mg/1 monthly avg.; 0.2 mg/1 daily max. 

4. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 11.0 ug/I X DF1= 11.0 ug/1 

Daily Maximum = 16.0 ug/1 X DF1= 16.0 ug/1 

5. Human Health Consideration: 50 ug/1 X DF2= 50 ug/1 

6. Detection Limit: 0.01 mg/1 

7. Conclusion: As in the previous permit, a statement prohibiting the use of chromium based maintenance chemicals 

in the cooling towers has been placed in the permit. 

E. Zinc total 

1. Form 2C Value: Not provided 

2. Previous Permit: Statement prohibiting the use of zinc based maintenance chemicals in the cooling towers. 

3 Effluent Guidelines: 1.0 mg/1 daily average, 1.0 mg/1 daily maximum 

4. Water Quality Criteria Allowable Effluent Concentration: 

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992): 

Monthly Average = 59 ug/1 X DF1 = 59.0 ug/1 

Daily Maximum = 65 ug/1 X DF1= 65.0 ug/1 

b. Organoleptic data: = Monthly Average: = 5.0 mg/I 

= Daily Maximum: =10.0 mg/I 

5. Human Health Consideration: 5.0 mg/1 maximum human health standard 

6. Detection Limit: 0.01 mg/1 

7. Conclusion: As in the previous permit, a statement prohibiting the use of zinc based maintenance chemicals in the 

cooling towers has been placed in the permit. 

F. Other Priority Pollutants 

1. Form 2C Value: Not detected 

2. Previous Permit: No detectable amount 

3. Effluent Guidelines: No detectable amount monthly average, no detectable amount daily maximum as a result of 

cooling tower maintenance chemicals. 

4. Water Quality Criteria: Varies 

5. Human Health Consideration: Varies 

6. Detection Limit: Varies 

7. Conclusion: Previous permit limitations provided the Permittee with the option to either annually monitor for the 

Rationale

Page 40 of 47

Permit No. SC0004278

standard units standard units and 8.5 standard units.

5. Conclusion: Since this is an internal outfall, pH limitations are not adopted. PH will be monitored and reported at

the outfall 001.

C. Free Available Chlorine (FAC) or Oxidant (FAO)

1. Form 2C Value: Not provided

2. Previous Permit: FAC limited to monthly average 0.2 mg/l; daily maximum 0.5 mg/l

3. Effluent Guidelines: 0.2 mg/l monthly avg.; 0.5 mg/i daily max.

4. Detection Limit: 0.1 mg/l

5. Conclusion: The effluent guideline permit limits for Free Available Chlorine of 0.2 mg/l monthly average and 0.5

mg/I daily maximum are adopted. Monitoring requirements of once per week by multiple grab samples are

adopted.

D. Chromium. total

I. Form 2C Value: Not provided

2. Previous Permit: Statement prohibiting the use of chromium based maintenance chemicals in the cooling towers.

3. Effluent Guidelines: 0.2 mg/l monthly avg.; 0.2 mg/l daily max.

4. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 11.0 ug/l X DF, = 11.0 ug/l

Daily Maximum = 16.0 ug/l X DF, = 16.0 ug/1

5. Human Health Consideration: 50 ug/l X DF2 = 50 ug/l

6. Detection Limit: 0.01 mg/i

7. Conclusion: As in the previous permit, a statement prohibiting the use of chromium based maintenance chemicals

in the cooling towers has been placed in the permit.

E. Zinc, total

I. Form 2C Value: Not provided

2. Previous Permit: Statement prohibiting the use of zinc based maintenance chemicals in the cooling towers.

3 Effluent Guidelines: 1.0 mg/I daily average, 1.0 mg/l daily maximum

4. Water Quality Criteria Allowable Effluent Concentration:

a. Aquatic Life Criteria from Reg.61-68 (57 FR 60848, Dec. 22, 1992):

Monthly Average = 59 ug/l X DF, = 59.0 ug/l

Daily Maximum = 65 ug/l X DF, = 65.0 ug/l

b. Organoleptic data: = Monthly Average: = 5.0 mg/l

= Daily Maximum: =10.0 mg/l

5. Human Health Consideration: 5.0 mg/l maximum human health standard

6. Detection Limit: 0.01 mg/l

7. Conclusion: As in the previous permit, a statement prohibiting the use of zinc based maintenance chemicals in the

cooling towers has been placed in the permit.

F. Other Priority Pollutants

1. Form 2C Value: Not detected

2. Previous Permit: No detectable amount

3. Effluent Guidelines: No detectable amount monthly average, no detectable amount daily maximum as a result of

cooling tower maintenance chemicals.

4. Water Quality Criteria: Varies

5. Human Health Consideration: Varies

6. Detection Limit: Varies

7. Conclusion: Previous permit limitations provided the Permittee with the option to either annually monitor for the
Rationale 

Page 41 of 47 

Permit No. SC0004278 

remaining priority pollutants or provide mass balance calculations to demonstrate that use of particular 

maintenance chemicals (as provided for in the permit application) will not result in detectable amounts of the toxic 

pollutants in the discharge. The previous permit limitations and monitoring requirements are adopted?, 

Outfall 006 • . . . 

Description of Discharge: Outfill 006 is only used intermittently when the Standby Nuclear Service Water Pond is being 

used. The Standby Nuclear Service Water Pond is used as the ultimate -heat sink in the case of a nuclear. accident 

coincident with a loss of Lake Wylie. A polyacrylate solution will be added to the Nuclear Service Water,System to control 

silt deposition. A biocide (sodium hypobromite and/ or sodium hypochlorite) will also be addedto the system to control 

biofouling and under-deposit corrosion.. Sodium bisulfate will be added to dechlorinatethe system prior to discharge via 

Outfall 006. Heat exchanger wet-lay-up chemicals (biocide and Carbohydrazide-, for oxygen could be disCharged to this 

outfall but the occurrence/probability is low. 

1. There shall be no discharge of PCBs. 

2. Once-through cooling water shall have the following limitations: . 

Parameter Maximum 

concentration (mg/1) 

Total Residual Chlorine 0.20 

3. Neither free available nor total residual chlorine may be discharged from any single generating unit for more than two 

hours per day and not more than one unit in any plant may.discharge free available or total residual Chlorine 

simultaneously unless the discharger demonstrates to the permitting authority that discharge for more than two hours is 

required for macro invertebrate control. 

A. Flow • • 

1. Form 2E Value: (3/14/05) 

= 27.4 MGD average daily value 

= 40.3 MGD maximum daily value • 

2. Conclusion: The flow shall be monitored and reported for the monthly average and the daily maximum per 

occurrence, but need not be more than once per week by estimate flow sample type. 

B. Temperature 

1. Form 2E Value: (3/14/05) 

= 57°F average daily value (Winter) 

= 80°F maximum daily value (Winter) 

= 79°F average daily value (Summer) 

= 90°F maximum daily value (Summer) 

2. Water Classifications and Standards (Reg. 61-69): The receiving water temperature may not be increased by more 

than 5°F(2.8°C) above natural conditions or exceed a maximum of 90°F(32.2°C) unless a mixing zone has been 

established or a Section 316(a) determination under the Federal Clean Water Act has been completed.' 

3. Conclusion: The permittee shall monitor and report the temperature of the intake and discharge for the monthly 

average and daily maximum and the delta T for the daily maximum for a periOd of one (1) year, then a report 

summarizing the sample results shall be submitted to the Department to be evaluated and to determine if a thermal 

limit is needed. See Part II1 Special Condition No: 24. 

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Page 41 of 47

Permit No. SC0004278

remaining priority pollutants or provide mass balance calculations to demonstrate that use of particular

maintenance chemicals (as provided for in the permit application) will not result in detectable amounts of the toxic

pollutants in the discharge. The previous permit limitations and monitoring requirements are adopted.,,

Outfall 006

Description of Discharge: Outfall 006 is only used intermittently when the Standby Nuclear Service Water Pond is being

used. The Standby Nuclear Service Water Pond is used as the ultimate heat sink in the case of a nuclear accident

coincident with a loss of Lake Wylie. A polyacrylate solution will be added to the Nuclear Service Water, System to control

silt deposition. A biocide (sodium hypobromite and/ or sodium hypochlorite) will also beadded to the system to control

biofouling and under-deposit corrosion. Sodium bisulfite will be added to dcchlorinate'the system prior to discharge via

Outfall 006. Heat exchanger wet-lay-up chemicals (biocide and Carbohydrazide, for oxygen could be discharged to this

outfall but the occurrence/probability is low.

1. There shall be no discharge of PCBs.

2. Once-through cooling water shall have the following limitations:

Parameter _Maximum ,

concentration (mg/i)

Total Residual Chlorine - 0.20

3. Neither free available nor total residual chlorine may be discharged from any single generating unit for more than two

hours per day and not more than one unit in any plant may discharge free available or total residual chlorine

simultaneously unless the discharger demonstrates to the permitting authority that discharge for more than two hours is

required for macro invertebrate control.

A. Flow

1. Form 2E Value: (3/14/05)

= 27A MGD average daily value

= 40.3 MGD maximum daily value

2. Conclusion: The flow shall be monitored and reported for the monthly average and the daily maximum per

occurrence, but need not be more than once per week by estimate flow sample type.

B. Temperature

1. Form 2E Value: (3/14/05)

= 570F average daily value (Winter)

= 800F maximum daily value , (Winter)

= 790F average daily value (Summer) .

= 900F maximum daily value (Summer)

2. Water Classifications and Standards (Reg. 61-69): The receiving water temperature may not be increased by more

than 50F(2.80C) above natural conditions or exceed a maximum of 900F(32.2'C) unless a mixing zone has been

established or a Section 316(a) determination under the Federal Clean Water Act has been completed.'

3. Conclusion: The permittee shall monitor and report thetemperature of the intake and discharge for the monthly

average and daily maximum and the delta T for the daily maximum for a period of one (1) year, then a report

summarizing the sample results shall be submitted to the Department to be evaluated and to determine if a thermal

limit is needed. See Part m Special Condition No. 24.
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Page 42 of 47 

Permit No. SC0004278 

C. pH Limitations 

1. Form 2E Value: (3/14/05) 

= 6.0 s.u. minimum, 8.0 s.u. maximum 

2. Water Classifications and Standards (Reg.61-68): The pH of the receiving waters shall be maintained between 6.0 

standard units and 8.5 standard units. 

3. Conclusion: Due to the Water Classifications and Standards (Reg.61-68), the pH shall be limited to 6.0 to 9.0 

standard units at a frequency of once per occurrence, but need not be more than once per week by grab sample. 

D. Total Residual Chlorine (RC) 

1. Form 2E Value: (3/14/05) 

= 0 mg/I long term average value 

= 0 mg/1 maximum daily value 

2. Effluent Guidelines: = 0.2 mg/I 

3. Water Quality Criteria Allowable Effluent Concentration: 

Aquatic Life Criteria from Reg.61-68 (50 FR 30784, July 29, 1985): 

Monthly Average = 0.011 mg/1 X DF1= 0.011 mg/I 

Daily Maximum = 0.019 mg/1 X DPI= 0.019 mg/1 

4. Detection Limit: 0.05 mg/1 

5. Conclusion: Since chlorine is used in the cooling tower discharges, Total Residual Chlorine shall be limited to a 

monthly average of 0.011 mg/1 and a daily maximum of 0.019 mg/I, which is based on the Water Classifications 

and Standards (Reg. 61-68) and effluent guidelines values for Total Residual Chlorine at a frequency of once per 

occurrence, but need not be more than once week. Monitoring is not required when chlorine is not being used. 

IV. Chemical Additives 

A. Cooling Water Additives (Outfall 001 and Outfall 002, in some instances) 

Chlorine and Sodium Bromide additives -- Are regulated via Total Residual and Free Available Chlorine limits. 

Biocides -- Previously reported biocides are limited to the No Observable Effect Limitation (NOEL) concentration 

for general fish populations as a daily maximum. 

Dispersants -- Previously reported dispersants are limited to the NOEL concentration for general fish populations 

as a daily maximum. 

Corrosion Inhibitors -- Where not already limited in the permit, previously reported corrosion inhibitors are 

limited to the NOEL concentration for general fish populations as a daily maximum. 

B. Hazardous Materials (Outfalls 001, 002, and 004) 

Acidic and Basic Substances 

Since discharge outfalls have pH limitations, discharges of acids and bases previously reported will be regulated 

via the pH limitations. 

Chlorine Containing Substances 

Outfalls 001, 002, and 003 have chlorine containing substances that are either used during treatment or contained 

in the sources of the wastewater. Limitations for chlorine have been imposed at these Outfalls. 

V. Sludge Disposal 

Sludge disposal at the Catawba site is in accordance with the Sludge Management Plan submitted 12/12/00 and in 

accordance with industrial waste landfill permit No. 463303-1601. The permittee shall obtain prior written 

approval for any sludge disposal activities at this facility. 

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Page 42 of 47

Permit No. SC0004278

C. pH Limitations

1. Form 2E Value: (3/14/05)

= 6.0 s.u. minimum, 8.0 s.u. maximum

2. Water Classifications and Standards (Reg.61-68): The pH of the receiving waters shall be maintained between 6.0

standard units and 8.5 standard units.

3. Conclusion: Due to the Water Classifications and Standards (Reg.61-68), the pH shall be limited to 6.0 to 9.0

standard units at a frequency of once per occurrence, but need not be more than once per week by grab sample.

D. Total Residual Chlorine (TRC

I. Form 2E Value: (3/14/05)

= 0 mg/l long term average value

= 0 mg/l maximum daily value

2. Effluent Guidelines: = 0.2 mg/I

3. Water Quality Criteria Allowable Effluent Concentration:

Aquatic Life Criteria from Reg.61-68 (50 FR 30784, July 29, 1985):

Monthly Average = 0.011 mg/I X DF1 = 0.011 mg/I

Daily Maximum =0.019 mg/ X DF1 = 0.019 mg/I

4. Detection Limit: 0.05 mg/l

5. Conclusion: Since chlorine is used in the cooling tower discharges, Total Residual Chlorine shall be limited to a

monthly average of 0.011 mg/I and a daily maximum of 0.019 mg/I, which is based on the Water Classifications

and Standards (Reg. 61-68) and effluent guidelines values for Total Residual Chlorine at a frequency of once per

occurrence, but need not be more than once week. Monitoring is not required when chlorine is not being used.

IV. Chemical Additives

A. Cooling Water Additives (Outfall 001 and Outfall 002, in some instances)

Chlorine and Sodium Bromide additives -- Are regulated via Total Residual and Free Available Chlorine limits.

Biocides -- Previously reported biocides are limited to the No Observable Effect Limitation (NOEL) concentration

for general fish populations as a daily maximum.

Dispersants -- Previously reported dispersants are limited to the NOEL concentration for general fish populations

as a daily maximum.

Corrosion Inhibitors -- Where not already limited in the permit, previously repcrted corrosion inhibitors are

limited to the NOEL concentration for general fish populations as a daily maximum.

B. Hazardous Materials (Outfalls 001, 002, and 004)

Acidic and Basic Substances

Since discharge outfalls have pH limitations, discharges of acids and bases previously reported will be regulated

via the pH limitations.

Chlorine Containing Substances

Outfalls 001, 002, and 003 have chlorine containing substances that are either used during treatment or contained

in the sources of the wastewater. Limitations for chlorine have been imposed at these Outfalls.

V. Slud2e Disposal

Sludge disposal at the Catawba site is in accordance with the Sludge Management Plan submitted 12/12/00 and in

accordance with industrial waste landfill permit No. 463303-1601. The permittee shall obtain prior written

approval for any sludge disposal activities at this facility.
Y. 

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Page 43 of 47 _ 

Permit No. SC0004278 

VI. Operator . 

. . 

The Pennittee's present treatment system consists of grit semoval, screening, comminution, aerated lagoons, 

stabilization and sedimentation, and chlorinition. The highest classification of the operation of all 'treatment 

equipment is usually used to determine the operator requirement. Based on .•the sanitary treatment system 

classification, an operator with a Grade C-B or higher 'certification is required to accept the responsibility of 

inspections made by lower grade operators. 

VII. Previous Bioloeical Studies 

A. 316(a) • 

Studies of the thermal effects of the discharge were provided in support of the 316(a) variance request. 

Additionally, the Permittee has also conducted dye studies to determine the dispersion characteristics of Outfall 

001 and its dilution with the receiving water. 

B. 316(b) 

In a March 17, 1987 letter, Duke Power Company provided information concerning the intake structures found in 

Lake Wylie and the Station's Standby Nuclear Service Water Pond. In a March 23, 1987.memorandum, it was 

determined that provided the screens are kept clean, the intake should not pose a significant threat to the biological 

integrity of Lake Wylie or the Stindby Nuclear Service Water Pond because of low water velocities. As a result, a 

316(b) study was not required to be performed. • 

VIII. Groundwater Monitoring 

The Permittee shall monitor and report each of the four (4) groundwater monitoring wells semiannually for the 

following parameters: 

Water Level, tenth/feet 

Total Dissolved Solids 

Total Organic Carbon • 

pH (field), standard units 

Specific Conductance (field), umhos/cm 

Ammonia, (NH3) mg/1 

Nitrate, (NO3) 

Sulfate, mg/1 

Arsenic, total, mg/I 

Barium, total, mg/1 

Cadmium, total, mg/1 

Chromium, total, mg/1 

Copper, total, mg/I ,. 

Iron, total, mg/I . 

Lead, total, mg/1 

Manganese, total, mg/1 

Mercury,,total, mg/1 

Selenium, total, mg/1 

Silver, total; mg/I 

Zinc, total, mg/1 

IX. Co-Treatment ' ;!, 

Commingling and co-treatment of discharges were taken into account at Outfall 001 which combines cooling tower 

bloWdovvn," once-through cooling water; liquid radiological wastes, and metal cleaning wastes. Commingling and cotreatment of discharges were taken into account at Outfall 002 which combines low volume Wastewater, miscellaneous 

dilution water, and metal cleaning wastes. Where various wastes are combined for treatment and -disaharge, 40 CFR 

423.15(n) requires that the quantity of each pollutant or pollutant property not exceed the specified limitation for that 

waste source. Applicable guideline concentrations were flow weighted in calculating final effluent 'concentrations. 

X. Toxicity Testing 

Since the chemical specific approach does not address all specific chemicals and, their interactions with other 

components in the waste stream, a more comprehensive testing requirement is needed. TO *ensure that Water Quality 

Standards are not violated, whole effluent toxicity testing is being required at Outfalls 001 and 002. Testing will not 

be required for internal Outfalls or for the sanitary discharge Outfall 003. 

-. Rationale

Page 43 of 47

Permit No. SC0004278

VI. Onerator - ..

The Peznittei's present treatment system consists of grit removal, screening, cornminution, aerated lagoons,

stabilization and sedimentation, and chlorination.' The highest classification of the operation of all treatment

equipment is usually used to determine the operator requirement. Based on the sanitary treatment system

classification, an operator with a Grade C-B or higher'.certification-is required to accept the responsibility of

inspections made by lower grade operators.

VII. Previous Biological Studies -' ,

A. 316(a)

Studies of the thermal effects of the discharge were provided in support of the 316(a) variance request.

Additionally, the Permittee has also conducted dye studies to determine the dispersion characteristics of Outfall

001 and its dilution with the receiving water.

B.316(b) -.

In a March 17, 1987 letter, Duke Power Company provided information concerning the intake structures found in

Lake Wylie and the Station's Standby Nuclear Service Water Pond. In a March 23, 1987.memorandum, it was

determined that provided the screens are kept clean, the intake should not pose a significant threat to the biological

integrity of Lake Wylie or the' Standby Nuclear Service Water Pond because of low water velocities.' As a result, a

316(b) study was not required to be performed.

VIII. Groundwater Monitorine

The Permittee shall monitor and report each of the four (4) groundwater monitoring wells semiannually for the

following parameters:

Water Level, tenth/feet Cadmium, total, mg/l

Total Dissolved Solids Chromium, total, mg/l

Total Organic Carbon Copper, total, mg/l

pH (field), standard units Iron, total, mg/I

Specific Conductance (field), umhos/cm Lead, total, mg/I

Ammonia, (NH3) mg/I Manganese, total, mg/I

Nitrate, (NO3) Mercury,,total, mg/I,

Sulfate, mg/I Selenium, total, mg/I

Arsenic, total, mg/I Silver, total, mg/I;

Barium, total, mg/l Zinc, total, mg/I -

IX. Co-Treatment

Commingling and co-treatment of discharges were taken into account at Outfall 001 which combines cooling tower

blowdown,' once-through cooling wvater, liquid radiological wastes, and metal cleaning wastes. Commingling and cotreatment of discharges were taken into account at Outfall 002 which combines low volume wastewater, miscellaneous

dilution water, and metal cleaning wastes. Where various wastes are combined for treatment and discharge, 40 CFR

423.15(n) requires that the quantity of each pollutant or pollutant property not exceed the specified limitation for that

waste source. Applicable guideline concentrations were flow weighted in calculating final effluent concentrations.

X. Toxicity Testing

Since the chemical specific approach does not address all specific chemicals and their interactions with other

components in the waste stream, a more comprehensive testing requirement is needed. To ensure that Water Quality

Standards are not violated, whole effluent toxicity testing is being required at Outfalls 001 and 002. Testing will not

be required for internal Outfalls or for the sanitary discharge Outfall 003.
Rationale 

Page 44 of 47 

Permit No. SC0004278 

In accordance with policies set out in the South Carolina Department of Health and Environmental Control 

(SCDHEC) Bureau of Water Pollution Control Reasonable Potential Procedures for NPDES Permits, Whole Effluent 

Toxicity (WET) testing is imposed on a discharge based on the reasonable potential of that discharge to cause or 

contribute to a water quality violation. The WET limits are determined based on the instream waste concentration 

(IWC) for aquatic life protection. The IWC is calculated as follows: 

Outfall 001 

IWC = (Effluent flow/(7Q10 flow + Effluent flow)) X 100 

= (85.865/(0 + 85.865)) X 100 

= 100% 

Outfall 002 

IWC = (Effluent flow/7Q10 flow + Effluent flew) X 100 

IWC = 1.41/(0 + 1A1) X 100 

IWC = 100% 

If a diffuser is not installed with an PNC of 100%, then chronic toxicity is required. An IWC of 100% corresponds to 

a chronic test concentration (CTC) of 100% since no mixing zone is present. The test shall be performed using 

Ceriodaphnia dubia as the test organism, unless approval for an alternate species is requested and granted by the 

Department. Toxicity testing limitations have been imposed in this permit as a chronic single dilution whole effluent 

toxicity (pass/fail test) as was in an earlier permit at a CTC of 100%. The toxicity testing monitoring frequency shall 

be once per quarter. The specific chronic toxicity language is included in Part M Special Condition No. 13 of the 

permit. 

4. Water Quality Data: Effluent Limits for pH are established in Reg. 61-68.G. For Class Fresh Water this value is 

standard units. 

XI. PROCEDURES FOR REACHING A FINAL PERMIT DECISION 

A. Comment Period (R.61-9.124.10 and 11) 

The Department of Health and Environmental Control proposes to issue an NPDES permit to this applicant subject 

to the effluent limitations and special conditions outlined in this document. These determinations are tentative. 

During the public comment period, any interested person may submit written comments on the draft permit to the 

following address: 

SC Dept. of Health and Environmental Control 

Industrial, Agricultural and Storm Water Permitting Division 

Bureau of Water 

2600 Bull Street 

Columbia, South Carolina 29201 

- U

Rationale

Page 44 of 47

Permit No. SC0004278

In accordance with policies set out in the South Carolina Department of Health and Environmental Control

(SCDHEC) Bureau of Water Pollution Control Reasonable Potential Procedures for NPDES Pennits, Whole Effluent

Toxicity (WET) testing is imposed on a discharge based on the reasonable potential of that discharge to cause or

contribute to a water quality violation. The WET limits are determined based on the instream waste concentration

(TWC) for aquatic life protection. The IWC is calculated as follows:

Outfall 001

IWC = (Effluent flow/(7Q10 flow + Effluent flow)) X 100

= (85.865/(0 + 85.865)) X 100

= 100%

Outfall 002

IWC = (Effluent flow/7Q10 flow + Effluent flow) X 100

IWC = 1.41/(0+ 1.41)X 100

IWC = 100%

If a diffuser is not installed with an IWC of 100°, then chronic toxicity is required. An IWC of 100% corresponds to

a chronic test concentration (CTC) of 100%vo since no mixing zone is present. The test shall be performed using

Ceriodaphnia dubia as the test organism, unless approval for an alternate species is requested and granted by the

Department. Toxicity testing limitations have been imposed in this permit as a chronic single dilution whole effluent

toxicity (pass/fail test) as was in an earlier permit at a CTC of 100%. The toxicity testing monitoring frequency shall

be once per quarter. The specific chronic toxicity language is included in Part m Special Condition No. 13 of the

permit.

4. Water Quality Data: Effluent Limits for pH are established in Reg. 61-68.G. For Class Fresh Water this value is

standard units.

Xl. PROCEDURES FOR REACHING A FINAL PERMIT DECISION

A. Comment Period (R.61-9.124. 0 and I 1)

The Department of Hcalth and Environmental Control proposes to issue an NPDES permit to this applicant subject

to the effluent limitations and special conditions outlined in this document. These determinations are tentative.

During the public comment period, any interested person may submit written comments on the draft permit to the

following address:

SC Dept. of Health and Environmental Control

Industrial, Agricultural and Storm Water Permitting Division

Bureau of Water

2600 Bull Street

Columbia, South Carolina 29201
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Page 45 of 47 

Permit No. SC0004278 

For additional information, interested persons may contact Timothy M. Eleazer at 803-898-3964. 

• 

All written comments received during.the period beginning November 5, 2003 and ending on December 5, 2003 

shall be considered in making the final decision and shall be answered as prescribed below. See Public Notice 

#15-24-R. • 

Per R.61-9.124.17, the Department is only required to issue a response to comments when a final permit is issued. 

This response shall: 

• 

1. Specify which provisions, if any, of the draft permit have been changed in thcfinalpermit decision, and the 

reasons for the change; and 

2. Briefly describe and respond to all significant comments on the draft perMit raised during the public comment 

period, or during any hearing. 

The response to comments shall be available to the public. 

B. Public Hearings (R.61-9.124.11 and 12) 

During the public comment period, any interested person may request a public hearing, if no hearing has already 

been scheduled. A request for a public hearing shall be in writing and shall state tlie nature 'of the issues proposed 

to be raised in the hearing. . • , . 

Determinations and Scheduling. 

1. Within the thirty (30) day comment period or other applicable comment period provided after . posting or 

publishing of a public notice, an applicant, any affected state or interstate agency, the Regional Administrator 

or any other interested person or agency may file a petition with the Department for a public hearing on an 

application for. a permit. A petition for a public hearing shall indicate the specific reasons why a hearing is 

requested, the existing or proposed discharge identified therein and specifically indicate which portions of the 

application or other permit form or information constitutes necessity for a public hearing. If the Department 

determines that a petition constitutes significant cause or that there is sufficient public interest in an application 

for a public hearing, it may direct the scheduling of a hearing thereon. , 

• . • . 

2. A hearing shall be scheduled not less than four (4) nor more than eight (8) weeks after the Department 

determines the necessity of the hearing in the geographical location of the applicant or, at the discretion of the 

Department; at another appropriate ,location, and • shall be noticed at least thirty (30) days before the hearing. 

The notice of public hearing shall be transmitted .to the applicant and shall be published in at least one (1) 

newspaper of general circulation in the geographical area of the existing or proposed discharge identified on 

the permit application and shall be mailed to,anyperson or group upon _request thereof. NotiCe shall be mailed 

to all persons and governmental agencies, which received a copy of the notice or the fact sheet for the permit 

application. 

• 

5. Public notice of the hearing shall be given in accordance with R.61-9.124.10. 

. • 

3. The Department may hold a single public hearing on related groups of permit applications.. 

•• • I 

4. The Department may also hold a public hearing at its discretion; whenever, for instance, such a hearing might 

clarify one or more issues involved in the permit decision; 

.. Rationale

Page 45 of 47

Permit No. SC0004278

For additional information, interested persons may contact Timothy M. Eleazer at 803-898-3964.

All written comments received during the period beginning November 5, 2003 and ending on December 5, 2003

shall be considered in making the final decision and shall be answered as prescribed below. See Public Notice

#15-24-R.

Per R.61-9.124.17, the Department is only required to issue a response to comments when a final permit is issued.

This response shall:

1. Specify which provisions, if any, of the draft permit have been changed in the finalypermit decision, and the

reasons for the change; and

2. Briefly describe and respond to all significant comments on the draft permit raised during the public co .mment

period, or during any hearing.

The response to comments shall be available to the public.

B. Public Hearings (R.61-9.124.1 I and 12)

During the public comment period, any interested person may request a public hearing, if no hearing has already

been scheduled. A request for a public hearing shall be in writing and shall state the nature'of the issues proposed

to be raised in the hearing. .

Determinations and Scheduling.

1. Within the thirty (30) day comment period or other applicable comment period provided after posting or

publishing of a'public notice, an applicant, any affected state or interstate agency, the Regional Administrator

or any other interested person or agency may file a petition with the Department for a public hearing on an

application for.a permit. A petition for a public hearing shall indicate the specific reasons why a hearing is

requested, the existing or proposed discharge identified therein and specifically ifidicate" which portions of the

application or other permit form or information constitutes necessity for a public hearing. If the Department

determines that a petition constitutes significant cause or that there is sufficient public interest in an application

for a public hearing, it may direct the scheduling of a hearing thereon.'

2. A hearing shall be scheduled not less than four (4) nor .more than eight (8) weeks after the Department

determines the necessity of the hearing in the geographical location of the a'plicant or, at the discretion of the

Department,' at another appropriatelocation, and shall be noticed at least thirty (30) days before the hearing.

The notice of public hearing shall be transmittedlto the applicant and shall be published in at least one (1)

newspaper of general circulation in the geographical area of the existing or proposed discharge identified on

the permit application and shall be mailed to any person or group upon request thereof. Notice shall be mailed

to all persons and governmental agencies, which received a copy of the notice or the fact sheet for the permit

application.

3. The Department may hold a single public hearing on related groups of permit applications.'

4. The Department may also hold a public hearing at its discretion, whenever, for instance, such a hearing might

clarify one or more issues involved in the permit decision;

5. Public notice of the hearing shall be given in accordance with R.61-9.124.10.
Rationale 

Page 46 of 47 

Permit No. SC0004278 

Any person may submit oral or written statements and data concerning the draft permit. Reasonable limits may be 

set upon the time allowed for oral statements, and the submission of statements in writing may be required. The 

public comment period under R.61-9.124.10 shall automatically be extended to the close of any public hearing 

under this section. The hearing officer may also extend the comment period by so stating at the hearing. 

A tape recording or written transcript of the hearing shall be made available to the public. 

C. Obligation to raise issues and provide information during the public comment period. (R61-9.124.13) 

All persons, including applicants, who believe any condition of a draft permit is inappropriate or that the 

Department's tentative decision to deny an application, terminate a permit, or prepare a draft permit is 

inappropriate, must raise all reasonably ascertainable issues and submit all reasonably available arguments 

supporting their position by the close of the public comment period (including any public hearing). No issue shall 

be raised during an appeal by any party that was not submitted to the administrative record as part of the 

preparation and comment on a draft permit, unless good cause is shown for the failure to submit it. Any supporting 

materials which are submitted shall be included in full and may not be incorporated by reference, unless they are 

already part of the administrative record in the same proceeding, or consist of State or Federal statutes and 

regulations, Department and EPA documents of general applicability, or other generally available reference 

materials. Commenters shall make supporting materials not already included in the administrative record available. 

(A comment period longer than 30 days may be necessary to give commenters a reasonable opportunity to comply 

with the requirements of this section. Additional time shall be granted under R.61-9.124.10 to the extent that a 

commenter who requests additional time demonstrates the need for such time). 

D. Issuance and Effective Date of the Permit 

1. After the close of the public comment period on a draft permit, the Department shall issue a final permit 

decision. The Department shall notify the applicant and each person who has submitted written comments or 

requested notice of the final permit decision. This notice shall include reference to the procedures for 

appealing a decision on a permit. For the purposes of this section, a final permit decision means a final 

decision to issue, deny, modify, revoke and reissue, or terminate a permit. 

2. A final permit decision shall become effective 30 days after the service of notice of the decision unless: 

(a) A later effective date is specified in the decision; or 

(b) No comments requested a change in the draft permit, in which case the permit shall become effective on 

the effective date shown in the issued permit. 

3. Issuance or Denial of Permits. An appeal to a final determination of the Department or to a condition of a 

permit issued or the denial of a permit pursuant to the State law and this regulation shall be in accordance with 

and subject to 48-1-200 of the SC Code. 

4. Unless specific circumstances warrant otherwise, the permit will become effective on the first of the month 

following the 15-day appeal period (see E below) or 30-day time required by D.2 above, whichever is longer if 

no request for adjudicatory hearing is filed. If a request for adjudicatory hearing is filed, the permit will 

become effective on the first of the month following resolution of the appeal. 

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Permit No. SC0004278

Any person may submit oral or written statements and data concerning the draft permit. Reasonable limits may be

set upon the time allowed for oral statements, and the submission of statements in writing may be required. The

public comment period under R.61-9.124.10 shall automatically be extended to the close of any public hearing

under this section. The hearing officer may also extend the comment period by so stating at the hearing.

A tape recording or written transcript of the hearing shall be made available to the public.

C. Obligation to raise issues and provide information during the public comment period. (R.61-9.124.13)

All persons, including applicants, who believe any condition of a draft permit is inappropriate or that the

Department's tentative decision to deny an application, terminate a permit, or prepare a draft permit is

inappropriate, must raise all reasonably ascertainable issues and submit all reasonably available arguments

supporting their position by the close of the public comment period (including any public hearing). No issue shall

be raised during an appeal by any party that was not submitted to the administrative record as part of the

preparation and comment on a draft permit, unless good cause is shown for the failure to submit it. Any supporting

materials which are submitted shall be included in full and may not be incorporated by reference, unless they are

already part of the administrative record in the same proceeding, or consist of State or Federal statutes and

regulations, Department and EPA documents of general applicability, or other generally available reference

materials. Commenters shall make supporting materials not already included in the administrative record available.

(A comment period longer than 30 days may be necessary to give comnmenters a reasonable opportunity to comply

with the requirements of this section. Additional time shall be granted under R.61-9.124.10 to the extent that a

commenter who requests additional time demonstrates the need for such time).

D. Issuance anrd Effective Date of the Permit

I. After the close of the public comment period on a draft permit, the Department shall issue a final permit

decision. The Department shall notify the applicant and each person who has submitted written comments or

requested notice of the final permit decision. This notice shall include reference to the procedures for

appealing a decision on a permit. For the purposes of this section, a final permit decision means a final

decision to issue, deny, modify, revoke and reissue, or terminate a permit.

2. A final permit decision shall become effective 30 days after the service of notice of the decision unless:

(a) A later effective date is specified in the decision; or

(b) No comments requested a change in the draft permit, in which case the permit shall become effective on

the effective date shown in the issued permit.

3. Issuance or Denial of Permits. An appeal to a final determination of the Department or to a condition of a

permit issued or the denial of a permit pursuant to the State law and this regulation shall be in accordance with

and subject to 48-1-200 of the SC Code.

4. Unless specific circumstances warrant otherwise, the permit will become effective on the first of the month

following the I 5-day appeal period (see E below) or 30-day time required by D.2 above, whichever is longer if

no request for adjudicatory hearing is filed. If a request for adjudicatory hearing is filed, the permit will

become effective on the first of the month following resolution of the appeal.
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Page 47 of 47 

Permit No. SC0004278 

E. Adjudicator),Hearings 

Any person may submit a request for an administrative adjudicatory hearing •to consider the final permit and its 

conditions. If you wish to request an administrative adjudicatory hearing, you must.doso in accordance with 

Regulation 61-72, Volume 25, S.C. Code of Laws, 1976, as amended, and the Rules of the Administrative Law 

Court (ALC). The request must be filed with the Clerk of the South Carolina Board of Health and Environmental 

Control, 2600 Bull Street, Columbia, South Carolina 29201, within fifteen (15) days following issuance of the 

permit. Service may be effected by personal delivery or by first class mail, but the request must be received by the 

Clerk on or before the fifteenth day. 

The following information, at a minimum, must be included in the request: 

1. the name of the party or parties requesting the hearing and the issue(s).for which the-hearing is requested; 

2. the caption or other information sufficient to identify the permit decision:being appealed; and 

• - . 

3. the relief requested. 

. • 

In addition, the Administrative Law Court requires that . a person requesting a contested case hearing must file a 

copy of the request and a filing fee in the amount of $250.00 with the Administrative Law Court at the following 

address: - 

Clerk, Administrative Law Court 

1205 Pendleton Street, Suite 224 

P.O. Box 11667 

Columbia, SC 29211 

A petition •for review of a decision to issue a new permit stays:all actions for which the permit is a prerequisite. A 

petition for review of a decision to reissue a permit stays the entire permit; the conditions of the expiring/expired 

permit remain in effect until the appeal is resolved. Any party may petition the .ALC to allow all uncontested 

provisions of the permit to be placed into effect. Information pertaining to adjudi6tOry matters may be obtained 

by contacting the Legal Office of .the Department of Health and Environmental Control, 2600 Bull Street, 

Columbia, South Carolina or by calling 803-898-3350. 

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Permit No. SC0004278

E. Adjudicatory Hearings

Any person may submit a request for an administrative adjudicatory hearing to consider the final permit and its

conditions. If you wish to request an administrative adjudicatory hearing, you must.do so in accordance with

Regulation 61-72, Volume 25, S.C. Code of Laws, 1976, as amended, and the Rules of the Administrative Law

Court (ALC). The request must be filed with the Clerk of the South Carolina Board of Health and Environmental

Control, 2600 Bull Street, Columbia, South Carolina 29201, within fifteen (15) days following issuance of the

permit. Service may be effected by personal delivery or by first class mail, but the request must be received by the

Clerk on or before the fifteenth day.

The following information, at a minimum, must be included in the request: -

1. the name of the party or parties requesting the hearing and the issue(s) for which the hearing is requested;

2. the caption or other information sufficient to identify the permit decision being appealed; and

3. the relief requested. -

In addition, the Administrative Law Court requires that a person requesting a contested case hearing must file a

copy of the request and a filing fee in the amount of $250.00 with the Administrative Law Court at the following

address:

Clerk, Administrative Law Court

1205 Pendleton Street, Suite 224

P.O. Box 11667

Columbia, SC 29211

A petition for review of a decision to issue a new permit stays all actions for which the permit is a prerequisite. A

petition for review of a decision to reissue a permit stays the entire permit; the conditions of the expiring/expired

permit remain in effect until the appeal is resolved. Any party may petition the .ALC to allow all uncontested

provisions of the permit to be placed into effect. Information pertaining to adjudicatory matters may be obtained

by contacting the Legal Officie of the Department of Health and Environmental Control, 2600 Bull Street,

Columbia, South Carolina orby calling 803-898-3350.