ML13162A366

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Applicant'S Environmental Report Operating License Renewal Stage, Byron Station, Units 1 and 2. Appendix B
ML13162A366
Person / Time
Site: Byron  Constellation icon.png
Issue date: 05/31/2013
From:
Exelon Generation Co
To:
Office of Nuclear Reactor Regulation
References
Download: ML13162A366 (22)
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Text

Appendix B NPDES Permit Byron Station Environmental Report

This page intentionally blank Byron Station Environmental Report Appendix B - NPDES Permit 2171782-0610 J u l y 15, 2011 Exelon Generation Company, LLC Byron Station 445- North German Church Road Byron, E 61010-9794 Re: Exelon Generation Company, LLC - Byron Station NPDES Permit No. IL00483 13 Modification of NPDES Permit (Without Public Notice)

Mr. Adarns:

The Illinois Environmental Protection Agency received your letters dated January 24,201 1 and February 22, 201 1 concerning the use of OPTISPERSE PWR6600 and the permit corrections. Our fmal determination is to modify the Permit as follows:

The use of OPTISPERSE PWR6600 would not be expected to cause any significant changes in effluent quality, therefore this product has been approved for use as requested.

The page numbers have been corrected.

Special Condition 21 has been corrected.

Enclosed is a copy of the modified Permit. Because the changes made in the Permit were minor, no formal Public Notice of the modification will be issued.

Should you have any questions or comments, please contact Leslie Lowry of my staff at the phone number and address above.

Sincerely, Manager, Permit Section Division of Water Pollution Control

Enclosure:

Modified Permit cc: Rockford Region Records

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! I<,. ' 4 , t r , , , r t !I b."ic,'1 c l f I i 4 ]<Pi$ ,'.'(Ill Byron and Braidwood Stations, Units 1 and 2 Page B-1 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit NPDES Permit No. lL0048313 lllinois Environmental Protection Agency Division of Water Pollution Control 1021 North Grand Avenue East Post Office Box 19276 Springfield, lllinois 62794-9276 NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM Reissued (NPDES) Permit Expiration Date: December 31,2015 Issue Date: January 24,201 1 Effective Date: January 24, 201 1 Modification Date: July 15, 201 1 Name and Address of Permittee: Facility Name and Address:

Exelon Generation Company, LLC Exelon Generation Company, LLC Environmental Department Byron Nuclear Power Station 4300 Winfield Road 4450 North German Church Road Warrenville, lllinois 60555-5701 Byron, lllinois 61010 Ogle County Discharge Number and Name: Receiving Waters:

001 Cooling System Blowdown Rock River A01 Demineralizer Regenerant Waste B01 Sewage Treatment Plant Effluent C01 Wastewater Treatment Plant Effluent DO1 Radwaste Treatment System Effluent E01 Stormwater Runoff Basin FOI Intake Screen Backwash 002 Stormwater Runoff Basin Overflow Woodland Creek 003 East Station Area Runoff Woodland Creek 004 West Station Area Runoff Unnamed Tributary to Rock River In compliance with the provisions of the lllinois Environmental Protection Act, Title 35 of Ill. Adm. Code, Subtitle C andlor Subtitle D, Chapter 1, and the Clean Water Act (CWA), the above-named permittee is hereby authorized to discharge at the above location to the above-named receiving stream in accordance with the standard conditions and attachments herein.

Permittee is not authorized to discharge after the above expiration date. In order to receive authorization to discharge beyond the expiration date, the permittee shall submit the proper application as required by the lllinois Environmental Protection Agency (IEPA) not later than 180 days prior to the expiration date.

Alan Keller. P.E.

Manager, Permit Section

-

Division of Water Pollution Control SAK:LRL:07052102. bah Byron and Braidwood Stations, Units 1 and 2 Page B-2 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 2 Modification Date: jul 15, 201 1 NPDES Permit No. 1L0048313 Effluent Limitations and Monitoring From the modification date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited at all times as follows:

LOAD LIMITS ibslday CONCENTRATION DAF (DMF) LIMITS mall 30 DAY DAILY 30 DAY DAILY SAMPLE PARAMETER AVERAGE MAXIMUM AVERAGE MAXIMUM FREQUENCY SAMPLE TYPE Outfall 001 - Cooling System Blowdown*

(Average Flow = 20.3 MGD)

The discharge consist of:

1. Cooling Tower Blowdown
2. Non-Essential Service Water Blowdown & Strainer Backwash
3. Essential Service Water Blowdown & Strainer Backwash
4. Demineralizer Regenerant Waste (A01)
5. Sewage Treatment Plant Effluent (B01)
6. Wastewater Treatment Plant Effluent (COI)
7. Radwaste Treatment Plant Effluent (D01)
8. Stormwater Runoff Basin (EOI)
9. Intake Screen Backwash
10. Secondary Steam System (Non-Radioactive) Process Water
11. Condenser Drain Discharge
12. Circulating Water Make-Up
13. Miscellaneous Drain Water

- Chiller Condensate

- Fire Protection System Drain Water

- Setvice Water Drains

- Closed Cooling System Drain Water Flow (MGD) See Special Condition 1. Daily Continuous PH See Special Condition 2. 1Week Grab Temperature See Special Condition 3 & 12. Daily Continuous**'**

Total Residual Chlorine/

Total Residual Oxidant** 0.05 1Week Grab Zinc (Total) 0.433 Imeek Grab Daily When 0.027 Grab Discharging Copper (Total)**** 0.071 1Week Grab Chromium (Total) 0.2 IWeek Grab OillGrease 15 20 1Week Grab 126 Priority Pollutants See Special Condition 8 & 15.

Total Suspended Solids See Special Condition 24. Monitor Only Grab

  • - See Special Condition 17.

-

  • " See Special Condition 22.
      • - See Special Condition 13.
        • - See Special Condition 14.
          • -

During periods of inoperability of the inline temperature instrument temperature can be measured once per day.

Byron and Braidwood Stations, Units 1 and 2 Page B-3 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 3 Modification Date: J U y~ 15, 201 I NPDES Permit No. lL0048313 Effluent Limitams and Monitoricg From the modification date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited at all times as follows:

LOAD LIMITS Ibstday CONCENTRATION DAF (DMF) LIMITS mg/I 30 DAY DAILY 30 DAY DAILY SAMPLE SAMPLE PARAMETER AVERAGE MAXIMUM AVERAGE MAXIMUM FREQUENCY TYPE Outfall A01 - Demineralizer Regenerant Waste" (Average Flow = 0.019 MGD)

The discharge consist of:

1. Make-Up Demineralizer Regenerant Waste
2. Condensate Polisher Sump Discharge
3. Make-Up DemineralizerArea Drains
4. Well Water Sand Filter Backwash (Alternative Route)
5. Steam Generators Cleaning Process Waste (Once Every 5 - 10 Years)
6. Temporary Demineralizer Regenerant Waste
7. Secondary Steam System (Non-Radioactive)Discharge (Alternative Route)
8. Reverse Osmosis Waste Flow (MGD) See Special Condition 1. Daily Continuous 8-hour Total Suspended Solids 15 30 'IMonth compositen*

The following metal parameter limitations and monitoring are to apply during steam generator(s) cleaning process periods:

Chromium (Hexavalent) 0.1 0.2 Daily Grab Chromium (Total) 1 2 Daily Grab Copper 0.5 1 Daily Grab Iron (Total) 1 Daily Grab Lead 0.2 0.4 Daily Grab Nickel 1 2 Daily Grab Zinc (Total) 1 2 Daily Grab

  • - See Special Condition 9.

"' - Permittee may follow the sampling procedure identified as Byron Station procedure BCP-300-40 or equivalent for determination of total suspended solids by calculation from individual composites.

Byron and Braidwood Stations, Units 1 and 2 Page B-4 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 4 Modification Date: jui I 5, 201 1 NPDES Permit No. 1L0048313 Effluent Limitations and Monitoring From the modification date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited at all times as follows:

LOAD LIMITS Ibslday CONCENTRATION DAF (DMF) -

LIMITS mqll 30 DAY DAILY 30 DAY DAILY SAMPLE SAMPLE PARAMETER AVERAGE MAXIMUM AVERAGE MAXIMUM FREQUENCY TYPE Outfall 601 - Sewage Treatment Plant Effluent*

(DAF = 0.008 MGD)

Flow (MGD) See Special Condition 1. Daily Continuous pH See Special Condition 2. 2lMonth Grab 24-hour Total Suspended Solids 5.3 10.5 60

'IMonth Composite 60 24-hour Composite

  • - See Special Condition 6.

Byron and Braidwood Stations, Units 1 and 2 Page B-5 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 5 Modification Date: July 15, 201 I NPDES Permit No. 1L0048313 Effluent Limitations and M o n i t o m From the modification date of this permit until the expiration date, the effluent of the following discharge(~)shall be monitored and limited at all times as follows:

LOAD LIMITS Ibstday CONCENTRATION DAF (DMF) LIMITS ma!

30 DAY DAILY 30 DAY DAILY SAMPLE SAMPLE PARAMETER AVERAGE MAXIMUM AVERAGE MAXIMUM FREQUENCY TYPE Outfall C01 - Wastewater Treatment Plant Effluent *

(Average Flow = 0.028 MGD)

The discharge consist of:

1. Turbine Building Floor Drain Sumps**
2. Turbine Building Fire & Oil Sump"
3. Turbine Building Equipment Drainsi*
4. Essential Service Water Drain Sumps**
5. Units 1 & 2 Tendon Tunnel Sumps
6. Reactor Building Roof Drains
7. Auxiliary Boiler Blowdown
8. Units 1 8 2 Diesel Fuel Storage Tank Sumps
9. Wastewater Treatment System Sand Filter Backwash
10. Well Water Sand filter Backwash
11. Steam Generator Cleaning Process Waste (Once Every 5 - 10 Years)
12. Condenser Drain Discharge (Altemative Route)
13. Secondary Steam System (Non-Radioactive) Discharge (Altemative Route)
14. Generic Metal Cleaning Activities
15. Waste Treatment Plant Oil Separator
16. Miscellaneous Non-Contaminated Drain Water

- Chiller Condensate

- Fire Protection System Drain Water

- Service Water Drains

- Closed Cooling System Drain Water Flow (MGD) See Special Condition I. Daily Continuous 24-hour Total Suspended Solids 15 30 Composite The following metal parameter limitations and monitoring are to apply during steam generator(s) cleaning process periods:

Chromium (Hexavalent) 0.1 0.2 Daily Grab Chromium (Total) 1 2 Daily Grab Copper 0.5 1 Daily Grab Iron (Total) 1 Daily Grab Lead 0.2 0.4 Daily Grab Nickel 1 2 Daily Grab Zinc (Total) 1 2 Daily Grab

  • - See Special Condition 6 and Special Condition 9.

-

    • These waste streams may be directed to the radwaste treatment system depending on the results of the process radiation monitors.

Byron and Braidwood Stations, Units 1 and 2 Page B-6 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 6 Modification Date: July 15, 201 I NPDES Permit No. lL0048313 Effluent Limitations and Monitoriry From the modification date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited at all times as follows:

LOAD LIMITS Ibslday CONCENTRATION DAF (DMF) -LIMITS mall 30 DAY DAILY 30 DAY DAILY SAMPLE SAMPLE PARAMETER AVERAGE MAXIMUM AVERAGE MAXIMUM FREQUENCY TYPE Outfall DO1 - Radwaste Treatment System Effluent (Average Flow = 0.022 MGD)

The discharge consist of:

1. Steam Generator Condensate Blowdown
2. Cooling Jacket Blowdown
3. Auxiliary Building Floor Drains
4. Laundry Waste Treatment System Drains
5. Auxiliary Building Equipment Drains
6. Radwaste Demineralizer Filter Backwash
7. Evaporator Wastewater
8. Turbine Building Floor Drain Sumps (Alternative Route)
9. Turbine Building Fire 8 Oil Sump (Alternative Route)
10. Turbine Building Equipment Drains (Alternative Route)
11. Essential Service Water Drain Sumps (Alternative Route)
12. Boron Recycle System Blowdown
13. Condensate Polisher Sump Discharge (Alternative Route)
14. Generic Non-Chemical Metal Cleaning Activities
15. Portable Dernineralizer Discharge
16. Reactor Coolant Letdown
17. Laboratory Drains, Decon Showers, & Sample Sinks
18. Miscellaneous Drain Water

- Chiller Condensate

- Fire Protection System Drain Water

- Service Water Drains

- Closed Cooling System Drain Water Flow (MGD) See Special Condition 1 Daily Continuous Discharge Total Suspended Solids 2JMonth Tank Composite Byron and Braidwood Stations, Units 1 and 2 Page B-7 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 7 Modification Date: July 15, 201 1 NPDES Permit No. lL0048313 Effluent Limitations and Monitoring From the modification date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited at all times as follows:

LOAD LIMITS Ibs/day CONCENTRATION DAF (DMF) LIMITS mq/I 30 DAY DAILY 30 DAY DAILY SAMPLE SAMPLE PARAMETER AVERAGE MAXIMUM AVERAGE MAXIMUM FREQUENCY TYPE Outfall E01 - Stormwater Runoff Basin*

(Average Flow = 0.1 19 MGD)

The discharge consist of:

1. Parking Lot Runoff
2. Transformer Area Runoff
3. Station Area Runoff
4. Turbine Building Fire & Oil Sump
5. Steam Generators Cleaning Process Waste (Once Every 5 - 10 Years)
6. Generic Non-Chemical Metal Cleaning Activities
7. Chiller Condensate
8. Fire Protection System Drains
9. Service Water Drains
10. Closed Cooling System Drain Water Flow (MGD) See Special Condition 1. 2IMonth Continuous The following metal parameters limitations and monitoring are to apply during steam generator(s) cleaning process periods:

Chromium (Hexavalent) 0.1 0.2 Daily Grab Chromium (Total) 1 2 Daily Grab Copper 0.5 1 Daily Grab Iron (Total) 1 Daily Grab Lead 0.2 0.4 Daily Grab Nickel 1 2 Daily Grab Zinc (Total) 1 2 Daily Grab For each week in which a discharge occurs from numbers 4 - 6 listed above to the stormwater runoff basin, outfall E01 shall be monitored and limited for the following additional parameters:

Total Suspended Solids 15 30 1/Week Grab For each week in which a discharge occurs from numbers 8 - 10 listed above to the stormwater runoff basin, outfall E01 shall be monitored and limited for the following additional parameters:

Total Suspended Solids 30 100 1Week Grab

  • - See Special Condition 9 and 17.

Outfall FO1 - Intake Screen Backwash (Intermittent Discharge)

There shall be no Byron intentional and Braidwooddischarge of collected Stations, Units 1debris.

and 2 Page B-8 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 8 Modification Date: July 15, 201 1 NPDES Permit No. 110048313 Effluent Limitations and Monitoring

-

From the modification date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited at all times as follows:

LOAD LIMITS IbsJday CONCENTRATION DAF {DMF) LIMITS m d l 30 DAY DAILY 30 DAY DAILY SAMPLE SAMPLE PARAMETER AVERAGE MAXIMUM AVERAGE MAXIMUM FREQUENCY TYPE Outfall 002 - Stormwater Runoff Basin Overflow*

(Intermittent Discharge)

The discharge consist of:

1. Parking Lot Runoff
2. Transformer Area Runoff
3. Station Area Runoff
4. Turbine Building Fire & Oil Sump
5. Steam Generator Cleaning Process Waste (Once Every 5 - 10 Years)
6. Generic Non-Chemical Metal Cleaning Activities
7. Chiller Condensate
8. Fire Protection System Drain Water
9. Service Water Drains
10. Closed Cooling System Drain Water Measure When See Special Condition 1.

Flow (MGD) Discharging Estimate 1tDav When OiltGrease 15 20 Dscharging Grab The following metal parameters limitations and monitoring are to apply during steam generator(s) cleaning process periods:

Chromium (Hexavalent) 0.01 1 0.016 Daily Grab Chromium (Total) 1 2 Daily Grab Copper 0.025 0.041 Daily Grab Iron (Total) 1 Daily Grab Lead 0.063 0.298 Daily Grab Nickel 0.011 0.176 Daily Grab Zinc (Total) 0.047 0.26 Daily Grab For each week in which a discharge occurs from numbers 4 - 6 listed above to the stormwater runoff basin, outfall 002 shall be monitored and limited for the following parameters:

Total Suspended Solids 15 30 1NVeek Grab For each week in which a discharge occurs from numbers 8 - 10 listed above to the stormwater runoff basin, outfall 002 shall be monitored and limited for the following parameters:

Total Suspended Solids 30 100 1Mleek Grab

Byron Station Environmental Report Appendix B - NPDES Permit Page 9 Modification Date: July IS, 201 1 NPDES Permit No. 1L0048313 Effluent Limitations and Monitoring From the modification date of this permit until the expiration date, the effluent of the following discharge(s) shall be monitored and limited at all times as follows:

LOAD LIMITS Ibs/day CONCENTRATION

!2A%..@-?L?Fd LIMITS mqll 30 DAY DAILY 30 DAY DAILY SAMPLE SAMPLE PARAMETER AVERAGE MAXIMUM AVERAGE MAXIMUM FREQUENCY TYPE Outfall 003 - East Station Area Runoff (Intermittent Discharge)

  • - See Special Condition 16.

Outfall 004 -West Station Area Runoff (Intermittent Discharge)

  • - See Special Condition 16.

Byron and Braidwood Stations, Units 1 and 2 Page B-10 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 10 Modification Date: J u l y 15, 201 I NPDES Permit No. lL0048313 S~ecialConditions SPECIAL CONDlTlON 1. Flow shall be measured in units of Million Gallons per Day (MGD) and reported as a monthly average and a daily maximum on the monthly Discharge Monitoring Report.

SPECIAL CONDlTlON 2. The pH shall be in the range 6.0 to 9.0. The monthly minimum and monthly maximum values shall be reported on the DMR form.

SPECIAL CONDITION 3. This facility meets the allowed mixing criteria for thermal discharges pursuant to 35 IAC 302.102. No reasonable potential exists for the discharge to exceed thermal water quality standards. This determination is based on a maximum temperature of 120°F. The permittee shall monitor the flow and temperature of the discharge prior to entry into the receiving water body. Monitoring results shall be reported on the monthly Discharge Monitoring Report. This permit may be modified to include formal temperature limitations should the results of the monitoring show that there is reasonable potential to exceed a thermal water quality standard. Modificationof this permit shall follow public notice and opportunity for comment.

There shall be no abnormal temperature changes that may adversely affect aquatic life unless caused by natural conditions. The normal daily and seasonal temperature fluctuations which existed before the addition of heat due to other than natural causes shall be maintained.

The monthly maximum value shall be reported on the DMR form SPECIAL CONDlTlON 4. The Permitteeshall record monitoring results on Discharge Monitoring Report (DMR) Forms using one such form for each outfall each month.

In the event that an outfall does not discharge during a monthly reporting period, the DMR form shall be submitted with no discharge indicated.

The Permittee may choose to submit electronic DMRs (eDMRs) instead of mailing paper DMRs to the IEPA. More information, including registration information for the eDMR program, can be obtained on the IEPA website, htt~://~~~.epa.state.il.us/water/edrnr/index.html.

The completed Discharge Monitoring Report forms shall be submitted to IEPA no later than the 28" day of the following month, unless otherwise specified by the permitting authority.

Permittees not using eDMRs shall mail Discharge Monitoring Reports with an original signature to the IEPA at the following address:

Illinois Environmental Protection Agency Division of Water Pollution Control Attention: Compliance Assurance Section, Mail Code # I 9 1021 North Grand Avenue East Post Office Box 19276 Springfield, Illinois 62794-9276 SPECIAL CONDITION 5. Samples taken in compliance with the effluent monitoring requirements shall be taken at a point representative of the discharge, but prior to entry into the receiving stream.

SPECIAL CONDITION 6. The use or operation of this facility shall be by or under the supervision of a Certified Class K operator.

SPECIAL CONDlTlON 7. If an applicable effluent standard or limitation is promulgated under Sections 301(b)(2)(c) and (d), 304(b)(2),

and 307(a)(2) of the Clean Water Act and that effluent standard or limitation is more stringent than any effluent limitation in the permit or controls a pollutant not limited in the NPDES Permit, the Agency shall revise or modify the permit in accordance with the more stringent standard or prohibition and shall so notify the permittee.

- - CONDITION 8.

SPECIAL This permit authorizes the use of water treatment additives that were requested as part of this renewal. The use of any new additives, or change in those previously approved by the Agency, or if the permittee increases the feed rate or quantity of the additives used beyond what has been approved by the Agency, the permittee shall request a modification of this permit in accordance with the Standard Conditions -Attachment H. In connection with any such modification, the permittee must also submit a new letter to the Agency certifying that the facility is not using any additives containing any of the 126 priority pollutants.

The permittee shall submit to the Agency on a yearly basis a report summarizing their efforts with water treatment suppliers to find a suitable alternative to phosphorus based additives.

SPECIAL CONDITION 9. The samples taken in compliance with the steam generator(s) cleaning process monitoring requirements shall be taken at a point representative of the discharge, but prior to mixing with any other wastewater and stormwater runoff. If the permittee requires further treatment within the station's wastewater treatment system in order to comply with limits, the steam Byron and Braidwood Stations, Units 1 and 2 Page B-11 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page I I Modification Date: J u l y 15, 201 1 NPDES Permit No. lL0048313 Special Conditions generator(s) cleaning wastes shall not be co-treated with other wastewater (except for incidental amounts) unless this permit has been modified to allow for such co-treatment.

SPECIAL CONDITION. There shall be no discharge of polychlorinated biphenyl compounds.

SPECIAL CONDITION 11. The "Upset" defense provisions listed under 40 CFR 122.41(n) are hereby incorporated by reference.

SPECIAL CONDITION 12. In the event that the Rock River is less than 2,400 cfs andlor the temperature differential between the main river temperatures and the water quality standard is less than 3'F, daily calculations will be undertaken to demonstrate compliance with the water quality standard. Calculations shall be based upon hourly measurements, averaged over a 24-hour calendar day for river flow, main river temperature (measured as Circ Water Makeup Temperature), blowdown flow, and blowdown temperature values. In the event that a data or points are unavailable due to technical issues, the missing value shall be estimated. Results of the calculations shall be reported with the DMR on a monthly basis.

SPECIAL CONDITION 13. Outfall 001 shall be monitored for hydrazine when there is a discharge of the steam generator chemical cleaning solution and associated rinses containing hydrazine into the cooling water system. On those occasions monitoring shall be performed at outfall 001 on a daily basis using a minimum of three grab samples taken at periodic intervals during the discharge of steam generator chemical cleaning solution and associated rinses containing hydrazine. Sample collection and analysis procedures shall be in accordance with station practice for measuring hydrazine and standard methods. The quantity of hydrazine discharged in steam generator chemical cleaning solution and associated rinses to the cooling water system, the duration of this discharge to the cooling water system, and the analytical results shall be submitted with the monthly Discharge Monitoring Report. The permittee shall submit a letter to the Agency requesting a modification to this permit, if the use of hydrazine during normal steam generator lay-up is at a higher feed rate or quantity than what has been previously approved by the Agency.

SPECIAL CONDlTlON 14. Copper monitoring of outfall 001 shall be performed during periods when the station's copper ion system is being utilized for Zebra Mussel infestation control. In addition to monitoring the discharge from outfall 001 for copper (Total) the permittee shall measure the total mass of copper used during Zebra Mussel dosing and include that value with the Discharge Monitoring Report filed the month following the cessation of copper ion system discharge. This permit must be modified to accommodate use of the copper ion system for purposes other than Zebra Mussel control.

SPECIAL CONDlTlON 15. The discharge of 126 priority pollutants except for chromium and zinc (40 CFR 423, Appendix A) is prohibited in detectable amounts from cooling tower discharges if the pollutants come from cooling tower maintenance chemicals.

SPECIAL CONDITION 16.

STORM WATER POLLUTION PREVENTION PLAN (SWPPP) - for outfalls 003 8 004 A. A storm water pollution prevention plan shall be maintained by the permittee for the storm water associated with industrial activity at this facility. The plan shall identify potential sources of pollution which may be expected to affect the quality of storm water discharges associated with the industrial activity at the facility. In addition, the plan shall describe and ensure the implementation of practices which are to be used to reduce the pollutants in storm water discharges associated with industrial activity at the facility and to assure compliance with the terms and conditions of this permit.

B. The owner or operator of the facility shall make a copy of the plan available to the Agency at any reasonable time upon request.

C. The permittee may be notified by the Agency at any time that the plan does not meet the requirements of this condition. After such notification, the permittee shall make changes to the plan and shall submit a written certification that the requested changes have been made. Unless otherwise provided, the permittee shall have 30 days after such notification to make the changes.

D. The discharger shall amend the plan whenever there is a change in construction, operation, or maintenance which may affect the discharge of significant quantities of pollutants to the waters of the State or if a facility inspection required by paragraph G of this condition indicates that an amendment is needed. The plan should also be amended if the discharger is in violation of any conditions of this permit, or has not achieved the general objective of controlling pollutants in storm water discharges.

Amendments to the plan shall be made within the shortest reasonable period of time, and shall be provided to the Agency for review upon request.

E. The plan shall provide a description of potential sources which may be expected to add significant quantities of pollutants to storm water discharges, or which may result in non-storm water discharges from storm water outfalls at the facility. The plan shall include, at a minimum, the following items:

Byron and Braidwood Stations, Units 1 and 2 Page B-12 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 12 Modification Date: July 15, 201 I NPDES Permit No. lL0048313 a e c i a l Conditions A topographic map extending one-quarter mile beyond the property boundaries of the facility, showing: the facility, surface water bodies, wells (including injection wells), seepage pits, infiltration ponds, and the discharge points where the facility's storm water discharges to a municipal storm drain system or other water body. The requirements of this paragraph may be included on the site map if appropriate.

A site map showing:

I. The storm water conveyance and discharge structures; ii. An outline of the storm water drainage areas for each storm water discharge point; iii. Paved areas and buildings; iv. Areas used for outdoor manufacturing, storage, or disposal of significant materials, including activities that generate significant quantities of dust or particulates.

v. Location of existing storm water structural control measures (dikes, coverings, detention facilities, etc.);

vi. Surface water locations andlor municipal storm drain locations vii. Areas of existing and potential soil erosion; viii. Vehicle service areas:

ix. Material loading, unloading, and access areas.

A narrative description of the following:

I. The nature of the industrial activities conducted at the site, including a description of significant materials that are treated, stored or disposed of in a manner to allow exposure to storm water; ii. Materials, equipment, and vehicle management practices employed to minimize contact of significant materials with storm water discharges; iii. Existing structural and non-structural control measures to reduce pollutants in storm water discharges; iv, Industrial storm water discharge treatment facilities;

v. Methods of onsite storage and disposal of significant materials;
4. A list of the types of pollutants that have a reasonable potential to be present in storm water discharges in significant quantities.
5. An estimate of the size of the facility in acres or square feet, and the percent of the facility that has impervious areas such as pavement or buildings.
6. A summary of existing sampling data describing pollutants in storm water discharges.

F. The plan shall describe the storm water management controls which will be implemented by the facility. The appropriate controls shall reflect identified existing and potential sources of pollutants at the facility. The description of the storm water management controls shall include:

1. Storm Water Pollution Prevention Personnel - Identification by job titles of the individuals who are responsible for developing, implementing, and revising the plan.
2. Preventive Maintenance - Procedures for inspection and maintenance of storm water conveyance system devices such as oillwater separators, catch basins, etc., and inspection and testing of plant equipment and systems that could fail and result in discharges of pollutants to storm water.
3. Good Housekeeping - Good housekeeping requires the maintenance of clean, orderly facility areas that discharge storm water. Material handling areas shall be inspected and cleaned to reduce the potential for pollutants to enter the storm water conveyance system.

Byron and Braidwood Stations, Units 1 and 2 Page B-13 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 13 ModificationDate: ~ u l y15, 201 1 NPDES Permit No. lL0048313 Special Conditions

4. -

Spill Prevention and Response Identification of areas where significant materials can spill into or otherwise enter the storm water conveyance systems and their accompanying drainage points. Specific material handling procedures, storage requirements, spill clean up equipment and procedures should be identified, as appropriate. lntemal notification procedures for spills of significant materials should be established.

-

Storm Water Management Practices Storm water management practices are practices other than those which control the source of pollutants. They include measures such as installing oil and grit separators, diverting storm water into retention basins, etc. Based on assessment of the potential of various sources to contribute pollutants, measures to remove pollutants from storm water discharge shall be implemented. In developing the plan, the following management practices shall be considered:

I. Containment - Storage within berms or other secondary containment devices to prevent leaks and spills from entering storm water runoff; ii. -

Oil & Grease Separation Oil/water separators, booms, skimmers or other methods to minimize oil contaminated storm water discharges; iii. Debris & Sediment Control - Screens, booms, sediment ponds or other methods to reduce debris and sediment in storm water discharges; iv. -

Waste Chemical Disposal Waste chemicals such as antifreeze, degreasers and used oils shall be recycled or disposed of in an approved manner and in a way which prevents them from entering storm water discharges.

v. Storm Water Diversion -Storm water diversion away from materials manufacturing, storage and other areas of potential storm water contamination; vi. -

Covered Storage or ManufacturingAreas Covered fueling operations, materials manufacturingand storage areas to prevent contact with storm water.

6. Sediment and Erosion Prevention - The plan shall identify areas which due to topography, activities, or other factors, have a high potential for significant soil erosion and describe measures to limit erosion.
7. Employee Training - Employee training programs shall inform personnel at all levels of responsibility of the components and goals of the storm water pollution control plan. Training should address topics such as spill response, good housekeeping and material management practices. The plan shall identify periodic dates for such training.
8. -

Inspection Procedures Qualified plant personnel shall be identified to inspect designated equipment and plant areas. A tracking or follow-up procedure shall be used to ensure appropriate response has been taken in response to an inspection. Inspections and maintenance activities shall be documented and recorded.

G. The permittee shall conduct an annual facility inspection to verify that all elements of the plan, including the site map, potential pollutant sources, and structural and non-structural controls to reduce pollutants in industrial storm water discharges are accurate. Observations that require a response and the appropriate response to the observation shall be retained as part of the plan. Records documenting significant observations made during the site inspection shall be submitted to the Agency in accordance with the reporting requirements of this permit.

H. This plan should briefly describe the appropriate elements of other program requirements, inchding Spill Prevention Control and Countermeasures (SPCC) plans required under Section 311 of the CWA and the regulations promulgated thereunder, and Best Management Programs under 40 CFR 125.100.

I. The plan is considered a report that shall be available to the public under Section 308(b) of the CWA. The permittee may claim portions of the plan as confidential business information, including any portion describing facility security measures.

J. The plan shall include the signature and title of the person responsible for preparation of the plan and include the date of initial preparation and each amendment thereto.

Construction Authorization K. Authorization is hereby granted to construct treatment works and related equipment that may be required by the Storm Water Pollution Prevention Plan developed pursuant to this permit.

Byron and Braidwood Stations, Units 1 and 2 Page B-14 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 14 Modification Date: J u l y 15, 201 1 NPDES Permit No. 1L0048313 Special Conditions This Authorization is issued subject to the following condition(s).

1. If any statement or representation is found to be incorrect, this authorization may be revoked and the permittee there upon waives all rights thereunder.
2. The issuance of this authorization (a) does not release the permittee from any liability for damage to persons or property caused by or resulting from the installation, maintenance or operation of the proposed facilities; (b) does not take into consideration the structural stability of any units or part of this project; and (c) does not release the permittee from compliance with other applicable statutes of the State of Illinois, or other applicable local law, regulations or ordinances.
3. Plans and specifications of all treatment equipment being included as part of the stormwater management practice shall be included in the SWPPP.
4. Construction activities which result from treatment equipment installation, including clearing, grading and excavation activities which result in the disturbance of one acre or more of land area, are not covered by this authorization. The permittee shall contact the IEPA regarding the required permit(s).

REPORTING L. The facility shall submit an annual inspection report to the Illinois Environmental Protection Agency. The report shall include results of the annual facility inspection which is required by Part G of the Storm Water Pollution Prevention Plan of this permit.

The report shall also include documentation of any event (spill, treatment unit malfunction, etc.) which would require an inspection, results of the inspection, and any subsequent corrective maintenance activity. The report shall be completed and signed by the authorized facility employee(s) who conducted the inspection(s).

M. The first report shall contain information gathered during the one year time period beginning with the effective date of coverage under this permit and shall be submitted no later than 60 days after this one year period has expired. Each subsequent report shall contain the previous year's information and shall be submitted no later than one year after the previous year's report was due.

N. Annual inspection reports shall be mailed to the following address:

Illinois Environmental Protection Agency Bureau of Water Compliance Assurance Section Annual Inspection Report 1021 North Grand Avenue East Post Office Box 19276 Springfield, lllinois 62794-9276

0. If the facility performs inspections more frequently than required by this permit, the results shall be included as additional information in the annual report.

SPECIAL CONDITION 17. The Agency has determined that the effluent limitations in this permit constitute BATlBCT for storm water which is treated in the existing treatment facilities for purposes of this permit reissuance, and no pollution prevention plan will be required for such storm water. In addition to the chemical specific monitoring required elsewhere in this permit, the permittee shall conduct an annual inspection of the facility site to identify areas contributing to a storm water discharge associated with industrial activity, and determine whether any facility modifications have occurred which result in previously-treated storm water discharges no longer receiving treatment. If any such discharges are identified the permittee shall request a modification of this permit within 30 days after the inspection. Records of the annual inspection shall be retained by the permittee for the term of this permit and be made available to the Agency on request.

SPECIAL

---. - CONDITION

-- 18. Discharge of chemical metal cleaning agents EDTA, Elimin-Ox andlor hydrazine, and associated rinses are allowed once every 5 - 10 years per unit at outfalls A01, C01, and E01.

-

SPECIAL CONDITION 19. Except as allowed in Special Condition No. 18 of this permit, there shall be no discharge of complexed metal bearing waste streams or associated rinses from chemical metal cleaning unless this permit has been modified to include the new discharge.

SPECIAL CONDITIONSO. Exelon Generation Company's demonstration for the Byron Nuclear Power Station in accordance with Section 316(b) of the Clean Water Act was approved by IEPA by a letter dated May 15, 1989. It is determined that no additional intake monitoring or modification is being required for reissuance of this NPDES Permit.

Byron and Braidwood Stations, Units 1 and 2 Page B-15 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 15 Modification Date: July 15, 201 1 NPDES Permit No. lL0048313 Special Conditions SPECIAL CONDITION 21. Exelon Generation Company's Byron Nuclear Power Station has been deemed to have met the applicable national performance standards and will not be required to demonstrate further that the Rock River Intake Structure meets the specified impingement mortality and entrainment performance standards pursuant to 40 CFR 125,94(a)(l)(i). This determination was made because of the use and operation of the cooling towers. The Permittee shall request and receive a modification to this permit prior to changing the use or operation of the cooling towers. This determination does not relieve the Permittee of submitting pertinent information regarding the Rock River intake structure and cooling towers operation with the renewal application for this permit as required under 40 CFR 122.21(r)(2), (3). and (5).

SPECIAL CONDITION 22. All samples for Total Residual Chlorinerrotal Residual Oxidant shall be analyzed by an applicable method contained in 40 CFR 136, equivalent in accuracy to low-level amperometric titration. Any analytical variability of the method used shall be considered when determining the accuracy and precision of the results obtained.

Discharge Monitoring Reports shall indicate whether chlorine or bromine compounds were used during the month.

SPECIAL CONDITION 23. For copper, zinc, and hydrazine a zone of initial dilution (ZID) is recognized with dimensions of 15.6 feet across the width of the river from the end-of-pipe and 15.5 feet downstream from this point. Within the ZID, 1.42:l dilution is afforded.

A mixing zone is recognized with dimensions extending 148 feet across the width of the river and 229 feet downstream. Within the mixing zone 6.1:l dilution is afforded.

SPECIAL CONDITION 24. The influent from the Rock River and effluent from Outfall 001 shall be monitored for Total Suspended Solids on a monthly basis for two years from the effective date of this permit. After collection of all required samples, and upon written notificationto the Agency the sampling may cease, unless the Agency modifies the permit to require continued sampling at some frequency.

Byron and Braidwood Stations, Units 1 and 2 Page B-16 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Attachment H 8-Hour Composite Sample means a combination of at least 3 sample aliquots of at least 100 milliliters, collected at periodic Standard Conditions intervals during the operating hours of a facility over an 8-hour period.

Definitions Flow Proportlonal Composite Sample means a combination of Act means the Illinois Environmental Protection Act, 415 ILCS 5 as sample aliquots of at least 100 milliliters collected at periodic Amended. intervals such that either the time interval between each aliquot or the volume of each aliquot is proportional to either the stream flow Agency means the Illinois Environmental ProtectionAgency. at the time of sampling or the total stream flow since the collection of the previous aliquot.

Board means the Illinois Pollution Control Board.

(1) Duty to comply. The permittee must comply with all Clean Water Act (formerly referred to as the Federal Water conditions of this permit. Any permit noncompliance Pollution Control Act) means Pub. L 92-500, as amended. 33 constitutes a violation of the Act and is grounds for U.S.C. 1251 et seq. enforcement action, permit termination, revocation and reissuance, modification, or for denial of a perrnit renewal NPDES (National Pollutant Discharge Elimination System) means application. The permittee shall comply with effluent standards the national program for issuing, modifying, revoking and reissuing, or prohibitions established under Section 307(a) of the Clean terminating, monitoring and enforcing permits, and imposing and Water Act for toxic pollutants within the time provided in the enforcing pretreatment requirements, under Sections 307, 402, 318 regulations that establish these standards or prohibitions, even and 405 of the Clean Water Act. if the permit has not yet been modified to incorporate the requirements.

USEPA means the United States Environmental Protection Agency.

(2) Duty to reapply. If the permitteewishes to continue an activity Daily Dlscharge means the discharge of a pollutant measured regulated by this permit after the expiration date of this permit, during a calendar day or any 24-hour period that reasonably the permittee must apply for and obtain a new permit. If the represents the calendar day for purposes of sampling. For permittee submits a proper application as required by the pollutants with limitations expressed in units of mass, the "daily Agency no later than 180 days prior to the expiration date, this discharge" is calculated as the total mass of the pollutant permit shall continue in full force and effect until the final discharged over the day. For pollutants with limitations expressed Agency decision on the application has been made.

in other units of measurements, the "daily discharge" is calculated as the average measurement of the pollutant over the day. (3) Need to halt or reduce activity not a defense. It shall not be a defense for a permittee in an enforcement action that it would Maximum Dally Discharge Limitation (daily maximum) means the have been necessary to halt or reduce the permitted activity in highest allowable daily discharge. order to maintain compliance with the conditions of this permit.

Average Monthly Discharge Limitation (30 day average) means (4) Duty to mitigate. The permittee shall take all reasonable the highest allowable average of daily discharges over a calendar steps to minimize or prevent any discharge in violation of this month, calculated as the sum of all daily discharges measured permit which has a reasonable likelihood of adversely affecting during a calendar month divided by the number of daily discharges human health or the environment.

measuredduring that month.

(5) Proper operation and maintenance. The permittee shall at Average Weekly Discharge Limitation (7 day average) means the all times properly operate and maintain all facilities and highest allowable average of daily discharges over a calendar systems of treatment and control (and related appurtenances) week, calculated as the sum of all daily discharges measured which are installed or used by the permittee to achieve during a calendar week divided by the number of daily discharges compliance with conditions of this permit. Proper operation measuredduring that week. and malntenance includes effective performance, adequate funding, adequate operator staffing and training, and adequate Best Management Practices (BMPs) means schedules of laboratory and process controls, including appropriate quality activities, prohibitions of practices, maintenance procedures, and assurance procedures. This provision requires the operation of other management practices to prevent or reduce the pollution of back-up, or auxiliary facilities, or similar systems only when waters of the State. BMPs also include treatment requirements, necessary to achieve compliance with the conditions of the operating procedures, and practices to control plant site runoff, permit.

spillage or leaks, sludge or waste disposal, or drainage from raw material storage. (6) Permit actions. This permit may be modified, revoked and reissued, or terminated for cause by the Agency pursuant to 40 Aliquot means a sample of specified volume used to make up a CFR 122.62 and 40 CFR 122.63. The filing of a request by the total composite sample. permittee for a permit modification, revocation and reissuance, or termination, or a notification of planned changes or Grab Sample means an individual sample of at least 100 milliliters anticipated noncompliance, does not stay any permit condition.

collected at a randomly-selected time over a period not exceeding 15 minutes. (7) Property rights. This permit does not convey any property rights of any sort, or any exclusive privilege.

24-Hour Composite Sample means a combination of at least 8 sample aliquots of at least 100 milliliters, collected at periodic (8) Duty to provide information. The permittee shall furnish to intervals during the operating hours of a facility over a 24-hour the Agency within a reasonable time, any information which the period. Agency may request to determine whether cause exists for modifying, revoking and reissuing, or terminating this permit, or to determine compliance with the permit. The permittee shall also furnish to the Agency upon request, copies of records required to be kept by this permit.

Byron and Braidwood Stations, Units 1 and 2 Page B-17 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit

( & a ~ p k i t ! o nand entry. The permittee shall allow an authorized (1) The authorization is made in writing by" a representative of the Agency or USEPA (including an described in paragraph (a); and authorized contractor acting as a representative of the Agency (2) The authorization specifies either an individual or a or USEPA), upon the presentation of credentials and other position responsible for the overall operation of thc documents as may be required by law, to: facility, from which the discharge originates, such as (a) Enter upon the permittee's premises where a regulated a plant manager, superintendent or person of facility or activity is located or conducted, or where records equivalent responsibility; and must be kept under the conditions of this permit; (3) The written authorization is submitted to the Agency.

(b) Have access to and copy, at reasonable times, any (c) Changes of Authorlzatlon. If an authorization under (b) records that must be kept under the conditions of this is no longer accurate because a different individual or permit; position has responsibility for the overall operation of the (c) Inspect at reasonable times any facilities, equipment facility, a new authorization satisfying the requirements of (including monitoring and control equipment), practices, or (b) must be submitted to the Agency prior to or together operations regulated or required under this permit; and with any reports, information, or applications to be signed (d) Sample or monitor at reasonable times, for the purpose of by an authorized representative.

assuring permit compliance, or as othelwise authorized by (d) Certification. Any person signing a document under the Act, any substances or parameters at any location. paragraph (a) or (b) of this section shall make the following certification:

(10) Monitoring and records.

(a) Samples and measurements taken for the purpose of I certify under penalty of law that this document and all monitoring shall be representative of the monitored attachments were prepared under my direction or activity. supervision in accordance with a system designed to (b) The permittee shall retain records of all monitoring assure that qualified personnel properly gather and information, including all calibration and maintenance evaluate the information submitted. Based on my inquiry records, and all original strip chart recordings for of the person or persons who manage the system, or continuous monitoring instrumentation, copies of all those persons directly responsible for gathering the reports required by this permit, and records of all data information, the information submitted is, to the best of used to complete the application for this permit, for a my knowledge and belief, true, accurate, and complete. I period of at least 3 years from the date of this permit, am aware that there are significant penalties for measurement, report or application. Records related to submitting false information, including the possibility of the permittee's sewage sludge use and disposal activities fine and imprisonment for knowing violations.

shall be retained for a period of at least five years (or longer as required by 40 CFR Part 503). This period may (12) Reporting requirements.

be extended by request of the Agency or USEPA at any (a) Planned changes. The permittee shall give notice to the time. Agency as soon as possible of any planned physical (c) Records of monitoring information shall include: alterations or additions to the permitted facility.

(1) The date, exact place, and time of sampling or Notice is required when:

measurements; (1) The alteration or addition to a permitted facility may (2) The individual(s) who performed the sampling or meet one of the criteria for determining whether a measurements; facility is a new source pursuant to 40 CFR 122.29 (3) The date@)analyses were performed; (b); or (4) The indiiidual(s) who performed the analyses; (2) The alteration or addition could significantly change (5) The analytical techniques or methods used; and the nature or increase the quantity of pollutants (6) The results of such analyses. discharged. This notification applies to pollutants (d) Monitoring must be conducted according to test which are subject neither to effluent limitations in the procedures approved under 40 CFR Part 136, unless other permit, nor to notification requirements pursuant to test procedures have been specified in this permit. Where 40 CFR 122.42 (aX1).

no test procedure under 40 CFR Part 136 has been (3) The alteration or addition results in a significant approved, the permittee must submit to the Agency a test change in the permittee's sludge use or disposal method for approval. The permittee shall calibrate and practices, and such alteration, addition, or change perform maintenance procedures on all monitoring and may justify the application of permit conditions that analytical instrumentation at intervals to ensure accuracy are different from or absent in the existing permit, of measurements. including notification of additional use or disposal sites not reported during the permit application (11) Signatory requirement. All applications, reports or process or not reported pursuant to an approved information submitted to the Agency shall be signed and land application plan.

certified. (b) Antlcipated noncompliance. The permittee shall give (a) Application. All permit applications shall be signed as advance notice to the Agency of any planned changes in follows: the permitted facility or activity which may result in (1) For a corporation: by a principal executive officer of noncompliance with permit requirements.

at least the level of vice president or a person or (c) Transfers. This permit is not transferable to any person position having overall responsibility for except after notice to the Agency.

environmental matters for the corporation: (d) Compliance schedules. Reports of compliance or (2) For a partnership or sole proprietorship: by a general noncompliance with, or any progress reports on, interim partner or the proprietor, respectively; or and final requirements contained in any compliance (3) For a municipality, State, Federal, or other public schedule of this permit shall be submitted no later than 14 agency: by either a principal executive oWlcer or days following each schedule date.

ranking elected official. (e) Monitoring reports. Monitoring results shall be reported (b) Reports. All reports required by permits, or other at the intervals specified elsewhere in this permit.

information requested by the Agency shall be signed by a (1) Monitoring results must be reported on a Discharge person described in paragraph (a) or by a duly authorized Monitoring Report (DMR).

representative of that person. A person is a duly authorized representative only if:

Byron and Braidwood Stations, Units 1 and 2 Page B-18 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Sage 18.

(2) If the permittee monitors any pollutant more (d) Prohibition of bypass.

frequently than required by the permit, using test (1) Bypass is prohibited, and the Agency may take procedures approved under 40 CFR 136 or as enforcement action against a permittee for specified in the permit, the results of this monitoring bypass, unless:

shall be included in the calculation and reporting of (i) Bypass was unavoidable to prevent loss of life.

the data submitted in the DMR. personal injury, or severe property damage; (3) Calculations for all limitations which require (ii) There were no feasible alternatives to the averaging of measurements shall utilize an arithmetic bypass, such as the use of auxiliary treatment mean unless otherwise specified by the Agency in facilities, retention of untreated wastes, or the permit. maintenance during normal periods of

( f ) Twenty-four hour reporting. The permittee shall report equipment downtime. This condition is not any noncompliance which may endanger health or the satisfied if adequate back-up equipment should environment. Any information shall be provided orally have been installed in the exercise of within 24-hours from the time the permittee becomes reasonable engineering judgment to prevent a aware of the circumstances. A written submission shall bypass which occurred during normal periods also be provided within 5 days of the time the permittee of equipment downtime or preventive becomes aware of the circumstances. The written maintenance; and submission shall contain a description of the (iii) The perrnittee submitted notices as required noncompliance and its cause; the period of under paragraph (13)(c).

noncompliance, including exact dates and time; and if the (2) The Agency may approve an anticipated bypass, noncompliance has not been corrected, the anticipated after considering its adverse effects, if the Agency time it is expected to continue; and steps taken or determines that it will meet the three conditions planned to reduce, eliminate, and prevent reoccurrence listed above in paragraph (13Xd)(l).

of the noncompliance. The following shall be included as informationwhich must be reported within 24-hours: (14) Upset.

(1) Any unanticipated bypass which exceeds any (a) Definition. Upset means an exceptional incident in which effluent limitation in the permit. there is unintentional and temporary noncompliance with (2) Any upset which exceeds any effluent limitation in technology based permit effluent limitations because of the permit. factors beyond the reasonable control of the permittee.

(3) Violation of a maximum daily discharge limitation for An upset does not include noncompliance to the extent any of the pollutants listed by the Agency in the caused by operational error, improperly designed permit or any pollutant which may endanger health or treatment facilities, inadequate treatment facilities. lack of the environment. preventive maintenance, or careless or improper The Agency may waive the written report on a case- operation.

by-case basis if the oral report has been received (b) Effect of an upset. An upset constitutes an affirmative within 24-hours. defense to an action brought for noncompliancewith such (g) Other noncornpllance. The permittee shall report all technology based permit emuent limitations if the instances of noncompliance not reported under requirements of paragraph (14Mc) are met. No paragraphs (12) (d), (e), or (9, at the time monitoring determination made during administrative review of reports are submitted. The reports shall contain the claims that noncompliance was caused by upset, and information listed in paragraph(12) (9. before an action for noncompliance, is final administrative (h) Other information. Where the permittee becomes action subject to judicial review.

aware that it failed to submit any relevant facts in a permit (c) Conditions necessary for a demonstration of upset. A application, or submitted incorrect information in a permit permittee who wishes to establish the affirmative defense application, or in any report to the Agency, it shall of upset shall demonstrate, through properly signed, promptly submit such fads or information. contemporaneous operating logs, or other relevant evidence that:

(13) Bypass. (1) An upset occurred and that the permittee can identify (a) Definitions. the cause(s) of the upset (1) Bypass means the intentional diversion of waste (2)The permitted facility was at the time being properly streams from any portion of a b-eatment facility. operated; and (2) Severe property damage means substantial (3)The permittee submitted notice of the upset as physical damage to property, damage to the required in paragraph (12)(f)(2) (24-hour notice).

treatment facilities which causes them to become (4) The permittee complied with any remedial measures inoperable, or substantial and permanent loss of required under paragraph (4).

natural resources which can reasonably be (d) Burden of proof. In any enforcement proceeding the expected to occur in the absence of a bypass. permittee seeking to establish the occurrence of an upset Severe properly damage does not mean economic has the burden of proof.

loss caused by delays in production.

(b) Bypass not exceeding limitations. The permittee may (15) Transfer of permits. Permits may be transferred by allow any bypass to occur which does not cause modification or automatic transfer as described below:

effluent limitations to be exceeded, but only if it also is (a) Transfers by modification. Except as provided in for essential maintenance to assure efficient paragraph (b), a permit may be transferred by the operation. These bypasses are not subject to the permittee to a new owner or operator only if the permit provisions of paragraphs (13)(c) and (13Xd). has been modified or revoked and reissued pursuant to (c) Notice. 40 CFR 122.62 (b) (2), or a minor modification made (1) Anticipated bypass. If the permittee knows in pursuant to 40 CFR 122.63 (d), to identify the new advance of the need for a bypass, it shall submit permittee and incorporate such other requirements as prior notice, if possible at least ten days before may be necessary under the Clean Water Act.

the date of the bypass. (b) Automatic transfers. As an alternative to transfers under (2) Unanticipated bypass. The permittee shall paragraph (a), any NPDES permit may be automatically submit notice of an unanticipated bypass as transferred to a new permittee if:

required in paragraph (12Xf) (24-hour notice).

Byron and Braidwood Stations, Units 1 and 2 Page B-19 License Renewal Application

Byron Station Environmental Report Appendix B - NPDES Permit Page 19.

(1) The current permittee notifies the Agency at least 30 (20) Any authorization to construct issued to the permittee days in advance of the proposed transfer date; pursuant to 35 111. Adm. Code 309.154 is hereby incorporated (2) The notice includes a written agreement between the by reference as a condition of this permit.

existing and new permittees containing a specified date for transfer of permit responsibility, coverage and (21) The permittee shall not make any false statement, liability between the existing and new permittees; and representation or certification in any application, record, (3) The Agency does not notify the existing permittee and report, plan or other document submitted to the Agency or the the proposed new permittee of its intent to modify or USEPA, or required to be maintained under this permit.

revoke and reissue the permit. If this notice is not received, the transfer is effective on the date specified (22) The Clean Water Act provides that any person who violates a in the agreement. permit condition implementing Sections 301, 302, 306, 307, 308, 318, or 405 of the Clean Water Act is subject to a civil (16) All manufacturing, commercial, mining, and silvicultural penalty not to exceed $25,000 per day of such violation. Any dischargers must notify the Agency as soon as they know or person who wilhlly or negligently violates permit conditions have reason to believe: implementing Sections 301, 302, 306, 307, 308, 318 or 405 of (a) That any activity has occurred or will occur which would the Clean Water Act is subject to a fine of not less than result in the discharge of any toxic pollutant identified $2,500 nor more than $25,000 per day of violation, or by under Section 307 of the Clean Water Act which is not imprisonment for not more than one year, or both.

limited in the permit, if that discharge will exceed the Additional penalties for violating these sections of the Clean highest of the following notification levels: Water Act are identified in 40 CFR 122.41 (aM2) and (3).

(1) One hundred micrograms per liter (100 ugll);

(2) Two hundred micrograms per liter (200 ug/l) for (23) The Clean Water Act provides that any person who falsifies, acrolein and acrylonitrile; five hundred micrograms tampers with, or knowingly renders inaccurate any monitoring per liter (500 ugh) for 2,4dinitrophenol and for 2- device or method required to be maintained under this permit methyl-4,6 dinitrophenol; and one milligram per liter shall, upon conviction, be punished by a fine of not more than (1 rngil) for antimony. $10.000, or by imprisonment for not more than 2 years, or (3) Five (5) times the maximum concentration value both. If a conviction of a person is for a violation committed reported for that pollutant in the NPDES permit after a first conviction of such person under this paragraph, application; or punishment is a fine of not more than $20,000 per day of (4) The level established by the Agency in this permit. violation, or by imprisonment of not more than 4 years, or (b) That they have begun or expect to begin to use or both.

manufacture as an intermediate or final product or byproduct any toxic pollutant which was not reported in (24) The Clean Water Act provides that any person who knowingly the NPDES permit application. makes any false statement, representation, or certification in any record or other document submitted or required to be (17) All Publicly Owned Treatment Works (POTWs) must provide maintained under this permit, including monitoring reports or adequate notice to the Agency of the following: reports of compliance or non-compliance shall, upon (a) Any new introduction of pollutants into that POTW from conviction, be punished by a fine of not more than $10,000 an indirect discharge which would be subject to Sections per violation, or by imprisonment for not more than 6 months 301 or 306 of the Clean Water Act if it were directly per violation, or by both.

discharging those pollutants; and (b) Any substantial change in the volume or character of (25) Collected screening, slurries, sludges, and other solids shall pollutants being introduced into that P O W by a source be disposed of in such a manner as to prevent entry of those introducing pollutants into the POTW at the time of wastes (or runoff from the wastes) into waters of the State.

issuance of the permit. The proper authorization for such disposal shall be obtained (c) For purposes of this paragraph, adequate notice shall from the Agency and is incorporated as part hereof by include information on (i) the quality and quantity of reference.

effluent introduced into the P O W , and (ii) any anticipated impact of the change on the quantity or quality (26) In case of conflict between these standard conditions and any of effluent to be discharged from the P O W . other condition(s) included in this permit, the other condition(s) shall govern.

(18) If the permit is issued to a publicly owned or publicly regulated treatment works, the permittee shall require any industrial (27) The permittee shall comply with, in addition to the user of such treatment works to comply with federal requirements of the permit. all applicable provisions of 35 111.

requirements concerning: Adm. Code, Subtitle C, Subtitle D, Subtitle E, and all (a) User charges pursuant to Section 204 (b) of the Clean applicable orders of the Board or any court with jurisdiction.

Water Act, and applicable regulations appearing in 40 CFR 35; (28) The provisions of this permit are severable, and if any (b) Toxic pollutant effluent standards and pretreatment provision of this permit, or the application of any provision of standards pursuant to Section 307 of the Clean Water this permit is held invalid, the remaining provisions of this Act; and permit shall continue in full force and effect.

(c) Inspection, monitoring and entry pursuant to Section 308 of the Clean Water Act. (Rev. 7-9-2010 bah)

(19) If an applicable standard or limitation is promulgated under Section 301(b)(2)(C) and (D), 304(bX2), or 307(a)(2) and that effluent standard or limitation is more stringent than any effluent limitation in the permit, or controls a pollutant not limited in the permit, the permit shall be promptly modified or revoked, and reissued to conform to that effluent standard or limitation.

Byron and Braidwood Stations, Units 1 and 2 Page B-20 License Renewal Application

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