ML14045A101

Response to NRC Request for Additional Information on License Renewal Application and Environmental Report

ML14045A101
Person / Time
Site:	Byron
Issue date:	02/11/2014
From:	Gallagher M P Exelon Generation Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
RS-14-051
Download: ML14045A101 (208)

Text

Ad MEMichael R Gallagher AVice President, License Renewal~Iii 'h ~rrtir'~Exelon Nuclear Exe!on Generation,., 200 Exelon Way Kennett Square, PA 19348 610 765 5958 Office 610 765 5956 Fax www.exeloncorp.corn michaelp.gallagher@exeloncorp.comn 10 CFR 50 10 CFR 51 10 CFR 54 RS-14-051 February 11,2014 U. S. Nuclear Regulatory Commission Attention:

Document Control Desk Washington, DC 20555-0001 Byron Station, Units 1 and 2 Facility Operating License Nos. NPF-37 and NPF-66 NRC Docket Nos. 50-454 and 50-455

Subject:

Response to NRC Request for Additional Information

-Additional Request, dated January 29, 2014, related to the Byron and Braidwood Stations, Units 1 and 2 License Renewal Application, Byron Station Applicant's Environmental Report

References:

1. Exelon Generation Company, LLC letter from Michael P. Gallagher to NRC Document Control Desk, "Application for Renewed Operating Licenses", dated May 29, 2013 2. Letter from Lois M. James (NRC) to Michael P. Gallagher (Exelon), "Requests for Additional Information for the Environmental Review of the Byron Nuclear Station, Units 1 and 2, License Renewal Application

-Additional Request, dated January 29, 2014 In the Reference 1 letter, Exelon Generation Company, LLC (Exelon Generation) submitted the License Renewal Application (LRA) for the Byron and Braidwood Stations, Units 1 and 2. In the Reference 2 letter, the NRC requested additional information to support the Staff's review of the Byron Station Applicant's Environmental Report (Appendix E, Item E-2 to the LRA).The enclosure to this letter provides the additional information requested by the Staff.This letter and its enclosures contain no regulatory commitments.

February 11, 2014 U.S. Nuclear Regulatory Commission Page 2 If you have any questions, please contact Mr. Al Fulvio, Manager, Exelon Generation License Renewal, at 610-765-5936.

I declare under penalty of perjury that the foregoing is true and correct.Executed on: /1 Respectfully, Michael P. Gallagher Vice President

-License Renewal Projects Exelon Generation Company, LLC

Enclosure:

Hard copies of Response Sheets plus other Relevant Documents cc: Regional Administrator

-NRC Region III (w/ Response Sheets only)NRC Project Manager (Environmental Review), NRR-DLR (w/ Response Sheets only)NRC Project Manager (Safety Review), NRR-DLR (w/ Response Sheets only)NRC Project Manager, NRR-DORL Byron Station (w/ Response Sheets only)NRC Senior Resident Inspector, Byron Station (w/ Response Sheets only)Illinois Emergency Management Agency -Division of Nuclear Safety February 11, 2014 U.S. Nuclear Regulatory Commission Page 2 bcc: (all w/ Response Sheets only)BYR Site VP -F. Kearney BYR Plant Manager -B. Youman BYR Manager Chemistry, Rad Waste & Environmental

-A. Corrigan BYR Environmental Chemist -N. Gordon Mid-West Mgr Environmental Programs -R. Beem Mid-West Principal Environmental Specialist

-J. Petro Mid-West Senior Environmental Specialist

-F. Bevington Corp Dir Environmental Programs & Reg Policy -Z. Karpa Corp VP Fleet Support -P. Orphanos Corp Dir Licensing

-G. Kaegi Corp Mgr Licensing, Braidwood and Byron Stations -P. Simpson Corp License Renewal Mgr -A. Fulvio Corp License Renewal Technical Lead -D. Warfel Corp License Renewal Engineering Mgr -A. Piha Corp License Renewal BYR Site Lead -D. Brindle Corp License Renewal Environmental Lead -N. Ranek Corp License Renewal Licensing Lead -J. Hufnagel Exelon Document Control Desk Licensing Exelon Generation RS-1 4-051 Enclosure Responses to Additional RAts AQ-1e and AQ-If Byron Station License Renewal Environmental Review This Page Intentionally Blank Byron Environmental Audit -Request for Additional Information Response Question #: AQ-le Category:

Aquatic Statement of Question: Provide the following information:

e. (ComEd 1981 b) Commonwealth Edison Company. 1981. Byron Station Environmental Report Operating License Stage. Vol. 2. Amendment No. 4 January 1983 -coversheet and Section 3.4 Response: The requested information is attached.

Please note that Exelon Generation is providing the excerpted section 3.4 from Volume 2 of the Byron Station Environmental Report Operating License Stage, as amended. There were four amendments to the Byron Station Environmental Report Operating License Stage, which are listed below.Amendment No. 1, July 1981 Amendment No. 2, September 1981 Amendment No. 3, March 1982 Amendment No. 4, January 1983 Each amendment was incorporated into the original document using the change-page method, which involved removing affected pages from the original document and inserting revised pages that were marked to indicate the amendment number and the location on the page of affected text. Hence, any particular page in the Byron Station Environmental Report Operating License Stage, as amended, may be an original page, or a page that was revised by one or more amendments.

The markings on each page indicate whether the page was changed by an amendment.

The pages being provided for each requested section were taken from a version of the full document that was updated through Amendment No. 4 (January 1983). Each specific page is marked with the most recent amendment number that affected the page. If no amendment number is marked on a page, then it was not changed from the original version published in 1981.Also note that the Byron Station Environmental Report Operating License Stage consisted of two volumes. Volume 1 contains an overview Table of Contents plus Chapters 1 and 2.Volume 2 contains the remainder of the chapters.

In both volumes, each chapter begins with detailed Front Material (Table of Contents, List of Tables, and List of Figures) for the chapter, except Chapter 2 in Volume 1, for which the Front Material and Section 2.1 are missing from the PDF file that Exelon obtained from the NRC Public Document Room.List of Attachments Provided: 1. (CoinEd 1981b) Commonwealth Edison Company. 1981. Byron Station Environmental Report Operating License Stage. as amended through Amendment No. 4, January 1983* Vol. 1 -Cover Sheet and Overview Table of contents;* Vol. 2 -Cover Sheet, o Chapter 3 Front Material and Section 3.4, Heat Dissipation System This. Page Intentionally Blank Byron Environmental Audit -Request for Additional Information Response Question #: AQ-lf Category:

Aquatic Statement of Question: Provide the following information:

f. Commonwealth Edison Company. 1981. Byron Station Environmental Report Operating License Stage. Vol. 2. Amendment No. 4. January 1983. [Audit Reference Material]" i) coversheet ii) Section 2.2.1, Aquatic Ecology iii) Section 4.1.4.2, Aquatic Studies iv) Section 5.1.3, Biological Effects [on the Rock River]v) Section 5.2.1.1.2, Aquatic Pathways for Biota Other Than Man vi) Section 6.1.1, Pre-Operational Monitoring of Surface Water vii) Section 6.2.1, Aquatic Monitoring Response: The requested information is attached.

Please note that Exelon Generation is providing the excerpted sections from the Byron Station Environmental Report Operating License Stage, as amended. There were four amendments to the Byron Station Environmental Report Operating License Stage, which are listed below.Amendment No. 1, July 1981 Amendment No. 2, September 1981 Amendment No. 3, March 1982 Amendment No. 4, January 1983 Each amendment was incorporated into the original document using the change-page method, which involved removing affected pages from the original document and inserting revised pages that were marked to indicate the amendment number and the location on the page of affected text. Hence, any particular page in the Byron Station Environmental Report Operating License Stage, as amended, may be an original page, or a page that was revised by one or more amendments.

The markings on each page indicate whether the page was changed by an amendment.

The pages being provided for each requested section were taken from a version of the full document that was updated through Amendment No. 4 (January 1983). Each specific page is marked with the most recent amendment number that affected the page. If no amendment number is marked on a page, then it was not changed from the original version published in 1981.Also note that the Byron Station Environmental Report Operating License Stage consisted of two volumes. Volume I contains an overview Table of Contents plus Chapters 1 and 2.Volume 2 contains the remainder of the chapters.

In both volumes, each chapter begins with detailed Front Material (Table of Contents, List of Tables, and List of Figures) for the chapter, except Chapter 2 in Volume 1, for which the Front Material and Section 2.1 are missing from the PDF file that Exelon obtained from the NRC Public Document Room.

List of Attachments Provided: 1. Commonwealth Edison Company. 1981. Byron Station Environmental Report Operating License Stage, as amended through January 1983. Front material and excerpted sections 2.2.1, 4.1.4.2, 5.1.3, 5.2.1.1.2, 6.1.1, and 6.2.1* Vol. 1 -Cover Sheet and Overview Table of contents;o Section 2.2.1, Aquatic Ecology* Vol. 2 -Cover Sheet;o Chapter 4 Front Material and Section 4.1.4.2, Aquatic Studies o Chapter 5 Front Material, Section 5.1.3, Biological Effects [on the Rock River], and Section 5.2.1.1.2, Aquatic Pathways for Biota Other Than Man o Chapter 6 Front Material, Section 6.1.1 Pre-Operational Monitoring of Surface Water, Section 6.2.1 Aquatic Monitoring, and 6.3 Related Environmental Measurement and Monitoring Programs Exelon Generation RS-14-051 Enclosure Responses to Additional RAIs AQ-le and AQ-lf Byron Station License Renewal Environmental Review This Page Intentionally Blank RS-14-051 Enclosure, RAI AQ-le Response Page 1 of 18 Byron Environmental Audit -Request for Additional Information Response Question #: AQ-le Category:

Aquatic Statement of Question: Provide the following information:

e. (ComEd 1981b) Commonwealth Edison Company. 1981. Byron Station Environmental Report Operating License Stage. Vol. 2. Amendment No. 4 January 1983 -coversheet and Section 3.4 Response: The requested information is attached.

Please note that Exelon Generation is providing the excerpted section 3.4 from Volume 2 of the Byron Station Environmental Report Operating License Stage, as amended. There were four amendments to the Byron Station Environmental Report Operating License Stage, which are listed below.Amendment No. 1, July 1981 Amendment No. 2, September 1981 Amendment No. 3, March 1982 Amendment No. 4, January 1983 Each amendment was incorporated into the original document using the change-page method, which involved removing affected pages from the original document and inserting revised pages that were marked to indicate the amendment number and the location on the page of affected text. Hence, any particular page in the Byron Station Environmental Report Operating License Stage, as amended, may be an original page, or a page that was revised by one or more amendments.

The markings on each page indicate whether the page was changed by an amendment.

The pages being provided for each requested section were taken from a version of the full document that was updated through Amendment No. 4 (January 1983). Each specific page is marked with the most recent amendment number that affected the page. If no amendment number is marked on a page, then it was not changed from the original version published in 1981.Also note that the Byron Station Environmental Report Operating License Stage consisted of two volumes. Volume 1 contains an overview Table of Contents plus Chapters 1 and 2.Volume 2 contains the remainder of the chapters.

In both volumes, each chapter begins with detailed Front Material (Table of Contents, List of Tables, and List of Figures) for the chapter, except Chapter 2 in Volume 1, for which the Front Material and Section 2.1 are missing from the PDF file that Exelon obtained from the NRC Public Document Room.List of Attachments Provided: 1. (CoinEd 1981b) Commonwealth Edison Company. 1981. Byron Station Environmental Report Operating License Stage. as amended through Amendment No. 4, January 1983* Vol. 1 -Cover Sheet and Overview Table of contents;" Vol. 2 -Cover Sheet, o Chapter 3 Front Material and Section 3.4, Heat Dissipation System RS-14-051 Enclosure, RAI AQ-le Response Page 2 of 18 This Page Intentionally Blank RS-14-051 Enclosure, RAI AQ-le Response Page 3 of 18 BYRON STATION ENVIRONMENTAL REPORT OPERATING LICENSE STAGE VOLUME 1 COMMONWEALTH EDISON COMPANY RS-14-051 Enclosure, RAI AQ-le Response Page 4 of 18 Byron ER-OLS BYRON NUCLEAR GENERATING STATION -UNITS 1 & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE CONTENTS CHAPTER VOLUME Introduction Chapter 1.0 -Purpose of the Proposed Facility and Associated Transmission Chapter 2.0 -The Site and Environmental Interfaces Appendix 2.6A -Cultural, Historical, Archaeological Letters Chapter 3.0 -The Station Appendix 3.5A -Data Needed for Radioactive Source Term Calculations for Pressurized Water Reactors Chapter 4.0 Environmental Effects of Site Preparation, Station Construction, and Transmission Facilities Construction Appendix 4.5A -Construction Impact Control Letter Chapter 5.0 -Environmental Effects of Station Operation Appendix 5.1A -Plume Models Appendix 5.1B -Analysis of Thermal Plume for the Blowdown Discharge from the Byron Power Station Appendix 5.1C -Effects of Outfall Design on the Thermal Impact of Byron Station Blowdown Discharge Appendix 5.2A -Examples of Dose Calculational Methods Chapter 6.0 -Effluent and Environmental Measurements and Monitoring Programs 1 1 1 2 2 2 i RS-14-051 Enclosure, RAI AQ-le Response Page 5 of 18 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 AMENDMENT NO. 2 SEPTEMBER 1981 AMENDMENT NO. 3 MARCH 1982 AMENDMENT NO. 4 JANUARY 1983 CONTENTS (Cont'd)CHAPTER Appendix 6.1A -Formulas Used in Analyses of Algal VOLUME 2 Chapter 7.0 Chapter 8.0 Chapter 9.0 Chapter 10.0 Chapter 11.0 Chapter 12.0 Chapter 13.0 Amendment No. 1 Amendment No. 2 Amendment No. 3 Amendment No. 4 Data-Environmental Effects of Accidents-Economic and Social Effects of Station Construction and Operation-Alternative Energy Sources and Sites-Station Design Alternatives

-Summary Cost-Benefit Analysis-Environmental Approvals and Consultation

-References

-NRC Review Questions and Responses-NRC Review Questions and Responses-NRC Review Questions and Responses-Voluntary Revisions 11 12 13 14 ii RS-14-051 Enclosure, RAI AQ-1e Response Page 6 of 18 BYRON STATION ENVIRONMENTAL REPORT OPERATING LICENSE STAGE VOLUME 2 COMMONWEALTH EDISON COMPANY RS-14-051 Enclosure, RAI AQ-le Response Page 7 of 18 Byron ER-OLS AMENDMENT NO. 3 MARCH 1982 CHAPTER 3.0 -THE STATION TABLE OF CONTENTS PAGE 3.1 EXTERNAL APPEARANCE 3.1-1 3.1.1 Structures 3.1-1 3.1.2 Arrangement of Structures 3.1-1 3.1.3 Architectural Features and Aesthetic Considerations 3.1-2 3.1.4 Release Points 3.1-2 3.2 REACTOR AND STEAM-ELECTRIC SYSTEM 3.2-1 3.2.1 System Description 3.2-1 3.2.2 Fuel Description 3.2-1 3.2.3 Power Output 3.2-2 3.2.4 Relationship of Station Heat Rate to Ex-pected Variation of Turbine Backpressure 3.2-2 3.2.5 Proposed Station Operating Life 3.2-2 3.3 STATION WATER USE 3.3-1 3.3.1 Circulating Water System 3.3-1 3.3.2 Service Water Systems 3.3-2 3.3.2.1 Nonessential Service Water System 3.3-2 3.3.2.2 Essential Service Water System 3.3-3 3.3.3 Steam Cycle Makeup and Potable Water Supply Systems 3.3-3 3.3.4 Variations in Plant Water Use 3.3-3 3.4 HEAT DISSIPATION SYSTEM 3.4-1 3.4.1 Natural Draft Cooling Towers 3.4-1 3.4.2 Mechanical Draft Cooling Towers 3.4-2 3.4.3 Intake and Discharge Structures 3.4-2a 3.5 RADWASTE SYSTEMS AND SOURCE TERMS 3.5-1 3.5.1 Source Terms 3.5-1 3.5.1.1 Sources of Radioactivity and Calculation Models 3.5-1 3.5.1.2 Tritium 3.5-3 3.5.1.3 Fuel Pool 3.5-5 3.5.1.4 Leakage Paths 3.5-6 3.5.2 Liquid Radwaste System 3.5-6 3.5.2.1 Objectives 3.5-6 3.5.2.2 Input to the Liquid Radwaste System 3.5-6 3.5.2.2.1 Steam Generator Blowdown 3.5-7 3.5.2.2.2 Chemical Drains 3.5-8 3.0-i RS-14-051 Enclosure, RAI AQ-le Response Page 8 of 18 Byron ER-OLS AMENDMENT NO. 3 MARCH 1982 TABLE OF CONTENTS (Cont'd)PAGE 3.5.2.2.3 Regenerant Waste Drains 3.5-8 3.5.2.2.4 Turbine Building Floor Drains 3.5-9 3.5.2.2.5 Turbine Building Equipment Drains 3.5-9 3.5.2.2.6 Auxiliary Building Equipment Drains 3.5-9 3.5.2.2.7 Auxiliary Building Floor Drains 3.5-10 3.5.2.2.8 Laundry Drains 3.5-10 3.5.2.3 Liquid Radwaste Discharges 3.5-10 3.5.3 Gaseous Radwaste System 3.5-11 3.5.3.1 Objectives 3.5-11 3.5.3.2 Gaseous Sources 3.5-11 3.5.3.3 System Description of the Gaseous Radwaste System 3.5-12 3.5.3.3.1 Building Ventilation Systems (Auxiliary Building and Solid Radwaste Building) 3.5-13 3.5.3.3.2 Normal Containment Purges 3.5-14 3.5.3.3.3 Steam-Jet Air Ejector 3.5-14 3.5.3.4 Gaseous Releases 3.5-15 3.5.3.5 Ventilation Stacks 3.5-15 3.5.4 Solid Radwaste System 3.5-16 3.5.4.1 Objectives and Design Basis 3.5-16 3.5.4.2 System Description 3.5-16 3.5.4.2.1 Drum Preparation Station 3.5-17 3.5.4.2.2 Decanting Station 3.5-17 3.5.4.2.3 Drumming Station 3.5-17 3.5.4.2.4 Drum Handling Equipment 3.5-18 3.5.4.2.5 Smear Test and Label Station .3.5-18 3.5.4.2.6 Dry Waste Compactor 3.5-18 3.5.4.2.7 Volume Reduction System 3.5-18 3.5.4.2.8 Radwaste Drum Storage Areas 3.5-19 3.5.4.2.9 Control Room 3.5-19 3.5.4.3 Interconnections with Liquid Radwaste 3 Systems 3.5-19 3.5.4.4 Shipment 3.5-19 3.5.5 Process and Effluent Monitoring 3.5-20 3.5A DATA NEEDED FOR RADIOACTIVE SOURCE TERM CALCULATIONS FOR PRESSURIZED WATER REACTORS 3.5A-i 3.6 CHEMICAL AND BIOCIDE SYSTEMS 3.6-1 3.6.1 Cooling Water Systems 3.6-1 3.6.1.1 Circulating Water System 3.6-1 3.6.1.2 Service Water System 3.6-2a 3.6.1.2.1 Nonessential Service Water 3.6-3 3.6.1.2.2 Essential Service Water 3.6-4 3.6.2 MakeupWater Treatment System. 3.6-4 3.6.2.1 Regeneration Wastes 3.6-4 3.6.2.2 Filter Backwash Effluent 3.6-5 3.0-ti RS-14-051 Enclosure, RAI AQ-le Response Page 9 of 18 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 AMENDMENT NO. 3 MARCH 1982 TABLE OF CONTENTS (Cont'd)PAGE 3.6.3 Waste Treatment 3.6-5 3.6.4 Potable Water System 3.6-5 3.6.5 Radwaste System 3.6-6 3.7 SANITARY AND OTHER WASTE SYSTEM 3.7-1 3.7.1 Sanitary Wastes 3.7-1 3.7.2 Other Waste Systems 3.7-1 3.8 REPORTING OF RADIOACTIVE MATERIAL MOVEMENT 3.8-1 3.9 TRANSMISSION FACILITIES 3.9-1 3.9,1 LocatiOn And Description of Rights-of-Way 3.9-1 3.9.1.1 Byron Station to the Wempletown Trans-mission Substation 3.9-1 3.9.1.2 Byron Station to the Cherry Valley "1 Transmission Substation 3.9-2 3.9.1.3 Byron Station to the Existing Cherry Valley to Nelson Right-of-Way (Byron South Right-of-Way) 3.9-2 3,9.2 Line Design Parameters 3.9-3 3.9.3 Existing Substations Affected 3.9-3 3.9.3.1 Wenpletown Transmission Substation 3.9-3 3.9.3.2 Cherry Valley Transmission Substation 3.9-3 3.9.3.3 Ne~son Transmission Substation 3.9-3 3.9.4 Radiated Electrical and Acoustical Noise 3.9-3 3.9.5 Induced or Conducted Ground Currents 3.9-4 3.9.6 Electrostatic Field Effects 3.9-4 3.9.7 Ozone Production 3.9-4 3.9.8 Environmental Impact 3.9-5 3.9.9 Environmental Considerations of Trans-mission Routing 3.9-6 3.9.9.1 Byron to Wempletown Right-of-Way 3.9-6 3.9.9.2 Byron Station to Cherry Valley Substation 3.9-7 3.9.9.3 Byron South Right-of-Way 3.9-7 3.9.9.4 Summary 3.9-8 3.0-iii RS-14-051 Enclosure, RAI AQ-1e Response Page 10 of 18 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 CHAPTER 3.0 -THE STATION LIST OF TABLES NUMBER TITLE PAGE 3.2-1 Net Turbine Heat Rate 3.2-3 3.3-1 Average Seasonal Variations in Cooling Tower System 3.3-4 3.3-2 Variations in Plant Water Use 3.3-5 3.4-1 Estimated Variation in Discharge Temperature of Blowdown 3.4-1 3.5-1 Parameters Used in the Calculation of the Inventory of Radionuclides in the Secondary Coolant 3.5-21 3.5-2 Tritium Source Terms and Release Paths per Unit at the Station 3.5-22 3.5-3 Expected Annual Average Releases of Radionuclides in Liquid Effluents 3.5-23 3.5-4 Expected Annual Average Release of Air-borne Radionuclides 3.5-24 3.5-5 Parameters Used in the Gale-PWR Computer Program 3.5-26 3.5-6 Gaseous Radwaste System Component Data 3.5-29 3.5-7 Additional Ventilation Releases from Plant by Isotope 3.5-30 3.5-8 Annual Weight, Volume, and Activity of Radwaste Shipped from both Units at the Station 3.5-31 3.6-1 Seasonal Analysis of Rock River Water 3.6-7 3.6-2 Average Blowdown Water Analysis 3.6-8 3.6-3 Estimated Average Quantities Discharged to the Atmosphere from Drift of Two Natural-Draft Cooling Towers at the Byron Station 3.6-9 3.6-4 Estimated Maximum Effluent Analysis 3.6-10 3.6-5 Estimated Average Effluent Analysis 3.6-11 3.7-1 Illinois Emission Standards 3.7-3 3.9-1 Environmental Considerations of New Transmission Corridors 3.9-9 3. 0-iv RS-14-051 Enclosure, RAI AQ-1e Response Page 11 of 18 Byron ER-OLS AMENDMENT NO. 3 MARCH 1982 3.4 HEAT DISSIPATION SYSTEM 3.4.1 Natural Draft Cooling Towers At the Byron Nuclear Generating Station -Units 1 & 2 (Byron Station), natural draft towers were chosen for primary cooling and mechanical draft towers for essential service water cooling and for the ultimate heat sink. The use of cooling towers minimizes both the land area used for cooling purposes and the effects of heat dissipation.

The operational effects of the cooling towers, with respect to meteorology, is discussed in Subsection 5.1.4.The two natural draft towers are located as shown in the property diagram, Figure 2.1-4. Each tower consists of a 495-foot high concrete hyperbolic shell, a 605-foot diameter basin, and a 272-foot exit diameter.

The towers are designed to dissipate approximately 15.2 x 10' Btu/hr of heat absorbed by the circulating water system during a 13.1-second time-of-travel across the main condensers of the two units.The design parameters that significantly affect the temperature of the blowdown are those that affect the performance of the natural draft towers. Each tower circulates 662,000 gallons per minute of cooling water, of which 35,000 gal/min is service 13 water. At the design conditions of 890 F dry bulb temperature and 760 F wet bulb temperature, the towers cool the water from 1160 F to 920 F.In a natural draft tower the cooling water being circulated through the plant falls through a draft of air; heat is carried away mostly by evaporation and partly by sensible heat transfer.The rest of the water is collected at the bottom of the tower and returned to the cooling cycle. The flow of air through the tower is caused by a "chimney effect:" the density difference between the cool outside ambient air and the less dense inside air warmed by the water. At the design conditions, the ratio of the water flow to the air flow is approximately 2.35:1 by weight. This ratio decreases in cooler weather; i.e., more air will pass through the tower.The evaporation rate for the two natural draft towers when the plant is operating at full load varies between seasonal averages of 38.7 cubic feet per second (cfs) of water in the winter and 53.4 cfs in the summer. The maximum monthly evaporation has been calculated to be approximately 54.6 cfs. The maximum drift loss has been specified as 0.002% of the circulating water flow or 0.06 cfs.To keep the total dissolved solids (TDS) concentration within the limits set by water pollution regulations and operating requirements, water has to be continuously withdrawn from the tower basin. This water is called blowdown.

For these purposes, 3.4-1 RS-14-051 Enclosure, RAI AQ-1e Response Page 12 of 18 Byron ER-OLS AMENDMENT NO. 3 MARCH 1982 an average blowdown rate of about 30.1 cfs is required.

The quantity of blowdown is dependent upon the water chemistry considerations and the evaporation rate of the cooling tower.The evaporation rate at any one time is dependent on the heat load and the ambient conditions at that time.Blowdown from the natural draft towers is returned to the Rock River through a discharge structure (see Figure 3.4-1) at an average rate of 30.1 cfs and a maximum velocity of 4.3 feet per second. There are two modulating valves on the blowdown line so that blowdown can be stopped during shutdown or refueling.

The TDS concentration of the blowdown averages about 1555 mg/liter.

13 As a result of the discharge of the blowdown into the flowing Rock River, a thermal plume is established downstream whose detailed temperature profile depends on river conditions and the blowdown characteristics.

The extent and effect of this plume are discussed in Section 5.1. A discussion of the blowdown temperature is included in Subsection 5.1.2.The total water loss attributable to evaporation, drift, and blowdown has to be replaced to maintain a constant cooling water flow. This quantity is called makeup and amounts to an average of approximately 68.1 cfs in the winter and 86.3 cfs in the summer for full load operation.

Table 3.4-1 shows the median monthly temperatures for the blowdown with both units operating at 100% load factor. The predicted temperature ranges from 60.40 F in January to 87.00 F in July.3.4.2 Mechanical Draft Cooling Towers In addition to the two natural draft towers, two mechanical draft towers, which cool the essential service water, have been built at the site. The mechanical draft towers are located as shown in Figure 2.1-4. Each tower consists of 4 cells. The overall dimensions of each tower are 50 feet high, 174 feet long, and 45 feet wide. Each tower is designed to cool 52,000 gal/min of water from 1380 F to 980 F under post-accident conditions concurrent with a 780 F wet-bulb temperature.

The guaranteed water flow to each tower is 48,000 gal/min. The cooling range 3 under normal operating conditions, however, will be approximately 100 F. The evaporation rate for these towers is a maximum of 2 cfs, with a maximum blowdown of 1.56 cfs; drift losses are negligible.

The maximum required makeup for these towers is therefore 3.56 cfs.3.4-2 RS-14-051 Enclosure, RAI AQ-1e Response Page 13 of 18 Byron ER-OLS AMENDMENT NO. 3 MARCH 1982 3.4.3 Intake and Discharge Structures Makeup is withdrawn from the Rock River through an intake structure as shown in Figure 3.4-2. The location of the intake (river screen house) and discharge structures is shown on Figure 3.4-3. The intake structure operating floor is located at an elevation of 687 feet above mean sea level (MSL), which is above the 1973 flood (flood of record) elevation of 683.6 feet MSL.3.4-2a RS-14-051 Enclosure, RAI AQ-le Response Page 14 of 18 Byron ER-OLS The mean annual flow and 1-day low flow at the intake are 4730 and 400 cfs, and the corresponding water surface elevations are 672 and 670.4 feet MSL. The pump invert elevation of the intake channel is 663.6 feet and the velocity in the intake channel is between 0.43 and 0.55 feet per second. The structure contains three circulating water pumps, two for normal operation and one for standby, each of which has a capacity of about 53.5 cfs. The structure also contains two diesel-engine-driven essential service water makeup pumps, one for each mechanical draft tower..Each pump has a capacity of about 3.5 cfs.The intake is protected by bar grills and traveling screens. The velocity at the intake is between 0.43 and 0.55 feet per second and decreases considerably with distance toward the center of the river. This velocity exists from the mouth of the intake at the bar racks to within a few feet of the traveling screens. The velocity through the traveling screens increases approximately two-fold because of the presence of the screens themselves.

Debris removed from these screens is disposed of off the site by an independent contractor.

These heat dissipation systems are summarized in the plant water usage diagram, Figure 3.3-1.3.4-3 RS-14-051 Enclosure, RAI AQ-le Response Byron ER-OLS Page 15 of 18 TABLE 3.4-1 ESTIMATED MONTHLY VARIATION IN DISCHARGE TEMPERATURE OF BLOWDOWN DISCHARGE TEMPERATURE MONTH (OF)Jan. 60.4 Feb. 61.1 Mar. 66.0 Apr. 73.0 May 78.5 June 84.0 July 87.0 Aug. 86.5 Sept. 81.7 Oct. 75.3 Nov. 66.0 Dec. 62.0 3.4-4 RS-14-051 Enclosure, RAI AQ-le Response Page 16 of 18 PLAN ss-& 11-r lapAm rEL.aasLd INVERT EL\SEE PLAN SECTION A-A BYRON NUCLEAR GENERATING STATION UNITS 1 & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE FIGURE 3.4-1 DISCHARGE STRUCTURE Ii I 11 21 FEET 0 CL C0 c -0u11 S11ON NICLIAR GENERAIInG STATION UNITS I & 2 ENVIRONMENTAL REPORT- OPERATING LICENSE STAGE FIGURE 3.4-2 INTAKE STRUCTURE RS-14-051 Enclosure, RAI AQ-le Response Page 18 of 18 ROCK INVERT EL 3I$C1AR1E FLUME INVERT EL. *6 I-0RUSE RIVER 7i"'-U" EL. $13'-l" 41 MILES TO COMO iA. STATI'NORMAL WATER EL. 672.6'LOW WATER EL. 671.4'633.6' I t EL. 633.2* 43" DIAMETER CIRCULATING WATER MAKE-UP LINE 4 12" DIAMETER ESSENTIAL SERVICE WATER MAKE-UP LINE BYRON NUCLEAR GENERATING STATION UNITS I & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE FIGURE 3.4-3 LOCATION OF INTAKE AND DISCHARGE STRUCTURES RS-14-051 Enclosure, RAI AQ-lf Response Page 1 of 179 Byron Environmental Audit -Request for Additional Information Response Question #: AQ-lf Category:

Aquatic Statement of Question: Provide the following information:

f. Commonwealth Edison Company. 1981. Byron Station Environmental Report Operating License Stage. Vol. 2. Amendment No. 4. January 1983. [Audit Reference Material]" i) coversheet ii) Section 2.2.1, Aquatic Ecology iii) Section 4.1.4.2, Aquatic Studies iv) Section 5.1.3, Biological Effects [on the Rock River]v) Section 5.2.1.1.2, Aquatic Pathways for Biota Other Than Man vi) Section 6.1.1, Pre-Operational Monitoring of Surface Water vii) Section 6.2.1, Aquatic Monitoring Response: The requested information is attached.

Please note that Exelon Generation is providing the excerpted sections from the Byron Station Environmental Report Operating License Stage, as amended. There were four amendments to the Byron Station Environmental Report Operating License Stage, which are listed below.Amendment No. 1, July 1981 Amendment No. 2, September 1981 Amendment No. 3, March 1982 Amendment No. 4, January 1983 Each amendment was incorporated into the original document using the change-page method, which involved removing affected pages from the original document and inserting revised pages that were marked to indicate the amendment number and the location on the page of affected text. Hence, any particular page in the Byron Station Environmental Report Operating License Stage, as amended, may be an original page, or a page that was revised by one or more amendments.

The markings on each page indicate whether the page was changed by an amendment.

The pages being provided for each requested section were taken from a version of the full document that was updated through Amendment No. 4 (January 1983). Each specific page is marked with the most recent amendment number that affected the page. If no amendment number is marked on a page, then it was not changed from the original version published in 1981.Also note that the Byron Station Environmental Report Operating License Stage consisted of two volumes. Volume 1 contains an overview Table of Contents plus Chapters 1 and 2.Volume 2 contains the remainder of the chapters.

In both volumes, each chapter begins with detailed Front Material (Table of Contents, List of Tables, and List of Figures) for the chapter, except Chapter 2 in Volume 1, for which the Front Material and Section 2.1 are missing from the PDF file that Exelon obtained from the NRC Public Document Room.

RS-14-051 Enclosure, RAI AQ-lf Response Page 2 of 179 List of Attachments Provided: 1. Commonwealth Edison Company. 1981. Byron Station Environmental Report Operating License Stage, as amended through January 1983.* Vol. 1 -Cover Sheet and Overview Table of contents;o Section 2.2.1, Aquatic Ecology* Vol. 2 -Cover Sheet;o Chapter 4 Front Material and Section 4.1.4.2, Aquatic Studies o Chapter 5 Front Material, Section 5.1.3, Biological Effects [on the Rock River], and Section 5.2.1.1.2, Aquatic Pathways for Biota Other Than Man o Chapter 6 Front Material, Section 6.1.1 Pre-Operational Monitoring of Surface Water, Section 6.2.1 Aquatic Monitoring, and Section 6.3 Related Environmental Measurement and Monitoring Programs RS-14-051 Enclosure, RAI AQ-lf Response Page 3 of 178 BYRON STATION ENVIRONMENTAL REPORT OPERATING LICENSE STAGE VOLUME 1 COMMONWEALTH EDISON COMPANY RS-14-051 Enclosure, RAI AQ-lf Response Page 4 of 178 Byron ER-OLS BYRON NUCLEAR GENERATING STATION -UNITS 1 & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE CONTENTS CHAPTER VOLUME Introduction 1 Chapter 1.0 -Purpose of the Proposed Facility and Associated Transmission Chapter 2.0 -The Site and Environmental Interfaces Appendix 2.6A -Cultural, Historical, Archaeological Letters Chapter 3.0 -The Station Appendix 3.5A -Data Needed for Radioactive Source Term Calculations for Pressurized Water Reactors Chapter 4.0 -Environmental Effects of Site Preparation, Station Construction, and Transmission Facilities Construction Appendix 4.5A -Construction Impact Control Letter Chapter 5.0 -Environmental Effects of Station Operation Appendix 5.1A -Plume Models Appendix 5.1B -Analysis of Thermal Plume for the Blowdown Discharge from the Byron Power Station Appendix 5.1C -Effects of Outfall Design on the Thermal Impact of Byron Station Blowdown Discharge Appendix 5.2A -Examples of Dose Calculational Methods Chapter 6.0 -Effluent and Environmental Measurements and Monitoring Programs 1 1 2 2 2 2 2 2 2 2 2 i RS-14-051 Enclosure, RAI AQ-lf Response Page 5 of 178 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 AMENDMENT NO. 2 SEPTEMBER 1981 AMENDMENT NO. 3 MARCH 1982 AMENDMENT NO. 4 JANUARY 1983 CONTENTS (Cont'd)CHAPTER VOLUME Appendix 6.1A Chapter Chapter 7.0 8.0 Chapter 9.0 Chapter Chapter Chapter 10.0 11.0 12.0-Formulas Used in Analyses of Algal Data-Environmental Effects of Accidents-Economic and Social Effects of Station Construction and Operation-Alternative Energy Sources and Sites-Station Design Alternatives

-Summary Cost-Benefit Analysis-Environmental Approvals and Consultation

-References

-NRC Review Questions and Responses-NRC Review Questions and Responses-NRC Review Questions and Responses-Voluntary Revisions 2 2 2 2 2 2 2 2 2 j1 2 12 Chapter 13.0 Amendment No. 1 Amendment No. 2 Amendment No. 3 Amendment No. 4 2 2 13 14 ii RS-14-051 Enclosure, RAI AQ-lf Response Page 6 of 178 Byron ER-OLS 2.2 ECOLOGY 2.2.1 Aquatic Environment 2.2. 1. 1 Introduction The baseline aquatic monitoring program on the Rock River and six creeks in the area (Stillman, Mill, Woodland, Leaf, Spring, and Silver creeks) was initiated by Environmental Analysts, Inc.(EAI) in April 1972 for the Commonwealth Edison Company (CECo).The 1972 through 1973 program was designed to describe the existing Rock River aquatic environment and provide a basis for assessing the impact of construction and operation of the proposed Byron Nuclear Generating Station Units 1 8 2 (Byron Station).Table 2.2-1 summarizes the physical, chemical, and biological parameters measured during the 1972 through 1973 program. The results and projections of construction impact concluded from the 1972 through 1973 studies are included in the Byron Station Construction Phase Environmental Report (ER-CPS), Subsections 2.7.1, 5.1.1, 5.1.2, and 5.1.3 (Docket Nos. STN 50-454 and STN 50-455).After the July 1973 field survey, a review was initiated that resulted in the definition of the 1973 through 1974 aquatic monitoring program, which was initiated in September 1973. The purpose of the 1973 through 1974 monitoring program was to .provide a second year of data to supplement observations made during the 1972 through 1973 program. Table 2.2-2 summarizes the physical, chemical, and biological parameters measured during the 1973 through 1974 program. Field surveys for the 1973 through 1974 program began on the Rock River and six creeks in the area (Stillman, Mill, Woodland, Leaf, Spring, and Silver creeks) in September 1973 and were conducted through October 1974. The following subsections present the results of the 1973 through 1974 aquatic monitoring program.2.2.1.2 Obiectives The objectives of the 1973 through 1974 aquatic monitoring program were the following:

a. to continue monitoring chemical and biological parameters, using the sampling stations previously included in the baseline (1972 through 1973)monitoring program;b. to document the species composition, distribution, and abundance of ecologically important aquatic organisms in the Rock River and several tributary streams;2.2-1 RS-14-051 Enclosure, RAI AQ-lf Response Page 7 of 178 Byron ER-OLS c. to continue observation of the seasonal trends of the water quality and biota of the study area; and d. to verify the predicted impact of the Byron Station on the water quality and biota of the Rock River.22.1.3 Location of Sampling Stations The locations of the sampling stations are shown in Figure 2.2-1.The Rock River was sampled at five stations, which were all transects, from a point 2.4 miles upstream of Byron, Illinois, to just upstream of the dam at Oregon, Illinois.

These transects were selected to yield data indicative of conditions in zones of the Rock River that could potentially be influenced by the construction and operation of the Byron Station. The transect areas for this study reflected some of the ranges of habitats between the Oregon and Rockford dams.River transect R-1 was located 2.4 miles upstream of Byron, Illinois.

This station was chosen to represent conditions well above the intake of the proposed station. Transect R-2, chosen to represent conditions in the vicinity of the proposed station's intake structure, was located approximately 300 yards above R-3, the discharge location.

Transect R-3, located 4.9 miles downstream from the town of Byron, was chosen to correspond with the discharge area. Transect R-4, located 0.7 mile below R-3, was chosen to include the area within the proposed station's thermal plume. Transect R-5, located about 1000 yards above the dam at Oregon, Illinois, was chosen to represent an area well below the outfall of the proposed station.In addition to the Rock River sampling stations, sampling sites were established in the mouths of tributary streams leading to the Rock River in the Byron site area. During the 1972 through 1973 program, there were initially nine creek sampling locations:

Stillman Creek (S-1); Mill Creek (S-2); Woodland Creek (S-3), (W-1), (W-2), and (W-3); Leaf River (S-4); Spring Creek (S-5); and Silver Creek (S-6). During the 1973 through 1974 program, Stations S-3, S-4, S-5, S-6, W-1, and W-2 were retained.2.2.1.4 Summary The following results were based on data obtained from the Rock River and tributary streams near the Byron Station: a. Changes observed in the chemistry of the Rock River and tributary streams resulted primarily from seasonal changes in temperature, precipitation, and river discharge rates.b. With the exception of phosphorus and, in one instance, copper, all trace metal concentrations were 2.2-2 RS-14-051 Enclosure, RAI AQ-lf Response Page 8 of 178 Byron ER-OLS within the Illinois Pollution Control Board's (IPCB)Water Quality Standards.

C. The levels of algal nutrients in the Rock River were generally high, reflecting the agricultural practices in the surrounding area and the discharges of treated domestic waste further upstream of the Byron Station site.d. Total bacteria, fecal coliform, and fecal streptococcus for the river stations fluctuated seasonally, with the highest counts occurring in April 1974 and the lowest in October 1974. Stream stations had a more varied response to seasonal changes.e. Total coliform counts for the river stations exceeded the federal recommended level of 10,000 per 10 milliýliers of sample on four of the six sampling dates.f. Seasonal fluctuations in fecal streptococcus numbers corresponded closely with the numbers of total bacteria and fecal coliform bacteria at the river stations and the fecal coliform at the stream stations.g. Diatoms .dominated the Rock River phytoplankton community during all the months sampled, composing between 76% and 100% of the total phytoplankton community.

Members of five other algal divisions were also present.h. The highest phytoplankton standing crop values were noted in the September 1973 sampling and the lowest in the January 1974 sampling, which is typical of the seasonality of phytoplankton populations.

i. Many of the dominant phytoplankton species that were present in the Rock River are indicative of eutrophic conditions.

j. Zooplankton populations and species diversity ranged from a low of 2 organisms per liter (at Station R-2)in January 1974 to a high of nearly 50 per liter (at Station R-2) in April 1974.k. The zooplankton community was dominated by rotifers at the Rock River stations on five of the six sampling occasions and on one of the two periods of sampling in the tributary streams.2.2-3 RS-14-051 Enclosure, RAI AQ-lf Response Page 9 of 178 Byron ER-OLS 1. The periphyton community was dominated by diatoms throughout the study period, constituting between 90%to 100% of the total periphyton community.

m. Periphyton populations ranged from a low of 7 x 106 cells/mg in March 1974 to a high of 1644 x 106 cells/rm in September 1974.n. Benthic organisms collected in the Rock River included dipterans, mayflies, caddisflies, snails, clams, and flatworms.

The pollution-tolerant tubificids, however, dominated the benthic invertebrate community.

o. Seven benthic substrate bottom types were described, with coarse gravel collected most often, followed by sand, muck, silt/sand, and muck/sand.

Other combinations were collected less frequently.

p. During the 1974 through 1975 study period, 31 species of fish were collected, with carpsuckers, channel catfish, and carp the most numerous.q. Condition factors, age class information, and length frequency analysis provided no unexpected or abnormal results.r. The results of the creel survey indicated that the fishermen's highest success rate was in June, followed closely by May and July, with the Oregon dam area being the most popular fishing site.s. Sixty fish larvae (predominantly from the minnow family) and two fish eggs were collected from the study area.t. No threatened or endangered fish species was collected.

2.2.1.5 Water Quality Physical, chemical, and bacteriological parameters were sampled in the Rock River and six creeks in the area (Stillman, Mill, wooodland, Leaf, Spring, and Silver creeks). The results of the water quality sampling program are described in this subsection with respect to observed seasonal variations, ranges of values, how they compare with the Illinois Pollution Control Board Water Quality Standards (IPCB 1975), and any unusual values or conditions noted during the study period.2.2-4 RS-14-051 Enclosure, RAI AQ-lf Response Page 10 of 178 Byron ER-OLS 2.2.1.5.1 General Physical and Chemical Parameters Water samples for chemical analysis were collected September 11 and October 16, 1973, and January 28, April 30, July 30, and October 8, 1974, from the mid-channel of five river stations (R-1 through R-5), two tributary streams (S-3 and S-5), and two Woodland Creek pools (W-1 and W-3).. Samples were taken from tributary stream Station S-6 only in 1974. All parameters, with the exception of pH, were analyzed in duplicate and averaged.The results are presented in Table 2.2-3. Trace metal analyses are presented in Table 2.2-4. Measurements of physical parameters taken in conjunction with water sample collection are presented in Table 2.2-5.The changes observed in the chemistry of the Rock River and tributary streams from September 1973 through October 1974 resulted mainly from seasonal changes in temperature, precipitation, and river discharge rates. The chemical parameters analyzed tended to correspond with results of the 1972 through 1973 sampling program (Byron ER-CPS). The concentrations of all parameters were within the Illinois standards (IPCB 1975)with the exception of phosphorus and, in one instance, copper.Nutrient concentrations (nitrate, nitrite, and phosphates) normally followed a fluctuating pattern, with decreasing concentrations generally occurring during the winter months, As was the case for the 1972 through 1973 baseline study.The section of the Rock River adjacent to the Byron Station and the tributary streaps draining this area appeared to be in a state of moderate eutrophication.

The chemistries of both the river and tributary streams were similar on most sampling dates with the exception of stream Stations W-1 and W-3. The intermittent nature of the streams appeared to be the major factor affecting the observed differences.

2.2.1.5.2 Bacteria Samples for bacterial analysis were collected September 11 and October 16, 1973, and January 28, April 30, July 30, and October 8, 1974, from the five Rock River stations (R-1 through R-5) and three tributary stream stations (S-3, S-5, and S-6). Duplicate samples were cultured using three serial dilutions; the counts are presented in Table 2.2-6 as numbers peral00 milliliters of sample.Total bacteria, fecal coliform, and fecal streptococcus for the Rock River stations fluctuated seasonally, with the highest counts occurring in April 1974 during peak runoff and the lowest counts in October 1974. This relationship was also noted during the 1972 through 1973 baseline study. Similar fluctuations in total coliform counts were observed, but the highest counts occurred in January (1974) rather than April 1974. The stream stations had a more varied response to seasonal changes than the river stations.2.2-5 RS-14-051 Enclosure, RAI AQ-lf Response Page 11 of 178 Byron ER-OLS Total coliform counts for the river stations exceeded the federal recommended level of 10,000 per 10 milliliters of sample on four of the six sampling dates. Station S-3 exceeded the recommended level four of the six times, whereas Stations S-5 and S-6 exceeded the level two of six times and two of four times, respectively.

The lowest counts for all the stations were reported for October 1974 and the next to the lowest on September 11, 1973.Although the fecal coliform samples collected were too few to allow number comparisons with the Illinois stream standard counts, the samples obtained exceeded the numerical standard in four of the six samples collected for all the river stations and for stream Stations S-3 and S-5. Fecal coliform was analyzed only four times at Station S-6 and exceeded the numerical standard each time. The counts were generally highest in April and lowest in July for all stations except S-5 and S-6, which had their lowest counts in September 1973.Seasonal fluctuations in fecal streptococcus numbers corresponded closely with total bacteria and fecal coliform bacteria counts in the river stations and fecal coliform counts in the stream stations.

To date, there is no Illinois or federal standard for fecal streptococcus.

Fecal coliform to fecal streptococcus ratios (FC:FS) varied appreciably on a seasonal basis. Ratios for the five Rock River stations indicated contributions by domestic wastes. Ratios greater than 4.0, which occurred in September and October 1973, indicated recent pollution by domestic wastes. Ratios between 0.6 and 4.0, which occurred during the remaining sampling dates, also indicated the presence of domestic wastes. A varied response to FC:FS ratios was observed in the stream stations.

In most instances, the ratios indicated contamination from domestic sources.2.2.1.6 Phytoplankton Phytoplankton samples were collected at river Stations R-2 and R-5 from September 11, 1973, through October 8, 1974, by immersing several 1-liter polypropylene bottles beneath the surface of the water. Phytoplankton samples were collected for the last time at Rodk River Transects R-1, R-3, and R-4, and at stream Transects S-3, S-4, and S-5 on September 11, 1973. Table 2.2-7 presents a cumulative taxonomic list of the organisms collected during the 1973 through 1974 study. A summary of the average numbers of species per milliliter and the relative abundance by major groups for each sampling period is given in Table 2.2-8. Species-diversity values for the phytoplankton community are listed in Table 2.2-9. These findings are comparable to the range of values found during a corresponding time period during the 1972 through 1973 baseline study.2.2-6 RS-14-051 Enclosure, RAI AQ-lf Response Page 12of 178 Byron ER-OLS A total of 118 taxa were identified during the 1973 through 1974 sampling program. These included 59 diatoms, 43 green algae, 9 blue-green algae, 4 euglenoids, 2 pyrrophytes, and I cryptophyte.

Numerically, diatoms dominated the community throughout the 1973 through 1974 study, ranging from 76.38% on October 8, 1974, to 100% on January 28, 1974. Dominant forms encountered during the study included Cyclotella meneghiniana.

Melosira ambiqua, M.granulata.

2L. qranulata var. angustissima, Stephanodiscus hantzschii.

S. minutus. S. subtilus.

and Nitzschia palea. These forms are commonly found in eutrophic waters.During the 1973 through 1974 study, standing crop values ranged from 176 cells per milliliter to 18,361 cells per milliliter.

The highest standing crop values for phytoplankton were noted in the September 11, 1973, sampling and the lowest in the January 28, 1974, sampling.

Variation in the phytoplankton standing crop values between the two river stations was not appreciably large.The data indicated that the phytoplankton community was fairly uniform along this segment of the Rock River.Relative species-diversity values ranged from 0.2296 at Station R-2 on October 16, 1973, to 0.7567 at R-2 on July 30, 1974 (see Table 2.2-9).2.2.1.7 Zooplankton Zooplankton samples were collected on six occasions from September 1973 through October 1974. Samples were taken September 11 and October 16, 1973, from Stations R-1 through R-5 and tributary streams S-4, S-5, and S-6. Samples collected during the remaining periods (January 28, April 30, July 30, and October 8, 1974) were taken only from Rock River Stations R-2 and R-5. Duplicate samples were taken at each location, and each sample was the concentrate of 60 liters of surface water poured through a #20 mesh plankton net. A cumulative taxonomic list of the zooplankton collected from September 1973 through October 1974 is given in Table 2.2-10. Table 2.2-11 summarizes average numbers per liter with relative abundance by major groups for each sampling period. During the 1973 through 1974 program, seasonal trends of zooplankton production at the Rock River sampling locations reflected spring and fall maxima, with low production in the winter and summer. Zooplankton numbers corresponded to numbers encountered during the 1972 through 1973 baseline study.Total zooplankton numbers throughout the study (on river stations) ranged from a low of 2 organisms per liter for Station R-2 on January 28, 1974, to a high of nearly 350 per liter for Station R-2 on April 30, 1974. The taxonomic composition of zooplankton collected during the study included 3 copepod species, 7 cladoceran species, 14 protozoa genera, and 18 rotifer genera.2.2-7 RS-14-051 Enclosure, RAI AQ-lf Response Page 13 of 178 Byron ER-OLS Rotifers were the numerically dominant taxa in the Rock River stations on five of the six sampling occasions and on one of the two periods in the stream sampling during the 1973 through 1974 program. Rotifers were also the most numerous organisms encountered during the 1972 through 1973 baseline study. The most commonly occurring forms included the juvenile copepod stages (nauplii and copepodites), the cladocerans Bosmina and Chydorus, and the rotifer genera Brachionus, Keratella, and Synchaeta.

There were no noticeable differences in either the zooplankton composition or numbers between Station R-2 at the proposed outfall area and the other Rock River sampling stations.2.2.1.8 Periphyton Artificial substrate samplers were used to sample the periphyton community at five river stations (R-1 through R-5), three tributary stream stations (S-3, S-4, and S-5 from September through December 1973, and S-3, s-5, and S-6 from January through September 1974), and two Woodland Creek pool stations (W-1 and W-2) from September 1973 through September 1974. Table 2.2-12 is a cumulative taxonomic listing of algae identified in the periphyton samples collected.

Analyses included species composition, relative abundance, biovolume, biomass, and numbers per unit area. The periphyton data collected during the 1973 through 1974 monitoring program did not deviate markedly from the information collected during the corresponding seasons of the 1972 through 1973 baseline study.A total of 266 algae taxa were identified from the September 1973 through September 1974 samples. These included 181 diatoms, 64 green algae, 1 chrysophyte, 12 blue-green algae, 7 euglenoids, and 1 pyrrophyte.

Throughout the 1973 through 1974 sampling program, the community was dominated by diatoms, which constituted 90% to 100% of the total units counted. Numerically, diatom lows in the river ranged from 7.15 x 106 cells/mi on March 29, 1974, to 1644.53 x 106 cells/mz on September 27, 1974 The dominant diatom forms during the 1973 through 1974 program included Melosira ambiqua, Melosira granulata var. angustissima, Nitzschia linearis, Navicula viridula var. avenacea, Gomhonema olivaceum, and Gomphonema parvulum, all of which are commonly found in eutrophic waters.2.2.1.9 Benthos 2.2.1.9.1 Ponar Dredge Samples Benthos samples were collected on September 5 and October 19, 1973, and on February 1, April 10, July 24, and October 28, 1974, from Rock River Transects R-I through R-5 and tributary stream Stations S-3, S-5, W-1, and W-3.2.2-8 RS-14-051 Enclosure, RAI AQ-lf Response Page 14 of 178 Byron ER-OLS Table 2.2-13 displays the monthly distribution of benthic taxa by major invertebrate groups. The benthcs collected during the period of September 1973 through October 1971 were separated into approximately 101 taxa from five invertebrate phyla (see Table 2.2-14). Tubificidae (aquatic worms) were separated into 13 species, Naididae (aquatic worms) into 2 species, and Hirudinea (leeches) into 2 species. Chironomidae (midgeflies) were separated into 32 genera, other Diptera (true flies) into 7 families, Ephemeroptera (mayflies) into 7 genera, and Trichoptera (caddisflies) and Odonata (dragonflies) into 5 genera each.Coleoptera (beetles) were separated into 9 genera within 3 families, Crustacea into 3 orders, and Mollusca into 2 classes (Gastropoda

[snails] with 5 genera and Pelecypoda

[clams] with 4 genera). Other organisms collected included Turbellaria (flatworms) , Nematoda (roundworms), and Acari (water mites).Samples studied for benthic substrate characteristics revealed eight bottom types collected during the 6 sampling months. Table 2.2-14 depicts the distribution of benthic taxa by date and substrate type. Samples containing coarse gravel (cGr) supported the greatest number of invertebrate taxa (93). Samples containing sand (sd) supported the next highest (77 taxa), followed by fine gravel (fGr; 43 taxa), silt (St; 10 taxa), muck (Mk; 40 taxa) fine rubble (FR; 17 taxa),} detritus (D; 11 taxa), and mollusk shells (3 taxa). The bottom type definitions were adapted from Lagler (1956) (see Table 2.2-15). Table 2.2-16 shows the occurrence of substrate type combinations in benthos samples collected from September 1973 through October 1974.Coarse gravel was collected most often (55 times), followed by sand, muck, silt/sand, and muck/sand..

Other combinations were collected less frequently.

2.2.1.9.2 Artificial Substrate Samples Macroinwrtebrate samples were collected on September 26, October 25, November 28, and December 27, 1973, and on January 28, February 28, March 29, April 24, May 31, June 27, July 31, and September 3, 1971. Modified Hester-Dendy multiplate samplers were used in assessing the macroinvertebrate drift community structure.

Two steel plates, each holding five multiplate samples, were positioned on the bottom of each side of Transects R-2, R-3, and R-4.The macroinvertebrates collected during the period of September 1973 through September 1974 in artificial substrate samples were separated into approximately 115 taxa from 1 invertebrate phyla (see Table 2.2-17). Tubificidae (aquatic worms) were separated into 12 species, Naididae (aquatic worms) into 7 species, and Hirudinea (leeches) into 4 species. Crustacea were separated into 4 taxa, Ephemeroptera (mayflies) into 16 taxa, Trichoptera (caddisflies) into 5 genera, Chironomidae (midgeflies) into 33 genera, and other Diptera (true flies) into 4 taxa. Coleoptera (beetles) and Odonata (dragonflies) were separated into 7 genera each,. Plecoptera (stoneflies) into 5 species, Gastropoda (snails)2.2-9 RS-14-051 Enclosure, RAI AQ-lf Response Page 15 of 178 Byron ER-OLS into 4 genera, and Pelecypoda (clams) into 1 genus. Turbelleria (flatworms), Hemiptera (true bugs), and Acari (water mites) were among the other organisms collected.

Table 2.2-18 displays the monthly distribution of macroinvertebrate taxa listed by major invertebrate groups.A comparison of the numerical distributions, by taxa, of macroinvertebrates collected from September 1973 to September 1974 is given in Table 2.2-19, which also presents the total numerical occurrence for the entire sampling period. Diptera accounted for the largest number of organisms collected (4868), followed by Ephemeroptera (4244) and Oligochaeta (2120). On a per-month basis, however, Oligochaeta was the most abundant group, occurring in greatest numbers during 6 of the 12 months sampled: October, November, and December 1973, and January, April, and June 1974. Ephemeroptera, the second most abundant group reported during the study period, was found to be the most abundant group during February, May, and July 1974. Diptera, the third most abundant group, was numerically dominant in September 1973 and in March and September 1974. Odonata was found sporadically.

In February 1974, Ephemeroptera and Oligochaeta were collected the most often. Fifteen Plecoptera (stoneflies) were found in the March samples and thirty were present in the April samples.2.2.1.10 Fish Results of the fish sampling by all methods from September 12, 1973, through November 1, 1974, are presented in Table 2.2-20. A total of 31 species, representing 8 families of fish, were collected during the 1973 through 1974 monitoring program, compared with a total of 42 species collected during the 1972 through 1973 baseline study.Carpsuckers (Carpiodes sp.) were the predominant species collected during the 1973 through 1974 program, accounting for 40.3% of the total number of fish collected.

Channel catfish (Ictalurus punctatus), most of which were collected by hoop nets, accounted for 19.1% of the total catch, and carp (Cvvrinus carpio) accounted for 13.0%.The greatest differences between the 1973 through 1974 monitoring program collections and the 1972 through 1973 baseline study were the greater numbers and relative abundance of channel catfish collected during the 1973 through 1974 program and the greater variety of minnows (Pimephales sp.), catfishes, and sunfishes (Lepomis sp.) collected during the 1972 through 1973 study.Commercial fish accounted for 62.4% of the total number of fish collected during the 1973 through 1974 monitoring program (see Table 2.2-21). The classification of species into commercial, game, and forage types followed a classification of Illinois species presented by Lopinot (1968). Ccmmercial fishing is restricted on the Rock River. The river is divided into five 2.2-10 RS-14-051 Enclosure, RAI AQ-lf Response Page 16 of 178 Byron ER-OLS sections by the Illinois Department of Conservation, and only one commercial fisherman of partnership receives approval to fish in a section.of the 31 species of fish collected in the 1973 through 1974 sampling program, 14 were game species. Although game fish accounted for over 30% of the total number of fish collected, 62%of the game fish (or 19% of the total number of all the species caught) were channel catfish. The composition of fish samples taken from river Stations R-2, R-3, and R-4 did not differ substantially by station in numbers of either species or fish.The percentage of forage fish in samples from river Stations R-1 through R-5 was only 7.6% during the 1973 through 1974 monitoring program, as compared with forage fish reported in the 1972 through 1973 baseline study. The decrease in the relative abundance of forage fish was due in part to a decrease in seining effort at a variety of shallow areas and to the increase in the relative abundance of channel catfish in the 1974 river samples that resulted from the addition of hoop netting to the sampling program.Station S-3 samples were composed of a greater number of species, particularly game species, than any other stream station samples.Most of the species collected from the stream stations were also collected from the river stations (see Table 2.2-20) because the stream stations were close to the river and the tributary mouth areas are used by many river species for feeding, spawning, and protection from river currents.

only two species, the sand shiner (Notrovis stramineus) and the hog sucker (Hypentelium nigricans), were collected exclusively at stream stations.

Both of these species also occurred in the main river, however, as observed during the 1972 through 1973 baseline study.Seasonal changes in the distribution of fish within the study area may be indicated by the sampling results; however, daily fish movements due to weather and river flow conditions would also influence sample size and composition.

Since all fish sampling was conducted in shoreline areas, the absence or decline in the number of a fish species may be attributable either to local movements from shallow to deep water or to movements to upstream or downstream areas of the river for purposes such as spawning or feeding. Carp and carpsuckers were generally present at the sampling stations throughout the 1973 through 1974 study.Game fish, other than channel catfish, were not collected in sufficient numbers to indicate seasonal changes in distribution.

Channel catfish appeared to inhabit deeper mid-channel areas of the river during the cooler months and to inhabit shoreline areas or the entire river during the warmer months, as indicated by the catfish catches per unit effort shown in Table 2.2-22.Condition factors (K) were determined for individuals of 14 species of game fish (including catfishes) collected from the river and stream stations from September 12, 1973, through November 1, 1974. To present the data, K values were reported by 2.2-11 RS-14-051 Enclosure, RAI AQ-1f Response Page 17 of 178 Byron ER-OLS season and by the total length range for each species (see Table 2.2-23). The low numbers of fish collected within each season and the length range for. most species made valid interpretations of condition factor data difficult.

During the spawning season (March and April), more variability in condition factors would be expected within each length group because of probable groupings of gravid males and females, and gravid males and spent fish. In most length groups, catfish collected in March and April 1974 had the greatest range in K values for all months represented (see Table 2.2-23). Available literature on condition factors of channel catfish is conflicting with regard to sex differences and seasonal differences (Carlander 1969). Differences in reported data appeared to be caused by a variety of ecological conditions, including food availability and the standing crop of fish. In the Rock River, mean K values for channel catfish were higher in October and November 1974 than in September and October 1973.Seasonal trends in mean K values were not indicated for channel catfish collected in this study.Other fish species were not collected in sufficient numbers to allow for a discussion of the condition of the fish; however, the range, mean, and standard deviation of K values for all the game fish collected were calculated; these appear in Table 2.2-23.The ages of 237 fish of 10 game species (including channel catfish) were determined from annular rings on scales, or in the case of channel catfish, on cross sections of, pectoral spines.All the fish were collected from January 21 through November 1, 1974. For each determination, January I was assumed to be the beginning of each age class. The roman numerals in Table 2.2-24 indicate the number of winters the fish had passed through. A sufficient number of channel catfish were collected and aged to allow for the construction of length-frequency graphs for each collection period (see Figures 2.2-2 through 2.2-6). The total length ranges of each determined age group were superimposed on the length-frequency graphs. The results may be compared with the total length-age group data for each species as reported in published literature; these data are presented in Table 2.2-25.The average lengths of channel catfish at calculated age groups (see Table 2.2-24) were slightly greater than those reported by Appelget and Smith (1951) for channel catfish collected in the vicinity of Lansing, Iowa (see Table 2.2-25). Although the channel catfish collected from the Rock River appeared to have a relatively fast growth rate, the oldest catfish collected was in age group IV and the maximum catfish total length was 38.5 centimeters.

The greatest number of age group IV catfish were collected in April 1974. Age group II catfish predominated in the July 1974 samples. Age group 0 catfish (larvae catfish), as well as young-of-the-year (less than 1 year old) of other species, were probably not collected because the hoop-net mesh size was too large to retain them. Length-frequency and age data for nine game species other than channel catfish are also presented in Table 2.2-24.2.2-12 RS-14-051 Enclosure, RAI AQ-lf Response Page 18 of 178 Byron ER-OLS 2.2.1.10.1 Creel Survey A creel survey was conducted along both sides of the Rock River between Byron and Oregon, Illinois, from May 5 through September 28# 1974. Figure 2.2-7 shows the fishing sites that were surveyed.

The survey area was covered 5 days per week during June, July, and August 1974, and 2 days per week during May and September 1974. During these periods, 965 anglers were interviewed (see Table 2.2-26). Based on data presented in Table 2.2-26, 0.204 fish were caught per rod-hour of fishing. This catch rate is one-half that determined during the 1972 through 1973 baseline study, when creels were surveyed along the same stretch of river from August 19 through September 16, 1972, and from March 28 through August 31, 1973. During the 1974 survey, the highest success rate was in June, followed closely by May and July (see Table 2.2-27). Over one-third of the total 3980 rod-hours were reported for August even though fishing success was relatively low during that month. The most heavily fished sites in the survey area were below the dam at Oregon and near the mouth of Mud Creek (see Table 2.2-28). Success rates varied considerably along the river. The Woodland Creek mouth area had the highest fishing success rate although it represented only 0.4% of the total number of rod-hours included in the survey.Sites that were both relatively heavily fished and had high catch rates were all located either just above or below the Oregon dam.The Oregon dam area was also a popular fishing site during the 1972 through 1973 baseline survey (it represented 67.9% of the total number of rod-hours).

Table 2.2-29 lists the fish species caught by fishermen surveyed during the 1974 creel survey. Eight species reported during the 1972 through 1973 baseline creel survey were not reported in 1974. Of those listed in Table 2.2-29, the redear sunfish (Lepomis microlophus), black crappie (Pomoxix nigromaculatus) white bass (Morone chrysops), yellow bass (&_ mississippiensis), walleye (Stizostedion vitreum) , hog sucker (Hypentelium niQricans), mooneye (Hiodon terqisus), and American eel (Anguilla rostrata) were not reported during the 1972 through 1973 baseline creel survey. The redear sunfish, mooneye, and American eel were not collected by sampling methods in either the 1972 through 1973 baseline study or the 1973 through 1974 monitoring study. The mooneye and American eel were present in fish collections taken from the Rock River from 1961 to 1969 (Rock 1969). The American eel however, is reported to exist there only as an oddity. The redear sunfish occurs sporadically in southern and central Illinois, mostly through human introduction (Smith 1965). It is suspected, therefore, that this species has been similarly introduced to the Rock River system. Channel catfish and carp were predominant fish in the creels, accounting for 35. 8% and 32.3% of the catch, respectively (see Table 2.2-30). Suckers, yellow bullhead (Ictalurus natalis), and bluegill (Lepomis macrochirus) were also important sport fish, based on the 1973 through 1974 survey. The order of abundance of fish species for this survey was very similar to the results of the 1972 through 2.2-13 RS-14-051 Enclosure, RAI AQ-lf Response Page 19 of 178 Byron ER-OLS 1973 baseline survey. Most species were caught in greatest numbers near the Oregon dam, although catfish, carp, sucker, bullhead (Ictalurus natalis), buffalos (Ictiobus bubalus , and sunfish were also relatively abundant in the Mud Creek mouth area (see Table 2.2-31). Buffalo were not caught in the area immediately above or below the Oregon dam. The total lengths for each species (or closely related species) caught by fishermen were within the same length ranges as those of the fish collected during the quarterly biological sampling program (see Table 2.2-32). Very few channel catfish over 38.1 centimeters were present either in creels or in quarterly samples. Catfish were by far the most preferred species by fishermen (see Table 2.2-26).2.2.1.10.2 Eggs and Larvae Fish eggs and larvae were sampled monthly at Stations R-1 through R-5, S-3, S-5, and S-6 from April 23 through July 3, 1974. The results of each sampling are presented in Table 2.2-33. Sixty fish larvae (see Table 2.2-34) and two fish eggs were collected from the study area. The predominant larvae collected belonged to the minnow family. Carp accounted for 40% of the total number of. larvae collected.

In addition to minnows, fish larvae included white suckers (Catostomus commersoni , sunfish, temperate bass (Morone sp.), and log perch (Percina caDrodes).

The presence of a high relative abundance of carp larvae in the samples was probably a result of the large number of eggs that each mature female is capable of depositing and the spawning habits of carp. Fish larvae samples indicated that carp larvae did not enter the drift component of the river biota in 1974 until after the May 15 sampling.

Although Rock (1969) listed the log perch as occurring in the Rock River, based on collections made between 1961 and 1969, adult.log perch were not collected in either the 1972 through 1973 baseline study or the 1973 through 1974 monitoring program. The higher numbers of larvae collected at the river Stations R-2, R-3, and R-4 may reflect the greater amount of water filtered at those stations or the presence of suitable spawning sites upstream of these stations.

Several emergent and submergent weed beds were present in the section of the river just upstream of Station R-2. In addition, three tributaries enter the river between the Byron Station and Station R-2. Many species of fish require or prefer weedbed areas or tributaries for spawning.2.2.2 Terrestrial Environment 2.2.2.1 Introduction Although a detailed study of food habits, trophic relationships, and energy flow patterns was not part of the monitoring study, generalized food webs were constructed based on site-specific faunal data gathered from the baseline survey and the monitoring study to date. Two such food webs, for forest and meadow habitats during the growing season, were constructed for 2.2-14 RS-14-051 Enclosure, RAI AQ-lf Response Page 20 of 178 Byron ER-OLS Z4 CO= 4>1 ,-4 C'4 z P4 H 0 Hw U3 N.0 .4 4J 4J 4 0 0 0 4J4 4) '4 0.>1 > >4.4-) ) 4.) to I U to: w $ 0 00 o 0 a )t$4 k4 P-4.)4j ( 4) Q)0- 4 4J W U 4 0.0 0 .0 Q' 0444) O 4).w a) 4) $4..-4.-.0 r.4)0 W) w w w -v m'4 '4k0a.- .4 4) 4) 4) a 14-)44) 0.0$ 4-'4 044) -'4)44 4) '14 )Q 4) 0 (d4) 0 44)4 to J 0. 4)w C 0~ ~ ON4144..w) o'. 0 4) ' 0 4)) .)1. W4 )-.4 C) --4 U -)U 0> d)4*4J g-I 4J-0r. C OJ-r.4&flE400 0r~.' 0 .'4 0 r.l ra 'j0 w O m -0 m :.r. 010 044 04 04) >1-Q)) 0) Q ) c4-)'4 U2A) > )4 > > -'q44)w 0.1 -.04) -.04 M.0 04-) 0)-14J04-04J M E0 4) 0 (d 0d U >d D 4 M (D.A4 CL0 0d). '4Q))-1 'ý4 .U) W40 W $.-44 W kV )t A 004) 4) 4 U) 'd'-4.0a 41 -'4 OM0 4) '48 -'. 0 0)(4.0 --C: U0 t '04040 0) 0; 0) ()14)>4) -4 0D--A 40 04 U.0-. E 140.)r10 ..4)ýa,4) .14"440 0 14)V U) _) 4 -i.4 4) M ( El 4)V 1.iý 4)4) ' .)4 W .9U) '4 0 040 0-'0--4 r-4 4)14)4) 1. k -'.4 U)M'44)0C U).-4 to C a)QA.U'4 U r 0-00.90'40.4 1-4z 1.a4. ) D3 0M4 0 :3 r4 3 tr4 4) > 4) 0e 14 f ); 4r-44 -4 w 1 ) r M1.4 r1 5 0 W -4 4 4-4.-4) '0 U 4 4J 0) cc U 4)0 (d140 0 C)4 4) 0)0)4U 44) 0 4) 10'4k r00 r 0 Id'4 M 014)r4C 4 z0 w% a- -'4 9 4 4) 03 (d-'44 14) r.4 '41 0 '4 U)m4A )..4 )4~ 04) 4)4 C 4 %a ) )4 W W (100 1. Lý44) 0) t401 A0)4)400d 4) r14 0-4'414)m00 1. 4 w.r'44)4)C:

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SUMMARY

OF THE~ 1973-1974 A JAT!IC MONITORING PROGRAM FREQUENCY PARAMETER Phytoplankton

& Zooplankton Quantitative Quantitative Periphyton Diatometers Benthos Artificial Substrates Fish Fish Eggs and Larvae Fish Creel Census LOCATION R-1 through R-5, S-3, S-4, and S-5 R-l through R-5, S-3, S-4, and S-5 R-1 through R-5, S-3, S-4, S-5, W-1, and W-3 R-2, R-3, R-4 R-l through R-5 S-3, S-4, S-5, W-l, and W-3 R-2, R-3, and R-4 R-1 through R-5, S-3, S-4, S-5, W-1, and W-3 R-1 through R-5, S-3, S-4 and S-5 Study Area R-1 through R-5, S-3, S-4, S-5, W-1, and W-3 R-1 through R-5, S-3, S-4, S-5, W-1 and W-3 R-1 through R-5, S-3, S-4, S-5, W-1, and W-3 R-1 through R-5, S-3, S-4, S-5, W-l, and W-3 R-1 through R-5, S-3, S-4, S-5, W-1, and W-3 R-1 through R-5, S-3, S-4, S-5, W-1, and W-3 R-1 through R-5, S-3, S-4, S-5, W-l, and W-3 September and October September and October 1973 Monthly, beginning in September September and October September and October 1974 January, April July, and October Bi-Weekly, June through September January, April, July, and October January, March, May, July, September, and November January, April, July, and October Monthly, January to August January, April, July, and October April, May, June, and July May through September January, April, July, and October April and October January, April, July, and October Bacteria September and October Fish Muscle and Liver Tissue Water Chemistry (22 parameters)

Quality Control Analyses Diurnal Dissolved Oxygen Trace Metals (Cd, CO, Fe, Cu, Hg, Zn, Pb, Cr)Physical Parameters (Temperature, current velocity, turbidity, depth, light pene-tration, transparency)

October September and October October July September and October Selptember and October May, July, and September January, April, July, and October January, April, July, and October 2.2-41 RS-14-051 Enclosure, RAI AQ-lf Response Page 23 of 178 Byron ER-OLS C4 E-4 H U. r 0)4.1 0 z 4)4.H 0 c0 0 1'4 0 0 1 w 0 In 10*4In 0 0 %to CO 0 %0>4 U-~ 0 00 In r-0-a 0n 0 4 004 rn >-4(0 tax r-1-400 CO 0% IN E -400 ko tn M a% U! -4* ( *E- 0% r'0n a.OC2-4 %D.-4 'a IN 0 0'41 0 In (N (N 0%(N an'4.(.4 0 (NO ('4 -'a 4'44' ~fl 'a 0 an M CO Ln CO C4'B 0D'a (N-4 ,-4 0%.'4.In r- 0 0*44 C0 UA qr U) Uin M' If M' -4.4 0i 0 0: r4 .- -'a 4 (N ('4 '4 0-(N -4 0 ('4 0 (N-4 0 U.)v44 -4 (N H4. (N 0I C. 0. 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• v LM 0 is Li r-N4 en 0-4 -4 r4 N-4 0 to%0 0-.4 t0 LA Go N 0 to 0 Pt t0 to O0 0.49d U 4 0 0 C, w tw 0 -Eý M rn m k C 00 V -4E Ch a% %O CC> n-wmn 4M P s i o NO-4 -4 N ,-4%0 C (" 0 in in-4 z C MOO 00 C4U 1-400C 0 IM -4 I in H N1-4 0EýO 0I z Pti Z mt Z+ in M to C;LA 0% %0 r-%0 C4 LO N -4 N4 0 Ln LA 0 CO-4 Mo (n P 4 tO U! 4, =-,-4 9 LA a Q o tO to0 is N4 L 0 N IV%0 qw Cn (" 4 r4 -4 N N 0 0 CD N4 -4 A- LA 1-4 is to 0 LA is 0 H E-4 0 0 z 0 AýZP -4 0 0 W z C His W -P P 4 0 0 Pt to Nl 0%,-4 -,4 -.4-4 0 0 0 is 0%0 v LA-4 0 0%0 ,-4 to L ,-4 0 0 N4 .4%a 0% %0-4 40 0 r-4 4 to 0%C;0 0 r-0 0 rt 0 0.-4 el in M 0 v 0-4.4.en 0 0 LA %0 LA 0m Z i L o zA 0o I 0C o 0 0 o o ,-4$ 14 CO 0 N mt 0 to ,-4 0 0 0 r.4.Go 00 0 LA O t LA " LA In LA~4 N %0 o0 o o v v-4 4 4.1 P3 0 01 CO Mt CO 0 0 4.--A g 41 V 4)01.4.14 4 0 0 9n =n 41 U 0-4 ti Go C4 14 0.2.2-51 RS-14-051 Enclosure, RAI AQ-lf Response Page 33 of 178 Byron ER-OLS TABLE 2.2-4 TRACE METAL ANALYSIS OF WATER SAMPLES COLLECTED FROM ROCK RIVER AND TRIBUTARY STREAMS (All Values in ug/liter or ppb)TRACE METALS STATION April 30, 1974 R-1 R-2 R-3 R-4 R-5 Cd Co .Cr Cu Fe AL. Mn Ni Pb Zn 30.0 40.0 30.0 10.0 20.0 30.0 10.0 30.0 20.0 30.0<100<100<100<100<100<100 100'100<100 4100 10.0 <10.0 10.0 <10.0<10.0 <10.0<10.0 <10.0 10.0 <10.0<10.0 <10.0 10.0 <10.0 20.0 .10.0 1n.0 <10.0<10.0 <10.0 S-3 S-5 S-6 W-1 W-3 July 30, 1974 R-1 R-2 R-3 R-4 R-5 10.0 30.0 20.0 20.0 20.0<10.0<10.0 10.0 30.0<10.0 S-3 S-5 S-6 W-1 W-3 100.0 30.0 <10.0 100.0 10.0 <10.0<100.0 <10.0 <10.0<100.0 <10.0 <10.0<100.0 10.0 <10.0<100.0 10.0 <10.0<100.0 <10.0 <10.0<100.0 <10.0 <10.0 100.0 <10.0 <10.0<100.0 10.0 <10.0<100.0 <10.0 <10.0<100.0 <10.0 <10.0<100.0 <10.0 20.0<100.0 <10.0 90.0<100.0 <10.0 30.0-100.0 60.0 <10.0<100.0 <10.0 <10.0<100.0 <10.0 <10.0 100.0 <10.0 <10.0<100.0 <10.0 <10.0 60.0* 50.0* 50.0 100.0 110.0< 50.0 110.0 80.0 110.0* 50.0* 50.0 170.0 130.0 90.0< 50.0< 50.0 140.0 90.0< 50.0< 50.0 260.0 360.0 260.0 510.0 370.0 470.0 490.0 230.0 130.0 50.0 40.2<0.2<0.2<0.2<0.2<p.2<0.2<0.2<0.2<0.2<0.2<0.2<0.2<0.2<0.2<0.2<0.2<0.2<0.2<0.2 0.2<0.2<0.2<0.2<0.2<0.2'0.2'0.2<0.2<0.2 20.0 20.0<10.0 10.0<10.0 20.0 50.2 30.0 30.0 60.0 10.0 20.0<10.0<10.0<10.0 10.0 30.0 10.0 70.0 40.0 70.0 60.0 A0.0 70.0 90.0 90.0 50.0 90.0 70.0 60.0 220.0 240.0 230.0 210.0 210.0 220.0 150.0 140.0 160.,0 200.0 190.0 160.0 230.0 180.0 200.0 240.0 150.0 160.0 190.0 220.0 200.0 240.0 210.0 250.0 260.0 200.0 180.0 180.0 210.0 160.0 20.0 19.0 15.0 15.0 15.0 19.0 19.0 27.0 19.0 15.0 9.0 15.0 6.0 12.5 10.0 9.0 9.0 10.0 10.0 6.0 15.0 27.0 25".0 19.0 24.0 25.0 15.0 44.0 55.0 25.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0<10.0'10.0<10.0<10.0<10. 0 17.0 39.0<10.0 17.0 11.0<10.0 13.0<10.0<10.0<10.0 October 8, 1974 R-1 R-2 R-3 R-4 R-5<0.2 0.4 0.2 1.3 0.7 0.9<0.2 0.5<0.2<0.2 S-3 S-5 S-6 W-1 W-3 2.2-52 RS-14-051 Enclosure, RAI AQ-lf Response Page 34 of 178 Byron ER-OLS TABLE 2.2-5 CUMULATIVE PHYSICAL DATA MID-CHANNEL LIGHT PENETRATION DEPTH)DEPTH CURRENT SURFACE VELOCITY SECCHI DEPTHa (nO)DATE (ft) (ft/sec) (in) 50% 25%SAMPLING LOCATION: 11 Sept 73 7.0 16 Oct 73 6.6 28 Jan 74 10.0 30 Apr 74 9.9 30 Jul 74 7.0 8 Oct 74 4.0 SAMPLING LOCATION: 11 Sept 73 6.6 16 Oct 73 9.2 28 Jan 74 11.4 30 Apr 74 10.1 30 Jul 74 12.0 8 Oct 74 9.0 SAMPLING LOCATION: 11 Sept 73 7.6 16 Oct 73 8.0 28 Jan 74 14.2 30 Apr 74 11.0 30 Jul 74 11.0 8 Oct 74 12.0 SAMPLING LOCATION: 11 Sept 73 8.7 16 Oct 73 10.3 28 Jan 74 14.4 30 Apr 74 12.8 30 Jul 74 11.0 8 Oct 74 11.0 SAMPLING LOCATION: 11 Sept 73 7.9 16 Oct 73 7.2 28 Jan 74 11.4 30 Apr 74 9.0 30 Jul 74 10.0 8 Oct 74 8.0 ROCK RIVER STATION R-I 2.75 3.0 2.95 3.47 2.66 2.46 ROCK RIVER STATION R-2 1.40 2.00 3.05 2.73 1.05 1.02 ROCK RIVER STATION R-3 1.30 2.20 3.58 2.49 1.02 0.82 ROCK RIVER STATION R-4 1.30 1.75 3.38 2.73 0.98 0.92 ROCK RIVER STATION R-5 1.00 1.70 2.95 2.09 0.85 0.62 10.6 9.7 7.7 4.3 9.7 15.0 13.0 14.6 6.3 4.0 10.3 16.0 13.7 12.3 6.3 4.0 11.7 15.0 14.7 14.3 7.7 4.4 11.7 16.0 12.0 13.3 5.7 3.8 10.3 14.0 18.6 11.7 6.3 6.0 18.3 22.0 25.0 18.0 6.0 6.8 24.3 30.0 24.0 18.0 5.7 7.7 24.7 35.0 24.0 19.0 5.7 6.7 22.7 29.0 25.0 18.0 3.3 6.0 24.0 25.0 26.0 17.7 12.0 8.0 27.0 35.0 34.0 27.0 8.0 9.0 32.0 42.0 33.4 26.3 7.7 9.7 34.7 43.0 33.7 30.3.8.0 8.4 35.3 38.0 34.7 24.0 6.0 o8.7 30.0 36.0 aMean of three determinations at mid-channel.

2.2-53 RS-14-051 Enclosure, RAI AQ-lf Response Page 35 of 178 Byron ER-OLS TABLE 2.2-5 (Cont'd)MID-CHANNEL LIGHT PENETRATION DEPTIa DEPTH CURRENT SURFACE VELOCITY SECCHI DEPTHa (in)DATE (ft) (ft/sec) (in) 50% 25W SAMPLING LOCATION: 11 Sept 73 0.5*16 Oct 73 1.6 28 Jan 74 b 30 Apr 74 5.1 30 Jul 74 4.0 8 Oct 74 2.0 SAMPLING LOCATION: 11 Sept 73 4.0 16 Oct 73 2.8 28 Jan 74 7.4 30 Apr 74 3.9 30 Jul 74 5.0 8 Oct 74 1.5 SAMPLING LOCATION: 28 Jan 74 7.0 30 Apr 74 4.2 30 Jul 74 6.0 8 Oct 74 1.5 TRIBUTARY STREAM STATION S-3<0.10'0.10 b<0.10<0.10<0.10 TRIBUTARY STREAM STATION S-5 0.50 1.00 0.13<0.10<0.10<0.10 TRIBUTARY STREAM STATION S-6 0.10 0.14<0.10<0.10 C le7 15.7 b 6.3 12.3 14.0 14.0 18.3 7.3 9.7 13.0 16.0 9.7 9.0 14.0 25.0 C 12.0 b 10.4 7.3 23.0 NAd e 5.3 24.3 6.7 c 16.0 b 12.7 12.0 0 NA*7.0 Bottom 10.0 C 16.7 22.3 Bottom 7.0 15.7 25.0 c SAMPLING LOCATION:

WOODLAND POOL W-I 11 Sept 73 <0.5 <0.10 16 Oct 73 28 Jan 74 30 Apr 74 30 Jul 74 8 Oct 74 0.5 0.7 0.7 0.2 0.5 0.10 1.50<0.10<0.10<0.10 SAMPLING LOCATION: 11 Sept 73 <0.5 16 Oct 73 0.5 28 Jan 74 0.5 30 Apr 74 0.5 30 Jul 74 0.3 8 Oct 74 0.4 WOODLAND POOL W-3<0.10 0.10 1.5 0.10 0.10<0.10 C C c C c c c C c c c c c c c C c c c C c C C c C C c C C c c c c c C.C C.aMean of three determinations at mid-channel.

bPhysical conditions at time of sampling prevented obtaining data.CWater too shallow to obtain reading.dNA = Not Available.

eStream completely shaded by trees.2.2-54 RS-14-051 Enclosure, RAI AQ-lf Response Page 36 of 178 Byron ER-OLS TABLE 2.2-6 CUMULATIVE BACTERIA DATA (Counts Presented as Numbers per 100 milliliters of Sample)DATE TOTAL TOTAL FECAL BACTERIAa COLIFORMa STREPTOCOCCUSa SAMPLING LOCATION:

ROCK RIVER STATION R-1 11 Sept 73 16 Oct 73 28 Jan 74 30 Apr 74 30 Jul 74 8 Oct 74 980,000 235,000 735,000 1,820,000 1,290,000 10,700 1,560 19,000 45,000 27,500 15,500 600 SAMPLING LOCATION:

ROCK RIVER STATION R-2 11 Sept 73 16 Oct 73 28 Jan 74 30 Apr 74 30 Jul 74 8 Oct 74 975,000 340,000 800,000 1,650,000 1,990,000 15,900 3,600 14,000 49,500 22,000 16,500 1,300 SAMPLING LOCATION:

ROCK RIVER STATION R-3 10 54 605 695 105 0o 15 109 595 765 90 140 10 139 755 765 90 90 10 99 635 850 75 280 11 Sept 73 16 Oct 73 28 Jan 74 30 Apr 74 30 Jul 74 8 Oct 74 FECAL b 78 1,250 1,700 3,900 165 55 1,090,000 465,000 755.000 2,265,000 1,150,000 18,150 4,000 14,000 42,000 34,500 19,500 2,200 SAMPLING LOCATION:

ROCK RIVER STATION R-4 11 Sept 73 16 Oct 73 28 Jan 74 30 Apr 74 30 Jul 74 8 Oct 74 805,000 245,000 820,000 1.765,000 1,140,000 18,950 2,300 10,500 45.500 24,000 12,000 2,000 SAMPLING LOCATION.

ROCK RIVER STATION R-5 11 Sept 73 16 Oct 73 28 Jan 74 30 Apr 74 30 Jul 74 8 Oct 74 630,000 350,000 765,000 2,465,000 630,000 13,750 880 11,500 36,500 28,500 7,500 3,400 20 114 695 1,230 35 70 1,800 1,100 1,300 2,450 125 195 200 1,150 1,300 2,400 45 185 115 1,100 1,750 2,500 105 1,200 44 650 2,100 1,450 55 605 42 320 1,100 2,250 60 1,230 77 1,300 975 2,950 975 90 775 2,950 1,585 3,595 FC/FSc 7.8 23.2 2.8 5.6 1.6 0.7 12.0 10.1 2.2 3.2 1.4 1.4 20.0 8.3 1.7 3.1 0.5 2.0 11.5 11.1 2.8 2.9 1.4 4.3 2.2 5.7 3.0 1.2 1.6 8.6 0.07 1.9 1.4 3.2 0.3 4.0 SAMPLING LOCATION:

TRIBUTARY STREAM STATION S-3 11 Sept 73 16 Oct 73 28 Jan 74 30 Apr 74 30 Jal 74 8 Oct 74 1,150,000 215,000 840,000 910,000 1,150,000 14,400 840 7,000 40,500 12,000 12,500 11,000 570 167 810 700 190 3:0 SAMPLING LOCATION:

TRIBUTARY STREAM STATIO33 S-5 11 Sept 73 16 Oct 73 28 Jan 74 30 Apr 74 30 Jul 74 8 Oct 74 3,900,000 240,000 580,000 2,285,OOC 800,000 7,100 1,850 7,000 34,530 10,500 7,030 250 335 795 695 1,1 G5 260 0.08 3.9 1.2 4.2 0.8 0.3 1.8 3.3 1.4 1.6 SAMPLING LOCATION:

TRIBUTARY STREAM STATION S-6 28 Jan 74 30 Apr 14 30 Jul *4 9 Oct 74 355,000 1,925,000 370,000 13,000 27,500 51,000 8,000 5,600 440 905 1,150 2,300 aMean of two determinations.

b bMean of two determinations after October 16 sampling.C Fecal Coliform to Fecal Streptococcus ratio.2.2-55 RS-14-051 Enclosure, RAI AQ-lf Response Page 37 of 178 Byron ER-OLS TABLE 2.2-7 CUMULATIVE TAXONOMIC LIST OF PHYTOPLA4KTON IN SAMPLES COLLECTED FROM ROCK RIVER AND TRIBUTARY STREAM STATIONS, SEPTEMBER 1973 THROUGH OCTOBER 1974 TAXA Bacillariophyta Centrales Cyclotella atomus C. meneghinian-a C. pseudostelligera Melosiraam uqa M distans M. granulata M. granulata v.angustissima M. varians MiTcrosipona potamos Steehanodiscus astrea S. dubius s. a-ntz-chii S. niagarae S9. minutus s_. TuiiEETis Pennales Achnanthes-minutissima Amphora valTs A. ovalis v. pediculus Calone--eilewisii Cocconeis placentula CyjbeIla prostrata C.tumnidta Cymatopleura solea Diatoma vulgar-i's-sp.Fragillaria capucina Gomphonema olivaceum G. parvulum Gomphonema sp.Gyrosigýa scalproides Hantschjia up.Navicula cryptocephala N. cryptocepala v.veneta N. pymea N. rhyncocephala N. rhyncocephala v.N. tripunctata N. triunctata v.schizonemoides N. viridula v. avenacea NiTtzschia acicularis N. amphibia.N. dissipata N_. hunarica.N. holsatica 97- ri~nearis Pennales (Cont'd)N. alEea N. siodea N. _tryblionela N__, trblionella v.victoriae Nitzschia sp.Nitzschia sp., Nitzschia sP.2 Surirella ovata SynedraacEn-a-stroides S. acus S. u- =na V__ sp.Chrysophyta Dinobyron divergens Chlorophyta Actinastrum hantzschii Ankistrodesmus convolutus A. falcatus Ankistrodesmus sp.Centractus sp.* Chlamydomonas sp.1*ChMX!aým-donas sp :2 C orella vulgaris Chlorella sp.Coelastrum sp.Cosmarium sp.5iy3osphaerium sp.Elakatothrix sp.Eudorina sp.Gloeoactinium limnecticum Golenkinia sp.Oph2 ý-ium sp.~sp.Oocystis sp.1 Oocystis sp.2 Pandorina sp.Pediastrum duplex P. siple Scenedesmus acuminatus S. anomalus S. arcuatus S. carinatus S. facIatus S97. Perforatus 97_u opMiensis 9S. sMithii S. sooi v. verrucosa s. iPn~osus Scenedesmus sp., Scenedesmus sp.2 Chlorophyta (Cont'd)Scenedesmus up.3 Scenedesmus sp.4 Scenedesmus sp.5 Schroederia spiralis Selanastrum sp.Sphaerocystis schroeteri Staurastrum sp.Tetrastrum staurogeniaeforme Treubaria.

sp.Cyanophyta Anabaena up.Chroococcus sp.Gomphosphaeria lacustris GOMphosphaeria sp.Oscillatoria op.Oscillatoria sp.1 9 c4 tis sp.Rhaph7iops9 mediterranea Rhaphiopsis sp.Euglenophyta Eug12"a sp.Phacus sp.Str"oTmonas sp.Trachelomonas sp.Pyrrophyta Ceratium sp.Gymnodinium sp.Cryptophyta Cryptomonas sp.2.2-56 RS-14-051 Enclosure, RAI AQ-lf Response Page 38 of 178 Byron ER-OLS ,-4 N 0n 0 0 E-4 0 1 >4 0 E-4 z E-1 01 z0 Cm c- -40 0 I ý 1 Oi :1 m- .-O dP1I %a -E-4.-4 0 4 v-~L 0O -4 VNO%L n mO I i v C4 0 0-1 0 s z Z0 z 0 0 in w LA S0 U1 m~e n 0% 1-4r-I CO % I1 C! I 1ý 900'. 0 .4-h40 0 m'Ch .-4 (A -4 O r-z 1-4 CD Ln a%0-4 H-4 a&4: 0% Ln en iw -N4 00-4.0 w 0 N r- -4*-. 0 N4 -1 LA 0 0-41 4)01-4 4-1 ci)o 0 4 0 4.0. 0 d).00>1 to z 0 HE 54 H12 (a 0 4J.r4-i.m 10'-1.4*0 H'.0-4 41 0.00i 4-1 4$4 >4 0, >4£ 0 (d 134044 4 04-0 0 0. 9 0.'-4 w w 0 4) 0 or N.-4 0 C: 1 N 4 >4 : >4 U00 ri Uw A E4:>4>4C -0. 04 0 1.4 000 Q C:0'4 U) N 004)V>1 0 C: 1-40.(aN- on 0'>31 :3 w0 0 CO 2.2-57 RS-14-051 Enclosure, RAI AQ-lf Response Page 39 of 178 Byron ER-OLS LA HN r- %0 Ch Ci I 0 U) (D CD1 CD 0 E-M)I-LO tn 14 0 U)0 (4 >4 ni n H 04 0>4 0 0 0 H E-4'4 E-4 (n 04 z>4'44 Ch Cn m'RV ('4 00 C 1 0% Cn 1w th L 0 00 I) LA C; C r-4 r4 tn it- r- ON* .0 ON m~ r-I m 4. ('4 0O H4 0-4.CD H 04>4 E-04 H4 wl 0 H 0 H E-4.e : Ln LA 1~ 00 4.4W4 CA CO I LA COw 0" 0 CYN Co%D 8 C%0 0 r.0 0 ('0'3:)4 44 0 4 4 -)1 ý4 0 >> .9-, o x4 4.1 44)*.I 0 0 41 w) U)r.4-1 rq.0 14>-41 >0 WOU 0 Da)> 04 r- > >V*14 rd 4J 1 41 1 t 0U) w 000).-r- 4 64 -a *4 $4 00) C.)Om 0490 to)~ to- W to F 0 01 $4 MX NHr- 04 IVM $4 (0 toI 03 t I L N r4.I LD SLA 0 LO C4.r4 10 0O 14 C., CA CD, Cyi 0%E-1 U 0 E~i U)>4 >4 1 E-40 IE-i 04crz U H 04 CA ~H 1 -5 UWzH P1~04 HZ A4 HZ Cn 0HIn H 2.2-58 RS-14-051 Enclosure, RAI AQ-lf Response Page 40 of 178 Byron ER-OLS TABLE 2.2-10 CUMULATIVE TAXONOMIC LIST OF ZOOPLANKTON IN SAMPLES COLLECTED FROM ROCK RIVER AND TRIBUTARY STREAM STATIONS, SEPTEMBER 1973 THROUGH OCTOBER 1974 TAXA Arthropoda Crustacea Copepoda Nauplius Copepodid (cyclopoids)

Cyclops bisuspidatus thomasi Cyclops vernalis Eucyclopsi ilis Cladocera Alonella sp.Bosmina longirostrissphaericus Daphnia galeata mendotae Diaphanosoma brachyur Macrothrix laticornis Scapholeberis kingi Ostracoda Immature Rotifera Asplanchna priodonta Brachionus angularis Brachionus bidentata Brachionus budapestinensis Brachionus calyciflorus Brachionus caudatus Brachionus guadridentata Brachionus urceolaris Brachionus sp.Cephalodella sp.Euchianis dilatata Filini-a longiseta Gastropus ltylifer Ke1licottia bostonensis Kellicottia longispina Keratella cochlearis Keratella guadrata Lecane bulla Lecane sp.Le adella sp.Philodina sp.Polyarthra spp.Pompholyx sulcata Rotaria sp.Synchaeta stylata Synchaeta sp.Testudinella patina Trichocerca ap.Trichotria tetractis Protozoa Arcella sp.Carchesium sp.Centropyxis aculeata Codonella cratera S2_?d sp.U ella mespiliformis Difflugia acuminata Difflugia oblonga Diffluiia sp.Epistylis sp.Paramecium sp.Pleurotricha sp.Strombidium sp.Tokophyra sp.Vaginicola sp.Vorticella sp.Other organisms found Tardigrada Echiniscus sp.Macrobiotus sp.Nematoda Annelida Oligochaeta Arthropoda Insecta*Chironomidae 2.2-59 RS-14-051 Enclosure, RAI AQ-lf Response Page 41 of 178 Byron ER-OLS m %D OdP 0 -Mo Hn Z ~0 rCa:0 E.4 rz 0) gi ~4~~ -!)O 0! -!- 19 f!0 !9r u~0 01 P 0 -ie N Zj.......0 1 OdPi r-1U)WO 0 HHI 4 0~H WW4 (-4 c-csU)H 0 ~~U HO H: .NN HOC C4~~~ M (-.0 % 4 fl.'1 'eý ac o .H r 004 nC Dr w C -0~ vdl r. en )-W 0 H LACN.4H C H E-10 H S 0 0 41)CA>03 0) -,4 Oj 4.) 4 0. 4.) t 4-4 4J 1044 Id k 414.,4 4. N m- 0 ra'14 0 O O -V 44 0 4.0 0 0 4J : 0 -x" 41 0% V.40 r -4 ..I 4.)(L) -4 0nO mi 0 r.)04 a m4 0) 0)63 0 ~-0 0 0 .0) 0 -1 ).0 44.X aa -,- 0)03 0 0)r 00 4- 14 .) 1>0 $ .0 > w 10 dPI IH LA0%C0r4 0"4fc'JOH 001%o CA)NO ZOCO '0j Hn C'O4 0i c0), Ii ' ' o0 H PA c4 4 0 11-1 0%DflO 0 H '4L 0 HE C4 r,',H 0 k %-0 W4) 4A '.nt r4 zH ~ ~ o~ o t 0000 0 IfaA0 f 01 a400 '04 0 L4J. 00 J$'0 w J) NU 0 m 0 N 0Om4) -'X:4 $4-140 14 H)(1 14 -4 4J1 H (d$14 4-4O ) iH 0)4 .44 0 k0 .01-- 41 0 C144 0 E- A# 0 E -2.2-60 RS-14-051 Enclosure, RAI AQ-lf Response Page 42 of 178 Byron ER-OLS TABLE 2.2-12 CUMULATIVE LIST Or ALGAE INHABITING PERIPHYTON COMMUNITY IN ROCK RIVER AND TRIBUTARY STREA0MS, SEPTEMBER 1973 THROUGH SEPTEMBER 1974 TAXA Bacillariophyta Centrales Coscinodiscus laustris C. rothii C ycro-teira atomus C. glomerata C. menephiniana C. pseudostelliera C. stelligera Melosira ambigua ff. distans M. granulata M. granulata var.angustissima M. italica M. varians Stegh-anidiscus astraea S. astraea var. intermedia S. hantzschii S. invisitatus S. minutus 9S. niagarae Pennales Achnanthes exigua A. hauckiana A. hunarica A.lanceolata.

A. lanceolata var. dubia A. minutissima Xmphiorora ornata Amphora normani A. ovalis A. o~ils var. oediculus AKmphora sb.Anomoeoneis sphaeroohora A. sohaerophora var.sculpta Aster ie1la formosa Caloneis amehisbaena T. bacillaris C. bacillum Caloneis lewisii C. ewTisii -var. inflata C. ventiosa C. ventricosa var.subundulata C. ventricosa var.truncata Cocconeis d iminuta C. pediculus C. placentula Cmatople-ura solea Cý-fbella hyall3n-a Pennales (Cont'd)C. obtusiucula C. sinuata C. Eiumiia C. ventricosa Diatoma tenue D. tenue var. elongatum U. vuare themia sorex Epithemia sp Eunotia curvata E. oectiinal-'

Fra~ilaria F. brevistriata var.caoitata F. construens F. crotonesis F. leptostauron var. dubia F. pinnata Frustulia rhomboides F. vulgaris Gomphonema abbreviatum G. acuminatum

d. acuminatum var.brebissonli G. acuminatum var.coronata G. oinstrictum G. gracilis G. lanceolatum G. olivaceum G. parvulum G. subtile G. sohaerophorum Gvrosigsma attenuatum Gyrosigma scalproides G. spencerii Gyroý5sigmýa -sp.Hantzschia amphioxys Hantzschia sp.Meridion circulare NaiTcula accomoda W. 7caitata N. captata var. hungarica Navgiula closterium N. confervacea N. cryptoceohala N. crvotocephala var.Seneta N. caus- data N. el-inensis N. exigua N. graclloides Pennales (Cont'd)N. heufleri N. eiufleri var.-leptoceoha la N. integra N. meniscula N. minima N. uEtica N. pe--l ulosa N. protracta N. ose-udo-rei1n ha r dti i N. uf N. raMlosa N. rai-osa var. tenella N. l rn- dtii N. reinhardtii var.ei tica N. reinhar tii var.reinhardtii N. rhyncocephala N. sanctaecrucis N. scutiformis N. scutelloides N. symetrica N. tenera N. -ýEipunctata var.schizonemoides N. viridula N. viridula var. avenacea Neidiumdubium NitcTs-ia acicularis N. acuminata N. amohibia N. angustata N. apiculata N. clausii Ni. aT~i-ipata, N. filiformis N. fonticola N. holsatica N. hungarica N. linearis N. obsidialis N. palea N. punctata N. siimoidea N. Spaculoides N. sublinearis N. thernialis N. tryblionella N. tryblionelia var.victoriae 2.2-61 RS-14-051 Enclosure, RAI AQ-if Response Page 43 of 178 Byron ER-OLS TABLE 2.2-12 (Cont'd)Pennales (Cont'd)N. vermicularis Opephora martyl Pinnularia biceps P. borealis P. brebissonii F. brebissonli var.diminuta P. interrupta P. subcapitata P.suaitat var.paucistriata P. sudetica P. Viride Finnu-l-iFa sp.Rhoicosphenia curvata Rh-opalodia jDibbaýStauroneis anceps S. smithii§7. ?oeýicenteron Surirella angustata S. biseriata S. b htwellii S. linearis S. ovata S. sp-rlis gyne-raactinastroides S. acus yne-dra delicatissima S. incisa S-. Aý- Itica S. pulchella S. radians var. radians S. rumpens S. rum~ens var. soctica s. socia.ul-na Tabe-laria flocculosa Chlorophyta Actinastrum hantzschii A. hantzschii var.fluviate Ankistrodesmus falcatus A. convolutus Characium ambignum C. simneticum Characium sp.2 Chlamydomonas spp.Chodatella C ophora sp.Closterum acerosum C. sphaericum Cosmarium sp.Crucigenia quadrata Dictvosohaerium puIchelum Dictvosphaer um sp.Dinor n sp.Eu orina elegans Eudorina sp.Gleocystis major Chlorophyta (Cont'd)G. vesiculosa Gleocystis sp.Gleobotrys limneticus Golenkinia diiata Gbnqrosira debarxana Micractinium pusillum Microspora sp.Oedoonium SF.O0cystis sop.-Pandorina, morum Pandorina sp.Pediastrum duplex P. simple Protoderma tetras P. virde PseUdulvella americana Radiofilum Sp.Scenedesmus abundans S. abundans var.l-ongicauda.

S. acuminatus S. ijuga var. alternans S.dimo S. opoliensis S. quadricauda S. quadricauda var.aIternans S. quadricauda var. westii S. guadricauda var. maximus Sphaerocystis schroeteri Staruastrum paradoxum Staurastrum sp.Stigoolonium nanum Stigeocolonium Sp.1 sp.2 Tetraedro~sp.

Tetrastrum staurogeniaeforme Treubaria sp.Ulothrix subconstricta U. zonata UloTh--r sp.1 Ulothrix sp.2 Westella linearis Green filament Unidentified coccoid green Chrysophyta Chrysococcus rufescens var. tripora Cyanophyta Anabaena sp.Chroococcus minutus Chroococcus Sp.CTlindrospermum sp.Gleocystis sp.Gomphosphaeria sp.Lyngbea sp..erlsmopedia so.Microcystis sp.Cyanophyta (Cont'd)Oscillatoria sp., Oscillatoria sP.2 mPhoridium tenue Unidentifiea-ue-green Euglenophyta Euglena acus p .E ena s Phacus TracKelomonas sp.1 Trachelomonas SPF2 Trachelomonas sp.3 Trachelomonas SP.4 Pyrrhophyta Peridinium sp.2.2-62 RS-14-051 Enclosure, RAI AQ-lf Response Page 44 of 1718 0 E-4 r'4 I CNI E-'0 E-4 P4 E-4 0 0 U 0 0 E-0 z 0 H E-4>4 H-Byron ER-OLS m C (4 H H 0 r C14 CAI w% m3 r-1 r-1 M.r(I r-H CzI E-4'4: 0 14 4)(U 0 4J U ai) 0 9-o 4 P rO .U 0 4-i 0 Wz E-4 0 U 0 2.2-63 RS-14-051 Enclosure, RAI AQ-lf Response Page 45 of 178 Byron ER-OLS TAUB 2.2-14 PRESENCE AND DISTRIBUTION OF BMETIC TAXA IN SAKPLES COLLECTED AT ROCK RIVu T2 3WT AND TRIBUTARY STREAM STATIONS, SEPTEMBER 1973 THROUGH OCTOBER 1974 DATE SUBSTRATE TYPEa 1/73 1073 2fl4 4/74 7/74 10/4 Mkt D St Ed fG: c~r FR Shell TAXA Platyhelminthes Turbellaria Nematoda Annelida Oligochaeta Tubificidae Limnodrilus cervix L. cervix var.L. meiteci L. hoffmeisteri var.L. udekemianus L. maumeensis E. clapared ianus r ter letoni AulodriluS americanus Tubifex tubifex po-taothr-ix daviensis Branchiura sEfly3, Immature withoutiEapi1-liform cbaetae Immature with capil-liform chaetae Naididae Nais variabilisfrici Lumbriculidae Onchytraeidae Unidentifiable oligochaete Terrestrial oligochaeta Hirudinea Erpobdella ounctata D0ijjnraZava Arthropoda Insects Diptera Chironomidae Cr tochironosus sp.OiEthcd~idus sp.Rhe-otantarsus sp.Paracladopelma sp.Diameso sp.=r tous sp.Conchapelopia sp.Paratanytarsus sp.Pse ctcicadius sp.Tan u sp.g hironomus sp.Labrundinia sp.Cladotanytarsus sp.Endochironomus sp.Clinotanypus sp.X X X X X X X X X X X X X I X X X X X X X X X X X X X X X X X X I X X X X S X X X X X X X X X X X X X X X X X X X X X X X X X X K S X S X S K I X X X S S X X K X X X X X X X X X x X X X X X X X S I x x X x xC S X I X I I I I'x K x X X X X X X X X X x iSK K X S* X I X X X S I S K I K I X.5 K X X K X X X X X X X X X X X X X S X X X X X X X X X X X X X X XX X X X X X X X X XX X X X X X X XXX X X X X X X aSee Table 2.2-18 for substrate type abbreviation explanation.

2.2-64 RS-14-051 Enclosure, RAI AQ-lf Response Page 46 of 178 Byron ER-OLS TABLI 2.2-14 (Cont'd)TAXA Parachironomus up.Coelotanu 9 Eikleffiilla op.alopsectra 8p.Polpedlum5sP.

Chlrconomu-s sp, Micropaf9eca op.Tricholadius up.Trissocladius sp.Dicrotendipes 8p.erili-a sp.Tanytarsus up.M yto~tendipee sp.Parilauterorniella 99.Procladius sp.Pentaneurini adult pupa Tabanidae immature Psychodidae Ceratopogonidae Tipulidae Limnobhila sp.Simuliidae Prosimulium up.Empididae Anthomyi idae Adult dipteran Ephemeroptera Potamanthus up.Stenonema sp.Baetis op.Caens sp.-ric-rythbodes sp.Baetnsca sp.limbata Heptageniidae Trichoptera Leptocella sp.Cheumatopsyahe 5p.Hyyrojpsyhe sp._!ly.entropus ap.Tr aenodes sp.pupa adult Odonata Dromogomphus up.I bus sp.Ugophus p.Soaltioihora up.Hemiptera Lygaeidae Bomoptera Apbididae (terrestrial)

DATE SUBSTRATE TYPE 2L73 I1073 2/14 4/4 7/74 10f4 ME l Ht Sd f jrMctF Shel X x X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X x X X I .X X X IX X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X XX X X X X X X X XX X X X X X X X x X X XX X XXXX X X X X X X X X X X X X X X X X X x X X X X X xX X XX X X XX X X X X XXX X X X X X X X X X X X X X X X X X X X K I X X X X X X X X X X X X X X X X X X X K X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X I X X X X X X X X X X X X x X X X X X X X X X X X X X X 1K IX X X. X X X X X X X X X X X X X X X X X X I I aSee Table 2.2-18 for substrate type abbreviation explanation.

2.2-65 RS-14-051 Enclosure, RAI AQ-lf Response Page 47 of 178 Byron ER-OLS TA8ZB 2.2-14 (Cont'd)DATE MSU3SRATE T~St Sd fGr cGr PR Stierl TAXA IZll /7 /47/41/414 1)~Coleoptera Elmidae ubraphia sp.StenemRis sp.Unidentifiable Hydrophilidae Derosus sp.K to2ilus sp .Ta t1u aD.Dytiscidae Agabus sp.D atcus sp.Rantus sp.Un'entifiable Hydroporinae Crustacea Ostracoda Amphipoda Gammarus sp.Isopoda Asellus intermedius Arachnida Ctenizidae Acari Molluscs Gastropoda Amnicola sp.egmnaeasp.

Ph a ap.amIelasp.Sphaeriun transversum Lasmigonia compressa X X X X X X X X X X X X X X X X X X X X X X X X X X X X x X X X X X X X x X X X X X X X X X X X X X X I X X X X X X X X X X X X X X X X x I X X X x X X x X X X X X X TOTAL 43 24 33 37 48 56 40 11'40 77 43 93 17 3 asee Table 2.2-18 for substrate type abbreviation explanation.

2.2-66 RS-14-051 Enclosure, RAI AQ- If Response Page 48 of 178 Byron ER-OLS TABLE 2.2-15 KEY TO BOTTOM TYPES SYMBOL BR Bo CR FR cGr fGr Sd St D P Mk C DEFINITION Bed rock Boulders Coarse rubble Fine rubble Coarse gravel Fine gravel Sand Silt Detritus Peat Muck Clay CHARACTERISTICS Rock strata Rocks over 12 inches in diameter Rocks 6 to 12 inches in diameter Rocks 3 to 6 inches in diameter 1 to 3 inches in diameter 0.125 to 1.0 inches in diameter Smaller than fGr Very fine grittiness Undecomposed plant debris Partially decomposed plant material Black, decomposed organic matter Compact, sticky Source: Adapted from Lagler (1956).2.2-67 RS-14-051 Enclosure, RAI AQ-lf Response Page 49 of 178 Byron ER-OLS TABLE 2.2-16 OCCURRENCE OF SUBSTRATE TYPES IN BENTHOS SAMPLES COLLECTED AT ROCK RIVER, SEPTEMBER 1973 THROUGH OCTOBER 1974 SUBSTRATE TYPEa Mk Nh/Sd Mk/St Mk/fGr Mk/D Mk/Sd/fGr 9/73 14 13 10/7 3 12 10 2/74 18 1 4/74 7/74 10/74 TOTAL 44 3 27 9 2 11 3 6 6 3 6 3 3 0 D St St/Sd Sd Sd/f Gr Sd/cGr Sd/fGr/cGr fGr fGr/cGr cGr FR 9 1 3 7 8 2 9 14 14 10 7 3 3 2 5 11 I A 9 13 9 2 6 4 8 2 18 35 52 4 19 7 19 2 55 8 3 12 12 6 12 10'1 1 Shells 1 1 aAdapted from Lagler (1956). Explanation of abbreviations in Table 2.2-15.2.2-68 RS-14-051 Enclosure, RAI AQ-lf Response Page 50 of 178 Byron ER-OLS TABLE 2.2-17 MACROINVERTEBRATE TAXA IN SAMPLES COLLECTED AT ROCK RIVER PUN SEPTEMBER 1973 THROUGH SEPTEMBER 1974 TAXA Platyhelminthes Turbellaria Annelida DATE OP SAMPLING 92M3_1/73

= 1/73 17 1/7 2/77 3/77 4/74 /74 7/74 2M X X X x x Oligochaeta Tubificidae Tubifex tubifex I-ydilu- templetoni Limnodrilus hoffmeisteri X X L. hoffmeisteri var.L. K I E7. laperedianus Xx X L. cervix var. x Klod-iflus americanus Branchiura go y Potamothrix Meolvyensis X Immature withjut capilliform chaetae X X Immature with capilliform chaetae X X Enchytraeidae x x K x K'C x x x x x x x x K K K x K x x X x x x x x x X x x X X x x x x x X* x X x x x x x x x x x x x X X X K K X X KX x X X X X Naididae Naie sp.95-15 communis Na-q- is ilils varia=ii Paranais frici PFarana-t-s -toralis Homochta e a-i-iina Pristina osE-r-n-Pristin -l-ngiseta leidyi Lumbriculidae Enchytraeidae Unidentifiable oligochaete Hirudinea Placobdella montifera E5 obdelaI stte Placobdella rugosa Arthropoda Crustacea Amphipoda Hyalella azteca Gammarus sp.Isopoda Asellus sp.Aselii intermedius Decapoda Astacidae Insecta Ephemeroptera Heptagenia sp.Stenonema sp.Stenonema ares F. E-Rpuflrca-lum S. h~eiteoarsale x x S x x x x x x x x x x K X X x x x x x x x x x x X x x x x x x x x x x x X X X x K K x x x x X x X. X x X X x X X X X x x K x K x Note: X -taxa found during specified time.2.2-69 RS-14-051 Enclosure, RAI AQ-if Response Page 51 of 178 Byron ER-OLS TABLE 2.2-17 (Contid)DATE OF SAMPLING TAXA 9/73 10/73 11/73 12/73 1/74 2/74 3/74 4/74 5/74 6/74 7/74 9/7i4 Ephemeroptera (Cont'd)S. gildersleevei xc-arol1ina S. frontal eK I6tamant-us sp. K X x x x K K K I Casnisop.

x e x x x x x x j!M~ia up x a limbata X K K K K sp. x x x a--etisca sp. x K La to-hiebia sp. X Tricorythodes sp. X K K K Trichoptera Oecetis up. K x emataopsyche op. x x x x X Hydropsyche sp. x X X X X Triaenodes sp. X x X X x x X Neureclipsis sp. X X x X Diptera Chironomidae Calopsectra sp.Palypedilum up.Crvptochironomue ap.Dicrotendiges sp.Paracladopelma sp.Micropsectra up.Tanytarsus up.C~dtntarsua up.Br la sp.ficladius sp.Larsia sp.Cl-inatanu!f

• Paralauterborniel1a sp.Einfeldia sp.Procl-adus sp.GlyVtotendipes sp.Abiabesmyia sp.2K: sp.Tanf mus up.Endochironomus up.REo9taeytarsus up.Paraiironomus sp.Psectrocladius sp.Eukiefferiella op.Triosocladius sp.Phaenopsectra sp.Orthocladius sp.Cliotopu sp.avrelimia sp.Conchapelopia sp.Labrundinia sp.Coelotanypus sp.Cygtotendipes sp.Macrope opiini Pentaneurini pupa Ceratopoganidae Empididae Tipulidae Limnophila sp.Simuliidae Prosimulium sp.Coleoptera Elmidae Dubiraphia sp.Macronychus sp.4iirocyIloepus sp.Stiernue s up.OptiOsevS sp.x X x x x X X X x x X X X X X X x X x x x x x x x x x x x K K K X X X X K K K K K K K K K K K K K K K K K K K K K K K K K K K K K X X X x K X K K K K X X K K K x K x K x x x K K K K K K K K x K K K K K K K K K x K K K K K K K K x K K K K K K K K K K x K K K X x x X K K K K K K K x K K K X X X X X x K X X K Note: X -taxa found during specified time.2.2-70 RS-14-051 Enclosure, RAI AQ-lf Response Page 52 of 178 Byron ER-OLS TABLE 2.2-17 (Cont'd)DATE OF SAMPLING TAA !M7 10/73T 1173 12/73 1/74 2/74 3/74 4/74 5/74 /47/497 Hydrophilidae Helophorus X Byrrhidae X Gyrinidae Dineutes sp.Plecoptera Taeniopteryx maura ts~rl iine-ata 1.Tdiciai7 Pteronarcys dorsata Odonata Dromcgomphus sp.Styluussp.

A a asp.Ara sp.re sp.Agopus up.Lepidoptera Hemiptera Hebrus sp.Arachnida Acari Arachnida (terrestrial)

Mollusca Gastropoda

ýr! sp.!:n..gyrina ell HIThiica Lynnaea up.Lynaea catascopium Pleurocera acuta Pelecypoda Ligumia sp.x X x x I x x I I x I I x X* x I I x x x I I x I x I I I I x I I x x x I x X X x I I x I x X x I I x x X TOTAL 36 48 35 21 17 26 43 51 41 34 41 44 Note: X = taxa found during specified time.2.2-71 RS-14-051 Enclosure, RAI AQ-lf Response Page 53 of 178 Byron ER-OLS 4~t.40 km N en r--4 m~ -4 M' t*n-4-4 4W H W W EN En 0.04 40 94 E.- 4 N4 E.> 0.2 Al H- CA 0 ix x U00 0 z 0 2 -0 E-" 44 E- E-.[C C 44 E-4 Cd 20 Lno CO Inl LM N r- ("4-4 -kn ~ -fn-4C fn4 C4 M' iLn C m ("40 0 In Un 0 I..0 0 44.t- V %D 4-4 CO 43 4)U'U 0 43 43 43 0 4 0 4 1 ~0 4 0. 4 1' A 3 0 .4)4 0 N4 04 2.2-72 RS-14-051 Enclosure, RAI AQ-lf Response Page 54 of 178 Byron ER-OLS TABLE 2.2-19 MACROINVERTEBRATE NUMERICAL DISTRIBUTION BY GROUP FOR SAMPLES COLLECTED AT ROCK RIVER TRANSECT STATIONS R-2, R-3, AND R-4 STATION R-2 R-3 R-4 TAXA E N E W E W TOTAL SEPTEMBER 26, 1973 Oligochaeta 6 17 7 4 9 7 50 Ephemeroptera 16 20 23 14 9 19 .101 Trichoptera 3 3 6 0 0 0 12 Odonata 12 7 21 5 7 12 64 Diptera 118 135 83 318 87 100 841 Coleoptera 1 2 1 2 1 0 7 Other 8 6 4 2 5 2 27 SUBTOTAL 164 190 145 345 i18 140 GRAND TOTAL 354 490 258 1102 OCTOBER 25, 1973 Olxgochaeta 108 71 26 39 54 49 347 Ephemeroptera 8 31 36 35 23 49 182 Trichoptera 0 2 1 1 3 8 15 OdOnata 3 25 15 14 13 33 103 Diptera 3 16 13 9 20 23 84 Coleoptera 1 8 9 1 8 3 30 Other 12 15 8 3 15 1 54 SUBTOTAL 135 168 108 102 136 166 GRAND TOTAL 303 210 302 815 NOVEMBER 28, 1973 Oligochaeta 54 26 4 23 7 4 118 Ephemeroptera 9 16 13 3 14 61 116 Trichoptera 0 0 0 0 0 1 1 Odonata 2 6 2 8 1 17 36 Diptera 1 2 3 2 7 3 18 Coleoptera 1 2 0 1 0 0 4 Other 8 12 3 3 15 6 47 SUBTOTAL 75 64 25 40 44 92 GRAND TOTAL 139 65 136 340 DECEMBER 27, 1973 01.gochaeta 36 31 5 0 16 0 88 Ephemeroptera 1 0 2 2 0 3 8 Trichoptera 0 0 0 0 0 0 0 Odonata 0 0 0 0 0 0 0 Diptera 3 3 1 0 2 0 9 Coleoptera 1 0 0 0 0 0 1 Other 1 1 0 0 0 2 4 SUBTOTAL 42 35 8 2 18 5 GRAND TOTAL 77 10 -23 110 JANUARY 28, 1974 Oligochaeta 53 1 0 0 6 0 60 Ephemeroptera 3 3 0 3 0 0 9 Trichoptera 1 0 0 0 0 0 1 Odonata 1 0 0 0 0 0 1 Diptera 1 1 1 0 0 0 3 Coleoptera, 0 0 0 1 0 0 1 Other 2 1 0 0 0 0 3 SUBTOTAL 61 6 1 4 6 0 GRAND TOTAL 67 5 6 78 FEBRUARY 28, 1974 Oligochaeta 15 1 4 6 2 11 39 Ephemeroptera 21 4 4 0 8 4 41 Trichoptera 3 0 0 0 3 0 6 Odonata 1 6 0 0 3 2 12 Diptera 4 2 7 0 2 0 15 Coleoptera 0 0 0 0 2 2 4 Other 4 27 0 7 8 13 59 SUBTOTAL 48 40 15 13 28 32 ORAND TOTAL 88 28 60 176 Note: Numbers expressed are actual counts of organisms found on east and west ends of river transocts.

2.2-73 RS-14-051 Enclosure, RAI AQ-lf Response Page 55 of 178 Byron ER-OLS TABLE 2.2-19 (Cont'd)R-2 E F STATION R-3 E N R-4 E W TAXA MARCH 29, 1974 01igochaeta Ephemeroptera Trichoptera Odonata Diptera Coleoptera Plecoptera Other SUBTOTAL GRAND TOTAL APRIL 24, 1974 Oligochaeta Ephemeroptera Trichoptera Odonata Diptera Coleoptera Other SUBTOTAL GRAND TOTAL MAY 31, 1974 Oligochaeta Ephemeroptera Trichoptera Odonata Diptera Coleoptera Other SUBTOTAL GRAND TOTAL JUNE 27, 1 9 7 4 a Oligochaeta Ephemeroptera Trichoptera Odonata Diptera Coleoptera Other SUBTOTAL GRAND TOTAL JULY 31, 1974 Oligochaeta Ephemeroptera Trichoptera odonata Diptera Coleoptera Other SUBTOTAL GRAND TOTAL SEPTEMBER 3, 1974 Oligochaeta Ephemeroptera Trichoptera Odonata Diptera Coleoptera Other SUBTOTAL GRAND TOTAL 14 11 2 1 14 0 2 6 50 342 46 7 7 61 1 7 471 27 61 6 12 12 1 13 132 36 6 0 9 8 a 8 67 53 137 3 2 187 2 1 385 0 417 20 10 245 1 2 695 1*137 628 211 15 11 3 12 12 1 4 29 87 70 23 3 14 38 3 6 157 13 26 5 11 11 0 13 79 12 31 26 1 77 3 9 3 162 15 45 7 4 75 5 7 158 7 46 20 8 11 0 4 96 155 8 0 2 12 0 1 178 15 154 13 5 65 3 1 256 13 61 0 9 206 0 1 290 235 209 278 371 616 22 10 0 3 19 0 0 19 73 19 15 0 2 8 0 7 51 58 57 2 3 4 1 57 182 192 0 0 0 0 0 1 193 12 274 1 2 65 4 2 360 98 21 0 7 47 10 10 193 45 38 4 3 0 0 48 138 77 0 0 0 0 0 1 78 2 122 1 3 212 1 2 343 15 222 0 18 196 7 1 18 6 0 12 14 2 0 6 58 11 33'20: 172 611 17 4 0 3 14 1 0 17 56 4 8 55 7 4 60 1 10 145 8 3 32 13 2 9 1 9 69 15 15 1 28 11 3 21 94 20 109 1 11 122 1 4 268 0 303.1 155 1582 7 2 TOTAL 98 73 31 32 150 7 15 80 486 552 205 24 38 289 20 47 1175 153 260 50 39 47 3 144 696 475 29 1 39 31 3 33 610 106 1059 19 30 729 19 12 1973 34 2161 22 244 2652 39 9 5161 67 746 778 4 263 0 7 78 7 2 361 0 793 1 34 233 22 0 1083 6 365 0 18 190 2 3 584 459 2050 2509 874 a Samples lost at R-212, R-2WI, R-2W2.2.2-74 RS-14-051 Enclosure, RAI AQ-lf Response Page 56 of V87 Byron ER-OLS U..0 E--0-iz'C.c,nI'Col 2~04 E4'C In-4 1 LA I II I I1 CI-4 en0I4-4I I I 1.-4 I , M I I I I I I %D ID I Ln j CN-4 Il- I II 181 -4 ul 0'-4 .4 i -4 i 4(3 ON 0 m 0 qv 0C,00-40C-4 A c; 0-4 c4 4~ cO an W M .-4 -4 MN N NqC41I .I Ifni w L r-4-4 CN I I I N MO00I I N".4 1fA4M,-4 W -4 CNIW r4 I I II*-4(3 I N 1 1 1 U) I I I I I I 1 I I INI I II I IN I1I1-4 .4 00%.-4-40-4-4 OD 1 14 It-I 0 10:-m -4 I %D I I if) N 00 C. N;U1 0:3 4).4@(A CI .4J 0 0~ 3 .(a ra : fn 040 rd -4 g rI. '1 40 W :3~ wu 9) U : U) 1 3 0 4) Q) :3 0 :S $ r4 4.0 H C 4@3.- 400 4. 10 (0 0 C 14 111 4) -10g 4J 1 4 -W 04 i CH(0 E -A U..-4 Ur 09::; 0- 4 .).a.. 0 0 (A0"' ~ 0 3$4~ 'OUC@ 0 -W 10 44 0r-r $4)U *.4~ r- 3 0 .04 0 0 41 0 1" U4 3 0 0 3- .4-U) 20 -04lJ kW 4) 0034z 00, Om 000 0 go0 000 4. 0 0 0 0 (3 0 0 3 In300 0 0 4 Si o 1411 j -4 :3 : 1-4 >1-1 ~~ ~ ~ ~0 '14$ J(ý4 -4 4JV. $34 0' U30 44.a-E@a)a w 0d a) 0 .IV> 0 d-4 )4,I 0(10. Ca U 0.-1-1Z0-,1 a.C 1C i m 4 4jmH 344)2.Ad 04@-04 14 0 0 Ad .-4..4 cc o C~ C-~ 4 4 4id-_4 rI 0 g0 m44TO-. 4 -H4 Z-4 D 0c r J 9-4 0.0.0 0-4 344 10 0 In to z 0 Li 2.2-75 RS-14-051 Enclosure, RAI AQ-lf Response Page 57 of 178 Byron ER-OLS z'z M 0 El I0-4 C3 a m C34 m w in~fI 4.C' -O 4 M-f I I 1 1 4 Cliii 14m 1I I4 In I lI II II I I (Y.-q..M -4 %n4 %o 4 I4r 14 -4 an ('4 ien i ~um II w 1 01 I 11 4 14 1I 4 '.4 V 0 .m -4 43 '-4 C 4 4 W044 14-O1-443. 9.0 4 Ca r n 40 0 43 10 0 A 43 1 04 fdM c'~.C 01 4l344 V ar 4 J l9-Maaox 4400 (Ds 44 00130 x 4 X N 0 0 o,1$4 j 0 F -.4 C ýt 043 4 .4. A0 0 0 4JJ- 4 4 x 4 .E 0 U 0 C41 ('4I-4 0 44 0 0 to is 0 44 a I-, 43.,4 41 M0 0o 444 43 4 03.tW4J=4m0.

$4 C 04 4.) V 0. to ao 0114 00$4 4 a4 43 w -.4C S >1 >'-4 0a v aWOM A 43a4.44 $4 k -4 .*4 .a-00 a)34'0 L 9.in.4 0C E.2 2.2-76 RS-14-051 Enclosure, RAI AQ-1f Response Page 58 of 178 Byron ER-OLS in M in 0%U4 0 1;in 0ý in CO v U--D 4 -1 0 (nLM mD In M r4 N.in -4 LA I%00%4).4-4 wA.4.4 %E-44 En4 M% 0 n -~4 2 LA~~~- 4)M 1 n ) 0 0 C4 N4 N 4 -4 L C--. 01N1 ' i ~2~r- %04-4 i L4 r4 r4 rz 00% VA L n i En

• 4 n N 0 0%.wN 0 L4A 4 4J C0 0~0-0 in .4 C- C- .4 -4 43 .C'4 '0) '4 E-- HA4 M 0 C4 LN %0 -4 ý OA) to HA 04 M 4 N 0-W4 M4 N4 0.Cs.P P. 40 M 0 C- 0 0 .V U; 4)LA .0 0 C % M4 00 --- -~ 4 -A En L4 ) 4)4- -4 % 0 N L 0 -1 4 C4 to-4 04 N 4 Qn 4 M -N I 0%- -~4) 44 o ~ ~ ~ 3 .. I L L 4 C 0.4 4) 0 2M 1. GO r444w 0 z~U U) U)(aC 0 0 -0 4) N4 4.4) to 0 to f 4) t .0 in to 0. N 0. ..4 4). ." 4 t r --.4- -1. -4). E.I% 0 0. A-0 0-0'U a A.C 2.2-77 RS-14-051 Enclosure, RAI AQ-lf Response Page 59 of 178 Byron ER-OLS TABLE 2.2-22 CATCH PER UNIT EFFORT DATA FOR FISH COLLECTED FROM ROCK RIVER--,slrf Il~ft rn- -fU~l 14 ...~U~~f ". ~ mw~ 1, STATION COMMON NAME R-2 (FAST)Shorthead Redhorse Channel Catfish Black Crappie Total Net-Hours of Effort R-2 (WEST)Carp Shorthead Redhorse Channel Catfish Bluegill White Crappie Black Crappie Total Net-Hours of Effort R-3 (EAST)Carp River Carpsucker Shorthead Redhorse Channel Catfish Yellow Bass white Crappie Black Crappie Total Net-Hours of Effort R-3 (WEST)Carp River Carpeucker White Sucker Shorthead Redhorse Channel Catfish White Bass White Crappie Black Crappie Total Net-Hours of Effort R-4 (EAST)River Carpsucker Black Bullhead Channel Catfish White Crappie Black Crappie Total Net-Hours of Effort R-4 (WEST)River Carpsucker White Sucker Channel Catfish White Crappie Black Crappie Total Net-Hours of Effort CATCH PER UNIT EFFORTa JAN 1974 APR 1974 JUL 1974 OCT-NOV 1974 SCIENTIFIC NAME Moxostoma macrolepidotumus Pomox in nigqr~ornadjiltus Cyprinue carpio Moxostoma macrolepidotum ct-alurus ,nctatus Lomsmacrocnirus Pomox21 annularis Pomoxis nir--omaculatus 0.50 (1) 0.25 (1) 9.5 (38)0.50 (l) 4.75 (19) 9.5 (38)0.5 (2)1.00 (2) 5.00 (20) 10.0 (40)48 96 96 0.25 0.25 96 (1)(1)C rinus carpio Carpiodes carpio Moxostoma macrolepidotum Yc-taiurus t Morons mississippi enais Pom--is annularis C rinus car io Ca carpo Catostomus commersoni Moxostoma msacrolepidotum Ictalurus punctatus Morons chrpps Pom~ins -Tromaculatus pods car io Pomoxis annularis Pois atus Carpiodes a Catostomus commersoni Ictalurus punctatus Pomoxis annu--ar a Pomoxis nFgromaculatus 0.25 (1)0.25 (1)0.50 (2)1.00 (4)96 0.00 (0)48 0.25 (1)0.25 (1)96 0.00 (0)48 0.25 (1)0.25 (1)96 0.25 (1)0.25 (1)96 3.00 (12)3.00 (12)96 0.25 (1)0.25 (1)0.25 (1)3.25 (13)4.00 (16)96 1.00 (4)1.00 (4)96 1.50 (6)1.50 (6)96 0.25 3.50 0.25 1.25 1.25 6.50.96 0.25 0.25 0.25 1.50 0.75 3.00 96 0.25 0.50 0.25 2.75 1.25 1.25 6.25 96 0.75 0.25 2.50 1.50 0.75 5.75 96 0.75 4.00 0.25 1.00 6.00 96 (1)(14)(5)(5)(5)(26)(1)(1)(2)(2)(3)(12)(1)(2)(1)(11)(5)(5)(25)(3)(1)(10)(6)(3)(23)(3)(16)(1)(4)(24)0.25 (1)0.25 (1)0.50 (2)96 1.00 (4)0.25 (1)0.25 (1)1.00 (4)2.50 (10)96 0.25 (1)0.50 (2)1.25 (5)0.25 (1)0.75 (5)3.00 (12)96 0.00 (0)96 0.25 0.75 0.50 1.50 96 (1)(3)(2)(6)a Numbers in parentheses are actual numb correspond to fish per net per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.mrs of fish. Numbers outside parentheses 2.2-78 RS-14-051 Enclosure, RAI AQ-lf Response Page 60 of 178 Byron ER-OLS a C4 ~~~%QW1 00 0 NN M C 00 0W 01 00-V 0! 9 Iý "I..z w moo C' ON0C 4 0 04 E- r- fnf N0%-Ci o n 0 4 r- o4 o0 .4 C 00 o 0 0 0! C! CU 1= !m'~ o or,= *ý a o m' an o* C4400 Nn N 0 ('z M0.W %n wn 00 zn ci4 0 m ND 00% N o~~C W = 4W O 0 0==0 00% 0 04 0 IN 0r

• 1 *qr.W7 01. C0 >~- OIN OWO0Lýz 0I. 0m0 V0A Zt=- C4 01 C "eO 14 0I mO" N1 to 0 00 0 r.-440 N 00.C% 0 14 A 0I 00 4-2.2-79 RS-14-051 Enclosure, RAI AQ-lf Response Page 61 of 178 Byron ER-OLS'Ow-W M 10 0 0 C.'C..'N a:0 rN4 r00 N CD -4 1-4 0 -C-4 rn .-COd.-0 o -o aI4 .0 0 0 0 0 0 0 o0 v 0 ! C!10-0-4 0!0C!02 M 0 C..C C'!00C 04 .II- *UC w0 M 0 0 C%..'t0c-4 .-4 o1 in 0 ' C 01 l.4'0Io-4 A.0% IN.40 0 I..0 %fl.-IOM 0-4 03 In-II 0 U E..In H I 0% UIC $4 0 Ir %9 1 l 1 0 11 j C 0% 10 .40%0.4d 1-$a M'4 Xo40 0 L)~ U4~ aO M -~.I~A%(0 O~ ~ ~ 0~-4 41O~ SA 9 ga 2.2-80 RS-14-051 Enclosure, RAI AQ-lf Response Page 62 of 178 Byron ER-OLS'01ý4 r4 0 4 0 0 ICaS I In C4-4 -4 0 4 r4 0-#(n C" 0! P-!40-in in N Ni r-4-4-0 0 0 .4 -4 0 H.4.0 N N N4 0 0 N N4 0N-4 ,N an 0 C4 C4O0-4 4 a -4 0 0 0 ci 0!0.1 r- N --4.-4 tna 010 00 C 000 r-1 1w-W0.'a 'a 0% 0%0 000.4.0 N NO 'a 0 0 0b zi CAW 044 a)4 4J 4)8q n 9: tr a

• 8 01C 0t* C 0.1 1.4.-a 41 P3 E n ON-4 41"I. Id. anC oawl.4Jia4 41 4 O41.1 an CL.1 9:0 i C 0% rt 3C-4 -341waC+aa an -410 H 4I.41.1 I.-al OIOI as,'1 1 2.2-81 RS-14-051 Enclosure, RAI AQ-lf Response Page 63 of 178 Byron ER-OLS i C,'V v-41 T 03 ini 0 U*D 0U -r- 1-0001-4 0 0 U E.4 IA 0.0 IA a% -4 0 (.3 3.0 00 -0 00C41 0 5 0 U, 0~ ~~~ 0.(0- a.0 0 00 ý4 0 0)0- 40ý -rf0 ý0 'q 0 Z.Hi (.1 0%-4 8 000 N ow *z 4) 4.' Nu)0.0 An a% 0-4 C 4.)0 0 d 41 :I 0 m8 0'A-0%-I 4..4.)8 0 0 00 2 w 410)z4.4J 1g NW to 0%4) 4 0%go --U 04.O4.IUW En0 W4 01-4I 44j-A 440U 0-4L 401) 01 4J) 00 0 00 enI'.M:)H3 14 0-0 A..0 z. 4 f"0 14 W0 A..2.2-82 RS-14-051 Enclosure, RAI AQ-lf Response Page 64 of 178 Byron ER-OLS E)U z.N, II 40 en 0 14 14 0.L0 a in in 001014 0 0 0 r- r-10 00,0-4 0 64 0 0 0 0-4.4. 4*O NN in i 0 000.0 0 0 ini 0r Uý.0 do q0 U Otr 'co 9zcm Mfl MJUV 441 a~gI FA Xm 4.6.-4 o'a c.. m w *>.i. ew-4 4~U)-4 I X~ .14-4 0-0 zi.~ 'II m mm-4~d 4)04-4-4 2.2-83 RS-14-051 Enclosure, RAI AQ-lf Response Page 65 of 178 Byron ER-OLS TABLE 2.2-24 LENGTH-FREQUENCY DISTRIBUTION ARRANGED BY AGE GROUPS FOR TEN SPECIES OF GAME FISH COLLECTED FROM THE ROCK RIVER.JANUARY THROUGH NOVE=MBER 1974 JANUARY THROUGH NOVEMBER 1974 GAME FISH DATE Northern Pike (Esox lucius)Jan 74 LENGTH RANGES 30.0-34.5 Total Number Average Length 35.0-39.9 40.0-44.9 45.0-49.9 Total Number Average Length NUMBER OF FISH 1 1 AGE GROUP I II II 13.1-30.1-IV Oct 74 I 1-1-1-2-44.0 Channel Catfish (Ictalurus punctatus)

Jan 74 Mar 74 Apr 74 17.0-17.9 18.0-18.9 19.0-19.9 20.0-20.9 21.0-21.9 22.0-22.9 23.0-23.9 Total Number Average Length 5.0-5.9 6.0-6.9 7.0-7.9 8.0-8.9 9.0-16.9 17.0-17.9 Total Number Average Length 19.0-19.9 20.0-20.9 21.0-21.9 22.0-22.9 23.0-23.9 24.0-24.9 25.0-25.9 26.0-26.9 27.0-27.9 28.0-28.9 29.0-29.9 30.0-30.9 31.0-31.9 32.0-32.9 33.0-33.9 34.0-34.9 35.0-35.9 36.0-36.9 37.0-37.9 Total Number Average Length I 1.1 1 1 2 1 0 1 5 1 2 2 2.3 3 4 8 4 3 2 1 2 3 4 I I 43-2 1.-1 4 1 7.3 17.8 1 2 " -1 1 -1 2 -2 1 -1 3-- 8 --- 4 --1 2-1 1--- 1--- 2--- 3--- L--- 1 1 10 21 12 22.6 26.9 32.8 1-1-1--1 3 1 18.5 23.4 2.2-84 RS-14-051 Enclosure, RAI AQ-lf Response Page 66 of 178 Byron ER-OLS TABLE 2.2-24 (Cont'd)GAME FISH DATE Channel Catfish (Cont'd)Jul 74 LE.NGTH RANGES_ (cm)NUMBER OF FISH AGE GROUP I _. III IV V 18.0-18.9 19. 0-19.9 20.0-20.9 21.0-21.9 22.0-22.9 23.0-23.9 24.0-24.9 25.0-25.9 26.0-26.9 27.0-27.9 28.0-28.9 29.0-29.9 30. 0-30.9 31.0-31.9 32.0-32.9 33.0-33.9 34.0-34.9 35.0-35.9 36.0-36.9 37.0-37.9 38.0-38.9 1 3 7 10 11 9 2 3 5 9 8 6 5 2 5 1 3 2 2 3 97 0 1 1 I I 0 1 1 2 5 6 4 4 3 25 22.0 I 10 20.3 I 2 4 7 4 2 2 2 9 5 4 2 I 3 2 2.1 5 1 3 2 I 1 I 1 3 6 35.7 I Total Number Average Length Oct/Nov 74 20.0-20.9 21.0-21.9 22.0-22.9 23.0-23.9 24. 0-24.9 25.0-25.9 26.0-26.9 27. 0-27.9 28.0-2e.9 29.0-29.9 30.0-35.9 36.0-36.9 Total Number Average Length White Bass (Morone chrysops)44 22 25.3 31.2 1 I 1 1 2 2 1 23.9 27.6 36.0 Oct 74 20.0-24.9 2 2 Total Number Average Length Yellow Base (Morone m--l'saippiensis)

Oct/Nov 74 15.0-19.9 20.0-24.9 Total Number Average Length Green Sunfish (Lepomis cyanellus)

Apr 74 8.0-8.5 Total Number Average Length Bluoegill (Lapomis macrochirus)

Jul 74 10.0-14.9 Total Number Average Length 2 20.0 2 18.5 2 1 1 8.3 1 1 1 1 13.5 2.2-85 RS-14-051 Enclosure, RAI AQ-lf Response Page 67 of 178 Byron ER-OLS TABLE 2.2-24 (Cont'd)GAME FISH LENGTH RANGES NUMBER -AGE GROUP DATE (cm) OF FISH 1. 1 I_ XV *V Smallmouth Bass (M4croeterus dolomieui)

Jul 74 25.9-29.9 1 1 Total Number 1 1 Average Length 27.1 Largemouth Bass (MicZo+terus amoides Aug 74 30.0-34.5 1 1 Total Number 1 1 Average Length 30.9 White Crappie (Pomoxis Jan 74 15.0-15.9 1 1 --16.0-16.9

---

17.0-17.9

---

18.0-18.9

---

19.0-19.9

---

20.0-20.9

---

21.0-21.9 1 Total Number 2 1 1 -Average Length 15.1 21.0 -Mar/Apr 74 11.0-11.9 1 1 -- -12.0-12.9

---13.0-13.9 1 1 ---14.0-14.9 1 1 ---15.0-15.9

---16.0-16.9

-.. ..17.0-17.9 1 -18.0-18.9 1 -19.0-19.9

-.. ..20.0-20.9

..-.21.0-21.9 1- 1 --Total Number 6 3 3 -Average Length 12.9 18.8 -Jul/Aug 74 14.0-14.9 2 2 ---15.0-15.9 4 3 1 --16.0-16.9 3 3 ---17.0-17.9

---

18.0-18.9 2 -19.0-19.9 1 -20.0-20.9 3 -21.0-21.9 2 -22.0-22.9

---23.0-23.9 2 --1 1 24.0-24.9 3 -2 1 -25.0-25.9

.-....26.0-26.9 1 --1 -Total Number 23 8 11 3 1 Average Length 15.7 20.5 24.7 23.0 Oct/Nov 74 17.0-17.9 1 1 ---Total Number 1 1 -Average Length 17.1 -2.2-86 RS-14-051 Enclosure, RAI AQ-lf Response Page 68 of 178 Byron ER-OLS TABLE 2.2-24 (Cont'd)GAME FISH DATE Black Crappie (Pomoxis nigromaculatus)

Mar/Apr 74 LENGTH RANGES (cm)10.0-10.9 11.0-11.9 12.0-12.9 13.0-13.9 14.0-14.9 15.0-15.9 16.0-16.9 17.0-17.9 Total Number Average Length NUMBER OF FISH 1 2 2 AGE GROUP I. II III IV V 1 2 1 1 5 4 1 12.8 17.0 Jul/Aug 74 11.0-11.9 12.0-12.9 13.0-13.9 14.0-14.9 15.0-15.9 16.0-16.9 17.0-17.9 18.0-18.9 19.0-19.9 20.0-20.9 21.0-21.9 22.0-22.9 23.0-23.9 Total Number Average Length 1 1 1 11 3 1 2 2 1 1 24 1 1 2 3 2 1 10 1 1 1 9 1 1 2 2 2 2 1 16 8 14.6 17.4 Oct/Nov 74 11.0-11.9 12.0-12.9 13.0-13.9 14.0-14.9 15.0-15.9 16.0-16.9 17.0-17.9 18.0-18.9 19.0-19.9 1 1 2 3 2 1 Total Number Average Length 9 1 14.7 19.6 2.2-87 RS-14-051 Enclosure, RAI AQ-1 f Response Page 69 of 178 Byron ER-OLS.4 14 z %0 00 0 C t, %D %D4 %ac in %0 in E* % 0% at 0 0% Ch 0% 0%(14 -4 1 4 .4 .4 0% r-4;4 %a 4 4.) 0' 4 --0 ..4H tr 04 01 00g 4~ .~ V-4 -4 .40% -1. W4 .& .4 0 14 04In .4W %D r4 of 0. 09 4 0 010% to 00% i 0 0 r. N (a P4.4 U U .4 .1 U M4 A. wa .v4 0 i I% U; r %0 0Gn o Oli 1 m en C4 -t 4 ..4 .m m20 > ' 0% IA r: 4 E40HI 0D 0% 0 .4 0D I in en in wn -0 i 04 0 04 44H 1 v In 04 I n N 4 N .4 4 0'w N N4 N4 m N .4 .-4 00 inA 03 In 0i .a~0 % a% .4 I.- (a Eý I N -N 1- M4 .4.4 m% 14 N (A C" j 44Hj N 0 0 0 In Wn N qw*~ N r-4 ( ( 4 ( N 0h N (fl -0 W C% N4 wn 0) .M rI -r. w Z H at .4 NI 0 en GoM U A C" 0. 4 0-~*4H CH 0A4 0 A 4) 0 A~0 to -4 0 0 .01 w O 0A ) -A 0 0 0ý U2 O (L) 144' .. I. r-4 0 (42 *.4 0 0 o -4H 9 (42 -o -04 0)to .4 4 40 *.0) 1 020~ ~ 9: 01 0.. r4 VV

• mV V$4 ,ý4 $4 4 MO 4 w 4. 4 Cn 04 4(S> 41 A in~e > IA n n I 0 o VI I 0 H -I qv In n %D %D 0 E.0 00 0% % 0% Ch 4 4 0 0% 4 U ~-1 0 4 `24 .4 I-0 10 041 0 .r..FA 4V 1 )0 4L .4) qw .4 m L .-41 0 Hm 02 ( h 9 0 % r44 r. ~ 0 % C41 0:Ct rdC 04 -1 C M o. -q4 C) -M .4 -.4M E-01 0) 4 a0 0 C 14 .. 4 40z.40! ~4.) 014 U14 o 2 U (.4 CW 2.2-88 RS-14-051 Enclosure, RAI AQ-1f Response Page 70 of 178 Byron ER-OLS* 0 m -z .140£0m'4* "4 14 Go in 41 41 0.-4 0 r-4-'4 r4%a 10%0 %a:S 0-4 0!0% In V CO-4 1-4 U' n -4P -4 M% in Le)a% .-4 0% 4m 0%0 ,-4 ,'4 i O 0 .0,.-! 0 0 0 .=m IA N 4Ln C1 -a m-1 N -4. 4 -4 c4 r'I) N N.4 N .- % I 0~1 0! N U, 0%-41 44-4 -4 0%ta %D Cm C%..I -4 Ch 0% 0' 0 I- r- N4 NM N1 N u, 4I c0 N N4 N Nq N -4 o 9 1'-4 w In Ch r-4 41 C4 ri%0'C1 =' C' -4 0 en 0 qw LA r. 1.4 U) ~ ~ ~~ ItI -C n 4 -n C D M' 10 43 r-41 r~n ' '44 4 0 0 14 D w4 0 0 14 k4 LA V 0) V 4) 0 0 0 N to 00 0 to to to w1 0 C: C ) 0 01.4 01.4 14 r. 00 r 0 : A 0 0 0 0 4)0 .-H 0 0.41 0-ý4 4 004 00W- M 0 H U4 A4) U0 U m W.1 ) 0 N 0H A.4 H O U.W 4 0) U N £4 'a 00 r 0 0 10 fi. 0 14U .34 0r %o 2~ t 449 W.~0.w U 4 0 44.-I 0 a r. .83 U) -'-4 ': -A4 0 0 0 r. (n 08 0 to-H r4 *4 -08 0 a)"4:-0 W0 0 1.4 r. 0 0-jC4 w5 -14 14, $4 .44 C 4- 00 000-HM 54-4~ -0 14). 00 *-`4:w0 414 $4-W $4 .-I- ` 141 -0 80 -40 141-4~ M r 0 -4 0 2; 0 -A4 410 9 V 0 -r r40.40 r 0( 0-H H C H I4 > ~ .4 0 ) U0 En 4 H > H~ ,.3 .: 0 044£0 E U L)U 00% Ch a m CA0 0% n r-1 r4-4 4-4 r-14 4 0 0 ' I 0 0 C" I I. 0 Ný r. 90 N n q r. N N .-I LA .59 hi~ Ln r.4 n A4~ > 4 Ad In In r-41An 0% 0 8 0% 00% Ch 9 0 a, 0% ON 00%t 9-4 W..-4 0 z I4 C r-4 -4 Pw r-00 to 8a ta 10 I 0 w 544 4-)41 14 J to. '.82 .01 00U r4 14 t1 -4441 00 En4 0 43ý41 01 1, 00 14 -0.2.2-89 RS-14-051 Enclosure, RAI AQ-lf Response Page 71 of 178 Byron ER-OLS TABLE 2.2-26 RESULTS OF PERSONAL INTERVIEWS WITH FISHERMEN ON ROCK RIVER FROM MAY 5 TO SEPTEMBER 28, 1974 PARAMETER Number of Fishermen Interviewed Hours Fished Total Number of Rods Used Average Number of Rods Used Number of Fish Caught Total Number of Rod-Hours Number Fish/Rod-Hour SPECIES PREFERENCE Catfish Carp Bass Bullhead Crappie and Bluegill Walleye and Northern Pike Buffalo No Preference STATISTICAL VALUE 965 2585 1381 1.43 812 3980 0.204 PERCENT PREFERRED 60.0%3.8%4.5%1.3%1.3%5.5%0.3%23.5%2.2-90 RS-14-051 Enclosure, RAI AQ-lf Response Page 72 of 178 Byron ER-OLS P414 HO0 r44 E-4 WI4 lz 0 A 0 0 w~P4E 0 H r4 1w Ln r-1 Ln r-Ln ON~ Ln m C%4 C14 C14 C%4 H- H1 co on 0~ 0 0%r H '. r LA LA C1 m m r- Go % 0 C%4w LA 04D 4 H- in Cq m C4J H-. Ch -H- 49 H-04 0 0 H CD 0O 0N 0)H;C1'4 H-(L >i 0 4J z >1 0 H- 01 0 0 0 0 0 )x I- z U2 t3 E-4 0 E-4 2.2-91 RS-14-051 Enclosure, RAI AQ-lf Response Page 73 of 178 HO 0 D4 C4 Byron ER-OLS C4 0% Ln I" W LA C %0o %D co Ln qw H 0% .Ho r4 C4 qw C4 1w H4 H U1 0 Ln 0k C% N~ 4 H- Hq m N H- C4 C" 4 oý o ; '0 0 : 0ý 0; 0; 0a 0 0 0 0 C,.4 C1 E-1 H z r14 0 z 02 rzI H En U3 En a-z~OCQ z N14 C4'Ix-0 E02 in a H 0 rn E-4 W: z N 002 1.9-1 .D HD 0 000 N 4W' SD 1 0-H N ('1 H- 0 v N H- 4v 4' -F-4 H H4 N H- 10c 4' %0 4m N HA IV w %0 tr- (n 4' H 0 o.H 4 H 0 4 H. C. H: N0 N 0 1-H N H- 0 H 1 En 8 H 94z UL U N 9 A 10 H 4 ' 1) 4 H ID 4' 0 ON w0 w 0 Ný m'H CO N In fn) H H4 0 F:4 E-1 H Co$4 oo 4) 1 0 0D w 00 0 .E-4 C)0 14 (d 0 4 14 0 I 0 A4 00 m~~ rd w i c'1 ' 414 iU$4 Id 0 0 01 0 0 0%0 0 0 0 $4 0 I!to 0 O Hr-N- 0 41 o 0 0 0 2.2-92 RS-14-051 Enclosure, RAI AQ-lf Response Page 74 of 178 Byron ER-OLS TABLE 2.2-29 FISH SPECIES CAUGHT BY FISHERMEN INTERVIEWED ON ROCK RIVER FROM MAY 5 TO SEPTEMBER 28, 1974 COMMON NAME Smallmouth Bass Bluegill Orange-spotted Sunfish Redear Sunfish White Crappie Black Crappie White Bass Yellow Bass Walleye Northern Pike Channel Catfish Yellow Bullhead Freshwater Drum Smallmouth Buffalo White Sucker Redhorse Hog Sucker Carp Mooneye American Eel SCIENTIFIC NAME Micropterus dolomieui Lepomis macrochirus Lepomis humilis Lepomis microlophus Pomoxis annularis Pomoxis nigromaculatus Morone chrysops Morone mississippiensis Stizostedion vitreum Esox lucius Ictalurus punctatus Ictalurus natalis Aplodinotus grunniens Ictiobus bubalus Catostomus commersoni Moxostoma sp.Hypentelium nigricans Cyprinus carpio Hiodon tergisus Anguilla rostrata 2.2-93 RS-14-051 Enclosure, RAI AQ-lf Response Page 75 of 178 Byron ER-OLS TABLE 2.2-30 NUMBERS AND PERCENT OF TOTAL CATCH OF FISH TAKEN FROM ROCK RIVER BY FISHERMEN INTERVIEWED FROM MAY 5 TO SEPTEMBER 28, 1974 COMMON NAME Channel Catfish Carp Suckers Yellow Bullhead Bluegill Drum White Bass Smallmouth Buffalo Crappie Walleye Smallmouth Bass Redear Sunfish Orange-Spotted Sunfish Yellow Bass Northern Pike Mooneye American Eel TOTAL TOTAL CAUGHT PERCENT OF TOTAL CATCH 291 35.8 262 32.3 80 9.9 73 9.0 59 7.3 10 1.2 10 1.2 8 1.0 7 0.9 5 0.6 1 0.1 1 0.1 1 0.1 1 0.1 1 0.1 1 0.1 1 0.1 812 99.9 2.2-94 RS-14-051 Enclosure, RAI AQ-1f Response Page 76 of 178 Byron ER-OLS W.0%E-4 02 E44 A4 04 E in 0 E-4 H 02 H A4* 02 (E4 z 04 04 02 (Eu 0AH 0 H j2.01 02 02 02 02n Hj 0 0 0 0 0 0 0 0 0 0 Ln In I0 1.4 0 0 0 0 o 0 a 0* 0

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• 0 0 0 In In r N4 m a 0 0 0 *0 0 a 0, *0 01 I 4 ci *02*,,.-0 0 *-4 -,4 0 ,4.-4 02 0%C" 0 In .I --4-4 1- N ,Iq 0 to 00 r- -4 02 N N N IC%CniC M CD N F- F- 1') 02 I~F- 0 0 0% I~I .-E N En E-'z H W4 (44 4)0>1 In a) 02U34 w4 -Eu1 4: EG E .4- 4.3 Eu~~~ 03. 4 4 u ) (.e w~ED ~ E '13 41 CO 1 oW 0 $4 0 d )0 -$4 14 i': U) .1 .4 w 0 d 4 to -.3.)14 m U- U4 r4 Adu 04)~V E4 A4 0& -4 .&l 0 .0D E 0d (I. d E 0 m 0v $ 14I20in.E 14 w m 00m 4 2.2-95 RS-14-051 Enclosure, RAI AQ-lf Response Page 77 of 178 Byron ER-OLS I4a~U0 04 ,q-4-4 ,- N -4.4 0; 0 tm 0 -41 I. r --4 .4 O!iC- 4C -0 00 CD 01 C4 Nm*N N 71-4 E-1 0.E2 0n E-4 z H z~02 E-4 U z 0 EH N U z 9!r, LA S04 to)30 to 100-4 n 1 -4.- 0 In N .0 --14 A-4 N-i-4 0-I I I 0 IV 1 I I U, r-in-W -%-r n oin CO Ln 0 I-a--4-4-4-4 I I I I-4 to 0 I". 00 r-4-"4 ,-i 0 0 0 Nq I I 0 0 0 I LA;z 0;N4 0 0 0 ,-4 a-0 0 0-4 0 0 I -4 rG".4 0 N 413 a-4 0 FA 4)01 0 0 0 U.3 41$41 g4 0 z 4.1 0.I I I 0 E, 0 110 44.0. 44 r. tao. (D 0 w2 $140 W2.~~.14 U41 to -4 4).a44 w1 'mu Na M.U) (a En -1 (a 0.a t7% 4D 00 -4 4)1 A ,4 0 44 1 m -4 A4 04 .4J 4 r4 -4 1 0 r 41 4: 4 4 V 0 0 $ 4 0 4J 04 2 0 E U 0 0) a CO 02 r 0 2 IM >4 U)9z 2.2-96 RS-14-051 Enclosure, RAI AQ-lf Response Page 78 of 178 Byron ER-OLS TABLE 2.2-33 FISH EGGS AND LARVAE COLLECTED FRON ROCK RIVER STATIONS R-1 THROUGHRE-5 AND S-3, S-5, AND S-6 BY TOW NET FROM APRIL 23 THROUGH JULY 3, 1974 STATION TOTAL GALLONS FISH EGGS TOTAL NUMBER AVERAGE DATE FILTERED AND LARVAE COLLECTED NO.410,000 GAL R-1 23 APR 74 a Eggs Larvae 0 15 MAY 74 15,254 Eggs b 0 0 Cyprinidae 2 1.3 Catostomidae 1 0.7 Total Larvae 3 2.0 10 JUN 74 9,683 Eggs 0 0!;4 rinus carpio 3 3.1 Caea oconstans ic 1.0 Total-Larvae 4 4.1 3 JUL 74 13,347 Eggs 0 0 Larvae 0 0 R-2 23 APR 74 a Eggs 0 Larvae 0 15 MAY 74 17,773 Eggs 0 0 Cyprinidaea 2 1.1 Total Larvae 2 1.1 10 JUN 74 12,733 Eggs 0 0 Cyprinidaeb 2 1.6 C I carpio 3 2.4 Lvae 5 3.9 3 JUL 74 a Eggs 0 C rin carpio I vae 1 R-3 23APR 74 a Eggs 0 Larvae 0 15 MAY 74 12,999 Eggs 0 0 Catostomus cormersoni 1 0.8 Percina caod 2 1.5

-1 0.8 Total Larvae 4 3.1 10 JUN 74 Fertilized Eggs 1 Unfertilized Eggs 1 Cyprinidaec 1 Cyprinus carpio 4 Catostomidae I Le o as Sp. 1 tarVLarvae 9 3 JUL 74 a Eggs R-4 23 APR 74 a Eggs 0 Larvae 0 15 MAY 74 17,774 Eggs 0 0 Cyprinidaeb 2 1.1 Catostomus commersoni 1 0.6 Total Larvae 3 1.7 aData unavailable due to flowmeter failure.bMinnows other than carp.Cjuvenile.

2.2-97 RS-14-051 Enclosure, RAI AQ-lf Response Page 79 of 178 Byron ER-OLS TABLE 2.2-33 (Cont'd)TOTAL GALLONS FISH EGGS FILTERED AND LARVAE STATION DATE R-4 (Cont'd)10 JUN 74 3 JUL 74 R-5 23 15 a 12,468 a 8,887 6,234 APR MAY 74 74 Eggs Cyprin carpio Morons op.TM. rvae Eggs kCyprinus carpio sp.Total Larvae Eggs Larvae Eggs Cyprinidaeb Catostomidae Percina caprodes Total--Larvae.

Eggs Eggs Cyprinidae Total Larvae TOTAL NUMBER COLLECTED 0 3 1 L 0 0 5 0 5 6 0 2 0 1 1 1 3 0 1.1 0 2 2 AVERAGE NO./10,000 GAL 0 4 0.8 4.8 0 1.1 1.1 1.1 3.3 0 1.6 1.6 10 JUN 74 3 JUL 74 S-3 23 APR 74 15 4AY 74 10 JUN 74 3 JUL 74 100 Eggs Larvae 100 Eggs Larvae 100 Eggs Cyprinus carpio Catostomus Total Larvae 100 Eggs Cyprinidaeb Total Larvae 100 Eggs Larvae 100 Eggs Cyprinidaeb Total Larvae 100 Eggs Catostomidae Total Larvae 0 0 0 0 0 1 2 0 2 2 S-5 23 APR 15 MAY 74 74 10 JUN 74 3 JUL 74 NOT SAMPLED S-6 23 APR 74 100 15 NAY 74 100 10 JUN 74 100 3 JUL 74 100 a Data unavailable due to flowmeter bMinnows other than carp.cToo yound to identify.(too shallow)Eggs Larvae Eggs Catostomus commersoni Unldentifiahled Total Larvae Eggs Larvae Eggs TotP zasp.rvae failure.0 0 0 4 4 0 1 I 0 0 0 1 1 2 0 0 0 1 1 0 0 0 0 0 100 100 200 0 200 200 0 0 0 400 400 0 100 100 0 0 0 100 100 200 0 0 0 100 100 2.2-98 RS-14-051 Enclosure, RAI AQ-lf Response Page 80 of 178 Byron ER-OLS I4 .4 , VI- I S I I t~4 Cl.-4 M~ Cl C4 C.=l 14 N 14 .-II I i I m " W Hm im ru 010 015.4 Ow 0 0 0. Ci 4W4-) IV 01:j 0 V 00 0 -H. V 1 .4'a r$4 w Uo m v$ >1 C ri4 *-4*.4 .W 0 800 0 .41 0 'CC 0 4)H .ý 41 4 OW to 14 4 -2 Ha)$4 U 0 U) 0 v A UO 04W fI 2.2-99 RS-14-051 Enclosure, RAI AQ-lf Response Page 81 of 178.1 LL CREEK O.1 MAN ROCK R-2, SILVER 0 CREEK Ulmi LEGEND: CREEK I.S 0 -0.RIVER TRANSECT STREAM STATION POOL STATION'-5 SEINING LOCATION BYROM STATION DAM OREGON MILES BYRON NUCLEAR GENERATING STATION UNITS I & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE FIGURE 2.2-1 AQUATIC SAMPLING SITES NEAR THE BYRON STATION RS-14-051 Enclosure, RAI AQ-if Response Page 82 of 178 AGE GROUPS IL.0 0 z 2-IL m 1-4 U.....I 15 t----1 I I..20 2 25 TOTAL LENGTH (CM)BYRON NUCLEAR GENERATING STATION UNITS I & 2 ENVIRONMENTAL REPORT- OPERATING LICENSE STAGE FIGURE 2.2-2 LENGTH AND AGE FREQUENCY FOR 4 CHANNEL CATFISH COLLECTED FROM ROCK RIVER DURING JANUARY 1974 RS-14-051 Enclosure, RAI AQ-lf Response Page 83 of 178 AGE GROUPS ii:ýHH I x ca zL WL 0 0 z 2-.1 -H Fl a.5 10 1 15 20 TOTAL LENGTH (CM)DIRON NUCLEAR GENERATING STATION UNITS I & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE FIGURE 2.2-3 LENGTH AND AGE FREQUENCY FOR 5 CHANNEL CATFISH COLLECTED FROM ROCK RIVER DURING MARCH 1974 RS-14-051 Enclosure, RAI AQ-lf Response Page 84 of 178.4, o :c 00 O *:*:*:*:*:::*:::*::..................

I---J-I-... .........0 CD to HSII :10 'ON BYRON NUCLEAR GENERATING STATION UNITS 1 & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE FIGURE 2.2-4 LENGTH AND AGE FREQUENCY FOR 56 CHANNEL CATFISH COLLECTED FROM ROCK RIVER DURING APRIL 1974 RS-14-051 Enclosure, RAI AQ-lf Response Page 85 of 178 0'Ul 0 -0............

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.=.. .. ... .. ... .. .* U*~ 0 0 0 K~ (0 9)HbIA AO 'ON BYRON NUCLEAR GENERATING STATION UNITS 1 & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE FIGURE 2.2-5 LENGTH AND AGE FREQUENCY FOR 106 CHANNEL CATFISH COLLECTED FROM ROCK RIVER DURING JULY 1974 RS-14-051 Enclosure, RAI AQ-1f Response Page 86 of 178 (0 0 us 0 0 0 I,-0 z-J I.-0 I,-Hi HSIJ -40 'ON BYRON NUCLEAR GENERATING STATION UNITS 1 & 2 ENVIRONMENTAL REPORT- OPERATING LICENSE STAGE FIGURE 2.2-6 LENGTH AND AGE FREQUENCY FOR 13 CHANNEL CATFISH COLLECTED FROM ROCK RIVER DURING OCTOBER AND NOVEMBER 1974 RS-14-051 Enclosure, RAI AQ-lf Response Page 87 of 178 ILL CREEK BYRON ROCK RIVE LEAF RIVER US:ni 0 YRON STATION FISHING SITES A BYRON AREA (1'-)B -WOODLAND CREEK MOUTH AREA (S-3)F C LEAF RIVER MOUTH AREA (S-4)G O ROCK RIVER TERRACE AREA UD E R-3 AREA CREEK F MUD CREEK AREA G -STRONGHOLD AREA H -BLACKNAWN STATUE AREA R-6 J I -R5 AREA I OREGON BOAT LAUNCH AREA N -L K AREA ABOVE OREGON DAM OREGON L -BELOW OREGON DAM (EAST END)M BELOW OREGON DAM (WEST END)MILES BYRON NUCLEAR GENERATING UNITS 1 & 2 ENVIRONMENTAL REPORT -OPERATING FIGURE 2.2-7 ,e 1_STATiON LICENSE STAGE ROCK RIVER FISHING SITES WHERE FISHERMEN WERE INTERVIEWED BETWEEN MAY 5 AND SEPTEMBER 28, 1974 RS-14-051 Enclosure, RAI AQ-lf Response Page 88 of 178 BYRON STATION ENVIRONMENTAL REPORT OPERATING LICENSE STAGE VOLUME 2 COMMONWEALTH EDISON COMPANY RS-14-051 Enclosure, RAI AQ-lf Response Page 89 of 178 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 AMENDMENT NO. 3 MARCH 1982 CHAPTER 4.0 -ENVIRONMENTAL EFFECTS OF SITE PREPARATION, STATION CONSTRUCTION, AND TRANSMISSION FACILITIES CONSTRUCTION TABLE OF CONTENTS PAGE 4.1 SITE PREPARATION AND STATION CONSTRUCTION 4.1-1 4.1.1 Construction Schedule 4.1-1 4.1.2 Land Use 4.1-1 4.1.3 Water Use 4.1-4 4.1.4 Montitoring Program 4.1-5 4.1.4.1 Terrestrial Studies 4.1-5 4.1.4.1.1 Summary of 1974 Sampling Results 4.1-5 4.1.4.1.2 Summary of 1975-1976 Sampling Results 4.1-7 4.1.4.1.3 Summary of 1976-1977 Sampling Results 4.1-8 4.1.4.1.4 Summary of 1977-1981 Bird Impaction 3 Surveys 4.1-9 4.1.4.2 Aquatic Studies 4.1-9 4.1.4.2.1 Summary of 1974 Sampling Results 4.1-9 4.1.4.2.2 Summary of 1975-1976 Sampling Results 4.1-12 4.1.4.2.3 Summary of 1976-1977 Sampling Results 4.1-15 4.1.4.3 Special Surface Water and Groundwater Studies 4.1-18 4.2 TRANSMISSION FACILITIES CONSTRUCTION 4.2-1 4.2.1 Access Roads 4.2-1 4.2.2 Clearing Methods 4.2-1 4.2.3 Installation Procedures 4.2-1 4.2.4 Consideration of Erosion Problems 4.2-1 4.2.5 Effects on Agricultural Productivity 4.2-2 4.2.6 Plans for Wildlife Protection 4.2-2 4.2.7 Plans for Disposal of Debris 4.2-2 4.2.8 Restoration Plans 4.2-2 4.2.9 Environmental Impact 4.2-3 4.3 RESOURCES COMMITTED 4.3-1 4.3.1 Land Resources 4.3-1 4.3.2 Water Resources 4.3-1 4.3.3 Materials Used 4.3-1 4.4 RADIOACTIVITY 4.4-1 4.5 CONSTRUCTION IMPACT CONTROL PROGRAM 4.5-1 4.5.1 Background 4.5-1 4.5.2 Responsibilities 4.5-1 4.0-i RS-14-051 Enclosure, RAI AQ-lf Response Page 90 of 178 Byron ER-OLS AMENDMENT NO. 3 MARCH 1982 TABLE OF CONTENTS (Cont'd)PAGE 4.5.3 Control Measures 4.5-2 4.5.3.1 Erosion 4.5-2 4.5.3.2 Dust 4.5-2 4.5.3.3 Noise 4.5-2 4.5.3.4 Transportation Access 4.5-2 4.5.3.5 Dredge Materials 4.5-3 4.5.3.6 Aquatic and Terrestrial Ecology 4.5-3 4.5.3.7 Oils and Chemical Wastes 4.5-3 4.5A CONSTRUCTION IMPACT CONTROL LETTER 4.5A-i 4.0-ii RS-14-051 Enclosure, RAI AQ-lf Response Byron ER-OLS Page 91 of 178 CHAPTER 4.0 -ENVIRONMENTAL EFFECTS OF SITE PREPARATION, STATION CONSTRUCTION.

AND TRANSMISSION FACILITIES CONSTRUCTION LIST OF TABLES'NUMBER TITLE PAGE 4.1-1 Land-Use Categories, Acreages, and Percentages of Total Area Mapped 4. 1-21 4.1-2 Field Parameters for 1975-1976 Sampling 4.1-22 4.1-3 In-Situ Quality Profiles for 1975-1976 Sampling 4.1-23 4.1 -4 Fall Water Chemistry at Byron Station on October 7, 1975 4.1-25 4.1-5 Winter water Chemistry at Byron Station on February 12, 1976 4. 1-26 4. 1-6 Spring Water Chemistry at Byron Station on April 29, 1975 4.1-27 4.1-7 Summer Water Chemistry at Byron Station on July 8, 1975 4.1-28 4.1-8 Trace Metals Analysis for 1975-1976 Sampling 4.1-29 4.1-9 Bacteriology Analysis for 1975-1976 Sampling 4.1-33 4.1-10 Field Parameters for 1976-1977 Sampling 4.1-35 4.1-11 In-Situ Water Quality Profiles for 1975-1976 Sampling 4.1-36 4.1-12 Spring Water Chemistry at Byron Station on May 24, 1976 4.1-38 4.1-13 Summer Water Chemistry at Byron Station on August 2, 1976 4.1-39 4.1-14 Fall Water Chemistry at Byron Station on November 1, 1976 4. 1-40 4.1-15 Winter Water Chemistry at Byron Station on February 9, 1977 4. 1-41 4.1-16 Trace Metals Analysis for 1976-1977 Sampling 4. 1-42 4.1-17 Bacteriology Analysis for 1976-1977 Sampling 4.1-46 4.1-18 Surface Water Chemistry at Byron Station 4. 1-48 4.1-19 Groundwater Chemistry at Byron Station 4.1-49 4.4-1 Estimated Doses to Unit 2 Construction Work Force After Unit 1 Startup 4.4-3 4. 0-iii RS-14-051 Enclosure, RAI AQ-lf Response Byron ER-OLS Page 92 of 178 CHAPTER 4.0 -ENVIRONMENTAL EFFECTS OF SITE PREPARATION, STATION CONSTRUCTION.

AND TRANSMISSION FACILITIES CONSTRUCTION LIST OF FIGURES NUMBER TITLE 4.1-1 Construction Schedule for Byron Station 4.1-2 Vegetation and Land Use of the Byron Station Site and Adjoining Areas, Summer 1976 4. 1-3 River Soundings in Vicinity of Byron Station Intake and Discharge 4.1-4 Terrestrial Sampling Areas for May and October 1974 Sampling Periods 4.1-5 Aquatic Sampling Sites Near the Byron Station 4.1-6 Surface Water Sampling Stations and Disposal Areas Near Byron Site 4.1-7 Locations of Wells Used in the Water Quality Monitoring System 4. 0-iv RS-14-051 Enclosure, RAI AQ-lf Response Page 93 of 178 Byron ER-OLS AMENDMENT NO. 3 MARCH 1982 endangered faunal species were observed on the site or are expected to reside there.Comparisons of the survey results for Years 1 and 2 show no detectable faunal changes except for the preemption of some additional habitat because of station site expansion, and the planting of several acres of former cropland and pasture in wildlife-food species. Comparisons of seasonal bird faunas showed high similarities between the data for Years 1 and 2, especially with regard to the more dominant species. Common mammalian species detected onsite were generally the same during the 2 years. For both mammals and birds, some yearly variation appeared in the relative abundances of common species. This variation, however, was the result of sampling methodology and normal variation.

None of the variations observed can be reasonably attributed to station construction activities.

No adverse impacts of construction activities on the fauna of the site were detectable.

1 4.1.4.1.4 Summary of 1977-1981 Bird Impaction Surveys The avifaunal survey to document any migratory bird fatalities that may result from direct collision with the meteorological tower, cooling towers, or containment and turbine buildings began in August 1977. During the 1977 to 1979 survey periods, no dead or injured birds were observed.

During the 1980 survey, nine dead birds were documented during the fall migratory season (October).

There were five golden-crowned kinglets, one long- 3 billed marsh wren, one white-throated sparrow, one tennessee warbler, and one warbler that could not be more completely identified due to its condition.

All of these birds were collected from around the bases of the natural draft cooling tower structures.

During the 1981 survey period, no impaction mortalities were reported.

The results as briefly described here were reported to the U. S. Fish and Wildlife Service and the Illinois Department of Conservation.

4.1.4.2 Aquatic Studies Aquatic monitoring sampling locations are shown in Figure 4.1-5.4.1.4.2.1 Summary of 1974 Sampling Results These data are derived from the "Sixth Quarterly Report" of EAI.Water Chemistry:

Changes observed in the chemistry of the Rock River and its tributary streams from September 1973 through October 1974 resulted mainly from seasonal changes in temperature, precipitation, and river discharge rates. The section of the Rock River adjacent to the Byron Station and the tributary 4.1-9 RS-14-051 Enclosure, RAI AQ-lf Response Page 94 of 178 Byron ER-OLS AMENDMENT NO. 3 MARCH 1982 streams draining this area appeared to be in a state of moderate eutrophication.

Concentrations of all chemical parameters were within Illinois standards with the exception of phosphorus and, in one instance, copper. Nitrate and phosphate were consistently above levels reported capable of producing nuisance algal blooms.The chemistries of the river and tributary streams were similar on most dates sampled at all nine stream stations except W-3 and W-1. The intermittent nature of the streams appeared to be the major factor affecting the observed differences.

Bacteria: Total bacteria, fecal coliform, and fecal streptococcus counts for the five Rock River stations fluctuated seasonally with the highest counts occurring in April during peak runoff and the lowest counts occurring in October 1974. Similar fluctuations in total coliform counts were observed, but the highest counts occurred in January rather than April. Stream stations had a more varied response to seasonal changes than the river stations.4.1-9a RS-14-051 Enclosure, RAI AQ-lf Response Page 95 of 178 Byron ER-OLS Seasonal fluctuations in fecal streptococcus numbers corresponded closely with total bacteria and fecal coliform bacteria counts at the river stations and fecal coliform counts at the stream stations.

Fecal coliform to fecal streptococcus ratios (FC:FS)varied appreciably on a seasonal basis. Ratios for the five Rock River stations were indicative of contributions from domestic wastes. Ratios greater than 4.0,- which occurred in September and October 1973, were indicative of recent pollution by domestic wastes. Ratios between 0.6 and 4.0, which occurred during the remaining sampling dates, were also indicative of domestic wastes.Phytoplankton:

Phytoplankton was sampled at two river stations from September 8, 1973, through October 8, 1974. A total of 118 taxa were identified during the study. Taxa included 59 diatoms, 43 green algae, 9 blue-greens, 4 euglenoids, 2 pyrrophytes, and 1 cryptophyte.

Numerically, diatoms dominated the community throughout the study, ranging from 76.38% on October 8, 1974 to 100% on January 28, 1974. Dominant forms occurring during the course of the study included Cyclotella meneghiniana, Melosira ambipua, M.granulata, 1. granulata var. anqustissima, Stephanodiscus hantzschii, S. minutus, S. subtilus, and Nitzschia palea. These forms are commonly found in eutrophic waters.Zoop.lankton:

Zooplankton samples were collected on six occasions from September 1973 through October 1974. Samples were taken September 11 and October 16, 1973, from river stations R-1 through R-5 and from tributary stream stations S-4, S-5, and S-6.Samples collected during the remaining periods (January 28, April 30, July 30, and October 8, 1974) were taken from R-2 and R-5 only.Total zooplankton numbers throughout the study (at river stations) ranged from a low of 2 organisms per liter from station R-2 on January 28, 1974, to a high of nearly 350 per liter from station R-2 on April 30, 1974. Taxonomic composition of zooplankton collected during the study included 3 copepod and 7 cladocerau species, 14 genera of protozoans, and 18 rotifer genera.Rotifers were the numerically dominant taxa in Rock River samples on five of six occasions and in one of two periods of stream sampling.

Most commonly occurring forms included juvenile copepod stages (nauplii and copepodites), cladoceraus Bosmina and Chydorus, and rotifer genera Brachionus, Keratella, and Svnchaeta.

4.1-10 RS-14-051 Enclosure, RAI AQ-lf Response Byron ER-OLS Page 96 of 178 Periphyton:

The periphyton community was sampled at five river stations (R-1 through R-5), three tributary stream stations (S-3, S-4, and S-5 from September through recember 1973 and S-3, S-5, and S-6 from January through September 1974), and two woodland pool stations (W-1 and W-2) from September 1973 through September 1974.A total of 266 algae taxa were identified in September 1973 through September 1974 samples. Taxa included 181 diatoms, 64 green algae, 1 chrysophyte, 12 blue-green algae, 7 euglenoids, and 1 pyrrhophyte.

Throughout the study, the community was dominated by diatoms comprising from 90% to 100% of the total units counted. Dominant forms occurring during the study included fMelosira crranulata var.anqustissima, Nitzschia linearis, Navicula viridula var.avenacea, Gompbonema olivaceum, and Gomphonema parvulum, all of which are commonly found in eutrophic, waters.Benthos and Macroinvertebrates:

Benthos collected during the six sampling months in the period of September 1973 through October 1974 were separated into approximately 101 taxa from five invertebrate phyla. Eight types of benthic substrates were described from samples collected during this study period. Samples containing coarse gravel were found to support the greatest number of invertebrate taxa.Correspondingly, coarse gravel was the substrate type most often collected in benthos samples. Seventeen substrate types and combinations were described from the samples.Macroinvertebrates collected during the 12 months from September 1973 to September 1974 were separated into approximately 115 taxa from four invertebrate phyla. Ciptera accounted for the largest number of macroinvertebrates collected over the whole sampling period (4868), followed by Ephemeroptera (4244), and Oligochaeta (2120).Fish: Sampling stations in the Rock River and in three tributaries to the river were sampled for adult fish by electroshocking, seining, and hoop-netting.

Based on fish sampling from September 12, 1973, through November 1, 1974, sizable populations of carp (Cyprinus carpio), carpsucker (Carpiodes spp.), redhorse (Moxostoma spp.), and channel catfish (Ictalurus punctatus) exist in the section of the Rock River that includes the area just above the Byron Station to the dam at Oregon, Illinois.

Channel catfish, for which the river is best known, were most abundant in the July 1974 samples. The channel catfish population appeared to be restricted in age and size of individuals.

4.1-11 RS-14-051 Enclosure, RAI AQ-lf Response Page 97 of 178 Byron ER-OLS A 5-month creel survey indicated that channel catfish and carp were the most abundant.

Fishing pressure was greatest below the dam at Oregon and near the mouth of Mud Creek; fishing success was greatest at the Woodland Creek mouth area and at the Oregon dam.Sixty fish larvae and two fish eggs, predominantly minnow species, were collected from river and str'eam stations between April 23 and July 3, 1974, inclusive.

4.1.4.2.2 Summary of 1975-1976 Samrling Results These data for the first year of a 5-year aquatic ecology moni-toring survey, which was conducted on the Rock River adjacent to the Byron Station and on the tributary streams draining this area, are derived from the annual report of the construction and preoperational aquatic ecology monitoring program.Water Chemistry:

The field-measured parameters studied (pH, light penetration, transparency, and turbidity) are presented in Table 4.1-2, and profiles of temperature, dissolved oxygen, current velocity, and conductivity are presented in Table 4.1-3. The results of the routine water chemistry analyses are given in Tables 4.1-6 through 4.1-7, and the trace analyses are in Table 4.1-8. Table 4.1-9 summarizes the results of the bacteriological studies.A number of water quality parameters were found to exceed the Illinois Pollution Control Board Rules and Regulations that became effective March 20, 1975 under the terms of the Illinois Environmental Protection Act.General Standards:

Ammonia (NH., as N}): The limit cf 1.5 mg/liter was exceeded during the spring at all stations but W-2.Phosphate (PO as P): Ortho-phosphate levels exceeded the limit of 0.05 mg/liter at all stations during the summer and winter.In the spring, all stations but W-2 exceeded the limit, and in the fall all stations except R-2., R-4, S-6, and W-2 exceeded the limit.PH: Stations R-1 and R-2 fell below the range of 6.5-9.0 pH units during the summer.Iron (Fe): The limit of 1.0 mg/liter was exceeded at all stations during the spring and summer. .Duning the fall, Station s-6 exceeded the limit, and Stations R-2, 4-6, and W-2 exceeded it in the winter.4..1-12 RS-14-051 Enclosure, RAI AQ-1f Response Page 98 of 178 Byron ER-CLS Copper (Cu): The limit of 0.02 mg/liter was exceeded only at station S-4 during the spring.Public and Food Processing Water Supplv Standards:

Iron (Fe): The limit of 0.3 mg/liter was exceeded at all stations during all quarters.Total Dissolved Solids (TDS): The limit of 500 mg/liter was exceeded only at Station W-2 during the spring.All other parameters specified in these two standards categories that were tested for were within permissible limits.comparison of the 1975 through 1976 survey results with those of Environmental Analysts, Inc. (CECo 1973, EAI 1975) revealed only a few differences.

Summer pH values were generally found to be higher in previous studies than those recorded in the 1975 through 1976 survey. Nitrate concentrations were often much higher in the previous studies. Turbidity values recorded by EAI.were uniformly lower than those measured during the 1975 through 1976 study, and Secchi disk depths were greater in the EAI data.The most striking difference between these two data sets was in the reported levels of trace metals. The concentrations of iron, copper, cadmium, and zinc have all apparently increased since the EAI studies were conducted.

Increases in levels of cadmium, copper, and particularly zinc were also noted in fish liver samples over the same period.Phvtoplankton:

Studies by EAI (CECo 1973, EAI 1975) covering the period from May 1972 through October 1974 as well as the 1975 through:1976 study showed that the phytoplankton of the Rock River was dominated by centric diatoms, with species of the pennate type present as occasional dominants.

Species found to be dominant during the 1975 through 1976 program were in-most cases the same as those reported as dominants in the previous studies. Phytoplankton densities (both numbers and biovolume) during the 1975 through 1976 program were considerably higher than those reported by EAI during the same seasonal periods.Zooplankton:

The structure of the zooplankton community in the Rock River, as exhibited in 1975 through 1976 quarterly samples taken in the vicinity of the Byron Station, is quite typical of lotic systems.River zooplankton is usually noted for extreme dominance by rotiferan species (EH&A 1976b). Most zooplankton groups are better adapted to either littoral or pond habitats, but a number of rotifer species are able to exploit the lotic systems and reach high population densities, particularly in large slow-flowing rivers with dense phytoplankton:

communities (EHIA 1976b).4.1-13 RS-14-051 Enclosure, RAI AQ-lf Response Page 99 of 178 Byron ER-OLS A number of species of copepods are adapted to open waters, but relatively few species are abundant in flowing waters.The Rock River clearly satisfies Williams' (EH&A 1976b) criteria, and the results of zooplankton sampling in the 1975 through 1976 study and previous ones (CECo 1973, EAI 1975) were typically riverine.

The number of species found in this and the previous studies were virtually the same. Spring and fall samples yielded the greatest densities of zooplankton, and rotifers usually predominated except when copepod nauplii were at their maximums in winter and early-spring.

Periphyton:

During the 1975 through 1976 study, all stations were.heavily dominated by diatoms. Other groups, notably the Chlorophyta and Cyanophyta, were locally important during the summer. Although centric diatoms were important in the periphyton communities,.

they did not dominate as completely as they did in the phytoplankton community.

Standing crop sizes and seasonal patterns of abundance in this study were considerably different from those found by EAI, although the species recorded as dominants in both studies were very similar.Species diversity and redundancy values, and the species noted as dominants in this survey indicated that the communities are probably subjected to at least a moderate degree of enrichment.

Benthos and Macroinvertebrates:

Dredge samples showed that the benthic fauna at all Rock River stations except R-I were dominated hy the Tubificidae.

Station R-1, and to a lesser extent S-3, had a fauna that was distinct from those of the remaining Rock River stations.

This difference was apparently due to the coarser sediments sampled at these stations.

The fauna of W-2 was different from that of any other station, probably because of the nature of the small stream habitat. The results of the artificial substrate program showed that all stations were similar in this respect and were dominated by organisms characteristic of erosional habitats.Fish: The 1975 through 1976. fish study produced 38 species of fish from the Rock River. Estimates from the literature (CECo 1973, EAI 1975) showed that 74 fish species occur in the system.Rough fish populations (suckers, carp, and buffalo) dominated the system both by number and weight. Game fish populations except for Ictalurus punctatus (channel catfish) consisted of relatively few individuals.

4.1-14 RS-14-051 Enclosure, RAI AQ-lf Response Page 100 of 178 Byron ER-CLS The condition factor, age class information, length frequency analysis, and incidence of parasitism provided no unexpected or abnormal survey results. Samples collected above and below the Byron Station discharge point gave no clear indication of differences in productivity.

Creel census data indicated lower catches than those of the previous EAI survey.4.1.4.2.3 Summary of 1976-1977 Sampling Results These data for the second year of a 5-year aquatic ecology monitoring survey, which was conducted on the Rock River adjacent to the Byron Station and on the tributary streams draining this area, are derived from the annual report of the construction and preoperational aquatic ecology monitoring program.Water Chemistry:

The field-measured parameters studied (pH, light penetration, transparency, and turbidity) are presented in Table 4.1-10, and profiles of temperature, dissolved oxygen, current velocity, and conductivity are presented in Table 4.1-11. The results cf water c.,emistry analyses are given in Tables 4.1-12 through 4.1-15, and the trace metal analyses in Table 4.1-16. Table 4.1-17 summarizes the results of the bacteriological studies.Some water quality parameters were found to exceed the Illinois Pollution Control Board Rules and Regulations that became effective March 20, 1975, under the terms of the Illinois Environmental Protection Act.General Standards:

Ammonia (NH 4 as N): The limit of 1.5 mg/liter was exceeded during the winter at Stations R-1, F-2, R-3, R-5, and S-3.Phosphate (P0 4 as P): Ortho-phosphate levels exceeded the limit of 0.05 mg/liter at all stations sampled in spring except R-1 and W-2, at all but W-2 in summer, at no stations in fall, and at all but S-5 in winter (Station W-2 was frozen).Iron (Fe): The limit of 1.0 mg/liter was exceeded at Station R-2 in spring, and at Station R-3 in summer.C (Cu): Concentrations of copper exceeded the limit of 0.02 mg/liter in winter at Stations R-1, R-3, S-3, and S-6.Public and Food Processing Water Supply Standards:

Iron (Fe): The limit of 0.3 mg/liter was exceeded at all stations in spring and summer and at Stations R-4, S-5, and S-6 in fall.4.1-15 RS-14-051 Enclosure, RAI AQ-lf Response Byron ER-OLS Page 101 of 178 Total Dissolved Solids (TDS): The limit of 500 mg/liter was exceeded in fall at all stations but W-2, and in winter at all but Station S-6 (Station W-2 was frozen).All other parameters specified in these two standards categories that were tested for were within the standard limits.Comparison of data collected during Year 2 with data of Year 1 (1975 through 1976) and with that of EMI (CECo 1973, EAI 1975)shows that several of the parameters that had shown an increase from EAI values in Year 1 of the current study declined to levels more comparable with the previous data. The high summer pH values of Year 1 were not repeated.

Nitrate values remained well below the high values recorded by RAI. Under the much-reduced flow regime, water clarity improved greatly, as evidenced by turbidity and Secchi disk measurements.

The amount of total dissolved solids increased considerably, however.The marked differences between EAI's trace metal concentrations and those of Year 1, especially concentrations of iron, copper, cadmium, and zinc, were less during the 1976 through 1977 sampling.

Cadmium levels were now comparable to those of the EAI study. Iron was still present in notably higher concentrations than in the EAI study, although much lower than in Year 1 of the monitoring program. Copper and zinc concentrations were still generally higher than those found by EAI, but had dropped considerably and were now comparable in some quarters.It is possible that the many large differences between the results reported by EAI and those found in the Year 1 of the 5-year monitoring study were due in part to floods in the spring of 1975, which may have leached deposits of chemicals from bottom deposits.

With lower flows from the fall of 1975 through the end of the 1976 through 1977 study year, this leaching declined, and with it the levels of metal concentrations.

Phytoplankton:

No consistent differences in phytoplankton standing crop or pro-duction parameters were evident between Stations R-2 and R-5.Diversities were generally slightly higher during the 1976 through 1977 study year and followed a different seasonal pattern than during 1975 through 1976. Dominant species and their seasonal patterns of abundance, on the other hand, tended to be quite similar in the two years, with the greatest differences occurring during the summer samples. Phytoplankton community structure and production parameters continued to indicate, as in previous studies (CECo 1973, EAI 1975, EH&A 1976b), that the Rock River is at least moderately enriched.4.1-16 RS-14-051 Enclosure, RAI AQ-lf Response Page 102 of 178 Byron ER-OLS Zooplankton:

In Year-2 samples, zooplankton were again typical of riverine systems, dominated strongly by rotifers, except in winter. The alteration in sampling schedule may he responsible for many of the differences in the seasonal composition of the zooplankton, with samples collected at different points in the successional cycle. These variations within comparable seasons are indicative of the magnitude of variation that can he expected within a season. Some differences among stations may be due to short-lived pulses in abundance that coincide with a water quality change downstream.

Severe winter weather provokes the greatest changes in community composition and density, as seen in comparisons between winter and other quarters, and between winters.Periphyton:

The periphyton community of the Rock River was heavily dominated ty diatoms. Other algal groups were important only during the warmest months. Species diversity and redundancy were similar to those encountered during 1975 through 1976. These values and the dominant species present indicate that the Rock River continues to be at least moderately enriched.

Species composition, standing crops, and seasonal patterns of abundance were generally similar to those of the previous year. As in the 1975 through 1976 study year, the biomass values measured during the 1976 through 1977 study year did not consistently correlate with density by count or biovolume.

Benthos and Macroinvertebrates:

Both the natural and the artificial substrate communities observed in Year 2 were generally similar to those observed in the 1975 through 1976 study. The natural substrates continued to be dominated by the Tubificidae and Chironomidae, particularly at those stations having the softest or finest grained sediments.

Species diversity was stable during the Year 2, relative to that of the previous year, and was at an intermediate level between the low diversities found in spring and summer (1975) and high diversities of the fall. The species present in the sediment varied little between years. Although the rank order of dominant species was somewhat different in the two years, no particular significance could be ascribed to the changes.The artificial substrate communities showed few differences between Year 1 and Year 2. Relative to 1975, elevated standing crops and lowered summer-fall (July, August, September) diversity was a result of large dipteran (Tanytarsus sp.) populations that peaked in August and September.

These changes may have resulted from an increase in food supply, represented by the increased periphyton standing crop observed during the second year.4.1-17 RS-14-051 Enclosure, RAI AQ-lf Response Byron IR-OLS Page 103 of 178 Although total standing crops did not show any consistent pattern among stations, differences in dominant species and associated standing crops were encountered between left and right bank stations with much greater frequency than were differences between stations located along the same bank. The right bank artificial substrate communities appeared to contain a greater proportion of Diptera and fewer Ephemercptera than the left bank communi ties.Fish: The 1976 through 1977 fish study found 40 species of fish, 5 of which were not found during the 1975 through 1976 sampling.Rough fish such as carp, suckers, and buffalo continued to dominate the system by weight, although forage species, primarily minnows, generally had the largest number of individuals.

Channel catfish was again the most abundant game fish. Adult game fish collected were a higher percentage of the total population during the 1976-1977 sampling than during the 1975-1976 sampling.Condition factors, year class data, and parasitism data yielded no abnormal results. Creel census data indicated poorer fishing during the 1976-1977 census period than during the 1975-1976 period. The differences between years were significant, however, only in the fall hoop nets when much lower temperatures and flows occurred during the 1976-1977 sampling period and no fish were caught. No rare and endangered species of fish were caught during the 1976-1977 sampling.4.1.4.3 Special surface Water and Groundwater Studies A detailed site geotechnical investigation identified an area of surface water and groundwater contamination by toxic materials that existed before the property was purchased by CECo.An initial investigation of the contamination problem was performed by Dames I Moore from May 25 through July 5, 1974, and the results are contained in the "Report, Investigation

-Buried Toxic Materials and Extent of Contamination Near Byron, Illinois", dated July 22, 1974 (Eames & Moore 1974). A spring 1975 sampling and measuring program was conducted from April 8 through April 20, and the results of this program are presented in the "Report, Results of Spring 1975 Sampling and Measuring Program: Addendum to July 22, 1974 Report", dated May 7, 1975 (Dames & Moore 1975).The July 22 report concluded that drums and barrels containing toxic chemical wastes, such as cyanide, arsenic, and cadmium, and bulk lots of solid wastes, such as those containing zinc and lead, and other refuse had been placed on and adjacent to the Dirk farm before its purchase by CECo. CECo employed Conservation Chemical Company of Kansas City, Missouri, a licensed waste disposal firm, to remove the drums and barrels, 4.1-18 RS-14-051 Enclosure, RAI AQ-lf Response Page 104 of 178 Byron ER-OLS TABRL 4.1-2 FIELD PARAMTERS FOR 1975-1976 SAMPLING LIGHT PEIETRATION STATION p. (Secchi) (cm)SAMPLE Spring 1975 (April 29)Summer 1975C (July 7 and 10)Fall 1 9 7 5c (October 7)Winter 1976c (February 12)R-1 R-2 R-3 R-4 R-5 S-5 S-6 W-1 W-2 R-1 R-2 R-3 R-4 R-5 S-3 S-5 S-6 W-2 R-1 R-2 R-3 R-4 R-5 S-3 S-5 S-6 W-2 R-2 R-3 R-4 R-5 S-3 S-6 W-2 7.8 7.2 7.6 7.9 a 7.9 7.8 7.2 a 6.4 6.4 6.6 6.8 6.9 6.8 7.0 7.0 7.4 8.5 8.7 8.7 8.7 8.7 8.5 8.7 8.7 b 7.8 7.8 7.7 7.8 7.8 7.8 7.9 12.00 12.00 12.00 13.00 14.00 10.00 13.00 b b 22.00 22.00 24.00 25.00 19.00 17.00 19.00 a b 16.00 18.00 16.00 13.00 13.00 18.00 9.00 10.00 b 48.30 45.80 55.30 45.80 60.90 a b TRANSPARENCY (extinction coeff. /cm)0.140 0.140 0.140 0.130 0.120 0.170 a b b 0.080 0.080 0.070 0.070 0.100 0.100 0.090 a b TURBIDITY (JTU)289 254 248 232 a 274 233 b b 364 190 19 189 135 171 194 a b 338 334 406 348 282 320 353 282 b 0.110 0.090 0.110 0.130 0.130 0.090 0.190 0.180 b 0.001 0.001 0.007 0.001 0.003 a b 8 14 9 10 9 12 b aNot sampled due to field error.bNot part of sample program.CStation W-1 was dry.4.1-22 RS-14-051 Enclosure, RAI AQ-lf Response Page 105 of 178 Byron ER-OLS TABLE 4.1-3 IN-SITU WATER OUALITY PROFILES POR 1975-1976 SAMPLING DISSOLVED DEPTH TEMPERATURE OXYGEN VELOCITYa STATION (M) (.C .(mg/liter) (r/sec)SAMPLE Spring 1975 iApril 29)Summer 1 9 7 5c (July 7 and 10)CONDUCTIVITY (Pmho)R-1 0.0 2.2 R-2 0.0 1.0 2.0 R-3 0.0 4.0 R-4 0.0 4.0 R-5 0.0 1.0 2.0 s-3 0.0 3.0 S-5 0.0 1.8 S-6 0.0 2.5 W-lb 0.0 W- 2b 0.0 R-I 0.0 1.0 1.5 R-2 0.0 1.0 2.0 R-3 0.0 1.0 2.0 R-4 0.0 1.0 2.0 3.0 R-5 0.0 1.0 2.0 S-3 0.0 1.0 S-5 0.0 1.0 S-6 d 0.0 1.0 W-2 0.0 10.5 10.2 13.0 13.0 13.0 9.5 9.0 9.5 9.1 13.0 13.0 13.0 9.0 9.0 9.5 9.2 10.6 9.5 19.0 16.2 24.2 24.0 24.0 26.1 26.3 26.3 26.0 26.0 26.0 26.0 26.5 26.5 26.5 25.4 25.1 25.1 26.0 26.0 26.0 26.0 26.0 25.8 24.0 10.30 10.40 10.20 10.20 9.50 10.90 11.10 10.90 10.70 10.40 10.20 9.40 10.70 10.70 11.00 10.90 1L.00 10.00 9.40 10.80 6.40 7.20 7.00 7.30 7.00 7.30 7.10 7.10 7.00 7.00 6.80 6.90 6.80 6.80 6.50 6.20 7.00 7.20 7.80 7.60 7.40 7.40 7.20 0.82 0.85 0.60 0.80 0.65 0.60 0.60 0.70 0.20 0.50 0.50 0.40 0.50 0.50 0.40 0.60 0.60 0.40 0.40 0.50 0.40 0.30 0.40 0.30 0.40 0.20 0.00 0.00 0.00 315 290 368 370 370 310 329 311 320 360 360 365 330 340 300 305 320 360 300 458 550 550 550 600 600 600 600 590 600 600 570 590 590 590 590 550 610 600 600 610 590 650 600 a Blanks in column headed 'VELOCITY" indicate data not taken, except where footnoted.

b At Stations W-i and W-2 the velocity was unmeasurable.

c Station W-1 was dry.d Velocity was not measured'at Station S-6.4.1-23 RS-14-051 Enclosure, RAI AQ-1f Response Page 106 of 178 Dyroc fl-OLS TABLE 4.1-3 Cont'd)DISSOLVED DEPTH TESERiATUI OXYENe STATON VAO 2°S.V... -... (wSl/4iteU)

VELOCITY CONDUCTIVITY (misec) Ciamho)Fall 1975c (October 7)Winter 1976f'(February 12)3-1 0.0 1.0 R- 29 0.0 1.0 2.0 R-3 0.0 1.0 2.0 8-4 0.0 1.0 2.0 R-5 0.0 1.0 2.0 8-3 0.0 S*5 0.0 S-6 0.0 1.0 W-2 h 0.0 R-2 0.0 1.0 1.8 R-3 0.0 1.0 1.5 R-4 0.0 1.0 2.0 3.0 R-S 0.0 1.0 2.0 S-3 0.0 1.0 S-6 0.0 1.0 W-2J 0.0 16.2 16.0 15.0 15.0 15.0 15.6 15.4 15.2 15.5 15.0 15.0 15.2 14.2 14.8 16.0 17.5 16.9 13.6 15.4-0.2-0.2-0.5 0.0-0.3-0.3-0.5-0.5-1.0-1.0-0.8-0.8-0.8 0.0-0.5-0.5-0.5 4.2 15.00 15.00 14.40 13.10 14.00 15.00 15.00 15.00 15.00 14.50 14.20 15.00 15.00 14.60 15.00 15.00 5.00 12.00 8.70 12.40 12.40 12.80 14.00 14.20 14.40 11.20 11.00 11.00 11.00 14.80 14.60 14.40 13.81 14.20 10.60 10.50 11.60 0.40 0.40 0.30 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.20 0.10 0.20 0.10 0.20 0.10 0.10 0.10 0.12 0.18 0.10 0.15 0.15 0.10 0.15 0.20 0.20 0.15 0.15 0.18 0.10 0.08 0.10 0.00 0.00 0.00 486 600 492 650 620 482 580 550 455 580 580 670 492 455 490 530 530 550 550 550 408 283* Value of 15.00 is upper limit of detection.

f Station W-I was dry.8 Conductivity data not taken at Station R-2 in fall.h Velocity unmeasurable and conductivity not measured at StAtion W-2 in fall.i For winter 1976, the conductivity meter was broken, so all surface water samples were analyzed in the lab, and Stations R-1 and S-5 were inaccessible because of ice.J Velocity not measured at Station W-2 in winter.4.1-24 RS-14-051 Enclosure, RAI AQ-lf Response Page 107 of 178" Byron ER-OLS-.9-- .0: Co. .g. 4.14.4 ...4,-t.,4 m040,4 000 000; .00 .4 000; tome 0,,0" I..0 a U 50'.4E~.4 man a.400'(En'..~ 0-4'.40 no U 1-00 a'a~Ea 4~00 C'01a41 0041-I o a. ad 444a41'("tEt' I 440. 0.4~MI dl~0 a'4 a'WE, O N taco t rt 000 WOW .IM " ,O a! 9 c; .; 0 cooo coo a: c: 96.0 cooo cooo coo 1! o 01., 1! ý c coo cooo I A 00!0! 1!1 OoW 1WO WeE M9t 0MW M!t1aO1 ! ! 1ý1 zo 0400 040404 000 040W 00W 000 00W WOW NNN WOW 00W 000 WOO OEWW 1! ,-i I Avý999 9 1oo 1! c!c!.1ý.=c! In c! c: 1ýMOO 04040 44.00 NOW M,4N .0MM .0MW 0.4W ~4~4 0EMMMM 0040 .000 0040 tototo MOM .0MM toOto MMM MOM .0MM .0MM .0MM .0MM .0MM -4MM NMM 000 WOW '.400 WM,.4 ecat 000 ONe toSto 000 MM .0.0.0.0MM MME, .0MM .0MM .0MM .0MM .0MM U S U 4.1-25 RS-14-051 Enclosure, RAI AQ-lf Response Page 108 of 178 Byron ER-OLS U oh a E4. 0.0 W 0 A s.4 9C% .4CC 0.0C 0.4. 00(4 less 8. .0 1ýC C! C!C CC C C!C .4!( c!19 9 9 9c 9 9: 000~ ~ ZZ 00 0 0000 0 C 0(4 C C 4CC C4 C C N t 4N 000' 4CC C40 .4. "1. A".4, 000-I 4 a C 0 5.4 5.C 0 0.4 4..C 4.8 C U a 9 C1.!1!c 54 C 44 4!cO c!`ý N 1! 7 *1! ý 1!0 C; °000 00 000 ooo 1; c; Z. Z *0.50 400o 00 000 000 000 W I :::! -00 O'I 00 000 000 00 o4" oct. ! o !m 0.0 .CU .1 0 99°o .. -.4.0 .4 APP.... .4 El "001 C O C04 44 01 0C' .

Id 0.5~I 04 4000 CCC~ C I COC CC C.3'.4C(4 CC44% .40 CCC CCC a C.............

.44.4 0.44 .444 .4(4 .4(4 .5(4 .4(4 0(4 .4:6 0~ ~ *~ ~ ~C C S 44 S 4../--26 RS-14-051 Enclosure, RAI AQ-lf Response Page 109 of 178't ,4 IT C1 di 40 U 000 C 0 444 0 41.4 4440~ 00 00 i'1 oj 00.0~j 4~~oNI a I CI II-I 44444~-444 41 0 44.4 54 1o (ý99 n o m WON .40.4 040.0 4000 00 O@4444 @44040 404040 0.440 404,0 14 8 1 000 1O ; c r- ; c i"!o.! ý .!0.00oo o. o... ... 1!9 0.0o o o C00 04040 11! ý C Byron ER-OLS.400 40..0. ... ..4.4. .©.4 I o4 .o 000 :04 0 004 00 40404 .4 040 4o 9.,-000 000! 0009 009n 000*0c~04044 .%A4 WOW9 40404 40404 40404 00 00 0009! 1: 1.44. @4..4 ,. , -.,,4-4 , 0" o. o.,.I. .=.'4-400 40N-4-4-4 0 000 404040 ONO 0.00 400 @4040 .44,444 10.440-4 -4 400N 40400 WON @40.0 00 004040.40.4400 A 04.4 -4.4 -4.4 -4.4 ' .4 40 00 I -, I I. I -4.1-27 RS-14-051 Enclosure, RAI AQ-1f Response Page 110 of 178 Syron SR-OLS m 00 8., 00 0MM :004 9 o O oo SO O .o C 0 %9 Noo 04M S. ....... ... ..000 000 COO 000 000 000 000 000 000"I,_22 N MM* ~W'0 21 o=S004ýW i om ' .£1 !9-o-~S~.M.M .4.NN 040' me4 m.m NO..°.000 OWN N °NM 000 6oC;c; ; c C! 0 9 cooo r-. 9'rma 040-40 rm X M .4.4 L AWN 9 17 9 9 °i 9 9o1 OmN 0910 C!oo 04m 040 OWA O OO W mmM WOW:= i"g m a :l' :g :M 1 0 't I"'0 S.4.1-28 RS-14-051 Enclosure, RAI AQ-lf Response Page 111 of 178 Byron ER-OLS TABLE 4.1-8 TRACE M-lTAfS ANALYSIS FOR 1975-1976 SAMPLING (All Values in mA/liter)STATION R-1 mean R-2 mean R-3 mean R-4 mean R-mean S-3 mean S-5 mean S-6 mean W-1 mean W-2 mean RE EPLI-ATE Cd 1 0.002 2 0.003 0.003 1 0.002 2 0.002 0.002 1 0.003 2 0.002 0.003 1 0.001 2 0.003 0.002 1 0.002 0.002 1 0.003 2 0.003 0.003 1 0.002 2 0.005 0.004 1 0.001 2 0.003 0.002 1 0.002 2 0.002 0.002 1 0.002 2 0.001 0.002 Cu 0.022 0.014 0.018 0.014 0.014 0.014 0.013 0.010 0.012 0.011 0.014 0.013 ,b 0.019 0.019 0.019.0.008 0.016 0.012 0.013 0.020 0.016 0.011 0.013 0.012 0.009 0.008 0.009 SPRING: APRIL 29, 1975 Fe C n PF cr 7.10 7.41 7.25 6.08 6.32 6.20 5.37 5.94 5.66 5.68 5.53 5.60 7.00 7.00 7.12 7.15 7.13 6.49 6.53 6.51 5.10 5.07 5.08 3.33 3.42 3.38 1.62 1.87 1.74 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.010 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.046 0.047 0.046 0.04X 0.066 0.053 0..034 0.039 0.036 0.041 0.040 0.040 0.031 0.031 0.046 0.046 0.046 0.036 0.038 0.037 0.166 0.077 0.122 0.029 0.027 0.028 0.013 0.029 0.021 0.03 0.02 0.03 0.02 0.02 0.02 0.01 0.01 0.01 0.02 0.01 0.02 0.02 0.02 0.04 0.03 0.03 0.02 0.03 0.03 0.03 0.02 0.03 0.01 0.01 0.01 0.02 0.01 0.02 0.015 0.010 0.013 0.013 0.012 0.013 0.011 0.009 0.010 0.006 0.009 0.008 0.012 0.012 0.011 0.014 0.013 0.007 0.011 0.009 0.009 0.010 0.010 0.006 0.008 0.007 0.004 0.003 0.004 1Re licate 2 was lost in transit.bAsterisk

(*) indicates analysis not done because of lab error.4.1-29 RS-14-051 Enclosure, RAI AQ-lf Response Page 112 of 178 Byron ER-OLS TABLE 4.1-8 (Cont'd)R STATIONC c R-1 mean R-2 mean R-3 mean R-4 EPLI-mean R-5 mean S-3 mean S-5 mean S-6 mean W-2 mean ATE Cd 1 0.002 2 0.002 0.002 1 0.002 2 0.002 0.002 1 0.002 2 0.002 0.002 1 0.003 2 0.003 0.003 1 0.002 2 0.002 0.002 1 0.003 2 0.002 0.003 1 0.003 2 0.002 0.003 1 0.002 2 0.002 0.002 1 0.001 2 0.002 0.002 Cu 0.015 0.011 0.013 0.011 0.011 0.011 0.00e 0.008 0.008 0.009 0.007 0.008 0.006 0.009 0.008 0.006 0.009 0.008 0.008 0.008 0.008 0.006 0.011 0.009 0.007 0.007 0.007 SUMt4ER: JULY 7, 1975 Fe Co _9 7.26 0.008 0.0001 7.13 0.008 0.0001 7.19 0.008 0.0001 4.36 0.005 0.0001 4.66 0.007 0.0001 4.51 0.006 0.0001 4.56 0.005 0.0001 4.26 0.006 0.0001 4.41 0.006 0.0001 4.16 0.004 0.0001 3.75 0.006 0.0001 3.95 0.005 0.0001 3.53 0.005 0.0001 2.90 0.007 0.0001 3.22 0.006 0.0001 3.79 0.006 0.0001 3.96 0.004 0.0001 3.88 0.005 0.0001 4.76 0.006 0.0001 4.14 0.007 0.0001 4.45 0.007 0.0001 3.16 0.005 0.0001 3.04 0.007 0.0001 3.10 0.006 0.0001 3.58 0.007 0.0001 3.80 0.006 0.0001 3.69 0.007 0.0001 Zn 0.033 0.031 0.032 0.028 0.028 0.028 0.027 0.020 0.023 0.019 0.017 0.018 0.017 0.022 0.019 0.015 0.019 0.017 0.022 0.021 0.021 0.014 0.011 0.013 0.014 0.018 0.016 P0 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 C0.r 0.017 0.010 0.014 0.004 0.007 0.006 0.005 0.007 0.006 0.004 0.006 0.005 0.008 0.004 0.006 0.005 0.007 0.006.0.012 0.006 0.009 0.006 0.008 0.007 0.005 0.003 0.004 CStation W-i was dry.4.1-30 RS-14-051 Enclosure, RAI AQ-1f Response Page 113 of 178 Byron ER-OLS TABLE 4.1-I (Cont'd)REPLI-FALL: OCTOBER 7, 1975 STATIONC CATE Cd Cu Fe CO Hg Zn Pb Cr R-1 mean R-2 mean R-3 mean R-4 mean R-5 mean S-3 mean S-5 mean S-6 mean W-2 mean 0.001 0.011 0.74 0.003 0.0001 0.024 0.01 0.004 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.001 0.009 0.010 0.009 0.011 0.010 0.008 0.009 0.009 0.011 0.011 0.011 0.011 0.011 0.011 0.011 0.011 0.011 0.011 0.010 0.011 0.009 0.015 0.012 0.007 0.009 0.008 0.89 0.81 0.85 0.94 0.89 0.65 1.00 0.82 0.77 0.85 0.81 1.09 0.64 0.87 0.83 0.78 0.80 0.78 0.80 0.79 1.16 1.29 1.22 0.24 0.22 0.23 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.011 0.007 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.003 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.0001 0.020 0.022 0.024 0.027 0.025 0.20 0.23 0.21 0.024 0.028 0.026 0.030 0.023 0.026 0.028 0.026 0.027 0.026 0.026 0.026 0.024 0.026 0.025 0.010 0.011 0.011 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.02 0.02 0.02 0.02 0.01 0.02 0.01 0.01 0.01 0.01 0.01 0.01 0.004 0.004 0.004 0.005 0.005 0.005 0.005 0.005 0.005 0.006 0.006 0.005 0.005 0.005 0.005 0.003 0.004 0.003 0.004 0.004 0.004 0.004 0.004 0.003 0.002 0.003 Cstation W-1 was dry.4.1-31 RS-14-051 Enclosure, RAI AQ-lf Response Page 114 of 178 Byron ER-OLS TABLE 4.1-8 (Cont'd)REPLI- WINTER: FEBRUARY 2, 1976 STATIONcd CATE Cd Cu Fe Co Hg Zn Pb Cr R-2 1 0.001 0.008 2.17 0.010 0.0001 0.025 0.01 0.009 2 0.001 0.007 0.67 0.010 0.0001 0.018 0.01 0.013 mean. 0.001 0.008 1.42 0.010 0.0001 0.021 0.01 0.011 R-3 1 0.001 0.010 0.65 0.010 0.0001 0.016 0.01 0.014 2 0.001 0.200 0.65 0.010 0.0001 0.016 0.01 0.012 mean 0.001 0.105 0.65 0.010 0.0001 0.016 0.01 0.013 R-4 1 0.001 0.010 0.56 0.010 0.0001 0.020 0.01 0.010 2 0.001 0.009 0.53 0.010 0.0001 0.016 0.01 0.008 mean 0.001 0.010 0.54 0.010 0.0001 0.018 0.01 0.009 R-5 1 0.001 0.007 0.66 0.010 0.0001 0.016 0.01 0.018 2 0.001 0.010 0.63 0.010 0.0001 0.016 0.01 0.011 mean 0.001 0.009 0.64 0.010 0.0001 0.016 0.01 0.015 S-3 1 0.001 0.006 0.49 0.010 0.0001 0.018 0.01 0.005 2 0.001 0.009 0.47 0.010 0.0001 0.020 0.01 0.005 mean 0.001 0.009 0.48 0.010 0.0001 0.019 0.01 0.005 S-6 1 0.001 0.005 1.56 0.010 0.0001 0.008 0.01 0.005 2 0.001 0.007 1.71 0.010 0.0001 0.010 0.01 0.006 mean 0.001 0.006 1.63 0.010 0.0001 0.009 0.01 0.006 W-2 1 0.001 0.012 2.91 0.010 0.0001 0.024 0.01 0.006 2 0.001 0.006 3.06 0.010 0.0001 0.019 0.01 0.005 mean 0.001 0.009 2.98 0.010 0.0001 0.021 0.01 0.006 CStation W-1 was dry.dStations R-1 and S-3 were inaccessible because of ice.4.1-32 RS-14-051 Enclosure, RAI AQ-lf Response Page 115 of 178 Byron ER-OLS TABLE 4.1-9 BACTERIOLOGY ANALYSIS FOR 1975-1976 SAMPLING (All Values in No. of Colonies/100 ml Except Where Noted)SPRING: APRIL 29, 1975 STANDARD STATION R-1 mean R-2 mean R-3 mean R-4 mean R-5b mean S-3 mean S-5 mean S-6 mean W-1 d mean W-2 mean REPLI- PLATE CATE COUNTa 1 46,000 2 49,000 47,500 1 46,000 2 33,000 39,500 1 48,000 2 62,000 55,000 1 48,000 2 33,000 40,500 1 ,c 1 50,000 2 90,000 70,000 1 57,000 2 50,000 53,500 1 36,000 2 36,000 36,000 1 35,000 2 58,000 16,500 1 3,800 2 3,500 3,650 T-COLI 5,900 55,000 30,450 6,000 21,000 13,500 32,000 47,000 39,500 20,000 19,000 19,500 9,800 9,800 15,000 23,000 19,000 38,000 23,000 30,500 6,100 4,800 5,400 23,000 18,000 20,500 1,200 100 650 F-STREP 7,400 30,000 18,700 3,100 68,000 35,550 6,200 4,000 5,100 3,500 41,000 22,250 5,800 5,300 26,100 10,600 18,350 124,000 9,200 66,600 7,800 3,700 5,750 1,100 1,140 1,120 860 100 480 R C.SUMMER: STANDARD EPLI- PLATE ATE COUNTa 1 76,000 2 59,000 67,500 1 52,000 2 49,000 50,500 1 42,000 2 32,000 37,000 1 44,000 2 25,000 34,500 1 41,000 2 78,000 59,500 1 34,000 2 34,000 34,000 1 41,000 2 40,000 40,500 1 30,000 2 37,000 33,500 50,000 2 21,000 35,500 JULY 8, 1975 T-COLI 11,000 14,000 12,500 10,000 17,000 13,500 10,000 9,000 9,500 20,000 10,000 15,000 11,000 10,000 10,500 13,000 16,000 14,500 10,000 14,000 12,000 13,000 12,000 12,500 F-STREP 5,500 5,200 5,350 1,000 1,200 1,100 700 300 500 900 1,100 1,000 2,000 1,700 1,850 1,600 1,400 1,500 2,500 2,500 2,500 4,200 4,500 4,350 12,000 1,000 14,000 1,200 13,000 1,100 aValues in no. of colonies/ml.

bspring Replicate 2 was lost in transit.CAsterisk

(*) indicates analysis not done because of lab error.dstation W-1 was dry during summer, fall, and winter sampling.4.1-33 RS-14-051 Enclosure, RAI AQ-lf Response Page 116 of 178 Byron ER-OLS TABLE 4.1-9 (Cont'd)FALL: OCTOBER 7, 1975 STANDARD PLATE STATION REPLICATE COUNTa T-COLI F-STREP R-1e 1 17,000 6,000 300 2 11,000 8,000 400 mean 14,000 7,000 350 R-2 1 15,000 7,000 300 2 13,000 8,000 600 mean 14,000 7,500 450 R-3 1 17,000 7,000 300 2 14,"00 7,000 400 mean 15,500 7,000 350 R-4 1 31,000 6,000 300 2 15,000 6,000 500 mean 23,000 6,000 400 R-5 1 12,000 5,000 300 2 13,000 9,000 400 mean 12,500 7,000 350 S-3 1 20,000 7,000 200 2 22,000 8,000 300 mean 21,000 7,500 250 S-5e 36,000 5,000 200 2 23,000 7,000 200 mean 29,500 6,000 200 S-6 1 18,000 6,000 200 2 13,000 6,000 300 mean 15,500 6,000 250 W-2 1 21,000 7,000 400 2 19,000 5,000 200 mean 20,000 6,000 300 WINTER: FEBRUARY 12, 1976 STANDARD PLATE REPLICATE COUNTa T-COLI F-STREP 1 16,000 4,000*2 28,000 5,000 23,000 4,500 1 21,000 5,000 2 25,000 1,000 23,000 3,000 1 26,000 2,000 2 17,000 6,000 21,500 4,000 1 26,000 4,000 2 31,000 5,000 28,500 4,500 1 23,000 3.000 2 19,000 3,000 21,000 3,000 1 24,000 3,000 2 18,000 2,000 21,000 2,500 1 31,000 3,000 2 33,000 2,000 32,000 2,500 410 220 315 290 210 250 410 210 310 120 180 150 130 110 120 200 130 165 140 220 180 avalues in no. of colonies/ml.

Station inaccesible during winter sampling because of ice.4.1-34 RS-14-051 Enclosure, RAI AQ-lf Response Page 117 of 178 Byron ER-OLS TABLE 4.1-10 FIELD PARAMETERS FOR 1976-1977 SAMPLING SAMPLE Spring 1976 (May 24)Summer 1976 (August 2)Fall 1976 (November 1)Winter 1977 (February 9)STATIONa R-1 R-2 R-3 R-4 R-5 S-3 S-5 S-6 W-2 R-1 R-2 R-3 R-4 R-5 S-3 S-5 S-6 W-2 R-1 R-2 R-3 R-4 R-5 S-3 S-5 S-6 W-2 R-1 R-2 R-3 R-4 R-5 S-3 S-5 S-6 8.1 8.1 8.1 8.1 8.2 8.2 8.1 8.1 8.7 9.0 8.6 8.6 8.7 8.8 8.8 9.0 8.8 8.0 8.1 8.1 8.0 7.0 8.0 7.9 8.2 8.1 8.0 7.9 7.9 7.9 7.9 7.8 7.6 7.8 LIGHT PENETRATION (Secchi) (cm)31.00 38.20 40.00 32.00 44.00 38.00 35.00 26 o0 30.00 26.00 30.50 33.50 27.00 31.00 31.00 23.00+93.00 68.00 74.00 74.00 57.00 77.00 26.00 59.00+137.00 158.00 163. no 154.00 176.00 50.00+130.00 TRANSPARENCY (extinction coeff./cm) 0.008 0.009 0.003 0.004 0.003 0.001 0.003 0.014+0.004 0.009 0.005 0.003 0.017 0.006 0.004 0.009+0.000 0.001 0.001 0.002 0.001 0.001 0.002 0.003+0.001 0.002 0.004 0.008 0.001 0.001+0.005 TURBIDITY (JTU)75 38 64 68 78 68 86 21 23 22 21 21 23 20 22 8 4 4 4 5 5 4 5 5 1 2 2 2 2 2 2 2 4 aStation W-1 was dry during all four winter sampling.sampling programs; Station W-2 was dry during bAsterisk

(*) indicates analysis not done because of field error.CCross (+) indicates analysis not done because water too shallow to measure.4.1-35 RS-14-051 Enclosure, RAI AQ-lf Response Page 118 of 178 Byron ER-OLS TABLE 4.1-11 IN-SITU WATER QUALITY PROFILES FOR 1975-1976 SAMPLING SAMPLE Spring 1976 (May 24)Summer 1976 (August 2)DEPTH TEMPERATURE STATIONa (meters) (* C4 R-1 0.0 1.0 R-2 0.0 1.0 2.0 R-3 0.0 1.0 2.0 2.8 R-4 0.0 1.0 2.0 3.0 R-5 0.0 1.0 2.0 3.0 S-3 0.0 1.0 S-5 0.0 1.0 S-6 0.0 1.0 W-2 0.0 R-1 0.0 1.0 R-2 0.0 1.0 2.0 R-3* 0.0 1.0 2.0 R-4 0.0 1.0 2.0 R-5 0.0 1.0 2.0 3.0 S-3 0.0 1.0 S-5 0.0 0.5 S-6 0.0 1.0 W-2 0.0 16.0 15.5 17.0 17.0 16.8 17.2 17.2 17.3 17.3 17.5 17.3 17.3 17.3 17.4 17.3 17.3 17.3 17.0 17.0 17.8 17.5 17.6 17.6 15.5 24.8 24.8 25.0 25.0 25.0 24.5 24.5 24.5 25.0 25.0 24.5 24.0 24.0 24.0 24.0 25.0 24.8 26.0 23.0 24.8 20.5 21.0 DISSOLV=OXYGEN 0 (mg/liter) 9.60 9.50 9.40 9.20 8.00 10.80 10.70 10.70 10.80 11.40 11.20 11.20 11.00 10.40 10.50 10.40 10.40 9.70 9.50 11.10 10.60 10.30 9.90 9.10 15.00 13.50 14.90 14.20 12.80 14.00 14.00 12.40 13.20 10.60 8.90 11.80 11.80 11.10 10.70 15.00 15.00 14.00 12.80 15.00 9.00 9.40 VELOCITY CONDUCTIVITY (m/aec) .umoL 0.75 0.60 0.40 0.35 0.30 0.45 0.40 0.30 0.30 0.20 0.30 0.30 0.30 0.20 0.25 0.20 0.10 0.20 0.10 0.25 0.20 0.10 0.10 0.20 0.45 0.40 0.20 0.25 0.15 0.20 0.20 0.15 0.28 0.20 0.10 0.15 0.15 0.15 0.10 0.20 0.15 0.15 0.10 0.10 0. Lo 0.30 500 550 470 475 470 465 470 480 480 460 470 470 470 450 475 480 480 490 500 478 600 460 475 485 490 490 498 500 510 475-0-0 495 450 450 470 480 485 490 498 495 490 450 490 450 490 aStation W-1 was dry during all four sampling progrems.bupper limit of detection is 15.00 mg/liter.CSubsruface conductivity not measured because of field error.4.1-36 RS-14-051 Enclosure, RAI AQ-lf Response Page 119 of 178 Byron ER-OLS TABLE 4.1-11 (Cont'd)DTTON EPTH TPEKPERATURE

_______a (meters) (*C SAM4PLE Fall 1976 (November 1)Winter 1977C (February 9)R-1 0.0 1.0 R-2 0.0 1.0 2.0 R-3 0.0 1.0 2.0 R-4 0.0 1.0 2.0 2.5 R-5 0.0 1.0 2.0 2.7 S-3 0.0 1.0 1.5 S-5 0.0 0.5 S-6 0.0 1.0 w-2 0.0 R-1 0.0 1.0 2.0 R-2 0.0 1.0 2.0 R-3 0.0 1.0 2.0 R-4 0.0 1.0 2.0 R-5 0.0 1.0 2.0 3.0 S-3 0.0 0.5 S-5 o.0 S-6 0.0 1.0 6.3 6.0 6.8 6.5 6.5 7.0 7.0 7.0 7.0 7.0 7.0 7.0 6.5 6.3 6.3 6.2 6.6 6.8 6.8 8.0 8.0 7.0 7.0 2.0-1.5-1.5-2.0-1.5-1.5-1.5-1.5-125-1.5-1.5-1.5-1.5-2.0-2.0-2.0-2.0-1.5-1.5-1.5-1.5 DISSOLVE, (mg/liter) 11.80 12.10 13.10 13.40 13.60 12.20 12.20 12.20 12.40 12.50 12.40 12.40 12.30 12.20 12.20 7.80 12.20 12.20 12.20 11.20 11.10 14.20 14.80 13.50 10.50 10.40 10.40 11.10 11.10 11.00 11.10 11.10 11.00 10.90 10.80 10.80 10.70 10.60 10.60 10.50 8.80 8.80 12.50 11.20 11.20 VELOCITY COND0UCTIVITY (rn/See) (ijeho)0.30 0.20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.10 0.20 0.30 0.25 0.10 0.12 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.10 0.05 0.00 0.00 0.00 0.00 0.00 405 410 450 460 460 420 420 420 420 420 425 425 400 405 408 350 410 420 420 430 430 410 410 400 375 380 380 370 370 370 390 395 395 380 385 390 375 380 380 380 385 390 350 340 350 astation W-I was dry during all four sampling programs.bupper limit of detection is 15.00 mg/liter.CStation W-2 was frozen during winter sampling.4.1-37 RS-14-051 Enclosure, RAI AQ-lf Response Page 120 of 178 Byron ER-OLS 0.800..a0 00cW c 0 coo No.4 000 000 000.4..4 .4.. .4.4. .4.4 a .4 M.0.- 44.4 N N .I I .00 OWN ONO NWO 40MW NOW ONW OWO CON WWN 000 0MW MOO ON'fl 0MM 000 000......000 000 0)0.1 000 00900 COO9 000 000 9 000 000 00 WNO OM WO W W OO OO .00 4 O WN 0-4.0.4M OW OM.- WoW CoN .ON O. N 4 i 0 3 44 I.0 0 S am mi ... ..44. 900 -090 0oo NOWo 00.cooo cooo coo 0.0 Co.o 9.0..a 0oo WW W NNN 0440 NWN ONO WNN .4.4000; 000; 000 000 000 o000.. ... ............. 431 .....N. NO"" NMM MM'i 1ý cý000 000 000 r1 C!o AAA00 000 00 0M 0 M99 0MMc:3;&441 000 000 000 000 OWW 000 040 WWW WWW 000 WWW CWW .4.4.4 4044 4'4NN 0MM MOM NNN ONO NON OW'44 al.404 0.14 U-M- 4 -N --MN MN C 0 4.1-38 RS-14-051 Enclosure, RAI AQ-lf Response Page 121 of 178 Byron ER-OLS 4'a)a)C ME.-d.c 44-a)4.I 4.0 0%*0 0 a)0 a= I>=1 Oul 0. 1 In S)fa)a 0 0 a)41 zI 9 0%000 MOO tWO 004 40Ww 000 .40.4 Ca-S 000 a-Ma-oooi ooo I!o o1o oo o o oo oool.9 0 .9m.. .....0 0. 0. N.. .. .005 000% CCC OLCO HOC 000% MOO 000 oa... ...0 , CC ..a ..a ... Co. CC C;C;Cý CCC C C C;CC1 ;4 ;z ; z ;ýz zc CCC CC CCC ICCC COccC C C 00Q% C!CC O C C o!'io!77o 0,00 c; 1ý 1;o;oc 000 0c00 C; ; C AA,- 000p SOA MOM Ca-a-c! ! 1 C! C!999w,, 1! c ,-a! ..9 9,9 9 9 1 om m 1 1! ": 999m Ma-N99 NaN N-N aN -M MN -a a-- aM Ha H- H -H -Ha .N .4-N4 .., I=I ,C.=4.1-39 RS-14-051 Enclosure, RAI AQ-lf Response Page 122 of 178 Mol Byron ER-OLS CO 000 coo aoo .. 000 oo 0oo .0 o9 0M! NOO 0 C! 9 N 9 9! 99 ! N 9-0 99 ,*02 4.E0.1 w00 f0M .I ". NO .. ...1. 000.000 "' 0... .0 .0N 00 .0 ON N 14 1 4 n 61 9 rc!C; °n r: C; *; °.oC!o C!NOO ý ý1 1 140 014 NWO 000 9 0 1!1 NO NOý ýi:C!o1 o~1 U-.I 000 000 0.0..0 ..c!i 9o .- .tn .201 .... ..jx -000 II.1400 NON 14140 NNN NNN 14NN NON I.0 0 S 2 2 01 0 44 S ('INN NNN NN N fINN NNN N4'JNNNN.1 NO NNNNNNNN N NNMNNNNNNONNNNN 441.4041 01 4 0 4 0 I 5 4 01 4 0101 -01 4j ON 010 0 01 N 01 4.1-40 RS-14-051 Enclosure, RAI AQ-lf Response Page 123 of 178 J ON.0I Ci.i Byron ER-OLS... ... ... ... ...ocoo coo ... ... ...°.A00 M.. ... 0 i... .s .. ..4.. -.4.. .4..4 .4.. .4.4. .4.4 0 I C 44 a C U 0 0.o~o ..5;" ti o! 9 i .=.=liII , II ., mI :-N MNN ...O -i ...l ...¢O 1 C. 1.!=,- c;ooo coN° : Co.o ccN cooo Ccc Ccc CCC 9.! CC9 9co coc OSO mom f-in.4 isf-.4 OOC Oem f-CM.4 .4 .4 .4 .4.4 .4 .4 .4 0.4 Scm MSiis c; c;c! 1ýooo cci 000 OCO NON Sof-coo 0mm 055 mmm cmci f--f.40 .4N .40.40.40.40.40 7 17 1'? 1 7.1 7 I 7 1 SgS3S3M3cgo3ci, 4.1-41 RS-14-051 Enclosure, RAI AQ-lf Response Page 124 of 178 Byron ER-OLS TABLE 4.1-16 TRACE METALS ANALYSIS FOR 1976-1977 SAMPLING (All Values in mg/liter)STATION a R-1 mean R-2 mean R-3 mean R-4 mean R-5 mean S-3 mean S-5 mean S-6 mean W-2 mean C1 EPLI-SPRING: MAY 24, 1976 LTE Cd 1 0.000 2 0.000 0.000 1 0.002 2 0.001 0.002 1 0.000 2 0.000 0.000 1 0.002 2 0.001 0.002 1 0.001 2 0.001 0.001 1 0.000 2 0.000 0.000 1 0.000 2 0.000 0.000 1 0.000 2 0.000 0.000 1 0.000 2 0.000 0.000 ZCU 0.006 0.007 0.007 0.013 0.012 0.013 0.006 0.007 0.007 0.008 0.014 0.011 0.009 0.012 0.011 0.012 0.010 0.011 0.010 0.011 0.011 0.005 0.007 0.006 0.012 0.011 0.012 Fe 0.53 0.38 0.46 1.48 1.35 1.41 0.35 0.75 0.55 0.86 0.87 0.86 0.61 0.70 0.65 0.83 0.77 0.80 1.02 0.82 0.92 0.87 0.90 0.88 0.39 0.34 0.37 Cot H, z._.. Pb 0.000 0.0000 0.023 0.01 0.000 0.0000 0.220 0.01 0.000 0.0000 0.121 0.01 0.000 0.0000 0.017 0.00 0.000 0.0000 0.018 0.01 0.000 0.0000 0.017 0.01 0.000 0.0000 0.076 0.01 0.000 0.0000 0.022 0.01 0.000 0.0000 0.049 0.01 0.000 0.0000 0.032 0.01 0.000 0.0000 0.030 0.01 0.000 0.0000 0.031 0.01 0.000 0.0000 0.025 0.00.0.000 0.0000 0.054 0.00 0.000 0.0000 0.039 0.00 0.000 0.0000 0.079 0.02 0.000 0.0000 0.096 0.01 0.000 0.0000 0.087 0.02 0.000 0.0000 0.036 0.00 0.000 0.0000 0.046 0.00 0.000 0.0000 0.041 0.00 0.000 0.0000 0.016 0.01 0.000 0.0000 0.590 0.01 0.000 0.0000 0.303 0.01 0.000 0.0000 0.018 0.00 0.000 0.0000 0.017 0.00 0.000 0.0000 0.017 0.00 Cr 0.006 0.006 0.006 0.011 0.012 0.012 0.008 0.006 0.007 0.006 0.008 0.007 0.009 0.004 0.007 0.012 0.011 0.012 0.005 0.007 0.006 0.003 0.003 0.003 0.004 0.005 0.005 aStation W-1 was dry during spring sampling.4.1-42 RS-14-051 Enclosure, RAI AQ-lf Response Page 125 of 178 Byron ER-OLS TABLE 4.1-16 (Cont'd)STATIONa R-1 mean R-2 mean R-3 mean R-4 mean R-5 mean S-3 mean S-5 mean S-6 mean W-2.mean REPLI-CATE 1 2 1 2 1 2 2 2 1 2 1 2 1 2 2 2 1 2 SUMMER: AUGUST 2, 1976 Cd Cu Fe Co H9 0.001 0.001 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.000 0.001 0.000 0.001 0.000 0.000 0.000 0.011 0.016 0.014 0.008 0.013 0.011 0.006 0.008 0.007 0.010 0.007 0.009 0.009 0.006 0.008 0.006 0.013 0.010 0.012 0.005 0.009 0.018 0.015 0.016 0.006 0.004 0.005 0.97 0.90 0.93 0.79 0.76 0.77 0.98 1.05 1.01 0.80 0.84 0.82 1.13 0.83 0.98 1.03 0.95 0.99 0.90 0.72 0.81 1.05 0.91 0.98 0.61 0.57 0.59 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000 Zn 0.024 0.026 0.025 0.011 0.011 0.011 0.024 0.013 0.018 0.016 0.011 0.014 0.036 0.001 0.018 0.016 0.013 0.015 0.015 0.007 0.011 0.030 0.025 0.027 0.014 0.008 0.011 Pb 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.00 0.01 0.00 0.00 0.00 0.01 0.00 0.01 0.00 0.00 0.00 0.01 0.00 0.01 0.02 0.01 0.02 0.00 0.00 0.00 Cr 0.009 0.008 0.009 0.008 0.002 0.005 0.009 0.009 0.009 0.008 0.007 0.008 0.008 0.012 0.010 0.003 0.002 0.003 0.002 0.002 0.002 0.016 0.009 0.013 0.000 0.000 0.000 aStation W-1 was dry during summer sampling.4.1-43 RS-14-051 Enclosure, RAI AQ-lf Response Page 126 of 178 Byron ER-OLS TABLE 4.1-16 (Cont'd)REPLI- FALL: NOVEMBER 1, 1976 STATIONa CATE Cd CU Fe Co Hq Zn Pb Cr R-1 0.000 07.012 0.22 0.000 0.0000 0.024 0.00 0.003 2 0.000 0.010 0.33 0.000 0.0000 0.029 0.00 0.002 mean 0.000 0.011 0.27 0.000 0.0000 0.026 0.00 0.003 R-2 1 0.000 0.012 0.31 0.000 0.0000 0.020 0.00 0.001 2 0.000 0.012 0.29 0.000 0.0000 0.021 0.00 0.002 mean O.bOO 0.012 0.30 0.000 0.0000 0.020 0.00 0.002 R-3 .1 0.000 0.021 0.29 0.000 0.0000 0.024 0.00 0.004 2 0.000 0.016 0.32 0.000 0.0000 0.022 0.00 0.004 mean 0.000 0.018 0.30 0.000 0.0000 0.023 0.00 0.004 R-4 1 0.000 0.022 0.35 0.000 0.0000 0.022 0.00 0.000 2 0.000 0.011 0.27 0.000 0.0000 0.021 0.00 0.000 mean 0.000 0.016 0.31 0.000 0.0000 0.021 0.00 0.000 R-5 1 0.000 0.015 0.29 0.000 0.0000 0.018 0.00 0.003 2 0.000 0.011 0.26 0.000 0.0000 0.022 0.00 0.001 mean 0.000 0.013 0.27 0.000 0.0000 0.020 0.00 0.002 S-3 1 0.000 0.027 0.28 0.000 0.0000 0.021 0.00 0.004 2 0.000 0.011 0.27 0.000 0.0000 0.020 0.00 0.004 mean 0.000 0.019 0.27 0.000 0.0000 0.020 0.00 0.004 S-5 1 0.000 0.017 0.32 0.000 0.0000 0.022 0.00 0.005 2 0.000 0.020 0.32 0.000 0.0000 0.026 0.00 0.004 mean 0.000 0.018 0.32 0.000 0.0.000 0.024 0.00 0.005 8-6 1 0.000 0.011 0.34 0.000 0.0000 0.014 0.00 0.003 2 0.000 0.010 0.34 0.000 0.0000 0.020 0.00 0.003 mean 0.000 0.011 0.34 0.000 0.0000 0.017 0.00 0.003 W-2 1 0.000 0.006 0.14 0.000 0.0000 0.010 0.00 0.003 2 0.000 0.006 0.09 0.000 0.0000 0.010 0.00 0.000 mean 0.000 0.006 0.11 0.000 0.0000 0.010 0.00 0.002 aStationW-I was dry durinq fall eatuplinq.

4.1-44 RS-14-051 Enclosure, RAI AQ-If Response Page 127 of 178 Byron ER-OLS TABLE 4.1-16 (Cont'd)REPLI-STATIONa CATE WINTER: FEBRUARY 9 1977 R-1 mean R-2 mean R-3 mean R-4 mean R-5 mean S-3 mean S-5 mean S-6 me an Cd Cu 0.000 0.018 0.000 0.038 0.000 0.028 0.000 0.007 0.000 0.019 0.000 0.013 0.000 0.055 0.000 0.019 0.000 0,037 0.000 0.017 0.000 .0.021 0.000 0.019 0.000 0.016 0.000 0.017 0.000 0.016 0.000 0.013 0.000 0.051 0.000 0.320 0.000 0.020 0.000 0.000 0.000 0.010 0.000 0.039 0.000 0.018 0.000 0.028 Fe Co 0.10 0.000 0.15 0.000 0.13 0.000 0.12 0.000 0.10 0.000 0.11 0.000 0.11 0.000 0.11 0.000 0.11 0.000 0.11 0.000 0.12 0.000 0.11 0.000 0.11 0.000 0.10 0.000 0.10 0.000 0.13 0.000 0.14 0.000 0.13 0.000 0.15 0.000 0.14 0.000 0.14 0.000 0.22 0.000 0.22 0.000 0.22 0.000 Hg Zn 0.0000 0.048 0.0000 0.068 0.0000 0.058 0.0000 0.040 0.0000 0.038 0.0000 0.039 0.0000 0.049 0.0000 0.047 0.0000 0.048 0.0000 0.052 0.0000 0.042 0.0000 0.047 0.0000 0.041 0.0000 0.072 0.0000 0.056 0.0000 0.038 0.0000 0.100 0.0000 0.069 0.0000 0.001 0.0000 0.001 0.0000 0.001 0.0000 0.022 0.0000 0.014 0.0000 0.018 0.00 0.02 0.01 0.02 0.03 0.03 0.00 0.03 0.02 0.02 0.01 0.02 0.00 0.03 0.02 0.02 0.03 0.03 0.01 0.03 0.02 0.03 0.03 0.03 0.005 0.004 0.005 0.011 0.006 0.009 0.010 0.007 0.009 0.004 0.010 0.007 0.015 0.013 0.014 0.006 0.007 0.007 0.000 0.000 0.000 0.006 0.002 0.004 PD _ r aStation W-1 was dry and Station W-2 was frozen during winter sampling.4.1-45 RS-14-051 Enclosure, RAI AQ-lf Response Page 128 of 178 Byron ER-OLS TABLE 4.1-17 BACTERIOLOGY ANALYSIS FOR 1976-1977 SAMPLING (All Values in No. of Colonies/100 ml Except Where Noted)SPRING! MAY 24, 1976 sTANBARD SUMMER: AUGUST 2, 1976 STATIONa R-i mean R-2 mean R-3 mean R-4 mean R-5 mean S-3 mean S-5 mean S-6 mean W-2.Mean REPLI- PLATE CATE COUNTr'1 18,000 2 18,000 18,000 1 17,000 2 16,000 16,500 1 25,000 2 26,000 25,500 1 29,000 2 21,000 25,000 1 29,000 2 28,000 28,500 1 32,000 2 34,000 33,000 1 27,000 2 28,000 27,500 1 27,000 2 23,000 25,000 1 33,000 2 34,000 33, 500 T-COLZ 4,700 4,100 4,400.2,800 3,500 3,150 3,500 3,300 3,400 3,600 3,500 3,550 3,800 3,700 3,750 3,700 3,800 3,750 4,200 4,300 4,250 3,800 3,900 3,850 4,200 3,900 4,050 F-STREP 40 35 37 38 36 37 37 55 46 57 60 58 44 38 41 53 51 52 38 39 38 31 37 34 41 38 39 ST4UAKU REPLI- PLAýTE, CATE C 1 22,000 2 26,000 24,000 1 35,000 2 39,000 37,000 1 68,000 2 27,000 47,500 1 32,000 2 37,000 34,500 1 32,000 2 29,000 30,500 1 18,000 2 28,000 23,000 1 26,000 2 18,000 22,000 1 25,000 2 34,000 29,500 1 15,000 2 22,000 18,500 T-COLI 3,300 3,300 3,300 3,100 2,900 3,000 2,800 3,200 3,000 3,100 3,700 3,400 4,000 4,200 4,100 4,000 3,200 3,600 2,200 2,100 2,150 5,200 2,200 3,700 15,000 10,000 12,500 F-STREP 37 41 39 36 27 31 22 31 26 27 32 29 29 32 30 18 10 14 30 24 27 22 33 28 70 170 120 aStation W-1 was dry during all four sampling periods.bValues in no. of colonies/ml.

4.1-46 RS-14-051 Enclosure, RAI AQ-lf Response Page 129 of 178 Byron ER-OLS TABLE 4.1-17 (Cont'd)FALLt NOVEMBER 1, 1976 STANDARD PLATEb STATIONa REPLICATE COUNT T-COLI F-STREP WINTER: FEBRUARY 9, 1977 STANDARD PLATEb REPLicAT COUNT T-COLI F-STREP R-1 mean R-2 mean R-3 mean R-4 mean R-5 mean S-3 mean S-5 mean S-6 mean W-2 c mean 1 57,000 400 .320 2 98,000 900 240 77,500 650 280 1 30,000 500 180 2 51,000 400 210..40,500 450 195 1 43,000 1,200 280 2 28,000 200 100 35,500 700 190 1 52,000 900 500 2 38,000 600 300 45,000 700 400 1 72,000 1,200 140 2 94,000 1,100 200 83,000 1,150 170 1 75,000 1,500 100 2 26,000 600 240 50,500 1,050 170 1 31,000 1,200 100 2 50,000 800 200 40,500 1,000 150 1 87,000 1,300 210 2 89,000 1,400 300 88,000 1,350 255 1 36,000 2,100 200 2 80,000 1,700 100 58,000 1,900 150 1 8,900 2,300 2 13,200 1,960 11,050 2,130 1 6,340 1,240 2 15,200 1,340 10,770 1,290 1 7,500 1,740 2 4,200 .1,540 5,850 1,640 1 8,200 1,920 2 7,400 2,100 7,800 2,010 1 7,700 1,420 2 2,980 1,680 5,340. 1,550 1 6,800 320 2 1,190 380 3,995 3.50 1 7,200 1,760 2 6,100 1,680 6,650 1,720 1 5,700 1,180 2 6,600 720 6,150 950 115 130 122 35 15 25 10 35 23 20 35 28 35 20 28 10 10*10 25 45.35 15 30 23 a Station W-I was dry during all four sampling periods.bvalues in no. of colonies/ml.

CStation W-2 was frozen during winter sampling.4.1-47 RS-14-051 Enclosure, RAI AQ-1f Response Page 130 of 178 :BYrn ER-OLS 4)C0..0*4J M V0 00 41 )UU-z-.-.- 4) aC 0 4 10 9 4Je m o" H J o H 4 0r,a % 0C DaC41 13 ~4-00 N. &440 0v0 0C 00r -4C o Li Ci tr w M4 H 0.m -0 £~ao-a~r~

e4o~rA N N4 H NNO4C CA(£0~4 U) ~ G.HD Ci Q DC '.0 m V~~.)4 W.VC..r-4 C' C4 4( 0 0 >0 4 to9 on c0 0% 0.aqin Ha HA Ha --n 4-4 U H ro.' ~ r4.1-48U RS-14-051 Enclosure, RAI AQ-lf Response Page 131 of 178 L CREEK ROCK RIVE REEK EAF OODLAND\CREEK 0 REEK U1~F1 iimii II.', LEGEND CREEK 4 R RIVER TRANSECT S STREAM STATION W POOL STATION 0 SEINING LOCATION 2) BYRON STATION w MILS OREGON BYRON NUCLEAR GENERATING STATION UNITS I & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE FIGURE 4.1-5 AQUATIC SAMPLING SITES NEAR THE BYRON STATION RS-14-051 Enclosure, RAI AQ-lf Response Page 132 of 178 Byron ER-OLS CHiAPTER 5.0 -ENVIRONMENTAL EFFECTS OF STATION OPERATION TABLE OF CONTENTS PAGE 5.1 EFFECTS OF OPERATION OF HEAT DISSIPATION SYSTEM 5.1-1 5.1.1 Effluent Limitations and Water Quality Standards 5.1-1 5.1.2 Physical Effects 5.1-4 5.1.2.1 The Environmental Report-Construction Permit Stage Model Study 5.1-4 5.1.2.2 The Iowa Institute of Hydraulic Research Paily Model 5.1-5 5.1.3 Biological Effects 5.1-6 5.1.3.1 Effects of Released Heat on the Rock River 5.1-7 5.1.3.2 Effects of Entrapment and Impingment of Juvenile and Adult Fish on the Rock River 5.1-8 5.1.3.3 Entrainment Effects on the Rock River 5.1-9 5.1.3.4 Effects of Reactor Shutdown on the Rock River 5.1-9 5.1.3.5 Terrestrial Effects of Operation of Heat Dissipation System 5.1-9 5.1.4 Effects of Heat Dissipation Facilities 5.1-10 5.1.4.1 Impacts of Visible Plume 5.1-11 5.1.4.1.1 Natural Draft Cooling Towers 5.1-11 5.1.4.1.1.1 Temporal and Spatial Distribution of Visible Plumes 5.1-11 5.1.4.1.1.2 Visible Plume Impact Assessment 5.1-12 5.1.4.1.2 Mechanical Draft Cooling Towers 5.1-13 5.1.4.2 Impacts of Drift 5.1-13 5.1.4.2.1 Natural Draft Cooling Towers 5.1-13 5.1.4.2.1.1 Solids Deposition 5.1-14 5.1.4.2.1.2 Drift Precipitation 5.1-15 5.1.4.2.1.3 Airborne Solids 5.1-15 5.1.4.2.2 Mechanical Draft Cooling Towers 5.1-16 5.1.4.3 Other Cooling Tower Effects 5.1-16 5.1.4.3.1 Influences on Climate 5.1-16 5.1.4.3.2 Icing and Fog 5.1-17 5.1.4.3.3 Interactions with Atmospheric Constituents 5.1-17 5.1A PLUME MODELS 5.1A-i 5.1B ANALYSIS OF THERMAL PLUME FOR THE BLOWDOWN DISCHARGE FROM THE BYRON POWER STATION 5.1B-i 5.1C EFFECTS OF OUTFALL DESIGN ON THE THERMAL IMPACT OF BYRON STATION BLOWDOWN DISCHARGE 5.1C-i 5.0-i RS-14-051 Enclosure, RAI AQ-lf Response Page 133 of 178 Byron ER-OLS TABLE OF CONTENTS (Cont'd)PAGE 5.2 RADIOLOGICAL IMPACT FROM ROUTINE OPERATION 5.2-1 5.2.1 Exposure Pathways 5.2-1 5.2.1.1 Exposure Pathways to Biota Other Than Man 5.2-1 5.2.1.1.1 Terrestrial Pathways 5.2-1 5.2.1.1.2 Aquatic Pathways 5.2-1 5.2.1.2 Exposure Pathways to Man 5.2-2 5.2.1.2.1 Terrestrial Pathways 5.2-2 5.2.1.2.2 Aquatic Pathways 5.2-3 5.2.2 Radioactivity in Environment 5.2-4 5.2.2.1 Surface Water Models 5.2-4 5.2.2.2 Groundwater Models 5.2-5 5.2.2.3 Gaseous Models 5.2-5 5.2.3 Dose Rate Estimates for Biota Other Than Man 5.2-5 5.2.3.1 Gaseous Effluents 5.2-5 5.2.3.2 Liquid Effluents 5.2-5 5.2.3.3 Dose Effects on Biota 5.2-7 5.2.4 Dose Rate Estimates for Man 5.2-7 5.2.4.1 Liquid Pathways 5';2-7 5.2.4.2 Gaseous Pathways 5.2-8 5.2.4.3 Direct Radiation from Facility 5.2-8 5.2.4.4 Annual Population Doses 5.2-9 5.2.5 Summary of Annual Radiation Doses 5.2-9 5.2A EXAMPLES OF DOSE CALCULATIONAL METHODS 5.2A-i 5.3 EFFECTS OF CHEMICAL AND BIOCIDE DISCHARGES 5.3-1 5.4 EFFECTS OF SANITARY WASTE DISCHARGES 5.4-1 5.5 EFFECTS OF OPERATION AND MAINTENANCE OF THE TRANSMISSION SYSTEMS 5.5-1 5.5.1 Maintenance of Transmission Right-of-Way 5.5-1 5.5.2 Periodic Transmission Line Inspection Programs 5.5-1 5.5.3 Operational Aspects 5.5-1 5.6 OTHER EFFECTS 5.6-1 5.6.1 Introduction 5.6-1 5.6.2 Approach 5.6-1 5.6.3 Procedures 5.6-1 5.6.4 Noise Effects 5.6-2 5.6.4.1 Illinois Environmental Protection Agency 5.6-2 5.6.4.2 U.S. Environmental Protection Agency 5.6-2 5.6.4.3 Department of Housing and Urban Development 5.6-2 5. 0-ii RS-14-051 Enclosure, RAI AQ-lf Response Page 134 of 178 Byron ER-OLS TABLE OF CONTENTS (Cont'd)PAGE 5.6.4.4 Preoperational Ambient Levels 5.6-2 5.6.5 Conclusion 5.6-3 5.7 RESOURCES COMMITTED 5.7-1 5.7.1 Resources Comitted During Plant Lifetime 5.7-1 5.7.2 Irretrievable Committments of Resources 5.7-2 5.8 DECOMMISSIONING AND DISMANTLING 5.8-1 5. 0-iii RS-14-051 Enclosure, RAI AQ-lf Response Page 135 of 178 Byron ER-OLS CHAPTER 5.0 -ENVIRONMENTAL EFFECTS OF STATION OPERATION LIST OF TABLES NUMBER TITLE PAGE 5.1-1 Isotherm Areas Under Monthly Average Conditions at the Byron Station 5.1-19 5.1-2 Isotherm Areas for Case 1 Extreme Condition 5.1-21 5.1-3 Isotherm Areas for Case 2 Extreme Condition 5.1-22 5.1-4 Isotherm Areas for Case 3 Extreme Condition 5.1-23 5.1-5 Comparison of Excess 50 F Plume Sizes 5.1-24 5.1-6 Natural Draft Cooling Tower Design Specifications and Operating Parameters 5.1-25 5.1-7 Mechanical Draft Cooling Tower Design Specifications and Operating Parameters 5.1-26 5.1-8 Frequency Distribution of Visible Plume Length for the Byron Station's Two Natural Draft Cooling Towers Operating at.Full Load 5.1-27 5.1-9 Frequency Distribution of Visible Plume Height for the Byron Station's Two Natural Draft Towers Operating at Full Load 5.1-28 5.1-10 Drift Droplet Size Distribution for the Byron Station's Natural Draft Cooling Towers 5.1-29 5.2-1 Concentration of Radionuclides in the Discharge and the Corresponding Bioaccumulation Factors 5.2-10 5.2-2 Annual Average Site Boundary Doses 5.2-11 5.2-3 Dispersion Factors (x/Q) and Deposition Rates for Points of Interest 5.2-12 5.2-4 Expected Individual Doses from Gaseous Effluents 5.2-13 5.2-5 Assumptions Used to Calculate Radio-nuclide Concentrations and Doses to Biota Other Than Man 5.2-14 5.2-6 Radionuclide Concentrations and Internal Data Rates to Biota Other Than Man 5.2-15 5.2-7 Pathways Doses from Liquid Effluents 5.2-16 5.2-8 Consumption Factors for the Maximum Exposed Individual 5.2-17 5.2-9 Annual Offsite Direct Doses to Indivi-duals Due to Contained Radiation Sources 5.2-18 5.2-10 Estimated Doses to the Population Within 50 Miles of the Station from Releases of Gaseous Effluents 5.2-19 5.2-11 Estimates of the Annual Whole-Body

5. O-iv RS-14-051 Enclosure, RAI AQ-lf Response Page 136 of 178 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 LIST OF TABLES (Cont'd)NUMBER TITLE PAGE Radiation Dose to the Population Within 50 Miles of the Byron Station 5.2-20 5.3-1 Estimated Average Blowdown Analysis 5.3-5 5.3-2 Average Chemical Discharges of the Byron Station 5.3-6 5.3-3 Expected Maximum Chemical Discharges of the Byron Station 5.3-7 5.6-1 Predicted Noise Levels Due to Normal Continuous Operation 5.6-4 5.6-2 Predicted Noise Levels Due to Relief Valves Operation 5.6-5 5.6-3 Comparison of Preoperational and Plant-Operational Continuous Noise Levels with U.S. EPA Guidelines 5.6-6 5.6-4 Comparison of Preoperational and Plant-Operational Continuous Noise Levels with HUD Guidelines 5.6-7 5.7-1 Summary of Environmental Considera-tions for Uranium Fuel Cycle Normalized to Model-LWR Annual Fuel Requirement 5.7-3 5.8-1 Estimates of the Costs of the Primary Decommissioning Alternatives for Each of the Byron.Station Units 5.8-3 5.0-v RS-14-051 Enclosure, RAI AQ-lf Response Page 137 of 178 Byron ER-OLS CHAPTER 5.0 -ENVIRONMENTAL EFFECTS OF STATION OPERATION LIST OF FIGURES NUMBER TITLE 5.1-1 Surface Thermal Isotherms in Rock River Under Case 3 Extreme Conditions 5.1-2 Spring Visible Plume Isopleths 5.1-3 Summer Visible Plume Isopleths 5.1-4 Fall Visible Plume Isopleths 5.1-5 Winter Visible Plume Isopleths 5.1-6 Annual Average Drift Deposition Isopleths 5.2-1 Possible Radiation Exposure Pathways for Local Flora and Local and Migratory Fauna 5.2-2 Possible Radiation Exposure Pathways to Persons 5.6-1 Noise Prediction Locations 5.6-2 Noise Levels at Point 1.5.6-3 Noise Levels at Point 2 5.6-4 Noise Levels at Point 3 5.6-5 Noise Levels at Point 4 5. 0-vi RS-14-051 Enclosure, RAI AQ-1f Response Page 138 of 178 Byron ER-OLS examined the two worst cases of the Paily report: 1500 cfs and 2200 cfs with an initial excess temperature of 39.30 F and 44.70 F, respectively.

An examination of the two reports reveals a difference between the areas contained within the excess 50 F isotherms for the side canal discharge.

The difference is caused by the phenomenon known as shore attachment.

Shore attachment is when the maximum water temperatures of the discharge plume are found along the bank of a stream instead of at some distance offshore and when the flow within the discharge plume is fully mixed (no stratification) both with respect to thermal and density factors.The result, shore attachment, is that no diffusion or mixing with cooler water occurs on the bank side or along the bottom.Because of this reduced mixing, a greater area exists within the same excess isotherms than exists in the non-shore-attached jets examined by Paily (1975a).The difference in areas within any excess isotherm reported in the Paily and Giaquinta reports may be considered a result of shore attachment assumptions versus non-shore attachment assumptions..

The Giaquinta report gives the greatest area that is possible and the Paily report yields the minimum. At a river flow of 1500 cfs and discharge temperature of 39.30 F above ambient, the area contained within the excess 50 F isotherm would range from 0.3 to 6.6 acres and the maximum width would range from 90 to 160 feet; for a river flow of 2200 cfs and discharge temperature of 44.70 F above ambient would range from 2.5 to 4.2 acres and the maximum width from 175 to 140 feet. A comparison of the excess 50 F plume sizes for the extreme conditon flows are given in Table 5.1-5.The academic study of shore attachment is relatively new, and was therefore not studied in the original Paily report (Appendix 5.1B). The distinctive behavior of a jet of water undergoing shore attachment was recognized and developed concurrently and more or less independently by the Massachusetts Institute of Technology (Jirka et al. 1975) and IIHR (Pailly 1975b), and field work and application of those data was accomplished by Sayre during the latter part of 1975, after the work of the Paily report (Appendix 5.1B) had been accomplished.

5.1.3 Biological

Effects This subsection describes the predicted thermal impact of the cooling tower blowdown on the Rock River biota, the effect of removing a portion of the river's aquatic organisms in the makeup water, and the potential for entrapment and impingement of fish on the traveling screens at the river intake structure.

For a description of the intake structure's operating characteristics, see Section 3.4.5.1-6 RS-14-051 Enclosure, RAI AQ-lf Response Page 139 of 178 Byron ER-OLS 5.1.3.1 Effects of Released Heat on the Rock River The thermal discharge to the Rock River from the Byron Station will result in a thermal plume that will be well within the Illinois thermal limits (see Subsection 5.1.2) and therefore should not adversely affect biota outside the mixing zone. The 50 isotherms under extreme weather and river water conditions have been calculated (see Tables 5.1-2, 5.1-3, and 5.1-4). For Case 1, which describes conditons of minimum river flow, data is presented in Table 5.1-2 of this Environmental Report. For Case 2, which encompases maximum water temperatures, the. worst case 50 F isotherm (910 F) will occur during July/August and will cover an area of 0.06 acres, when water temperature is 860 F and discharge temperature is 93.50 F (see Table 5.1-3). For Case 3, low river flows, high wet bulb temperatures, and low river water temperatures are assumed. The maximum difference between river water and blowdown temperatures (44.70 F) will occur during March/April (see Table 5.1-4). The predicted 50 isotherm, which is 370 F when minimum water temperature is 320 F, will cover an area of 23 acres, which is less than the approximately 26 acre mixing zone allowed in Illinois.Based on the data presented in Subsection 5.1.2 of this ER, it is concluded that the majority of plankton species will be unaffected by the thermal plume. Those killed by the temperature increase will become part of the organic material available in the food web. Furthermore, only a short period of time would be required to reestablish normal plankton population numbers and diversity below the outfall.Projected temperatures for the plume areas (see Subsection 5.1.2)should not adversely affect macroinvertebrate productivity.

Chironomids, which are the most common benthic insects found in the biological studies (see Subsection 2.2.1.9), are tolerant to elevated temperatures.

Gammon (1969) reported that the number of chironomids found in samplers placed in effluents with temperatures ranging from 850 F to 950 F were not reduced in comparison to control areas. Coutant (1962) reported that chironomids of a riffle of the Delaware River, which were exposed to heated effluents from a steam electric generating plant, were tolerant to temperatures exceeding those projected for Byron Station. Coutant (1962) found chironomids survived temperatures in excess of 930 F, and Walche (1948) reported that some members of the most common invertebrates in benthos samples should not be adversely affected by elevated temperatures at the outfall.Markowski (1959) found oligochaetes living and reproducing in the effluents of power plants with discharge temperatures in excess of 850 F. Species of Hexagenia have been found on artificial substrates at the mouth of the discharge canal from the Dresden Nuclear Power Station (NALCO Environmental Science 1976).The thermal effects of blowdown discharge will not adversely affect Rock River fishes (Byron Station ER-CPS subsection 5.1.3)because plume temperatures will remain within the thermal 5.1-7 RS-14-051 Enclosure, RAI AQ-lf Response Page 140 of 178 Byron ER-OLS tolerance limits of most Rock River species and the thermal plume is restricted to a minor width and area of the river. Even if lethal temperatures should occur in a limited area of the discharge plume, fish mortalities are unlikely since fish ordinarily avoid lethal temperatures and seek preferred temperatures that are optimum for various physiological or ecological processes.

5.1.3.2 Effects of Entrapment and Impingement of Juvenile and Adult Fish on the Rock River Byron Station's makeup water intake on the Rock River is designed as a shoreline structure without a canal or other physical features that would attract juvenile or adult fish.The normal operational makeup rate will range from 61 to 98 cfs;it is predicted, however, that during a small portion of the station's operating time a makeup rate of 107 cfs will be required.

Approach velocities will range from 0.48 to 0.55 feet per second (fps) depending upon river levels, at the maximum makeup rate of 107 cfs.It has been calculated that at the unusual intake flow of 107 cfs (one half of which passes through each of the two screens), the velocity of the water passing through the traveling screens ranges from 1.52 fps to 1.74 fps depending on river level.At these approach velocities (0.48 to 0.55 fps) most of the healthier adult fish found in the Rock River are expected to be able to swim away from the intake and avoid impingement (Schuler 1967).Since swimming speed generally increases with size within a species, more small than large fish are expected to be impinged.Temperatures as well as size influence impingement frequency.

As water cools down during fall and early winter, increased impingement losses may occur because cclder water temperatures reduce swimming speeds (Hocutt 1970).There will be no heated water, or other discharges, to attract fish around the intake. No deicing operation in the winter is required, and no deicing facilities have been installed.

There are no provisions for the addition of biocides to the makeup water. The blowdown structure is located approximately 600 feet downstream of the intake site. The distance between the makeup and blowdown structures should ensure that recirculation of discharge water into the intake does not occur.The engineering design and operation of the river intake structure for the Byron Station ensures that there will be no significant entrapment of adult fish at the intake. What entrapment occurs will have no measurable influence on fish population dynamics in the Rock River.5.1-8 RS-14-051 Enclosure, RAI AQ-lf Response Page 141 of 179 Byron ER-OLS 5.1.3.3 Entrainment Effects on the Rock River At the station intake, the average Rock River flow is 4580 cfs.Planktonic organisms will be entrained in numbers proportional to their frequency of occurrence in the volume of makeup water.During the summer this maximum loss is about 2% of the plankton passing the plant intake under average flow and 7% under 7-day 10-year low flow conditions.

As indicated in the FYES (see Subsection 5.4.2.1), since the generation time of plankters is short (hours to days) and the proportion lost is small, the plankton productivity in the river should recover rapidly.The spawning and egg characteristics of Rock River fishes indicate that the eggs of the majority of the species of interest (game and commercial) should be only slightly affected by entrainment because'they are not normally drifting in the current. Many of the game species have adhesive eggs that may be demersal or found in nests. Adhesive and/or demersal eggs found floating in the water column are usually there as a result of the river current or some other physical force sweeping them away from their substrate.

Of these eggs,., those that are fertilized may experienced high mortalities because they are not in their normal environment.

Many larvae of the species involved do occur in the water column, although often they are still confined to backwater and headwater streams and do not occur in significant numbers in the mainstream of the river. Furthermore, under natural conditions, only a fraction of the larvae that hatch survive, and it is highly questionable that the numbers entrained could have any measurable impact on the fish population.

5.1.3.4 Effects of Reactor Shutdown on the Rock River There would be a potential for a lethal effect due to thermal shock if a total reactor shutdown were to occur during winter periods when the thermal differential with the river water is high. The normal refueling shutdown schedule is once per year per unit, when the unit has operated continuously at a 100% load factor, with only one reactor shut down at a time. If the associated tower were shut down* the volume of heated water reaching the river would be reduced by about half with a concomitant reduction in plume size. Such a reduction would probably concentrate the fish as they follow the forming gradient to their acclimation levels, but it is likely that they would reacclimate to a lower temperature when the population density got too high. Normal reactor shutdown usually proceeds at a pace that would allow fish to acclimatize.

5.1.3 Terrestrial

Effects of Operation of Heat Dissipation System The potential for possible adverse effects of cooling tower salt draft deposition upon the biota near the Byron Station has resulted in a modification to the terrestrial monitoring program.Infrared aerial photographs are currently being taken to ensure 5.1-9 RS-14-051 Enclosure, RAI AQ-lf Response Page 142 of 179 Byron ER-OLS 5.2 RADIOLOGICAL IMPACT FROM ROUTINE OPERATION During normal operation of the Byron Nuclear Generating Station Units I & 2 (Byron Station), very small amounts of liquid and gaseous radioactive effluents will be released into the environment.

This section discusses possible radiological effects of thesereleases on persons and biota other than man.5.2.1 Exposure Pathways Radioactive effluents from the Byron Station are a potential source of radiation exposure.

The possible radiation exposure pathways to biota other than man are identified in subsection 5.2.1.1. Radiation exposure pathways for persons are discussed in Subsection 5.2.1.2.5.2.1.1 Exposure Pathways to Biota Other Than Man The possible radiation exposure pathways for species of local flora and local and migratory fauna are shown in Figure 5.2-1.These exposure pathways are evaluated in this Subsection.

5.2.1.1.1 Terrestrial Pathways Radioactive effluents from the Byron Station may enter the terrestrial environment in the form of liquid, gaseous, or particulate material.

Terrestrial animals in the vicinity of the Byron Station site may receive an external radiation dose as the result of submersion in air containing beta- and gamma-emitting radionuclides.

The exposure rate will be approximately equal for all organisms exposed to the radionuclides in air. Inhalation of the gaseous effluent cloud will also result in a dose to terrestrial animals. The most critical organ for exposure in this latter pathway is the thyroid, which is capable of concentrating radioiodines present in air. Direct radiation from contaminated surfaces, another possible exposure route, includes direct exposure from radionuclides deposited on vegetation, soil, and exposed surfaces.

This pathway, however, is less important than pathways in which uptake and concentration can occur. Other important exposure pathways include exposure to contaminated shoreline sediments and ingestion of foods contaminated by irrigation with water containing diluted effluents.

5.2.1.1.2 Aquatic Pathways Small amounts of liquid radioactive effluent will be discharged into the Rock River with the cooling tower blowdown.

The liquid releases will be diluted by the blowdown, and the radionuclides will either be dissolved or become suspended in the water. Biota found in this area or those that reside in this area during migratory movements may be exposed to the radiation emitted by these radionuclides.

5.2-1 RS-14-051 Enclosure, RAI AQ-If Response Page 143 of 178 Byron ER-OLS Radionuclides released to the river may be adsorbed on suspended particles and bottom sediment.

The suspended matter will settle to the bottom of the river, with the point of settling and the time of settling depending on the size of the particles and the flow rate of the river. As a result, radionuclides may accumulate in the sediment in the vicinity of the Byron Station discharge for the life of the station. Benthic organisms that live on or in this sediment could be exposed to the emitted radiation.

In addition, gamma radiation from such sedimentary deposits, which accumulate near the bank and have only a shallow covering of water, may result in shoreline exposures of terrestrial organisms.

Some aquatic organisms may accumulate radionuclides in their body tissues as a result of diet and direct absorption from river water. The radionuclides may then be transferred to birds or other terrestrial organisms that derive all or part of their diet fkom the river. Transfer in the terrestrial food chain is considered to be through successive trophic levels.5.2.1.2 Exposure Pathways to Man The various possible pathways of radiation exposure to persons are shown in Figure 5.2-2.5.2.1.2.1 Terrestrial Pathways Radioactive effluents could be distributed in the terrestrial environment as discussed in Subsection 5.2.1.1.1.

The critical terrestrial pathways for persons are listed as follows: a. submersion in a cloud of gaseous effluents;

b. inhalation of gaseous effluents;

c. direct radiation exposure from radionuclide deposition on vegetation, soil, and exposed surfaces;and d. ingestion of contaminated food chain components.

Some of the most important gaseous effluents include radioactive noble gases and halogens released during normal operation of the Byron Station. These effluents would attach themselves to particles in the air and deposit on vegetation, on the ground, or on a body of water. These radioactive materials could then be assimilated by land plants or animals. Human consumption of these plants or animals would result in radiation exposure to the individual.

Because a milk cow concentrates iodine in its milk and the human thyroid can also concentrate iodine, the air-grass-cow-milk pathway can be used to evaluate the thyroid dose from deposition of halogens.5.2-2 RS-14-051 Enclosure, RAI AQ-lf Response Page 144 of 178 Byron ER-OLS CHAPTER 6.0- EFFLUENT AND ENVIRONMENTAL MEASUREMENTS AND MONITORING PROGRAMS TABLE OF CONTENTS PAGE 6.1 APPLICANT'S PREOPERATIONAL MONITORING PROGRAMS 6.1-1 6.1.1 Surface Waters 6.1-1 6.1.1.1 Physical and Chemical Parameters 6.1-2 6.1.1.1.1 Baseline Program 6.1-2 6.1.1.1.2 Construction Stage Monitoring Program 6.1-4 6.1.1.2 Ecological Parameters 6.1-4 6.1.1.2.1 Baseline Program 6.1-5 6.1.1.2.2 Construction Stage Monitoring Program 6.1-12 6.1.2 Groundwater 6.1-21 6.1.2.1 Physical and Chemical Parameters 6.1-21 6.1.2.2 Models 6.1-23 6.1.3 Air 6.1-23 6.1.3.1 Meteorology 6.1-23 6.1.3.1.1 Instrumentation 6.1-24 6.1.3.1.2 Equipment Maintenance and Calibration Procedures 6.1-25 6.1.3.1.4 Regional Data Sources 6.1-28 6.1.3.2 Models 6.1-28 6.1.3.2.1 Short-Term (Accident)

Diffusion Estimates 6.1-28 6.1.3.2.2 Long-Term (Routine)

Diffusion Estimates 6.1-29 6.1.3.2.2.1 Joint Frequency Distribution of Wind Direction, Wind Speed, and Stability 6.1-30 6.1.3.2.2.2 Effective Release Height 6.1-33 6.1.3.3 Cooling System Impact 6.1-36 6.1.3.3.1 Visible Plume 6.1-36 6.1.3.3.1.1 Visible Plume Model 6.1-36 6.1.3.3.1.2 Visible Plume Model Validity 6.1-44.6.1.3.3.2 Drift Modeling 6.1-45 6.1.4 Land 6.1-46 6.1.4.1 Geology and Soils 6.1-46 6.1.4.1.1 Office Studies 6.1-47 6.1.4.1.2 Field Studies 6.1-47 6.1.4.1.3 Laboratory Studies 6.1-48 6.1.4.2 Land Use and Demographic Surveys 6.1-48 6.1.4.2.1 Land Use Surveys 6.1-48 6.1.4.2.2 Demographic Surveys 6.1-48 6.1.4.3 Ecological Parameters 6.1-49 6.1.4.3.1 Baseline Program 6.1-49 6.1.4.3.1.1 Flora 6.1-50 6.1.4.3.1.2 Fauna 6.1-51 6.1.4.3.2 Construction Stage Monitoring Programs 6.1-52 6.1.4.3.2.1 Byron Station Ecological Monitoring Program for 1974 6.1-53 6.1.4.3.2.1.1 Flora 6.1-53 6.1.4.3.2.1.2 Fauna 6.1-53 6.0-i RS-14-051 Enclosure, RAI AQ-lf Response Page 145 of 178 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 TABLE OF CONTENTS (Cont'd)PAGE 6.1.4.3.2.2 Construction and Preoperational Terres-trial Ecological Monitoring Program for 1975-1976 6.1-54 6.1.4.3.2.2.1 Flora 6.1-54 6.1.4.3.2.2.2 Fauna 6.1-57 6.1.4.3.2.2.3 Salt Drift 6.1-60 6.1.4.3.2.3 Construction and Preoperational Terres-trial Ecological Monitoring Program for 1976-1977 6.1-60 6.1.4.3.2.3.1 Flora 6.1-60 6.1.4.3.2.3.2 Fauna 6.1-61 6.1.4.3.2.3.3 Salt Drift 6.1-62 6.1.4.3.2.4 Preoperational Terrestrial Ecological Monitoring 6.1-62 6.1.5 Radiological Monitoring 6.1-63 6.1.5.1 Sampling Media, Locations, and Frequency 6.1-63 6.1.5.2 Data Analysis, Analytical Sensitivity and and Data Presentation 6.1-64 6.1.5.2.1 Air Samples 6.1-64 6.1.5.2.2 Water Samples 6.1-65 6.1.5.2.3 Sediment 6.1-65 6.1.5.2.4 Fish 6.1-65 6.1.5.2.5 Milk 6.1-65 6.1.5.2.6 Vegetation 6.1-65a 6.1.5.2.7 External Gamma Exposure 6.1-65a 6.1.5.3 Program Statistical Sensitivity 6.1-65a 6.1.5.4 Background Radiological Characteristics 6.1-66 6.1.5.4.1 General 6.1-66 6.1.5.4.2 Radioactivity in Air 6.1-67 6.1.5.4.3 External Gamma Radiation 6.1-68 6.1.5.4.4 Radioactivity in the Aquatic Environment 6.1-68 6.1.5.4.5 Radioactivity in Terrestrial Products 6.1-68 6.1.5.5 Summary 6.1-69 6.1A FORMULAS USED IN ANALYSES OF ALGAL DATA 6.1-i 6.2 APPPLICANT'S PROPOSED OPERATIONAL MONITORING PROGRAMS 6.2-1 6.2.1 Aquatic Monitoring Program 6.2-1 6.2.2 Terrestrial Monitoring Program 6.2-1 6.2.3 Radiological Monitoring Program 6.2-1 6.2.4 Meteorological Monitoring Program 6.2-1 6.3 RELATED ENVIRONMENTAL MEASUREMENT AND MONI-TORING PROGRAMS 6.3-1 6.0-ii RS-14-051 Enclosure, RAI AQ-lf Response Page 146 of 178 Byron ER-OLS TABLE OF CONTENTS .(Cont'd)PAGE 6.4 PREOPERATIONAL ENVIRONMENTAL RADIOLOGICAL MONITORING DATA 6.4-1 6. 0-ili RS-14-051 Enclosure, RAI AQ-lf Response Page 147 of 178 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 CHAPTER 6.0 -EFFLUENT AND ENVIRONMENTAL MEASUREMENTS AND MONITORING PROGRAMS LIST OF TABLES NUMBER TITLE PAGE 6.1-1 Summary of the 1973-1974 Aquatic Moni-toring Program 6.1-70 6.1-2 Summary of Chemical and Physical Para-meters Monitored During Second Year (1973-1974)

Aquatic Monitoring Program 6.1-71 6.1-3 Summary of Water Chemistry Methods 6.1-72 6.1-4 Summary of Aquatic Biology Preoperational Monitoring Program after 1974 at Byron Station 6.1-73 6.1-5 Summary of Terrestrial Ecology Baseline Monitoring Program 6.1-74 6.1-6 Schedule of Spring-Winter Terrestrial Sampling for 1975-1976 6.1-75 6.1-7 Schedule of Spring-Winter Terrestrial Sampling for 1976-1977 6.1-76 6.1-7A Groundwater Monitorint Action Levels by Well 6.1-76a 6.1-8 Preoperational Radiological Sampling Program 6.1-77 6.1-9 Practical Lower Limits of Detection (LLD) for Standard Environmental Radio-logical Monitoring Program 6.1-78 6.1-10 Expected Byron Background Radiation Levels Based on Ouad Cities Data 6.1-79 6.2-1 Standard Radiological Monitoring Pro- f gram 6.2-2 6.3-1 Fish Collected by the Illinois Depart-ment of Conservation from the Rock River Near the Byron Station Site in 1973, 1974, 1976, and 1977 6.3-2 6. 0-iv RS-14-051 Enclosure, RAI AQ-lf Response Page 148 of 178 Byron ER-OLS CHAPTER 6.0 -EFFLUENT AND ENVIRONMENTAL MEASUREMENTS AND MONITORING PROGRAMS LIST OF FIGURES NUMBER TITLE 6.1-1 Locations of Aquatic Sampling Stations 6.1-2 Sample Creel Census Questionnaire 6.1-3 Creel Census Sampling Locations 6.1-4 Baseline Terrestrial Sampling Locations 6.1-5 1974 Vegetation Sampling Areas 6.1-6 1974 Mammal Sampling Locations 6. 1-7 1974 Bird Sampling Quadrats 6.1-8 Year 1 Terrestrial Sampling Locations 6.1-9 Year 2 Terrestrial Sampling Locations 6.1-10 Radiological Monitoring Sampling Locations 6. 0-v RS-14-051 Enclosure, RAI AQ-lf Response Page 149 of 178 Byron ER-OLS CHAPTER 6.0 -EFFLUENT AND ENVIRONMENTAL MEASUREMENTS AND MONITORING PROGRAMS 6.1 APPLICANTIS PREOPERATIONAL MONITCRING PROGRAMS 6.1.1 Surface Waters This subsection describes the field and laboratory methods employed by Environmental Analysts, Inc. (EAI) of Garden City, New York, during the preconstruction aquatic baseline environmental studies at the Byron Nuclear Generating Station -Units I & 2 (Byron Station) as reported in Section 2.2. The text contains, technical descriptions of the analytical and field techniques and procedures, and the field and laboratory equipment used in assessing aquatic conditions.

Sampling design, frequency, and locations for each specific phase of the overall program are described in each individual subsection, and information is provided on the precision and accuracy of instrumentation used to collect or analyze the data.The baseline surveys established sampling transects and inventoried benthos, phytoplankton, zooplankton, periphyton, fish, bacteria, water'chemistry, and physical measurements.

The first year (1972 through 1973) baseline survey, conducted from April 1972 through July 1973 by EAI, was designed to deter-mine the identification and abundance of phytoplankton, zooplankton, periphyton, and benthos; .to assess species composition and size distributions of fishes; and to take replicate samples of water chemistry, bacteria, and physical measurements in the intake and discharge areas. The results and projections of construction impact concluded from the 1972 through 1973 studies were included in the Byron Nuclear Generating Station Construction Phase Environmental Report (Docket Nos. STN 50-454 and STN 50-455),}

Subsections 2.7.1;5.1.1; 5.1.2; and 5.1.3.After the July 1973 field survey, a review was initiated that resulted in defining the 1973 through 1974 aquatic monitoring program, which was initiated in Septemter 1973 and conducted through October 1974. The purpose of the 1973 through 1974 monitoring program was to provide a second year of data to supplement observations made during the first-year (1972 through 1973) program. Tables 6.1-1 and 6.1-2 summarize the physical, chemical, and biological parameters measured during the 1973 through 1974 program.Locations of the sampling stations are shown on Figure 6.1-1.Sampling of the Rock River was undertaken on five transects (R-1, R-2, R-3, R-4, and R-5) from a point 2.4 miles upstream of Byron, Illinois, to just upstream of the dam at Oregon, Illinois.

These transects were selected to yield data indicative of conditions in zones of the Rock River that could potentially be influenced by the construction and operation of the Byron Station. The 6.1-1 RS-14-051 Enclosure, RAI AQ-lf Response Page 150 of 178 Byron ER-OLS transect areas for this study reflected some of the ranges of habitats between the Oregon and Rockford dams. In addition to the sampling on the Rock River, sampling stations were established in the mouths of tributary streams to the Rock River in the site area. During the 1972 through 1973 program, there were initially nine creek sampling locations:

Stillman Creek (S-1), Mill Creek (S-2), Woodland Creek (S-3, W-1, W-2, and W-3), Leaf River (S-4), Spring Creek (S-5), and Silver Creek (S-6).During the 1973 through 1974 program, Stations S-3, S-4, S-5, S-6, W-1, and W-2 were retained.This subsection also describes a construction stage monitoring program conducted by Espey, Huston & Associates, Inc. (EHSA) of Austin, Texas, that will continually assess the biotic communities in the Byron Station site area and document any macroscopic changes that result from plant construction activities (see Section 4.1). Particularly important to this program are those aquatic species that either are sensitive indicators of biotic stability or require additional examination to document their composition and abundance because of seasonal or annual population fluctuations.

The data from these construction stage monitoring studies, added to previous baseline data collections, will reflect the natural biotic fluctuations in the Rock River and the six creeks in the area (Stillman, Mill, Woodland, Leaf, Spring, and Silver creeks) before plant operation.

Operational data can then be compared with these data.6.1.1.1 Physical and Chemical Parameters The programs and methods for measuring the physical and chemical parameters of surface waters that may be affected by the construction and operation of the Byron Station are described in this subsection.

6.1.1.1.1 Baseline Proqram Physical and chemical parameters measured in the field during the 1973 through 1974 baseline surveys included light penetration, current velocity, water temperature, turbidity, alkalinity, pH, and dissolved oxygen (DO). Water samples were collected in I-gallon containers from mid-channel at five Rock River stations, three tributary streams, and two Woodland Creek stations (see Figure 6.1-1). Each sample was preserved with chloroform at 10 ml/gallon.

All water samples were refrigerated at 4 0 C before analysis.

The parameters described in Table 6.1-2 were analyzed according to Standard Methods, 13th Edition (American Public Health Association

[APHA] 1971), except for trace metals, calcium, magnesium, sodium, and total hardness, which were analyzed according to Methods for Chemical Analysis of Water and Wastes (U.S. EPA 1971). All parameters, with the exception of pH, were analyzed in duplicate and averaged, with values presented in milligrams per liter (mg/liter).

The U. S.Environmental Protection Agency Analytical Quality Control 6.1-2 RS-14-051 Enclosure, RAI AQ-lf Response Page 151 of 178 Byron ER-OLS Laboratory provided reference samples that served as independent within-the-laboratory checks on reagents, instruments, and techniques.

Sample analysis checks were made by an independent laboratory, Illinois Water Treatment Company of Rockford, Illinois.

Standard deviations for most parameters were calculated from 25 tests for each parameter to indicate any variability in the laboratory techniques.

Dissolved oxygen concentrations were measured at mid-depth in the center of the river and the tributary stream channels.In conjunction with the chemical analysis, selected physical measurements were recorded (see Table 6.1-2). The following paragraphs describe the methods and instrumentation used to make physical measurements.

Two instruments were used to determine flow rates of the water in the Byron Station site area. The first instrument was a G. M.digital flowmeter (G.M. Manufacturing and Instruments Corporation El Cajon, California), which is a propeller-driven device with a digital counter. This meter was calibrated to a known flow rate and gave readings as units per given period of time. To obtain velocities, readings were taken just below the surface for three 60-second immersions with the front of the meter pointed against the current.The second method instrument was a Marsch-McBirney Model 711 water current meter (Marsch-McBirney, Kensington, Maryland) with a solid-state water velocity sensor operating on the principle of electromagnetic induction.

The meter had a probe that can measure two orthogonal components of water flow, the side flow and the normal current. The meter gave readings directly in feet per second. Water conductivity variations did not affect the meter calibration.

Air and water temperatures were normally taken-during all sampling periods of the 1973 through 1974 baseline surveys.Water temperatures were determined at mid-depth in the center of the river and stream channels.

The Yellow Springs oxygen meter was equipped with an oxygen temperature probe to double its function.

In addition, a standard centigrade thermometer was used to periodically check meter accuracy.Transparency was determined using an 8-inch diameter (20 cm)Secchi disk with alternating black and white quadrants.

The disk was lowered into the water on a calibrated line. When the demarcation between the black and white quadrants became obscure, the distance was recorded.

Three readings were taken at each sampling station.In addition to taking Secchi readings during periphyton sampling, an Inter-Ocean Model 510 submarine illuminance meter (Inter-Ocean systems, Inc., San Diego, California) was used to record light penetration at this time. The instrument is designed to measure comparative illuminance between the surface and various 6.1-3 RS-14-051 Enclosure, RAI AQ-lf Response Page 152 of 178 Byron ER-OLS subsurface levels. This device employs battery operated photocells enclosed in a deck (or surface) unit, and a submersible unit. Readings were taken from a meter aS illumination in lux units. Measurements for the survey included a deck reading and two subsurface readings that were recorded as the depths in inches at which 50% and 25% of the available light penetrated the water. Three measurements per station were taken.6.1.1.1.2 Construction Stage Monitoring Program Duplicate water chemistry samples for the parameters listed in Table 6.1-3 were taken quarterly at Stations R-1 through R-5, S-3, S-5, S-6, W-l, and W-2. Each sample was drawn from A 481-liter composite sample, as outlined in the phytoplankton prdqram (see Subsection 6.1.1.2.2).

Water chemistry samples from Stations R-2 and R-5 were taken from the same composites as replicates 1 and 2 of the phytoplankton program (see Subsection 6.1.1.2.2).

All water chemistry and bacteriology samples were stored in sterile polyethylene bottles, precharged (when appo-priate) with preservative, kept on ice, and transported on the day of collection to Aqualab, Inc., for analysis.

The specific analytical techniques used for each parameter are referenced in Table 6.1-3.Temperature and oxygen profiles were taken at each monitoring station with a YSI model 51-A oxygen meter and a 5419 oxygen/temperature pressure compensating probe on a 50-foot lead.Current velocity profiles at 1-meter intervals were taken at all Rock River stations with a Price-type meter (W 6 L. E. Gurley Co., Model 665) fitted with a streamlined 30-pound weight.Light penetration and transparency were measured at all Rock River stations using, respectively, a Secchi disk (Welsh 1948)and a 4w light meter constructed as outlined in Maddux (1966) and Rich and Wetzel (1969).Turbidity was measured at all Rock River stations, in the field, using a Jackson Turbidimeter (APHA 1971) if turbidities were in excess of #0 JTU. If turbidities weje less than 40 JTU, they were measured in the lab with a Each Nephelometer.

Field meAsurements of pH were made at all stations using a Chemtrix type 40, battery operated pH meter.6.1.1.2 Ecological Parameters The programs and methods for measuring the biological parameters of surface waters that may be affected by the construction and operation of the Byron Station are described in this subsection.

6.1-4 RS-14-051 Enclosure, RAI AQ-lf Response Page 153 of 178 Byron ER-OLS 6.1.1.2.1 Baseline Program The second year (1973 through 1974). baseline survey is summarized in Table 6.1-1. Sampling frequency varied from parameter to parameter in an attempt to correlate frequency with life histories.

The frequencies are included in Table 6.1-1 as well as in the discussion of survey methods that follows.Bacteria samples were collected from the five Rock River stations (R-1, R-2, R-3, R-4. and R-5), three tributary streams (S-3, S-4, and S-5), and two Woodland Creek pools (W-1 and W-3).Samples were collected underwater in sterile BOD bottles, and plates were made the same day. Bacteria samples were analyzed according to procedures outlined in Standard Methods (APHA 1971).Two plates per bacteria sample were made for each test, and the counts were averaged.Total coliform and total bacteria tests were conducted using premade milliliter ampoules of ENDO and TOTAL agar. After an incubation of 22 to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> at 350

• 0.50 C, counts were made and numbers reported per 100 ml of water sampled. The fecal streptococcus test involved preparing an agar medium using M-Enterococcus agar, which has a high selectivity of recovery of all fecal strep species. Streptococcus plates were incubated 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> at 350 +/- 0.50 C The fecal coliform test involved their incubation in M-FC broth at 44.50

• 0.20 C for 22 +/- 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.Equipment for bacterial analysis included a vacuum pump, sterile membrane filters of 0.45 pm pore size, sterile agar pads, dis-posable sterile petri dishes and pipettes, and a Napco constant temperature apparatus for incubation.

Phytoplankton samples were collected on September 11, 1973 from the five Rock River stations (R-1, R-2, R-3, R-4, and R-5) and three tributary streams (S-3, S-4, and S-5). Beginning October 16, 1973, phytoplankton sampling was conducted at river stations P-2 and R-5 only. Duplicate samples were taken from mid-channel sampling locations by immersing 1-liter polypropylene bottles under the surface of the water. The phytoplankton samples were preserved with formaldehyde at a 1:20 ratio. The preserved samples were transported to the laboratory, where they were concentrated 10 to 20 times by adding 1 to 2 drops of acid Lugol's solution, which caused the organisms to settle to the bottom of the container.

Samples were allowed to settle for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />, after which the supernatant was siphoned off. The concentrate was then stored in 50-ml containers.

Permanent mounts (for diatom classification) and semi-permanent mounts (for non-diatom identification) were prepared.Phytoplankton were reported in units per milliliter using the following system: 6.1-5 RS-14-051 Enclosure, RAI AQ-lf Response Page 154 of 178 Byron ER-OLS Algal Form Unit Diatom Each Frustule Single celled Each cell Colony Every four cells (except for the genera AphanocaMsa, Aphanothece, and'Microcystis, which were reported in 50-cell units).Filament 100-micrometer lengths The following taxonomic references were used to identify phytoplankton species: Bourrelley (1968,19703, Cleve-Euler (1968), Hustedt (1930), Patrick and Reimar (1966), and Prescott (1962). Samples were then examined for relative abundance, species diversity, biovolume, and biomass. Relative abundance was expressed as the number of individual species per liter and as the percent of total number of organisms present. The seven most abundant species present were selected as the dominant species.Species diversity was measured using the Shannon-Weaver (Shannon 1948) index, which is described by the following equations (Lloyd et al. 1968): 1-I H = ( (N log N -Enlog n.) (6.1-1)i=1 where: H = community diversity N = total number of individuals present ni = number of individuals of species i s = total number of species and: 1 max= log s (6.1-2)where: Smax= maximum diversity possible in a community com-posed of s species Biovolume was determined using the analytical method presented by Prescott (1951), which is described by the following equations:

N/1 = s A (6. 1-3)DF L- c Vd N C Fc.ddf 6.1-6 RS-14-051 Enclosure, RAI AQ-1f Response Page 155 of 178 Byron ER-OLS where: N/I = number of individuals per liter Ns = number of individuals of species per transect of coverslip D F = diameter of field of microscope in centimeters L = length of coverslip in centimeters Vd = volume of drop of sample Nd = number of drops of sample Ac = area of coverslip C = concentration factor f and: pI/liter = NlVi = biovolume (6.1-4)109 where: N = number of individuals V 1 = volume of individual species examined Biomass was calculated from biovolume using the conversion factor of 1 gm = 1 cm'.Zooplankton samples were collected September 11 and October 16, 1973, from mid-channel of the five Rock River stations (R-1, R-2, R-3, R-4,, and R-5) and three tributaries (S-3, S-4, and S-5).Beginning January 28, 1974, zooplankton sampling was conducted at river stations R-2 and R-5 only. For each sample, 60 liters of surface water was concentrated by passing it through a No. 20 mesh nylon plankton net (approximately 50 Am). For more efficient and accurate measurement of water volume through the net, water was poured through the net by bucket (UNESCO 1968).The concentrate, representing 60 liters of water, was preserved in bottles by adding formalin in a 1:10 ratio. Duplicate samples were taken at each location.

The zooplankton were examined by using a Sedgewick-Raftex counting slide, which holds 1 cm 3 of water. Three slides per sampling station were examined in full.Analyses were made of species composition, relative abundance, and total plankton count. Numbers of plankton per liter were calculated using the following equation:.

Number counted/(cm')

x volume of concentrate (cm3) = Number/liter 60 6.1-7 RS-14-051 Enclosure, RAI AQ-If Response Page 156 of 178 Byron ER-OLS Zooplankton were identified using the taxonomic publications of Eddy and Hodson (1961), Edmondson (1959), Kudo (1966), Needham and (1938), and Pennak (1953).Periphyton samples were collected at the five Rock River stations (R-1, R-2, R-3, R-4, and R-5), three tributary stream stations (s-3, S-4, and S-5 from September through December 1973, and S-3, S-5, and S-6 from January through September 1974), and two Woodland Pool stations (W-1 and W-2) from September 1973 through September 1974.Two diatometers of the Ruth Patrick (Patrick and Reimer 19660 and J. W. Foerster (1969) design were placed at river transects R-1, R-2, R-3, R-4, and R-5, approximately 20 feet from shore. One diatometer was placed at mid-channel near the mouth of each of the three tributary streams. The other diatometer was placed at each of two stations (W-1 and W-2) established further ubstream on Woodland Creek. Each diatometer contained ten 25 x 75 mm microscope slides. Three slides were selected from each diatometer for analysis.

Samples were analyzed for species composition, relative abundance, species diversity, community similarity, biovolume, biomass, and chlorophyll a.Additional diatometers were placed at transects R-2, R-3, and R-4, two per transect, one diatometer on each side of the river.The additional samples were collected every other month, beginning in January 1974, and were analyzed for species diversity, community similarity, biovolume, and biomass. The periphyton communities present at each transect were compared using non-parametric analyses for differences on the same transect and for differences between transects.

Light penetration, temperature, velocity, and depth of the diatometer were conducted as ancillary measurements.

Species composition and relative abundance were determined by methods described in the previous section for phytoplankton.

Species diversity was determined using the Shannon-Weaver diversity index just discussed for phytoplankton.

Community similarity was determined by Morisitals index of overlap, which is described by the following equation as modified by Horn (1966): I = 2 (bi) (6.1-5)i= 1 A s a.2 b.where: _- b + b B ]I = the index of overlap i = the species number a. = the density of species i in sampling site A 6.1-8 RS-14-051 Enclosure, RAI AQ-lf Response Page 157 of 178 Byron ER-.OLS b -the density of i in sampling site B s = the total number of different species in both sites A = the total number of individuals in sampling site A B = the total number of individuals in sampling site B The periphyton communities present at each transect were compared to determine degrees of similarity and difference.

The index is not only a measure of similarity, however, it is also a measure of the probability that two individuals drawn at random from different communities will belong to the same species relative to the probability of finding two randomly chosen individuals of the same species from the same community.

Biovolume was determined using the Prescott (1951) method of analysis.

Results were expressed as biovolume per square millimeter of slide area. Biomass was determined by the conversion factor of 1 gm = I cm kiovolume.

Benthic communities were sampled at the five Rock River transects, the six stream mouth stations, and the two Woodland Creek stations.

River stations were sampled using a Ponar grab sampler that is designed to cover a. 9 x 9-inch area of substrate surface. A winch system was employed to lower and raise the 60-pound sampler. This type of sampler is well adapted for use on sand, gravel, or rock bottoms. The jaws are machined-tapered and have an attached underlip that enables the jaws to avoid most stones and gravel, which jam other bottom samplers.Twelve samples were taken in each river transect, four from near shore on each side and four from mid-river during September and October 1973. Only six grab samples were taken at each river transect during February 1974 and each subsequent sampling month.As each sample was taken, grab size (light, medium, or full) and bottom type (sand, fine gravel, silt, muck, etc.), as outlined by Lagler (1970), were recorded.Two samples were taken at a point near the mouth of the six streams in the study area. The sampler used in these locations was a Birge-Ekman grab sampler that covered a 6 x 6-inch area.This sampler was used because soft sediment is commonly present in the stream mouths and because, according to a study comparing the Ponar and Birge-Ekman dredges, the Birge-Ekman model is more effective with soft substrates, such as silt and muck (Howmiller 1971).Benthos were sampled at two stations in Woodland Creek (W-1 and W-3), with three samples taken at each station. All samples were washed in a screen-bottom wash bucket. They were subsequently placed in plastic bags, marked for identification, and packed in ice or refrigerated until the analyses were performed.

In the 6.1-9 RS-14-051 Enclosure, RAI AQ-lf Response Page 158 of 178 Byron ER-OLS laboratory, each sample was sorted by hand using a series of U.S.Standard sieves. The organisms present were removed and preserved for identification in vials containing 70% alcohol.Analyses included species composition, relative abundance, and weight (biomass).

Species composition of benthos will provide a basis for evaluating water quality in the study area (Hynes 1963). The keys used for benthos identification were those of Eddy and Hodson (1961), Edmondson (1959), Pennak (1953), Needham and Needham (1938), and Mason (1968).Fish egg and larvae sampling was conducted monthly during April, May, June, and July, beginning in 1974, at river transects A-i through R-5 and stream transects S-3, S-4, and S-5 using a #o. 10 mesh nylon plankton net with a 0.5-meter diameter opening. The boat was anchored at each transect, with the flow of the river determining the amount of water filtered through the net. Flow rates just below the water surface, where the net was suspended, were measured at each station using a G. M. digital flowmeter.

The amounts of water filtered through the net in a given period of time were thus determined.

The net was left in the water for 15 minutes at each transect.The flow rates of the river averaged from I to 2.5 ft/sec, or less than 3 knots (1 knot = 0.5 m/sec). These speeds are generally considered equal to or slower than a low-speed tower;thus, a low filtration pressure, or pressure drop, across the meshes of the net was attained to better prevent damage to the fish eggs and larvae (Tranter 1968).upon completion of a 15-minute sampling period, the collected material was transferred to jars from the plankton bucket attached to the net, and formalin was added in a 1:10 ratio for preservation.

In the laboratory, each sample was picked through by hand, and the numbers of fish eggs and larvae were recorded.These numbers were then used as an indication of abundance for a given volume of water.Fish sampling was conducted by seining and electrofishing.

Seine samples were collected either with a 10-foot or a 50-foot beach seine with 0.25 inch mesh. The seining catch was expressed in numbers of fish caught per square foot of net coverage.As the least selective of all active fish sampling methods (Ricker 1968), electrofishing allows maximum coverage of a habitat, a necessity in survey work. Each river station was electrofished for 15 minutes on each side of the river. The electroshocking unit uses a Homelite 2000-watt, 230-volt, 3-phase generator.

Each of the three leads was run from the generator, past a series of toggle switches and a dead-man microswitch assembly, to lightning rod electrodes suspended from a boom approximately 6 feet in front of the boat. A distance of 6 feet between electrodes ensures complete coverage of the unit when it is in operation.

The generator and shocking assembly was modeled 6.1-10 RS-14-051 Enclosure, RAI AQ-lf Response Page 159 of 178 Byron ER-OLS after the electrofishing units used by the Illinois Department of Conservation.

Length-weight curves were computed for certain species by using the following length-weight equation (Lagler 1970): log W =log a + n log L (6.1-6)where: L = length W = weight a = interception of the y-axis log a = Ealog W "(logq L) -)EL .'2 loq ,.loci W)n .(" log L)2* --'og L)2=n = FoCI W (N *loci a)E log L Condition factors for 10 individuals of each of the 5 most important species were computed from parameters from sexed fish to provide indexes of physical condition.

The condition factor (K) is defined mathematically as: W K = L3 (6.1-7)where: W = weight of an individual fish L = length of an individual fish Analyses of stomach contents and ectoparasites of 10 individuals of each of the 5 most important species were documented.

Stomach contents for specific foods were reported as percentages of total numbers of ingested material.

For ectoparasite work, the anterior gill arch was examined, and parasites were counted and identified using publications by Inman and Hambric (1970) and Amlacher (1970).Fish were identified with the aid of keys developed by Eddy (1969), Hubbs and Lagler (1959), and the Illinois Department of Conservation (1970).A creel census was conducted by interviewing fishermen who use the Rock River within the study area. A questionnaire was prepared, and a fieldworker interviewed bank fishermen.

Information sought in the interview included data relating to species preference, hours fished on day of census, numbers of fishing trips to Rock River per year, and average catch per trip.6.1-11 RS-14-051 Enclosure, RAI AQ-lf Response Page 160 of 178 Byron ER-OLS other data such as species caught, lengths and weights of fish on their stringer, numbers of rods used, and suitability of the day for fishing were also recorded.

Creel census data will be projected for use in estimating fishing pressure in the study area and to define zones in the study area most heavily used by sport fishermen.

A sample creel census questionnaire is shown in Figure 6.1-2.6.1.1.2.2 Construction Stage Monitoring Program The construction stage aquatic monitoring program described Ln this subsection is part of a 5-year study that began in March 1975. Table 6.1-4 presents a summary of the program. All sampling programs are conducted quarterly at specified stations among those identified and located in Figure 6.1-1.The term "dominant" refers to any species or taxonomic unit that constitutes 51 or more of the total standing crop at the location(s) under consideration.

Bacteria samples were collected at Stations R-1 through R-5, S-3, S-5, S-6, W-1, and W-2 on a quarterly schedule.

Each sample was drawn from a 48-liter composite sample taken as outlined in the phytoplankton section that follows. Bacteria samples from Stations R-2 and R-5 were taken from the same composites as replicates 1 and 2 of the phytoplankton program. All bacteriology samples were stored in sterile polyethylene bottles, precharged (when appropriate) with preservative, kept on ice, and transported on the day of collection to Aqualab, Inc. for analysis.

The analytical techniques used are referenced in Table 6.1-3.Phvtoplankton samples were collected quarterly from Stations R-2 and R-5. Four replicate samples were taken, each consisting of eight 6-liter, plastic kemmerer bottle hauls from a depth of I meter. The 48-liter replicate was accumulated in a polyethylene container and continuously mixed as the required subsamples were withdrawn.

sampling at Stations R-2 and R-5 was conducted simultaneously, using two crews, to ensure the comparability of the results.Phytoplankton enumeration was accomplished using a 2-liter phytoplankton sample drawn from each replicate and preserved with-M3- (Meyers 1971) at a final concentration of 3%.Lab processing included the identification and enumeration of preserved material.

Approximate phytoplankton densitities were first estimated in order to calculate the number of fields to be censused for a given collection date.total plankton were counted starting with a suitable volume, determined In a preliminary examination, of fixed material placed in a sedimentation chamber to concentrate the plankton.

Settling was facilitated by the addition of a small amount of deterqent 6.1-12 RS-14-051 Enclosure, RAI AQ-lf Response Page 161 of 178 Byron EP-OLS (APHA 1971), and sedimentation was assumed to take place at a maximum rate of 3 hr/cm (Vollenweider 1969). That is, the minimum sedimentation time for a sample was equal (in hours) to three times the height of the water column in centimeters.

The concentrated sample was enumerated at 400x magnification in a counting chamber that was shallow enough to allow the use of a high-dry (40x) lens (Palmer and Maloney 1954). All organisms encountered in these water mounts were enumerated with non-diatoms identified and measured and diatoms simply counted and lumped under "centric" and "pennate" categories.

The number of fields counted within each of the four replicates was adjusted for each collection date to ensure that at least the minimum of 500 individuals was counted in the least dense sample for that date. The same number of microscope fields (at 400x) was used to count each replicate.

Biovolumes for the species present in a sample were estimated by first measuring the dimensions of all the individuals encountered, up to a maximum of 10, 10 being the number of individuals usually considered adequate (APHA 1971). Biovolumes were then calculated on the basis of geometrical formulae appropriate to each species.Diatoms were enumerated by separate counts to identify, measure, and enumerate diatom species because they were usually not distinguishable in the water mount preparations.

An aliquot from each sample was taken, concentrated by centrifuging, acid cleaned, mounted in HyraxR, and enumerated using the methods outlined in Patrick and Reimer (1966) and APHA (1971) to obtain relative abundances.

A minimum of 300 individuals was ounted from each replicate.

These proportional counts were then applied to the total counts of combined diatom taxa enumerated in the water mounts to break down the total counts into individual species abundances.

Less error was introduced into the censuses by this method than would have been introduced by an attempt to equate absolute abundances (density and biovolume) of diatoms and other algae using entirely different sample treatments.

Biovolume was expressed in p1/liter units. Density was expressed as Wo. cells/ml where possible.

Filamentous forms were expressed as standard length units of 100 pm/ml, colonial forms with consistent cell numbers were recorded as a single unit, and large colonies with variable cell numbers were reported in terms of cell groups. The biovolume formula of single counting units is listed for each taxon in Appendix 6.1A, Table 6.1A-1. Species diversity (HB) and redundancy (r) were calculated according to the methods outlined in Wilhm and Dorris (1968). The following equation was used to calculate species diversity (He): H' ME P (6.1-8)where: pi = the proportion of the ith species 6.1-13 RS-14-051 Enclosure, RAI AQ-lf Response Page 162 of 178 Byron ER-OLS Redundancy (r) was then calculated using the following equation: r = (B'max -') / (B'max -H' min) (6.1-9)Chlorophyll a was analyzed from a 2-liter subsample from each replicate.

These subsamples were placed in 1-liter polyethylene bottles and immediately frozen on dry ice. The samples were kept frozen and in darkness until analysis.Samples taken for chlorophyll a analysis were concentrated by filtration through AA (1.Opm) Millipore filters (Creitz and Richards 1955), and the pigments were extracted in 90% acetone.Optical density (O.D.) was measured on a spectrophotometer using an absorption cell with a path long enough to produce an O.D.reading between 0.2 and 0.5. The exact procedures followed were those outlined in Stickland and Parsons (1968). Chlorophyll a concentrations were calculated using the Chlorophyll-Pheophytin Method (Strickland and Parsons 1968; APHA 1971; Moss 1967;Lorenzen 1967). This method was preferred over the trichromatic method (Parsons and Strickland 1968), which is standard in oceanographic work, because fresh waters often contain significant quantities of the chlorophyll degradation product pheophytin which, if present, can lead to serious overestimates of chlorophyll a.Primary production was measured using the carbon-14 technique outlined in Section 601f of Standard Methods (APHA 1971) and in Strickland and Parsons (1968). This method results in an estimate near the net production, since the quantity measured is the amount of radiocarbon residing in the particulate phase of the sample at the end of the incubation period. This value represents the total carbon fixed during incubation, minus the carbon released in respiration or excreted from the algal population.

The radiocarbon source used consisted of a C-14 labeled sodium bicarbonate solution of 5 pCi total activity sealed in l-ml ampoules, which were obtained in standardized lots from New England Nuglear Corporation.

Incubations were performed in 300-ml Wheaton BOD bottles that were sterilized before each use.Two three-bottle sets, each consisting of two light (clear)bottles and one dark (to correct for heterotrophic fixation and adsorption) bottle, were filled with water from the first two 48-liter composite samples taken at the appropriate stations (one set for each sample). The two three-bottle sets were thus taken from the same samples as replicates 1 and 2 for water chemistry, phytoplankton, and chlorophyll a determinations.

The contents of a l-ml C-14 ampoule were added to each bottle, and all bottles were suspended at a standard depth of 1 meter from an anchored float at the station from which the sample water was collected.

Samples were allowed to incubate from 2 to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />. Incubation was terminated by the addition of 2 ml of 37% formaldehyde.

In the lab, the entire contents of each bottle was filtered through 6.1-14 RS-14-051 Enclosure, RAI AQ-lf Response Page 163 of 178 Byron ER-OLS a 0.45 jo membrane filter that was then dried and dissolved in a dioxane cocktail.

The rate of p-decay (as counts per minute) was then determined in a liquid scintillation counter. At this time the background radioactivity and total activity of the lot of ampoules were also determined.

The calculations were performed as outlined in Standard Methods (APHA 1971).Zooplankton samples were collected quarterly at Stations R-2 and R-5 (see Figure 6.1-1). At each station, the quarterly sample consisted of four replicates, each a composite of eight vertical hauls with a No. 20 (80 prm) mesh plankton net. The samples were immediately preserved by adding a sufficient amount of 37%formaldehyde to yield a final concentration of about 5%.In the lab, sample volumes were standardized to 1 liter and surveyed to determine the volume to be processed in order that the least dense replicate from the two stations would yield a count of at least 300 zooplankters.

The subsamples were then counted in Sedgwick-Rafter cells at 100x magnification.

Cladocerans and adult copepods were identified to species, as were rotifers when possible.

Immature copepodite stages of copepods were identified as cyclopoid, calanoid, or harpacticoid.

Copepod nauplii were identified as such, without further differentiation.

Densities were calculated as number per cubic meter. Species diversity (H') and redundancy (r) indexes were calculated as outlined by Wilhm and Dorris (1968). The following equation was used to calculate species diversity (H'): H' mOi ln pi (6.1-8)where: pi = the proportion of the i thspecies Redundancy (r) was then calculated as follows: r = (HI max- Be) / (H' max -He m6n mBax m-x Hmin)619 station differences in abundance of categories and dominants were tested by one-way analysis of variance (ANOVA), and subsequent pair-wise testing of station means was done by Scheffe's multiple comparison.

Before testing, a In (x + 1) transform was applied to the density data. For all statistical tests, an a priori level of significance of 5% (P<0.05) was chosen.Periphyton samples were collected in two separate programs, the"quarterly" series and the "bimonthly" series. Laboratory processing for the two programs was identical.

It is discussed in the following paragraphs.

6.1-15 RS-14-051 Enclosure, RAI AQ-lf Response Page 164 of 178 Byron ER-OLS The quarterly periphytor samples were collected from natural substrates at Stations R-I, R-5, S-3g S-5, W-1, and W-2 during May and July. All samples were taken at an approximately 0.25-meter depth using a toothbrush and a series of acetate templates to remove all growth from 10 cm 2 on each of eight replicate substrates at each station.Beginning with the October sample, this program was changed in two ways. First, periphyton was no longer collected from natural substrates but from plexiglass slides identical to those used in the bimonthly collections.

The following discussion of the bimonthly series thus applies to the quarterly series beginning with the October 1975 samples. Second, three more stations, R-2, R-3, and R-4, were added to the quarterly series. Eight replicate substrates were taken from a single diatometer at each station.The bimonthly fartifical substrate) series of periphyton samples were taken at stations on either side of the river at Stations R-2, R-3, and R-4. A diatometer was positioned on each side of the river at these locations.

These locations (stations) were designated 2R and 2L, 3P and 3L, and 4R and 4L with the R and L representing the right (west) and left (east) sides of the river, facing downstream.

After approximately 1 month's exposure, four of the eight replicate samples were removed from each diatometer.

The sample surfaces consisted of plexiglass slides having a total surface area of 20 cm. These were held in a vertical position in the diatometer to minimize siltation.

The diatometers were floating plexiglass platforms designed to hold the substrate slides at a constant depth of 0.25 meter (modified from APRA 1971). Collections were made by placing Tach replicate slide (four per station) in a labeled Whirl-Pak bag with a small amount of distilled water and M3 perservative (Meyers 1971). The periphyton was subsequently scraped from the substrates in the lab.Lab processing for all periphytor samples was carried out in the same way regardless of the program it came from. scrapings from half of the replicates from each station were suspended in 50 ml of water and M 3 fixation.

From this point on, identification and biovolume estimates followed the procedures outlined in the phytoplankton paragraphs except that concentration by settling was generally not necessary.

The results were expressed on an areal basis as specified (i.e., density as No./10 cmg and biovolume as pl/10 cm2). The geometrical formulae used to calculate biovolumes, and the taxa to which they were applied, are listed in Appendix 6.1A, Table 6.1A-1. Species diversity and redundancy values were calculated according to the methods of Wilhm and Dorris (1968) (see Appendix 6.1A, Table 6.1A-2). The following equation was used to calculated species diversity (H'): HI lEpiIn P1 (6.1-8)where:.6.1-16 RS-14-051 Enclosure, RAI AQ-lf Response Page 165 of 178 Byron ER-OLS Pi -the proportion of the ith species Redundancy (r) was then calculate4 using the following equation: r = (B"max -H') / (E'max -Hemin ) (6.1-9)Scrapings from the remaining substrates at each station (both programs) were placed in separate crucibles, dried to constant weight at 1050 C, and ignited for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> at 5000 C in a muffle furnace. The ash was then rewetted with a few drops of distilled water and again dried to constant weight at 1050 C (APHA 1971).The purpose of the rewetting procedure was to ensure that the water of hydration of clay and other minerals, driven off at 5000 C, but not at 1050 C, was reintroduced and thus would not be reported as organic matter. Biomass was reported as the difference in sample weights before and after ignition per 10 cm 2 (ash-free dry weight). "Constant weight" was defined (APHA 1971)as a change of 0.5 mg or less between two successive series of operations (heating, cooling in a desicator, andyweighing).

All weighings were to the nearest 0.1 mg. A Mettler H6 balance was used for all of the weighings.

Benthic macroinvertebrate populations were assessed in two separate programs that sampled different portions of the total coommnity.

The "dredge benthos" program consisted of samples of organisms and sediments taken directly from the river bottom. In the"Hester-Dendy" program, artificial substrate samplers were used to provide habitat space for benthic organisms.

Dredge Benthos: Field Processing required four replicate benthos samples to be collected at Stations R-1 through R-S,. S-3, S-5, W-1, and W-2 during each quarterly sampling period, using a Ponar grab.Immediately after collection, the samples were split by quartering, and portions were retained for total organic carbon and particle-size analysis.

The portion intended for organic carbon analysis was frozen and transported to the lab for further processing (see water chemistry section).

Particle size and organism aliquots were preserved.by adding a 37% formaldehyde solution.Lab processing included washing and sorting dredge samples using a standard no. 30 mesh sieve and a binocular microscope.

After washing and sorting, all macroinvertebrates (from both programs)were preserved in a 70% ethanol -5% glycerine solution until final disposition.

Organisms requiring examination with a compound microscope (e.g., Oligochaeta and Diptera) were permanently mounted in Berlese's medium (Galigher and Kozloff 1971). organisms were identified to species where possible and the results reported as density (No./m 2).6.1-17 RS-14-051 Enclosure, RAI AQ-lf Response Page 166 of 178 Byron ER-OLS Particle size analysis was carried out using the methods outlined in Folk (1968). U. S. Standard No. 4 and No. 200 sieves were used to separate the following particle size categories:

Gravel = >4.75 -m Sand = 4.75 mm>d>0.074 mm Silt 4 Clay = d>0.074 mm The silt and clay fractions were separated and their contributions estimated by using the pipette technique.

Hester-DendX Sampling Proqram: Benthic organisms were collected from four replicate artificial substrates every month (March through August in 1975; from April through September beginning in 1976) at Transects R-2, R-3, and R-4. Two samplers were located on each side of the river at these transects.

The substrates used were modified Hester-Dendy samplers.

These were constructed of nine circular, hardboard plates 6.3 cm in diameter.

The plates were arranged in sequence so that the spacing of the plates varied from 0.3 to 1.3 cm. The total surface area exposed in these samplers was about 0.06 mi.The samplers were exposed for a 2-month period, suspended just below the water surface from an anchored float. They were collected with a dip net, and the entire sampler was stored in a quart mason jar containing 10% formalin for transport to the lab.The Hester-Dendy substrates were brushed and washed on No. 30 mesh sieves and examined using a binocular microscope.

The results were expressed as No./m2 for each species. As with the dredge samples, identification was to species where possible.species diversity and redundancy were calculated according to the methods outlined in Wilhm and Dorris (1968).Fish were sampled quarterly at six stations by electroshocking, seining, and hoop netting. Drift net samples at eight stations were collected monthly from May through August (see Figure 6.1-3). A creel census was conducted from Byron to the Oregon dam roughly every three days during June, July, and August 1975 (see Figure 6.1-4).The 1975 through 1976 quarterly seine, electroshock, and hoop net samples were collected from April 28 through May 1 (spring), July 7 through 10 (summer), and O5ctober 10 through 16 (fall), 1975.No February 1976 (winter) sample was collected due to ice con-ditions on the river.Drift net collections at Stations R-1, B-2, R-3, R-4# R-5, S-3, S-5, and S-6 were made over a 4-month period on April 30 and May 1, June 6 through 7, July 8 and 14, and August 5 through 7# 1975.6.1-18 RS-14-051 Enclosure, RAI AQ-lf Response Page 167 of 178 Byron ER-OLS The samples collected included those from three river transect stations (R-2, R-3, and R-4) and three creek mouth stations (S-3, S-5, and S-6). The west bank of the Rock River in the vicinity of the transects is largely comprised of a gravel bottom whereas the east bank has primarily a silty mud bottom.. Because of the dichotomous habitat, samples were collected along both shorelines at the three transect stations.

Creek stations were generally sampled by seining once up the creek from the mouth and once in the river itself at the mouth. The duplicate 2000 ft2 seine hauls were made on two consecutive days at each station using a 50-foot long by 12-foot wide keep seine of 1/2-inch Ace mesh.Hoop net collections were made at six stations with the nets generally placed in 5 to 6 feet of water. The hoop nets used were 7-ring nets, 4 feet in diameter and 16 feet long with 2-inch square mesh. A net was placed at each creek mouth (S-3, S-5, and S-6) and on each side of the river at the three transect stations (R-2, R-3, and R-4). Nets were attached to stakes driven into the bottom and oriented downstream.

Bait was canned dog food during the spring and dog food plus cheese during the summer and fall. Nets were left in place for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> on each of two consecutive sampling days.Electroshocking was done with a 220-volt, a-c pulsed signal delivered through two 5-foot electrodes.

The electrodes were boom-mounted on the front of the collection boat. Two netters swept each station, for 30 minutes shocking time on each of two consecutive days. At the river transect stations, each shoreline was shocked for 15 minutes per day.Drift net samples were collected monthly from May through August at nine stations (R-1 through R-5, S-3, S-5, S-6, and W-1). The nets were No. 0 mesh 5:1 drift nets with 0.5-meter diameters.

A General Oceanics Model 2030 flow meter was installed in the mouth of each net. Each flow meter was calibrated against the instrument's calibration curve and found to be within acceptable limits of variation from the. standard curve. The threshold velocity for this model, equipped with the low-speed rotor, is 3 cm/sec with a linear response range of 5 cm/sec to I meter/sec for the low-speed rotor. Nets were anchored in place facing upstream for 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. collected samples were immediately preserved in formalin.For fish taken by seines, hoop nets, and electroshocking, the following procedures were used: a. Each fish was identified to the lowest possible taxon (species level with few exceptions for larval fishes).b. Total catch was enumerated.

6.1-19 RS-14-051 Enclosure, RAI AQ-lf Response Page 168 of 178 Byron ER-OLS c. Total length was recorded in millimeters.

d. Individual body weight was recorded in grams after weighing on a milk-scale type balance, accurate to 1 ounce~, for larger specimens or on an 0 Haus Dial-Q-Gram balance, accurate to within 0.1 gram, for smaller specimens.

e. Scale samples were taken from fish examined for length and weight with the exception of minnows and catfish. Carp scales were also collected and aged.Ten or more scales were removed from each specimen and placed into appropriately labeled scale envelopes for later analysis.

For analysis, scales were soaked in water and brushed to remove residual tissue.Annuli were counted by direct observation with a stereoscope.

Age estimates were confirmed by reading a minimum of three scales per individual.

f. The gill chambers and external body surface of all specimens were checked for evidence of parasites and disease. Inspection included surveying the specimen for the presence of, or damage due to, the following organisms:

bacteria, viruses, fungi, protozoans, copepods, roundworms, flatworms, leeches, mollusks, and lampreys.g. A maximum of 10 adults of each species taken each day at each station by each gear type were eviscerated and their sex determined.

Cyprinids, other than carp, were an exception as their sex was not determined.

h. The stomachs collected in the previous step were examined and their contents recorded for all adult game fish, ictalurids, and carp. The stomach contents were analyzed for relative abundance of various food items.i. During the spring and fall sample periods, muscle and liver tissue from each of the two numerically most important carnivorous and herbivorous species was collected for heavy metal and insecticide analysis.Tissue from fish taken from a number of sample stations was composited for analysis wherever possible.

Game fish species were usually present in low numbers and consequently tended to be represented from only one or two stations.

Tissue samples were analyzed for trace metals (copper, cadmium, lead, zinc, and mercury) and pesticides (dieldrin, endrin, DDT, heptachlor, lindane, and aldrin) by an independent Illinois State certified laboratory.

6.1-20 RS-14-051 Enclosure, RAI AQ-lf Response Page 169 of 178 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 During the months of June, July, and August 1975, a creel census was performed approximately every 3 days during daylight hours on the Rock River from Byron to Oregon, Illinois.

Nine areas accessible from the roads paralleling the Rock River on the east (rural route) and on the west (State Hwy 2) were sampled during each separate creek census effort (see Figure 6.1-4). The usual survey took approximately 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> to accomplish.

On four occasions (June 6 and 26, July 29, and August 29) the creek census was conducted from a boat starting at Byron and finishing at the Oregon Dam. Thirty of the total of 207 interviews were obtained on these occasions.

Figure 6.1-2 is an example of a creel census questionnaire.

Whenever possible, the length and weight of all fish caught by the fisherman were recorded; however, on numerous occasions per-mission to measure the fish was not granted.6.1.2 Groundwater The groundwater regime of the Byron Station site was investigated on a regional and site basis through an integrated program of office studies, field investigation, and laboratory testing. The objectives of the regional survey were to determine the occurrence, movement, use, and general quality of groundwater.

As a part of this investigation, the regional hydrogeological system and available piezometric surface maps were reviewed.Groundwater pumpage data were collected on a county-wide basis.Data for all water wells within 2.25 miles of the site, and public groundwater supplies within 10 miles, were tabulated.

The site-area survey refined the regional data and provided site-specific physical and chemical parameters from borehole log analyses, observation wells, piezometers, pumping tests, water pressure tests, and water sample analyses.

These data were useful.in evaluating the groundwater resources and developing predictive models. The properties and configurations of the local aquifers at the site are described in Subsection 2.4.2.6.1.2.1 Physical and Chemical Parameters The monitoring program for groundwater quality and levels in the vicinity of the site began in December 1975 and was modified in April 1980. This modification involved the establishment of action guides. The guides determine that action should be taken when specific values of the monitored parameters no longer fall within the guide limits (action levels).Water quality analyses are performed in accordance with Standard Methods for Examination ofWater and Wastewater, 15th Edition (APHA 1979) and Methods for Chemical Analysis of Water and Wastes (U.S. EPA 1979). Water levels are determined using a meter connected to a probe that is lowered into the well. The meter 6.1-21 RS-14-051 Enclosure, RAI AQ-lf Response Page 170 of 178 Byron ER-OLS TABLE 6.1-1

SUMMARY

OF THE 1973-1974 AQUATIC MONITORING PROGRAM PARAMETER Phytoplankton

& Zooplankton Quantitative Quantitative LOCATION R-1 through R-5,.S-3, S-4, and S-5 R-1 through R-5, S-3, S-4, and S-5 R-1 through R-5, S-3, S-4, S-5, W-1, and W-3 R-2, R-3, R-4 FREQUENCY 1973 September and October 1974 January, April July, and October Periphyton September and October Diatometers Benthos Artificial Substrates Fish Fish Eggs and Larvae Fish Creel Census Bacteria Fish Muscle and Liver Tissue Water Chemistry (22 parameters)

Quality Control Analyses Diurnal Dissolved Oxygen Trace Metals (Cd, CO, Fe, Cu, Hg, Zn, Pb, Cr)Physical Parameters (Temperature, current velocity, turbidity, depth, light pene-tration, transparency)

R-1 through R-5 S-3, S-4, S-5, W-1, and W-3 R-2, R-3, and R-4 R-1 through R-5, S-3, S-4, S-5, W-l, and W-3 R-1 through R-5, S-3, S-4 and S-5 Study Area R-1 through R-5, S-3, S-4, S-5, W-l, and W-3 R-1 through R-5, S-3, S-4, S-5, W-1 and W-3 R-1 through R-5, S-3, S-4, S-5, W-l, and W-3 R-1 through R-5, S-3, S-4, S-5, W-l, and W-3 R-1 through R-5, S-3, S-4, S-5, W-l, and W-3 R-1 through R-5, S-3, S-4, S-5, W-l, and W-3 R-1 through R-5, S-3, S-4, S-5, W-l, and W-3 September and October Monthly, beginning in September Bi-Weekly, June through September January, April, July, and October January, March, May, July, September, and November January, April, July, and October Monthly, January to August January, April, July, and October April, May, June, and July May through September.

January, April, July, and October April and October January, April, July, and October September and October September and October October September and October October July September and October September and October May, July, and September January, April, July, and October January, April, July, and October 6.1-70 RS-14-051 Enclosure, RAI AQ-lf Response Page 171 of 178 Byron ER-OLS TABLE 6.1-2

SUMMARY

OF CHEMICAL AND PHYSICAL PARAMETERS MONITORED DURING SECOND YEAR (1973-1974)

AQUATIC MONITORING PROGRAM CHEMICAL PARAMETERS Total.Suspended Solids Total Organic Solids Total Dissolved Solids Biochemical Oxygen Demand 5-Day Total Organic Carbon Dissolved Oxygen pH Conductivity Hardness Alkalinity Chlorides Sulfates Calcium Magnesiuin Color Silica Total Phosphate Orthophosphate Nitrate Nitrite Ammonia Sodium TRACE METALS Cadmium Chromium Cobalt Copper Iron Lead Manganese Mercury Nickel Zinc PHYSICAL PARAMETERS Temperature Current Velocity Turbidity Depth Light Penetration Transparency 6.1-71 RS-14-051 Enclosure, RAI AQ-lf Response Page 172 of 178 Byron ER-OLS TABLE 6.1-3

SUMMARY

OF WATER CHEMISTRY METHODS PARAMETER Hardness Total Alkalinity Chlorides Sulfates Calcium Magnesium Color Silica Total Phosphate Orthophosphate Nitrate Nitrate Ammon ia Total Suspended Solids (non-fil-terable residue)Total Organic Solids Biochemical Oxygen Demand Total Organic Carbon (TOC)TOC (sediments)

TRACE METALS Cadmium Copper Iron Zinc Lead Chromium Mercury Sodium BACTERIOLOGY Total Bacteria Total Coliform Fecal streptococci UNITS mgCaCO 3/liter mgCaCO3/liter mgCl'/liter mgSOI/liter mgCa/liter mgMg/liter APHA units mgSiO 2/liter mgP/liter mgP/liter mgN/liter mgN/liter mgN/liter mg/liter mg/liter mg/liter mgC/liter%C mgCd/liter mgCu/liter mgFe/liter mgZn/liter mgPb/liter mgCr/liter mgHg/liter mgNa/liter Colonies/ml Colonies/ml Colonies/100 ml METHOD EDTA Methyl-orange Argentometric Gravimetric Atomic Absorption Atomic Absorption Spectrophotometric Heteropoly Blue Persulfate Digestion Ascorbic Acid Ascorbic Acid Brucine Diazotization Nesslsrization Filtration Ash-Free Dry Weight S.M.a p. 179 p. 526 p. 96 p. 331 p. 210 p. 210 p. 392 p. 306 p. 526 p. 532 p. 532 p. 461 p. 240 p. 226 p. 291 p. 292 p. 489 ASTMb EPAc p. 170 p. 76 p. 43 p. 246 p. 23 p. 29 p. 51 p. 286 p. 692 p. 102 p. 692 p. 112 p. 42 p. 246-p. 259-p. 259-p. 259 p. 185 p. 134 p. 278-p. 278 5-Day Combustion-Infrared Combustion-Infrared Atomic Absorption Atomic Absorption Atomic Absorption Atomic Absorption Atomic Absorption Atomic Absorption Atomic Absorption Atomic Absorption Standard Plate Count Membrane Filter Membrane Filter p. 257 p. 702 p. 221 p. 257 p. 702 p. 221 p.p.p.p.p.p.p.p.210 210 210 210 210 210 210 210 p.p.p-p.p-p.692 692 692 691 692 692 p. 101 p. 106 p. 108 p. 120 p. 110 p. 104 p. 118 p. 660 p. 679 p. 690 astandard Methods (APHA 1971)bAnnual Book of Standards (American Society for Testing and Materials 1972)cMethods for Chemical Analysis of Water and Wastes (EPA Water Quality Office 1971)6.1-72 RS-14-051 Enclosure, RAI AQ-1f Response Page 173 of 178 Byron ER-OLS TABLE 6.1-4

SUMMARY

OF AQUATIC BIOLOGY PREOPERATIONAL MONITORING PROGRAM AFTER 1974 AT BYRON STATION PARAMETERS Phytoplankton and Zooplankton Periphyton Diatometers (Quarterly Program)Periphyton Diatometers (Bi-monthly)

Benthos (grab samples)Benthos (artificial substrates)

Fish Electrofishing and Seining Hoop Nets Creel Census Fish Eggs and Larvae Water Chemistry (21 parameters, see Subsection 2.7.1.1.1)

Trace Metals (Cd, Co, Fe, Cu, Hg, Zn, Pb, Cr)FREQUENCY February, May, August, November February, May, August, November January, March, May, July, September, November February, May, August, November April, May, June, July, August, September February, May, August, November February, May, August, November May, June, July, August April, May, June, July, August February, May, August, November LOCATION Mid-channel R-2 and R-5 Mid-channel R-1 through R-5, S-3, S-4, S-5, W-l, and W-2 (i)2L, 2R, 3L, 3R, 4Land 4R(2)R-1 through R-5, S-3, S-5, W-l,.and W-2 (1)2L, 2R, 3L, 3R, 4L,and 4R(2)R-2, R-3, R-4, S-3, S-5, and S-6 R-2, R-3, R-4, S-3, S-5, and S-6 Study Area Mid-channel R-1 through R-5, S-3, S-5, S-6, and W-1 R-1 through R-5, S-3, S-5, S-6, W-1, and W-2(l)R-1 through R-5, S-3, S-5, S-6, W-l, W-2(l)February, November May, August, 6.1-73 RS-14-051 Enclosure, RAI AQ-lf Response Page 174 of 178 LL CREEK MAN REEK ROCK ,LEAF OODLAND\CREEK 0 1.1 3PRING CREEK iimiaz:ýr1iE i LEGEND: CREEK R RIVER TRANSECT S STREAM STATION W POOL STATION 0 SEINING LOCATION 0 .BYRON STATION M OREGON I 1I1 MILES BYRON NUCLEAR GENERATING STATION UNITS 1 & 2 ENVIRONMENTAL REPORT -OPERATING LICENSE STAGE FIGURE 6.1-I LOCATIONS OF AOUATIC SAMPLING STATIONS RS-14-051 Enclosure, RAI AQ-lf Response Page 175 of 178 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 6.2 APPLICANT'S PROPOSED OPERATIONAL MONITORING PROGRAMS 6.2.1 Aquatic Monitoring Program Operational monitoring will be initiated when Byron Unit 1 becomes operational.

The monitoring program will be conducted in accordance with the requirements specified in Byron Station NPDES Permit Number IL0048313 and with an agreement with the Illinois Department of Conservation.

This agreement consists of an evaluation, by an acceptable third party, of past and proposed aquatic monitoring programs for validity and reliability to detect gradual changes that could have an effect on the general ecology of the Rock River.6.2.2 Terrestrial Monitoring Program The monitoring programs described in Subsection 6.1.4.3.2.4 will continue for 1 year after the beginning of commercial operation of the Byron Station. Since the noise levels due to the operation of the station were predicted using standard acoustic methodology for environmental noise emmissions from power plants, a confirmatory monitory program will be implemented.

This program will consist of actual measurements of the noise levels at the four locations identified in Figure 5.6-1, and also at the two locations identified in Figure 2.7-1. These measurements will be taken first when Unit 1 and again when both Units I and 2 are operational.

6.2.3 Radiological

Monitoring Program The preoperational radiological monitoring program described in Subsection 6.1.5, with the addition of 40 other TLD sites distributed about the site boundary and at 5 miles, will continue for 2 years after commercial operation of the Byron Station begins. Thereafter, the monitoring program that will be used will be the one described in Table 6.2-1.6.2.4 Meteorological Monitoring Program The meteorological measurement program currently used at the Byron Station site is described in Subsection 6.1.3.1.1.

It is proposed that this program continue through the operational phase of the Byron Station. Any change in plans will be reported in a supplement to this Environmental Report.6.2-1 RS-14-051 Enclosure, RAI AQ-lf Response Page 176 of 178 Byron ER-OLS AMENDMENT NO, 1.JULY 1981 TABLE 6.2-1 STANDARD RADIOLOGICAL MONITORING PROGRAM:.1.8SAHMP XEDIA Air. monitoring coL&LCTION SITES Near Field *nearsite #1 (East)tearsits 62 (West)Byron..Far Field Nearsite #3 (South)Oregon.Stillman Valley Paynes Point Mtr Morris Same Am For Air Monitoring Sites plus. to other sites distributed, about the site boundary and at 5 miles 2 Dairy Farms TYPE or AMALYSIS Fliter -Gross Betah Charcoal 131 Sampling Train.*-Test and.Maintenance Filter Exchange: Charcoal Exchange Sampling Train'-Test and: Maintenance Gamma Radiation FPEQWENUI Weekly Bi-Weekly.

Weekly WeeklyýBi-Weekly Weekly Quarterly 1l Milk 1-131 Surface water Cooling Water Sample Fish Sediment Downstream of discharge.:

Inlet Discharge Oregon Pool of Rock River.Downstream of discharge:

Upstream of intake Game isotopic rsSBeta: Tritiumisotopic aamsa isotopic Weekly during* Grasing. Season -May to Oct.monthly:-

Nov.to Apr.Monthly analysis of Weekly composite.Weekly Quarterly Composite Semiannually Annually 6.2-2 RS-14-051 Enclosure, RAI AQ-lf Response Page 177 of 179 Byron ER-CLS Fish Eggs and Larvae: Fish egg and larvae% data will be collected at one river transect upstream of the Byron Station intake and in the intake forebay to contrast intake with river numbers. Sampling will be conducted for one full spawning period after Unit 2 is declared commercially operational by CECo.6.2.1.1.2 Temperature when CECo has declared both Byron Units 1 and 2 to be in commercial operation with licenses to operate at full power output, plume studies will be conducted at 3-month intervals that will terminate when four plume studies representing the four seasonal river conditions have been completed.

6.2.1.1.3 Water Chemistry Water chemistry samples will be taken upstream of the river screen house, in the outfall of the Byron Station blowdown structure, :and downstream from the blowdown structure.

Samples will be taken quarterly at mid-channel at each designated station. Table 6.2-1 shows the water quality parameters that will be measured during the Byron Station operational-phase program.6.2.2 Terrestrial Monitoring Prcqram The operational-phase terrestrial ecological monitoring program will focus on the possibility of Byron Station cooling tower impacts. An avifaunal survey will begin when the containment buildings and/or cooling towers reach 30 feet or more in height.This monitoring program will document any migratory avifaunal fatalities that result from direct collision with these station structures.

The program will continue through 1980 as an integral part of the 5-year constructicn and preoperational monitoring program.In addition, a 15-square-mile, aerial infrared photogrammetric monitoring program was implemented in July 1977. This program is designed to document any vegetational changes that result from plant construction and operation.

This program will be continued through and after plant operation to ensure complete documentation of any conceivable postoperational impacts from cooling tower salt drift.6.2.3 Radiological Monitoring Program The monitoring program described in Table 6.4-1 will continue for 2 years after commercial operation of the Byron Station begins.Thereafter, the monitoring program that will be used will be the one described in Table 6.2-2.6.2-3 RS-14-051 Enclosure, RAI AQ-lf Response Page 178 of 179 Byron ER-OLS AMENDMENT NO. 1 JULY 1981 6.3 RELATED ENVIRONMENTAL MEASUREMENT AND MONITORING PROGRAMS The Byron Nuclear Generating Station -Units 1 & 2 (Byron Station) aquatic monitoring area is shown in Figure 2.2-1. The intake and discharge points of Byron Units 1 and 2 are located near Rock River mile 115. Agencies and/or groups known to have conducted environmental studies in this area are described in the following paragraphs.

The Illinois Department of Conservation conducted extensive sampling of the Rock River in Illinois including the area near the plant during 1965, 1973, 1974, 1976, and 1977 to assess the I general status of fish populations.

They also conducted restricted sampling for selected parameters during 1971 and 1976.Samples were collected by electroshocking at 6 stations during 1965, 11 stations during 1974, 5 stations during 1976, and 11 stations during 1977. In 1973, two 4-mile sections of the Rock River were sampled intensively by electroshocking, basket trap, and trap net. One of the stations during the 1974 sampling was also sampled by basket trap. Some of the stations sampled during 1977 will be sampled annually to measure changes in population.

Special samples were collected by seining with a 30-foot bag seine at two stations during 1971 to determine general reproductive success and by electroshocking at four stations during 1976 to determine walleye abundance.

Stations in the immediate vicinity of the Byron Station discharge were sampled by net, basket, and electroshocking in 1973 and 1974 and by electroshocking in 1976 and 1977. A summary table of catch per unit effort for each species for these years is included as Table 6.3-1.The Illinois Department of Nuclear Safety (IDNS) is expected to conduct a small radiological monitoring program at and near the Byron Station once station operation begins. In addition, it is expected that IDNS will conduct independent effluent measurements 1 both on and off site.6.3-1 RS-14-051 Enclosure, RAI AQ-lf Response Page 179 of 179 Byron ER-OLS Q 0 H-14-N 411 N .4 in r- N N Ut m. m4 .4N 4-00WD.4 i*4 t-C" In a;m1l C C"4 M 0000 m If0.440.4 '%0 ccDw 00 4 1M NM -.4 N 0 0 0 1,4 R'C; 4 m 0 en00 m 0&n 0.r4 .4 `C0 00C;C 64 ioM .4.4iiqm 4 mc i' 0: .00 o mO0 wmr4 Qw inN4 m t i 0 m-1 .4 .44 (q 00-4 00Q0Q V6 C!CD C r-NO C.440 at vw4#00000000ný0000 020000 w N%coo 0 0 U$4 0 0$4 ~ $ M4 'Mo $ 44 VAaC d1 -1 0W '61 fa0 f1 %2 0110.W A. 44444Aa44 444 1241 41 $40 4" a"'44 041) rj A3 0S. 41 414a1~d4 )043 to V1 4) m.4'1 O , 43 tomt 41 O- 4) id...01. 0 C0' Go 41 aA1 -4 J4 D'4~. 0 MA. I440 adM 0' =4.4M gW 'W4 aA O 01~ AZ$4A4004

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