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ML17326A11910 September 1999NPDES Noncompliance Notification:On 990909,unnatural Turbidity Was Observed at Cook Plant Outfall 001 & 002. Caused by Bentonite Clay Being Fed Into Discharge Vaults During Molluscicide Treatment.Terminated Clay FeedZebra Mussel
ML17326A0439 July 1999NPDES Noncompliance Notification:On 990707,unnatural Turbidity Was Observed at Outfall 002.Caused by Bentonite Clay Being Fed Into Discharge Vaults During Molluscicide Treatment.Clay Feed Was Terminated on 990708Zebra Mussel
ML17326A0429 July 1999NPDES Noncompliance Notification:On 990707,sample Taken Showed Residual Clam-Trol CT-2 Value of 0.17 Ppm.Caused by Interruption of Clay Feed to Unit 1 Discharge Vault.Valve Was Cleared & Clay Feed Was re-established
ML17335A14431 July 1998NPDES Noncompliance Notification:On 980623,ice-making Sys Discharge Line Developed Leak & Oversprayed Containment Spillings Approx 50 Gallons.Caused by Vibration & Wear Against Line.Discharge Line Supports Have Been Redesigned
ML17334B8168 July 1998NPDES Noncompliance Notification:On 980617,discovered Lube Oil Discharge.Caused by Leaking Tubes Due to Corrosion of Tubes.Leaking Tubes Repaired & Established Insp/Preventive Maint Program for Lube Oil Coolers
ML17334B75727 April 1998NPDES Noncompliance notification:980327,boiler Condensate Spill Occurred.Caused by Small Amount of Condensate on Metal Skirting Surrounding Containment Berm.Failed Condensate Valve Was Replaced
ML17334A68613 March 1998NPDES Noncompliance Notification:On 980209,boiler Condensate Spill Occurred.Caused by Failed Sight Glass on Rental Plant Heating Boiler.Replaced Site Glass & Installed Plexiglass Shield Around Site Glass to Protect Operators
ML17334A5889 December 1997NPDES Noncompliance Notification:On 971108 Plant Personnel Chlorination Sys Was Shut Down,Due to Valve Lineup Error Made During Startup of Continuous Chlorination After Shutdown.Corrected Lineup & Repositioned Valve
ML17333A38813 March 1996NPDES Noncompliance Notification:On 960310,continuous Ph Monitoring of Outfall 00D(turbine Room Sump)Interrupted. Caused by Electronic Failure of Monitoring Instrumentation. Grab Samples Performed & Monitor Recalibrated on 960311Grab sample
ML17333A38728 February 1996NPDES Noncompliance Notification:On 960226,continuous Ph Monitoring of Outfall 00D(Turbine Room Sump) Interrupted. Caused by Fouling of Ph Instrumentation Glass Electrode. Electrode Cleaned & Ph Monitor Returned to Svc
ML17332A97921 September 1995NPDES Noncompliance Notification:On 950916,unnatural Turbidity Observed at Plant Outfalls 001 & 002 During Molluscicide Treatment at Plant.Preventive Actions Not Possible Due to Detoxificaion Requirements in NPDES PermitZebra Mussel
ML17332A9558 September 1995NPDES Noncompliance Notification:On 950829,hydraulic Oil Spill Occurred While Divers Using Hydraulic Brushes to Remove Zebra Mussels from Plant Screenhouse Intake Forebay Walls.Oil Absorbent Booms Deployed Into ForebayZebra Mussel
ML17332A9547 September 1995NPDES Noncompliance Notification:On 950831,determined That Discharge from Outfall 00C (Heating Boiler Blowdown) Exceeded Concentration of Monethanolamine Submitted in NPDES Application Due to Valve Being Aligned in Open Position
ML17332A8308 June 1995NPDES Noncompliance Notification:On 950530,spill of Ethylene Glycol Occurred When Contracted Svc Technician Troubleshooting Portable Welding Machine.Ethylene Glycol Coolant Replaced W/Propylene Glycol Coolant
ML17332A69923 March 1995NPDES Noncompliance Notification:On 950205 to 16,33 Wild Ducks Entrained in Intake Cribs & Subsequently Collected on Intake Screens within Screenhouse.Suspect Ducks Entrained While Feeding on Zebra MusselsZebra Mussel
ML17332A69620 March 1995NPDES Noncompliance Notification:On 950301,bypass Discharge from Turbine Room Sump Through Emergency Over Flow Piping Into Intake Forebay to Lake Michigan
ML17331B33130 March 1994NPDES Noncompliance Notification:On 940303,determined HVAC Sys Leaking Water Containing Approx 1,000 Mg/Liter Sodium Nitrite at Calculated Rate of 0.5 Gpm
ML17331A8848 June 1993NPDES Noncompliance Notification:On 930526 Chlorine Exceedance Incorrectly Stated Event Occurred on May 21 Instead of Actual Date of May 19.Licensee Apologizes for Inconvenience Error May Have Caused
ML17331A12524 March 1993NPDES Noncompliance Notification:On 930322,plant Personnel Discovered Small Oil Sheen at North Storm Water Outfall 001S.Oil Residue from Parking Lot Gradually Entered Lake Michigan.Oil Absorbent Booms in Place at Outfall
ML17329A68212 November 1992NPDES Noncompliance Notification:On 921109,review of Records Determined That First Quarter 1992 Samples for Stormwater Outfall 001S Not Collected.Quarterly Sampling Requirement Added to Computerized Tracking Sys
ML17329A5522 July 1992NPDES Noncompliance Notification:On 920630,minor Inadvertent Discharge of Treatment Chemical Clam-trol CT-1 May Have Occurred.Fire Protection Clam-trol Treatment Was Suspended Immediately & Will Not Be Resumed Until Alterations MadeZebra Mussel
ML17329A54829 June 1992NPDES Noncompliance Notification:On 920624,grab Sample of Outfall 002 Circulating Water Discharge Indicated TRC Concentration of 0.33 mg/1.Caused by Flow Balance Between Plant Sys.Unit 1 in Shutdown ConditionGrab sample
ML17329A54010 June 1992NPDES Noncompliance Notification:On 920606,grab Sample of Outfall 002 Circulating Water Discharge Indicated Total Residual Chlorine Above Timits.Caused by Manfunctioning Svc Water Flow Meter.Flow Meter Will Be ReplacedGrab sample
ML20086T9913 January 1992Noncompliance Notification:On 911219,approx 400 Diving Ducks Collected in Circulating Water Sys Screenwash Baskets.Caused by Abundant Food Supply Provided by Circulating Water Discharge.Flow Rates ReducedZebra Mussel
ML17329A32310 December 1991NPDES Noncompliance Notification:On 911129,discovered That HX Associated W/Component Cooling Water Sys Leaking & Drop in Sys Surge Tank Level Occurred.Approx 5,300 Gallons of Water Leaked from Sys.Hx Isolated for Repairs
ML17329A09611 July 1991Final NPDES Notification Re Exceeding Heat Addition Effluent Limitation on 910701-05 on Outfall 001 & 002. Cause Under Investigation.Power Reduction Initiated on 910705 to Meet Limitations
ML17328B0099 April 1991NPDES Noncompliance Notification:On 910327,automatic Temp Recorder for Outfall 001 Failed & No Temp Measurements Recorded from 910328-31.Plant Procedures Will Be Revised to Describe Compensatory Sampling Measures in Event of Failure
ML17334B39626 February 1991NPDES Noncompliance Notification:On 910220 & 21,unmonitored Discharges Occurred from Turbine Room Sump.Caused by Inoperable Ph Meter.Turbine Sump Room Isolated & Job Order Written to Repair Meter
ML17328A76430 October 1990NPDES Noncompliance Notification:On 901025,five Unmonitored Discharges from Turbine Room Sump Occurred Releasing 250,000 Gallons of Water.Caused by Downstream Blockage of Flow to TRS Sample Line.In Interim,Ph Sampling Performed
ML17325B3317 November 1989Notifies That Total Recoverable Petroleum Hydrocarbons Sample Collected on 891006 Contained 0.9 mg/1 Trph.Util Believes Amount to Be Anomalous Value
ML17326B5709 March 1989NPDES Noncompliance Notification:Prefilter Backwash Limitations Exceeded for Feb 1989.Plan to Ensure Future Compliance W/Npdes Permit Requirements Will Be Submitted to Plainwell District Ofc
ML17326B5546 March 1989NPDES Noncompliance Notification:On 890224,leak Found in Main Turbine Lubricating Oil Coolers.Cause Not Stated. Leaking Cooler Isolated & Tube Plugged & Eddy Current Testing Performed to Determine Integrity of Remaining Tubes
ML17326B49818 November 1988NPDES Noncompliance Notification:On 881114,sample of Prefilter Backwash Effluent (Outfall 00F) Analyzed for Suspended Solids & Indicated 171 mg/1.Rough Lake Conditions Stirred Bottom Sediments Coming Into Plant Intake Water
ML17326B4947 November 1988NPDES Noncompliance Notification:On 881031,prefilter Backwash Discharge (Outfall 00F) Indicated Suspended Solids Concentration of 138 Mg/L
ML17325A9815 October 1988NPDES Noncompliance Notification:On 880919,water Makeup Prefilter Backwash Sample Exceeded Limitations.Caused by High Solids in Intake from Lake Michigan.Plant Personnel Reminded About Need to Evaluate & Rept Analyses Promptly
ML17325A92913 September 1988NPDES Noncompliance Notification:On 880910,Unit 1 Discharged Taken During Circulating Water Chlorination Showed Chlorine Concentration of 0.135 Mg/L.Caused by Temporary Reduced Water Flow Through Sys.Pump Chlorine Feed ReducedGrab sample
ML17325A84415 June 1988NPDES Noncompliance Notification:On 880602,oil Spill of Approx 300 Gallons from Underground Storage Tank Occurred. Cleanup & Recovery Measures Underway.Repairs Will Be Made to Leak Area.Cleanup Will Be Completed by 880617
ML17325A49123 November 1987NPDES Noncompliance Notification:On 871117,analysis of Grab Sample of Unit Discharge Taken During Circulating Water Chlorination Showed Total Residual Chlorine Concentration Above Limits.Caused by Vibration Causing Valve to CloseGrab sample
ML17325A29614 September 1987NPDES Noncompliance Notification:On 870901,spill from Turbine Room Sump,Outfall 00D Occurred.Approx 9,000 Gallons of Water Overflowed to Lake Michigan.Grab Sample Indicated Ph of 6.57 & No Trace of Oil & Grease.Caused by RepairsGrab sample
ML17325A26811 August 1987NPDES Noncompliance Notification:On 870805,chlorination of Circulating Water Commenced Due to Biological Fouling.Total Residual Chlorine Levels Recorded on 870805,08 & 09 Listed
ML17334B1166 July 1987NPDES Noncompliance Notification:On 870630,monitoring Turbine Room Sump Process Ph Meter Found to Be Inoperative. Turbine Room Sump May Have Discharged to Absorption Pond During Previous 5 H W/O Continuous MonitoringGrab sample
ML17325A08327 April 1987NPDES Noncompliance Notification:On 870410,oil Entered Yard Drain When Pressurized Tank Sprayed Out 10 Gallons Number 2 Fuel Oil During Attempt to Measure Level in east-middle Heating Boiler Fuel Oil Tank.Cleanup Began Immediately
ML20213G98914 November 1986NPDES Noncompliance Notification:On 861107,recording Instrument from Which Circulating Water Intake & Discharge Temps Obtained Failed.Caused by Faulty servo-motor.Recording Instrument Repaired & Returned to Svc
ML20214P9969 September 1986Corrected NPDES Noncompliance Notification:On 860903,turbine Room Sump Overflowed Into Circulating Water Sys Intake Forebay.Caused by Airlocked Suction Lines.Grab Sample Taken. Condition Rept Will Determine Corrective ActionGrab sample
ML17324A99814 July 1986NPDES Noncompliance Notification:On 860709,discovered That Grab Sample for Suspended Solids Not Obtained for Steam Generator Blowdown During 860629 Startup.Blowdown Sys Used for Weekly Sampling FrequencyGrab sample
ML20211K51319 June 1986NPDES Noncompliance Notification:On 860616,during Draining & Cleaning Steam Generators,Suspended Solids Sample from Startup Blowdown Flash Tank Revealed Concentration of 172 Ppm.Probably Caused by Boric AcidBoric Acid
ML20205S8492 June 1986NPDES Noncompliance Notification:On 860528,w/both Nuclear Units Out of Svc,Heating Boiler Started.Blowdown Sample Had Suspended Solids Concentration of 129.Caused by Chemical Shock
ML17321A94124 October 1985NPDES Noncompliance Notification:On 851023,sample Taken of Suspended Solids Concentration Elevated.Caused by Chemical Shock Due to Batch Addition of Chemical Treatment
ML20198A86324 October 1985NPDES Noncompliance Notification:On 851019,steam Generator Found to Have Suspended Solids Concentration of 2,442 Ppm. Caused by Recent Steam Generator Cleaning
ML20138N62724 October 1985NPDES Noncompliance Notification:On 850716,plant Heating Boiler Started While Both NSSS Out of Svc.Blowdown Sample Taken on 851022,contained Suspended Solids Concentration of 169 Ppm.On 851023,sample Contained 195 Ppm
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