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Category:NPDES NONCOMPLIANCE NOTIFICATION
MONTHYEARRBG-44-543, NPDES Noncompliance Notification:On 980519,sample Was Inadvertently Missed During Discharge of 19,575 Gallons of Rejected Water from Demineralizer Unit.Caused by Infrequent Discharges.Will Reemphasize Notification Requirements1998-06-12012 June 1998 NPDES Noncompliance Notification:On 980519,sample Was Inadvertently Missed During Discharge of 19,575 Gallons of Rejected Water from Demineralizer Unit.Caused by Infrequent Discharges.Will Reemphasize Notification Requirements RBG-44321, NPDES Noncompliance Notification:On 971022,daily Average & Daily Max Pounds/Day Had Been Exceeded.Caused by Evolution Problems W/Sodium Hypochlorite & Ammonium Bisulfite Feed Systems.Addl Training Provided Re Maintaining Level Ranges1997-11-18018 November 1997 NPDES Noncompliance Notification:On 971022,daily Average & Daily Max Pounds/Day Had Been Exceeded.Caused by Evolution Problems W/Sodium Hypochlorite & Ammonium Bisulfite Feed Systems.Addl Training Provided Re Maintaining Level Ranges ML20211F2711997-09-23023 September 1997 NPDES Noncompliance Notification:On 970919,transformer Oil Spill Release Incident Occurred.Latico Environmental Svcs Arrived at Location to Assist W/Oil Spill Containment & Initiated Spill Cleanup.W/Laboratory Analysis Results RBG-43-933, NPDES Noncompliance Notification:On 970506 & 07 Several Unanticipated Bypasses of Station Circulating Water Sys Occurred.Caused by Manual Shutdown of Station.Secured CWS to Compensate for Decrease Demand for Makeup Water1997-05-12012 May 1997 NPDES Noncompliance Notification:On 970506 & 07 Several Unanticipated Bypasses of Station Circulating Water Sys Occurred.Caused by Manual Shutdown of Station.Secured CWS to Compensate for Decrease Demand for Makeup Water RBG-43-511, NPDES Noncompliance Notification:On 961016,drinking Water Samples Resulted in Tier 1 Bacteriological Mcl Violation. Caused by Contamination from Internal Tap or Plumbing Problem.Drinking Water Tap 5 Should Be Deleted1996-11-21021 November 1996 NPDES Noncompliance Notification:On 961016,drinking Water Samples Resulted in Tier 1 Bacteriological Mcl Violation. Caused by Contamination from Internal Tap or Plumbing Problem.Drinking Water Tap 5 Should Be Deleted ML20117H6741996-05-22022 May 1996 NPDES Noncompliance Notification:On 960515,unanticipated Bypass of Clarifier a Occurred.Caused by Isolation Valve Leaking by Seat.Temporary Diesel Pump Set Up to Divert Water from Valve Pit to Clarifier Splitter Box ML20077D5981994-12-0606 December 1994 NPDES Noncompliance Notification:On 941201 Ph Excursion Occurred at Outfall 004.Investigation Revealed Ph Meter Used at Facility Not Operating Correctly.Tap Water Added to Sand Filter Influent & Sodium Bicarbonate to Treatment Tanks ML20077D5111994-12-0606 December 1994 NPDES Noncompliance Notification:On 941201,pH Excursion Occurred at Outfall 004.Investigation Revealed That Ph Meter Used Not Operating Correctly.Tap Water Added to Sand Filter Influent & Sodium Bicarbonate Added to Treatment Tanks ML20078L6561994-11-21021 November 1994 NPDES Noncompliance Notification:On 941116,sewage Leak Excursion Occurred Due to Vehicle Struck Capped 4-inch PVC vent/clean-out Pipe Connected to Sewage Line Serving Restroom Facility ML20078L6501994-11-21021 November 1994 NPDES Noncompliance Notification:On 941116,sewage Leak Excursion Occurred When Vehicle Struck Capped 4-inch PVC vent/clean-out Pipe Connected to Sewage Line Serving Restroom Facility ML20065N4951994-04-15015 April 1994 NPDES Noncompliance Notification:On 940404,noted Discharge Excursion at Outfall 002.Caused by Lube Oil Purification Sys Seal Leak to Floor Drain.Inspected Floor Drain Sumps & Picking Up Visible Oil W/Absorbant Materials RBG-39-308, NPDES Noncompliance Notification:On 931030,discovered Permit Excursion for Outfall 004 of 1918 Fecal Coliform Colonies Per 100 Milliliters of Effluent in Quarterly Compliance Monitoring Sample1993-11-0404 November 1993 NPDES Noncompliance Notification:On 931030,discovered Permit Excursion for Outfall 004 of 1918 Fecal Coliform Colonies Per 100 Milliliters of Effluent in Quarterly Compliance Monitoring Sample ML20044C3781993-03-16016 March 1993 NPDES Noncompliance Notification:On 930308,wastewater Treatment Operator Discovered Overflow of Equalization Tank. Caused by Malfunctioning Urinals/Toilets in Bldgs Not Occupied Overnight.Flow Indicating Equipment Installed RBG-33167, NPDES Noncompliance Notification:On 900625,sodium Hypochlorite Spill Occurred at Plant.Caused by Crack in Thermoplastic Hypochlorite Storage Tank.Plastic Tank Removed from Svc & Sys Used for Continuous Chlorination Modified1990-07-0606 July 1990 NPDES Noncompliance Notification:On 900625,sodium Hypochlorite Spill Occurred at Plant.Caused by Crack in Thermoplastic Hypochlorite Storage Tank.Plastic Tank Removed from Svc & Sys Used for Continuous Chlorination Modified ML20005F4081990-01-0202 January 1990 NPDES Noncompliance Notification:On 891228,unauthorized Discharge Resulted in Brief Ph Excursion in Outfall 006. Excursion Caused by Leak of Dilute Sulfuric Acid from Waste Water Neutralization Sys Pipe.Leak Isolated Immediately RBG-31452, NPDES Noncompliance Notification:On 890628,severe Storm Caused Estimated 30,000 Gallons of partially-treated Sanitary Wastewater to Overflow from 0.25 Acre Facultative/ Anaerobic Polishing Pond Normally Producing Outfall 0051989-08-31031 August 1989 NPDES Noncompliance Notification:On 890628,severe Storm Caused Estimated 30,000 Gallons of partially-treated Sanitary Wastewater to Overflow from 0.25 Acre Facultative/ Anaerobic Polishing Pond Normally Producing Outfall 005 RBG-31359, Followup NPDES Noncompliance Notification:On 890724, Total Suspended Solids at Outfall 002 in Violation.Util Determined Cause to Be Leak Which Introduced Gallons of Sulfuric Acid Into Sys Sump.Analysis Underway1989-08-15015 August 1989 Followup NPDES Noncompliance Notification:On 890724, Total Suspended Solids at Outfall 002 in Violation.Util Determined Cause to Be Leak Which Introduced Gallons of Sulfuric Acid Into Sys Sump.Analysis Underway RBG-31319, NPDES Noncompliance Notification:On 890727,total Residual Chlorine Concentration in Effluent Exceeded Limit.Caused by Improper Balance of Hypochlorite Tablet Dosage & Flows. Engineering Design of Entire Treatment Sys to Be Performed1989-08-0202 August 1989 NPDES Noncompliance Notification:On 890727,total Residual Chlorine Concentration in Effluent Exceeded Limit.Caused by Improper Balance of Hypochlorite Tablet Dosage & Flows. Engineering Design of Entire Treatment Sys to Be Performed RBG-31280, NPDES Noncompliance Notification:On 890719,estimated 22,250 Gallons Wastewater Released.Cause of Excursion Unknown.Util Continuing Investigation Into Exact Cause of Total Suspended Solids & Will Provide Further Info in Subsequent Ltr1989-07-24024 July 1989 NPDES Noncompliance Notification:On 890719,estimated 22,250 Gallons Wastewater Released.Cause of Excursion Unknown.Util Continuing Investigation Into Exact Cause of Total Suspended Solids & Will Provide Further Info in Subsequent Ltr RBG-31212, NPDES Noncompliance Notification:On 890630,duplicative Samples of Effluent from Outfall 005 Yielded Average Total Residual Chlorine of 5.9 mg/1,in Violation of Permitted Max of 2.0 mg/1.Caused by Improper Balance of Hypochlorite1989-07-0505 July 1989 NPDES Noncompliance Notification:On 890630,duplicative Samples of Effluent from Outfall 005 Yielded Average Total Residual Chlorine of 5.9 mg/1,in Violation of Permitted Max of 2.0 mg/1.Caused by Improper Balance of Hypochlorite RBG-31205, NPDES Noncompliance Notification:On 890628,bypass & Limitation Violations Found.Caused by Storms.Bypass of Filter Initiated,Establishing Flow of About 37 Gpm Through Three Available Package Plants1989-07-0303 July 1989 NPDES Noncompliance Notification:On 890628,bypass & Limitation Violations Found.Caused by Storms.Bypass of Filter Initiated,Establishing Flow of About 37 Gpm Through Three Available Package Plants RBG-31206, NPDES Noncompliance Notification:On 890628,bypass & Limitation Violations Found.Caused by Storms.Bypass of Filter Initiated,Establishing Flow of About 37 Gpm Through Three Available Package Plants1989-07-0303 July 1989 NPDES Noncompliance Notification:On 890628,bypass & Limitation Violations Found.Caused by Storms.Bypass of Filter Initiated,Establishing Flow of About 37 Gpm Through Three Available Package Plants RBG-31154, NPDES Noncompliance Notification:On 890621,sample Collected from Outfall 004 Contained 2.5 mg/1 Total Residual Chlorine. Caused by Drawing Sample in Brief Interval Before Flows Stabilized Relative to Hypochlorite Dose Rates1989-06-26026 June 1989 NPDES Noncompliance Notification:On 890621,sample Collected from Outfall 004 Contained 2.5 mg/1 Total Residual Chlorine. Caused by Drawing Sample in Brief Interval Before Flows Stabilized Relative to Hypochlorite Dose Rates RBG-31040, NPDES Noncompliance Notification:On 890529,estimated 250 Gallons of Oil Escaped Containment.Caused by Apparent Short Circuit Causing Explosion & Fire at Large Transformer. Cleanup Completed on 890321 W/Oily Matls Disposed of1989-06-0606 June 1989 NPDES Noncompliance Notification:On 890529,estimated 250 Gallons of Oil Escaped Containment.Caused by Apparent Short Circuit Causing Explosion & Fire at Large Transformer. Cleanup Completed on 890321 W/Oily Matls Disposed of RBG-30536, NPDES Noncompliance Notification:On 890410 & 11,effluent Limitations for Outfall 004 Exceeded Limits.Caused by Inability to Effectively Adjust Chlorine Dosage W/ Fluctuating Flows & Oxidant Demand1989-04-14014 April 1989 NPDES Noncompliance Notification:On 890410 & 11,effluent Limitations for Outfall 004 Exceeded Limits.Caused by Inability to Effectively Adjust Chlorine Dosage W/ Fluctuating Flows & Oxidant Demand RBG-30513, NPDES Noncompliance:On 890406,effluent Limitations for Total Residual Chlorine in Outfall 004 Exceeded Permit Limits. Caused by Inability to Adjust Chlorine Dosage within Fluctuating Flow & Oxidant Demand1989-04-11011 April 1989 NPDES Noncompliance:On 890406,effluent Limitations for Total Residual Chlorine in Outfall 004 Exceeded Permit Limits. Caused by Inability to Adjust Chlorine Dosage within Fluctuating Flow & Oxidant Demand RBG-30384, NPDES Noncompliance Notification:On 890316,sample Collected Exceeded Effluent Limitations for Total Residual Chlorine. Caused by Inability to Adjust Chlorine Dosage W/Effluent of Fluctuating flow.Long-term Solution in Progress1989-03-21021 March 1989 NPDES Noncompliance Notification:On 890316,sample Collected Exceeded Effluent Limitations for Total Residual Chlorine. Caused by Inability to Adjust Chlorine Dosage W/Effluent of Fluctuating flow.Long-term Solution in Progress RBG-30321, NPDES Noncompliance Notification:On 890309,sample Collected Contained 0.6 mg/1 Total Residual Chlorine at Outfall 004. Caused by Inability to Adjust Chlorine Dosage W/Fluctuating Flow & Variable Quality.Engineering Study Underway1989-03-14014 March 1989 NPDES Noncompliance Notification:On 890309,sample Collected Contained 0.6 mg/1 Total Residual Chlorine at Outfall 004. Caused by Inability to Adjust Chlorine Dosage W/Fluctuating Flow & Variable Quality.Engineering Study Underway ML19332D0581989-02-0808 February 1989 Informs of Results of Investigation of Leaking Underground Storage Tank Sys at Plant,Originally Reported on 881111. Sketches Showing Configuration of Underground Storage Tank Sys,Soil Sampling Locations & Soil Contamination Encl RBG-29028, NPDES Noncompliance Notification:On 880907 & 22,high Values for Outfall 004 Noted.Both Excursions Caused by Lack of Familiarity W/New Type of Hypochlorite Tablets.Investigation Initiated to Determine If Changes in Design Warranted1988-10-14014 October 1988 NPDES Noncompliance Notification:On 880907 & 22,high Values for Outfall 004 Noted.Both Excursions Caused by Lack of Familiarity W/New Type of Hypochlorite Tablets.Investigation Initiated to Determine If Changes in Design Warranted RBG-28874, NPDES Noncompliance Notification:On 880917,sample from Outfall 001,cooling Tower Blowdown,Indicated Ph of 3.1 Su. Caused by Pumping of Sulfuric acid-contaminated Rainwater Into Circulating Water Flume.More Stringent Controls Added1988-09-22022 September 1988 NPDES Noncompliance Notification:On 880917,sample from Outfall 001,cooling Tower Blowdown,Indicated Ph of 3.1 Su. Caused by Pumping of Sulfuric acid-contaminated Rainwater Into Circulating Water Flume.More Stringent Controls Added RBG-27822, NPDES Noncompliance Notification:On 880504,analysis of Sample Indicated Exceeded Oil & Grease Concentration. Screening Analysis Will Continue Until Util Investigation Identifies Cause & Appropriate Corrective Measures1988-05-0909 May 1988 NPDES Noncompliance Notification:On 880504,analysis of Sample Indicated Exceeded Oil & Grease Concentration. Screening Analysis Will Continue Until Util Investigation Identifies Cause & Appropriate Corrective Measures RBG-27569, NPDES Noncompliance Notification:On 880310,analysis of Sample Collected Indicated Total Residual Chlorine of Less than 0.1 mg/1 Resulting in 5 H of Noncompliance.Caused by Higher Flow Associated W/Rainfall1988-03-15015 March 1988 NPDES Noncompliance Notification:On 880310,analysis of Sample Collected Indicated Total Residual Chlorine of Less than 0.1 mg/1 Resulting in 5 H of Noncompliance.Caused by Higher Flow Associated W/Rainfall RBG-27149, NPDES Noncompliance Notification:On 871210,estimated Flow of 500 Gpm of Cooling Water Discovered to Be Overflowing from Two Cooling Towers.No Specific Cause Identified.Third Cooling Tower Placed in Svc1987-12-15015 December 1987 NPDES Noncompliance Notification:On 871210,estimated Flow of 500 Gpm of Cooling Water Discovered to Be Overflowing from Two Cooling Towers.No Specific Cause Identified.Third Cooling Tower Placed in Svc RBG-27029, NPDES Noncompliance Notification:On 871111,sample from Outfall 2 Indicated 24 Mg/L Oil & Grease.Cause Under Investigation.Preventive Measures Will Be Implemented When More Info Available1987-11-20020 November 1987 NPDES Noncompliance Notification:On 871111,sample from Outfall 2 Indicated 24 Mg/L Oil & Grease.Cause Under Investigation.Preventive Measures Will Be Implemented When More Info Available RBG-25181, NPDES Noncompliance Notification:On 861229,overflow of Temporary Sludge Holding Area Discovered.Caused by Diversion of Stream Due to Malfunctioning Pumps in Sludge Return Sys. Use of Temporary Holding Area Discontinued1987-01-0505 January 1987 NPDES Noncompliance Notification:On 861229,overflow of Temporary Sludge Holding Area Discovered.Caused by Diversion of Stream Due to Malfunctioning Pumps in Sludge Return Sys. Use of Temporary Holding Area Discontinued RBG-24627, NPDES Noncompliance Notification:On 861024,analysis Sample Collected Indicated Total Suspended Solids of 150 Mg/L, Exceeding Permitted Limit.Caused by Intrusion of silt-laden Stormwater.Discharge Stopped Until Stormwater Diverted1986-10-29029 October 1986 NPDES Noncompliance Notification:On 861024,analysis Sample Collected Indicated Total Suspended Solids of 150 Mg/L, Exceeding Permitted Limit.Caused by Intrusion of silt-laden Stormwater.Discharge Stopped Until Stormwater Diverted RBG-24571, NPDES Noncompliance Notification:On 861007,failure of Sludge Return Pump Threatened to Flood Pump Well.Sludge Pumped from Well to Ground.Approx 3,000 Gallons Reached Storm Drain Leading to Outfall 0061986-10-14014 October 1986 NPDES Noncompliance Notification:On 861007,failure of Sludge Return Pump Threatened to Flood Pump Well.Sludge Pumped from Well to Ground.Approx 3,000 Gallons Reached Storm Drain Leading to Outfall 006 RBG-23-851, NPDES Noncompliance Notification:On 860605 Daily Average Temp at Outfall 001 Was 92 F Vs Permitted Limit of 91 F. Possible Causes Being Assessed.Surveillance of Blowdown Temp Increased to Prevent Recurrence1986-06-10010 June 1986 NPDES Noncompliance Notification:On 860605 Daily Average Temp at Outfall 001 Was 92 F Vs Permitted Limit of 91 F. Possible Causes Being Assessed.Surveillance of Blowdown Temp Increased to Prevent Recurrence RBG-23-850, NPDES Noncompliance Notification:On 860605,08 & 09,cooling Towers Oveflowed.Caused by Makeup Water Valve Sticking & When Cooling Tower Blowdown Secured Due to High Temps. Measures to Prevent Recurrence Under Evaluation1986-06-10010 June 1986 NPDES Noncompliance Notification:On 860605,08 & 09,cooling Towers Oveflowed.Caused by Makeup Water Valve Sticking & When Cooling Tower Blowdown Secured Due to High Temps. Measures to Prevent Recurrence Under Evaluation RBG-23-657, NPDES Noncompliance Notification:On 860505,plant Cooling Towers Overflowed.Caused by Sharp Increase in Cooling Water Due to Loss of Heat Load Precipitated by Shutdown.Water Discharged Through Yard Drains1986-05-0909 May 1986 NPDES Noncompliance Notification:On 860505,plant Cooling Towers Overflowed.Caused by Sharp Increase in Cooling Water Due to Loss of Heat Load Precipitated by Shutdown.Water Discharged Through Yard Drains RBG-22974, NPDES Noncompliance Notification:On 860103,analysis Indicated Total Suspended Solids of 37 mg/1 at Outfall 001. Caused by High Algal Concentrations.Discharge at Outfall 001 Stopped Until Problem Resolved1986-01-13013 January 1986 NPDES Noncompliance Notification:On 860103,analysis Indicated Total Suspended Solids of 37 mg/1 at Outfall 001. Caused by High Algal Concentrations.Discharge at Outfall 001 Stopped Until Problem Resolved 1998-06-12
[Table view] Category:TEXT-ENVIRONMENTAL REPORTS
MONTHYEARML20196K7661998-12-31031 December 1998 Rbs,Unit 1 Annual Occupational Radiation Exposure Rept for 1998 RBG-44980, Radiological Environ Operating Rept for River Bend Station for Operating Period 980101-1231. with1998-12-31031 December 1998 Radiological Environ Operating Rept for River Bend Station for Operating Period 980101-1231. with RBG-44741, Annual Non-Radiological Environ Operating Rept for 970829-980828. with1998-08-28028 August 1998 Annual Non-Radiological Environ Operating Rept for 970829-980828. with RBG-44-543, NPDES Noncompliance Notification:On 980519,sample Was Inadvertently Missed During Discharge of 19,575 Gallons of Rejected Water from Demineralizer Unit.Caused by Infrequent Discharges.Will Reemphasize Notification Requirements1998-06-12012 June 1998 NPDES Noncompliance Notification:On 980519,sample Was Inadvertently Missed During Discharge of 19,575 Gallons of Rejected Water from Demineralizer Unit.Caused by Infrequent Discharges.Will Reemphasize Notification Requirements ML20217P9651997-12-31031 December 1997 Annual Radioactive Effluent Release Rept,For Period Jan-Dec 1997 ML20217P2621997-12-31031 December 1997 Annual Occupational Radiation Exposure for 1997 RBG-44321, NPDES Noncompliance Notification:On 971022,daily Average & Daily Max Pounds/Day Had Been Exceeded.Caused by Evolution Problems W/Sodium Hypochlorite & Ammonium Bisulfite Feed Systems.Addl Training Provided Re Maintaining Level Ranges1997-11-18018 November 1997 NPDES Noncompliance Notification:On 971022,daily Average & Daily Max Pounds/Day Had Been Exceeded.Caused by Evolution Problems W/Sodium Hypochlorite & Ammonium Bisulfite Feed Systems.Addl Training Provided Re Maintaining Level Ranges ML20211F2711997-09-23023 September 1997 NPDES Noncompliance Notification:On 970919,transformer Oil Spill Release Incident Occurred.Latico Environmental Svcs Arrived at Location to Assist W/Oil Spill Containment & Initiated Spill Cleanup.W/Laboratory Analysis Results ML20199K9621997-08-29029 August 1997 RBS Environmental Operating Rept for Period 960829-970828 RBG-43-933, NPDES Noncompliance Notification:On 970506 & 07 Several Unanticipated Bypasses of Station Circulating Water Sys Occurred.Caused by Manual Shutdown of Station.Secured CWS to Compensate for Decrease Demand for Makeup Water1997-05-12012 May 1997 NPDES Noncompliance Notification:On 970506 & 07 Several Unanticipated Bypasses of Station Circulating Water Sys Occurred.Caused by Manual Shutdown of Station.Secured CWS to Compensate for Decrease Demand for Makeup Water RBG-43844, Radiological Environ Operating Rept for River Bend Station 960101-12311996-12-31031 December 1996 Radiological Environ Operating Rept for River Bend Station 960101-1231 RBG-43809, Annual Occupational Radiation Exposure Rept for 19961996-12-31031 December 1996 Annual Occupational Radiation Exposure Rept for 1996 ML20140F0091996-12-31031 December 1996 Annual Effluent Release Rept for Jan-Dec 1996 RBG-43-511, NPDES Noncompliance Notification:On 961016,drinking Water Samples Resulted in Tier 1 Bacteriological Mcl Violation. Caused by Contamination from Internal Tap or Plumbing Problem.Drinking Water Tap 5 Should Be Deleted1996-11-21021 November 1996 NPDES Noncompliance Notification:On 961016,drinking Water Samples Resulted in Tier 1 Bacteriological Mcl Violation. Caused by Contamination from Internal Tap or Plumbing Problem.Drinking Water Tap 5 Should Be Deleted ML20135C1861996-08-28028 August 1996 Annual Environ Operating Rept (Nonradiological) 950829- 960828 ML20117H6741996-05-22022 May 1996 NPDES Noncompliance Notification:On 960515,unanticipated Bypass of Clarifier a Occurred.Caused by Isolation Valve Leaking by Seat.Temporary Diesel Pump Set Up to Divert Water from Valve Pit to Clarifier Splitter Box ML20101K2401995-12-31031 December 1995 Annual Occupational Radiation Exposure Rept for 1995 ML20108B5601995-12-31031 December 1995 Annual Radioactive Effluent Release Rept Jan-Dec 1995 RBG-42851, Radiological Environ Operating Rept,River Bend Station for Operating Period,Jan-Dec 19951995-12-31031 December 1995 Radiological Environ Operating Rept,River Bend Station for Operating Period,Jan-Dec 1995 RBG-43185, Radiological Environ Operating Rept (Amended) River Bend Station Jan-Dec 19951995-12-31031 December 1995 Radiological Environ Operating Rept (Amended) River Bend Station Jan-Dec 1995 ML20094P5541995-08-28028 August 1995 Annual Environ Operating Rept (Nonradiological) for Period 940829-950828 ML20078N3581995-01-0606 January 1995 Evaluation of Proposed Wildlife Mgt Lake, Final Rept RBG-41285, Annual Radioactive Effluent Release Rept for Jan-Dec 19941994-12-31031 December 1994 Annual Radioactive Effluent Release Rept for Jan-Dec 1994 RBG-41459, Radiological Environ Operating Rept River Bend Station for Operating Period Jan-Dec 19941994-12-31031 December 1994 Radiological Environ Operating Rept River Bend Station for Operating Period Jan-Dec 1994 ML20077D5981994-12-0606 December 1994 NPDES Noncompliance Notification:On 941201 Ph Excursion Occurred at Outfall 004.Investigation Revealed Ph Meter Used at Facility Not Operating Correctly.Tap Water Added to Sand Filter Influent & Sodium Bicarbonate to Treatment Tanks ML20077D5111994-12-0606 December 1994 NPDES Noncompliance Notification:On 941201,pH Excursion Occurred at Outfall 004.Investigation Revealed That Ph Meter Used Not Operating Correctly.Tap Water Added to Sand Filter Influent & Sodium Bicarbonate Added to Treatment Tanks ML20078L6561994-11-21021 November 1994 NPDES Noncompliance Notification:On 941116,sewage Leak Excursion Occurred Due to Vehicle Struck Capped 4-inch PVC vent/clean-out Pipe Connected to Sewage Line Serving Restroom Facility ML20078L6501994-11-21021 November 1994 NPDES Noncompliance Notification:On 941116,sewage Leak Excursion Occurred When Vehicle Struck Capped 4-inch PVC vent/clean-out Pipe Connected to Sewage Line Serving Restroom Facility ML20080B3751994-08-28028 August 1994 Annual Environ Operating Rept (Nonradiological) for Period 930829-940828 ML20065N4951994-04-15015 April 1994 NPDES Noncompliance Notification:On 940404,noted Discharge Excursion at Outfall 002.Caused by Lube Oil Purification Sys Seal Leak to Floor Drain.Inspected Floor Drain Sumps & Picking Up Visible Oil W/Absorbant Materials RBG-40305, Annual Occupational Radiation Exposure 10CFR20 Rept, Personnel Whole Body Exposure for CY931993-12-31031 December 1993 Annual Occupational Radiation Exposure 10CFR20 Rept, Personnel Whole Body Exposure for CY93 RBG-40455, Annual Radioactive Effluent Release Rept Jan-Dec 19931993-12-31031 December 1993 Annual Radioactive Effluent Release Rept Jan-Dec 1993 RBG-40535, Radiological Environ Operating Rept River Bend Station for Operating Period Jan-Dec 19931993-12-31031 December 1993 Radiological Environ Operating Rept River Bend Station for Operating Period Jan-Dec 1993 RBG-39-308, NPDES Noncompliance Notification:On 931030,discovered Permit Excursion for Outfall 004 of 1918 Fecal Coliform Colonies Per 100 Milliliters of Effluent in Quarterly Compliance Monitoring Sample1993-11-0404 November 1993 NPDES Noncompliance Notification:On 931030,discovered Permit Excursion for Outfall 004 of 1918 Fecal Coliform Colonies Per 100 Milliliters of Effluent in Quarterly Compliance Monitoring Sample RBG-39459, Annual Environ Operating Rept (Nonradiological) for Period 920829-9308281993-08-28028 August 1993 Annual Environ Operating Rept (Nonradiological) for Period 920829-930828 ML20044C3781993-03-16016 March 1993 NPDES Noncompliance Notification:On 930308,wastewater Treatment Operator Discovered Overflow of Equalization Tank. Caused by Malfunctioning Urinals/Toilets in Bldgs Not Occupied Overnight.Flow Indicating Equipment Installed ML20045E0301992-12-31031 December 1992 Addendum to Semiannual Radioactive Effluent Release Rept for Jul-Dec 1992. RBG-37-774, Annual Environ Operating Rept (Nonradiological) for Period 910829-9208281992-08-28028 August 1992 Annual Environ Operating Rept (Nonradiological) for Period 910829-920828 RBG-37649, Addendum Semiannual Radioactive Effluent Release Rept for 920101 Through 9206301992-06-30030 June 1992 Addendum Semiannual Radioactive Effluent Release Rept for 920101 Through 920630 ML20114D0701992-06-30030 June 1992 Semi-Annual Radioactive Effluent Release Rept for 920101 Through 920630 RBG-36-769, Radiological Environ Operating Rept,River Bend Station for 19911991-12-31031 December 1991 Radiological Environ Operating Rept,River Bend Station for 1991 ML20094H1871991-12-31031 December 1991 Semiannual Radioactive Effluent Release Rept for Jul-Dec 1991 ML20113H6481991-12-31031 December 1991 Addendum to Semiannual Radioactive Effluent Release Rept for Jul-Dec 1991, Consisting of Info Re Radiological Impact on Man & Gaseous & Liquid Effluents RBG-36-035, Annual Environ Operating Rept for 900829-9108281991-08-28028 August 1991 Annual Environ Operating Rept for 900829-910828 ML20086G1561991-06-30030 June 1991 Addendum to River Bend Station Unit 1,Semiannual Radioactive Effluent Release Rept for Jan-June 1991 ML20094H2031991-06-30030 June 1991 Atmospheric Dispersion Factors for Second Quarter Apr-June 1991 ML20082L9991991-06-30030 June 1991 Semiannual Radioactive Effluent Release Rept Jan-June 1991 ML20094H1941991-03-31031 March 1991 Atmospheric Dispersion Factors for First Quarter Jan-Mar 1991 RBG-34-917, Radiological Environ Operating Rept,Jan-Dec 19901990-12-31031 December 1990 Radiological Environ Operating Rept,Jan-Dec 1990 ML20082F9011990-12-31031 December 1990 Addendum to River Bend Station Unit 1 Semiannual Radioactive Effluent Release Rept,Jul-Dec 1990 1998-08-28
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I GULF STATES UTILETIES COMPANY river BENO STAttON POST OFFICE BOX 220 51 FRANCISvtLLE. LOUISIANA 70775 AREA CODE 504 635 6094 346 8651 July 3, 1989 RBG-31205 File Nos. G1.11.2 Ms. Maureen O'Neill, Assistant Secretary Office of Water Resources Louisiana Department of Environmental Quality Post Office Box 44091, Capitol Station Baton Rouge, LA 70804-4091
Dear Ms. O'Neill:
Water Discharge Permit No. WP0409 River Bend Station - Unit 1 This letter is a follow-up to a telephone notification made at 3:55 p.m. on June 28, 1989, concerning unanticipated bypasses and associated effluent limitation violations at sanitary wastewater treatment system outfall regulated by Louisiana Water Discharge Permit No. WP0409.
Outfall 004 is " treated sanitary waste from power station to Grants Bayou,"
an effluent which normally is processed by one or a combination of up to four extended aeration package treatment plants followed by sand filtration. The total combined capacity of the package plants is 72,000 gallons per day (gpd), which was necessary at the height of construction in the mid-1980s. However, under the normal operating conditions of recent years flows have averaged less than 30,000 gpd with the bulk occurring during normal working hours of weekdays. One of the larger (25,000 gpd capacity) package plants has been isolated for aerobic digestion of sludge so that the existing (readily-available) system capacity is 47,000 gpd. By adjustment of weir plates in the equalization basin, the throughput is normally cut down to about 20,000 gpd for nights and then increased gradually as needed through the days.
Storms associated with Tropical Depression Allison generated almost five inches of rain at River Bend Station between 5:00 and 9:00 a.m. on June 28, 1989. With soils saturated and local streams already high from rains of preceding days, the morning deluge of the 28th caused brief but extreme flooding of areas which ordinarily drain well. When the operator arrived at the sewage treatment facility at about 6:00 a.m. he noticed abnormally high flows and, suspecting stormwater intrusion, made adjustments to establish maximum throughput capacity of 47,000 gpd. It soon was evident, iiowever, that the hydraulic surge was disrupting the sludge blanket in one package plant, threatening carry-over that would disable the sand filter.
He then contacted environmental personnel to inform them of the need to bypass the filter. At 8:30 a.m. bypass of the filter was initiated, establishing a flow of about 37 gallons per minute (gpm) through the three 8907230250 s90703 PDR ff s ADOCK 05000458 puu . {'d 9
e 0'Neili Page 2 available package plants. This was sufficiently greater than the total available capacity (about 33 gpm) to cause " lifting" of the sludge in one package plant to persist. In consultation with environmental personnel it was decided that diversion of a small amount of the high-diluted influent
(" raw" sewage) was preferable to allowing extensive sludge carry-over.
Thus, at about 9:00 a.m. flows from the equalization basin to the package plants were cut back slightly, causing an estimated 4gpm of wastewater to bypass treatment completely. The latter continued it a gradually decreasing rate until 11:00 a.m.; thus we estimate that a worst-case total volume could have been as much as 1,000 gallons. The bypass of partially treated wastewater around the sand filter was secered at noon, with the resulting total flow over 3.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> measured at 7,833 gallons..
Grab samples of the respective bypass effluents were collected at 9:25 a.m.
, The partially treated water met total residual chlorine (TRC) and pH
( limits, but contained 312 mg/l of total suspended solids (TSS) in violation of the maximum limitation of 45 mg/1. The completely untreated effluent met pH limits, but contained no TRC in violation of the required minimum of 0.8 mg/l and had a TSS concentration of 235 mg/1. Results of analyses for biochemical oxygen demand (80Dg) are as yet unavailable; they will be provided in a subsequent letter if in violation of the 45 mg/l maximum limit or only included in the monthly Discharge Monitoring Report (DMR) if in compliance. We do not expect that the 80D 5 levels will be much, if any, higher than the maximum limit because most of the excess solids contributing to the high TSS levels appeared to be soil entrained by rain.
The stormwater intrusion was apparently due primarily to inundation of the open orifices of two sanitary sewer lines which had been disconnected from construction facilities. Some, of course, impinged directly as almost 5 inches of rain on the open equalization tank and package plants. The two abandoned sewer line orifices are situated in areas which normally do not flood even in high rainfall, or, if so, the duration of inundation is relatively brief. Both openings were obscured by structures and/or dense vegetation. Once the emergency adjustments had been made as described above at the treatment facility, personnel began searching for the source (s) of intrusion. One of the orifices was found fairly rapidly and plugged and the second was found a few hours later and. plugged. When the second opening was closed all obvious stormwater ceased entering the lift station involved.
To prevent recurrence of such problems we plan to permanently plug the two lines mentioned above and to verify by field investigation that they were indeed the only sources of intrusion.
Outfall 005 is " treated sanitary waste from training center to Grants Bayou," an effluent which normally is processed by a 15,000 gpd capacity extended aeration package treatment plant followed by passage through a t
0.25-acre facilitative/ anaerobic polishing pond. The pond is on a terrace overhanging the West Fork of Grants Bayou, and at the base of a steep slope from adjacent higher terrain. Diversion ditches normally shunt runoff from
2 0'Neill' Page 3 I
the slope around the pond, but are not adequate to handle extreme storm events.
By direct impingement on the pond surface and intrusion from the flooded diversion ditches, the storm event described above caused an estiraated 100 gpm of overflow from the pond to begin at about 8:00 a.m. This bypass continued at a gradually decreasing rate until about 1:00 p.m., allowing a worst-case total volume of up to 30,000 gallons of partially treated effluent to enter Grants Bayou.
Grab samples of treated and partially treated (bypassed) pond effluent were collected at 11:25 a.m. on June 28, 1989. The treated pond effluent met TSS, TRC, and pH limits. 0verflow from the pond met TSS and pH limits, but contained no TRC in violation of the minimum limit of 0.8 mg/1. As in the case of the Outfall 004 bypass, results of the as yet incomplete 800 analyses for Outfall 005 will be provided in a subsequent letter if ib violation or only included in the June DMR if in compliance.
To prevent recurrence of overflows at Outfall 005 we plan in the near-term to upgrade the capacity of the diversion ditches as much as practicable.
The entire treatment syste:n at Outfall 005 was the subject of a recent evaluation by consulting engineers. Results and recommendations of this study are being assessed by upper management to detennine the best long-term solution.
I certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information submitted, the information submitted is, to the best of my knowledge and belief, true, accurate and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations.
Sincerely, W. H. Odell (
Manager-Administrator w>L WH0/LAE/RJK/3WC/JVC/ch cc: Mr. Myron Knudson, P.E.
Director, Water Management Division (6W)
U. S. Environmental Protection Agency i Allied Bank Tower at Fountain Place j 1445 Ross Avenue l Dallas, TX 75202-2733 i
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I . CahitolRegionalOffice Water Pollution Control Division 11720 Airline Highway Baton Rouge, LA 70817-1720 U. 5. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 U.- S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington,.TX 76011
'NRC Resident Inspector Post Office Box 1051 St. Francisville,'LA 70775 I
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