Semi-Annual Report 2020-2 July 1, 2020 Through December 31, 2020
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Semi-Annual Report 2020-2 July 1, 2020 through December 31, 2020 March 1, 2021 City-County Administration Building 1 NW Martin Luther King Blvd Evansville, Indiana 47708 SUBMITTAL AUTHORIZATION Approved By: March 1, 2021 Date I certify under penalty of law that I have examined and am familiar with the information submitted in this document and all attachments and that this document and its attachments were prepared under my direction or supervision in a manner designed to ensure that qualified and knowledgeable personnel properly gather and present the information contained therein. I further certify, based on my inquiry of those individuals immediately responsible for obtaining the information, that I believe that the information is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fines and imprisonment. Table of Contents Table of Contents ................................................................................................................ VII Acronyms and Abbreviations ................................................................................................ IX 1 Introduction ............................................................................................................1-1 1.1 Reporting Period Overview ........................................................................ 1-2 2 Dry Weather Overflows ...........................................................................................2-1 3 SSO and CSS Release Documentation and Reporting ................................................3-1 3.1 SSO and CSS Releases ................................................................................. 3-1 3.2 Recurring Overflows .................................................................................. 3-1 3.3 Discharges to Water Bodies ........................................................................ 3-1 3.4 Remedial Actions to Mitigate SSOs and CSS Releases .................................. 3-1 4 Installation of Overflow Alarms at Pump Stations ....................................................4-1 5 Revisions to CSO Operational Plan ...........................................................................5-1 6 Maximizing Existing Flow and Storage Capacity of the Sewer Systems ......................6-1 6.1 CSO Discharges when WWTP Flow was not Maximized ............................... 6-1 6.1.1 CSO 123, West System .......................................................................... 6-1 6.1.2 CSO 009, West System .......................................................................... 6-1 6.1.3 CSO 103, East System ............................................................................ 6-1 6.2 East WWTP Influent Pump and Bar Screen Update ...................................... 6-1 6.3 West WWTP Baffles Update ....................................................................... 6-1 7 Capacity Management, Operating, and Maintenance Program Activities ..................7-1 7.1 Fats, Oil, and Grease Program .................................................................... 7-1 7.1.1 Status of FOG Program Preparation ...................................................... 7-2 7.1.2 Status of Approved FOG Program Implementation .............................. 7-2 7.1.3 The following occurred during the reporting period: ........................... 7-2 7.2 Approved CMOM Program Activities .......................................................... 7-3 7.2.1 Root Intrusion Treatments for Sewer Segments ................................... 7-3 7.2.2 Pump Station Inspections ...................................................................... 7-3 7.2.3 Cleaning and Routine Inspection of Sewer Pipes .................................. 7-4 7.2.4 Manhole Inspections ............................................................................. 7-5 7.2.5 Pump Station Assessment Update ........................................................ 7-5 7.2.6 Pump Station Ten State Standards Compliance Update ....................... 7-5 7.2.7 Additional Information Regarding CMOM Adherence .......................... 7-5 8 Sewer Overflow Response Plan ...............................................................................8-1 8.1 Development and Revision of the Sewer Overflow Response Plan ............... 8-1 8.2 Implementation of Sewer Overflow Response Plan ..................................... 8-1 8.2.1 Training .................................................................................................. 8-1 8.2.2 Development or Revisions of Standard Operating Procedures ............ 8-1 8.2.3 Data Management and Tracking ........................................................... 8-1 EWSU Semi-Annual Report 2020-2 VII TABLE OF CONTENTS 8.2.4 Outreach and Educational Materials ..................................................... 8-1 8.2.5 Procedures for Public Notification ........................................................ 8-2 8.2.6 Application of the SORP ........................................................................ 8-2 9 Completion and Implementation of the LTCP ...........................................................9-1 9.1 Development Status of the LTCP ................................................................. 9-1 10 Sewer System Assessment Report ......................................................................... 10-1 11 Sewer Systems Remedial Measures Plan ............................................................... 11-1 11.1 Development Status of the SSRM Plan ....................................................... 11-1 12 General IOCP Development and Implementation ................................................... 12-1 12.1 Status of Consent Decree Appendix C Submittals ....................................... 12-1 12.1.1 Public and Regulatory Agency Participation ....................................... 12-1 12.1.2 SRCER Update ...................................................................................... 12-1 12.1.3 System Characterization...................................................................... 12-1 12.1.4 SSES and Work Plan ............................................................................. 12-1 12.1.5 Update to Modeling Program ............................................................. 12-1 12.1.6 Capacity Assessment ........................................................................... 12-2 12.1.7 SSA Report ........................................................................................... 12-2 12.1.8 SSRM Plan ............................................................................................ 12-2 12.1.9 Update of LTCP Portion of IOCP .......................................................... 12-2 12.2 Status of IOCP Improvements .................................................................... 12-2 Figure List of Tables 3-1 SSO and CSS Releases 3-2 Recurring SSO and CSS Release Locations 3-3 SSO and CSS Releases to Water Bodies 3-4 CCTV Inspections at SSO or CSS Release Locations 7-1 Updated Food Establishment Listing 7-2 Sewer Segments Treated for Root Intrusion 7-3 Cleaning Statistics, 8” to 15” Diameter Pipes 7-4 8” to 15” Diameter Pipe Cleaning 7-5 8” to 15” Diameter CCTV Pipe Inspections 7-7 Manhole Inspections 11-1 SSRMP Capacity Related SSO Release Locations 12-1 Decree Deliverables Listing 12-2 Non-IOCP Capital Investments VIII EWSU Semi-Annual Report 2020-2 Acronyms and Abbreviations CCTV closed-circuit television CMMS computerized maintenance management system CMOM Capacity Management, Operation, and Maintenance CSO combined sewer overflow CSS combined sewer system Decree Consent Decree between Evansville Water and Sewer Utility and the United States and State of Indiana DOJ U.S. Department of Justice FOG fats, oil, and grease IDEM Indiana Department of Environmental Management IOCP Integrated Overflow Control Plan LTCP Long-term Control Plan SAR Semi-Annual Report SOP standard operating procedure SORP Sewer Overflow Response Plan SRCER Stream Reach Characterization and Evaluation Report SSA Sewer System Assessment SSES sewer system evaluation survey SSO sanitary sewer overflow SSRM Sewer Systems Remedial Measures SSS separate sanitary sewer USEPA U.S. Environmental Protection Agency Utility Evansville Water and Sewer Utility WWTP wastewater treatment plant EWSU Semi-Annual Report 2020-2 IX SECTION 1 Introduction The Evansville Water and Sewer Utility (Utility) entered into a Consent Decree (Decree) with the U.S. Department of Justice (DOJ), the U.S. Environmental Protection Agency (USEPA), and the Indiana Department of Environmental Management (IDEM) in November 2010. The federal court entered the Decree as final on June 20, 2011. As part of the Decree, Semi-Annual Reports (SARs) must be submitted by the Utility to determine compliance with the requirements of the Decree. This SAR describes the Utility’s compliance with Decree Cause No. 3:09-cv-128-WTL-WGH for the July 1, 2020 through December 31, 2020 reporting period. This report follows the format and requirements for the SAR as required by Appendix D of the Decree. Specifically, the report provides updates for the following Decree requirements: • Section 2—Decree Section VI.A: Dry Weather Overflows • Section 3—Decree Sections VI.A and VI.B: Sanitary sewer overflow (SSO) and combined sewer system (CSS) Release Documentation and Reporting • Section 4—Decree Section VI.C: Installation of Overflow Alarms