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    EVALUATION OF SANITARY SEWER OVERFLOWS AND UNPERMITTED DISCHARGES ASSOCIATED WITH HURRICANES HERMINE & MATTHEW

    JANUARY 6, 2017

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    EVALUATION OF SANITARY SEWER OVERFLOWS AND UNPERMITTED DISCHARGES ASSOCIATED WITH HURRICANES HERMINE & MATTHEW

    Financial Project No.: PR9792143-V2 RS&H No.: 302-0032-000

    January 6, 2017

    Prepared by RS&H, Inc. at the direction of the Florida Department of Environmental Protection

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    TABLE OF CONTENTS Chapter 1 INTRODUCTION ............................................................................................................................................................... 1 

    1.1  SCOPE OF THE EVALUATIONS..................................................................................................................................... 1 1.2  METHODOLOGY ............................................................................................................................................................... 2  1.3  DOCUMENT OVERVIEW ................................................................................................................................................ 2 

    Chapter 2 STORMWATER AND WATER LEVEL ANALYSIS .................................................................................................... 3 

    2.1  PRECIPITATION DATA .................................................................................................................................................... 3

    2.1.1  Hurricane Hermine .................................................................................................................................................... 3  2.1.2  Hurricane Matthew ................................................................................................................................................... 6 

    2.2  TIDAL SURGE ................................................................................................................................................................... 11 

    2.2.1  Hurricane Hermine ................................................................................................................................................. 11  2.2.2  Hurricane Matthew ................................................................................................................................................ 14 

    2.3  FEDERAL INSURANCE RATE MAPS ......................................................................................................................... 18 

    Chapter 3 UTILITY, HURRICANE IMPACTS AND SSO DISCUSSIONS ............................................................................ 22 

    3.1  CITY OF ST. PETERSBURG ........................................................................................................................................... 22 

    3.1.1  Utility Description ................................................................................................................................................... 22  3.1.2  Conditions Associated with Hurricane Hermine .......................................................................................... 24  3.1.3  Unauthorized Discharge Overview and Review of FDEP Reported Data .......................................... 24  3.1.4  Interviews with the City of St. Petersburg Water Resources Department ......................................... 25 

    3.2  CITY OF GULFPORT ...................................................................................................................................................... 27 

    3.2.1  Utility Description ................................................................................................................................................... 27  3.2.2  Conditions Associated with Hurricane Hermine .......................................................................................... 29  3.2.3  SSO Overview and Review of FDEP Reported Data.................................................................................... 29  3.2.4  Interviews with the City of Gulfport Public Works Department ............................................................ 29 

    3.3  CITY OF LARGO .............................................................................................................................................................. 30 

    3.3.1  Utility Description ................................................................................................................................................... 30  3.3.2  Conditions Associated with Hurricane Hermine .......................................................................................... 31  3.3.3  SSO Overview and Review of FDEP Reported Data.................................................................................... 31  3.3.4  Interviews with the City of Largo Public Works Department ................................................................. 31 

    3.4  PINELLAS COUNTY ........................................................................................................................................................ 32 

    3.4.1  Utility Description ................................................................................................................................................... 32  3.4.2  Conditions Associated with Hurricane Hermine .......................................................................................... 32  3.4.3  SSO Overview and Review of FDEP Reported Data.................................................................................... 33  3.4.4  Interviews with Pinellas County Utilities ......................................................................................................... 33 

    3.5  CITY OF CLEARWATER ................................................................................................................................................. 34 

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    3.5.1  Utility Description ................................................................................................................................................... 34  3.5.2  Conditions Associated with Hurricane Hermine .......................................................................................... 35  3.5.3  SSO Overview and Review of FDEP Reported Data.................................................................................... 35  3.5.4  Interviews with the City of Clearwater Public Works ................................................................................. 35 

    3.6  JEA ....................................................................................................................................................................................... 37 

    3.6.1  Utility Description ................................................................................................................................................... 37  3.6.2  Conditions Associated with Hurricane Matthew ......................................................................................... 39  3.6.3  SSO Overview and Review of FDEP Reported Data .................................................................................... 39  3.6.4  Interviews with the JEA Representatives ......................................................................................................... 40 

    3.7  CITY OF ST. AUGUSTINE ............................................................................................................................................. 44 

    3.7.1  Utility Description ................................................................................................................................................... 44  3.7.2  Conditions Associated with Hurricane Matthew ......................................................................................... 45  3.7.3  SSO Overview and Review of FDEP Reported Data.................................................................................... 46  3.7.4  Interviews with the City of St. Augustine Public Works Department .................................................. 47 

    3.8  SUMMARY OF FAILURE MODES ............................................................................................................................. 50 

    Chapter 4 EMERGENCY RESPONSE PLANS AND INDUSTRY BMPS .............................................................................. 53 

    4.1  TEN STATE STANDARDS ............................................................................................................................................ 53  4.2  EPA GUIDELINES ............................................................................................................................................................ 54  4.3  EMERGENCY RESPONSE PLANS RELATIVE TO FAILURE MODES ............................................................... 55 

    4.3.1  City of St. Petersburg ............................................................................................................................................. 55  4.3.2  City of Gulfport ...................................................................................

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