Swmp

      CONTENTS
      1.    INTRODUCTION .............................................................................................................................. 1
            Site Location .................................................................................................................................. 2
            Flood Overlay ................................................................................................................................ 2
            Lawful Point of Discharge ............................................................................................................ 3

      2.    STORMWATER QUANTITY ............................................................................................................... 4
            Hydrologic Assessment................................................................................................................. 4
            2.1.1.             Existing Scenario ........................................................................................................ 4
            2.1.2.             Rational Method Check .......................................................................................... 5
            2.1.3.             Developed Scenario ................................................................................................ 6
            2.1.4.             Mitigation Scenario ................................................................................................... 7
            Flood Immunity .............................................................................................................................. 9

      3.    STORMWATER QUALITY ............................................................................................................... 10
            Design Objectives ....................................................................................................................... 10
            Stormwater Quality Treatment .................................................................................................. 10
            3.2.1.             Strategy .................................................................................................................... 10
            3.2.2.             MUSIC Parameters .................................................................................................. 10
            3.2.3.             Catchment Areas ................................................................................................... 11
            3.2.4.             MUSIC Model Layout .............................................................................................. 12
            Treatment Measures ................................................................................................................... 13
            3.3.1.             Bioretention System ................................................................................................ 13
            3.3.2.             Sediment Forebays ................................................................................................. 14
            Results ........................................................................................................................................... 14

      4.    CONSTRUCTION PHASE MANAGEMENT .................................................................................... 15
            Erosion and Sediment Control................................................................................................... 15

      5.    ESTABLISHMENT AND OPERATIONAL PHASE MANAGEMENT .................................................. 16
            Establishment............................................................................................................................... 16
            Operational ................................................................................................................................. 16

      6.    CONCLUSION .............................................................................................................................. 17

      7.    REFERENCES ................................................................................................................................. 18


      LIST OF TABLES
      Table 2-1: Summary of Existing Catchment Parameters .................................................................. 5
      Table 2-2: Existing Catchment Peak Flows ......................................................................................... 5
      Table 2-3: Comparison of WBNM and Rational Method Peak Flows ............................................. 5
      Table 2-4: Summary of Developed Catchment Parameters ........................................................... 6
      Table 2-5: Comparison of Peak Flows At Site Outlet (Existing Vs. Developed) .............................. 7




21-0166SMP01-V1 | Stormwater Management Plan | 25 Pavilion Street, Pomona