PBA05.14.2026packet

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TABLE OF CONTENTS
1.0  EXECUTIVE SUMMARY .................................................................................................................... 1
  1.1 Project Description ................................................................................................................... 1
  1.2 Stormwater Pollution Controls................................................................................................. 2
2.0  SITE CHARACTERISTICS .................................................................................................................. 3
  2.1 State Environmental Quality Review ....................................................................................... 3
  2.2 Land Use and Topography ....................................................................................................... 3
  2.3 Soils and Groundwater............................................................................................................. 3
  2.4 Watershed Designation ........................................................................................................... 4
  2.5 Receiving Water Bodies ........................................................................................................... 4
  2.6 Aquifer Designation .................................................................................................................. 4
  2.7 Wetlands ................................................................................................................................... 4
  2.8 Flood Plains .............................................................................................................................. 4
  2.9 Listed, Endangered, or Threatened Species .......................................................................... 5
  2.10 Historic Places ........................................................................................................................ 5
  2.11 Rainfall Data........................................................................................................................... 5
  2.12 Pre-development Watershed Conditions .............................................................................. 5
  2.13 Post-development Watershed Conditions ............................................................................ 6
  2.14 Description of Design Points ................................................................................................. 6
3.0  STORMWATER MANAGEMENT PLANNING .................................................................................... 6
  3.1 STEP 1 – Site Planning ............................................................................................................ 7
  3.2 STEP 2 – Calculate Water Quality Treatment Volume (WQv) ................................................ 7
  3.3 STEP 3 – Apply RR Techniques and Standard SMPs with RRv Capacity to Reduce
  Total WQv......................................................................................................................................... 8
  3.4 STEP 4 – Calculate the Minimum RRv Required.................................................................... 9
  3.5 STEP 5 – Apply Standard SMPs to Address Remaining Water Quality Volume .................... 9
  3.6 STEP 6 - Apply Volume and Peak Rate Control .................................................................... 11
  3.7 Climate Change Consideration .............................................................................................. 13
4.0  CONSTRUCTION SEQUENCE ......................................................................................................... 14
5.0  CONSTRUCTION-PHASE POLLUTION CONTROL ........................................................................... 14
  5.1 Temporary Erosion and Sediment Control Measures .......................................................... 15
  5.2 Permanent Erosion and Sediment Control Measures ......................................................... 17
  5.3 Implementation Schedule for Erosion and Sediment Control Measures ........................... 17

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