EXH2095033659

2.1.1 STIA Drainage: Storm Drain System and Industrial Waste System ...................... 2-1 2.1.2 Receiving Systems: Miller and Des Moines Creeks ............................................... 2-2 2.2 EXISTING BMPs ............................................................................................................ 2-2 2.2.1 Source Control ........................................................................................................ 2-2 2.2.2 Treatment BMPs: Industrial Wastewater System ................................................... 2-5 2.2.3 Treatment BMPs: Stormwater Drainage System .................................................... 2-5 2.3 EXISTING STORMWATER QUALITY ....................................................................... 2-6 3. PROPOSED MASTER PLAN BMP ALTERNATIVES ........................................................ 3-1 3.1 DESCRIPTION OF BMP ALTERNATIVES ................................................................. 3-1 3.1.1 Biofiltration Swales ................................................................................................ 3-1 3.1.2 Wet Vaults and Wet Ponds ...................................................................................... 3-2 3.1.3 Sand Filters ............................................................................................................. 3-3 3.2 MASTER PLAN PROJECT AREAS REQUIRING BMPsl ........................................... 3-4 3.2.1 Runway and Taxiways: SDS .................................................................................. 3-4 3.2.2 Non-Runway/Non-Taxiway Areas Draining to SDS .............................................. 3-4 3.2.3 IWS ......................................................................................................................... 3-5 .+ 4. PRELIMINARY REASONABLE POTENTIAL ANALYSIS ............................................... 4-1 4.1 ESTABLISHMENT OF POLLUTANTS OF CONCERN .............................................. 4-1 4.2 PREDICTED POLLUTANT CONCENTRATIONS ...................................................... 4-1 4.3 ESTABLISHMENT OF CRITERIA ............................................................................... 4-2 4.4 ESTIMATION OF BMP EFFECTIVENESS .................................................................. 4-2 4.5 ESTIMATION OF EFFLUENT POLLUTANT CONCENTRATIONS ........................ 4-3 4.6 RECEWING WATER CONDITIONS ........................................................................... 4-3 5. BMP SELECTION PROCESS ................................................................................................ 5-1 5.1 CRITERIA FOR BMP SELECTION .............................................................................. 5-1 5.1.1 Safety ...................................................................................................................... 5-1 5.1.2 Cost .................................................................... i.................................................... 5-2 5.1.3 Space Requirements ................................................................................................ 5-2 5.1.4 Maintenance Considerations ................................................................................... 5-2 5.2 ADVANTAGES AND DISADVANTAGES OF SPECIFIC BMPs ............................... 5-3 5.2.1 Wet Ponds ............................................................................................................... 5-3 5.2.2 Wet Vaults .............................................................................................................. 5-3 5.2.3 Biofiltration Swales and Filter Strips ...................................................................... 5-3 Port of Seattle - Sea Tae International Airport 55-2912-01 (28) DRAFT Stormwater Quality Management Plan July 1998 AR 033660 5.2.4 Sand Filters ............................................................................................................. 5-4 6. PREFERRED ALTERNATIVES…

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PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]