EXH0041017573

As required by its current NPDES Permit, the Port has monitored the stormwater quality from its SDS outfalls since 1995. Overall, the data show that the concentrations of various constituents in STIA stormwater are generally less than those in runoff fi'om other residential, urban, and irdustrial areas in the region (Table 4-8). For example, the median concentrations for STIA constituents (column 3) are lower than those in urban stormwater (columns 5 and 6), with the exception of total recoverable copper. These data provide evidence for the efficacy of BMPs that have been implemented by the Pt_rt over a number of years. The following sections provide a brief description for each constituent category. Table 4-8. Seattle-Tacoma International Airport runoff quality (1994-2000) compared to regional and national urban stormwater quafity studies" (from Port of Seattle 2000b). (1) (2) (3) (4) (5) (6) (7) (8) (9) (lo) Bellevue: Bellevue: STIA: STIA: SturtevantCreek¢ BUR_ King County: NURph: Portland Freeway RW/TWb All Data (log-normal (mean, (Metro1982) (EPA 1983) NPDESi Runoff Constituent Units (median) (median) median) median) (mean) (median) (median) (mean) FOG mg/L 0.5 i.0 3.7 2.5 7.8 - - 30r TPH mg/L 0.08 0.Y 3.7 - - - 6.5 - Fecal mptV 14 42 201 980 - 1000to - - coliforrm !00ml 21000 BOD mg/L 5.0 6.0 - 6.6 - 9 20 - TSS mg/L 9 17 82.3 50 - 100 119 106s ' Turbidity mg/L 7 13 29.4 19 .... NH3d mg/L 0.03 0.1 0.58 0.17 .... Cu (TR) pg/L 26 25 i 0.4…

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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 [...]