EXH0762027767

for the period July 1, 1995 through June 30, 1996 Port of Seattle I" November 18, 1996 prepared by Scott Tobiason Environmental Management Specialist, Port of Seattle Environmental Services AR 027767 Annual Stormwater Monitoring Report for Seattle-Tacoma International Airport for the period July 1, 1995 through June 30, 1996 _ .71 PortofSeattle November 18, 1996 prepared by Scott Tobiason Environmental Management Specialist, Port of Seattle Environmental Services AR 027768 Acknowledgments reviewed by Tom Hubbard, Port of Seattle, and Gary Minton, Resource Planning Associates AR 027769 Table of Contents Table of Contents ....................................................................................... .............. i List of Figures .......................................................................................................... i List of Tables ........................................................................................................... ii Glossary ................................................................................................................. iii Executive Summary ................................................................................................ 1 Introduction ............................................................................................................. 3 Sources of Reported Data ................................................................................. 3 Requirements for the Annual Report ................................................................. 3 Background ............................................................................................................. 6 Stormwater Monitoring Program ........................................................................ 6 Sampling locations ......................................................................................... 8 Storm Definition .................................................................................... ........ 10 Sampling procedures and constituents ........................................................ 11 Results and Discussion ......................................................................................... 14 _ Stratified Data Set for Stormwater Discharges . ......................... 14 Stormwater Data Reduction ............................................................................. 16 Data Interpretation: censored data ............................................................... 19 Data Interpretation: estimators of central tendency ...................................... 19 "Box" Plots .................................................................................................... 20 Stratum 1" all NPDES "Storms". ..................................................................... 21 FOG and TPH in grab samples .................................................................... 21 Suspended Solids and Turbidity ................................................................... 26 Ammonia ...................................................................................................... 30 BOD5 ............................................................................................................ 33 Fecal coliforms in Grab Samples .................................................................. 35 S urfactants ................................................................................................... 38 Metals ........................................................................................................... 40 Stratum 2: Aircraft Deicing ......................................................... . .................... 47 Stratum 3: Airfield Deicing Operations ............................................................. 50 Background .................................................................................................. 50 1996 Airfield Deicing…

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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 [...]