EXH1320053402

-- = . .mR i li i iiii i I III Seattle-Tacoma International Airport Third Runway Embankment Fill Water Quality and Transport Analysis FINAL O S.S. PAPADOPULOS & ASSOCIATES, INC. February15,2002 AR 053402 ]32o _-_ ii n ipl II II II lUl Seattle-Tacoma International Airport Third Runway Embankment Fill Water-Quality and Transport Analysis FINAL Prepared For: " Portof Seattle Prepared by: (_ S.S. Papadopulos and Associates, Inc.101 N. Capital Way, Suite 107, Olympia, WA 98501 Telephone: 360/709-9540 February 15, 2002 AR 053403 Table of Contents Page .o* List of Figures ....................................................................................................................... m ... List of Tables ...................................................................................................................... m Section 1.0 Introduction 1 1. l Background ................................................................................................... 1 1.2 Objective ....................................................................................................... 1 1.3 Approach ....................................................................................................... 1 Section 2.0 Embankment Fill Criteria 3 2.1 Soil Criteria ................................................................................................... 3 2.2 Water-Quality Criteria ................................................................................... 3 Section 3.0 Data Analysis 4 3.1 Soil Testing ................................................................................................... 4 3.1.I Chemical Analysis of Soils ...................................................................... 4 3.1.2 Adsorption Capacity ................................................................................. 4 3.2 Synthetic Precipitation Leaching Procedure .......................................................... 5 Section 4.0 Numerical Modeling Analysis 6 4.1 Model Configuration ..................................................................................... 6 4.2 Model Parameters .......................................................................................... 7 4.2.1 Flow Parameters ....................................................................................... 7 4.2.2 Transport Parameters ................................................................................ 8 4.3 Initial and Input Values ................................................................................. 9 4.3.1 Flow Values .............................................................................................. 9 4.3.2 Transport Values ...................................................................................... 9 4.4 Simulations .................................................................................................. 10 4.4.1 General Embankment Fill ...................................................................... 10 4.4.2 Harem Creek Fill .................................................................................... 10 4.4.3 First Avenue Bridge Fill and Black River Quarry Fill ........................... 11 4.4.4 Sensitivity Analysis ................................................................................ 11 4.5 Modeling Results ......................................................................................... 12 AR 053404 4.5.1 Transport of Metals ................................................................................ 12 4.5.2…

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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 [...]