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Title

Toxics in Surface Runoff to Puget Sound: Phase 3 Data and Load Estimates

 
Publication number Date Published
11-03-010May 2011
VIEW NOW: Acrobat PDF format (Number of pages: 257) (Publication Size: 7469KB)




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Author(s) Herrera Environmental Consultants, Inc.
Description The Department of Ecology identified surface runoff as the most significant contributor of toxic chemicals to Puget Sound during earlier phases of the Puget Sound Toxics Loading Analysis. This study monitored an extensive list of contaminants in 16 streams in the Puyallup and Snohomish watersheds. Streams drained commercial/industrial, residential, agricultural, and forest/field/other lands. Most chemicals were detected more frequently and at higher concentrations during storm events than baseflow. Concentrations and loading rates were generally higher in the commercial/industrial basins and lower in the forested basins. At the Puget Sound scale, the relative amount of land area strongly influenced the relative contaminant loading.
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Keywords stream, contaminant, flow, Puyallup, Snohomish, urban, basin, water, loading, surface runoff, toxic, Puget Sound, oil
WEB PAGE Control of Toxic Chemicals in Puget Sound
WATERSHED Water Resource Inventory Areas
(WRIA 09,WRIA 10,WRIA 13,WRIA 14,WRIA 15,WRIA PS)
DATA Environmental Information Management (EIM) #PSTox001

RELATED PUBLICATIONS Title:

Quality Assurance Project Plan: Phase 3: SUSTAIN Modeling for Controlling Toxic Chemicals in Small Streams

Addendum to Quality Assurance Project Plan: Control of Toxic Chemicals in Puget Sound Phase 3: Characterization of Loadings via Surface Runoff

Focus on Nutrients and Puget Sound: Nitrogen in surface water runoff to Puget Sound

Focus on Puget Sound: Toxics in Surface Runoff to Puget Sound

Appendix A. Detailed Maps of Monitoring Locations and Associated Drainage Basins

Appendix B. Documentation for GIS Analyses Performed During the Monitoring Location Selection Process

Appendix C. Sample Collection Times by Monitoring Location and Associated Hydrologic Conditions

Appendix D. Figures Showing Sample Collection Times Relative to the Stream Hydrograph at Each Monitoring Location

Appendix E. Target Parameters for the Phase 3 Study of Toxics in Surface Runoff to Puget Sound

Appendix F. Measurement Procedures for the Phase 3 Study of Toxics in Surface Runoff to Puget Sound

Appendix G. Alternative Method for Computing Watershed Scale Loading Estimates

Appendix H. Storm Event Delineation Method Description

Appendix I. Validation Reports for Laboratory Data -- available only on CD (85 MB)

Appendix J. Validation Reports for Stream Gauging Data

Appendix K. Detection Frequency Summary Tables for Individual Parameter by Flow Condition, Land Use, and Watershed

Appendix L. Summary Statistics for Toxic Chemical Concentrations by Monitoring Location, Land Use, and Watershed

Appendix M. Box Plots Comparing Toxic Chemical Concentrations between Monitoring Locations

Appendix N. Subbasin Scale Unit-Area Toxic Chemical Loading Estimates

Appendix O. Whisker Plots Comparing Unit-Area Toxic Chemical Loading Estimates between Monitoring Locations

Appendix P. Watershed-Scale Total Toxic Chemical Loading Estimates

Appendix Q. Puget Sound-Scale Total Toxic Chemical Loading Estimates

Appendix R. Median Concentrations and Frequency of Detection by Storm Event

Appendix S. Temporal Analysis

Quality Assurance Project Plan for Phase 3: Characterization of Loadings via Surface Runoff