Sampling, Occurrence, and Toxicity of 6PPDQ and Related Chemicals
WQNEPSW-2023-UWTaco-00006
To address knowledge gaps in understanding the toxicity of 6PPD-quinone and additional tire-derived chemicals observed in roadway stormwater, this project proposes to:1) Improve storm sample collection and capacity via remote or passive sampler development;2) Characterize 6PPD, 6PPDQ and other PPD-quinone concentrations and dynamics in key small watersheds of the Puyallup, Nisqually, Deschutes, and deep South Sound.3) Evaluate individual tires with high or low 6PPD content for their ability to leach tire-derived chemicals and cause or explain acute and sub-lethal toxicity.4) Compare the relative pollution potential and toxicity of subsurface tire reefs in the Puget Sound and above-surface tire embankments in freshwater systems from tire-derived chemicals.This work will help to define how tire rubber chemicals are degrading water quality and contributing toxicity in small, tribally prioritized watersheds across the South Sound. Relative to the greater Seattle area, very little monitoring of roadway runoff, 6PPDQ, and related CECs has occurred in the South Sound although tribal partners have consistently observed stormwater-linked mortality events in coho salmon in several of the watersheds we are proposing to study. This work will help to define how roads, tires, and humans are polluting ecologically and culturally sensitive watersheds with 6PPDQ and similar previously unprioritized contaminants. By integrating chemical analysis and toxicology data, this study will help protect ecosystems by allowing for data driven management of legacy tires, stormwater and roadway runoff events._x000D_
WRIAs 9, 10, 11, 13 (King, Pierce, Thurston, Mason, and Kitsap Counties)_x000D_
Toxics in Fish_x000D_
$999,911Fund in Full