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Quality Assurance Project Plan: Screening Model for 6PPDQ Delivery to the Stormwater Network

QAPP: Screening Model for 6PPDQ Delivery to the Stormwater Network This Quality Assurance Project Plan (QAPP) was prepared in support of the Multi-Criterion Decision Tool to Address 6PPD-Q Tire Wear Particles project (Multi-Criterion Decision Tool project hereafter). More specifically, this QAPP addresses development of a 6PPD-q Screening Model (Screening Model) that predicts the relative delivery of 6PPD-q to the stormwater network via runoff from roadways. Under the Multi-Criterion Decision Tool project, the output from the Screening Model will be integrated into a King County stormwater prioritization tool (tool), which is a decision guidance tool being separately developed to support retrofit planning efforts. The tool will identify and prioritize drainage subbasins and roadway segments where improvements to existing stormwater management infrastructure would yield multi-benefit outcomes. The tool will compare subbasins and/or roadway segments. The tool allows the user to consider multiple decision criteria, such as presence of fish-bearing streams, hotspots of other stormwater pollutants, and metrics for human health equity, among others, when evaluating the selection and siting of stormwater retrofits.

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    QAPP: Screening Model for 6PPD-q Delivery to the Stormwater Network

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