The end-of-life vehicle recycler/shredder industries in Washington generate a significant amount of waste that goes to the metals recycling industry and to municipal landfills as alternative daily cover. This project focused on independently collecting and analyzing ASR samples from four shredders in Washington for waste characterization against RCRA and Washington Dangerous Waste limits to evaluate potential environmental impacts. ASR waste characterization is complicated by the heterogeneity of the waste stream, changes in metal extraction processes, and changes in auto manufacturing materials. We reviewed the shredders’ current practices and protocols for ASR processing, waste generation, sampling, and waste characterization and proposed recommendations for sampling protocol changes to improve consistency and representativeness of ASR samples collected and analyzed.
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