Reports on a study of the toxicity of the tire crumbs typically found in artificial turf. The study found that the concentrations of particulate matter, metals, and volatile organic compounds that make up tire crumb were below levels considered harmful. However, given the limited nature of the study (limited number of constituents monitored, sample sites, and samples taken at each site) and the wide diversity of tire crumb material, it is not possible, without additional data, to extend the results beyond the four study sites to reach more comprehensive conclusions.
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