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Selecting the Most Hazardous Substance for the Threat

  • Three factors are considered in selecting the most hazardous substance for the threat:

    • Ecotoxicity (fresh water or salt)
    • Persistence (river or lake)
    • Bioaccumulation Potential (fresh water or salt)

  • Because of parallelism between the threats, the issues in determining the most hazardous substance have already been discussed in Section 12 and 13 of this course. Here is an opportunity for a quick review:

  • The most hazardous substance for the environmental threat is the substance with the highest product of ecotoxicity, persistence, and bioaccumulation potential factor value (BPFV). Enter this product at line 15 of HRS Table 4-1, page 51608

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