3 Regulatory Approaches

Problem:

Broad Spectrum of Chemicals With Unknown Toxicity

But With Striking SAR

Approaches:

1. Treat All PHAHs As Equitoxic To TCDD

2. Ignore All PHAHs Lacking Definitive Toxicological Data

3. Develop Relative Potency Ranking Scheme Which Utilizes Existing Data and Scientific Judgement

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