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It is the policy of the Federal Water Pollution Control Administration of the U. S. Department of the Interior that the relative toxicity of all chemical dispersants, both alone and in combination with oil, will be determined prior to their use for the dispersion of oil spills, and the cleaning of beaches and shore installations. Data on the relative toxicity of these materials alone-and when mixed with oil-provide the basis for the effective selection of those materials least toxic to aquatic life and for recommending or prohibiting their use. The Department takes the position that it is the responsibility of the manufacturer of such products to provide for their product alone and in oil mixture accurate tolerance limit values based on standard short-term bioassays with designated test organisms. The standard bioassay procedure used will be the one recommended by the FWPCA. This procedure is solely for the purpose of providing data which will indicate relative toxicity of dispersants and oil dispersant mixtures. These standard tests do not indicate the long-term toxicity of these materials to aquatic organisms, safe levels for the aquatic biota or for humans, nor do they constitute an endorsement of any material by the FWPCA.

Standard Methods For Determination Of Relative Toxicity Of Oil Dispersants And Mixtures Of Dispersants And Various Oils To Aquatic Organisms