Aquatic Environmental Toxicology

part A:
How would conduct a rapid and cost-effective estimation of bioaccumulation potential? hint: keep in mind the easiest and least expensive method and describe it in details.(half page)
why would you use this method?
and what will be the approximate cost in US dollars?. explain

part B

how does clean water ACT administered by the US EPA help to determine what the level of chemicals should be in our Nation's navigable waters?
how is the integrity of water estimated?