Dating pcb spills

It wasn’t until the late 1970s when the ban was lifted, allowing companies to use PCBs under strict guidelines set forth by the EPA.Enacted on October 11, 1976, The The Toxic Substances Control Act (TSCA) is designed to secure information on both new and old PCBs as well as other toxic chemicals.

In practice, form 8700-22A does not have adequate space to list required PCB-specific information for several PCB articles.Because of PCBs' environmental toxicity and classification as a persistent organic pollutant, PCB production was banned by the United States Congress in 1979 and by the Stockholm Convention on Persistent Organic Pollutants in 2001. Environmental Protection Agency (EPA), PCBs cause cancer in animals and are probable human carcinogens.The International Agency for Research on Cancer (IARC), rendered PCBs as definite carcinogens in humans. Many rivers and buildings including schools, parks, and other sites are contaminated with PCBs, and there have been contaminations of food supplies with the toxins.Unfortunately, the chemical properties that made PCBs so attractive to industry are the same properties that make them a potential threat to health and the environment.PCBs decompose very slowly in the environment and accumulate up the food chain from phytoplankton to invertebrates, fish, and mammals.

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