Families outside Seattle filed a lawsuit against local officials and agrochemical giant Monsanto, alleging they allowed the school site to become toxic with the use of the now-banned industrial chemicals known as PCBs.
Since 1979, the toxic sleeper chemical polychlorinated biphenyls has been banned. Commonly known as PCB, the chemical has been proven to cause many ailments such as cancer. One of the more popular uses for the chemical is in window caulks used in schools, and any school built before 1979 could possibly home the PCB poison. Parents worried about their children's welfare took the guilty school districts to court over the matter.