Richmond's Kennedy High School temporarily moving classes due to toxic chemical found on campusRichmond's Kennedy High School has been temporarily closed to students and staff after a toxic chemical was discovered in the campus ground. Richmond's Kennedy High School has been temporarily closed to students and staff after a toxic chemical was discovered in the campus ground. Richmond's Kennedy High School has been temporarily closed to students and staff after a toxic chemical was discovered in the campus ground. Richmond's Kennedy High School has been temporarily closed to students and staff after a toxic chemical was discovered in the campus ground. RICHMOND, Calif. (KGO) -- Richmond's Kennedy High School has been temporarily closed to students and staff after the toxic chemical PCE was discovered in the ground beneath the campus.