EPA released its draft risk evaluation for the flame retardant Tris(2-chloroethyl) phosphate (TCEP) (CASRN 115-96-8) under the Toxic Substances Control Act (TSCA) for public comment. EPA has used the best available science to preliminarily determine that this chemical poses unreasonable risk to human health and the environment. This is the first draft risk evaluation EPA has released for the 20 High-Priority Substances prioritized in 2019. EPA has incorporated improvements to the risk evaluation process announced in 2021 into this risk evaluation including an assessment of exposure to potentially exposed and susceptible subpopulations like workers, children, and subsistence fishers.