The EPA Journal recently asked six respected observers what their response would be to the question "how clean is clean at a hazardous waste site?" They received six different answers. The Environmental Protection Agency's (EPA's) decisions in regard to selecting remedies at hazardous waste disposal sites have emerged from experience, because nowhere do existing law or Agency policy define the level of cleanup that must be achieved during a response action. In order to pursue more consistent decisionmaking at a hazardous waste site, the Agency is considering several policies and guidance, which taken together represent movement toward broad uniformity in the decisionmaking process.