This webpage offers information about the Hazardous Materials Safety Enhancement Program; it includes links to PDFs of relevant documents. "In Mid 2009, based on the program audits and investigations conducted and communicated by both the Office of Inspector General (OIG) and the House Transportation and Infrastructure (T&I) Committee and by its own more recent internal program wide review and assessment, PHMSA [Pipeline and Hazardous Materials Safety Administration] began an office-wide enhancement and modernization effort in the Office of Hazardous Materials Safety. PHMSA acted to develop and implement the plans and solutions to address the program improvement recommendations from the OIG and House T&I. This PHMSA program focus and enhancement project was communicated and managed through the development and delivery of Action Plans generated for the Special Permits Program and the Approvals Program."
United States. Pipeline and Hazardous Materials Safety Administration: http://phmsa.dot.gov/