Results of Commodity Flow Surveys can be obtained from LEPC (Local Emergency Planning Committee).
The Local Emergency Planning Committee is a federally mandated entity. It is composed of state and local officials, business representatives and members of press.
They assist in preparing for emergencies, particularly those concerning hazardous materials' exposure. They develop and review the emergency response plan and provide information about chemicals & hazardous materials in the community to citizens living nearby.
[Source 1, 2]