Among the variety of oil spill response countermeasures, including mechanical, chemical, in-situ burning and bioremediation, deployment of chemical dispersants has been successfully utilized in numerous oil spills. This paper will review the history of the United States Coast Guard (USCG) C-130 Air Dispersant Delivery System (ADDS) capability, deployment in remote areas, and associated challenges. ADDS consists of a large tank with dispersant(e.g., 51,000 pounds), owned and operated by an industry partner, used aboard USCG C-130 aircraft designed to be ADDS capable as specified in various agreements for marine environmental protection missions. ADDS is a highly complex tool to utilize, requiring extensive training by air crews and industry equipment technicians to safely and properly deploy during an oil spill response. In 2011, the Commandant of the USCG, Admiral Papp reaffirmed the USCG's C-130 ADDS capability during a hearing before the Senate Committee on Commerce, Science, and Transportation, Subcommittee on Oceans, Atmosphere, Fisheries and the Coast Guard. The use of ADDS in remote areas creates unique challenges, such as logistical coordination between the USCG and spill response industry partners and maintaining proficiency with personnel. It is critical for federal, state, and local agencies, industry, and academia to understand the history and challenges of ADDS to ensure the successful utilization of this response tool in an actual oil spill incident.

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