Chattanooga TN-based Heil Trailer International achieved ISO 9001:2000 certification for its locations in Athens TN; Rhome TX; Bilston, United Kingdom; Bangkok, Thailand; and Canuelas, Argentina in January 2004. Heil certification includes design, manufacture, and repair of chemical, dry bulk, and petroleum equipment. The external audit and certification of this quality standard was conducted by BVQI. Heil was originally the first tank trailer manufacturer certified to ISO 9001 and 9002 standards in April 1996.