Are there any pending changes to the January 31, 1994, List Rule?
No. The May 22, 1997 (62 FR 27992) proposed amendment to the list rule were finalized on August 25, 1997 (62 FR 45130). The amendment changed the hydrochloric acid concentration cut-off from 30% to 37%. The April 15, 1996 (61 FR 16606) proposed amendments to the list rule were finalized on January 6, 1998 (63 FR 640). The amendments to the list rule included: delisting Division 1.1 explosives; exempting from threshold determination regulated flammable substances in gasoline used a fuel and in naturally occurring hydrocarbon mixtures prior to initial processing; exempting flammable mixtures that do not have a National Fire Protection Association (NFPA) flammability hazard rating of 4; modifying the definition of stationary source to clarify that the term does not apply to transportation, storage incident to transportation and does not apply to naturally occurring hydrocarbon reservoirs; and clarifying that the chemical accident prevention provisions do not apply to sources located on th
