"Most notably, the Final Rule has developed a specialized approach for propane, chlorine and ammonium nitrate, largely in response to industry and stakeholder input," Deziel points out.
The original draft of the Chemicals of Interest List specified 7,500 lbs. as the STQ for propane, a flammable chemical. However, in the DHS's final version, the STQ for propane was set at 60,000 lbs., the estimated maximum amount of propane that nonindustrial users typically have.
Members of the agriculture and related industries were successful in convincing the DHS that users in rural areas do not have the potential to be a real threat to human life or health. Therefore, the DHS ruled that facilities do not need to include propane in tanks of 10,000 lbs. or less when calculating whether a facility has a total inventory of 60,000 lbs. because they realized that farmers and agricultural users usually possess three or more propane tanks to heat poultry and livestock barns.