792. Ammonia is included on the TRI toxic chemical list with the qualifier “includes anhydrous ammonia and aqueous ammonia from water dissociable ammonium salts and other sources; 10 percent of total aqueous ammonia is reportable under this listing.” For the purposes of reporting the maximum amount of the TRI chemical on-site at any time during the calendar year (Part II, Section 4 of the Form R), should the facility follow the 10% qualifier rule and report only 10% of the total aqueous ammonia on-site?
When determining the maximum amount on-site for Part II, Section 4 of the Form R, the facility only has to consider the reportable form of a chemical. Therefore, for aqueous ammonia, the facility should report 10% of the maximum amount of total aqueous ammonia on-site at any time during the calendar year. In addition, the facility must report 100% of the maximum amount of anhydrous ammonia in this section.