On July 3,2002, the U.S. Environmental Protection Agency (EPA) proposed their decision not to regulate chlorine and hydrochloric acid emissions from chlorine production (67 FR 44713) under the authority of section 112(d)(4) of the Clean Air Act (CAA). Public comments were requested on the proposed decision in the Federal Register. Eight letters were received from industry representatives, governmental entities, and environmental groups during the public comment period. The report presents a list of the commenters, their affiliations, and the EPA docket number assigned to their correspondence. The written comments that were submitted, along with responses to these comments, are summarized in section 2..0 of this document. The summary of comments and responses serves as the basis for the final decision not to regulate chlorine and hydrochloric acid emissions from the chlorine production source category.