»Chapter 890, Designation of PFOS as a Priority Chemical - Reopen comment period [Posted on Monday April 06, 2020] The Department is proposing to adopt a new rule that will designate perfluorooctane sulfonic acid ("PFOS") and its salts as a priority chemical and require reporting for certain product categories that contain this regulated chemical. The proposed rule applies to manufacturers of specified product categories that contain intentionally added amounts of PFOS and its salts, which is often used to make clothing water repellent, among many other uses. The proposed rule was posted to a 30-day public comment period beginning October 2. Prior to the close of the comment period the Department received more than five requests for a public hearing so the comment period was reopened and a hearing held on January 23. The Department is now proposing changes to the draft rule to include specific salts of PFOS, and make other minor changes, and the comment period is being reopened to receive comment on the revised draft.