Any industrial or manufacturing firm or corporation, except a retail pharmacy, which mixes or produces for commercial sale, any elements or compounds listed in 40 C.F.R. § part 116 and designated as hazardous substances in accordance with section 311 of the federal Water Pollution Control Act (33 USC 1251 et seq.) shall submit to the health director appointed pursuant to chapter 368e, of the town, city or borough in which such elements or compounds are mixed or produced, upon the request of such health director, a list of all such elements or compounds mixed or produced during the previous year. Such list shall be submitted within thirty days of the date of such request. Such list shall be open for public inspection at the office of the health director. Nothing in this section shall be construed to require disclosure of trade secrets as defined in subsection (b) of § 1-210.