1. (1) For calendar year reporting period 2009 and thereafter, the following substances shall be designated as lower hazard substances:

   CAS # Chemical Name 78-83-1 Isobutyl alcohol 78-92-2 Sec-butyl alcohol 71-36-3 N-butyl alcohol

2. (2) For calendar year reporting period 2010 and thereafter, the following substances shall be designated as lower hazard substances:

   CAS # Chemical Name 123-86-4 Butyl acetate 110-19-0 Isobutyl acetate 7705-08-0 Ferric chloride 10028-22-5 Ferric sulfate 7758-94-3 Ferrous chloride 7720-78-7 Ferrous sulfate 7782-63-0 Ferrous sulfate

REGULATORY AUTHORITY

301 CMR 41.00: M.G.L. c. 21I, §§ 4 and 9.