Rule 323. In addition to the requirements contained in 49 C.F.R.§192.625, which is adopted by reference in R 460.20606, an operator shall establish and maintain adequate records to establish compliance with the requirements of 49 C.F.R. §192.625, including the quantity of odorant used per million cubic feet of gas and sampling to determine the effectiveness of odorization.
Mich. Admin. Code R. 460.20323