Except as provided in §§ 372.27 and 372.28 , the threshold amounts for purposes of reporting under § 372.30 for toxic chemicals are as follows:
1987-75,000 pounds of the chemical manufactured or processed for the year.
1988-50,000 pounds of the chemical manufactured or processed for the year.
1989 and thereafter-25,000 pounds of the chemical manufactured or processed for the year.
40 C.F.R. §372.25