40 CFR 147.1953 - Existing Class I, II (except enhanced recovery and hydrocarbon storage) and III wells authorized by rule.
Maximum injection pressure. The owner or operator shall limit injection pressure to the lesser of:
(a) A value which will not exceed the operating requirements of § 144.28(f)(3) (i) or (ii) as applicable or
Pm=(0.733 − 0.433 Sg)d
Pm=injection pressure at the well head in pounds per square inch
Sg=specific gravity of injection fluid (unitless)
d=injection depth in feet.
Title 40 published on 2014-07-01
no entries appear in the Federal Register after this date.