40 CFR 147.253 - Existing Class I, II (except enhanced recovery and hydrocarbon storage) and III wells authorized by rule.
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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=injection pressure at the well head in pounds per square inch
Sg=specific gravity of inject fluid (unitless)
d=injection depth in feet.
Title 40 published on 2014-07-01
no entries appear in the Federal Register after this date.