Where:
[DELTA](P/t) = Change in pressure, pounds per square inch gauge/hr.
Pf = Final pressure, pounds per square inch gauge.
Pi = Initial pressure, pounds per square inch gauge.
tf - ti = Elapsed time, hours.
40 C.F.R. §65.117
Where:
[DELTA](P/t) = Change in pressure, pounds per square inch gauge/hr.
Pf = Final pressure, pounds per square inch gauge.
Pi = Initial pressure, pounds per square inch gauge.
tf - ti = Elapsed time, hours.
40 C.F.R. §65.117