%PL = ((PL-PS)/(PT-PS)) * 100
where:
%PL = Percent leaking pumps
PL = Number of pumps found leaking as determined through monthly monitoring as required in paragraphs (b)(1) and (b)(2) of this section.
PT = Total pumps in organic HAP service, including those meeting the criteria in paragraphs (e) and (f) of this section.
PS = Number of pumps leaking within 1 month of start-up during the current monitoring period.
40 C.F.R. §63.163