Many NSPS rules require data to be recorded in specific intervals. For example, standards for Electric Arc Furnaces (EAF) measure "charging" periods that typically last from 1 to 3 minutes .
The suffix likely represents a timestamp or a specific duration measurement within an automated log. NSPS-91503:08:36 Min
Stringent NSPS regulations for industries like pressure-sensitive tape coating or steel plants require automated monitoring equipment to track temperature, opacity, or flow rates . A log entry like "08:36 Min" could indicate a peak reading or a duration of a specific operational cycle. Many NSPS rules require data to be recorded
These are technology-based standards designed to limit emissions from new, modified, or reconstructed industrial facilities . or reconstructed industrial facilities .