Standing and breathing losses · Storage conditions, ambient temperature, and vapour pressure influence vapour generation and movement.
Gasoline evaporation
Evaporation is not one event.
Storage, transfer, refuelling, and spillage are different phenomena. Good decisions begin by keeping them separate.
Working and loading losses · Filling and withdrawal can displace vapour; control configuration changes the result.
Refuelling displacement · Vehicle refuelling is a distinct process addressed by vehicle and station controls in many jurisdictions.
Spillage · Liquid released during handling is tracked separately from evaporation.
VOC and benzene context
Gasoline vapour contains volatile organic compounds. Health Canada’s work on benzene near gasoline stations illustrates why source, process, distance, controls, and modelling assumptions matter.
Control context changes the number
An uncontrolled factor cannot be treated as the expected value for a controlled site. A mass-emission factor cannot be presented as liquid-volume loss. A national sales figure cannot be relabelled station throughput.