The US Environmental Protection Agency (EPA) amended its National Emission Standards for Hazardous Air Pollutants (HAPs) earlier this week, altering the petrol distribution requirements through bulk terminals, plants and pipeline sites.
The new changes are an update on the rules established in 2008 which require specific vapour controls when refilling petrol storage tanks.
Previously, all sites that sold 10,000 gallons or more a month had to file a facility report to the EPA and report any leak checks.
Following the changes, any terminal that produces more than 20,000 gallons a day will have to adhere to bulk petrol plant standards rather than the bulk petrol terminal requirements.
The new rules also now exclude sumps, butane blending sample recovery tanks and oil or water separators from the reports.
Facilities are now required to include in their reports whether or not their petrol output is determined on the volume loaded into all storage tanks or by the volume taken from the tanks.
From this week, storage tanks will need to be tested for vapour tightness before they are six months old.