Enhanced Vapor Recovery (EVR) is required for gasoline dispensing facilities with underground storage tanks that are already required to have a vapor recovery system. Air districts that are in attainment with the state ozone standard are exempt from most EVR requirements. Air districts that have recently been designated as non-attainment areas,
may have different EVR deadlines than those provided here. Check with the Bay Area Air Quality Management District or the Northern Sonoma Air Pollution Control District to determine the vapor recovery requirements for your facility.
The State deadline for EVR Phase-II upgrades was April 1, 2009. All UST Owners/Operators are required to comply with this State mandate. Those who do not meet this deadline are subject to fines and/or UST closure. 
EVR upgrades require permitting from Sonoma County's Permit and Resource Management Department (PRMD) and may require a permit from the Department of Emergency Services Hazardous Materials Division. Check with our office, 707-565-1152, prior to beginning work to determine if a permit is required for installation of EVR.
For more information regarding enhanced vapor recovery, go to the California Air Resources Board website on Enhanced Vapor Recovery Compliance Guidance.
Contact the California Air Resources Board for additional information.
