Stage I Vapor Recovery Testing

Stage I Vapor Recovery Testing

Stage I Vapor Recovery Testing is defined in the National Air Toxic Standards for Gasoline Dispensing Facilities 40CFR63 Subpart CCCCCC. Test requirements for each system type follow these basic rules. If you currently have a Stage II Vapor Recovery system, a re-certification is required annually. Gas dispensing facilities that have converted to Stage I Vapor Recovery also have annual requirements for testing. The new regulations require stations that converted from Stage II to Stage I to register the underground tank as a Stage I system, perform testing upon conversion, and then test annually. The types of testing performed will depend on the brand equipment installed and the configuration of the system. The most common tests used for Stage I underground tank systems are the Pressure Decay 2" W.C. Test (TP-201.3), Vapor Tie Test (TP-96-1) for manifold tanks, P/V Vent Valve Test (TP-201.1E), Static Torque Rotatable Adaptor Test (TP 201.1B), and Leak Rate of Drop Tube/Drain Valve (TP-201.1C) or Leak Rate of Drop Tube/Overfill Prevention test (TP 201.1D), depending on the type of spill bucket that is in place.

Conversion Deadlines

Massachusetts has set deadlines for converting from Stage II to Stage I. Stage I systems and components prevent the escape of gasoline vapor during the refilling of an underground storage tank. Stage II systems capture the gasoline vapors during the refueling of automobiles. Gas dispensing facilities using Stage II Vapor Recovery Systems in their underground tanks should convert to Stage I by 2017. Facilities that are excavating an underground tank to perform repairs or add a new dispenser need to convert to Stage I at the time of the repair or upgrade. Gasoline stored in aboveground storage tanks must convert to Stage I Vapor Recovery by 2022.

Conversion Steps

A conversion from Stage II to Stage I Vapor Recovery typically includes the following steps. A gasoline dispensing facility must replace the dispenser nozzles, hoses, breakaways, and hose reel adaptors (if equipped). Stage II vacuum pumps must be removed and electronic dispensers reprogrammed so that the dispenser no longer controls the vacuum system. If the gas dispenser does not have a vacuum system, then vapor return lines are drained back to the tank, and the lines are capped. Non-rotatable coaxial or two point vapor/fill adaptors must also be replaced. The Husky 5885 P/V is the only vent cap that is currently California Air Resources Board (CARB) compliant. The installation of this model is required to meet the Stage I Vapor Recovery standards.

This EPA video summarizes Stage I Vapor Recovery.

For more information about underground storage tank regulations, third party inspections and tank testing contact one of our tank experts at 1-800-628-8260.

Share this story, Choose your platform!