1. June 16, 2010 California Air Resources Board LaMar Mitchell1 Basic Guide to Gasoline Vapor Recovery at the Gasoline Dispensing Facility Gasoline vapor recovery is a control strategy to capture gasoline vapors during the transfer process. Gasoline vapor recovery is a control strategy to capture gasoline vapors during the transfer process.

2. June 16, 2010 California Air Resources Board LaMar Mitchell2 Gasoline Pathways (Transfer Points) Refinery Marine loading Pipeline Terminal

3. June 16, 2010 California Air Resources Board LaMar Mitchell3 Gasoline Pathways (Transfer Points)

4. June 16, 2010 California Air Resources Board LaMar Mitchell4 Working Definition Phase I vapor recovery is a control strategy that captures and contains the gasoline vapors during the transfer of gasoline from the truck to the underground storage tank (UST). Phase I vapor recovery is a control strategy that captures and contains the gasoline vapors during the transfer of gasoline from the truck to the underground storage tank (UST). Phase II vapor recovery is a control strategy that captures and contains the gasoline vapors when a vehicle is being fueled. Phase II vapor recovery is a control strategy that captures and contains the gasoline vapors when a vehicle is being fueled.

5. VAPOR RECOVERY PROGRAM PHASE I AND PHASE II VAPOR RECOVERY SYSTEMS PHASE I VAPOR RECOVERY FUEL TO TANK VAPORS TO TRUCK PHASE II VAPOR RECOVERY FUEL TO CAR VAPORS TO TANK

6. June 16, 2010 California Air Resources Board LaMar Mitchell6 Why do we care about reclaiming the vapors?

7. June 16, 2010 California Air Resources Board LaMar Mitchell7 Air Pollution Impacts…. Health Aesthetics Materials Ecosystems/ Natural Resources Agriculture

8. June 16, 2010 California Air Resources Board LaMar Mitchell8 Vapor Recovery Benefits 16 billion gallons/year CA gasoline sales 16 billion gallons/year CA gasoline sales Uncontrolled emissions of 8.4 lbs of gasoline vapor for each 1000 gallons gasoline transferred (truck to UST/UST to vehicle) Uncontrolled emissions of 8.4 lbs of gasoline vapor for each 1000 gallons gasoline transferred (truck to UST/UST to vehicle) 372 tons/day of uncontrolled vapor emissions 372 tons/day of uncontrolled vapor emissions Total Benefit: 372 tons/day or 120,000 gallons liquid gas/day or $348,000 savings/day ($2.90/gal)

9. June 16, 2010 California Air Resources Board LaMar Mitchell9 Two Types of Vapor Recovery Vehicle Based Vehicle Based Dispenser Based Phase II Vapor Recovery Dispenser Based Phase II Vapor Recovery

10. June 16, 2010 California Air Resources Board LaMar Mitchell10 Vehicle Based Vapor Recovery Onboard Refueling Vapor Recovery (ORVR) provides for collection of the refueling vapors in a carbon canister on the vehicle Onboard Refueling Vapor Recovery (ORVR) provides for collection of the refueling vapors in a carbon canister on the vehicle Vapors not available to be returned to the underground storage tank Vapors not available to be returned to the underground storage tank It performs the same function as the Dispenser Based vapor recovery system. It performs the same function as the Dispenser Based vapor recovery system.

11. June 16, 2010 California Air Resources Board LaMar Mitchell11 Onboard Refueling Vapor Recovery or “ORVR” As fuel enters the vehicle tank, vapors are pushed to the onboard canister

12. June 16, 2010 California Air Resources Board LaMar Mitchell12 Dispenser Based Vapor Recovery Phase II vapor recovery is designed to maximize collection of vapors during vehicle fueling and contain the vapors in the facility underground storage tank. Phase II vapor recovery is designed to maximize collection of vapors during vehicle fueling and contain the vapors in the facility underground storage tank. Phase II vapor recovery routes the vapors displaced from fueling vehicles back into the underground storage tank. Phase II vapor recovery routes the vapors displaced from fueling vehicles back into the underground storage tank.

13. June 16, 2010 California Air Resources Board LaMar Mitchell13 Phase II Types Balance Type Balance Type Works on the principle of Mass Transfer Works on the principle of Mass Transfer 10 gallons of liquid gasoline into your vehicle tank forces 10 gallons of vapor back to the underground storage tank. 10 gallons of liquid gasoline into your vehicle tank forces 10 gallons of vapor back to the underground storage tank. Vacuum Assist Vacuum Assist Utilizes a vacuum pump in the system to assist the vapor to return from the vehicle tank to the underground storage tank. Utilizes a vacuum pump in the system to assist the vapor to return from the vehicle tank to the underground storage tank.

14. June 16, 2010 California Air Resources Board LaMar Mitchell14 Two Phase II System Types Balance Assist Vapor Pump