basic guide to gasoline vapor recovery at the gasoline dispensing facility

June 16, 2010June 16, 2010 California Air Resources Board LaCalifornia Air Resources Board LaMar MitchellMar Mitchell

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Basic Guide to Gasoline Vapor Basic Guide to Gasoline Vapor Recovery at the Gasoline Recovery at the Gasoline

Dispensing FacilityDispensing Facility

Gasoline vapor recovery is a control Gasoline vapor recovery is a control strategy to capture gasoline vapors strategy to capture gasoline vapors during the transfer process.during the transfer process.


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Gasoline PathwaysGasoline Pathways(Transfer Points)(Transfer Points)

Refinery Marine loadingPipeline

Terminal


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Gasoline PathwaysGasoline Pathways(Transfer Points)(Transfer Points)


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Working DefinitionWorking Definition

Phase I vapor recovery is a control Phase I vapor recovery is a control strategy that captures and contains strategy that captures and contains the gasoline vapors during the the gasoline vapors during the transfer of gasoline from the truck to transfer of gasoline from the truck to the underground storage tank (UST).the underground storage tank (UST).

Phase II vapor recovery is a control Phase II vapor recovery is a control strategy that captures and contains strategy that captures and contains the gasoline vapors when a vehicle is the gasoline vapors when a vehicle is being fueled.being fueled.

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


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Why do we care about Why do we care about reclaiming the vapors?reclaiming the vapors?


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Air Pollution Impacts….Air Pollution Impacts….

HealthHealth

AestheticsAestheticsMaterialsMaterials

Ecosystems/Ecosystems/Natural Natural

ResourcesResources

AgricultureAgriculture


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Vapor Recovery BenefitsVapor Recovery Benefits 16 billion gallons/year 16 billion gallons/year CA gasoline salesCA gasoline sales Uncontrolled emissions of 8.4 lbs of gasoline Uncontrolled emissions of 8.4 lbs of gasoline

vapor for each 1000 gallons gasoline vapor for each 1000 gallons gasoline transferred (truck to UST/UST to vehicle)transferred (truck to UST/UST to vehicle)

372 tons/day 372 tons/day of uncontrolled vapor emissionsof uncontrolled vapor emissions

Total Benefit: 372 tons/day or Total Benefit: 372 tons/day or 120,000 gallons liquid gas/day or120,000 gallons liquid gas/day or$348,000 savings/day ($2.90/gal)$348,000 savings/day ($2.90/gal)


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Two Types of Vapor Two Types of Vapor RecoveryRecovery

Vehicle BasedVehicle Based

Dispenser Based Phase II Vapor Dispenser Based Phase II Vapor RecoveryRecovery


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Vehicle Based Vapor Vehicle Based Vapor RecoveryRecovery

Onboard Refueling Vapor Recovery Onboard Refueling Vapor Recovery (ORVR) provides for collection of the (ORVR) provides for collection of the refueling vapors in a carbon canister on refueling vapors in a carbon canister on the vehiclethe vehicle

Vapors not available to be returned to Vapors not available to be returned to the underground storage tankthe underground storage tank

It performs the same function as the It performs the same function as the Dispenser Based vapor recovery Dispenser Based vapor recovery system.system.


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Onboard Refueling Vapor Onboard Refueling Vapor Recovery or “ORVR”Recovery or “ORVR”

As fuel enters the vehicle tank, As fuel enters the vehicle tank, vapors are pushed to the onboard vapors are pushed to the onboard

canistercanister


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Dispenser Based Vapor Dispenser Based Vapor RecoveryRecovery

Phase II vapor recovery is designed to Phase II vapor recovery is designed to maximize collection of vapors during maximize collection of vapors during vehicle fueling and contain the vapors in vehicle fueling and contain the vapors in the facility underground storage tank.the facility underground storage tank.

Phase II vapor recovery routes the Phase II vapor recovery routes the vapors displaced from fueling vehicles vapors displaced from fueling vehicles back into the underground storage tank.back into the underground storage tank.


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Phase II TypesPhase II Types

Balance TypeBalance Type Works on the principle of Mass TransferWorks on the principle of Mass Transfer 10 gallons of liquid gasoline into your 10 gallons of liquid gasoline into your

vehicle tank forces 10 gallons of vapor back vehicle tank forces 10 gallons of vapor back to the underground storage tank.to the underground storage tank.

Vacuum AssistVacuum Assist Utilizes a vacuum pump in the system to Utilizes a vacuum pump in the system to

assist the vapor to return from the vehicle assist the vapor to return from the vehicle tank to the underground storage tank.tank to the underground storage tank.


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Two Phase II System Two Phase II System TypesTypes

Balance

Assist

Vapor Pump

basic guide to gasoline vapor recovery at the gasoline dispensing facility

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