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Enhanced Vapor Recovery Enhanced Vapor Recovery Workshop January 19, 2000Workshop January 19, 2000
New Test ProceduresNew Test ProceduresSpillageSpillage (TP-201.2C)(TP-201.2C)
““Dripless” NozzlesDripless” Nozzles (TP-201.2D)(TP-201.2D)
Pressure Integrity ofPressure Integrity of
Phase I Drop Tubes Phase I Drop Tubes (TP-201.2O)(TP-201.2O)
Spillage Test Procedure Spillage Test Procedure TP-201.2CTP-201.2C
Current ProcedureCurrent Procedure
Calibration at each fueling locationCalibration at each fueling location
Three trials at each of 1, 5 and 25 mlThree trials at each of 1, 5 and 25 ml
Ignores spills less than 1 ml in sizeIgnores spills less than 1 ml in size
New ProcedureNew Procedure
One calibration per facilityOne calibration per facility
Three trials at 1, 2, 3, 4, 5, 10, 25 and 50 mlThree trials at 1, 2, 3, 4, 5, 10, 25 and 50 ml
Trials are averaged and Calibration Graph is Trials are averaged and Calibration Graph is generated.generated.
All spills of 1 drop or more includedAll spills of 1 drop or more included
Spillage Test Procedure Spillage Test Procedure TP-201.2CTP-201.2C
Calibration Graph
Spill Area versus Spill Volume
1.0
2.0
3.0
4.0
5.0
6.0
7.0
0.0 1.0 2.0 3.0 4.0
ln [Spill Volume (ml)]
TP-201.2FTP-201.2F“Dripless” Nozzles“Dripless” Nozzles
No more than 1 drop per fueling.No more than 1 drop per fueling.
Proposed Test MethodologyProposed Test Methodology Customer asked if fueling is to be a fill-upCustomer asked if fueling is to be a fill-up If yes, CARB staff requests to fuel vehicleIf yes, CARB staff requests to fuel vehicle Fueling is at high clip or, if no clip, fully openFueling is at high clip or, if no clip, fully open When nozzle shuts off, wait (timed) 10 secs.When nozzle shuts off, wait (timed) 10 secs. Remove nozzle from fillpipeRemove nozzle from fillpipe Away from car, point nozzle downwardAway from car, point nozzle downward Observe for 5 secs. and record dripsObserve for 5 secs. and record drips
Magnitude of Emissions From Magnitude of Emissions From Spillage and “Dripless” NozzlesSpillage and “Dripless” Nozzles
1998 - 14.2 Billion Gallons of Gasoline Sold 1998 - 14.2 Billion Gallons of Gasoline Sold in California in California
Assume 10 gallons and 1 drop per fuelingAssume 10 gallons and 1 drop per fueling
20 drops = 1 ml20 drops = 1 ml
3785 ml = I gallon3785 ml = I gallon
6.24 pounds per gallon of gasoline6.24 pounds per gallon of gasoline
1 drop/10 gal fueling = 1 drop/10 gal fueling = 58.4 TPY58.4 TPY in CA in CA
TP-201.2OTP-201.2OPressure Integrity of Phase IPressure Integrity of Phase I
Drop Tube Protection DevicesDrop Tube Protection Devices
• UST Pressure Reduced to Zero Gauge UST Pressure Reduced to Zero Gauge PressurePressure
• Test Cap Assembly Attached to Drop TubeTest Cap Assembly Attached to Drop Tube• Nitrogen Introduced at Maximum Allowable Nitrogen Introduced at Maximum Allowable
LeakrateLeakrate
• Pressure In Drop Tube Must Reach At Least Pressure In Drop Tube Must Reach At Least
2” W.C. To Pass2” W.C. To Pass
Pressure Integrity of Phase IPressure Integrity of Phase IDrop Tube Protection DevicesDrop Tube Protection Devices
• Straight Drop TubesStraight Drop Tubes• No Allowable No Allowable
LeakrateLeakrate
Pressure Integrity of Phase IPressure Integrity of Phase IDrop Tube Protection DevicesDrop Tube Protection Devices
• Overfill ProtectionOverfill Protection• Allowable Leakrate Allowable Leakrate
as Specified in as Specified in CP - 201CP - 201
Field Test ResultsField Test Results
ORVR Vehicle Impact On Balance Vapor RecoveryORVR Vehicle Impact On Balance Vapor Recovery
Pilot Field Study of PV Valve Pressure Vacuum Pilot Field Study of PV Valve Pressure Vacuum Performance Specifications As Per TP-201.2B, Performance Specifications As Per TP-201.2B, Appendix 1 Appendix 1
ORVR Vehicle Impact On ORVR Vehicle Impact On
Balance Vapor RecoveryBalance Vapor Recovery
Basic Station LayoutBasic Station LayoutBalance SystemBalance System
2 Dispensers2 Dispensers4 Nozzles4 NozzlesCoaxial Phase I on Single 12K Gallon USTCoaxial Phase I on Single 12K Gallon USTSingle P/V Vent ValveSingle P/V Vent ValveMonthly Throughput of Monthly Throughput of 10,000 Gallons 10,000 Gallons
ORVR Vehicle Population > 95%ORVR Vehicle Population > 95%
Initial Station UST Pressure Profile
ORVR Vehicle Impact On Balance Vapor Recovery
-8
-6
-4
-2
0
2
4
Two Week IntervalDecember 1-14, 1999
US
T P
ress
ure
ORVR Impact on Balance Vapor Recovery Systems(Bad Phase I Delivery)
-8.00
-6.00
-4.00
-2.00
0.00
2.00
4.00
6.00
November 17-19, 1999 (Midnight - Midnight)
US
T P
ress
ure
TP-201.2B, Appendix 1 Determination of Pressure and Vacuum Performance
Specifications For Pressure/Vacuum Vent Valves
• Pilot StudyPilot Study
• Mobile Test CartMobile Test Cart
• Testing New P/V Testing New P/V Valves From Parts Valves From Parts HousesHouses
Questions?Questions?
