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Georgia’s ULSD Experience

Georgia’s ULSD Experience. William Cook Florida Association of Pupil Transportation June 2006. Topics. Background ULSD Usage 3) Challenges & Solutions 4) Lessons Learned 5) Georgia Retrofit Program. Background. First shipment of ULSD occurred in November 2004

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Georgia’s ULSD Experience

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  1. Georgia’s ULSD Experience William Cook Florida Association of Pupil Transportation June 2006

  2. Topics • Background • ULSD Usage • 3) Challenges & Solutions • 4) Lessons Learned • 5) Georgia Retrofit Program

  3. Background • First shipment of ULSD occurred in November 2004 • First fleet began using ULSD in March 2005 • Single supplier – Chevron • Distributes fuel through Plantation Pipeline from Pascagoula, MS refinery • Lubricity additive blended at terminal • State of Georgia solicited for ULSD bids and Chevron was the low bidder • Incremental cost of ULSD is 8 cents per gallon on the state contract

  4. Background • Purpose of obtaining ULSD early • Reduce emissions from existing fleet • Retrofit fleets with diesel particulate filters • Funding • EPA’s Clean School Bus USA: $266,000 • CMAQ: approx. $4.5 million including match • Needed to demonstrate a 20 million gallon demand • Achieve only a 25% fleet participation rate

  5. ULSD Usage • Approximately 3.8 million gallons of ULSD consumed to date among Georgia’s fleets. • Fleets using ULSD – All are based in Metro-Atlanta • School Systems • Counties of Clayton, Coweta, DeKalb, Henry, and Newton • Cities of Atlanta, Carrollton, and Marietta • Cobb County Government • Transit Systems • Cobb Community Transit • Georgia Regional Transportation Authority

  6. Supply and Performance Challenges and Solutions • ULSD supply • No disruption in ULSD supplies, even during the hurricanes of 2005 • Chevron serviced only existing accounts during September and October 2005 • Performance • No loss in power • Fuel economy has remained the same

  7. Challenges and Solutions Maintenance • International 6.9/7.3 • May need to replace injector o rings and injector caps • Reported fuel hose leaks • International DT466E • Reported problems with fuel line sleeves • No pump failures • Model years range from late 1986 to 2004

  8. Challenges and Solutions Maintenance • International T444E • Replaced fuel line sleeves • Replaced fuel pumps • International DT360/408 • Fuel hose leaks • No other reported problems • Model years 1995 - 2002

  9. Maintenance - Cummins • 5.9L • Replace/rebuild injection and lift transfer pumps • Leaks in fuel hoses and o-rings • Model years 1989 - 2000 • 8.3L • Fuel lift transfer pump repairs • MY 1999 -2004 • Bulletin issued

  10. Early WarningLift Pump Leakage Due to Ultra Low SulfurDiesel Fuel Summary of the Early Warning This Early Warning informs the field of a potential lift pump fuel leak, if a customer switches to Ultra Low Sulfur Diesel fuel after using Low Sulfur Diesel fuel. Symptoms and Observations If a fleet changes fuel from LSD to ULSD, the lift pump can leak between the bracket and the lift pump body or at the electrical connector. Failure Verification If a fuel leak appears on the lift pump, determine if the customer has begun to use ULSD fuel recently. Engine Family Fuel System 6B, B5.9 & 6C, C8.3 Repair Instructions To avoid fuel leaks when changing to ULSD fuel, customers ought to consider replacing the lift pump as well.

  11. Maintenance – Other Engines • No problems reported • Caterpillar 3126 • Detroit Diesel 8.2L • Mercedes MBE906 2006 models • Good news • Once the repairs are made, the fuel leaks have stopped • One fleet saw repeated failures • Was using an additional lubricity additive • Fleet stopped using the additives and the leaks halted • May have seal leaks in fuel island dispensers: two school systems reported problems

  12. Lessons Learned • Do not switch between low sulfur and ultra-low sulfur diesel fuel • Plan for repairs • Introduce ULSD over the summer if possible • Other fuel additives are not needed and may exacerbate problems • Biodiesel can be blended with ULSD

  13. Georgia Retrofit Program • Clean School Bus USA • 5 school systems will retrofit total of 50 buses with diesel particulate filters: 8 completed • Fuel • 3 systems using ULSD • 2 systems using B20 with ULSD • Toyota SEP • Newton County: Retrofitted 100 buses with DPFs • City of Marietta: Retrofitted 28 buses with DPFs • Henry County: In process of retrofitting 108 buses with DPFs

  14. Georgia Retrofit Program • Georgia Pacific SEP • City of Atlanta Project: 373 buses retrofitted with a combination of DPFs, DOCs, and closed crankcase filters (CCFs) • 2005 and 2006 Retrofits (still in process) • Potential school bus retrofits using DPFs and CCFs • 56 buses in Clayton County • 40 buses in Coweta County • 133 buses in Gwinnett County • 33 buses in DeKalb County • CMAQ Retrofit Project • Total project: $2.5 million over 2005 and 2006 fiscal years • Plan to retrofit approximately 300 school buses

  15. Additional Information • William Cook, GA EPD: 404-363-7031 • Stacy Allman, GA EPD: 404-363-7033 • Websites • www.epa.gov/otaq • www.eere.energy.gov • www.gaepd.org • www.clean-diesel.org

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