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MIAMI-DADE DISTRICT SCHOOLS

MIAMI-DADE DISTRICT SCHOOLS. BEFORE the Final Decision. THINGS TO CONSIDER. Initial cost of the bus Residual value Infrastructure costs & accessibility MPG equivalents/fueling times/fueling frequencies Emissions Training (drivers & mechanics)

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MIAMI-DADE DISTRICT SCHOOLS

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  1. MIAMI-DADEDISTRICT SCHOOLS BEFORE the Final Decision

  2. THINGS TO CONSIDER • Initial cost of the bus • Residual value • Infrastructure costs & accessibility • MPG equivalents/fueling times/fueling frequencies • Emissions • Training (drivers & mechanics) • Fuel availability, cost per equivalent gal, domestic vs. foreign • Examples of success • User satisfaction • Reliability, warranty and parts support • Accuracy of proposals • Cost effectiveness

  3. DIESEL VS. CNGMDCPS 2011/2012

  4. DIESEL • $93,884/15 years = $6,259 • 12 years = $7,824 Average fuel cost/year • 16,545 miles/7MPG X $3.47 = $8,202 • Annual cost/15 years = $14,461 • 12 years = $16,026

  5. CNG • $145,301/15 years = $9,686 • 12 Years = $12,108 Average fuel cost/year 16,545 miles/5 MPG X $2.20 = $7,280 • Annual cost/15 years = $16,966 • 12 YEARS = $19,388

  6. ADDITIONAL ITEMS TO CONSIDER • Tanks on CNG bus needs changing every 10 years • Additional 5 year warranty on CNG engines costs $5,800, Diesel costs $800, not available for propane • Shops have to be retro-fitted for CNG I.E. explosion-proof lighting, methane detection sensors on ceilings, exhaust fan installation

  7. Maintenance schedule for Diesel is less frequent than for CNG engine (Cummins) • Per a June 2010 publication from the National Renewable Energy Laboratory, U.S. Department of Energy – “At The End of a Vehicle’s Life, a CNG Vehicle is Worth No More than a Diesel Vehicle.”

  8. Assuming that MDCPS buses travel 16,545 miles annually (per MDCPS 5 Year Transportation Plan), and are resold after 12 years in operation, then the residual value of the ISL-G CNG will be $96,869, and the ISB Diesel will be $46, 952 – a difference of $49,917. See below for MDCPS Residual Value breakdown. • ISB DieselISL-G CNG 400,000 Mile Life Cycle 600,000 Mile Life Cycle 24 year life (400,000 miles/16,545) 36 year life (600,000 miles/16,565) $3,911 Annual Depreciation ($93,884/24) $4,036 Annual Depreciation ($145,301/36) $46,932 Total Depreciation @ 12 yrs ($3,911 x 12) $48,432 ($4,036 x 12) $46,952 Residual Value ($93,884-$46,932) $96,869 ($145,301-$48,434)

  9. Gather as much information as you can find regarding applicable use of the product • Carefully check the information as it relates to your application • Run the numbers and make your OWN decision

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