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2009-09-22_PWETC_AgendaPacket
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2009-09-22_PWETC_AgendaPacket
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Commission/Committee
Commission/Authority Name
Public Works Commission
Commission/Committee - Document Type
Agenda/Packet
Commission/Committee - Meeting Date
9/22/2009
Commission/Committee - Meeting Type
Regular
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solely on fleet turnover to achieve the full benefits of the new Review of Trash <br />engine standards could take up to 20 years due to the reliability of Co~lectlorl <br />diesel engines. In the meantime many of the older dirtier diesel <br />engines will continue to remain in service. ~ rn paCS <br />Natural Gas Vehicles <br />Natural gas engines offer the potential for significant reductions in <br />trash truck emissions. Natural gas is also a secure, domestically <br />produced fuel that reduces the demand for petroleum-based fuels <br />and imported oil. Replacing 50% of the estimated 136,000 diesel <br />trash trucks operating in the country with natural gas trucks would <br />annually displace approximately 600 million gallons of diesel fuel, <br />the equivalent of 14.3 million barrels of oil - a meaningful step <br />toward energy security". An added benefit is that natural gas <br />engines are significantly quieter than diesel engines. <br />In the past flour years the number of natural gas trucks in the <br />United States has more than doubled, and nearly 700 natural gas <br />garbage trucks are in operation today. By 2010 it is projected that <br />aver 2,200 natural gas garbage trucks will be operating in the <br />US's. ~"wo-thirds of the estimated 700 natural gas garbage trucks <br />in operation in the US operate on liquid natural gas {LNG), while <br />the rest use compressed natural gas (CNG). <br />Natural gas engines have already spawn that they can meet the <br />2010 EPA emission requirements while also generating half the <br />NOx emissions of 2010 compliant diesel engines. Natural gas <br />trucks, however, produce lower torque (power), are heavier and <br />take longer to fuel than diesel vehicles. While natural gas vehicles <br />can cost substantially more than diesel, the new emission <br />requirements and rising diesel fuel costs could erase the cost <br />advantage that diesel trucks have had over natural gas. <br />A major impediment to natural gas trash trucks in the City is the <br />lack of fueling infirastructure. <br />Biodiesel <br />Biodiesel is clean burning alternative fuel, produced from <br />domestic, renewable resources. Biodiesel contains no petroleum, <br />but it can be blended at any level with petroleum diesel to create a <br />Biodiesel blend. It can also be used in compression-ignition <br />(diesel) engines with little or na modifications. Biodiesel is <br />biodegradable, nontoxic, and essentially free of sulfur and <br />aromatics. Each of the licensed residential haulers reported that <br />they have experimented with Biodiese! with mixed results. <br />Problems with clogging of filters, jelling, cost and warranty issues <br />were cited. <br />" INFORM; Greening Garbage Trucks: Trends in Alternative Fuel Use, <br />2002-2005. <br />12 ibid. <br />Section 2 - 9 <br />
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