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San Joaquin County Community Diesel Engine Emission Control Technologies Development Department — Additionally, several hundred city buses,garbage trucks, forklifts and cleaning machinery have used these additives for the last several years(Werner 2002). Environmental Fate and Transport: Fcr ocene will biodegrade given long time periods. Swedish EPA considers this product(in gasoline)as presenting no environmental hazard over conventional gasoline(Werner 2002). Heath Risks: Ferrocene has relatively low toxicity. Based on EU requirements, it is listed in the lowest toxicity class. There is no evidence of carcinogenicity or neurotoxic effects. Emission testing showed no general trends save an increase in iron in the exhaust. Chronic exposure studies showed no significant effect on the subjects(HEI,Attachment A,DieselNet 2000.02b, Werner 2002). Alternative Diesel Fuels A basic definition of an alternative diesel fuel is a fuel that can be used in a diesel engine without modification to the engine and that is not just a reformulated diesel fuel. For example,alternative diesel fuels may include emulsified fuels, — biodiesel fuels,Fischer Tropsch fuels,or a combination of these fuels with regular diesel fuel. The emissions effects of these fuels can vary widely. In general, alternative diesel fuels need to follow the same procedure as other emission control strategies. The major exception is that alternative diesel fuels must undergo a more extensive test procedure which includes 21 transient FTP — tests on the base fuel and the same on the test fuel. Those fuels are alternated according to one of three testing sequences found in the procedures. Fewer tests are required if cold starts are included. A second additional requirement for fuels — is that applicability, description, and fuel parameters need to be included with the application. Staff has harmonized these requirements with the interim procedure for alternative diesel fuels conducted through with the ARB's Stationary Source — Division(SSD). Although the SSD verification by itself would not be acceptable for the diesel emission control strategy program, the emission reductions may be claimed for other programs. The data from the alternative diesel fuel program may be used in the emission control strategies program. As with other strategies,the effect of the fuel on the engine durability must be demonstrated. The levels of reduction would be granted in the same manner as — other diesel emission control strategies. As is the case for other strategies, the verification would cover a specific group of engines or engine families. Extension of the verification may be sought after initial verification by — supplementing the data supporting the original verification with additional data and engineering analysis. DeSilva Gates Quarry Project — Draft Environmental Impact Report L-10 AS W05.05