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San Joaquin County Community Diesel Engine Emission Control Technologies — Development Department Concentration Value. Any ash with zinc levels above these limits is considered a hazardous waste and should be handled accordingly. Determination of Hazardous Waste Applicable hazardous waste laws are found in the California Health and Safety Code,Division 20; California Code of Regulations,Title 22,Division 4.5; and Title 40 of the Code of Federal Regulations. Staff recommends requiring manufacturers to notify consumers if a waste stream from their product is known to be a hazardous waste. Since actions of the end user can influence the composition of ash and other waste streams,it is also the responsibility of the owner/operator/maintenance provider of the engine using the diesel emission control system to determine if .. the waste stream is classified as hazardous according to Section 66261.3,Title 22 of the California Code of Regulations. If a waste stream is determined to be hazardous, the hazardous waste generator(as defined in 22 CCR, § 66262.10) _ must comply with all appropriate County, State and Federal Regulations. This can include application for state and/or federal generator identification numbers, proper handling, storage and management of the hazardous waste stream, and proper disposal and treatment of the hazardous waste stream. Excluded Recyclable Material Section 25143.2 of the Health and Safety Code allows for wastes that can be reused or recycled to be treated accordingly. This option might be open to some waste streams,especially those containing precious metals and/or other reclaimable components. Fuel Additives Fuel additives are essentially any substance added to the fuel. Additives can reduce the total mass of PM,with variable effects on CO,NOx and HC production. Use of some additives alone shows 15 percent to 50 percent mass reductions in PM. The reduction can be as high as 99 percent when used with a DPF. Some additive-based systems reduce polynuclear aromatic hydrocarbons by around 80 percent. Additives can range from less than 10 parts per million (ppm)to greater than 100 ppm in the fuel. Additives can significantly decrease soot combustion temperatures facilitating DPF regeneration. Mixed data exist regarding fuel economy. Some studies show a fuel economy improvement ranging from five to seven percent,while others show an equivalent fuel penalty. Most additives are fairly insensitive to fuel sulfur content and will work with a range of sulfur concentrations as well as different fuels and other fuel additives (HEI,Attachment A, DieselNet 2000.02b, Mayer 1999). DeSilva Gates Quarry Project Draft Environmental Impact Report L-5 AS 05105.05