Agenda - 10-07-2008 - 7a - Laserfiche WebLink

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ash is processed torecyc e the ferrous and nonferrous metals and the remainder is graded and used in road and other construction. The biological processes produce residues aswell. These are of two types: (1) inert residues that are |andfi||ad and ��l organic residues that be cured to he a soil ^ ' amamendment or compost. Biological VVPT are mass reduction technologies so that contaminants such as heavy metals are concentrated in the residue. Tests for these contaminants need to be conducted during operations and appropriate measures taken' For all but the high-temperature therna| options and theanaerob an ash will be generated. Bottom ash will be discharged from the bottom of the furnace chamber, and fly ash will be collected by the air pollution control system. In accordance with applicable law, VVTE ash must be tested to ensure it is non- hazardous' The test iscalled the Toxicity Characteristic Leaching Procedure (TCLP)' Genera||y, thebottornash has not been dassifiedasa hazardous rnataria|,subject tu ash testing and analysis. Fly ash, however, will have a higher concentration of heavy � neta|sand may also contain residual organics. As such, it would ||he|y be classified sa hazardous material if it fails toxicity testing, unless itiacombined with bottom ash, as is the current U.B. practice. It should be noted that communities with aggressive, comprehensive recycling programs and programs focused on removing tm«icsfrom the MSVV stream, such as those to divert used electronics (e-wastal, household hazardous waste (HHVV), nnercurytherrnonnetans,fluorescent light �x±~res,batteries, various metals and white goods and the like, could be expected to have a post-diversion 4S V stream for combustion containing less toxic materials and thus the ash from combustion to have a lower po bantia| to exhibit hazardous characteristics upon 7CLPtesting. The solids residual from high temperature systems, such as plasma-arc or may have a better opportunity for end-use applications and marketing. These glassy-type granules may be classified as non-hazardous and used in construction materials or as a O||. Vendors claim the substrate after digestion is beneficially processed and recovered/ with the residue from anaerobic digestion is nothing more than stones, glass or similar ibsno which is nonno||y directed to a solid waste landfill. However, digestion, like combustion, is a concentrating process. This is the result of the converted to s and utilized or released into the atmosphere. organicnmatt�rb�|ng ozn«�i the gas will be part of the residue but in a higher As a result toxic materials n � wo concentration than in the hg��a| feedstock. These claims are unproven in plants operating using MSVVasfeedstock. 5.3 Environmental Issues of Waste Processing Technologies 5.3.1 Air Quality 5.3.1.1 Applicable Regulations solid waste incinerators, vvhdl the U.S. EPA refers to as Municipal Waste Combustors, are regulated under the federal Clean Air Act, originally passed by Congress in 1969 and updated in 1967, 1970, 1977,1990 and 1995 and 1998' Numerous city and local governments have enacted similar legislation, either GBB/CO8027-01 26 August 15,2OO8