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Re: another question

   Hi, folks,
        Landfill gas is a source of dioxin, if burned,
  because of the presence of vinyl chloride
  monomer, which comes from deteriorating
  PVC. Typical flaring is very low temperature,
  and incomplete combustion, giving rise to
  particulates of elemental carbon and PAH,
  and polychlorinated phenols.
  -----Original Message-----
  From: asagady@sojourn.com <asagady@sojourn.com>
  To: Multiple recipients of list <dioxin-l@essential.org>
  Date: Tuesday, November 04, 1997 2:50 PM
  Subject: Re: another question
  >At 11:42 AM 11/4/97 -0500, you wrote:
  >>Another question:  Does anyone have information on dioxin in landfill
  >>gases - when they are vented
  >given low volatility of relatively this relatively high molecular weight
  >at typical ambient temperatures, I wouldn't expect anything in landfill
  >in the way of PCDD/PCDF emissions.   Landfill gas is obnoxious because
  >of reduced sulfur compounds and volatile organic compounds that may be
  >present.   There should be relatively good information about the content
  >of landfill gases in the support documents for the New Source Performance
  >Standard that was enacted by EPA to control  VOC emissions from landfills.
  >I'd also be concerned about emissions of biological materials (i.e. molds)
  >from landfills via fugitive emissions.   Asbestos can also be an issue.
  >Some old landfills received a lot of waste solvents prior to the early
  >and these solvents may be emitted in landfill gases and from leachaete
  >evaporation sites.
  > or flared?
  >I'm unaware of any emission data on PCDD/PCDF emissions from
  >MSW landfill flares.   It might be possible with poor combustion
  >conditions and the presence of chlorinated solvents in landfill
  >gas.   For properly designed and operated landfill gas combustors
  >I'd consider this a low priority source for concern on PCDD/PCDF
  >emissions where there is not a history of significant liquid solvent
  >>CCHW  Center for Health, Environment and Justice
  >>      P.O. Box 6806  Falls Church, VA 22040
  >>      (703) 237-2249   (703) 237-8389 (fax)
  >Alex J. Sagady & Associates        Email:  asagady@sojourn.com
  >Environmental Consulting and Database Systems
  >PO Box 39  East Lansing, MI  48826-0039
  >(517) 332-6971 (voice); (517) 332-8987 (fax)