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Drat....second correction...

  >>Burning 500 million pounds at 99.9999% destruction removal equivalence
  >>(DRE) may release 5,000 pounds of PCBs if the dielectric fluid is one
  >>million parts per million; 3,750 pounds of PCBs released at 750,000 ppm,
  >>and 2,500 pounds PCBs at 500,000 ppm PCBs. Dielectric fluids range from
  >>50% - 100% pure PCBs (or 500,000 - 1,000,000 ppm). We do not need any
  >>more PCBs in the air, water, food chain or ecosystems. Incineration will
  >>certainly release PCBs since it ain't perfect, and the potential is for
  >>far more PCBs to be released than this conservative calculation.
  >>99.99999% is based upon a Trial Burn using a surrogate chlorinated
  >>compound-NOT PCBs-and this is pie in the sky as far as incineration
  DRAT!!   Second correction.....  I slipped a decimal point in prior messages
  and emissions are higher than in previous message....
  The undestroyed/emissions are   250 lbs of PCBs   burning 500,000,000 pounds
  of PCB waste at 250,000 PPM   and 500 lbs of PCBs  burning  500,000,000
  pounds of 
  00% PCBs,  both assuming 99.9999% DRE
  500,000,000 pounds =  5  E8 pounds of waste
  99.9999% DRE is equivolent to  0.0001% PCB undestroyed/released
  0.0001% PCB undestroy/released =  1 E-6 proportion of PCB release during burning
  1 ppm PCB content = 1E-6 proportion of PCB in a waste which is 1 PPM PCB
  For your 500,000 ppm PCB waste:
  In 500,000,000 pounds of 500,000 ppm PCB waste 
  there is  5 E8  *  5 E 5  * 1 E-6 total PCBs
  or 25 E7 pounds or  250,000,000 pounds of PCB
  If these 250,000,000 pounds of PCB are burned with a DRE of 99.9999% then 
  after incineration there is  25 E7 * 1 E-6  or    25 E 1    or
  250 pounds of PCBs emitted/undestroyed at 99.9999% DRE
  For 500,000,000 pounds of 100% PCB waste
  that would be 5 E8  * 1 E-6   or  5 E 2 of undestroyed PCBs or
  500 pounds of PCBs emitted/undestroyed at 99.9999% DRE
  The above are theoretical emission rates and do not deal 
  with PICs, PCDD/F, HCL, etc.
  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)