medical waste incinerator stack testing

[RobC313@aol.com]

  After a couple years of stalling, a local 25 ton per day medical waste
  incinerator is finally doing stack testing. The problem is that we have lost
  confidence in the regulatory agencies overseeing the testing and need to have
  a better understanding of the testing procedures.  As community activists we
  have learned that while taking the air samples to test for organics and
  metals "the collected samples for the metals analysis were determined to be
  invalid by the observers and new samples will be collected" 
  
  My question is this. Are there any scientific reasons to be suspect of the
  claim that they would have to retest for metals.  Could it be that a "typical
  burn" would not be able to conform to both organics and metals, and that
  perhaps they had fine tuned the system to pass the organics, knowing they
  could retest (and re-tune?) for the metals?
  
  Additionally, A week before the testing someone had overheard the Incinerator
  owners, say that the testing should go well unless they have a "glass train".
   Could someone explain the term glass train and why it would pose a problem ?
   Is there any significance to their having to re-test for metals?
  
  Obviously we need lots of tech ( and perhaps legal) help.  If you, or someone
  you know are familiar with the procedures for stack testing and if such
  suspected shenanigans are common in the industry we would be most grateful
  for advice and guidance.
  
  Rob Cedar
  Humanity Against Contamination
  Robc313@aol.com