Originally posted by midnight Target 
Just mix all those gases together ...
You get a bunch of semi inert, kinda dangerous, nearly natural gas. Problem solved.
(I took Chemistry in college  )
) 
That would be bad.  The natural gas is really the least of my worries.  Its burning in its own chamber and there's enough safeguards that its really not a problem.  Besides... its just natural gas.
The SiH4 OTH, is pyrophic.  Simple contact with air is a bad thing.  Not quite as bad as the "nearly pyrophoric" gas though... the one that hangs in a ready to combust state enabling it to actually build up volume until it hits something... well... anything.  Then there's that little issue of mixing O2 with H2 and making a rocket motor where you didn't really want one.
But those aren't really that worrisom.  I can't recall a single icident with any of these simply because we are totally paranoid with them.  I'm just pissed cause a deadline is going to slip.
Oh.. and I found out the ommission was not an accident this morning... there was a problem that they were hoping I wouldn't find out about.  Fricking unions.
MiniD