Bill Davidson wrote: > > Halon is a brand name for the chemical Carbon Tetrachloride... > The county water quality people nearly shut down my water well last year > because we got just one reading of .6 (point six) parts per Billion > > The county gave me some printed information on Carbon Tetrachloride: Bill, I think your county is a bit confused. Halon 1211 is bromochlorodifluoromethane, formula CF2CIBR. Halon 1301 (also known as Freon 1301) is bromotrifluoromethane, formula CBrF3. 1000 ppm is the OSHA PEL. Carbon tetraflouride is CF4, I believe, and is a nasty character. Larry |
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