LOS ANGELES -- At its Sept. 16 meeting in Los Angeles, the Occupational Safety and Health Standards Board made the following rulings on variance requests:Heat and Control, Inc., Hayward: Denied a request for a permanent variance from General Industry Safety Order (GISO) 4853(d) regarding the use of local exhaust ventilation or supplied air respirators while performing inert gas-metal-arc welding on stainless steel.Heat and Control had been cited by the Division of Occupational Safety and Health (D
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