STANDARDS PRESENTATION Page 2 of 19 TO
CALIFORNIA OCCUPATIONAL SAFETY AND HEALTH STANDARDS BOARD
TITLE 8 , DIVISION 1 , CHAPTER 4
( 3 ) “ Chief ” means the Chief of the Division of Occupational Safety and Health ( Division ), or designee .
( 4 ) “ Confirmed Silicosis ” means any one of the following :
( A ) A written diagnosis of silicosis is made by a PLHCP accompanied by one or more of the following :
1 . A chest X-ray , interpreted by an individual certified by the National Institute for Occupational Safety and Health ( NIOSH ) as a B Reader , classifying the existence of pneumoconioses of category 1 / 0 or higher ; or
2 . Results from a computer tomography ( CT ) scan or other imaging technique that are consistent with silicosis ; or
3 . Lung biopsy findings consistent with silicosis ; or
( B ) Death certificate listing silicosis or pneumoconiosis from silica dust as an underlying or contributing cause of death ; or
( C ) Exposure to airborne respirable crystalline silica accompanied by one or more of the following :
1 . Chest X-ray ( or other imaging technique , such as a CT scan ) showing abnormalities interpreted as consistent with silicosis ; or
2 . Lung histopathology consistent with silicosis .
( 5 ) “ Director ” means the Director of the National Institute for Occupational Safety and Health ( NIOSH ), U . S . Department of Health and Human Services , or designee .
( 6 ) “ Effective ,” “ Effectively ,” and “ Effectiveness ” means employee exposure to airborne respirable silica is demonstrated to be less than the action level .
( 7 ) “ Employee Exposure ” means the exposure to airborne respirable crystalline silica that would occur if the employee were not using a respirator .
( 8 ) “ High-eEfficiency Particulate Air ( HEPA ) Filter ” means a filter that is at least 99.97 percent efficient in removing mono-dispersed particles of 0.3 micrometers in diameter .
( 9 ) “ High-Exposure Trigger Task ” means machining , crushing , cutting , drilling , abrading , abrasive blasting , grinding , chiseling , carving , gouging , polishing , buffing , fracturing , intentional breaking , or intentional chipping of artificial stone that contains more than 0.1 percent by weight crystalline silica , or natural stone that contains more than 10 percent by weight crystalline silica . High-exposure trigger tasks also includes clean up , disturbing , or
OSHSB-98 ( 2 / 98 )