STANDARDS PRESENTATION Page 1 of 19 TO
CALIFORNIA OCCUPATIONAL SAFETY AND HEALTH STANDARDS BOARD
TITLE 8 , DIVISION 1 , CHAPTER 4
Subchapter 7 . General Industry Safety Orders Group 16 . Control of Hazardous Substances Article 110 . Regulated Carcinogens
Amend Section 5204 as follows :
5204 . Occupational Exposures to Respirable Crystalline Silica . ( a ) Scope and application .
( 1 ) This section applies to all occupational exposures to respirable crystalline silica , except : ( A ) Construction work covered under Section 1532.3 ; ( B ) Agricultural operations covered under Section 3436 ; and ( C ) Exposures that result from the processing of sorptive clays .
( 2 ) This section does not apply where the employer has objective data demonstrating that employee exposure to respirable crystalline silica will remain below 25 micrograms per cubic meter of air ( 25 μg / m 3 ) as an 8-hour time-weighted average ( TWA ) under any foreseeable conditions .
EXCEPTION : Subsection ( a )( 2 ) does not apply to high-exposure trigger tasks , as defined in subsection ( b ).
( 3 ) This section applies to high-exposure trigger tasks regardless of employee exposures , exposure assessments , or objective data .
( 43 ) This section does not apply if the employer complies with Section 1532.3 and :
( A ) The task performed is indistinguishable from a construction task listed on Table 1 in subsection ( c ) of Section 1532.3 ; and
( B ) The task will not be performed regularly in the same environment and conditions . ( b ) Definitions . For the purposes of this section the following definitions apply :
( 1 ) “ Action Level ” means a concentration of airborne respirable crystalline silica of 25 μg / m 3 , calculated as an 8-hour TWA .
( 2 ) “ Artificial Stone ” means any reconstituted , artificial , synthetic , composite , engineered , or manufactured stone , porcelain , or quartz . It is commonly made by binding crushed or pulverized stone with adhesives , polymers , epoxies , resins , or other binding materials to form a slab .
OSHSB-98 ( 2 / 98 )