Page 61 - Safety Memo

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Notes: • Insulators of electrical conductors
Check Table AC-1 frequently as the content may have been • Plaster, cement, drywall, and taping compounds
revised.
• Floor tile and tile adhesives
Employers must display the required warning signs in work • Acoustical ceilings (tiles and sprayed on)
areas where hazardous contaminants and dust are present.
• Asbestos-cement piping, shingles, and panels
Air Compressors • Roofing felt and sealing compounds
Because asbestos exposure has been linked to serious
General requirements for air compressors include: illnesses, Fed/OSHA and Cal/OSHA have implemented strict
A. Employers must obtain a DOSH permit for the air tanks of air regulations to minimize exposures to work site and “take-home”
compressors operated at a work site. 461(a) asbestos. Below is a summary of regulatory requirements:
Exception: No permit is required for tanks with a diameter A. Construction projects are subject to regulation under 1529 if
of less than 6 in., tanks equipped with a safety valve set to they involve one or more of the following activities, regardless
open at no more than 15 psi pressure, or tanks having a of the percentage of asbestos present:
volume of 1 1/2 cu. ft. or less with a safety valve set to open 1. Demolition or salvage of structures where asbestos is
at no more than 150 psi. 461(f) present.
B. Warning signs are required for electric air compressors 2. Removal or encapsulation (including painting of materials
equipped with an automatic-start function. 3320 that contain asbestos.
C. Safety valves must be popped weekly. 1696(d) 3. Construction, alteration, repair, maintenance, or
D. Air tanks must be drained per manufacturer’s renovation of structures, substrates, or portions thereof
recommendation. 1696(c) that contain asbestos.
E. Fans shall be guarded with a shroud or side screens. 1696(b) 4. Installation of products that contain asbestos.
F. Portable air compressors on wheels must be prevented from 5. Erection of new and the improvement, alteration,
rolling. 1696(a) and conversion of existing electric transmission and
distribution lines and equipment
Asbestos 6. Excavation that may involve exposure to naturally
occurring asbestos, excluding asbestos mining and milling
activities.
The word asbestos refers to six naturally occurring, fibrous,
hydrated mineral silicates that differ in chemical composition. 7. Routine facility maintenance.
They are actinolite, amosite, anthophyllite, chrysotile, 8. Transportation, disposal, storage, and containment of
crocidolite, and tremolite. Nonfibrous forms of the last three and site housekeeping activities involving asbestos or
minerals listed here are regulated by GISO 5208.1. You may materials containing asbestos.
encounter asbestos at a construction site in the following 9. Asbestos spills and emergency cleanups.
applications and areas:
Regulatory requirements for work activities subject to 1529 vary
• Excavations where asbestos-bearing rock outcroppings are depending on the percent, the amount, or the type of asbestos-
at or near the surface containing materials involved. Listed below are selected
requirements and the activities to which they apply:
• Fireproofing for steel-frame high-rise buildings
• Pipe and boiler insulation

10 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 11