Page 68 - Safety Memo

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3. Tanks Illustration 3 | Retrieval Equipment in Use
4. Vaults
5. Wells and shafts
6. Crawl spaces
7. Ducts
8. Compartments
9. Pits, tubs, and bins
10. Pipelines
C. Employers must check initially and if conditions can change,
they must check on an ongoing basis to discern whether work
locations exhibit confined-space conditions.
If confined-space conditions have been identified, the following
must be completed before employees may begin work:
1. Written operating procedures must be prepared and
employees must be trained. 5158(c)(1),(2)
2. Lines containing hazardous substances must be
disconnected, blinded, or blocked. 5158(d)(1)
3. The space must be emptied, flushed, or purged. 5158(d)(2)
4. The air must be tested for dangerous contamination or
oxygen deficiency. 5158(d)(5)(A)
5. Ventilation must be provided if testing reveals any
atmospheric hazard. 5158(d)(6)
6. Ongoing atmospheric testing for dangerous air
D. Working in a confined space where dangerous air contamination and oxygen deficiency. 5158(d)
contamination exists requires:
7. Ongoing surveillance of the surrounding area to avoid
1. Appropriate respiratory protection. 5158(d)(11), 5158(e)(1)
hazards, such as vapors drifting from nearby tanks,
2. Provisions for ready entry and exit where feasible. piping, sewers, and operations. 5158(c)(1)(B)
5158(d)(10)

3. The wearing of a safety harness attached to a retrieval line Corrosive Liquids
and retrieval equipment (Illustration 3). 5158(e)(1)(C),(E)
Employers must provide the following when employees handle
Exception: See 5158(e)(1)(C) corrosives:
4. One stand-by employee (with entry gear) trained in first • Personal protective equipment. 1514(a)
aid and cardiopulmonary resuscitation plus one additional
employee within sight or call. 5158(e)(1),(2) • Safety data sheet (SDS) in English. 5194(g)
5. Effective means of communication between the employee in • Properly labeled containers with appropriate hazard
the confined space and the standby employee. 5158(e)(2) warnings. 5194(f)

24 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 Cal/OSHA Pocket Guide for the Construction Industry | June 2015 25