What is the OSHA permissible exposure limit for CO?
50 parts per million
The OSHA PEL for CO is 50 parts per million (ppm). OSHA standards prohibit worker exposure to more than 50 parts of CO gas per million parts of air averaged during an 8-hour time period. The 8-hour PEL for CO in maritime operations is also 50 ppm.
What is the exposure limit for mercury?
0.05 mg/m3
OSHA: The legal airborne permissible exposure limit (PEL) is 0.1 mg/m3 averaged over an 8-hour workshift. NIOSH: The recommended airborne exposure limit (REL) is 0.05 mg/m3 (as Mercury vapor) averaged over a 10-hour workshift and 0.1 mg/m3 (as Mercury), not to be exceeded at any time.
What is acceptable level of CO?
0-9 ppm CO: no health risk; normal CO levels in air. 10-29 ppm CO: problems over long-term exposure; chronic problems such as headaches, nausea. 30-35 ppm CO: flu-like symptoms begin to develop, especially among the young and the elderly.
What is the carbon monoxide acceptable limit in a confined space?
50 ppm
The OSHA PEL for carbon monoxide is 50 ppm, calculated as an 8-hour TWA limit. The NIOSH Recommended Exposure Limit (REL) consists of a two part definition, an 8 hour TWA limit of 35 ppm, and a ceiling limit of 200 ppm.
Is it legal to own liquid mercury?
Effective January 1, 2003, the California Mercury Reduction Act banned the sale of many products containing mercury. Even though they are banned from California’s marketplace, these mercury containing products still are frequently found in homes.
Can mercury rust?
Mercury is a fairly unreactive metal and is highly resistant to corrosion.
What is the permissible exposure limit PEL for hexavalent chromium?
52 to 5 micrograms
The new standard lowers OSHA’s permissible exposure limit (PEL) for hexavalent chromium, and for all Cr(VI) compounds, from 52 to 5 micrograms of Cr(VI) per cubic meter of air as an 8-hour time- weighted average.
What is the action level what is the 8-hour permissible exposure limit?
During an 8-hour work shift, an employee may be exposed to a concentration of Substance A (with a 10 ppm TWA, 25 ppm ceiling and 50 ppm peak) above 25 ppm (but never above 50 ppm) only for a maximum period of 10 minutes.
What is the NIOSH Recommended exposure limit for carbon monoxide (CO)?
[NIOSH REL] The National Institute for Occupational Safety and Health (NIOSH) has established a recommended exposure limit (REL) for carbon monoxide of 35 ppm (40 mg/m(3)) as an 8-hour TWA and 200 ppm (229 mg/m(3)) as a ceiling [NIOSH 1992]. The NIOSH limit is based on the risk of cardiovascular effects. [ACGIH TLV]…
What are the exposure limits for mercury vapor?
The following exposure limits are for Mercury vapor: OSHA: The legal airborne permissible exposure limit (PEL) is 0.1 mg/m3, not to be exceeded at any time. NIOSH: The recommended airborne exposure limit is 0.05 mg/m3 averaged over a 10-hour workshift and 0.1 mg/m3, not to be exceeded during any 15 minute work period.
What are the recommended exposure limits (RELs) for chemicals?
(g) National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limits (RELs) from the NIOSH Pocket Guide to Chemical Hazards ( https://www.cdc.gov/niosh/npg) (Web site last accessed on October 18, 2019). RELs are for up to 10-hour time weighted averages (TWAs) during a 40-hour work week unless otherwise indicated.
What is the NIOSH standard for carbon black?
Click here for permission request form. 3.5 mg/m 3 (without PAHs); when PAHs are present, NIOSH considers carbon black to be a potential occupational carcinogen. Exposure by all routes should be carefully controlled to levels as low as possible.