Lowest feasible concentration

OSHA PEL TWA 5 ng(Cd)/m3 ACGIH TLV TWA 0.01 mg(Cd)/mh Suspected Carcinogen NIOSH REL (Cadmium, dust and fume) lowest feasible concentration SAFETY PROFILE Confirmed human carcinogen. Poison by ingestion. Mutation data reported. When heated to decomposition it emits toxic fumes of cadmium. 

As per OSHA, workers exposure to 2-acetyl-aminofluorene is to be controlled through the required use of engineering controls, work practices, and personal protective equipment, including respirators. Identified as an occupational carcinogen without establishing a permissible exposure limit. NIOSH considers 2-acetylaminofluorene to be a potential occupational carcinogen. NIOSH usually recommends that occupational exposures to carcinogens be limited to the lowest feasible concentration. 

The National Institute for Occupational Safety and Health (NIOSH) has established a recommended exposure limit (RET) for vinylidene chloride of the lowest feasible concentration of 0.4 ppm, the limit of quantitation. NIOSH also considers vinylidene chloride to be a potential human carcinogen based on the risk of potential cancer (liver and kidney tumors in animals). 

Guide to Chemical Hazards (NIOSH 2005). The RELs are intended to be based on human and/or animal data, as well as on the consideration of technological feasibility for controlling workplace exposures to the REL. .. [whereas] [ujnder the old policy, RELs for most carcinogens were nonquantitative values labeled lowest feasible concentration (EEC) (NIOSH 2005). However, the paucity of recent cancer potency evaluations or updates makes it appear that this is not a NIOSH priority (NIOSH 2008). 

EXPOSURE GUIDELINES ACGIH TLV TWA 0.1 ppm (40 mg/m), suspected human carcinogen OSHA PEL none NIOSH REL reduce to lowest feasible concentration, potential occupational carcinogen IDLH not determined, potential occupational carcinogen. 

Potential occupational carcinogen occupational exposure should be limited to the lowest feasible concentration. 

When thresholds for carcinogens that would protect 100% of the population had not been identified, NIOSH usually recommended that occupational exposures to carcinogens be limited to the lowest feasible concentration. To ensure maximum protection from carcinogens through the use of respiratory protection, NIOSH also recommended that only the most reliable and protective respirators be used. These respirators include (1) a self-contained breathing apparatus (SCBA) that has a full facepiece and is operated in a positive pressure mode, or (2) a supplied air respirator that has a full facepiece and is operated in a pressure demand or other positive pressure mode in combination with an auxiliary SCBA operated in a pressure demand or other positive pressure mode. 

NIOSH recommends reducing exposures to cotton dust to the lowest feasible concentration to reduce the prevalence and severity of byssinosis the REL is <0.200 mg/m (as lint free cotton dust). 

OSHA regulates polychlorinated biphenyls under the Hazard Communication Standard and as chemical hazards in laboratories. OSHA s PEL on an 8-hour TWA for chlorodiphenyls containing 42% chlorine is 1 mg/m. Its PEL on chlorobiphenyls containing 54% chlorine is 0.5 mg/m. These standards are based on the toxic effects other than cancer. NIOSH recommends the exposure to PCBs be controlled to the lowest feasible concentration. 

Ca = NIOSH potential occupational carcinogen (if no value listed, NIOSH recommends occupational exposure to the lowest feasible concentration)... 

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