Permissible exposure limit , for

PPS dust should be treated as a nuisance particulate. The OSHA permissible exposure limit for respirable dust is 5 mg/m for dust containing no asbestos and less than 1% siUca. The principal decomposition products released during mol ding of PPS and their permissible exposure limits are given in Table 10. Sulfur dioxide and carbonyl sulfide are the most significant off-gases for production of mucous membrane irritation. 

The handling of arsenic in the workplace should be in compliance with the Occupational Safety and Health Administration (OSHA) regulations the maximum permissible exposure limit for arsenic in the workplace is 10 p-g/m of air as deterrnined as an average over an 8-h period (33). 

Short term exposure limit (STEL) T he permissible exposure limit for a given contaminant averaged out over any 10-minute period during an 8-hour working shift. See also Occupational exposure limit (GEL) and Long-term exposure limit (LTEL). 

THRESHOLD LIMIT VALUE DS2 is made of two major components (EGME DETA) with different toxicities and physical properties. The TLV of the mixture (calculated) is 5.2 mg/m3 as an 8-hour time weighted average (TWA). To date the Occupational Safety and Health Administration (OSH A) has not promulgated a permissible exposure limit for DS2 nor has the value proposed been officially adopted as a part of a special occupational safety and health standard for DS2 according to DOD 6055.1. 

The results for recommended (REL) and permissible (PEL) exposure limits in air for safeguarding health in the workplace are presented in Table 6-1. The REL value is die recommended exposure limit by the NIOSH (National Institute for Occupational Safety and Health). The PEL value is the permissible exposure limit for maintaining health as provided by OSH A (Occupational Safety and Health Act). Both REL and PEL values apply to a 40 hour workweek. The last column in the tabulation provides IDLH (immediately dangerous to life or health) values. The tabulation also provides the freezing and boiling point temperatures which are helpful in determining whether the substance is a gas, liquid or solid at ambient conditions. 

The standard presents OSHA s determination that exposure to cotton dust presents a significant health hazard to employees and establishes permissible exposure limits for selected processes in the cotton industry and for non-textile industries where there is exposure to cotton dust. The cotton dust standard also provides for employee exposure monitoring, engineering controls and work practices, respirators, employee training, medical surveillance, signs and record keeping. 

The United States Occupational Safety and Health Administration (OSHA) (1996) has established 0.0001 mg/m as the permissible exposure limit for occupational exposures to l,2-dibromo-3-chloropropane in workplace air. 

A mercury spill occurs in an unventilated stockroom with some of the mercury trapped in several floor cracks. What is the maximum concentration of mercury that can be attained in the storeroom when the temperature is 23°C If the Federal standard permissible exposure limit for mercury in the air is 0.1 mg/m3, is the maximum concentration of mercury in the air acceptable ... 

Benzene, toluene, ethylbenzene, and xylenes (known as BTEX) are probably the most widely used aromatics, in abimdant use in automotive fuel, as solvents or as feedstock for more complex compounds. The American Occupational and Safety Administration (OSHA) permissible exposure limit for benzene, for example, is as low as 3.26 mg m (Ippm) due to its carcinogenic nature. This value should be compared with the 10-100 Xgm of BTEX typically foimd in urban outdoor environment (Saarela et al., 2003). The photocatalytic degradation of BTEX might emit a variety of intermediate products and by-products. For example, the photocatalytic degradation... 

The US Occupational Safety and Health Administration (OSHA) permissible exposure limits for hydrogen sulfide is 10 ppm (time weighted average) for an eight-hour exposure and 15 ppm (shortterm exposure limit). The transitional limits are 20 ppm (ceiling) and 50 ppm (peak - ten-minute exposure). 

Carbon dioxide is included in the OSHA list of air contaminants. The OSHA permissible exposure limits for C02 are 5000 ppm or 9000 mg/m3 TWA for an eight-hour exposure. 

The GHS is not intended to harmonize risk assessment procedures or risk management decisions (such as establishment of a permissible exposure limit for employee exposure), which generally require some risk assessment in addition to hazard classification. In addition, chemical inventory requirements in various countries are not related to the GHS... 

The Occupational Safety and Health Administration permissible exposure limits for various corrosives are as follows glacial acetic acid, 10 ppm acetic anhydride, 5 ppm hydrofluoric acid, 3 ppm sulfuric acid, lmgm oxalic acid, lmgm nitric acid, 2 ppm bromine, 0.1 ppm chlorine, Ippm fluorine, 1 ppm hydrochloric acid, 5 ppm. 

The Occupational Safety and Health Administration permissible exposure limit for 1,4-dioxane in air is 100 ppm (360mgm ) for an 8h work shift. The National Institute for Occupational Safety and Health recommended exposure limit (REL) is Ippm (3.6 mg m ), which should not be exceeded in a 30 min period. The American Conference of Governmental Industrial Hygienists REL is 20 ppm averaged... 

The Occupational Safety and Health Administration permissible exposure limit for phosphine is 0.3 ppm (averaged over an 8h work shift). 

The reference dose for rotenone is 0.004 mg kg day . The 8h permissible exposure limit for rotenone is 5mgm . ... 

In the working environment, a principal concern is to ensure that the exposure to elemental phosphorus in air is kept below O.lmg/m, which is the time weighted average permissible exposure limit for workers (TWA, PEL)... 

Permissible Exposure Limits for workroom air specified under the Occupational Safety and Health Act... 

One more complicating factor must now be considered the effect of duration of exposure. Consider the data shown in Table 20. In each of the rows, the Ct product = 100 mg min m-3. In the rows (c), (d) and (e), one might feel reasonably confident that the mortality likely to occur would be about 50%, i.e. an LCtso exposure. At the outer rows, one becomes distinctly less confident and it is unlikely that continuous exposure of a person to 0.0001 mg m 3 GB for 1.9 years would have the same effect as exposure to 10 mg m 3 for 10 min. Interestingly, the US permissible exposure limit for GB (expressed as an 8-h time-weighted average (TWA), is 0.0001 mg m 3 such an exposure, on a daily, life-long basis, would be regarded as safe. 

The primary route(s) of entry and permissible exposure limit (for those hazardous chemicals for whch OSHA has promulgated a permissible exposure limit) ... 

PERSONAL PROTECTION wear full protective clothing, including chemical-resistant gloves, apron or coveralls wear dust-proof safety goggles or face shields during operations an enclosed system of local exhaust ventilation is recommended to control emissions at the source and to prevent dispersion into general work area appropriate respirators are needed in areas where exposure would be above the permissible exposure limits for extra personal protection, wear self-contained breathing apparatus maintain eyewash baths and safety showers in work area. 

PEL - OSHA-regulated permissible exposure limit for occupational exposure, as an 8-hour time weighted average... 

CFR1910.1450(f)(3)(iii) 4.2.1.2 The permissible exposure limits for OSHA-regulated substances or recommended exposure limits for other hazardous chemicals where there is no apphcable OSHA standard ... 

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