Containment Exposure limit

An exposnre of an individual relates directly to the concentration of a hazardous substance as related to the per-unit volume of air. We usually express airborne concentrations in terms of milligrams of substance per cubic meter of air (mg/m ) or parts of substance per million parts of air (ppm). Express asbestos and other airborne fibers by using per cnbic centimeter (f/cc) or fibers per cubic meter (f/m ) of air. OSHA requires consideration of feasible administrative or engineering controls to reduce exposure risks. When these controls prove ineffective, organizations must use PPE or other protective measures to protect employees. Ensure that the use of any equipment and/or technical measures receive approval from a competent industrial hygienist or other technically qnalified person. 29 CFR 1910, Subpart Z, contains exposure limit Tables Z-1, Z-2, or Z-3 for substances not covered by a specific standard. 

Exposure to formic acid vapor causes irritation of the eyes and respiratory tract. The TLV/TWA occupational exposure limit is 5 ppm (40). Self-contained breathing apparatus should be used when there is a risk of exposure to high vapor concentrations. 

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. 

OSHA and ACGIH have not estabhshed specific airborne exposure limits for PVB and PVF resias however, some products may contain sufficient fines to be considered nuisance dust and present dust explosion potential if sufficient quantities are dispersed ia air. Unformulated PVB and PVF resias have flash poiats above 370°C. The lower explosive limit (lei) for PVB dust ia air is about 20 g/m. ... 

Beryllium, beryllium-containing aUoys, and beryUium oxide ceramic in soHd or massive form present no hazard whatsoever (31). SoHd shapes may be safely handled with bare hands (32) however, care must be taken in the fabrication and processing of beryUium products to avoid inhalation of airborne beryUium particulate matter such as dusts, mists, or fumes in excess of the prescribed workplace exposure limits. Inhalation of fine airborne beryUium may cause chronic beryUium disease, a serious lung disease in certain sensitive individuals. However, the vast majority of people, perhaps as many as 99%, do not react to beryUium exposure at any level (33). The biomedical and environmental aspects of beryUium have been summarized (34). 

Calcium is readily abundant in the mammalian diet. A 70 kg human contains approximately 1200 g of calcium and has a daily intake of 1100 mg/day. There are no pubHshed exposure limits (38). Low levels of calcium in the blood, hypocalcemia, can lead to tetany high levels, hypercalcemia, can lead to coma and death. Calcium toxicity, above 160 mg/L in the blood, is not related to an excessive intake of calcium. 

Information pertaining to the hazards of the chemicals used in the process. This should contain at least the following information toxicity, flammability, permissible exposure limits, physical data, reactivity data, corrosivity data, thermal and chemical stability data, and hazardous effects of inadvertent mixing of different materials that could occur. 

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