Physical hazards TLVs

A substance is a hazardous chemical if it is a physical hazard or a health hazard . A flammable or explosive liquid is a physical hazard . A flammable liquid means any liquid having a flash point below 110°F (37.8°C), except any mixture having components with flash points of 100°F (37.8°C) or higher, the total of which make up 99% or more of the total volume of the mixture . Health hazard means a chemical for which there is statistically significant evidence based on at least one valid study that acute or chronic health effects may occur in exposed employees . Hexane and all the solvents listed in Table 13.10.3 would require a MSDS, since all are flammable liquids (physical hazards) as defined by OSHA and/or possible health hazards because all, except hexane isomers, have an U.S. OSHA PEL. However, hexane isomers have an American Conference of Industrial Hygienist (ACGIH) dneshold limit value (TLV), which many states and countries enforce as a mandatory standard. 

Chromic told Is actually chromium trioxide and Its aqueous solution. Flush contaminated clothing with water (fire hazard). No TLV for dichromate/sulfuric acid solution TLVs of components (chromium trioxide and sulfuric acid) are O.OSmg/m and 1mg/m (STEL 3mg/m ) respectively. Lung edema symptoms usually develop several hours later and are aggravated by physical exertion rest and hospitalization essential. As first aid, a doctor or authorized person should consider administering a corticosteroid spray. UNDER NO CIRCUMSTANCES add water to acid when diluting ALWAYS add acid to water. 

CAS No. is the Chemical Abstracts Service Registry Number PEL is from 29 CFR 1910.1000, Table Z-1 American Conference on Governmental Industrial Hygienists (ACGIH), threshold limit value (TLV) under the HCS, a MSDS is required for aU of the compounds (physical and/or chemical hazard) all of the solvents are flammable liquids or gasses, under the OSHA definition, and are regulated under the PSM Standard. 

The ALARA policy and philosophy v h regard to hazardous materials, as specified in the ES H Manual (SNL 1998), is to control personnel exposure such that neither the Occupational Safety and Health Administration (OSHA) Permissible Exposure Limits (PELs) nor the American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Values (TLVs) are exceeded. Exposure to hazardous material in HCF work areas is maintained ALARA through proper facility design, equipment layout, PPE, physical controls (e.g., confinement and ventilation), and administrative controls. 

OSHA continues to recommend that employees exposure be limited to the more protective level of either the National Institute of Occupational Safety and Health (NIOSH) Recommended Exposure Levels (RELs) or the ACGIH TLVs. OSHA can issne citations for violation of the general duty clause [Section 654(a)(1)]. The general dnty clause states that each employer shall furnish to each of his employees employment and a place of employment which are free from recognized hazards that are causing or likely to cause death or serious physical harm to his employees. ... 

It is most important that TLV data be correctly used. Misuse can occur when uninformed individuals view these levels as magic numbers, below which workers are safe and above which they become ill. It should be remembered that there is wide variation in individual susceptibility to air contaminants and physical agents. Some workers may experience some discomfort from expo.sures at or below the TLV, and a much smaller number may be affected more. seriously by aggravation of a pre-existing condition or by development of an occupational illness. Therefore, the TLV s as published were intended to be used only as guides in the control of health hazards and not as levels which separate safe from dangerous exposures. In addition, a TLV is not intended as a relative index of hazard or toxicity, nor to be mathematically manipulated by applying foysical con.stants to derive a relative hazard. 

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