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0 0 <br />SITE HEALTH & SAFETY PLAN <br />3.0 JOB HAZARD ANALYSIS <br />The possible major contaminants to be encountered on the <br />project are Petroleum Hydrocarbons and Volatile Organic <br />Compounds (VOCs). <br />There is currently no known air concentration data <br />available for VOCs emissions in the direct breathing <br />zone of personnel working around the piezometers or <br />exposed soils. <br />Inhalation and dermal (absorption) hazards are the major <br />area of concern, regarding the exposure to VOCs. <br />Results of toxicological studies on animal exposure to <br />pure concentrations of the VOCs that have been detected <br />at the site are detailed in "Handbook of Toxic and <br />Hazardous Chemicals", by M. Sittig (1981), and <br />"Dangerous Properties of Industrial Materials", by N. <br />Irving Sax (1984). An additional reference source used <br />for the development of this Site Safety Plan is the <br />"Documentation of the Threshold Limit Values", published <br />by the ACGIH (American Conference of Governmental <br />Industrial Hygienists, Inc. <br />Gasoline <br />Gasoline has an appearance of a clear, aromatic, <br />volatile liquid, and is a mixture of aliphatic <br />hydrocarbons. The flash point is listed at -500F, and <br />has an LEL (Lower Explosive Limit) of approximately <br />1.3%. <br />The TLV for gasoline is listed as 300 ppm in air. <br />Diesel Fuel <br />This material currently has no TLV specifically adopted <br />by NIOSH. However, it has been listed as a suspect <br />carcinogen, and is currently being tested for <br />carcinogenicity. <br />Benzene <br />Benzene is a common constituent of gasoline and other <br />petroleum product materials. It is a clear, colorless <br />liquid, with a flash point listed at 120F. <br />The currently established TLV for Benzene is 10 ppm in <br />air. However, the American Conference of Governmental <br />Hygienists (ACGIH) has recommended a TLV of 1 ppm be <br />adopted. <br />3 <br />