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A methodology for assessing risk from released hydrocarbon in an enclosed area
Institution:1. Victorian Adult Burns Service, The Alfred Hospital, Alfred Health, Melbourne, Victoria, Australia;2. Department of Surgery, School of Medicine, Faculty of Health, Deakin University, Melbourne, Victoria, Australia;3. Department of Medicine, St Vincent''s Clinical School, Faculty of Medicine, Dentistry & Health Sciences, The University of Melbourne, Melbourne, Victoria, Australia;4. The Epworth Hospital, Melbourne, Victoria, Australia;5. Department of Surgery, Central and Eastern Clinical School, Faculty of Medicine, Nursing & Health Sciences, Monash University, Melbourne, Victoria, Australia;6. Department of Epidemiology and Preventive Medicine, The Alfred Hospital, Faculty of Medicine, Nursing & Health Sciences, Monash University, Melbourne, Victoria, Australia;1. ZAG-Slovenian National Building and Civil Engineering Institute, Fire Laboratory and Fire Engineering, Dimičeva 12, SI-1000 Ljubljana, Slovenia;2. ZAG-Slovenian National Building and Civil Engineering Institute, Department of Building Physics, Dimičeva 12, SI-1000 Ljubljana, Slovenia;1. Department of Construction and Technology in Architecture, Escuela Técnica Superior de Arquitectura, Technical University of Madrid, Spain;2. Escuela Técnica Superior de Arquitectura, Universidad Europea de Canarias, Spain
Abstract:This study presents a method for calculating the concentration of hydrocarbon releases in enclosed areas using empirical equations for the evaporation rate. The approach of the method is to estimate the hydrocarbon exposure concentration in the air under conditions assumed. A methodology for assessing risk to individual exposed workers or others using probit expressions is suggested. The toxicity criteria and available human exposure data were examined and guidelines for risk assessment suggested for benzene–air and toluene–air systems. The values of probit constants with mole fractions of lethal concentrations in a mixture of hydrocarbons and a non-toxic substance were predicted. The probit values calculated with mole fractions can be used to estimate guidelines to prevent toxicity within enclosed working areas.
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