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Roseville Review 8/3/10 <br /> "When asked whether or not they had conducted a risk assessment study for <br /> potential accidents, such as spills or explosions, MPCA officials admitted they had <br /> not. However, Peterson said the likelihood of a spill is slim to none, since the <br /> asphalt at the plant would be nearly solid." <br /> Roads Bridges trade magazine article with five case studies of fires and explosions <br /> at asphalt plants <br /> "Asphalt plants can be very dangerous places. Accidents, sometimes fatal, <br /> happen far too often. Most can be traced to the same root cause: the need for <br /> production superseding common sense and normal safety practices." <br /> Material Safety Data Sheet 7/1/06 <br /> unmoor ter. and Explosion Simonds: <br /> Do not heat above flash point;. Fumes/vapors can explode when concentrated in an enclosed environment and supplied with an ignition soma. Neva <br /> weld or use a cutting torch or open flame on a full. partially full or empty bin, hopper, or other coataineis that holds or has held asphaltic material <br /> unless precautions ate taken to prevent explosion. Adding water to hot asphalt presents an explosion haaard. <br /> WARNING: Hydrogen sulfide (HA) and other hazardous gases/vapors tray evolve and collect in the headspace of storage tanks or other enclosed <br /> vessels, and can create an explosive, toxic, or oxygen deficient atmosphere. H,S gas is extremely flammable and can explode Wan ignition source is <br /> provided. See Sections 3 and 11 for health effects of II,S gas. <br /> Title Better understanding needed for asphalt tank explosion <br /> hazards <br /> Author(s) David Trumbore; Charles Wilkinson <br /> Document Oil Gas Journal <br /> Date 09/89 <br /> I <br /> Abstract In spite of the extensive use of hot asphalt for over a <br /> century, little has been published on the nature of <br /> explosion hazards in its storage tanks. Most of what has <br /> been published has emphasized that the flash point of the <br /> material stored is the most important factor in determining <br /> if enough fuel is present in the vapor space for combustion. <br /> It is hoped that the clearer view of asphalt tank safety <br /> presented in this article will lead to better engineering <br /> practice with asphalt tanks and fewer explosions in asphalt <br /> plants. <br /> Submittal by Neighbors Against the Asphalt Plant November 29, 2010 page 4 of 4 <br />