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2.3 OTHER HAZARDOUS MATERIALS PCBs: PCBs belong to a broad family of man-made organic chemicals known as chlorinated hydrocarbons. PCBs were domestically manufactured from 1929 until their manufacture was banned in 1979.They have a range of toxicity and vary in consistency from thin, light-colored liquids to yellow or black waxy solids. Due to their non-flammability, chemical stability, high boiling point, and electrical insulating properties, PCBs were used in hundreds of industrial and commercial applications including electrical, heat transfer, and hydraulic equipment; as plasticizers in paints, plastics, and rubber products; in pigments, dyes, and carbonless copy paper; and many other industrial applications. Congress banned the manufacture of PCBs in the United States in 1976 because of their toxic effects. In July of 1979, EPA phased out the processing or use of PCBs, except in totally enclosed equipment. However, a large number of FLBs that were installed prior to the ban, or that were stored and later used after the 1979 phase-out, may contain PCBs and may still be in use in U.S. schools. EPA regulations also require that all FLBs built between July 1, 1978 and July 1, 1998 that do not contain PCBs must be labeled "No PCBs." Mercury: Management and disposal by businesses of fluorescent light bulbs and other mercury-containing bulbs are regulated under the Resource Conservation and Recovery Act (RCRA) Universal Waste Rule (UWR) and Subtitle C hazardous waste regulations. All fluorescent bulbs contain some amount of mercury, generally ranging from 3.5-8mg. Follow state laws regarding proper disposal. Mercury-containing equipment means a device or part of a device (including thermostats, but excluding batteries and lamps)that contains elemental mercury integral to its function. Lead: Lead paint or lead-based paint is paint containing lead. As pigment, lead(II) chromate (PbCr04, "chrome yellow") and lead(II) carbonate (PbCO3, "white lead") are the most common forms. Lead is added to paint to speed up drying, increase durability, maintain a fresh appearance, and resist moisture that causes corrosion. It is one of the main health and environmental hazards associated with paint. In countries such as the U.S. and the U.K. have regulations prohibiting this, although lead paint may still be found in older properties painted prior to the introduction of such regulations. Although lead has been banned from household paints in the United States since 1978, paint used in road markings may still contain it. Page 6 of 23