tailieunhanh - Environmental Chemicals III

Explore the Montana Pole Superfund site. • Examine methods for treatment of PCP contaminated soils and waters. • Explore the history, science and risk issues surrounding the Hudson River, NY PCB contamination. | Environmental Chemicals III Principles of Environmental Toxicology Instructor Gregory Möller . University of Idaho Principles of Environmental Toxicology Learning Objectives Explore the Montana Pole Superfund site. Examine methods for treatment of PCP contaminated soils and waters. Explore the history science and risk issues surrounding the Hudson River NY PCB contamination. Principles of Environmental Toxicology Montana Pole Site The Montana Pole and Treating site is an abandoned forty-acre wood treatment facility in Butte Montana. From 1946 to 1983 the facility preserved utility poles posts and bridge timbers with pentachlorophenol PCP . Hazardous substances from the pole-treating operations were discharged into a ditch next to the plant that ran towards Silver Bow Creek. EPA Principles of Environmental Toxicology Receptors and Controls The site is in a residential and industrial area. - The nearest residence is 100 yards away. EPA - The nearest private well is located one fifth mile down gradient from the site. Federal and state agencies are addressing soil and groundwater contamination as well as waste products on site. Contaminated soil currently is being treated with bioremediation in an on-site land treatment unit. Principles of Environmental Toxicology Removal Actions About 16 000 gallons of PCP contaminated waste oil were sent to a licensed disposal facility in Utah for incineration in the 1980s. - In spring 1998 forty drums of PCP contaminated sludge were shipped to Utah. The State of Montana signed an agreement with a contractor in March 1999 to dispose of all remaining site debris. EPA Principles of Environmental Toxicology Contamination The ground water and soils at the Montana Pole site are contaminated with PCPs dioxins furans flammable liquids from wood oils volatile organic compounds VOCs and metals. The sludge also is contaminated with PCPs dioxins and furans. PCP has been detected in Silver Bow Creek. Principles of Environmental Toxicology .