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• City Inspections Department and local well contractors. ' <br /> Another way in which to identify unsealed wells is to look for clues: some clues are: <br /> • windmills, usually would use wind power to draw water out of a well <br /> • unaccounted for pipes or areas in the foundation where pipes used to run <br /> • the building was constructed and occupied prior to municipal water being available to that area <br /> ♦ well pits or shacks <br /> a magnetometer may be used to identify metallic objects within 3-4 feet underground <br /> .:........ ::. Vis:. .::�::...... <br /> .. .... ... ........n...a........:iiiiii '....:......��3:.::i:i'::::CJ:iiiii:6iYi::.i:iiiii::.:..iiiiii::i:iii:•i5ii:iii:::}::ii:•i:i::.. <br /> •CFCs (chlorofluorocarbons) and HCFCs (hydrochlorofluorocarbons) are man-made refrigerants <br /> that destroy the ozone layer. <br /> •CFCs and HCFCs must not be released into the atmosphere. These refrigerants must be <br /> recovered by technicians certified by a U.S. EPA approved program using proper refrigerant <br /> recovery equipment. <br /> • Examples of appliances that contain CFCs and HCFCs include: <br /> ♦ refrigerators ♦ dehumidifiers ♦ central air conditioners <br /> ♦ room air conditioners ♦ vending machines ♦ heat pumps <br /> • freezers + chillers • ice machines <br /> I • food display cases 1 • water coolers I <br /> •Refrigerant substitutes (including HFC-134a) must also be recovered and not vented to the <br /> atmosphere. <br /> ................::::::: <br /> •Some fire extinguishers contain halons which destroy the ozone layer. <br /> •Halons must be recaptured when recharging, servicing, or retiring_the unit. There are a number <br /> of companies in Minnesota that have the proper halon recovery equipment. <br /> •Halons can be used as total flooding agents in areas such as computer rooms, libraries, spaces <br /> floors, and near electronic and medical equipment. <br /> • <br /> • <br /> •Halons are also found in some portable fire extinguishers. <br /> Halon fire extinguishers must be removed from the facility prior to demolition. <br /> £.[701 1, <br /> AN'DFf L ACCEPTABLE Al\D ACCEP : .::.,.,.:> ;:: ;: <br /> In the disposal of demolition debris, certain materials may or may not be acceptable at the <br /> Demolition Land Disposal Facility (Demo LDF). Certain Demo LDFs have Industrial Solid Waste <br /> Management Plans (ISWMP) that allow them, under special provisions, to accept some of the <br /> following materials. <br /> 4 <br />