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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 t�that area
<br /> ♦ well pits or shacks
<br /> � a magnetometer may be used to identify metallic objects within 3-4 feet underground
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<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. �'hese 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 /> ♦ food display cases ♦ water coolers
<br /> �Refrigerant substitutes (including HFC-134a) must also be recovered and not vented to the
<br /> atmosphere. •
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<br /> �Some fire extinguishers contain halons which destroy the ozone layera
<br /> •Halons must be recaptured when recharging, servicing, or retirin�the unit. There are a number
<br /> of companies in Minnesota that have the proper halon recovery equip�aaent. '
<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 /> •Halons are also found in some portable fire estinguishers.
<br /> Halon fire extinguishers must be removed from the facility prior to demolition.
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<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`Vaste
<br /> Management Plans (ISWMP) that allow them, under special provisions, to accept some of the
<br /> follo�ving materials.
<br /> � 4
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