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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
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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. These refrigerants must be
<br /> recovered by technicians certified by a U.S.EPA approved program using proper refrigerant
<br /> recovery equipment.
<br /> • Esamples 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
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<br /> •Some fire estinguishers contain halons which destroy the ozone layer.
<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 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 /> •Iialons are also found in some portable fire extinguishers.
<br /> Halon fire extinguishers must be removed from the facility prior to demolitiou.
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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 tiVaste
<br /> Manaaement Plans (IS�'Vl-Ip) that allotiv them, under special provisions, to accept some of the
<br /> following materials.
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