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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 /> ;::::::: :::>;:::::>::::::::::::''::.;. >::::::•:::::. <br /> �� `` ;.: ..::. , <br /> ;:: >:::`;;:::> �:':::::::::;::::>>:>:.; ; luG� <br /> _ : <br /> �A�t�'S.�C`�CsIHC��� :< <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 /> ♦ food display cases ♦ water coolers <br /> •Refrigerant substitutes (including HFC-134a) must also be recovered and not vented to the <br /> atmosphere. <br /> _ <br /> _ <br /> ; FIRE EX�`II�T�II�S�ER� > ;;: <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 equiprsPnt. � <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. <br /> ; , <br /> > <br /> �a��v�a��o��.��v��r�r. ��c��r�B�� ��� �Aec�rT����`��s�s <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 /> i�lanagement Plans (IS`V�IP) tbat allow them, under special provisions, to accept some of the <br /> following materials. <br /> 4 <br />