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… � � � � � � � � � � � � � � � � 239 Decisions on critical-use exemptions�� � � � � � � � � � � � � � � � � � � � � � � … ………………. Freezers ………………. Dehumidifiers ………………. Water coolers ………………. Ice machines ………………. Air conditioning … Testing of oil, grease and total petroleum hydrocarbons in water; (b) Testing of tar in road-paving materials; and (c) …

… carbons could harm the ozone layer and would, if their use continued unchecked, deplete the ozone layer after … plays a minor role in stratospheric photochemistry. (ii) Water (H2O) Water, the source of which is natural, plays a vital role in …