17. To avoid spontaneous combustion, discard waste rags into approved metal waste cans. 18. Never store flammable liquids or gases in vicinity of compressor. 19. When spraying with solvent of toxic chemicals, follow instructions provided by the chemical manufacturer. 20. Spray in a well ventilated area, to keep fumes from collecting and causing health and fire hazards. 21. Do not spray in vicinity of open flames or other places where a spark can cause ignition. Do not smoke when spraying paint,