Waste Materials Physical contact with used motor oil may pose a health risk. Wipe oil from your hands promptly and wash off any remaining residue. X Used motor oil is an environmental contaminant and may only be disposed of at approved collection facilities. To prevent pollution of the environment, always do the following: Never dump waste oil in a sewer system, rivers, etc. Always put oil drained from your machine in containers. Never drain oil directly onto the ground. Figure 42 HAOA470L Obey appropriate laws and regulations when disposing of harmful materials such as oil, fuel, solvent, filters, and batteries. OP001759 1-41 Safety