When working in confined spaces, it's crucial to ensure adequate ventilation to prevent the build-up of hazardous atmospheres 1, 2, 3, 4, 5, 6, 8, 13. Remove any ignition sources to avoid fires or explosions 1, 2, 3, 4, 6, 8. Use appropriate personal protective equipment (PPE) as required 1, 2, 3, 4, 5, 6, 7, 8, 9, 15, 16, 17, 18. If a spill occurs, contain it with a vapor suppressing foam or absorbent material, using non-sparking tools 1, 2, 3, 8, 13. Always follow safety guidelines and regulations to minimize risks.