How do you safely cut a diesel tank open?

To safely cut open a diesel tank, first ensure it is completely empty and has been thoroughly cleaned to remove any residual fuel and vapors. Use a gas detector to confirm the absence of flammable fumes. Employ appropriate personal protective equipment (PPE), including gloves, goggles, and a fire-resistant suit. Utilize a cutting method that minimizes sparks, such as a plasma cutter, and have a fire extinguisher nearby for emergencies.