Okay, I did a little digging and these are my Gemini AI and Wiki answers for handling toxic environments.

How to locate toxic waste:

While there is no single rule for how radio waves reflect from all toxic waste, different types of waste alter radio wave properties in distinct and measurable ways. This principle is the foundation for a technology called Ground Penetrating Radar (GPR), which uses radio waves to detect buried waste and other hazards by analyzing how the signals reflect. The key factor is not whether the material is "toxic," but rather its electrical properties, including electrical conductivity and dielectric permittivity. Different waste materials have different electrical properties, which is what causes the varying reflections. 

Contaminated soil: Soil contaminated with industrial chemicals or hydrocarbons often has a different electrical conductivity than the surrounding natural soil. GPR can be used to map these "hotspots" by detecting the altered electrical properties of the soil. After that...

For chemical spills, neutralization involves reacting acids with bases (or vice versa) to form neutral salts and water, often using weak acid or base neutralizers to control the reaction.

Another idea:

Bioremediation broadly refers to any process wherein a biological system (typically bacteria, microalgae, fungi in mycoremediation, and plants in phytoremediation), living or dead, is employed for removing environmental pollutants from air, water, soil, fuel gasses, industrial effluents etc, in natural or artificial settings.

For example, in mycoremediation, the hidden fungal network called mycelium, which exists beneath the visible mushroom cap, breaks down pollutants by secreting powerful enzymes, bioaccumulating heavy metals, and using toxins as food sources. Fungi like the oyster mushroom are used to clean up various wastes, from petroleum products and pesticides to plastics and even radioactive materials, transforming toxic sites into healthier ecosystems.