I am not sure this is the best, but I would advise immediate liming of affected area to increase soil pH and help precipitate heavy metal contaminants and hold them in place, so you may have more time to figure this out what to do before groundwater gets contaminated. Rain is typically acidic, and the low pH helps to dissolve and mobilize heavy metals. Hopefully you might find or build toxic material containment site, where excavated contaminated soils can be deposited, contained, and managed for breakdown. There might be some ways to recover some types of contaminants, such as recovering lead from gun ranges. Hiring an individual or company trained in evaluating and handling hazardous materials as well as addressing the needs for monitoring is another option to address urgent issues. A proper mining plan should have been required, with performance bond, emergency spill plans when mining companies plan to use hazardous materials, build containment ponds (that fail sometimes), intend to use and store hazardous materials, etc.
The best modern environmentally friendly methods to remove lead, arsenic, cadmium and nickel from contaminated soil by converting them into non-hazardous dissolved metal complexes on the environment and soil
Hello, The extraction of heavy metals in soil and mine water is a serious problem. With the liming method, the increase in pH will make it possible to precipitate certain metals in the hydroxyl form. Anyway the problem remains because after the slightest rain the metals are found in the surrounding waters. It is therefore essential, for a large amount of treatment, to couple the method liming with a leaching and a solid-liquid extraction of the heavy metals contained in the water by a clay (the smectite). The clay goes in sum, trapping the heavy metals between its layers due to its high specific surface.
Using bioremediation and phytoremediation techniques. These methods has a way of taking care of polluted environment without creating additional problems.
Bioremediation is a means of mowing things around. If it is boaccumulation in plants what you need a plan about how to dispose of the contaminated plants