QUESTION: Soil Testing for Heavy Metals

question / pregunta: 

I'd like to know if there are any simple, low-cost, easy to use methods for detecting lead in soil. The process of detecting heavy metals in the soils in New Orleans is necessitating the use of University resources and I would like to find a way to detect lead (or other heavy metals, or petroleum chemicals) that all residents can use who aren't able to utilize the same resources.

Is there any such method?

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