Crews scrape 3 – 6” of soil from the ash footprint and samples are sent to a state-approved lab for analysis. The results are compared against background samples taken from areas in the vicinity that are not directly impacted by fire to ensure that all contaminated ash was removed. If necessary, more soil is removed and the site is retested until it comes back clear of contaminants. All soil testing results are returned to the DMT for final review and validation.