The advice includes what to do even before hiring someone to do testing or cleanup: Reduce your exposure to harmful substances in the soil by washing your hands, taking off your shoes before going into the house and wet mopping your floors.

<p>The advice includes what to do even before hiring someone to do testing or cleanup: Reduce your exposure to harmful substances in the soil by washing your hands, taking off your shoes before going into the house and wet mopping your floors.</p>