Yes, soil sampling will be required as part of Phase 2 and prior to your property being ready to rebuild. Because soils in Sonoma County have naturally occurring levels of asbestos and other chemicals, it is important to identify what elements were previously existing on your soil before the fire, such that the property can be brought back to native conditions. Guidelines, requirements and procedures to perform this work are included within the Sonoma County Department of Health Services Environmental Health document “Management of Glass Wildfire Debris”.  Generally, this work consists of collecting baseline and confirmation samples under the responsible charge of a licensed geologist or engineer and having the soil analyzed at an analytical laboratory.