“Contamination” means the presence of any regulated contaminant, as defined herein, other than naturally occurring substances at naturally occurring or natural background levels, in soil, groundwater, soil gas, air, sediment, surface water, construction or excavation debris, or any other material.

Source. (See Revision Note at chapter heading for Env-Or 600) #8812, eff 2-1-07; ss by #10831, eff 6-1-15; ss by #14159, eff 12-25-24