The responsible party and in the case of an oil discharge, any other person who becomes aware of a discharge shall notify the department immediately, as soon as practical but within one hour, after obtaining knowledge that a discharge meeting one or more of the following criteria has occurred:

1. (a) A discharge of any regulated contaminants into surface water or groundwater of the state except for sheens resulting from an incidental discharge of oil from a properly functioning vessel engine;
2. (b) A discharge of 25 gallons or more of oil to land;
3. (c) A discharge of less than 25 gallons of oil to land, unless the discharge is cleaned up within 24 hours of discovery and properly disposed of;
4. (d) A discharge of regulated contaminants that results in the presence of vapors that pose an imminent threat to human health;
5. (e) A discharge of regulated contaminants resulting in a violation of the groundwater quality criteria of Env-Or 603.01 in a sample collected from a water supply well; or
6. (f) A discharge of regulated contaminants resulting in the detection of NAPL.

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