Section 324.21307 - Report of release; initial response actions; duties of owner or operator liable under MCL 324.21323a(1) Upon confirmation of a release from an underground storage tank system, the owner or operator that is liable under section 21323a shall report the release to the department within 24 hours after discovery. The department may investigate the release. However, an investigation by the department does not relieve the owner or operator that is liable under section 21323a from any responsibilities related to the release provided for in this part.(2) After a release has been reported under subsection (1), the owner or operator that is liable under section 21323a shall immediately begin and expeditiously perform all of the following initial actions:(a) Identify and mitigate immediate fire, explosion hazards, and acute vapor hazards.(b) Take action to prevent further release of the regulated substance into the environment including removing the regulated substance from the underground storage tank system that is causing the release.(c) Using the process outlined by RBCA regarding NAPL, take steps necessary and feasible under this part to address unacceptable immediate risks.(d) Excavate and contain, treat, or dispose of soils above the water table that are visibly contaminated with a regulated substance if the contamination is likely to cause a fire hazard.(e) Take any other action necessary to abate an immediate threat to public health, safety, or welfare, or the environment.(3) Immediately following initiation of initial response actions under this section, the owner or operator that is liable under section 21323a shall do all of the following:(a) Visually inspect the areas of any aboveground releases or exposed areas of belowground releases and prevent further migration of the released substance into surrounding soils, groundwater, and surface water.(b) Continue to monitor and mitigate any additional immediate fire and safety hazards posed by vapors or NAPL that have migrated from the underground storage tank system excavation zone and entered into subsurface structures.Amended by 2012, Act 446,s 24, eff. 12/27/2012.Amended by 2012, Act 108,s 6, eff. 5/1/2012.1994, Act 451, Eff. 3/30/1995 ;--Am. 1995, Act 22, Imd. Eff. 4/13/1995.