Sec. 21302.

As used in this part:

(a) "Air" means ambient or indoor air at the point of exposure.

(b) "All appropriate inquiry" means an evaluation of environmental conditions at a property at the time of purchase, occupancy, or foreclosure that reasonably defines the existing conditions and circumstances at the property in conformance with 40 CFR 312.

(c) "Baseline environmental assessment" means a written document that describes the results of an all appropriate inquiry and the sampling and analysis that confirm that the property is a site. However, for purposes of a baseline environmental assessment, the all appropriate inquiry under 40 CFR 312.20(a) may be conducted within 45 days after the date of acquisition of a property and the components of an all appropriate inquiry under 40 CFR 312.20(b) and 40 CFR 312.20(c)(3) may be conducted or updated within 45 days after the date of acquisition of a property.

(d) "Biota" means the plant and animal life in an area affected by a corrective action plan.

(e) "Capillary fringe" means the portion of the aquifer above an unconfined saturated zone in which groundwater is drawn upward by capillary force and can include the presence of LNAPL.

(f) "Consultant" means a person that meets the requirements set forth in section 21325.

(g) "Contamination" or "contaminated" means the presence of a regulated substance in soil, surface water, or groundwater or air that has been released from an underground storage tank system at a concentration exceeding the level set forth in the RCBA tier I screening levels established under section 20120a(1)(a) and (b).

(h) "Corrective action" means the investigation, assessment, cleanup, removal, containment, isolation, treatment, or monitoring of regulated substances released into the environment from an underground storage tank system that is necessary under this part to prevent, minimize, or mitigate injury to the public health, safety, or welfare, the environment, or natural resources.

(i) "DNAPL" means a dense nonaqueous-phase liquid with a specific gravity greater than 1 and composed of 1 or more organic compounds that are immiscible or sparingly soluble in water. DNAPL encompasses all potential occurrences of DNAPL.

(j) "Grab sample" means a single sample or measurement taken at a specific time or over as short a period as feasible.

(k) "Groundwater" means water below the land surface in the zone of saturation and capillary fringe.

(l) "Groundwater not in an aquifer" means the saturated formation below the land surface that yields groundwater at an insignificant rate considering the local and regional hydrogeology and is not likely in hydraulic communication with groundwater in an aquifer. This includes water trapped or isolated in fill material in an underground storage tank or equivalent basin.

(m) "Heating oil" means petroleum that is no. 1, no. 2, no. 4-light, no. 4-heavy, no. 5-light, no. 5-heavy, and no. 6 technical grades of fuel oil; other residual fuel oils including navy special fuel oil and bunker c; and other fuels when used as substitutes for 1 of these fuel oils. Heating oil is typically used in the operation of heating equipment, boilers, or furnaces.

(n) "LNAPL" means a light nonaqueous-phase liquid having a specific gravity less than 1 and composed of 1 or more organic compounds that are immiscible or sparingly soluble in water, and the term encompasses all potential occurrences of LNAPL.

(o) "Local unit of government" means a city, village, township, county, fire department, or local health department as defined in section 1105 of the public health code, 1978 PA 368, MCL 333.1105.

(p) "Low flow sampling" means minimal drawdown groundwater sampling procedures as described in the United States environmental protection agency, office of research and development, office of solid waste and emergency response, EPA/540/S-95/504, December, 1995, EPA groundwater issue.

(q) "Migrating NAPL" means NAPL that is observed to spread or expand laterally or vertically or otherwise result in an increased volume of the NAPL extent, usually indicated by time series data or observation. Migrating NAPL does not include NAPL that appears in a well within the historical extent of the NAPL due to a fluctuating water table.

(r) "Mobile NAPL" means NAPL that exceeds residual saturation, and includes migrating NAPL, but not all mobile NAPL is migrating NAPL.

History: 1994, Act 451, Eff. Mar. 30, 1995 ;-- Am. 1995, Act 22, Imd. Eff. Apr. 13, 1995 ;-- Am. 2012, Act 111, Imd. Eff. May 1, 2012 ;-- Am. 2012, Act 446, Imd. Eff. Dec. 27, 2012 Popular Name: Act 451Popular Name: NREPA