California Code, Health and Safety Code - HSC § 44504.1

“Brownfield site” means a real estate parcel or improvements located on the parcel, or both that parcel and the improvements, which is abandoned, idled, or underused, due to real or perceived environmental contamination, including, but not limited to, soil or groundwater contamination, the presence of underground storage tanks, or the presence of asbestos or lead paint on the parcel or in the improvements located on the parcel, which after assessment and planning, is determined to have a reasonable potential for economically beneficial reuse.