The following words and terms, when used in this chapter, shall have the following meanings, unless the context clearly indicates otherwise.(1) Innocent owner/operator certificate--A certificate issued by the executive director or their designee which confirms that the person is an innocent owner/operator as defined in Texas Health and Safety Code, §361.751, or that the person is eligible for immunity under §361.752(b).(2) Portion of the tract--A site which does not contain the source of the release of contamination but which is a subdivided section of a tract which contains the source of the release of contamination.(3) Site--The property as described in the legal description provided in the innocent owner/operator application.(4) Source of release of contamination--The property from which a release of contaminants originated.