California Code, Health and Safety Code - HSC § 25395.91

(1) A bona fide purchaser, innocent landowner, or contiguous property owner who meets the requirements specified in Section 25395.80.

(2) A prospective purchaser who is in contract to acquire a site through a purchase agreement, option agreement, or otherwise, and satisfies the requirements of Section 25395.69, except for any provision that requires current ownership of the site. However, a prospective purchaser who enters into an agreement pursuant to this article shall not receive the immunities provided in Section 25395.81 until the time that the prospective purchaser acquires the site.