Public participation shall be a required component of the process for participants for all sites enrolled in the land recycling program. The required level of public participation shall vary depending on the conditions existing at a site. At a minimum, the department shall notify all adjacent property owners, occupants of adjacent property, and the city or county in which the property is located of a site’s enrollment in the land recycling program and of the scope of work described in the participation agreement, and give the notified parties the opportunity to obtain updates regarding the status of activities relating to the enrolled site in the land recycling program. The notification shall not be required before the participant has had the opportunity to collect basic information characterizing the nature and extent of the contamination, but the notification shall be required in a timely manner allowing appropriate parties to have input in the formulation of the response action. If contaminants from the enrolled site have migrated off the enrolled site or are likely to migrate off the enrolled site, as determined by the department, the department shall notify by direct mailing all potentially affected parties, including the city or county in which the potentially affected property is located, and officials in charge of any potentially impacted public water supply and the notified parties shall be given opportunity to comment on proposed response actions. The department may require the participant of an enrolled site to publish public notice in a local newspaper if widespread interest in the site exists or is likely to exist as determined by the department. The department shall consider reasonable comments from potentially affected parties in determining whether to approve or disapprove a proposed response action or site closure.