All underground storage (UST) sites are excluded from participation in TCRPC's program except for petroleum-contaminated sites that are of "relatively low risk" compared with other petroleum contaminated sites in the State or that may be ineligible for State of Florida UST trust funding. Potential brownfield sites with contemplated or ongoing environmental enforcement actions taking place on them would also be eliminated as viable brownfield sites under TCRPC's grant program. Questionable sites would need to be evaluated by the Florida Department of Environmental Protection and/or the US Environmental Protection Agency.