FL S0100

Defines "background concentration" and "long-term natural attenuation" (natural attenuation approved as a site rehabilitation task for more than 5 years) for petroleum-contaminated sites and brownfield sites under Florida law

Requires the Department of Environmental Protection to include protocols for long-term natural attenuation where site conditions warrant, and expands cleanup criteria to consider interactive effects of contaminants (additive, synergistic, and antagonistic) rather than only additive effects

Revises the low-scored site initiative by increasing the per-site funding cap to the CATEGORY TWO threshold, raising the annual encumbrance limit from $10 million to $15 million, expanding groundwater monitoring from 6 to 12 months, and allowing limited remediation activities as part of the assessment plan

Increases the advanced cleanup program contracting cap from $15 million to $25 million per fiscal year, allows property owners and responsible parties to enter voluntary cost-share agreements to bundle multiple sites, and expands application format options for both aggregate and individual site cleanups

Expands eligibility for the Abandoned Tank Restoration Program by removing the June 30, 1996 application deadline and the December 31, 1998 reporting cutoff, and provides up to $100,000 in supplemental funding for additional remediation and monitoring needed to achieve a "No Further Action" determination under the Petroleum Cleanup Participation Program