1. (1) It is the intent of the Legislature to protect the health of all people under actual circumstances of exposure. By July 1, 1998, the secretary of the department shall establish criteria by rule for the purpose of determining, on a site-specific basis, the rehabilitation program tasks that comprise a site rehabilitation program and the level at which a rehabilitation program task and a site rehabilitation program may be deemed completed. In establishing the rule, the department shall incorporate, to the maximum extent feasible, risk-based corrective action principles to achieve protection of human health and safety and the environment in a cost-effective manner as provided in this subsection. The rule shall also include protocols for the use of natural attenuation and the issuance of "no further action" letters. The criteria for determining what constitutes a rehabilitation program task or completion of a site rehabilitation program task or site rehabilitation program must:

   1. (a) Consider the current exposure and potential risk of exposure to humans and the environment, including multiple pathways of exposure. The physical, chemical, and biological characteristics of each contaminant must be considered in order to determine the feasibility of risk-based corrective action assessment.
   2. (b) Establish the point of compliance at the source of the contamination. However, the department is authorized to temporarily move the point of compliance to the boundary of the property, or to the edge of the plume when the plume is within the property boundary, while cleanup, including cleanup through natural attenuation processes in conjunction with appropriate monitoring, is proceeding. The department also is authorized, pursuant to criteria provided for in this section, to temporarily extend the point of compliance beyond the property boundary with appropriate monitoring, if such extension is needed to facilitate natural attenuation or to address the current conditions of the plume, provided human health, public safety, and the environment are protected. When temporarily extending the point of compliance beyond the property boundary, it cannot be extended further than the lateral extent of the plume at the time of execution of the brownfield site rehabilitation agreement, if known, or the lateral extent of the plume as defined at the time of site assessment. Temporary extension of the point of compliance beyond the property boundary, as provided in this paragraph, must include actual notice by the person responsible for brownfield site rehabilitation to local governments and the owners of any property into which the point of compliance is allowed to extend and constructive notice to residents and business tenants of the property into which the point of compliance is allowed to extend. Persons receiving notice pursuant to this paragraph shall have the opportunity to comment within 30 days of receipt of the notice.
   3. (c) Ensure that the site-specific cleanup goal is that all contaminated brownfield sites and brownfield areas ultimately achieve the applicable cleanup target levels provided in this section. In the circumstances provided below, and after constructive notice and opportunity to comment within 30 days from receipt of the notice to local government, to owners of any property into which the point of compliance is allowed to extend, and to residents on any property into which the point of compliance is allowed to extend, the department may allow concentrations of contaminants to temporarily exceed the applicable cleanup target levels while cleanup, including cleanup through natural attenuation processes in conjunction with appropriate monitoring, is proceeding, if human health, public safety, and the environment are protected.
   4. (d) Allow brownfield site and brownfield area rehabilitation programs to include the use of institutional or engineering controls, where appropriate, to eliminate or control the potential exposure to contaminants of humans or the environment. The use of controls must be preapproved by the department and only after constructive notice and opportunity to comment within 30 days from receipt of notice is provided to local governments, to owners of any property into which the point of compliance is allowed to extend, and to residents on any property into which the point of compliance is allowed to extend. When institutional or engineering controls are implemented to control exposure, the removal of the controls must have prior department approval and must be accompanied by the resumption of active cleanup, or other approved controls, unless cleanup target levels under this section have been achieved.
   5. (e) Consider the additive effects of contaminants. The synergistic and antagonistic effects shall also be considered when the scientific data become available.
   6. (f) Take into consideration individual site characteristics, which shall include, but not be limited to, the current and projected use of the affected groundwater and surface water in the vicinity of the site, current and projected land uses of the area affected by the contamination, the exposed population, the degree and extent of contamination, the rate of contaminant migration, the apparent or potential rate of contaminant degradation through natural attenuation processes, the location of the plume, and the potential for further migration in relation to site property boundaries.

   7. (g) Apply state water quality standards as follows:

      1. Cleanup target levels for each contaminant found in groundwater shall be the applicable state water quality standards. Where such standards do not exist, the cleanup target levels for groundwater shall be based on the minimum criteria specified in department rule. The department shall consider the following, as appropriate, in establishing the applicable minimum criteria: calculations using a lifetime cancer risk level of 1.0E-6; a hazard index of 1 or less; the best achievable detection limit; the naturally occurring background concentration; or nuisance, organoleptic, and aesthetic considerations.

      2. Where surface waters are exposed to contaminated groundwater, the cleanup target levels for the contaminants shall be based on the surface water standards as established by department rule. The point of measuring compliance with the surface water standards shall be in the groundwater immediately adjacent to the surface water body.

      3. The department may set alternative cleanup target levels based upon an applicant's demonstration, using site-specific modeling and risk assessment studies, that human health, public safety, and the environment are protected to the same degree as provided in subparagraphs 1. and 2. Where a state water quality standard is applicable, a deviation may not result in the application of cleanup target levels more stringent than the standard. In determining whether it is appropriate to establish alternative cleanup target levels at a site, the department must consider the effectiveness of source removal that has been completed at the site and the practical likelihood of the use of low yield or poor quality groundwater, the use of groundwater near marine surface water bodies, the current and projected use of the affected groundwater in the vicinity of the site, or the use of groundwater in the immediate vicinity of the contaminated area, where it has been demonstrated that the groundwater contamination is not migrating away from such localized source, provided human health, public safety, and the environment are protected.

   8. (h) Provide for the department to issue a "no further action order" when alternative cleanup target levels established pursuant to subparagraph (g)3. have been achieved.
   9. (i) Provide for the department to issue a "no further action order" with conditions, where appropriate, when alternative cleanup target levels established pursuant to subparagraph (g)3. have been achieved, or when the person responsible for brownfield site rehabilitation can demonstrate that the cleanup target level is unachievable within available technologies. Prior to issuing such an order, the department shall consider the feasibility of an alternative site rehabilitation technology in the brownfield area.

   10. (j) Establish appropriate cleanup target levels for soils.

       1. In establishing soil cleanup target levels for human exposure to each contaminant found in soils from the land surface to 2 feet below land surface, the department shall consider the following, as appropriate: calculations using a lifetime cancer risk level of 1.0E-6; a hazard index of 1 or less; the best achievable detection limit; or the naturally occurring background concentration. Institutional controls or other methods shall be used to prevent human exposure to contaminated soils more than 2 feet below the land surface. Any removal of such institutional controls shall require such contaminated soils to be remediated.

       2. Leachability-based soil target levels shall be based on protection of the groundwater cleanup target levels or the alternate cleanup target levels for groundwater established pursuant to this paragraph, as appropriate. Source removal and other cost-effective alternatives that are technologically feasible shall be considered in achieving the leachability soil target levels established by the department. The leachability goals shall not be applicable if the department determines, based upon individual site characteristics, that contaminants will not leach into the groundwater at levels which pose a threat to human health, public safety, and the environment.

       3. The department may set alternative cleanup target levels based upon an applicant's demonstration, using site-specific modeling and risk assessment studies, that human health, public safety, and the environment are protected.

2. (2) The department shall require source removal, if warranted and cost-effective. Once source removal at a site is complete, the department shall reevaluate the site to determine the degree of active cleanup needed to continue. Further, the department shall determine if the reevaluated site qualifies for monitoring only or if no further action is required to rehabilitate the site. If additional site rehabilitation is necessary to reach "no further action" status, the department is encouraged to utilize natural attenuation and monitoring where site conditions warrant.

History.--s. 5, ch. 97-277.