Florida

Florida

Document:

"Guidelines for the preparation of contamination assessment

reports for petroleum contaminated sites." (Department of

Environmental Regulation, State of Florida Bureau of Waste

Cleanup Technical Review Section 1989).

The Florida Department of Environmental Protection has prepared this

document. It is driven by human health considerations rather than ecological

considerations. The state does not have a formal ecological risk assessment

guidance document.

Georgia

Document:

"Guidance for selecting media remediation levels at RCRA solid

waste management units." Georgia Environmental Protection

Division, Atlanta (1996).

Summary: This document outlines the use of risk assessment to determine

remediation levels at RCRA facilities. The determination of risk-based

remediation levels fits into the RCRA Facility Investigation (RFI) step in the

RCRA Corrective Action Progress. The purpose of the RFI is to characterize the

nature and extent of releases, assess the risk posed by those releases, and identify

potential media remediation levels. This document presents general requirements

for using risk assessment to determine remediation levels that are protective of

human health and of ecological receptors.

To assess risk to human receptors, chemicals of potential concern (COPCs) for

each medium must be identified. If the risk or hazard of a particular COPC

exceeds certain "trigger levels," then the chemical is designated a chemical of

concern (COC). The "trigger levels" are:

a. Carcinogenic risk - if the cumulative cancer risk ("the summed risk to a

receptor of all COPCs for all pathways per land use scenario") is greater

than 1 10-6.

b. Noncarcinogenic risk - if the total hazard quotients (HQs) of all COPCs

for all pathways per land use scenario (HI) exceed 1.

Remediation levels for the protection of human health are backcalculated using

Region IV Supplemental Guidance to RAGS attached to this guidance document

for each COC (not COPC) in each affected medium. A justification of each

remediated value must accompany the value in the RFI report.

Ecological risk assessment under the Georgia guidance employs a screening

approach. The initial step is a preliminary risk evaluation (PRE). The PRE uses a

benchmark approach RCRA facilities in which the facility-related contaminant

concentrations are compared with USEPA Region 4 ecological screening values.

If the screening values are exceeded, four steps are followed:

1. Problem formulation.

2. Ecological effects evaluation.

A18

Appendix A Summary of Federal, State, and Regional Guidance