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Brownfields Site Assessment June 2014 South Gifford Road Landfill, Vero Beach,Florida 1. INTRODUCTION 1.1 Terms of Reference Geosyntec Consultants (Geosyntec) conducted brownfields site assessment activities for the Treasure Coast Regional Planning Council (TCRPC) at the South Gifford Road Landfill (Site) located at 4701 41" Street in Vero Beach, Indian River County, Florida (Figure 1). TCRPC received a United States Environmental Protection Agency (USEPA) Brownfields Coalition Assessment Grant for evaluation of eligible properties within areas that may ultimately be designated for brownfields redevelopment. The overall former landfill property, a 115-acre former trench and fill landfill, is under evaluation to assess eligibility for brownfields redevelopment. The northern portion (approximately 55 acres) of the property is owned by Indian River County (IRC) and the southern portion (approximately 60 acres) is owned by the City of Vero Beach. The 30 acres adjacent to 41'` Street within the 55 acres owned by IRC were identified by TCRPC for potential brownfields redevelopment to provide enhancement to the surrounding Vero Beach community. TCRPC provided targeted funds to conduct the initial assessment activities described herein. 1.2 Purpose There are several potential redevelopment options (and/or combination of options) being considered for the Site (e.g., community market, recreational uses), but no specific plans are currently in place. Assessment activities were designed to assess potential human health/direct exposure-related concerns at the landfill in areas that: (i) are most likely to be redeveloped; (ii) will be the most accessible to the public; and/or (iii) are likely to be within the former landfill footprint (i.e., the northern 30 acres owned by IRC adjacent to 41st Street). The landfill and the area of assessment are identified on Figure 2. Specifically, the assessment activities focused on: (i) identification of contaminant concentrations in shallow soil; (ii) evaluation of the thickness of the existing soil cover over waste material; and (iii) evaluation of the composition of soil gas in subsurface soil, including the presence of methane, which is typically found in landfill gas (LFG). It should be noted that this Brownfields assessment work for TCRPC was completed pursuant to a separate contract from the ongoing groundwater monitoring and remediation work that Geosyntec is assisting IRC Solid Waste Disposal District (SWDD)with at the Site. The ongoing groundwater monitoring and remediation work differs from the Brownfields assessment described herein in several key aspects. The ongoing monitoring and remediation work is: (i) funded by IRC rather than the Brownfields grant through TCRPC; (ii) focused on groundwater rather than the shallow soil and LFG; and (iii) regulatory driven through the Florida Department of Environmental Protection (FDEP) rather than under a voluntary Brownfields program FR0766H 1 7/8/2014