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Brownfields Site Assessment June 2014 South(mord Road Landfill, Vero Beach,Florida 5. CONCLUSIONS AND RECOMMENDATIONS The following conclusions are made based on the assessment activities completed at the Gifford Road Landfill during March and April 2014: • Concentrations of arsenic, BaP and/or total Bal? TEQ were observed in soil samples collected from soil sampling locations SB 100, SB 109, and SBII I from 0 to 2 ft BLS, with the highest concentrations observed from 0 to 0.5 ft BLS. • Soil cover over the landfilled waste was observed to be less than 2 ft thick at test pit locations TP-101, TP-102, TP-103, and at the soil boring locations between TP-106 and TP-107 and near TP-102. In all other locations, the cover soil thickness was greater than two ft. • Field screening results indicate the composition of soil gas in the assessment area of the Site is typical of closed/former landfill conditions. This initial assessment effort focused on the northern 30 acres of the Gifford Road Landfill owned by IRC, located adjacent to 41st Street. Overall, the data collected as part of this initial assessment effort described herein indicates that the conditions within the assessment area of the Site are typical of conditions expected at a closed/former landfill, such as the South Gifford Road Landfill. None of the site conditions identified as part of this initial assessment effort preclude redevelopment of the landfill; however, the data will be useful to identify areas where additional assessment and improvements need to be considered prior to and during the planning of redevelopment activities, as described further in the recommendations below. The following recommendations are made for the assessment area investigated during this study completed at the Site during March and April 2014: • Conduct additional assessment of surface soils where arsenic, BaP, and/or total BAP TEQ were observed above default regulatory guidance. • Once redevelopment plans have been furthered and grading plans developed, conduct additional assessment to further delineate areas with less than 2 ft of cover soils. The landfill cover must be constructed and maintained to prevent human contact with the underlying waste materials. As discussed earlier, the cover system required by FDEP usually consists of two ft of soils graded to prevent ponding; however, alternative cover system have been approved (e.g., one ft of soil cover underlain by a geotextile or geogrid FR0766H 12 7/8/2014