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State Road 60 and 43rd Avenue Ardaman File No. 13-5402 PROJECT APPROACH 2 The following scope of work describes the tasks necessary to preliminarily explore for the presence of contamination in soils and groundwater in the limited areas of the project study area, specifically at locations identified by FDOT. Groundwater Sampling Wells An additional 40 temporary groundwater sampling wells ("micro -wells") will be installed in accessible areas in close proximity to the locations recommended by FDOT. The micro -wells will be installed with a geoprobe using direct -push technology to an approximate depth of 15 feet and will be screened across the encountered groundwater table level. The proposed shallow micro -wells will be constructed of 1 -inch or 2 -inch diameter, 0.01 -inch slotted schedule 40 PVC pipe. A summary of the proposed number and general location of the wells is provided in the following table. Site Address (Proximity to Intersection) Proposed Number of Wells Mark's Mobil 4310 20th Street (Northwest Comer) 4 Former Texaco / Lenny's Lounge 4315 20th Street (Southwest Corner) 4 Former FINA #6644/Mobil 4395 20"' Street (200 Feet West) 6 Former Union 76 4233 20th Street (Southeast Comer) 6 Cumberland Farms 1925 43rd Avenue (500 Feet South) 6 Indian River Farms WCD 4400 20th Street (Northwest Comer) 2 Mermaid Car Wash 1935 43rd Avenue (450 Feet South) 2 Strip Shopping Center (Vero Beach Dry Cleaners) 4201 - 4211 20th Street (200 Feet East) 5 Proposed Retention Pond 44'" Avenue 5 Groundwater Sample Collection and Analysis Groundwater samples obtained from the wells will be collected for laboratory analysis in general accordance with FDEP sampling requirements. Groundwater samples collected from the wells will be submitted to a State certified laboratory for analysis by EPA Methods 8021 (VOC's) and 8270 (PAH), and for Total Recoverable Petroleum Hydrocarbons (TRPH) by the FL -PRO method. Soil Sampling and Analytical Testing As requested by FDOT, five soil samples for chemical analyses will be collected from adjacent to the locations of the temporary sampling wells to be installed in the proposed retention pond area. The samples will be "composite" samples obtained from the top 24 inches of soil at each location. According to the FDOT directive, the samples will be submitted for chemical analyses by EPA Methods 8021 (VOC's) and 8270 (PAH); for TRPH by the FL -PRO method; for RCRA 8 Metals; and for pesticides, herbicides and PCB's by EPA Methods 8081, 8082, 8141 A and 8151A. Report Preparation A report summarizing the above additional site assessment activities will be submitted upon completion of the above-described scope of work. Details, descriptions and rationales for the various site assessment activities will be presented, along with all data developed during the assessment activities The report will include the results of our findings relative to any identified soil and/or groundwater contamination within the study area that may present limitations or require special monitoring of contaminated media during construction of the proposed intersection widening project.