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PCA- Intersection of SR 60 and 43rd Avenue - 2 - Ardaman Proposal No. 12-3836 I. Preliminary Contamination Assessment The initial assessment activities and laboratory analyses described below are designed to preliminarily explore subsurface conditions, and adhere to the criteria established in FAC 62-770. All samples collected during this assessment will be provided to a National Environmental Laboratory Accreditation Conference (NELAC) certified laboratory for analysis. The proposed environmental activities will produce various investigation-derived wastes (IDW) including but not limited to: decontamination fluids; soil cuttings;well development water; and well purge water. We have assumed that IDW can be handled as non-hazardous. For budgetary purposes, we have included an allowance for drumming IDW as necessary. A. Soil Sampling, Soil Screening and Analytical Testing Up to 70 auger borings will be conducted to a depth of 2 to 3 feet below the encountered groundwater table or to a maximum depth of 7 feet at accessible locations within the existing and/or proposed right-of-way expansion areas adjacent to the sites identified in the CSER as having "medium" and "high" potential for contamination. The auger borings will be conducted using a 3-inch diameter, hand-held bucket auger. Soil samples will. be obtained during performance of the borings at approximate- 2-foot intervals. These samples will be placed in 16-ounce glass sample jars, half-filled, in general accordance with FAC 62-770. A sample of soil gas will be withdrawn using the vacuum pump of an organic vapor analyzing (OVA) device (Century 128 OVA). Soil samples collected will also be observed for indications of stains, sheens and unusual odors. A summary of the proposed number and approximate location of the borings is provided in the following table. Site Address(Proximity to Intersection) Proposed Number and Location of Borings Mark's Mobil 4310 20'"Street(Northwest Comer) Four along 43rd Avenue and four along 20`"Street Former Texaco/Lenny's Lounge 4315 20'"Street(Southwest Comer) Four along 43rd Avenue and four along 20d'Street Former FINA#6644/Mobil 4395 20d'Street(200 Feet West) Four along 201"Street Former Union 76 4233 201"Street(Southeast Comer) Four along 43id Avenue and four along 20'h Street Cumberland Farms 1925 43rd Avenue(500 Feet South) Four along 43d Avenue Indian River Farms WCD 4400 20'"Street(Northwest Comer) Four along 43d Avenue and four along 201"Street Quick Snack and Coin Laundry 4236 20'"Street(Northeast Comer) Four along 43rd Avenue and four along 20'"Street Mermaid Car Wash 1935 43rd Avenue(450 Feet South) Three along 43rd Avenue Strip Shopping Center 4201 -4211 201"Street(200 Feet East) Five along 201"Street (Vero Beach Dry Cleaners) In addition, up to 12 soil samples will be collected from select boring locations for chemical analyses. The samples will be "grab" samples obtained from locations and depths that will be determined based on the results of the soils screening and/or proximity to sites most likely believed to have contamination. The samples will be submitted for chemical analyses by EPA Methods 8020 and 8270 and for TRPH by the FL-PRO method. Additionally, up to six of the samples will also be analyzed by EPA Method 8010. B. Groundwater Sampling Wells lftw Temporary groundwater sampling wells will be installed at locations determined based on findings during the assessment. For budgeting purposes, we have preliminarily assumed up to 26 shallow wells (to a maximum depth of 10 feet) will be needed to explore for the presence of groundwater contamination. The locations of the wells and actual depths will be determined 33