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Brownfields Site Assessment <br />June 2014 <br />South Gifford Road Landfill, Vero Beach. Florida <br />thin layers of clay, sand and clay, and clayey sand, which comprise a semi -confining zone <br />overlying the Tamiami Formation. <br />2.5 Aquifer Properties and Groundwater Flow <br />Geosyntec performed aquifer testing in March 2001 to evaluate the hydraulic properties of the <br />shallow unconsolidated sands within the surficial aquifer system (20 to 55 ft BLS). Aquifer <br />testing activities were summarized in the June 2001 report titled: "Interim Pump and Treat <br />System Supporting Activities, Construction, and Start -Up Report". The aquifer testing activities <br />which included groundwater pumping from recovery well RW -1, yielded the following results: <br />(i) mean hydraulic conductivity (K) was estimated to be 142 ft/day; (ii) mean transmissivity was <br />estimated to be 6,400 ft squared (ft2)/day; and (iii) mean storativity was estimated to be 0.001. <br />Based on depth to water measurements collected sitewide as part of the semi-annual groundwater <br />monitoring activities ongoing at the Site since 2002, groundwater flow is generally toward the <br />southeast in the vicinity of the Site. <br />FR0766H 5 7/8/2014 <br />