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� v <br /> 0 <br /> 1 <br /> A S S O C I A T E S I N C <br /> Soil Vapor Extraction Test <br /> ' On June 10, 1994, SEACOR conducted a soil vapor extraction pilot test at the site A vacuum <br /> was applied to an extraction well (VW-1) and measurements of flowrate and vacuum were <br /> 1 collected from three temporary observation wells (VW-2, VW-3 and VW-4) The test <br /> concluded that vapor extraction would be a viable remediation alternative for impacted soil at <br /> 1 the site The data collected during the pilot test indicated that sufficient flow and hydrocarbon <br /> recovery rates could be achieved at the site <br /> 1 Aquifer Pump Test <br /> In May 1994, SEACOR conducted an aquifer pump test at the site Groundwater was extracted <br /> ' from well MW 1 using an electric submersible pump Groundwater depths were monitored in <br /> well MW1 and three surrounding monitoring wells Well MW1 was able to maintain a <br /> constant extraction rate of approximately 0 25 gallons per minute The data collected during <br /> the aquifer pump test indicated the shallow groundwater-bearing zone had a low hydraulic � <br /> conductivity <br /> Additional Soil Vapor Extraction Test <br /> In January 1995, Geological Audit Services (GAS) advanced a total of five soil borings at the <br /> ' site Borings P-1, P-2 and P-3 were drilled to depths of 27 feet Boring P-4 was drilled at an <br /> angle of approximately 30 degrees from vertical to a total vertical depth of 20 feet Boring <br /> AS-1 was drilled to a depth of 38 feet Boring P-1 was dual-completed as a 4-inch diameter <br /> vapor extraction well (VE-1) and a 2-inch diameter in-situ air spargmg (IAS) observation well <br /> (ASO-3) Boring P-2 was completed as ASO-1, an IAS 2-inch diameter observation well from <br /> 1 17 to 27 feet Boring P-3 was dual-completed as extraction well VE-3 and IS observation well <br /> ASO-2 Boring P-4 was completed as extraction well VE-2 using 4-inch diameter Boring <br /> AS-1 was completed as an IAS injection well from 28 to 38 feet <br /> 1 A 24-hour soil vapor extraction (SVE) and IAS pilot test was conducted for additional SVE <br /> planning Air spargmg was performed by injecting air beneath the groundwater table at a <br /> 1 depth of approximately 28 feet Groundwater samples were collected from the spargmg <br /> observation wells at the termination of the test to measure changes in hydrocarbon <br /> 4 concentrations <br /> J ' Vacuum gauges were attached to each of the vapor extraction observations wells, in addition to <br /> wells MW1, MW3, MW4 and VW-1 The induced vacuum was measured in VE-2, VE-3, <br /> 1 VW-1, ASO-1, ASO-2, MW3 and MW4 The greatest vacuum measured in the vapor <br /> extraction observation wells was 2 4 inches, at well VE-3, located approximately 15 feet <br /> northeast of VE-1 However, after three hours of the test, a vacuum of 0 02 inches was <br /> W 1271421reportsUosure doc 6 <br />