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, z <br /> s` <br /> ` On May 10, 1994, Apex conducted a short duration vapor extraction test to determine if <br /> vapor extraction is a remediation technology alternative for this site. Vapor flow during <br /> the test was estimated from the vacuum measurements obtained during the test. <br /> Vacuum data collected during the test, indicated a radius of influence of approximately 45 <br /> feet from monitoring well MW-1. Minor petroleum constituents were detected in soil <br /> samples collected from monitoring wells MW-2, MW-4 and MW-5 during the previous <br /> site investigations. Petroleum constituent concentrations were not detected in soil <br /> samples collected from monitoring wells MW-3 and MW-6. Based on these data, vapor <br /> extraction from MW-1 did affect the known extent of petroleum constituents in soil <br /> underlying the site. Groundwater samples collected from monitoring wells MW-2 through <br /> MW-6 do not contain petroleum constituent concentrations. It is assumed that the vapor <br /> flow obtained during the vapor extraction test was sufficient to capture the known extent <br /> of petroleum constituents in groundwater underlying the site. <br />