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GROUND ZERO ANALYSIS, INC. <br /> ' influence was also observed in monitoring well MW-13 One <br /> f influent vapor sample was collected from VW-3 during the 30 j <br /> I minute test <br /> Valor Test Well VW-4 <br /> ' On October 13 , 1995 the IC engine was operated for <br /> approximately 2 hours on test well VW--4 while the vacuum <br /> influences in test wells VW-1, VW-2, VW-3, VW-5, and VW-6 were <br /> observed Vacuum influence was also observed in monitoring <br /> well MW-13 The applied vacuum and flow rate were stepped up <br /> after 30 minutes and again after 60 minutes in order to <br /> evaluate the relationship between vacuum and flowrate One <br /> influent vapor sample was collected after 30 minutes, and one <br /> influent and one effluent vapor sample were collected after <br /> 120 minutes of operation <br /> ._. <br /> k vapor Test Well, VW-5 <br /> No vapor extraction test was performed on test well VW-5 <br /> ` Vapor Test Well VW-6 <br /> On October 13 , the IC engine was operated for approximately 30 <br /> minutes on test well VW--6 while the vacuum influences in test <br /> wells VW-1, VW-2 , VW-3 , VW-4 , and VW-5 were observed Vacuum <br /> influence was also observed in monitoring well MW-13 One <br /> influent vapor sample was collected from test well VW-6 during <br /> the 30 minute test <br /> Air samples were collected in opaque Tedlar air sample bags with <br /> 1/4-inch Tygon--type tubing connected to a brass wellhead fitting <br /> Tygon-type tubing was used to minimize sample loss through <br /> adsorption and the possibility of distorted results from sample <br /> line contamination by a previous test run The samples were <br /> submitted to Sequoia Analytical for analysis <br /> VAPOR EXTRACTION TEST RESULTS <br /> Bypass Test <br /> ' During the bypass test, a vacuum of 37 inches of water and <br /> flow rates ranging from 44 to 46 2 cfm were applied to test <br /> well VW-1 and responses were observed In test well VW-2 , <br /> constructed in the same boring A vacuum influence of 1 inch <br /> of water was observed in test well VW-2 after 15 minutes A <br /> vacuum of 15 inches of water and a flow rate of approximately <br /> 37 4 cfm was applied to test well VW-2 and the response was <br /> observed in test well VW-1 A vacuum influence of 1 inch of <br /> 3 <br /> F <br /> F <br />