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i <br /> ! <br /> GROUND ZERO ANALYSIS, INC. <br /> k { <br /> ' measuring air flow rate, air velocity, air pressure/temperature, <br /> and volatile organic compound concentrations, and polyvinyl <br /> chloride piping and fittings for wellhead connections <br /> ' Notification was given to the San Joaquin County Valley Unified Air � <br /> Pollution Control District (SJCVUAPCD) on October 10 , 1995 and � <br /> SJCVUAPCD granted Ground Zero permission to perform the test on <br /> ' October 11 , 1995 <br /> Vapor test wells VW-1 through VW-6 were used during the VET <br /> (locations of the wells are shcan on Figure 2) <br /> Bypass Test <br /> i <br /> On October 12 , 1995 the IC engine was initially operated for <br /> a total of approximately 40 minutes on test wells VW-1 and VW- <br /> 2 , and for a total of approximately 20 minutes on test wells <br /> ' VW-4 and VW-5 in order to test the integrity of the respective <br /> seals between the upper and lower screened portions of the <br /> test wells <br /> Vapor Test Well VW-1 <br /> f <br /> On October 12 , the IC engine was then operated for <br /> approximately 2 hours on test well VW-1 while the vacuum <br /> influences in test wells VW-2 , VW-3 , VW-4 , VW--5, and VW-6 were <br /> observed Vacuum influence was also observed in monitoring <br /> well MW-13 One influent vapor sample was collected from VW-1 <br /> after 30 minutes of operation A second influent sample and <br /> one effluent vapor sample were collected after 120 minutes of <br /> operation The effluent vapor sample was collected to <br /> document the destruction efficiency of the IC engine <br /> Vapor Test Well VW-2 <br /> On October 13 , the IC engine was operated for approximately 2 <br /> hours on test well VW-2 while the vacuum influences in test <br /> wells VW-1, VW-3 , VW-4, VW--5 , and VW-6 were observed Vacuum <br /> influence was also observed in monitoring well MW-13 One <br /> influent vapor sample was collected from VW-2 after 30 minutes <br /> of operation, and one influent and one effluent vapor sample <br /> ' were collected after 120 minutes of operation The effluent <br /> vapor sample was collected to estimate the destruction <br /> f efficiency of the IC engine <br /> ' Vapor Test Well VW-3 <br /> On October 13 , the IC engine was operated for approximately 30 <br /> minutes on test well VW-3 while the vacuum influences in test <br /> wells VW-1 , VW-2 , VW-4 , VW-5, and VW-6 were observed Vacuum <br /> ' 2 <br /> f <br />