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_ Based on the vapor concentrations from each of the vapor extraction wells during the first <br /> " 60 hours of VES operation,the vapor extraction wells (VP-1, VP-2, VIS-3, and VP-4)were <br /> turned off fine and used as vapor inlet wells on January 8, 1989 to increase the flow of <br /> gasoline vapors to the vapor extraction wells. This isolated MW-3 on its own blower <br /> further increasing the rate of vapor extraction from this well. Since January 8, 1990 the <br /> VES has been operating on four (4) high capacity regenerative blowers on four <br /> i <br /> monitoring/recovery wells (MW-1, MW-3, MW-4, and RW-1) using VP-1,VP-2,VP-3, and <br /> VP-4 as vapor inlet wells. <br /> Kb <br /> Activated Carbon Utiliz LIgy <br /> The initial charge of 4,000 pounds of virgin 4 x 6 mesh activated carbon in reactors 1 and <br /> 4r„ <br /> x 2 were changed out and replaced with 4,000 pounds of virgin 4 x 6 mesh activated <br /> carbon on January 19, 1990. The partial saturation of the third reactor on January 19, <br /> sti 1990 did not warrant changeout since the third reactor is solely for the purpose of <br /> trapping fugitive emissions from the first two reactors. The rate of carbon utilization is <br /> t. <br /> approximately 200 pounds per day as of January 23, 1990. Thus, changeout of the <br /> _ carbon should be limited to once per month. <br /> `.. 7 <br /> VAPOR EXTRACTION TECHNOLOGY, INC. <br />