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SVE Well Test Analysis <br /> The measurements collected during the tests will be compared to pre-vapor extraction <br /> measurements and used to evaluate the effectiveness of the system, the optimum rate at which air <br /> is to be extracted by the vapor extraction system, and radius of influence for optimizing <br /> additional SVE well placement, if needed. The radius of influence testing may also yield <br /> information regarding an anisotropic flow in the vadose zone and allow analysis of the percentage <br /> of flow originating in the extraction zone versus the adjacent, upper(or lower) zone. <br /> For the reduction of the test well radius of influence data,the log of the vacuum response versus the <br /> distance from the extraction well should produce a nearly straight line for each of the test vacuums. <br /> Where the straight line intersects an arbitrary vacuum influence reference (generally 0.1 inch of <br /> water vacuum), this distance is considered the radius of influence at the particular operating <br /> condition. <br /> Raw data collected during pilot testing (i.e., flow rates and vacuums) as well as laboratory <br /> analytical data will be tabulated and presented in the report. System curves will be developed for <br /> various step-test configurations by plotting flow rate measurements against test well <br /> vacuums. These curves will provide important information in determining the target vacuums for <br /> constant rate SVE testing. At a minimum, the following data analysis will be performed: <br /> • Tables and graphic representations of air flow versus extraction pressures for each test <br /> sequence to assist in designing SVE blower and piping; <br /> • Calculations of air permeabilities; <br /> • Plan view of the estimated area of influence for each of the constant rate extraction scenarios; <br /> • Vacuum pressure in the observation wells vs. distance from test well(s); <br /> • Extracted vapor analysis (total VOCs) vs. time; and <br /> • Tables and graphic representations of VOC mass removal rates to estimate cleanup times,as <br /> appropriate. <br /> M ain\D:AEnvironmentaI\LN CV\10152007.wpd 56 <br />