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Brian T. Fres Page 1 of 3 <br /> Pacific Environmental Group <br /> Project: 310-01.04 <br /> February 1, x'1993 <br /> f EFFECTIVE RADIUS OF INFLUENCE <br /> This program is designed to determine an effective radius of influence of <br /> a vapor extraction well. Data from feasibility tests or an operating <br /> system'may.be entered. A best fit curve is generated to fit raw field, <br /> data <br /> For more detail on this technic please read: <br /> Timothy°E. Buscheck, P.E. and Thomas R. Peargin, R.G. , November 1991, <br />' Proceedings of the Petroleum Hydrocarbons and Organic Chemicals in <br /> Groundwater: Prevention, Detection, and Restoration, Houston, Texas <br /> Summary of a Nation-Wide Vapor. Extraction System Performance Study <br /> n = 2 <br /> Number of monitoring points <br /> m :_ 1' : < . Number of data points per well <br /> i = 0 n Matrix array size for pressure data <br /> 1 Matrix array size for number of data points per well <br /> j k -well vacuum <br /> P (i,j): .pressure, inches of H2O <br /> Pn {i,j:';) = Normalized well vacuum pressure, inches of H2O <br /> 4 <br /> 7. <br />` R (i) = Radial distance from extraction well to monitoring point, feet <br /> FIELD DATA <br /> Well Pressure (inches of water) <br /> Extraction Probe 1 Probe 2 `Probe 3 <br /> P .4 P ._ .2.5 <br /> 0,j ;.x`. 1,j . 2,j <br /> Radial Distance <br /> R = <br /> �, 21.66 "y . . ;: •, ' <br />