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Brian T. Frus Page 1 of 3 <br /> Pacific Environmental Groin <br /> Project: 310-01.04 <br /> February 1, 1993 <br /> 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. BllSCheck, . 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 Number of monitoring points <br /> m := 1 Number of data points per well <br /> i := 0 . .n Matrix array size for pressure data <br /> j 0 . .m - 1 Matrix array size for number of data points per well <br /> P (i,j) = Well vacuum pressure, inches of H2O <br /> Pn (i,j) = Normalized well vacuum pressure, inches of H2O <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 _' 83 P = .4 P .25 <br /> 0'j 1,j 2,j <br /> Radial Distance <br /> R <br /> i <br /> 21.1 <br />