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a 1 • <br /> ' Y <br /> f • <br /> CALCULATION OF TRANSMISSIBILITY AND PERMEABILITY <br /> Rearranging equation (3) and applying it to a pair of observation well data, the transmissibility <br /> (kh/µ) can be calculated The equation is as follows: <br /> khl jc = q.Tp. ln(r2/ri) / 19 88TK(p22 - p!2) <br /> (4) <br /> where. subscripts I and 2 refer to two observation wells <br /> 1 <br /> ' An average transmissibility value is calculated from the values computed for pairs of observation <br /> data that meet the above-mentioned criteria. Using the average transmissibility value, an <br /> estimated extraction interval (h), and air viscosity (p) of 0.018 cp, the permeability of the soil <br /> is calculated using the following equation. <br /> k = Transmissibility (5) <br /> CALCULATION OF RADIUS OF LNFLUENCE <br /> 1 <br /> Using the average transmissibility (kh/µ), the radius of influence is calculated from the data for <br /> each observation well as follows <br /> r, = r exp[19 88T.,.((pr2 - pct?2}/q rTpj kh/µ1 <br /> (6) <br /> Notes, <br />' 1. Static atmospheric pressure is taken as 14 7 psis or 407 in. H.O. <br /> 2. Calculated transmissibility and radius of influence values that are significantly higher or <br />' lower than others are eliminated from avenging calculations. <br /> TP <br /> D-3 <br />