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s � <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 /> kh/u = q.Tp. ln(r2/r,) / 19 88TK(p22 - p,2) <br /> where. subscripts 1 and 2 refer to two observation wells <br />' An average transmissibility value is calculated from the values computed for pans of observation <br /> data that meet the above-mentioned criteria. Using the average transmissibility value, an <br />' estimated extraction interval (h), and air viscosity (u) of 0.018 cp, the permeability of the soil <br /> is calculated using the following equation: <br /> k = Transmissibility*u/h (5) <br /> CALCULATION OF RADIUS OF INFLUENCE <br /> Using the average transmissibility (kh/u), the radius of influence is calculated from the data for <br /> each observation well as follows <br /> r. = r exp(19 88T.((p�2 - Pc=j�/q,rTpj kh/u] (6) <br /> Notes• <br /> I Static atmospheric pressure is taken as 14 7 psia or 407 in. H2O. <br /> 2. Calculated transmissibiIity and radius of influence values that are significantly higher or <br /> lower than others are eliminated from averaging calculations. <br />' D-3 <br />