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1 <br /> t <br /> TEST #4: MONITORING WELL MW-1 <br /> ' 1 = depth of well - depth to water = 63.64 ft - 59.76 ft = 3.88 ft <br /> d - Oft <br /> 1 <br /> = 35% (porosity of aquifer is less than filter pack, because well is completed in <br /> ' upper 5-foot silty zone of aquifer) <br /> m = 50 ft (assumed; no boring has penetrated more than 20 feet of aquifer) <br /> rw = 4" = .333ft <br /> r, _ (2 in)2 x (1-.20) + .20(4 in)z = 3.2 int + .20(16 int) = 11.2 int = .933 W <br /> ' A = 1.9 from Figure 23.1 of Dawson and Istok (1991) <br /> B = .28 from Figure 23.1 of Dawson and Istok (1991) <br /> ' ti, = 113 minutes from equation <br /> In(R/r.) = 1.1 + 2.13 + .35 x In 50 ft - 9.59 ft ; <br /> In(9.59 ft/.333 ft) (9.59 ft - 0 ft)/.333 ft = <br /> ' 1.1 + 2.3 + _.35(3.69 -1 <br /> 3.36 28.79 -- 1.327 + .125}_1 = 2.21 <br /> ' K = .466 fe x 2.21 = 1.03 ft2 = .00047 ft/min = .68 da <br /> 2(9.59 ft - 0 ft)113 min 2167 ft-min <br /> 1 <br /> 1 <br /> ASA PMVl-7l-'9V1.<T <br /> 1 <br />