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ground-water flow. An average porosity value of 0.30 was used, based on <br /> published porosity values for similar geologic materials. <br /> A maximum ground-water velocity of 124 feet per year (ft/yr) was calcu- <br /> lated as follows: <br /> V=9.0 x 10-3 cm/sec x 0.0041 <br /> 0.30 <br /> ' =0.000122 cm/sec <br /> or = 126.78 ft/yr <br /> thnTt93 Lofholm <br /> . 7 <br /> PJ9\939\9390111 c E - 2 Rev. 0 September 9, 1992 <br />