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FROM: PRRRGON PHONE N0. 9703771880 OCT. 11 2001 11:56RM P2 <br /> <br />PARAGON CONSULTING GROUP, INC. <br />SEEPAGE VELOCITY CALCULAT/ON <br />Project Name: Aggregate Industries - F Street Facility <br />Project Number: 1001018 <br />Aquifer Material: Fine to coarse sand with varying amounts of silt. Gay 8 gravel <br />Calculated ey: SAR <br />Oate: 11-0ct-01 <br />A hydraulic conducfivihr of 3,100 gallons per day per square foot was <br />published in Colorado Groundwater Circular No. 11 for a site near the <br />Aggregate Industries facility and was estimated based on a pump test. <br />That conductivity is equivalent to 0.146 centimeters per second. The <br />hydraulic gradient was estimated based on the September 19, 2D01 <br />piezometric surface in the vicinity of the spill area. <br />AQUIFER CHARACTERISTICS: <br />Parameter Low High <br />K (cm/sec) 1.46E-01 1.46E-01 <br />i 0.002 0.006 <br />Ne 0.22 0.33 <br />CALCULATED VALUES: <br />Parameter Low Hi h <br />K (ft/day) 413.86 413.86 <br />v (ft/day) 2.51 11.3 <br />v r 915.5 4,119.8 <br />EFFECTIVE POROSITIES OF AQUIFER MATERIALS <br />(Adapted from McVJhoRer 8 Sunada, 1885) <br />AQUIFER MATERIAL RANGE AVERAGE <br />Sedimerttarv Materials <br />Sandstone (fine) 0.02-0.40 0.21 <br />Sandstone (medium) 0.12-0.41 0.27 <br />Siltstone D.01-0.33 D.12 <br />Sand (fine) 0.01-0.46 0.33 <br />Sand (medium) 0.16-0.46 0.32 <br />Sand (coarse) 0.18-0.43 0.30 <br />Gravel (fine) 0.13-0.40 0.28 <br />Gravel (medium) 0.17-0.44 0.24 <br />Grevel (coarse) 0.13-0.25 0.21 <br />Sift 0.01-0.39 0.20 <br />Clay 0.01-0.18 0.06 <br />Limestone -0 -0.36 0.14 <br />Eolian Deoositonal Materials <br />Loess 0.14-0.22 0.18 <br />Eolian Sand 0.32-0.47 0.38 <br />Tuff 0.02-0.47 0.21 <br />