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N-Values, shown as blows per foot (bpf) on the boring logs in the Fill and Possible Fill soils ranged <br />from 4 to 23 bpf, indicating the Fill had a very loose to medium dense relative density. <br />Buried Topsoil/Swamp Deposit Soil borings SB-1 and SB-2 encountered buried topsoil/swamp <br />deposit at depths of about 9 1/2 feet below the ground surface at boring SB-1 and at about 7 feet <br />below the ground surface at boring SB-2. The buried topsoil/swamp deposit found in SBA <br />extended to the termination depths of the borings. <br />The buried topsoil/swamp deposits were composed of clayey sand and sandy lean clay that were <br />black and dark grey in color and contained trace amounts of fibers. N-Values within the buried <br />topsoil/swamp deposit ranged from 5 to 6 bpf, indicating a rather soft to medium consistency. <br />Native Alluvium Below the pavement section, Fill, Possible Fill or buried topsoil the soil borings <br />encountered a variety of clayey and sandy native alluvial deposits that extended to the <br />termination depths of the borings. The native alluvial deposits were composed of lean to fat clay, <br />silty clayey sand, silty sand, sandy lean clay, clayey sand, lean clay, silty clay, poorly graded sand, <br />and poorly graded sand with silt, corresponding to the ASTM Classifications CL-CH, SC-SM, SM, <br />CL, SC, CL, CL-ML, SP, and SP-SM, respectively. <br />N-Values within the sandy or sandier alluvial soil ranged from 0 (weight of hammer) to 16 bpf, <br />indicating the native sands had a very loose to medium dense relative density. N-Values within <br />the clayey alluvium ranged from 2 to 12 bpf indicating a soft to rather stiff consistency. <br />3.3 Groundwater <br />Groundwater was encountered in the soil borings while drilling and sampling or after removing <br />the auger from the boreholes at depths ranging from about 71/2to 10 feet below the ground surface. <br />Water levels are summarized in Table 2. <br />Table 2. Summary of Groundwater Levels <br />Boring <br />Number <br />Estimated <br />Ground Surface <br />Elevation (feet)* <br />Approximate <br />Depth to <br />Groundwater (feet)* <br />Approximate <br />Groundwater <br />Elevation (feet)* <br />Vanadium Street between Green Valley Road and 1801h Lane <br />SB-1 <br />881 <br />71/2 <br />8731h <br />SB-2 <br />880 <br />NE <br />- <br />SB-3 <br />885 <br />NE <br />- <br />SB-5 <br />888 <br />7 1/2 <br />8801/2 <br />SB-6 <br />897 <br />NE <br />- <br />178th Lane NW <br />from about 300 feet west <br />of Vanadium Street to Uranium Street <br />SB-4 <br />890 <br />NE <br />- <br />SB-13 <br />889 <br />10 <br />879 <br />1801h Lane NW between Vanadium Street and Uranium Street <br />SB-07 891 71/2 1 8831/2 <br />Uranium Street from about 150 feet north of 1801h Lane NW to 1781h Lane NW <br />SB-8 <br />886 <br />NE - <br />SB-9 <br />886 <br />NE - <br />5 <br />