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<br />6 <br /> <br />It is our opinion that the underlying native alluvial soils are generally suitable for foundation, <br />pavements and utility support. However, the upper portions of the soil strata had a very loose <br />relative density and prior to placing additional fill or foundations we recommend compacting <br />any loose soils and any soils disturbed during excavation and grading activities. <br /> <br />Groundwater was encountered in the soil borings while drilling and sampling at depths of <br />about 12 ½ feet, or deeper, below the ground surface. We generally do not anticipate that <br />groundwater will be encountered during construction and do not anticipate that dewatering <br />will be required. <br /> <br />The following sections provide recommendations for foundation design and construction. <br /> <br />4.3 Site Grading Recommendations <br /> <br />Excavation We recommend that all building remnants including footings, foundation walls, <br />floor slabs and underground utilities be removed from within the proposed building, <br />roadway, utility and oversize areas and be properly disposed of off-site. We recommend that <br />all vegetation, topsoil and any other soft or otherwise unsuitable soils, if encountered, be <br />removed from below the proposed building, roadway, utility and oversize areas. Table 3 <br />summarizes the anticipated excavation depths at the soil boring locations. Excavation depths <br />may vary and could be deeper. It should be noted that the excavation depths presented in <br />Table 3 do not account for foundation construction. Excavations for foundation construction <br />could be deeper. <br /> <br />Table 3. Anticipated Excavation Depths <br />Boring <br />Number <br />Measured <br />Surface <br />Elevation <br />(feet) <br />Anticipated <br />Excavation <br />Depth (feet)* <br />Anticipated <br />Excavation <br />Elevation (feet)* <br />Approximate <br />Groundwater <br />Elevation (feet)* <br />SB-1/P-1 898.9 1 898 844 <br />SB-2/P-2 881.6 4 ½ 877 861 ½ <br />SB-3 893.1 2 891 NE <br />SB-4 890.4 4 ½ 886 NE <br />SB-5/P-5 893.4 1 892 ½ 868 ½ <br />SB-6 882.4 1 881 ½ 870 <br />SB-7 880.0 2 878 NE <br />SB-8 885.1 2 883 855 <br />SB-9 884.4 2 882 ½ NE <br />SB-10 877.2 2 875 NE <br />SB-11 890.9 4 ½ 886 ½ NE <br />SB-12 891.5 2 889 ½ NE <br />SB-13 896.1 2 894 NE <br />SB-14 896.5 2 894 ½ NE <br />SB-15 886.3 2 884 ½ NE <br />* = Excavation depths and elevations were rounded to nearest ½ foot.