Laserfiche WebLink
September 10, 2004 <br /> NOA Project Number: E040104A <br /> _ Table 6. <br /> Soil Boring Log for P-1 through P-6 <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> r <br /> 0-6.5 Dark brown clay with fine sand CL <br /> 6.5-20 Light brown clay with fine sand CL <br /> 20-25 Sand with some clay SC <br /> Note:Conditions were comparable in all holes,P-1 through P-6,shallow and deep. <br /> 5.4 Discussion of Soil Lithology <br /> A visual inspection of the shallow and deep soils from on-site drilling indicates some potential <br /> for percolation. A percolation test is the best method to determine the suitability of the soils. <br /> Please see the next section for percolation test results. Generally speaking, sandy soils have <br /> much greater potential for percolation than fine-grained and clayey soils. <br /> 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Locations <br /> A site map indicating the locations of the percolation test holes is included as Plate 1 in the <br /> appendix of this report. <br /> 6.2 Number of Percolation Tests <br /> One shallow and one deep percolation test were conducted on each proposed parcel of the <br /> Site, for a total of six shallow and six deep percolation tests. <br /> 6.3 Boring Preparation and Presaturation <br /> Six shallow and six deep soil borings were advanced on the Site with a truck-mounted B53 <br /> augur rig on August 27, 2004. The final foot and a half of each shallow hole was hand-augured <br /> to avoid disturbing the soil structure. <br /> A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop <br /> of water in the percolation test boring. Approximately 2 inches of "pea gravel" were placed in <br /> the bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. <br /> Several feet of "pea gravel" were backfilled in the annular space. <br /> 9 <br />