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Dykxhoorn Page 6 of 9 <br /> Project Number: E07024B <br /> Date: October 31, 2007 <br /> Table 2. <br /> Soil Boring !29. <br /> Depth Interval (ft) Soil Type Unified Soil Classification <br /> 0-3.5 Medium brown, silty sand SM <br /> 5.4 Discussion of Soil Lithology <br /> A visual inspection of the soils from on-site drilling indicates good potential for percolation <br /> because of the sandy nature of the soils. A percolation test is the best method to determine j <br /> the suitability of the soils for a septic disposal area. Please see the next section for percolation <br /> test results. Generally speaking, coarser-grained soils have much greater potential for <br /> percolation than fine-grained or cemented 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 Plate I in the <br /> appendix of this report. <br /> 6.2 Number of Percolation Tests <br /> One (1) shallow percolation test was conducted on each parcel for a tot o (2) shams <br /> percolation tests on the site. <br /> 6.3 Boring Preparation and Presaturation <br /> — <br /> Two shallow soil borings were advanced on the property with a hand auger on October 9, 2007. <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 /> "Pea gravel" was then used to backfill in the annular space. <br /> — Presaturation of the percolation test holes occurred approximately 24 hours prior to testing. <br /> The depth of water used to pre-soak was 12 inches above the bottom of the boring. <br /> 6.4 Condition of Borings After Presaturation <br /> After the 24-hour soak period, the presaturated holes were found to be intact and dry on the <br /> day of testing. <br /> .,44 <br /> V 902 Industrial Way•Lodi,CA 95240•209.367.3701 •Fax 209.369.4228 01007 Nei(O.Anderson&Associates.Inc <br />