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December 16,2003 <br /> Job Number: LG03-304 <br /> Page 9 <br /> of hardness. The high degree of cementation of the soil causes the typical auger drilling(non- <br /> mud rotary) to be difficult, slow and expensive. The cementation of the soil also causes the <br /> observed the permeability to be relative low. The hardpan zone does provide an additional <br /> means of protection between the ground surface and ground water. <br />~ Auger refusal of the deep percolation test had occurred at the depths of 22.5 feet for P-1, 7.7 for <br /> P-2, and 7.2 for P-3. It is our opinion that the upper shallow soil zone between the ground <br />` surface to five feet in depth, will have the most percolation potential. The deeper soil zone <br /> below five feet appears to be highly cemented or clayey-- unfavorable conditions for effluent <br /> disposal through seepage pits. <br /> 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Boring Locations <br />•. Six percolation tests were performed on November 21, 2003, two on each of the proposed lots. <br /> One shallow and one deep boring were advanced at each sampling location, as indicated in Plate <br /> 1. <br /> 6.2 Boring Preparation and Specifications <br /> Parcel 1,was evaluated with both a shallow and a deep percolation test boring advanced to 3 feet <br /> and to 22.5 feet respectfully. Parcel 2,was evaluated with both a shallow and a deep percolation <br /> test boring advanced to 3 feet and to 7.7 feet respectfully. Parcel 3, was evaluated with both a <br /> shallow and a deep percolation test boring advanced to 3.1 feet and to 7.2 feet respectfully. All <br /> six borings were drilled using a Mobile B-53 auger rig on November 6 and November 19, 2003. <br /> r. <br /> No ground water was encountered during the drilling of the borings. <br /> A 2-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of <br /> water in the percolation test boring. Approximately 2 inches of"pea gravel'were placed in the <br /> bottom of the boring, then the PVC pipe was installed on top of the gravel. Several feet of"pea <br /> gravel'were backfilled in the annular space. <br /> 6.3 Presaturation of Borings <br /> Presaturation of the percolation test holes occurred on November 20, 2003. The depth of water <br /> used to presoak was 12 inches above the bottom of the borings. Borings P-1 deep and P-2 deep <br /> were found to be in a saturated condition during the presoak. The saturation had probably <br /> pFR3�� <br /> Z <br /> 1 <br /> �rSpC <br /> r <br />