Laserfiche WebLink
June 4, 2004 <br /> NOA Project Number: E04065A <br /> Table 4. <br /> Soil Boring Log for P-1 and P-2 (Shallow and Deep). <br /> Depth Interval(ft) Soil Type Unified Soil Classification <br /> 0.3.5 Brown,lean clayey silt,moist ML <br /> 3.5-7 Light brown,lean clayey silt,moist,cemented ML <br /> 7-13 Reddish brown,lean clayey silt,moist,cemented ML <br /> 13-25 Sand clay,cemented CL <br /> r <br /> Note:Descriptions are representative of soil conditions encountered in both borings at P-1 and P-2. <br /> Clay soils typically exhibit poor percolation properties and are often problematic for shallow <br /> 1. trench septic systems. However, based on the percolation rates observed-described later in <br /> the report - , the deep soil zone has demonstrated a satisfactory percolation rate according to <br /> the EHD. <br /> L <br /> 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Boring Locations <br /> Four percolation tests were performed on June 2, 2004. One shallow and one deep <br /> percolation test were performed on each of the proposed parcels. The locations of these tests <br /> are indicated in Plate 1. <br /> 6.2 Boring Preparation and Specifications <br /> On Parcel 1, the shallow boring was advanced to 3.26 feet. The deep boring was advanced to <br /> 19.79 feet; drilling terminated in refusal. On Parcel 2,the shallow boring was advanced to 3.0 <br /> i feet. The deep boring was advanced to 25 feet, but backfill reduced the depth of the test hole <br /> to 24.65 feet. All four borings were drilled using a truck-mounted B-53 auger rig on June 1, <br /> 2004. <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. Several inches of"pea gravel" were placed in the bottom <br /> ` 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 /> 8 '404 <br />