SU0004824 SSNL - Laserfiche WebLink

Home Browse Search

1. v May 5, 2005 NOA Project Number: E05057A Table 8. Soil Boring Log for P-4. Depth Interval (ft) Soil Type Unified Soil Classification 0-1.0 Medium brown,moist,sandy clay C1. 1.0-3.5 Medium to light brown,very moist,clayey sand CL 5.4 Discussion of Soil Lithology A visual inspection of the shallow soils from on-site drilling indicates some potential for achieving a satisfactory percolation rate. A percolation test is the best method to determine the suitability of the soils for a septic disposal area. Please see the next section for percolation test results. Generally �. speaking, sandy soils have much greater potential for percolation than fine-grained soils. 6.0 PERCOLATION TEST INFORMATION 6.1 Percolation Test Locations L A site map indicating the locations of the percolation test hole is included as Plate 1 of this report. L 6.2 Number of Percolation Tests One shallow percolation test was conducted on each proposed parcel of the Site. 6.3 Boring Preparation and Presaturation �. The soil borings were advanced on the Site with a hand augur on April 12,2005 and April 25,2005. A 1.5-inch diameter PVC pipe with perforations on the bottom was used to measure the drop of water in the percolation test boring.Approximately 2 inches of"pea gravel' were placed in the bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. "Pea gravel' was used to backfill in the annular space. tam Presaturation of the percolation test hole occurred on April 25,2005.The depth of water used to pre-soak was 12 inches above the bottom of the boring. .. 6.4 Condition of Borings After Presaturation „w After the 24-hour soak period,two of the presaturated holes,Parcel 1 and 2,were found to be intact and dry on the day of testing. While the holes on Parcels 3 and 4 contained water in them. 9