SU0005193 - Laserfiche WebLink

Home Browse Search

February 2,2006 NOA Project Number: E05058B i 5.4 Discussion of Soil Lithology '�� A visual inspection of the shallow soils from on-site drilling indicates somipotentiat or satisfactory' percolation. A percolation test is the best method to determine the suitability of the soils. Please see the next section for percolation test results. Generally speaking, coarser grained soils have much greater permeability than fine-grained soils. 6.0 PERCOLATION TEST INFORMATION 6.1 Percolation Test Locations A site map indicating the locations of the percolation test holes is included a Plate of this report. 6.2 Number of Percolation Tests Q `shallow" percolation test was conducted on each proposed parcel of the Site, for a total of hallow percolation tests. EHD considers a shallow percolation test boring to be between 36 And 2 inches deep. 6.3 Boring Preparation and Presaturation The soil borings were advanced with a hand augur on the Site on January 6 and 9, 2006. / 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 then used to backfill in the annular space. Presaturation of the percolation test holes occurred approximately 24 hours before the percolation tests.The depth of water used to pre-soak was 12 inches above the bottom of the boring. 6.4 Condition of Borings After Presaturation After the 24-hour soak period, the presaturated holes were found to bintac an dry�bn the day of testing. �/ 6.5 Percolation Test Procedure Percolation tests for Parcels 1 and 2 occurred on January 12,2006. Parcels 3 and 4 were tested on January 17, 2006. Parcels 5 and 6 were tested on January 11,2006. Parcels 7 and 8 were tested on January 10,2006.All percolation tests were performed in accordance with the requirements of the / 7 .,04