Laserfiche WebLink
September 30, 2007 <br /> NOA Project Number: E07141A <br />._e 6.0 PERCOLATION TEST INFORMATION <br /> 6.1 Percolation Test Locations <br /> A site map indicating the locations of theercolation test holes is incl ` <br /> p sided s Plate 1 f this report. <br /> 6.2 Number of Percolation Tests <br /> One"hallow" "percolation to_st_was-t-was-co ducted on each proposed parcel of the site, for a total of <br /> n n shallow e on D considers a shallow percolation. test boring to be betwe " 36 <br /> a in es eep. <br /> 6.3 Boring Preparation and Presaturation <br /> The soil borings were advanced with a hand augur on the site on August 30, 2007. r--- <br /> # 1 A 1.5-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 open soil boring, then the PVC pipe was installed on top of the gravel. "Pea gravel" <br /> _. was then used to backfill in the annular space. <br /> Presaturation of the percolation test holes occurred approximately 24 hours before the percolation <br /> tests. The depth of water used to pre-soak was 12inches above the bottom of the boring. c <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 day of <br /> testing. <br /> 6.5 Percolation Test Procedure <br /> Nine percolation tests for the site were conducted on August 31, 2007. All percolation tests were <br /> performed in accordance with the requirements of the EHD. A percolation test with a duration of <br /> four hours was performed for each hole. The final half-hour of each four-hour percolation test was <br /> observed by Mr. Ted Tasiopoulos, EHD. <br /> Measurement of the water level during the percolation test was from a fixed reference point on the <br /> PVC casing using an electric well sounder with an depth accuracy of 1/100th foot. All tabulated <br /> values on the field data sheet (appendix) are in decimal feet. After water drop was observed, the <br /> holes were checked for refill. The refill level was approximately 0.5 ft (6 inches) of water above the <br /> bottom level of the percolation test hole. The readings were taken approximately every 30 minutes <br /> for a period of four hours. <br /> 7 <br />