Laserfiche WebLink
1.. <br /> June 14,2005 <br /> NOA Project Number: E05066A <br /> ✓6.0 PERCOLATION TEST INFORMATION <br /> /6.1 Percolation Test Locations <br /> A site map indicating the locations of the percolation test holes is included as Plate 1 in the appendix <br /> of this report. <br /> ` Y 6.2 Number of Percolation Tests <br /> One shallow percolation test was conducted on the Site. <br /> ✓ 6.3 Boring Preparation and Presaturation <br /> ` A total of one shallow boring was advanced on the Site with a hand auger on May 25, 2005. <br /> 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 on June 8,2005. The depth of water used to <br /> pre-soak was 12 inches above the bottom of the boring. <br /> Y/6.4 Condition of Borings After Presaturation <br /> After the 24-hour soak period, the presaturated holes were found to be intact on June 9, 2005.The <br /> /shallow percolation test hole was found to be dry. <br /> 6.5 Percolation Test Procedure <br /> A percolation test was conducted for the shallow boring on June 9, 2005 in accordance with the <br /> requirements of the EHD. A percolation test with a duration of four hours was performed for the <br /> hole. The last half an hour of the test was observed by Ms. Lisa Medina, Senior Registered <br /> Environmental Health Specialist,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 every 30 minutes for a period of <br /> `- four hours. <br /> 8 <br /> #44 r. <br />