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►� March 15,2007 NOA Project Number: E07031A r 6.0 PERCOLATION TEST INFORMATION r 6.1 Percolation Test Locations A site map indicating the location of the percolation test hole is included a Platof this report. 6.2 Number of Percolation Tests Lne hallow percolation test was conducted on the site. 63 Boring Preparation and Presaturation The soil boring was advanced on the site with a four inch diameter hand auger on December 13, 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 v, bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. "Pea gravel' was backfilled in the annular space. Presaturation of the percolation test hole occurred on February 19,2007. 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 hole was found to be intact and dry on February 20, r 2007. 6.5 Percolation Test Procedure r A percolation test was conducted for the boring on February 20, 2007 in accordance with the requirements of the EHD.A percolation test with a duration of four hours w r o d for-qhe boring on site. The last half an hour of the percolation test was observed 1("a Medina,,genior Registered Environmental Health Inspector,EHD. Measurement of the water level during the percolation test was from a fixed reference point on the j PVC casing using an electric well sounder with an depth accuracy of 1/100th foot All tabulated values on the field data sheet (appendix) are in decimal feet. After water drop was observed,the r hole was checked for refill. The refill level was approximately 0.5 ft (6 inches) of water above the bottom level of the percolation test hole. The readings were taken approximately every 30 minutes for a period of the four hour percolation test. ` 7 '404