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LJune 10, 2005 NOA Project Number: E05070A 6.3 Boring Preparation and Presaturation ` Three shallow soil borings were advanced on the Site by hand auguring on June 3, 2005. 14 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. Several feet L*-5) of"pea gravel'were backfilled in the annular space. Presaturation of the percolation test holes occurred on June 5, 2005. The depth of water used to ((, 3) pre-soak was 12 inches above the bottom of the boring. 6.4 Condition of Botings After Presaturation After the 24-hour soak period, the presaturated holes were found to be intact and dry on June 6, Y) 2005. (v 6.5 Percolation Test Procedure Percolation tests were conducted for the borings on June 6, 2005 in accordance with the requirements of the EHD. A percolation test with a duration of four hours was performed for each hole. The final half-hour of one four-hour percolation test was observed by Ms. Linda Turkatte, Senior Registered Environmental Health Inspector,EHD. Two of the tests were suspended before completion. / LMeasurement of the water level during the percolation test was from a fixed reference point on the (��) 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 holes were 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 four hours. 6.6 Percolation Test Forms and Results The completed percolation test forms are included in the appendix of this report A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth;a L satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. One percolation test must demonstrate a satisfactory percolation rate within the proposed septic system disposal field of each parcel. Details of the percolation tests are summarized in Table 5. A L 7 L