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August 3, 2004 NOA Project Number: E04081A 6.2 Boring Preparation and Specifications One shallow soil boring was advanced on the Site to a depth of 3.06 feet by hand auguring on July 20, 2004. 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 of "pea gravel" were backfilled in the annular space. 6.3 Presaturation of Borings Presaturation of the percolation test hole occurred on July 21, 200. The depth of water used to pre-soak was 12 inches above the bottom of the boring. After the 24-hour soak period, the presaturated hole was found to be intact and dry onjuly 22, 2004. i 6.4 Percolation Test Procedure and Results A percolation test was conducted for the boring on July 22, 2004 in accordance with the requirements of the EHD. A percolation test with duration of one hour was performed. The entire one-hour-ercolation test was observed by Ms. Linda Turkatte, Environmental Health v. Inspector, EHD. Measurement 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 10 minutes for a period of one hour. A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth. A 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. Details of the percolation test are summarized in Table 6. 10