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6. L November 21,2006 NOA Project Number: E06044B L bottom of the open soil boring, then the PVC pipe was installed on top of the gravel. "Pea gravel' / was then used to backfill in the annular space. LPresaturation of the percolation test holes occurred 24 hours before the percolation testes were performed.The depth of water used to pre-soak was 12 inches above the bottom of the boring. L 6.4 Condition of Borings After Presaturation After the 24-hour soak period,the four presaturated holes were found to b(Ilnta t al d)ryn the days of testing. Ir. 6.5 Percolation Test Procedure L Percolation tests were conducted on the site on October 26 ,2006 in accord th the- requirements of the EHD. A percolation test with a duration off6&hours were performed for each hole. The last half an hour of each test was observed by Ted Tasiopoulos;Registered Environmental Health Specialist, 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 Lholes 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 every 30 minutes for a period of four hours. } 6.6 Percolation Test Forms and Results The completed percolation test form is included in the appendix of this report. i 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. A deep percolation test is defined as being between 3.5 and 25 feet in depth;a satisfactory percolation rate for a deep test is 30 min/in or less. One percolation test must demonstrate a satisfactory percolation rate within the proposed septic system disposal field of each parcel to utilize a standard L septic system. Details of the percolation tests are summarized in Table 4. L L 7 L '044