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November 3, 2005 NOA Project Number: E05123A requirements of the EHD. A percolation test with a duration of four hours was performed for each hole. The last half an hour of the tests was observed by Mr. Michael Escotto, Registered Environmental Health Specialist, EHD. T 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 El 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 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 betweeW' 6 nd 42_iu hes in depth;a satisfactory percolation rate for a shallow test is less than or equal toQminutes per inch drop. A deep percolation test is defined by the EHD as being between 36 igcbes and 25 feet in depth; a satisfactory percolation rate for a deep test is less than or equal t40 utes per inch drop. One percolation test must demonstrate a satisfactory percolation rate within the proposed septic system disposal field of each parcel to utilize a standard septic system. Details of the percolation test is summarized in Table 6. Table 6. Summary of Percolation Tests. Test No., Percolation Percolation Rate Test Comment Date Tested Test Depth(ft) (minutes/inch) Duration (see notes) Shallow percolation test 9-29-05 3.2 125 4-hr Failing percolation rate Deep percolation test 9-29-05 23.79 83.33 4-hr Failing percolation rate Note: A satisfactory percolation rate for a"shallow"test is less than or equal to 60 minutes per inch. A satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. 6.7 Discussion of Percolation Test Results FI The soils within the sewage disposal areas of the site have not demonstrated a satisfactory percolation rate in accordance with the requirements of the EHD for the use of a standard septic system. The proposed parcel appears suitable for an engineered septic system. 1-? i 9 J _