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September 21,2005 NOA Project Number: E05104A was then used to backfill in the annular space. L Presaturation of the percolation test holes occurred on August 9 and 15, 2005.The depth of water used to pre-soak was 12 inches above the bottom of the borings. l L 6.4 Condition of Borings After Presaturation LAfter the 24-hour soak period,the presaturated holes were found to be intact on the day of testing. All the deep and the shallow holes on the subject property were found to be dry on the day of /� Ltesting except for the shallow boring on lot four which contained approximately 1 inch of water c Tl remaining. . L6.5 Percolation Test Procedure Percolation tests were conducted for the borings on the site on August 10 and 16,2005 in L accordance with the requirements of the EHD. A percolation test with a duration of four hours was performed for each hole. The last half an hour was observed by Mr. Michael Escotto,Registered Environmental Health Inspector, EHD. 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. Alltabulated L values on the field data sheet (appendix) are in decimal feet. After water drop was observed, the Y 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 Lfour hours. 6.6 Percolation Test Forms and Results L The completed percolation test forms are included in the appendix of this report L 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 L percolation rate within the proposed septic system disposal field of each parcel to utilize a standard septic system. Details of the percolation tests are summarized in Table 4. I L L 9 'o44 L