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September 25,2006 <br /> NOA Project Number: E06102B <br /> ✓6.4 Condition of Borings After Presaturation <br /> After the 24-hour soak period,the presaturated holes were found to be intact on the day of testing. <br /> /'6.5 Percolation Test Procedure <br /> �- Percolation tests were conducted for the borings on the site on September 6,2006 in accordance <br /> with the requirements of the EHD. A percolation test with a duration of four hours was performed <br /> for each hole. The last half an hour was observed by Ms. Lisa Medina,Registered Environmental <br /> r. Health Inspector,EHD. <br /> Measurement of the water level during the percolation test was from a fixed reference point on the <br /> PVC casing using an electric well sounder with an depth accuracy of 1/100th foot. All tabulated <br /> values on the field data sheet (appendix) are in decimal feet. After water drop was observed, the <br /> holes were checked for refill. The refill level was approximately 0.5 ft (6 inches) of water above the <br /> L bottom level of the percolation test hole. The readings were taken every 30 minutes for a period of <br /> four hours. <br /> �- <br /> V61.6 Percolation Test Forms and Results <br /> The completed percolation test forms are included in the appendix of this report. <br /> A shallow percolation test is defined by the EHD as being between 36 and 42 inches in depth; a <br /> satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop. A <br /> ►- deep percolation test is defined as being between 3.5 and 25 feet in depth; a satisfactory percolation <br /> rate for a deep test is 30 min/in or less. One percolation test must demonstrate a satisfactory <br /> percolation rate within the proposed septic system disposal field of each parcel to utilize a standard <br /> �• septic system. Details of the percolation tests are summarized in Table 5. <br /> Table 5. <br /> Summary of Percolation Tests. <br /> Test No., Percolation Percolation Rate Test Comment <br /> Date Tested Test Depth(ft) minutes/inch) Duration (see notes) <br /> P-1 shallow 28 _ 5. 4-hr Satisfactory percolation rate <br /> 9-6-06 <br /> P-2 shallow <br /> 8-3-05 3.17 7.81 4-hr Satisfactory percolation rate <br /> Note: A satisfactory percolation rate for a"shallow'test is less than or equal to 60 minutes per inch. <br /> A satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. <br /> L <br /> 7 <br />