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v <br /> April 20,2005 <br /> ` NOA Project Number: E05022B <br /> L3 were all found dry on the day of testing. <br /> 6.5 Percolation Test Procedure <br /> i <br /> Percolation tests were conducted for the borings on April 15,2005 and April 19, 2005 in accordance <br /> with the requirements of the EHD. A percolation tests with a duration of four hours were <br /> performed for each hole. The last half an hour of each test was observed by Mr. David Van Dyne, <br /> L Senior Registered Environmental Health Specialist, EHD. <br /> LCMeasurement 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 /> LLholes were checked for refill. The refill level was approximately 0.5 ft (6 inches) of water above the <br /> bottom level of the percolation test hole. The readings were taken every 30 minutes for a period of <br /> four hours. <br /> L 6.6 Percolation Test Forms and Results <br /> LThe completed percolation test form is 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 /> 6' 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 /> Mpercolation 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 7. <br /> Table 7. <br /> Ir 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,3/14/05 3.24 --- 4-hr No water drop observed,fail <br /> (Parcel 1) <br /> P-1 deep,3/14/05 24.98 125 4-hr Slow percolation rate,fail <br /> (Parcel 1) <br /> P-1 deep,3/14/05 1152 1.39 4-hr Satisfactory percolation rate <br /> (Parcel 1) <br /> P-1 shallow,3/14/05 3.25 62.5 4-hr Slow percolation rate,fail <br /> ` (Parcel 2) <br /> P-1 deep,3/14/05 <br /> (Parcel 2) 6'78 7.81 4 br Satisfactory percolation rate <br /> 9 <br />