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i L N%./ 60 May 5,2005 NOA Project Number: E05057A 6.5 Percolation Test Procedure Percolation tests were conducted on April 26, 2005 in accordance with the requirements of the EHD.A percolation test with a duration of four hours was performed for the hole. The final half-hour of the four-hour percolation tests were observed by Mr. Larry Godinho, Senior 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 hi" 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 approximately 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 between 36 and 42 inches in depth;a 60 satisfactory percolation rate for a shallow test is less than or equal to 60 minutes 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 tests are summarized in Table 9. Table 9. Summary of Percolation Tests. Test No., Percolation Percolation Rate Test Comment Date Tested Test Depth(ft) (minutes/inch) Duration P-1 shallow,4/26/05 3.45 16.7 4-hr Satisfactory percolation rate P-2 shallow,4/26/05 3.33 8.93 4-hr Satisfactory percolation rate P-3 shallow,4/26/05 3.49 --- 4-hr No wat d;op observed,fail P-4 shallow,4/26/05 3.47 125 4-hr Slow ercolatt n , ba Note: A satisfactory percolation rate for a"shallow"test is less than or equal to 60 minutes per inch. bw 1.. 10 .,444 V