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LMarch 28,2005 NOA Project Number: E05027A r Presaturation of the percolation test holes occurred on March 10, 2005. The depth of water used to pre-soak was 12 inches above the bottom of the boring. L ✓ 6.4 Condition of Borings After Presaturation After the 24-hour soak period, the presaturated holes were found to be intact on day of testing. V Water was observed in both holes on the day of testing. 6.5 Percolation Test Procedure Percolation tests for the property were conducted on March 11,2005,in accordance with the requirements of the EHD. A percolation test with a duration of four hours was performed for each Lhole. The final half-hour of each four-hour percolation test was observed by Ms. Lisa Medina, Registered Environmental Health Inspector,EHD. / L 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 Lholes 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. L /6.6 Percolation Test Forms and Results LQ 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 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 percolation rate within the proposed septic system disposal field of each parcel to use a standard septic system. Details of the percolation tests are summarized in Table 5. L L � s '404 L