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October 5, 2005 <br /> NOA Project Number: E05105B <br /> Presaturation of the percolation test hole occurred on September 19, 2005. The depth of water used <br /> to pre-soak was 12 inches above the bottom of the boring. <br /> 6.4 Condition of Borings After Presaturation <br /> After the 24-hour soak period, the presaturated holes were found to be intact and dry on the day of <br /> testing. <br /> 6.5 Percolation Test Procedure <br /> Percolation tests were conducted for the borings on September 20, 2005 in accordance with the <br /> requirements of the EHD. A percolation test with a duration of four hours was performed for each <br /> hole. Final inspection for the last half hour of the percolation tests were not observed due to a <br /> scheduling error by the EHD. Results of the passing percolation tests were submitted on September <br /> 20,2005.According to personal communication with Rodney Estrada on September 20,2005,the <br /> results of the percolation tests were accepted and certified by the EHD. The percolation tests were all <br /> performed in compliance to EHD standards and all passed by a large margin to EHD standards. <br /> EHD certified the results and allowed for them to be used in this report. (Appendix). <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 /> bottom level of the percolation test hole. The readings were taken approximately every 30 minutes <br /> for a period of four hours. <br /> 6.6 Percolation Test Forms and Results <br /> The completed percolation test fortes 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. <br /> Details of the percolation tests are summarized in Table 6. <br /> 10 <br />