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L <br /> February 16,2005 <br /> NOA Project Number: E040149A <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 /> Lfor a period of four hours or every 10 minutes for a period of one hour. <br /> 6.6 Percolation Test Forms and Results <br /> 4 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. One <br /> percolation test must demonstrate a satisfactory percolation rate within the proposed septic system <br /> disposal field of each parcel. Details of the percolation tests are summarized in Table 8. <br /> Yr <br /> Table 8. <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,2-11-05 3.12 15.63 4-hr Satisfactory percolation rate <br /> (Parcel 1) <br /> P-2 shallow,2-11-05 <br /> L (Parcel 2) 3.30 12.5 4-hr. Satisfactory percolation rate <br /> L P-3 shallow,2-10-05 3.04 2.60 1-hr. Satisfactory percolation rate <br /> (Parcel 3) <br /> P-4 shallow,2-10-05 3.19 2.45 1-hr. Satisfactory percolation rate <br /> (Parcel 4 <br /> Note: A satisfactory percolation rate for a"shallow'test is less than or equal to 60 minutes per inch. <br /> L6.7 Discussion of Percolation Test Results <br /> The soils within the sewage disposal areas of the proposed have demonstrated a satisfactory <br /> L percolation rate in accordance with the requirements of the EHD. The soils of these parcels appear <br /> to be suitable for a septic system utilizing leach lines or a filter bed. <br /> L6.8 Discussion of Septic System Sizing <br /> Septic system construction should follow the San Joaquin County On-Site Wastewater Disposal <br /> Standards where applicable. <br /> L <br /> L 9 <br />