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n <br /> FI January 12,2007 <br /> NOA Project Number: E06157A <br /> FI. 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 every 30 minutes for a period of <br /> four hours. <br /> F, <br /> L <br /> /6.6 Percolation Test Forms and Results <br /> The completed percolation test forms ate 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 /> deep percolation test is defined by the EHD as being between 36 inches and 25 feet in depth;a <br />'ll satisfactory percolation rate for a deep test is less than or equal to 30 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 to utilize a standard septic system. Details of the percolation tests are <br /> summarized in Table 4. <br /> Table 4. <br /> Summary of Percolation Tests. <br /> Date Tested Percolation Percolation Rate Test Comment <br /> fTest Depth(ft) (minutes/inch) Duration (see notes) <br /> 12-12-06 3.15 No movement 4 hr Failing percolation rate <br /> l Shallow <br /> 12-12-06 <br /> Dee 22.80 1.7 4 hr Satisfactory Percolation Rate <br /> F] Note: A satisfactory percolation rate for a"shallow"test is less than or equal to 60 minutes per inch. <br /> A satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. <br /> i <br /> FI. <br /> /6.7 Discussion of Percolation Test Results <br /> E <br /> E The soils within the proposed septic disposal area of the site have demonstrated a satisfactory <br /> /percolation rate for a standard septic system. <br /> d 6.8 Discussion of Septic System Sizing <br /> Septic system construction should follow the San Joaquin County On-Site Wastewater Disposal <br /> Standards where applicable for the site. <br /> i <br /> FI <br />