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low <br /> May 2,2007 <br /> 60 NOA Project Number: E07040B <br /> r.• 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 /> r. The completed percolation test form is 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 /> rMw 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 as being between 3.5 and 25 feet in depth;a satisfactory percolation <br /> rate for a deep test is 30 min/in or less. One percolation test must demonstrate a satisfactory <br /> ba percolation rate within the proposed septic system disposal field of each parcel to be suitable for a <br /> standard septic system. Details of the percolation tests are summarized in Table 3. <br /> Table 3. <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 /> Shallow 3.24 8.62 4 hr. Satisfactory Percolation Rate <br /> 3-22-07 <br /> Note: A satisfactory percolation rate for a"shalloud'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 /> 6.7 Discussion of Percolation Test Results <br /> The soils within the proporsed sewage disposal area have demonstrated a satisfactory percolation <br /> rate in accordance with the requirements of the EHD for the use of a standard septic system. <br /> 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. <br /> .. <br /> 7 <br />