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i July 28, 2006 NOA Project Number: E06068A /Measurement of the water level during the percolation test was from a fixed reference point on the V 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 holes were checked for refill. The refill level was approximately 0.5 ft (6 inches) of water above the ion bottom level of the percolation test hole. The readings were taken every 30 minutes for a period of J four hours. 6.6 Percolation Test Forms and Results 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 utilize a standard septic system. Details of the percolation tests are summarized in the table below. Summary of Percolation Tests. Test No., Percolation Percolation Rate Test Comment Date Tested Test Depth(ft) (minutes/inch) Duration (see notes) P-1 shallow 6-13-06 3.5 4.39 4-hr. Satisfactory percolation rate Note: A satisfactory percolation rate for a"shallow"testis less than or equal to 60 minutes per inch. A satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. V ✓6.7 Discussion of Percolation Test Results The soils within the sewage disposal areas of the Parcel have demonstrated a satisfactory percolation rate in accordance with the requirements of the EHD for the use of a standard septic system. 60 /6.8 Discussion of Septic System Sizing Septic System construction should follow the San Joaquin County On-Site Wastewater Disposal N' Standards where applicable. /7.0 CONCLUSIONS In summary, a satisfactory percolation rate of the soil was achieved in the proposed septic disposal area on the site. The proposed area appears suitable for standard septic system. No ground water was encountered in the boring drilled on the property. The depth to groundwater 9 bum 61 ✓