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I_ L November 21, 2006 NOA Project Number. E06044B Table 4. Summary of Percolation Tests Test No., Percolation Percolation Rate Test Comment ` Date Tested Test Depth(ft) (minutes/inch) Duration (see notes) Parcel 1,Shallow 3.28 No movement 4 hour Failing Percolation Rate Parcel 1,Deep 23.62 12.5 4 hour Satisfactory Percolation Rat Parcel 2,Shallow 3.30 No movement 4 hour Failing Percolation Rate Parcel 2,Deep 23.27 No movement 4 hour Failing Percolation Rate Parcel 3,Shallow 3.01 41.6 4 hour Satisfactory Percolation Rat Parcel 3,Deep 21.80 No movement 4 hour Faihn.2 Percolation Rate Note: A satisfactory percolation rate for a"shallow'test is 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. 6.7 Discussion of Percolation Test Results The soils within the sewage disposal areas of parcelG!ne three ve demonstrated a satisfactory percolation rate in accordance with the requiremenhe r the use of a standard septic system.The soils within the sewage disposal area of parcel two have demonstrated a satisfactory ` percolation rate for the use of an engineer nc system. We recommend a Civil Engineer prepare a septic system design for proposed parcel two Wess additional percolation testing, performed under EHD oversight, achieves a satisfactory e. Our office has been contracted by the client to prepare drawing for an engineered septic system on site. 6.8 Discussion of Septic System Sizing Septic System Construction should follow the San Joaquin County On-Site Wastewater Disposal Standards where applicable.The soils within the sewage disposal area of parcel two are suitable for the use of an engineered septic system. Our office has been contracted by the client to prepare `' drawing for an engineered septic system on site. 7.0 CONCLUSIONS The soils within the sewage disposal areas of parcels one and three have demonstrated a satisfactory percolation rate in accordance with the requirements of the EHD for the use of a standard septic system.The soils within the sewage disposal area of parcel two have demonstrated a satisfactory I' percolation rate for the use of an engineered septic system.We recommend a Civil Engineer prepare r• a septic system design for proposed parcel two unless additional percolation testing,performed trader EHD oversight, achieves a satisfactory rate. Our office has been contracted by the client to prepare drawing for an engineered septic system on site. 8 L "044 1r