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L <br /> LJune 6, 2006 <br /> NOA Project Number: E06019B <br /> Table 6. <br /> Summary of Percolation Tcsts. <br /> Test No., Percolation Percolation Rate Test Comment <br /> VDate Tested Test Depth(ft) (minutes/inch) Duration (see notes) <br /> Parcel 1 (shallow) <br /> 5-18-06 3.24 83.3 4 hr Failing percolation rate <br /> ` <br /> Parcel 1(deep) 24.70 6.57 4 he Satisfactory Percolation Rate <br /> 5-18-06 <br /> Parcel 2(shallow) 3.1 No movement 4 hr Failing percolation rate <br /> 5-18-06 <br /> L Parcel 2(deep) 23.10 No movement 4 hr Failing percolation rate <br /> 5-18-06 <br /> 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 /> L 6.7 Discussion of Percolation Test Results <br /> LThe soils within the sewage disposal area of parcel one have demonstrated a satisfactory percolation <br /> rate for a standard septic system. Parcel two appears suitable for an engineered septic system.We <br /> recommend a Civil Engineer prepare a septic system design for proposed parcel two unless /6 l <br /> L additional percolation testing,performed under EHD oversight, achieves a satisfactory rate. Our <br /> office has been contracted by the client to prepare engineered septic system drawings for Parcel two <br /> of the property for the scenario that a secondary dwelling unit is to be developed,or eventual repair <br /> is necessary for the existing septic system; they are included with this report. <br /> L6.8 Discussion of Septic System Sizing <br /> Septic system construction should follow the San Joaquin County On-Site Wastewater Disposal (/G O <br /> Standards where applicable for parcel one. Parcel two appears suitable for an engineered septic /) <br /> Lsystem. Our office has been contracted by the client to prepare engineered septic system drawings <br /> for Parcel two of the property for the scenario that a secondary dwelling unit is to be developed, or <br /> Leventual repair is necessary for the existing septic system;they are included with this report. <br /> 7.0 CONCLUSIONS <br /> In summary, the soils within the sewage disposal areas of Parcel one have demonstrated a <br /> satisfactory percolation rate for a standard septic system. Parcel two appears suitable for an <br /> engineered septic system.We recommend a Civil Engineer prepare a septic system design for <br /> proposed parcel two unless additional percolation testing,performed under EHD oversight, <br /> achieves a satisfactory rate. Our office has been contracted by the client to prepare engineered septic <br /> system drawings for Parcel two of the property for the scenario that a secondary dwelling unit is to <br /> 9 <br /> L .,04 <br /> t <br />