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February 8,2007 <br /> NOA Project Number: E06161A <br /> _. Test No., Percolation Depth to First Percolation Test Comment <br /> Date Tested Test Depth Groundwater Rate Duration (see notes) <br /> (ft) (ft) (minutes/inch) <br /> P-3 (shallow) 1.45 3.4 20.83 4-hr. Satisfactory Pere rate <br /> 12-18-06 <br /> ` P-4(shallow) 1.37 4.55 1.92 4-hr. Satisfactory perc rate <br /> 12-15-06 <br /> P4(shallow) 3.3 4.55 13.16 4-11r. Satisfactory perc rate <br /> 12-15-06 <br /> P-5(shallow) <br /> 12-15-06 1.35 2.3 27.78 4-hr. Satisfactory perc rate <br /> P-5(shallow) 3.25 2.3 No movement 4-hr. Failing Pere Rate <br /> 12-15-06 <br /> �— P-6(shallow) 1.55 3.8 2.0 4-hr. Satisfactory perc rate <br /> 12-15-06 <br /> P-6(shallow) <br /> 12-15-06 3.20 3.8 250 4-hr. Failing Perc Rate <br /> Note: A satisfactory percolation rate for a"shallow"test is less than or equal to 60 minutes per inch. <br /> LA satisfactory percolation rate for a"deep"test is less than or equal to 30 minutes per inch. <br /> L6.7 Discussion of Percolation Test Results <br /> The soils within the sewage disposal area of the site have demonstrated a satisfactory percolation <br /> Lrate in accordance with the requirements of the EHD for the use of a mounded septic system. <br /> 6.8 Discussion of Septic System Sizing <br /> L <br /> Septic system construction should follow the San Joaquin County On-Site WastewaterDirposal <br /> Standards where applicable. Due to the shallow depth to groundwater,we would recommend the use <br /> L of mounded systems to maintain a minimum of five feet from first groundwater. <br /> 7.0 CONCLUSIONS <br /> In summary, satisfactory percolation rates of the soil were achieved in the proposed septic disposal <br /> �. areas of each parcel. The soils of the proposed lot appear suitable for a mounded septic system <br /> following San Joaquin County On-Site Wastewater Disposal Standards where applicable. <br /> L <br /> 9 <br /> '0004 <br /> L <br />