Laserfiche WebLink
March 15, 2007 <br /> NOA Project Number: E07031A <br /> 6.6 Percolation Test Forms and Results <br /> The completed percolation test forms are 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 /> satisfactory percolation rate for a shallow test is less than or equal to 60 minutes per inch drop One <br /> percolation test must demonstrate a satisfactory percolation rate within the proposed septic system <br /> disposal field of each parcel to utilize a standard septic system. Details of the percolation test are <br /> summarized in the table below. <br /> Table 4. <br /> Summary of Percolation Tests. <br /> LTest No., Percolation Percolation Rate Test __Comment <br /> I1Date Tested Test Depth(ft) (minutes/inch) Duration (se) notes) <br /> Shallow Pere Test <br /> 2-20-2007 3.15 20.8p 11 <br /> 4-hr. Satisfactory percolation rate <br /> Note: A satisfactory percolation rate for a"shallow"test is less than or equal to 60 min es per <br /> 6.7 Discussion of Percolation Test Results <br /> The soils within the sewage disposal area of the site have demonstrated a satisfactory percolation <br /> rate in accordance with the requirements of the EHD. The soils of this parcel appear to be suitable <br /> for a standard septic system. <br /> 6.8 Discussion of Septic System Sizing <br /> Septic system construction should follow the San Joaquin Coun a e Wastewater Disposal <br /> Standard[where applicable. <br /> 7.0 CONCLUSIONS <br /> In summary, a satisfactory percolation rate of the soil was achieved in the proposed septic disposal <br /> areas of the subject property.The site appears suitable for a standard septic system. <br /> No ground water was encountered in any of the borings drilled on the property. The depth to <br /> ground water was found to be approximately 10 to 20 feet below the ground surface for the period j <br /> of Fall 1998 and Spring 1999. The on-site water wells were tested for nitrate and DBCP. DBCP <br /> was non-detectable in the well,and the nitrate concentration in ground water was found to be 7.9 <br /> mg/L-NO3 which is below the maximum contaminant drinldng water limit of 45 mg/L NO3. <br /> L. <br /> ` 8 '404 <br /> r <br />