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6. .,. <br /> LMarch 17,2005 <br /> NOA Project Number: E040141B <br /> L6.6 Percolation Test Forms and Results <br /> The completed percolation test fortes are included in the appendix of this report. <br /> 6' 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. A <br /> One percolation test must demonstrate a satisfactory percolation rate within the proposed septic <br /> system disposal field of each parcel to be suitable for a standard septic system. Details of the <br /> percolation tests are summarized in Table 5. <br /> r. Table 5. <br /> Summary of Percolation Tests. <br /> Test No., Percolation Percolation Rate Test Comment <br /> Date Tested Test Depth(ft) (minutes/inch) Duration (see notes) <br /> i <br /> P-1 shallow,3/1/05 3.33 1-hr No movement,fail �J <br /> (Parcel 1) <br /> DR-1 shallow,3/1/05 3.38 --- 1-hr. No movement,fail <br /> (Designated Remainder <br /> Note: A satisfactory percolation rate for a"shallov/'test is less than or equal to 60 minutes per inch. <br /> 6.7 Discussion of Percolation Test Results <br /> L <br /> The soils within the sewage disposal areas of the proposed Parcels have not demonstrated a <br /> satisfactory percolation rate in accordance with the requirements of the EHD. These soils are found <br /> L to be suitable for use with an engineered septic system. (/+l2AquJ� S✓ <br /> 6.8 Discussion of Septic System Sizing <br /> L <br /> Septic system construction should follow the San Joaquin County On-Site Wastewater Disposal ( � J <br /> Standards where applicable. Parcel 1 and the Designated Remainder will require an engineered septic <br /> 6' system design to mitigate the unsatisfactory percolation rate of the soils observed. (McU-06� -5vs) <br /> 1w' 7.0 CONCLUSIONS <br /> In summary,unsatisfactory conditions were observed at percolation test location with both parcels. <br /> 6' The Parcels appear suitable for development with the use of an engineered septic system to mitigate <br /> the shallow ground water encountered. <br /> As part of a separate scope of a work, a Civil Engineer will prepare a septic system designs for <br /> Parcel 1 and Designated Remainder. <br /> L <br /> 9 <br /> g�. '044 <br /> L <br />