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►. November 17, 2005 NCA Project Number: E05152-A L. Table 5. Summary of Percolation Tests. Test No.,Parcel Percolation Percolation Rate Test Comment Date Tested Test Depth (ft) (minutes/inch) Duration (see notes) P-1 shallow,Parcel 1, 6/22/05 3.40 5.1 41u Satisfactory percolation rate P-1 deep,Parcel 1, 6/22/05 24.32 19.2 4-hr Satisfactory percolation rate P-2 shallow,Parcel 2, 3.28 No movement 4-hr No movement,failed 6/22/05 P-2 deep,Parcel 2, 22.55 3.3 4-hr Satisfactory percolation rate 6/22/05 P-3 shallow,Parcel 3, 3.24 250 4-hr Unsatisfactory rate,failed 6/22/05 P-3 deep,Parcel 3, 24.91 2.2 4-hr Satisfactory percolation rate 6/22/05 P-4 shallow,Parcel 4, 3.40 250 4-hr Unsatisfactory rate,failed 6/22/05 P-4 deep,Parcel 4, 18.45 25 4-hr Satisfactory percolation rate 6/22/05 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 A satisfactory percolation test was achieved on each proposed parcel by way of the shallow percolation test or deep percolation achieving a satisfactory rate. r 6.8 Discussion of Septic System Sizing Septic System Construction should follow the San Joaquin County On-Site Wastewater Disposal G U ) Standards where applicable. 7.0 CONCLUSIONS In summary,satisfactory percolation tests were achieved on each proposed parcel. These areas have demonstrate they are suitable for use with a standard septic system according to EHD criteria. No ground water was encountered in any of the borings drilled on the property.The on-site water well was tested for nitrate and DBCP. The nitrate concentration in the well water was found to be 8.03 r 9 r