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i L February 6,2006 NOA Project Number: E05173A L Table 6. Summary of Percolation Tests. Percolation Percolation Test Test Depth Rate Test Comment Date Tested d (ft) (minutes/inch) Duration P-1 shallow,11-22-05 3.05 125 ✓ 4-hr Unsatisfactory ercolation rate (Parcel 1) P-2 shallow,11-22-05 3.00 L7,7.9 4-hr Satisfactory percolation rate / (Parcel 2) P-3 shallow,11-22-05 3.10 19.2 4-hr Satisfactory percolation rate (Parcel 3) / P-4 shallow, 11-18-05 3.33 no drop J 4-hr Unsatisfactory p colation rate (Parcel 4) P-5 shallow,11-18-05 3.17 no drop ✓ 4-hr Unsatis actory ercolation rate (Parcel 5) P-6 shallow,11-22-05 (Parcel 6) 3.09 250` —� 4-h, Unsatisfactory. excolation rate P-4 shallow Retest,1-20-06 3.29 50 4-hr Unsatisfactory pIrcolation rate (Parcel 4) P-5 shallow Retest,1-20-06L 3.23 no drop 4-hr Unsatisfactoo percolation rate (Parcel 5 Note: EHD requires a percolation rate for the"shallow' test is less than or equal '60 utes per inch (Satisfactory test). No deep percolation tests are allowed in this area by EHD. 6.7 Discussion of Percolation Test Results The soils within the sewage disposal areas of proposed Parcels 2 and 3 have demonstrated a ` satisfactory percolation rate in accordance with the requirements of the EHD. The remaining Parcels 1,4,5,and 6 did not demonstrate a satisfactory percolation rate according to the requirements of the EHD. The soils of Parcels 2 and 3 appear to be suitable for a standard septic system. The soils of ` Parcels 1, 4, 5, and 6 will require additional percolation testing or engineered septic systems to mitigate the unsatisfactory percolation rates observed. k.. 6.8 Discussion of Septic System Sizing Septic system construction should follow the San Joa uin County On-Site Wastewater Disposal Standards ` where applicable. Where the percolation tests failed, other percolation t t could be performed or eere seep -cyst uld be designed to mitigate e un dory percolation tests.