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December 10, 1999 <br /> Job Number. 599308 <br /> Page 7 <br /> Table, Summary of Percolation Test Results <br /> Name, Location Depth of test Length Result Comments <br /> Date Tested <br /> P-1 Parcel No. 1 36 inches 4 hours 60 Result is the slowest interval recorded <br /> 11-23-99 min/in for the 4-hour test period. <br /> P-2 Parcel No. 2 36 inches 4 hours 60 Result is the slowest interval recorded <br /> 11-23-99 min/in for the 4-hour test period. <br /> P-3 Parccl No. 3 ,t, inches 4 hours 30 Result is the slowest interval recorded <br /> 11-23-99 1 1 1 min/in for the 4-hour test period. <br /> VII. CONCLUSIONS AND RECOMMENDATIONS <br /> In conclusion, a satisfactory percolation rate was achieved on each parcel. The percolation <br /> test on Parcel No. 1 indicated a rate of 60 min/inch, the percolation test on Parcel No. 2 indicated <br /> a rate of 60 min/inch, and the percolation test on Parcel No. 3 indicated a rate of 30 min/in. <br /> Shallow ground water was encountered in all three borings at a depth between 5 to 6.6 feet. <br /> Based on the results of this study,we believe the soils of the three parcels are suitable for <br /> a septic system and leach lines. We believe that due to the size of the parcels, the use of the septic <br /> system will not negatively impact the ground water quality of the area. San Joaquin County <br /> Sewage Standards mandate that it will be necessary to maintain a minimum 5-foot separation <br /> between shallow ground water and the bottom of any new septic leach line trench. <br /> Though the development of the parcels are not currently planned, should development <br /> occur and a conventional septic system is to be used, it will be necessary to place several feet of <br /> fill in the septic leach field area to maintain the 5 feet of separation. The following table is an <br /> estimate of the fill that may be needed to maintain a proper separation: <br /> Parcel No.. Depth to Height of Fill Likely <br /> Percolation Test Groundwater Feet Bottom of Leach Line Needed for Seutic Field <br /> Parcel No. 1,P-1 5.0 Set above present grade 2 to 3.5 feet <br /> Parcel No. 2,P-2 5.0 Set above present grade 2 to 3.5 feet <br /> Parcel No. 3,P-3 6.7 Less than 1.7 feet below 0.3 to 2.2 feet <br /> present grade <br /> ?pFRSO <br /> � 1 <br /> s <br /> z � <br /> c w <br /> �+'s c c• <br />