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OHM PROPERTY <br /> Page No. 3 <br /> by a tan fine sandy clayey silt. For a more detailed description <br /> of the soils encountered see the log of test holes. <br /> Shallow ( 36" deep) percolation tests were performed at the <br /> test hole locations. Two 4 inch diameter holes were excavated and <br /> 2 inches of gravel was placed in the bottom of each hole. 2 inch <br /> diameter perforated pipes were then placed and backfilled with <br /> gravel. The test holes were filled with water 24 hours prior to <br /> running the tests. The last half hour of the test readings were <br /> witnessed by a county health official and the test data obtained is <br /> enclosed in the appendix. The percolation rates have been adjusted <br /> to account for the gravel and pipe backfill. Calculations for <br /> adjustments are on the test data sheets. <br /> A summary of the tests results are presented next: <br /> Diameter of Depth of <br /> Test No. Hole (in. ) Hole (in. ) Per on Rate min in <br /> PT-1 4 36 t16 <br /> PT-2 4 36 <br /> VII CONCLUSION <br /> Based on the results of the percolation tests, the soil <br /> profile, and the performance of the septic systems in the area, it <br /> is our opinion that the homesite resulting from the proposed parcel <br /> split should be suitable for use of on site sewage disposal <br /> systems. Any proposed system should be properly designed and <br /> installed according to current San Joaquin County criteria. <br /> Based on the depth to ground water in the area, and the size <br /> of the proposed parcels, it is our opinion that the installation of <br /> the proposed septic system, if properly installed, should not <br /> adversely affect the quality of the ground water in the area. <br /> VIII LIMITATIONS <br /> The conclusions of this report are based on the information <br /> provided regarding the existing and proposed development, the use <br /> of the subject property, and the site conditions as they existed at <br /> the time we excavated our test holes and performed the percolation <br /> tests. It was assumed that the test holes and percolation tests <br /> P pERsO� <br /> D �^ <br /> Z W <br /> Q ~ <br /> 9SSOG♦ <br /> P <br />