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JOHN THOMING TRUST PROPERTY <br /> SOIL SUITABILITY STUDY <br /> Page No. 3 <br /> of each hole. A 3 inch diameter perforated pipe was then placed in <br /> each hole and backfilled with gravel. Test holes were filled with <br /> water 24 hours prior to running the tests. The last half hour of <br /> the tests readings were witnessed by a county health official and <br /> the test data obtained is enclosed in the appendix. The <br /> percolation rates have been adjusted to account for the gravel and <br /> pipe backfill. Calculations for adjustments are on the test data <br /> sheets. <br /> A summary of the test results is presented next: <br /> Diameter of Depth of <br /> Test No. Hole (in. ) Hole (in. )— Percolation Rate (min/in) <br /> PT-1 8 36 11. 5 <br /> PT-2 8 36 14. 5 <br /> PT-3 8 36 11 . 3 <br /> PT-4 8 36 10 . 6 <br /> VII CONCLUSION <br /> Based on the results of the shallow percolation tests, the <br /> soil profile, and the performance of the septic system in the area, <br /> it is our opinion that the proposed homesites resulting from the <br /> proposed parcel splits should be suitable for use of on site sewage <br /> disposal systems. The proposed systems however, should be properly <br /> designed and installed according to current San Joaquin County <br /> 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 systems, 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 /> rpERSO <br /> P 1 <br /> D h <br /> Z W <br /> O / <br /> P <br /> 4SS p G� <br />