Laserfiche WebLink
✓ <br /> FLOYD DUE PROPERTY <br /> PAGE NO. 3 <br /> VI . SOIL PROFILE AND PERCOLATION TESTS <br /> Two test holes were excavated to a depth 10 feet in the <br /> areas of the proposed home sites in order to determine the soil <br /> profile in the general area. For approximate location of the <br /> test holes (PT) see the Tentative Parcel Map in the Appendix. <br /> The soil profile test holes were logged by an engineer and a <br /> description of the soils encountered in each hole is contained in <br /> the Appendix. The surface soils consisted of a silty fine to <br /> medium sand. Slightly cemented material was encountered at a <br /> depth of 2 . 5 and 4. 0 feet. This was underlain by a silty sandy <br /> that continued to the maximum depth explored. For a more <br /> detailed description of the soils encountered see the log of test <br /> pits. <br /> Shallow percolation tests were performed in the surface <br /> silty sand stratum at each of the test hole locations. The <br /> surface test failed at the PT-1 location because the cemented <br /> stratum or "hard pan" was closer to the surface. Consequently a <br /> deep pit test was performed in the silty sand stratum that <br /> underlaid the cemented material. For the shallow percolation <br /> tests a 8 inch diameter by 36 inch deep test hole was excavated. <br /> The deep pit test was performed in a 4 inch diameter by 8 .0 foot <br /> deep test hole. Two inches of gravel was placed in the bottom of <br /> each hole. A 3 inch diameter perforated pipe was placed in the <br /> shallow holes and 2 inch diameter pipe in the deep hole. The <br /> pipes were backfilled with gravel. Each of the tests holes was <br /> filled with water 24 hours prior to running the tests. The last <br /> half hour of the tests readings were witnessed by a county health <br /> official and the test data obtained is enclosed in the appendix. <br /> The percolation rates have been adjusted to account for the <br /> gravel and pipe backfill. Calculations for adjustments are on <br /> the test data 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-1a 8 36 293, failed <br /> PT-1b 4 96 11 <br /> PT-2 8 36 18 <br /> Even though the shallow percolation test passed at PT-2, due <br /> to the presence of the "hard pan", it is recommended that dry <br /> wells be used in conjunction with shallow leach lines at both <br /> locations. <br /> 06& - <br /> % <br />