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Discussion of Soil Lithology <br /> Based on the soils observed in the boring, there appears to be moderate potential for <br /> percolation. Sandy soils generally have a much greater potential for percolation than <br /> fine-grained or cemented soils. However, a percolation test is the only accepted <br /> method for determining the suitability of the soils for a septic disposal area. Percolation <br /> test results are discussed in the following section. <br /> P <br />. ercolation Test <br /> One shallow and one deep percolation test were conducted on the Site; the soil borings <br /> excavated by NATS discussed above were used for the percolation test holes (Plate 2). <br /> Percolation test procedures conformed to San Joaquin County Environmental Health <br /> Department policy. <br /> Preparation and Presaturation of Percolation Test Holes <br /> The soil borings were completed by NATS for the percolation test holes. A percolation <br /> test permit was issued to NATS on May 25, 2010 for the percolation test. According the <br /> percolation test form, the boring size was six inches in diameter. We understand that <br /> standard percolation test hole, presaturation, and percolation test procedures were <br /> followed. <br /> Percolation Test Procedure <br /> NATS conducted the percolation test for the borings on June 2, 2010. Due to soil <br /> conditions, a four-hour test was required. Water level measurements were taken every <br /> half-hour during this four-hour period. Ted Tasiopoulos Senior Registered <br /> Environmental Health Specialist at the San Joaquin County Environmental Health <br /> Department, observed the last half-hour of the test. <br /> An electronic well sounder with a depth accuracy of 11100th foot was utilized for the <br /> water level measurements. The water level was measured against a fixed reference <br /> point on the well casing. Measurements were recorded on the data sheet in decimal <br /> feet. When necessary after measuring the water level, the moles were refilled with water <br /> to an approximate level of six inches above the bottom of the hole. <br /> Percolation Test Results <br /> The completed percolation test form is included in Appendix 3 of this report. The form <br /> was signed by Ted Tasiopoulos and indicates percolation rates for the holes based on' <br /> the final water drop observed. <br /> LOGE1016 Page 6 <br />