Laserfiche WebLink
<br />LOGE 2211 Page 5 <br /> <br />The location of the boring is indicated on Plate 10. <br />The soil in the boring was similar to that described by the Soil Survey. Clay was <br />encountered to the full depth of the hole. The soil log is presented on Plate 11. <br />Discussion of Soil Lithology <br />Based on the soil observed in the boring, there appears to be limited potential for <br />percolation in the shallow soil zone at the test location. Sandy soils generally have a <br />much greater potential for percolation than fine-grained or cemented soils. However, a <br />percolation test is the only accepted method for determining the suitability of the soils <br />for a septic disposal area. Percolation test results are discussed in the following <br />section. <br />Percolation Test <br />A shallow percolation test was conducted in the proposed septic disposal area of the <br />Site. The soil boring discussed above was used for the percolation test hole. <br />Percolation test procedures conformed to San Joaquin County Environmental Health <br />Department policy. <br />Preparation and Presaturation of Percolation Test Holes <br />After the boring was advanced by hand auger and the soil logged, the test hole was <br />completed for the percolation testing. Approximately two inches of pea gravel were <br />placed in the bottom of the open soil boring, followed by a 2.0-inch diameter PVC pipe <br />with perforations on the bottom. Pea gravel was then used to backfill a few inches of <br />the annular space. <br />Live Oak presaturated the percolation test hole approximately 24 hours prior to the <br />percolation testing. The hole was filled with water to a height of 12 inches above the <br />bottom of the boring for the presaturation. On the day of testing, the hole was found to <br />be intact and dry. <br />Percolation Test Procedure <br />Live Oak conducted the percolation test for the boring on April 7, 2022. Due to the soil <br />type observed, a standard four-hour test was selected. Water level measurements <br />were taken every 30 minutes during the four-hour period. The last 30 minutes of the <br />test were observed by Naseem Ahmed, Registered Environmental Health Specialist at <br />the San Joaquin County Environmental Health Department. <br />An electronic well sounder with a depth accuracy of 1/100th 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