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Discussion of Soil Lithology Based on the soils observed in the borings, there appears potential for percolation of the surface soils, and oderateto be low to moderate percolation of the deep soils. Sandy soils generally have a muto ch 9e°d percolation than fine-grained or cemented soils. However, a percolation Potential for accepted method for determining the suitability of the soils for a stest is the only g greater potential for ��J Percolation test results are discussed in the following section. eptic disposal area. Percolation Test Two shallow and two deep percolation tests were conducted on the Site; the soil borings discussed above were used for the percolation test holes (Plate 9). Percolation test procedures conformed to San Joaquin County Environmental Health Department policy. Preparation and Presaturation of Percolation Test Holes After the borings were advanced by hand auger and the soils logged, the test holes were completed for the percolation testing. Approximately 2 inches of pea gravel were placed in the bottom of each open soil boring, followed by a 1.5-inch diameter PVC pipe with perforations on the bottom. Pea gravel was then used to backfill a few inches of the annular space. Live Oak presaturated the percolation test holes approximately 24 hours prior to the percolation testing. Each hole was filled with water to a height of 12 inches above the bottom of the boring for the presaturation. On the day of testing, the percolation test holes were found to be intact. Three of the holes were dry; standing water was present in the shallow hole in the southern test area. Percolation Test Procedure Live Oak conducted the percolation tests for the borings on October 3 and November 18, 2013. Due to soil conditions observed, four-hour tests were selected. Water level measurements were taken every half hour during this four-hour period. Michael Escotto, Senior Registered Environmental Health Specialist at the San Joaquin County Environmental Health Department, observed the last half hour of each test. An electronic well sounder with a depth accuracy of 1/100th foot was utilized for the water level measurements. The water level was measured against a fixed reference point on the well casing. Measurements were recorded on the data sheet in decimal feet. When necessary after measuring the water level, the hole was refilled with water to a level of six inches or more above the bottom of the hole. I nr.F 1125 Page 6