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At location PB, silty clay was encountered to the full depth of the hole. The soil logs are presented on Plates 12 and 13. Discussion of Soil Lithology Based on the soil observed in the borings, there appears to be moderate potential for percolation in the shallow soil zones at the test locations. Sandy soils generally have a much greater potential for percolation than fine-grained or cemented soils. However, a percolation test is the only accepted method for determining the suitability of the soils for a septic disposal area. Percolation test results are discussed in the following section. Percolation Test Shallow percolation tests were conducted at both locations on the Site. The soil borings discussed above were used for the percolation test holes. 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 soil logged, the test holes were completed for the percolation testing. Approximately two inches of pea gravel were placed in the bottom of each open soil boring, followed by a 2.0-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 holes were found to be intact and dry. Percolation Test Procedure Live Oak conducted the percolation testing for the borings on May 27, 2021. Due to initial percolation rates observed, a four-hour test was selected for Parcel A, and a one- hour test was selected for Parcel B. Water level measurements were taken every 30 minutes during the four-hour period, and every 10 minutes during the one-hour period. The last 30 minutes of each test were observed by Michael Suszycki, Registered Environmental Health Specialist at the San Joaquin County Environmental Health Department. 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 LOGE 2121 Page 6