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LIVE OAK GEO ENVIRONMENTAL, INC. <br />407 W. Oak St., Lodi, CA 95240 •:• (209) 369-0375 •:• logelodi.com <br />September 26, 2022 <br />Project Number: 2241 <br />Gloria Cullen <br />4820 S. Escalon-Bellota Rd. <br />Farmington, CA 95230 <br />Regarding: Percolation Test <br />APN 187-120-26 & -27 (1.4 Acres) <br />Farmington, California <br />Ms. Cullen: <br />Per your request, Live Oak GeoEnvironmental, Inc. (Live Oak) has completed a percolation test <br />for the subject Site, located at the southeast corner of Escalon-Bellota Road and Elm Street, <br />Farmington, California (Plate 1). The Site is a former railroad property and extends partially into <br />Littlejohn's Creek (dry) at its southeast end. We understand that you are constructing a house <br />on the Site, and the San Joaquin County Environmental Health Department is requiring the <br />completion of a percolation test before the septic permit can be issued. <br />Soil Boring <br />On September 20, 2022, Live Oak excavated shallow and deep soil borings on the Site for the <br />purpose of percolation testing. The borings were four inches in diameter, 2.23 and 9.49 feet <br />deep, and were excavated by hand auger. The location of the borings is indicated on the <br />attached Plate 2. <br />Soil Log <br />The soil in the borings was observed to be silty clay to a depth of 1.5 foot, followed by silty <br />clay with fine sand to a depth of approximately 5 feet, followed by silty lean clay to the full <br />depth of the deep hole. <br />Preparation and Presaturation of Percolation Test Hole <br />After the borings were advanced, the test holes were completed for the percolation testing. <br />Approximately two inches of pea gravel were placed in the bottom of each open soil boring, <br />followed by a 2.0 -inch diameter PVC pipe with perforations on the bottom. Pea gravel was <br />then used to backfill a few inches of the annular space. <br />Live Oak presaturated the percolation test holes approximately 24 hours prior to the <br />percolation testing. The holes were filled with water to a height of 12 inches above the bottom <br />of the boring for the presaturation. On the day of testing, both holes were found to be intact <br />and dry. <br />Environmental Engineering Geology Geophysics <br />