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LIVE OAK GEO ENVIRONMENTAL, INC. 407 W. Oak 5t., Lodi, CA 95240 s (209)369-0375 •:• logelodi.com February 8, 2023 Project Number: 2303 Randy Marston 17170 E. Front St. Linden CA 95236 Regarding: Percolation Test Marston Property APN 065-190-12 20797 E. Frazier Rd., Linden, CA (10.0 Acres) Dear Mr. Marston: Per your request, Live Oak GeoEnvironmental, Inc. (Live Oak) has completed a percolation test for the subject Site located at 20797 East Frazier Road, Linden, California (Plate 1). We understand that you plan to construct a house on the Site, and the San Joaquin County Environmental Health Department is requiring the completion of a percolation test before the septic permit can be issued. Soil Boring On February 2, 2023, Live Oak excavated a shallow soil boring on the Site for the purpose of percolation testing. The boring was four inches in diameter, 3.39 feet deep, and was excavated by hand auger. The location of the boring is indicated on the attached Plate 2. Soil Loc The soil in the boring was observed to be silty sand to a depth of 1.7 feet, followed by sandy clay to 2.0 feet, partially cemented clay with sand to 3.4 feet, and very fine sand with silt to the full depth of the hole. Preparation and Presaturation of Percolation Test Hole After the boring was advanced, the test hole was completed for the percolation testing. Approximately two inches of pea gravel were placed in the bottom of the 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 hole approximately 24 hours prior to the percolation testing. The 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 hole was found to be intact and dry. Environmental Engineering Geology •:• Geophysics