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LIVE OAK GEO ENVIRONMENTAL, INC. <br /> A-i- * <br /> 407 W. Oak St., Lodi, CA 95240 •: (209) 369-0375 •: logelodi.com <br /> July 2, 2020 RECEIVED <br /> Project Number: 20-18b <br /> Michael Kith, Lead REHS JUL 02 20 <br /> San Joaquin County Environmental Health Department ENVIRONMENTAL <br /> HEALTH <br /> E)E1868 E. Hazelton Ave. <br /> Stockton, CA 95205 <br /> Regarding: Addendum to Soil Suitability/Nitrate Loading Study <br /> APN 257-220-37 <br /> 7670 E. Melton Rd., Manteca, CA SIGao go16 <br /> Original report dated May 13, 2019 <br /> Mr. Kith: <br /> Per the request of Matthew Ng, Live Oak GeoEnviron mental, Inc. (Live Oak) has completed a <br /> percolation test for the subject Site. We understand that Mr. Ng is building a new home, <br /> located at 7670 East Melton Road, Manteca, California (Plate 1). <br /> Live Oak previously completed a percolation test on the project Site on May 1, 2019, with a <br /> percolation rate of 4.63 min/in; and a second test on April 28, 2020, with a percolation rate of <br /> 22.7 min/in. You suggested that Live Oak complete a third percolation test within the existing <br /> orchard to better evaluate whether a standard septic system is appropriate. <br /> This letter serves as an addendum to our original Soil Suitability/Nitrate Loading Study, dated <br /> May 13, 2019, which included a discussion of the May 1, 2019 percolation test. This letter <br /> should be considered an addition to the sections titled "Soil Borings," "Discussion of Soil <br /> Lithology," "Percolation Test," "Preparation and Presaturation of Percolation Test Holes," <br /> "Percolation Test Procedure," "Percolation Test Results," "Discussion of Percolation Test <br /> Results," and "Discussion of Septic Sizing," from page 4 to page 6 of the report. The third <br /> paragraph of the conclusions on page 11 of the original report should also be considered <br /> modified, as the results of the latest percolation test allow the use of a standard, shallow septic <br /> system on the Site. <br /> Soil Boring <br /> On June 15, 2020, Live Oak excavated a shallow soil boring on the Site for the purpose of <br /> conducting a percolation test. The boring was four inches in diameter, 3.34 feet deep, and <br /> was excavated by hand auger. The location of the boring is indicated on the attached Plate 2. <br /> Soil Log <br /> The soil in the boring was observed to be sandy silt to a depth of two feet, followed by partially <br /> cemented sandy silt with clay to the full depth of the hole. Live Oak identifies soil types using <br /> the Unified Soil Classification System visual-manual procedure. <br /> Environmental -% Engineering Geology : Geophysics <br />