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23304 S. Hansen Road, Tracy CA 95304 Page 2 of 2 <br /> July 8, 2026 <br /> NOTE: The water sample taken by Live Oak Geo Environmental before the addition of the <br /> proposed ADU was above the MCL of 10 mg/L-N at 12.7 mg/L - N. With the addition of the <br /> proposed ADU, the nitrate levels may continue to rise. Annual sampling will be required as part <br /> of the installation of the new septic system. Annual sampling fee is based on the current hourly <br /> rate ($179). <br /> 5. It is the owner's responsibility to follow operation and maintenance plan to ensure the system <br /> meets all requirements set forth in the design in conformity with San Joaquin County (OWTS) <br /> Standard. <br /> 6. Any additions or modifications to the site not described in the report will require an addendum <br /> based on the current fee schedule. <br /> If you have any questions, please call Sastina Thammavongsa, Registered Environmental Health <br /> Specialist, at (209) 616-3068 or sthammavongsa@sjgov.org. <br /> Steven Shih, REHS ,9" <br /> Program Coordinator <br /> CC: Gesaranee Wongphiboonrat, 23304 S. Hansen Road, Tracy CA 95304, gesaranee@live.com <br />