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UC <br /> SANdOAQUIN p Environmental Health De artment <br /> COUNTY- Jasjit Kang, REHS, Director <br /> Greotness grows here. Muniappa Naidu, REHS,Assistant Director <br /> PROGRAM COORDINATORS <br /> Jeff Carruesco, REHS, RDI <br /> Willy Ng, REHS <br /> Steven Shih, REHS <br /> Elena Manzo, REHS <br /> Natalia Subbotnikova, REHS <br /> WELL WATER TEST RESULTS <br /> December 16, 2025 <br /> JASON P GUTHMILLER <br /> 266 S. HEWITT ROAD, <br /> LINDEN, CA 95236-969 <br /> Location: 266 S. Hewitt Road, Linden CA 95236 <br /> Sampling Date: October 28, 2025 <br /> Record ID: WP2500982 <br /> The San Joaquin County Environmental Health Department (EHD) requires well sampling as part of the <br /> permitting process for any new or replacement domestic well. San Joaquin County Well Standards <br /> section 9-9.2.1* states "To determine quality of water produced by a new water well, it shall be sampled <br /> by the EHD for bacteriological and chemical analysis after development, the installation of the well pump, <br /> and disinfection." The cost of sampling was included with the well permit issuance. <br /> We have sampled your new well and have received your results. Your water sample was analyzed by <br /> FGL Stockton Laboratory, a state certified lab. <br /> The well water results have FAILED the bacteriological (Coliform/E-Coli) — Total Coliform and General <br /> Mineral — Manganese established criteria. <br /> Contaminant Result MCL** <br /> TOTAL COLIFORM PRESENT ABSENT <br /> E. Coli ABSENT ABSENT <br /> MANGANESE 130 /L 50 /L <br /> The well water PASSED the criteria for the other analyses: bacteriological (Coliform/E-Coli) — E. Coli, <br /> and General Mineral. <br /> For more information and possible health effects, please refer to the attachments along with the full <br /> analytical results. If you have any questions, you may contact Sastina Thammavongsa, Registered <br /> Environmental Health Specialist, at (209) 616-3068 or email sthammavongsa@sjgov.org. <br /> Steven Shih, REHS <br /> Program Coordinator <br /> *As authorized by San Joaquin County Ordinance code section 9-1115.6 <br /> **MCL: The maximum contaminant level is the highest level of contaminant considered acceptable for <br /> potable water. <br /> 1868 E. Hazelton Avenue I Stockton, California 952051 T 209 468-3420 1 F 209 468-3877 1 www.sjgov.org/ehd <br />