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TUL <br /> ENVIRONMENTAL AGRICULTURAL <br /> Analytical Chemists <br /> May 15, 2026 <br /> Lab No. : STK2636375-001 <br /> San]oaquin Co. Environmental Health Dep Customer No.: 3017919 <br /> Description :Wellhead Matrix : Drinking Water <br /> Project :25333 S. Frederick Rd., Ripon- Sampled On : May 5, 2026 at 09:40 <br /> AP2502342 <br /> Drinking Water Interpretations <br /> Summary: Your water has a failure to meet maximum contaminant levels (MCLs) for one or more items on <br /> this sample report. Please see the table below to determine which items failed. Following the table is a brief <br /> explanation describing the significance of the failure and whether treatment may be required. <br /> Constituent Result Units MCL Result Compared to MCL <br /> Inorganic-Primary Less Than or Equal Exceeded <br /> Fluoride ND mg/L 2 PASS <br /> Nitrate+Nitrite as N ND mg/L 10 PASS <br /> Nitrate as NO3 0.5 mg/L 45 PASS <br /> Nitrate Nitrogen ND mg/L 10 PASS <br /> Nitrite as N ND mg/L 1 PASS <br /> Zinc ND ug/L 5000 PASS <br /> Inorganic-Secondary Less Than or Equal Exceeded <br /> Chloride 530 mg/L 500 FAIL <br /> Copper ND ug/L 1000 PASS <br /> Iron ND ug/L 300 PASS <br /> Manganese 400 ug/L 50 FAIL <br /> Specific Conductance 1950 umhos/cm 1600 FAIL <br /> Sulfate 2.5 mg/L 500 PASS <br /> Total Dissolved Solids 1520 mg/L 1000 FAIL <br /> Other Less Than or Equal Exceeded <br /> Copper ND ug/L 1300** PASS <br /> Drinking Water Interpretations without MCL <br /> InterpretationConstituent Result Units Range <br /> Aggressiveness Index 12.1 1 --- >12 Non-Aggressive. <br /> Langelier Index(20°C) 0.2 -- >0 Water is supersaturated with respect to calcium carbonate <br /> (CaCO3)and scale forming may occur. <br /> ND=Non-Detect <br /> Definitions <br /> MCL The maximum level at which a constituent may be present and be considered acceptable for potability or aesthetics. <br /> Primary Items listed as primary are regulated because of health concerns.If there is a failure for a primary constituent <br /> treatment is normally required. <br /> Secondary Items listed as secondary are regulated because they may adversely affect the taste, odor or appearance of drinldng <br /> water.They are not directly health related.If there is a failure for a secondary constituent on a small public water <br /> system it is best to consult your regulator to determine if treatment is required.A secondary constituent failure for a <br /> private water system does not require treatment. However,the owner may wish to treat the water in order to <br /> improve the quality. <br /> Section:Drinking Water Interpretations Page 4 of 8 Page 4 of 8 <br /> Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory <br /> 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9411 W.Goshen Avenue <br /> Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 <br /> TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 <br /> CA ELAP Certification No.1573 CA ELAP Certification No.1563 CA ELAP Certification No.2670 CA ELAP Certification No.2775 CA ELAP Certification No.2810 <br />