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ENVIRONMENTAL��—"� ."GRICULTURAL <br /> Analytical Chemists <br /> December 17, 2025 <br /> Lab No. : STK2558283-001 <br /> San Joaquin Co. Environmental Health Dep Customer No.: 3017919 <br /> Description :Well Head Matrix : Drinldng Water <br /> Project :891 Manila Road ,Lathrop / Sampled On : December 2, 2025 at 08:46 <br /> WP2501139 <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 0.4 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 1000 mg/L 500 FAIL <br /> Copper 10 ug/L 1000 PASS <br /> Iron 1160 ug/L 300 FAIL <br /> Manganese 670 ug/L 50 FAIL <br /> Specific Conductance 3310 umhos/cm 1600 FAIL <br /> Sulfate 18.8 mg/L 500 PASS <br /> Total Dissolved Solids 2350 m /L 1000 FAIL <br /> Other Less Than or Equal Exceeded <br /> Copper 10 ug/L 1300** PASS <br /> Drinking Water Interpretations without MCL <br /> Constituent Result Units Range Interpretation <br /> Aggressiveness Index 12.3 --- >12 Non-Aggressive. <br /> Langelier Index(20°C) 0.3 >0 Water is supersaturated with respect to calcium carbonate <br /> I(CaCO3)and scale forming may occur. <br /> Drinking Water Interpretations without MCL <br /> Constituent, Result Units Range Interpretation <br /> Aggressiveness Index 12.3 --- >12 Non-Aggressive. <br /> Langelier Index(20°C) 0.3 >0 Water is supersaturated with respect to calcium carbonate <br /> I(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 /> Section:Drinldng Water Interpretations Paae 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 />