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January 28, 2022 Lab ID : STK2230878-001 Customer ID : 3-17919 San Joaquin Co. Environmental Health Dep Sampled On : January 18, 2022-11:15 Sampled By : Aldara Salinas Received On : January 18, 2022-12:06 Water Quality Division Attn: Michael Kith 1868 East Hazelton Ave. Stockton, CA 95205 Matrix : Drinking Water Description : Wellhead Project : 24184 S. Cabe Rd., Tracy, CA 95304 This Page is to be Stamped Sample Result - Inorganic Sample Preparation Sample Analysis Constituent Result PQL Units MCL/AL Method Date/ID Method Date/ID General Mineral Total Hardness as CaCO3 196 2.5 mg/L 200.7 01/19/22:200718 200.7 01/19/22:200994 Calcium 49 1 mg/L 200.7 01/19/22:200718 200.7 01/19/22:200994 Magnesium 18 1 mg/L 200.7 01/19/22:200718 200.7 01/19/22:200994 Potassium 3 1 mg/L 200.7 01/19/22:200718 200.7 01/19/22:200994 Sodium 78 1 mg/L 200.7 01/19/22:200718 200.7 01/19/22:200994 Total Cations 7.4 --- meq/L 200.7 01/19/22:200718 200.7 01/19/22:200994 Boron 0.8 0.1 mg/L 200.7 01/19/22:200718 200.7 01/19/22:200994 Copper 50 10 ug/L 10002 200.7 01/19/22:200718 200.7 01/19/22:200994 Iron 350 30 ug/L 3002 200.7 01/19/22:200718 200.7 01/19/22:200994 Manganese 110 10 ug/L 502 200.7 01/19/22:200718 200.7 01/19/22:200994 Zinc 40 20 ug/L 200.7 01/19/22:200718 200.7 01/19/22:200994 SAR 2.4 0.1 -- 200.7 01/19/22:200718 200.7 01/19/22:200994 Total Alkalinity (as CaCO3) 110 10 mg/L 2320B 01/22/22:200840 2320B 01/23/22:201117 Hydroxide as OH ND 10 mg/L 2320B 01/22/22:200840 2320B 01/23/22:201117 Carbonate as CO3 ND 10 mg/L 2320B 01/22/22:200840 2320B 01/23/22:201117 Bicarbonate as HCO3 140 10 mg/L 2320B 01/22/22:200840 2320B 01/23/22:201117 Sulfate 148 0.5 mg/L 5002 300.0 01/19/22:200703 300.0 01/19/22:200991 Chloride 83 1 mg/L 5002 300.0 01/19/22:200703 300.0 01/19/22:200991 Nitrate as NO3 11.5 0.4 mg/L 45 300.0 01/19/22:200703 300.0 01/19/22:200991 Nitrite as N 0.6 0.2 mg/L 1 300.0 01/19/22:200703 300.0 01/19/22:200991 Nitrate + Nitrite as N 3.2 0.1 mg/L 10 300.0 01/19/22:200703 300.0 01/19/22:200991 Fluoride ND 0.1 mg/L 2 300.0 01/19/22:200703 300.0 01/19/22:200991 Total Anions 7.9 --- meq/L 2320B 01/22/22:200840 2320B 01/23/22:201117 pH (Field) 7.73 --- units 4500-H B 01/18/22:200851 4500HB 01/18/22:201120 Specific Conductance 796 1 umhos/cm 16002 2510B 01/20/22:200727 2510B 01/20/22:200964 Total Dissolved Solids 500 20 mg/L 10002 2540CE 01/20/22:200741 2540C 01/21/22:201042 MBAS Extraction ND 0.1 mg/L 0.52 5540C 01/19/22:201030 5540C 01/19/22:201365 Aggressiveness Index 11.9 1 -- 4500-H B 01/18/22:200851 4500HB 01/18/22:201120 Langelier Index (20°C) -0.008 1 -- 4500-H B 01/18/22:200851 4500HB 01/18/22:201120 Nitrate Nitrogen 2.6 0.1 mg/L 10 300.0 01/19/22:200703 300.0 01/19/22:200991 ND=Non-Detected. PQL=Practical Quantitation Limit. * PQL adjusted for dilution. MCL = Maximum Contamination Level. 2 - Secondary Standard. 3 - CDPH Notification Level. AL = Regulatory Action Level. Corporate Offices & Laboratory 853 Corporation Street Santa Paula, CA 93060 TEL: (805)392-2000 Env FAX: (805)525-4172 / Ag FAX: (805)392-2063 CA ELAP Certification No. 1573 Office & Laboratory 2500 Stagecoach Road Stockton, CA 95215 TEL: (209)942-0182 FAX: (209)942-0423 CA ELAP Certification No. 1563 Office & Laboratory 563 E. Lindo Avenue Chico, CA 95926 TEL: (530)343-5818 FAX: (530)343-3807 CA ELAP Certification No. 2670 Office & Laboratory 9415 W. Goshen Avenue Visalia, CA 93291 TEL: (559)734-9473 FAX: (559)734-8435 CA ELAP Certification No. 2810 Office & Laboratory 3442 Empresa Drive, Suite D San Luis Obispo, CA 93401 TEL: (805)783-2940 FAX: (805)783-2912 CA ELAP Certification No. 2775 ENVIRONMENTAL AGRICULTURAL Analytical Chemists