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May 12, 2021 Lab ID : STK2135658-001 San Joaquin Co. Environmental Health Dep Water Quality Division Attn: Michael Kith 1868 East Hazelton Ave. Stockton, CA 95205 Description : Wellhead Project : 18739 Clements Rd., Lodi, CA 95240 Customer ID : 3-17919 Sampled On : April 26, 2021-11:15 Sampled By : Francisco Garcia Rui Received On : April 26, 2021-14:20 Matrix : Drinking Water Sample Result - Inorganic Constituent Result PQL Units MCL/AL Sample Preparation Method Date/ID Sample Analysis Method Date/ID General Mineral Total Hardness as CaCO3 121 2.5 mg/L 200.7 05/10/21:205125 200.7 05/10/21:206931 Calcium 27 1 mg/L 200.7 05/10/21:205125 200.7 05/10/21:206931 Magnesium 13 1 mg/L 200.7 05/10/21:205125 200.7 05/10/21:206931 otassium 5 1 mg/L 200.7 05/10/21:205125 200.7 05/10/21:206931 Sodium 24 1 mg/L 200.7 05/10/21:205125 200.7 05/10/21:206931 Total Cations 3.6 --- meq/L 200.7 05/10/21:205125 200.7 05/10/21:206931 Boron ND 0.1 mg/L 200.7 05110/21:205125 200.7 05/10/21:206931 Copper ND 10 ug/L 10002 200.7 05/10/21:205125 200.7 05/10/21:206931 Iron 320 30 ug/L 3002 200.7 05/10/21:205125 200.7 05/10/21:206931 Manganese 80 10 ug/L 502 200.7 05/10/21:205125 200.7 05/10/21:206931 Inc 50 20 ug/L 200.7 05/10/21:205125 200.7 05/10/21:206931 AR 0.9 0.1 -- 200.7 05/10/21:205125 200.7 05/10/21:206931 Total Alkalinity (as CaCO3) 100 10 mg/L 2320B 05/03/21:204829 2320B 05/03/21:206565 ydroxide as OH ND 10 mg/L 2320B 05/03/21:204829 2320B 05/03/21:206565 Carbonate as CO3 ND 10 mg/L 2320B 05/03/21:204829 2320B 05/03/21:206565 Bicarbonate as HCO3 130 10 mg/L 2320B 05/03/21:204829 2320B 05/03/21:206565 Sulfate 10.6 0.5 mg/L 5002 300.0 04/27/21:204541 300.0 04/27/21:206329 Chloride 36 1 mgAL 5002 300.0 04/27121:204541 300.0 04/27/21:206329 Nitrate as NO3 9.7 0.4 mgAL 45 300.0 04/27/21:204541 300.0 04/27/21:206329 Nitrite as N ND 0.2 mg/L 1 300.0 04/27/21:204541 300.0 04/27/21:206329 Nitrate + Nitrite as N 2.2 0.1 mg/L 10 300.0 04/27/21:204541 300.0 04/27/21:206329 Fluoride 0.2 0.1 mg/L 2 300.0 04/27/21:204541 300.0 04/27/21:206329 Total Anions 3.5 --- meq/I. 2320B 05/03/21:204829 2320B 05/03/21:206565 pH (Field) 7.5 -- units 4500-H B 04/26/21:204807 04/26/21:206461 Specific Conductance 367 1 umhos/cm 16002 2510B 05/04/21:204853 2510B 05/04/21:206527 Total Dissolved Solids 260 20 mg/L 10002 2540CE 04/29/21:204691 2540C 04/30/21:206380 AS Extraction ND 0.1 mg/L 0.52 5540C 04/28/21:204727 55400 04/28/21:206370 Aggressiveness Index 11.3 1 -- 4500-H B 04/26/21:204807 04/26/21:206461 Langelier Index (20°C) -0.5 1 -- 4500-H B 04/26/21:204807 04/26/21:206461 Nitrate Nitrogen 2.2 0.1 MgAL 10 300.0 04/27121:204541 300.0 04/27/21:206329 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 Office & Laboratory Office & Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E. Undo Avenue Santa Paula, CA 93060 Stockton, CA 95215 Chico, CA 95926 TEL: (805)392-2000 TEL: (209)942-0182 TEL: (530)343-5818 Env FAX: (805)525-4172 / Ag FAX: (805)392-2063 FAX: (209)942-0423 FAX: (530)343-3807 CA ELAP Certification No. 1573 CA ELAP Certification No. 1563 CA ELAP Certification No. 2670 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 Page 3 of 9 Office & Laboratory 9415 W. Goshen Avenue Visalia, CA 93291 TEL: (559)734-9473 FAX: (559)734-8435 CA ELAP Certification No. 2810