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1117111�- .O Analytical Chemists January 28,2022 Lab ID : STK2230878-001 Customer ID : 3-17919 San Joaquin Co.Environmental Health Dep Water Quality Division Sampled On : January 18, 2022-11:15 Attn: Michael Kith Sampled By : Aldara Salinas 1868 East Hazelton Ave. Received On : January 18, 2022-12:06 Stockton, CA 95205 Matrix : Drinking Water Description : Wellhead Project : 24184 S. Cabe Rd.,Tracy, CA 95304 Sample Result- Inorganic Constituent Result PQL Units MCL/AL Sample Preparation Sample Analysis 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 anganese 110 10 ug/L 502 200.7 01/19/22:200718 200.7 01/19/22:200994 inc 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 2320E 01/23/22:201117 Bicarbonate as HCO3 140 10 mg/L 2320B 01/22/22:200840 2320E 01/23/22:201117 Sulfate 148 0.5 mg/L 5002 300.0 01/19/22:200703 300.0 01/19/22:200991 hlonde -- --83 --1 -Mg/U---5002--- -300.0 01719722:200703 -300-.0- 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 H(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 25400 01/21/22:201042 BAS Extraction ND 0.1 mg/L 0.52 5540C 01/19/22:201030 55400 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 1 2.6 1 0.1 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. Page 3 of 9 Corporate Offices&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory Office&Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo Avenue 3442 Empresa Drive,Suite D 9415 W.Goshen Avenue Santa Paula,CA 93060 Stockton,CA 95215 Chico,CA 95926 San Luis Obispo,CA 93401 Visalia,CA 93291 TEL:(805)392-2000 TEL:(209)942-0182 TEL:(530)343-5818 TEL:(805)783-2940 TEL:(559)734-9473 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 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