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ENVI.O Analytical Chemists October 19, 2021 Lab ID : STK2154075-001 Customer ID : 3-17919 San Joaquin Co.Environmental Health Dep Water Quality Division Sampled On : September 30, 2021-09:20 Attn: Michael Kith Sampled By : Francisco Garcia Rui 1868 East Hazelton Ave. Received On : September 30, 2021-13:45 Stockton, CA 95205 Matrix : Drinking Water Description : Wellhead Project : 16727 Brandt Wy.,Clements CA Sample Result - Inorganic Constituent Result PQL Units MCUAL Sample Preparation Sample Analysis Method Date/ID Method Date/lD General Mineral Total Hardness as CaCO3 52.1 2.5 mg/L 200.7 10/06/21:211596 200.7 10/06/21:215674 Calcium 11 I mg/L 200.7 10/06/21:211596 200.7 10/06/21:215674 Magnesium 6 1 mg/L 200.7 10/06/21:211596 200.7 10/06/21:215674 Potassium 6 1 mg/L 200.7 10/06/21:211596 200.7 10/06/21:215674 Sodium 19 1 mg/L 200.7 10106/21:211596 200.7 10/06/21:215674 Total Cations 2.0 --- meq/L 200.7 10/06/21:211596 200.7 10/06/21:215674 Boron ND 0.1 mg/L 200.7 10/06/21:211596 200.7 10/06/21:215674 opper ND 10 ug/L 10002 200.7 10/06/21:211596 200.7 10/06/21:215674 Iron 40 30 ug/L 3002 200.7 10/06/21:211596 200.7 10/06/21:215674 Manganese 50 10 ug/L 502 200.7 10/06/21:211596 200.7 10/06/21:215674 Zinc ND 20 ug/L 200.7 10/06/21:211596 200.7 10/06/21:215674 SAR 1.1 0.1 -- 200.7 10/06/21:211596 200.7 10/06/21:215674 Total Alkalinity(as CaCO3) 80 10 mg/L 2320B 10/11/21:211783 2320B 10/12/21:215898 Hydroxide as OH ND 10 mg/L 2320B 10/11/21:211783 2320B 10/12/21:215898 Carbonate as CO3 ND 10 mg/L 2320B 10/11/21:211783 2320B 10/12/21:215898 Bicarbonate as HCO3 90 10 mg/L 2320B 10/11/21:211783 2320B 10/12/21:215898 Sulfate 0.6 0.5 mg/L 5002 300.0 10/01/21:211396 300.0 10/02/21:215448 Chloride 9 1 mg/L 5002 300.0 10/01/21:211396 300.0 10/02/21:215448 Nitrate as NO3 ND 0.4 mg/L 45 300.0 10/01/21:211396 300.0 10/02/21:215448 Nitrite as N ND 0.2 mg/L 1 300.0 10/01/21:211396 300.0 10/02/21:215448 Nitrate+Nitrite as N ND 0.1 mg/L 10 300.0 10/01/21:211396 300.0 10/02/21:215448 uoride 0.2 0.1 mg/L 2 300.0 10/01/21:211396 300.0 10/02/21:215448 Total Anions 1.8 --- meq/L 2320B 10/11/21:211783 2320E 10/12/21:215898 pH(Field) 8.03 --- units 4500-H B 09/30/21:211462 4500HB 09/30/21:215408 Specific Conductance 192 1 umhos/cm 16002 2510B 10/13/21:211848 2510B 10/13/21:215925 Total Dissolved Solids 170 20 mg/L 10002 2540CE 10/05/21:211543 2540C 10/06/21:215573 MB AS Extraction ND 0.1 mg/L 0.52 55400 10/01/21:211493 55400 10/01/21:215464 Aggressiveness Index 11.4 1 -- 4500-H B 09/30/21:211462 4500HB 09/30/21:215408 Langelier Index(20°C) -0.4 1 -- 4500-H B 09/30/21:211462 4500HB 09/30/21:215408 Nitrate Nitrogen ND 0.1 mg/1L 10 300.0 10/01/21:211396 300.0 10/02/21:215448 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.Undo 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