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ENVIRONMENTAL_, Analytical Chemists January 3, 2022 Lab ID : STK2158017-001 Customer ID : 3-17919 San Joaquin Co.Environmental Health Dep Water Quality Division Sampled On : December 16, 2021-10:30 Attn: Michael Kith Sampled By : Aaron Gooderham 1868 East Hazelton Ave. Received On : December 16, 2021-12:05 Stockton, CA 95205 Matrix : Drinking Water Description : Wellhead Project : 19468 Santa Fe Road Sample Result - Inorganic Constituent Result PQL UnitsMCL/AL Sample Preparation Sample Analysis Method Date/ID Method Date/ID General Mineral Total Hardness as CaCO3 152 2.5 mg/L 200.7 12nO/21:214622 200.7 12/20/21:219657 Calcium 33 1 mg/L 200.7 t2no/21:214622 200.7 12/20/21:219657 Magnesium 17 1 mg/L 200.7 12/20/21:214622 200.7 12/20/21:219657 otassium 5 1 mg/L 200.7 12/20/21:214622 200.7 12/20/21:219657 Sodium 24 1 mg/L 200.7 12/20/21:214622 200.7 12n0/21:219657 Total Cations 4.2 --- meq/L 200.7 12/20/21:214622 200.7 12/20/21:219657 Boron ND 0.1 mg/L 200.7 12120/21:214622 200.7 12/20/21:219657 Copper ND 10 ug/L 10002 200.7 12/20/21:214622 200.7 12/20/21:219657 Iron ND 30 ug/L 3002 200.7 12/20/21:214622 200.7 12/20/21:219657 Manganese ND 10 ug/L 502 200.7 12no/21:214622 200.7 12n0/21:219657 Zinc ND 20 ug/L 200.7 12/20/21:214622 200.7 12/20/21:219657 SAR 0.8 0.1 -- 200.7 12/20/21:214622 200.7 12/20/21:219657 Total Alkalinity(as CaCO3) 130 10 mg/L 23208 12/22/21:214754 23208 12123121:219774 Hydroxide as OH ND 10 mg/L 2320E 12n2/21:214754 2320E 12n3/21:219774 Carbonate as CO3 ND 10 mg/L 23208 12/22/21:214754 23208 12/23/21:219774 Bicarbonate as HCO3 150 10 mg/L 2320E 12/22/21:214754 2320B 12n3/21:219774 Sulfate 29.0 0.5 mg/L 500' 300.0 12117/21:214556 300.0 12/17/21:219611 Chloride 5 1 mg/L 500'` 300.0 12/17/21:214556 300.0 12/17/21:219611 Nitrate as NO3 43.1 0.4 mg/L 45 300.0 12/17/21:214556 300.0 12/17/21:219611 Nitrite as N ND 0.2 mg/L 1 300.0 12/17/21:214556 300.0 12/17/21:219611 Nitrate+Nitrite as N 9.7 0.1 mg/L 10 300.0 12/17/21:214556 300.0 12/17/21:219611 Fluoride 0.1 0.1 mg/L 2 300.0 12/17/21:214556 300.0 12/17/21:219611 Total Anions 3.9 --- meq/]L 2320B 12/22/21:214754 2320B 12/23/21:219774 pH(Field) 7.89 --- units 4500-H B 12/16/21:214595 4500HB 12/16/21:219567 Specific Conductance 406 1 umhos/cm 16002 2510B 12/23/21:214759 2510B 12n3/21:219776 Total Dissolved Solids 300 20 mg/L 10002 2540CE 12/17/21:214558 2540C 12/20/21:219598 AS Extraction ND 0.1 mg/L 0.52 5540C 12/18/21:214848 5540C 12/18/21:219861 Aggressiveness Index 11.9 1 -- 4500-H B 12/16/21:214595 4500HB 12/16/21:219567 PLangelier Index(20°C) 0.08 1 -- 4500-H B 12/16/21:214595 4500HB 12/16/21:219567 Nitrate Nitrogen 9.7 ().I mg/L 10 1 300.0 12/17/21:214556 300.0 12/17/21:219611 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