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ow- ENVIRONMENTALFGL . , Analytical Chemists May 5,2021 Lab ID : STK2135321-001 Customer ID : 3-17919 San Joaquin Co.Environmental Health Dep Water Quality Division Sampled On : April 20,2021-09:45 Attn: Michael Kith Sampled By : Francisco Garcia Rui 1868 East Hazelton Ave. Received On : April 20,2021-11:25 Stockton, CA 95205 Matrix : Drinking Water Description : Wellhead Project : 7095 Sedan Ave.,Manteca 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 95.3 2.5 mg/L 200.7 04/23/21:204426 200.7 04/27/21:206202 Calcium 25 1 mg/L 200.7 04/23/21:204426 200.7 04/27/21:206202 Magnesium 8 1 mg/L 200.7 04/23/21:204426 200.7 04/27/21:206202 Potassium 3 1 mg/1. 200.7 04/23/21:204426 200.7 04/27/21:206202 Sodium 30 1 mg/L 200.7 04/23/21:204426 200.7 04/27/21:206202 Total Cations 3.3 --- meq/L. 200.7 04/23/21:204426 200.7 04/27/21:206202 Boron 0.1 0.1 mg/L 200.7 04/23/21:204426 200.7 04/27/21:206202 Copper ND 10 ug/L 10002 200.7 04/23/21:204426 200.7 04/27/21:206202 Iron ND 30 ug/L 3002 200.7 04/23/21:204426 200.7 04/27/21:206202 Manganese ND 10 ug/L 502 200.7 04/23/21:204426 200.7 04/27/21:206202 inc ND 20 ug/L 200.7 04/23/21:204426 200.7 04/28/21:206266 SAR 1.3 0.1 -- 200.7 04/23/21:204426 200.7 04/27/21:206202 Total Alkalinity(as CaCO3) 110 10 mg/L 2320B 04/28/21:204645 2320E 04/29/21.206304 Hydroxide as OH ND 10 mg/L 2320B 04/28/21:204645 2320B 04/29/21:206304 arbonate as CO3 ND 10 mg/L 2320B 04/28/21:204645 2320B 04/29/21:206304 Bicarbonate as HCO3 140 10 mg/L 2320B 04/28/21:204645 2320B 04/29/21:206304 Sulfate 15.1 0.5 mg/L 5002 300.0 04/21/21:204260 300.0 04/21/21:205910 Chloride 14 1 mg/L 5002 300.0 04/21/21:204260 300.0 04/21/21:205910 Nitrate as NO3 21.7 0.4 mg/L 45 300.0 04/21/21:204260 300.0 04/21/21:205910 itrite as N ND 0.2 mg/L 1 300.0 04/21/21:204260 300.0 04/21/21:205910 Nitrate+Nitrite as N 4.9 0.1 mg/L 10 300.0 04/21/21:204260 300.0 04/21/21:205910 Fluoride 0.1 0.1 mg/L 2 300.0 04/21/21:204260 300.0 04/21/21:205910 Total Anions 3.4 --- meq/L 2320B 04/28/21:204645 2320E 04/29/21:206304 pH(Field) 8.3 -- units 4500-H B 04/20/21:204576 04/20/21:206153 Specific Conductance 332 1 umhos/Cm 16002 2510B 04/29/21:204660 2510B 04/29/21:206262 Total Dissolved Solids 230 20 mg/L 10002 2540CE 04/22/21:204369 2540C 04/23/21:205939 MBAS Extraction ND 0.1 mg/L 0.52 5540C 04/21/21:204477 55400 04/21/21:206004 Aggressiveness Index 12.1 1 -- 4500-H B 04/20/21:204576 04/20/21:206153 Langelier Index(20°C) 0.3 1 -- 4500-H B 04/20/21:204576 04/20/21:206153 Nitrate Nitrogen 1 4.9 1 0.1 1m 10 1 300.0 04/21/21:204260 1 300.0 03'21,21:205910 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.Linde,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