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ENVIRONMENTAINW. . , Analytical Chemists June 14, 2023 Lab No. : STK2336961-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 30, 2023 at 10:45 1868 East Hazelton Ave. Sampled By : Francisco Garcia Rui Stockton, CA 95205 Received On : May 30, 2023 at 11:30 Description :Wellhead Matrix : Drinking Water Project :26914 Jones Rd,Escalon CA- WP0043680 Sample Results - Inorganic • ,. General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 137 2.5 mg/L 1 06/01/2023 08:00 ac 2340B 06/01/2023 14:08 ac Calcium 35 1 mg/L 1 06/01/2023 08:00 ac EPA 200.7 06/01/2023 14:08 ac Magnesium 12 1 mg/L 1 06/01/2023 08:00 ac EPA 200.7 06/01/2023 14:08 ac Potassium 3 1 mg/L 1 06/01/2023 08:00 ac EPA 200.7 06/01/2023 14:08 ac Sodium 22 1 mg/L 1 06/01/2023 08:00 ac EPA 200.7 06/01/2023 14:08 ac Total Cations 3.8 --- meq/L 1 06/01/2023 08:00 ac Calc. 06/01/2023 14:08 ac Boron ND 0.1 mg/L 1 U 06/01/2023 08:00 ac EPA 200.7 06/01/2023 14:08 ac Copper ND 10 ug/L 10002 1 U 06/01/2023 08:00 ac EPA 200.7 06/01/2023 14:08 ac Iron ND 30 ug/L 3002 1 U 06/01/2023 08:00 ac EPA 200.7 06/01/2023 14:08 ac Manganese ND 10 ug/L 502 1 U 06/01/2023 08:00 ac EPA 200.7 06/01/2023 14:08 ac Zinc ND 20 ug/L 1 U 06/01/2023 08:00 ac EPA 200.7 06/01/2023 14:08 ac SAR 0.8 0.1 1 06/01/2023 08:00 ac Calc. 06/01/2023 14:08 ac Total Alkalinity(as CaCO3) 130 10 mg/L 1 06/06/2023 19:10 amm SM 4500-H+B 06/07/2023 01:15 amm Hydroxide as OH ND 10 mg/L 1 UI 06/06/2023 19:10 amm SM 4500-H+B 06/07/2023 01:15 amm Carbonate as CO3 ND 10 mg/L 1 UI 06/06/2023 19:10 amm SM 4500-H+B 06/07/2023 01:15 amm Bicarbonate as HCO3 160 10 mg/L 1 06/06/2023 19:10 amm SM 4500-H+B 06/07/2023 01:15 amm Sulfate 25.2 0.5 mg/L 5002 1 05/31/2023 12:23 ldm EPA 300.0 05/31/2023 23:28 ldm Chloride 5 1 mg/L 5002 1 b 05/31/2023 12:23 ldm EPA 300.0 05/31/2023 23:28 ldm Nitrate as NO3 31.1 0.4 mg/L 45 1 b 05/31/2023 12:23 ldm EPA 300.0 05/31/2023 23:28 ldm Nitrite as N ND 0.1 mg/L 1 1 Jb 05/31/2023 12:23 ldm EPA 300.0 05/31/2023 23:28 ldm Nitrate+Nitrite as N 7.0 0.1 mg/L 10 1 b 05/31/2023 12:23 ldm EPA 300.0 05/31/2023 23:28 ldm Fluoride 0.1 0.1 mg/L 2 1 05/31/2023 12:23 ldm EPA 300.0 05/31/2023 23:28 ldm Total Anions 3.8 --- meq/L 1 IbJ 06/06/2023 19:10 amm Calc. 06/07/2023 01:15 amm pH 7.8 --- units 1 05/30/2023 10:45 fgr SM 4500-H+B 05/30/2023 10:45 fgr Specific Conductance 373 1 umhos/cm 16002 1 06/06/2023 19:10 amm SM 4500-H+B 06/07/2023 01:15 amm Total Dissolved Solids 260 20 mg/L 10002 1 06/02/2023 12:00 ctl SM 2540 C 06/05/2023 11:30 ctl MBAs,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 05/31/2023 16:59 krh SM 5540 C 05/31/2023 17:03 krh Aggressiveness Index 11.9 1 1 05/30/2023 10:45 fgr Calc. 05/30/2023 10:45 fgr Langelier Index(20°C) 0.02 1 1 05/30/2023 10:45 fgr Calc. 05/30/2023 10:45 fgr Nitrate Nitrogen 7.0 0.1 mg/L 10 1 b 05/31/2023 12:23 ldm EPA 300.0 05/31/2023 23:28 ldm DQF Flags Definition: U Constituent results were non-detect. I The RPD for the laboratory duplicate exceeded laboratory criteria. b The Blank was positive for constituent but less than the PQL J Reported value is estimated;detected at a concentration below the RL and above the laboratory MDL. ND=Non-Detected, RL=Reporting Level, Dil.=Dilution MCL = Maximum Contamination Level. 2 - Secondary Standard. 3 -CDPH Notification Level.AL= Regulatory Action Level. Section: Sample Results Page 2 of 7 Page 2 of 7 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