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ENVIRONMENTAINW. . , Analytical Chemists May 5, 2023 Lab No. : STK2335136-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : April 25, 2023 at 10:00 1868 East Hazelton Ave. Sampled By : Francisco Garcia Rui Stockton, CA 95205 Received On : April 25, 2023 at 13:03 Description :Wellhead Matrix : Drinking Water Project : 13035 Escalon Bellota Rd.,Escalon- WP0043254 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 195 2.5 mg/L 1 1 04/27/2023 12:00 ac 2340B 04/27/2023 14:58 ac Calcium 42 1 mg/L 1 04/27/2023 12:00 ac EPA 200.7 04/27/2023 14:58 ac Magnesium 22 1 mg/L 1 1 04/27/2023 12:00 ac EPA 200.7 04/27/2023 14:58 ac Potassium 4 1 mg/L 1 04/27/2023 12:00 ac EPA 200.7 04/27/2023 14:58 ac Sodium 33 1 mg/L 1 04/27/2023 12:00 ac EPA 200.7 04/27/2023 14:58 ac Total Cations 5.4 --- meq/L 1 1 04/27/2023 12:00 ac Calc. 04/27/2023 14:58 ac Boron ND 0.1 mg/L 1 J 04/27/2023 12:00 ac EPA 200.7 04/27/2023 14:58 ac Copper ND 10 ug/L 10002 1 U 04/27/2023 12:00 ac EPA 200.7 04/27/2023 14:58 ac Iron ND 30 ug/L 3002 1 U 04/27/2023 12:00 ac EPA 200.7 04/27/2023 14:58 ac Manganese ND 10 ug/L 502 1 J 04/27/2023 12:00 ac EPA 200.7 04/27/2023 14:58 ac Zinc ND 20 ug/L 1 J 04/27/2023 12:00 ac EPA 200.7 04/27/2023 14:58 ac SAR 1.0 0.1 1 1 04/27/2023 12:00 ac Calc. 04/27/2023 14:58 ac Total Alkalinity(as CaCO3) 230 10 mg/L 1 05/02/2023 13:20 amm SM 4500-H+B 05/03/2023 01:19 amm Hydroxide as OH ND 10 mg/L 1 U 05/02/2023 13:20 amm SM 4500-H+B 05/03/2023 01:19 amm Carbonate as CO3 ND 10 mg/L 1 U 05/02/2023 13:20 amm SM 4500-H+B 05/03/2023 01:19 amm Bicarbonate as HCO3 280 10 mg/L 1 05/02/2023 13:20 amm SM 4500-H+B 05/03/2023 01:19 amm Sulfate 20.7 0.5 mg/L 5002 1 04/26/2023 15:32 ldm EPA 300.0 04/27/2023 09:18 ldm Chloride 12 1 mg/L 5002 1 b 04/26/2023 15:32 ldm EPA 300.0 04/27/2023 09:18 ldm Nitrate as NO3 9.5 0.4 mg/L 45 1 04/26/2023 15:32 ldm EPA 300.0 04/27/2023 09:18 ldm Nitrite as N ND 0.1 mg/L 1 1 Jb 04/26/2023 15:32 ldm EPA 300.0 04/27/2023 09:18 ldm Nitrate+Nitrite as N 2.2 0.1 mg/L 10 1 04/26/2023 15:32 ldm EPA 300.0 04/27/2023 09:18 ldm Fluoride 0.1 0.1 mg/L 2 1 04/26/2023 15:32 ldm EPA 300.0 04/27/2023 09:18 ldm Total Anions 5.5 --- meq/L 1 bJ 05/02/2023 13:20 amm Calc. 05/03/2023 01:19 amm pH 7.2 units 1 04/25/2023 10:00 fgr SM 4500-H+B 04/25/2023 10:00 fgr Specific Conductance 495 1 umhos/cm 16002 1 05/02/2023 13:20 amm SM 4500-H+B 05/03/2023 01:19 amm Total Dissolved Solids 350 20 mg/L 10002 1 04/27/2023 13:30 ctl SM 2540 C 04/28/2023 11:30 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 04/26/2023 17:21 krh SM 5540 C 04/26/2023 17:30 krh Aggressiveness Index 11.6 1 1 04/25/2023 10:00 fgr Calc. 04/25/2023 10:00 fgr Langelier Index(20°C) -0.3 1 1 04/25/2023 10:00 fgr Calc. 04/25/2023 10:00 fgr Nitrate Nitrogen 2.2 0.1 mg/L 10 1 04/26/2023 15:32 ldm EPA 300.0 04/27/2023 09:18 ldm DQF Flags Definition: 1 The MS/MSD did not meet QC criteria. J Reported value is estimated;detected at a concentration below the RL and above the laboratory MDL. U Constituent results were non-detect. b The Blank was positive for constituent but less than the PQL 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.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