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ENVIRONMENTAINW. . , Analytical Chemists February 14, 2023 Lab No. : STK2331480-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On : February 2, 2023 at 09:15 1868 East Hazelton Ave. Sampled By : Francisco Garcia Rui Stockton, CA 95205 Received On : February 2, 2023 at 10:12 Description :Wellhead Matrix : Drinking Water Project :25448 N.MagnoliaPl.Acampo- WP0040740 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 149 2.5 mg/L 1 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Calcium 30 1 mg/L 1 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Magnesium 18 1 mg/L 1 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Potassium 5 1 mg/L 1 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Sodium 13 1 mg/L 1 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Total Cations 3.7 --- meq/L 1 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Boron ND 0.1 mg/L 1 J 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Copper ND 10 ug/L 10002 1 J 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Iron ND 30 ug/L 3002 1 J 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Manganese ND 10 ug/L 502 1 U 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Zinc 20 20 ug/L 1 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac SAR 0.5 0.1 1 02/10/2023 12:00 ac EPA 200.7 02/10/2023 20:57 ac Total Alkalinity(as CaCO3) 140 10 mg/L 1 02/05/2023 15:54 amm SM 4500-H+B 02/06/2023 01:56 amm Hydroxide as OH ND 10 mg/L 1 U 02/05/2023 15:54 amm SM 4500-H+B 02/06/2023 01:56 amm Carbonate as CO3 ND 10 mg/L 1 U 02/05/2023 15:54 amm SM 4500-H+B 02/06/2023 01:56 amm Bicarbonate as HCO3 170 10 mg/L 1 02/05/2023 15:54 amm SM 4500-H+B 02/06/2023 01:56 amm Sulfate 12.1 0.5 mg/L 5002 1 02/03/2023 11:35 ldm EPA 300.0 02/04/2023 03:24 ldm Chloride 18 1 mg/L 5002 1 02/03/2023 11:35 ldm EPA 300.0 02/04/2023 03:24 ldm Nitrate as NO3 13.5 0.4 mg/L 45 1 02/03/2023 11:35 ldm EPA 300.0 02/04/2023 03:24 ldm Nitrite as N ND 0.1 mg/L 1 1 Jb 02/03/2023 11:35 ldm EPA 300.0 02/04/2023 03:24 ldm Nitrate+Nitrite as N 3.1 0.1 mg/L 10 1 02/03/2023 11:35 ldm EPA 300.0 02/04/2023 03:24 ldm Fluoride ND 0.1 mg/L 2 1 J 02/03/2023 11:35 ldm EPA 300.0 02/04/2023 03:24 ldm Total Anions 3.8 --- meq/L 1 Jb 02/05/2023 15:54 amm SM 4500-H+B 02/06/2023 01:56 amm pH 7.6 units 1 02/02/2023 09:15 fgr 02/02/2023 09:15 fgr Specific Conductance 366 1 umhos/cm 16002 1 02/05/2023 15:54 amm SM 4500-H+B 02/06/2023 01:56 amm Total Dissolved Solids 270 20 mg/L 10002 1 02/06/2023 13:48 ctl SM 2540 C 02/07/2023 12:27 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 02/03/2023 15:43 jba SM 5540 C 02/03/2023 15:51 jba Aggressiveness Index 11.6 1 1 02/02/2023 09:15 fgr 02/02/2023 09:15 fgr Langelier Index(20°C) -0.2 1 1 02/02/2023 09:15 fgr 02/02/2023 09:15 fgr Nitrate Nitrogen 3.1 0.1 mg/L 10 1 02/03/2023 11:35 ldm EPA 300.0 02/04/2023 03:24 ldm DQF Flags Definition: 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