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ENVIRONMENTAINW. . , Analytical Chemists February 7, 2024 Lab No. : STK2431495-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :January 31, 2024 at 11:20 1868 East Hazelton Ave. Sampled By : Naseem Ahmed Stockton, CA 95205 Received On :January 31, 2024 at 12:05 Description : Wellhead Matrix : Drinking Water Project 18948 N. Davis Rd., Lodi-WP0044074 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 108 mg/L 02/03/2024 07:00 ac 2340B 02/03/2024 12:09 ac Calcium 22 1 mg/L 1 02/03/2024 07:00 ac EPA 200.7 02/03/2024 12:09 ac Magnesium 13 1 mg/L 1 02/03/2024 07:00 ac EPA 200.7 02/03/2024 12:09 ac Potassium 3 1 mg/L 1 02/03/2024 07:00 ac EPA 200.7 02/03/2024 12:09 ac Sodium 33 1 mg/L 1 02/03/2024 07:00 ac EPA 200.7 02/03/2024 12:09 ac Total Cations 3.7 1 meq/L 02/03/2024 07:00 ac Calc. 02/03/2024 12:09 ac Boron ND 0.1 mg/L 1 U 02/03/2024 07:00 ac EPA 200.7 02/03/2024 12:09 ac Copper 110 10 ug/L 10002 1 02/03/2024 07:00 ac EPA 200.7 02/03/2024 12:09 ac Iron 50 30 ug/L 3002 1 02/03/2024 07:00 ac EPA 200.7 02/03/2024 12:09 ac Manganese 280 10 ug/L 502 1 02/03/2024 07:00 ac EPA 200.7 02/03/2024 12:09 ac Zinc 40 20 ug/L 5000 1 02/03/2024 07:00 ac EPA 200.7 02/03/2024 12:09 ac SAR 1.4 mg/L 02/03/2024 07:00 ac Calc. 02/03/2024 12:09 ac Total Alkalinity(as CaCO3) 130 10 mg/L 1 02/03/2024 19:15 amm SM 4500-H+B 02/04/2024 01:11 amm Hydroxide as OH ND 10 mg/L 1 U 02/03/2024 19:15 amm SM 4500-H+B 02/04/2024 01:11 amm Carbonate as CO3 ND 10 mg/L 1 U 02/03/2024 19:15 amm SM 4500-H+B 02/04/2024 01:11 amm Bicarbonate as HCO3 160 10 mg/L 1 02/03/2024 19:15 amm SM 4500-H+B 02/04/2024 01:11 amm Sulfate 22.8 0.5 mg/L 5002 1 h 02/01/2024 17:20 ldm Chloride 24 1 mg/L 5002 1 hl 02/01/2024 17:20 ldm Nitrate as NO3 ND 0.4 mg/L 45 1 Uh 02/01/2024 17:20 ldm Nitrite as N ND 0.1 mg/L 1 1 Uh 02/01/2024 17:20 ldm Nitrate+Nitrite as N ND 0.1 mg/L 10 1 Jh 02/01/2024 17:20 ldm Fluoride ND 0.1 mg/L 2 1 Jh 02/01/2024 17:20 ldm Total Anions 3.8 0.1 meq/L 02/01/2024 17:20 ldm Calc. pH 7.70 --- units 1 01/31/2024 11:20 na SM 4500-H+B 01/31/2024 11:20 na Specific Conductance 368 1 umhos/cm 16002 1 02/03/2024 19:15 amm SM 4500-H+B 02/04/2024 01:11 amm Total Dissolved Solids 250 20 mg/L 10002 1 02/02/2024 13:00 ctl SM 2540 C 02/05/2024 11:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 02/01/2024 15:19 krh SM 5540 C 02/01/2024 16:01 krh Aggressiveness Index 11.6 --- --- 02/03/2024 07:00 ac Calc. 02/03/2024 12:09 ac Langelier Index(20°C) -0.3 --- --- 02/03/2024 07:00 ac Calc. 02/03/2024 12:09 ac Nitrate Nitrogen ND 0.1 mg/L 10 1 Uh 02/01/2024 17:20 ldm DQF Flags Definition: U Constituent results were non-detect. h The MS/MSD did not meet QC criteria. 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. 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 8 Page 2 of 8 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