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.O `AGRICULTURAL Analytical Chemists July 30, 2024 Lab No. : STK2450141-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :July 10, 2024 at 08:55 1868 East Hazelton Ave. Sampled By : Aldara Salinas Stockton, CA 95205 Received On :July 10, 2024 at 09:32 Description :Well Head Matrix : Drinking Water Project :23443 S Hays Rd Manteca WP0044740 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 295 2.5 mg/L 07/12/2024 13:40 ac 2340B 07/12/2024 16:27 ac Calcium 87 1 mg/L 1 07/12/2024 13:40 ac EPA 200.7 07/12/2024 16:27 ac Magnesium 19 1 mg/L 1 1 07/12/2024 13:40 ac EPA 200.7 07/12/2024 16:27 ac Potassium 4 1 mg/L 1 07/12/2024 13:40 ac EPA 200.7 07/12/2024 16:27 ac Sodium 174 1 mg/L 1 07/12/2024 13:40 ac EPA 200.7 07/12/2024 16:27 ac Total Cations 13.6 1 meq/L 07/12/2024 13:40 ac Calc. 07/12/2024 16:27 ac Boron 0.2 0.1 mg/L 1 07/12/2024 13:40 ac EPA 200.7 07/12/2024 16:27 ac Copper 20 10 ug/L 10002 1 07/12/2024 13:40 ac EPA 200.7 07/12/2024 16:27 ac Iron 180 30 ug/L 3002 1 07/12/2024 13:40 ac EPA 200.7 07/12/2024 16:27 ac Manganese 290 10 ug/L 502 1 07/12/2024 13:40 ac EPA 200.7 07/12/2024 16:27 ac Zinc ND 20 ug/L 5000 1 U 07/12/2024 13:40 ac EPA 200.7 07/12/2024 16:27 ac SAR 4.4 07/12/2024 13:40 ac Calc. 07/12/2024 16:27 ac Total Alkalinity(as CaCO3) 120 10 mg/L 1 I 07/15/2024 17:21 amm SM 4500-H+B 07/15/2024 19:32 amm Hydroxide as OH ND 10 mg/L 1 U 07/15/2024 17:21 amm SM 4500-H+B 07/15/2024 19:32 amm Carbonate as CO3 ND 10 mg/L 1 U 07/15/2024 17:21 amm SM 4500-H+B 07/15/2024 19:32 amm Bicarbonate as HCO3 140 10 mg/L 1 I 07/15/2024 17:21 amm SM 4500-H+B 07/15/2024 19:32 amm Sulfate 6.5 0.5 mg/L 5002 1 07/11/2024 11:49 ldm EPA 300.0 07/11/2024 22:26 ldm Chloride 460 9* mg/L 5002 9 07/11/2024 11:49 ldm EPA 300.0 07/12/2024 05:22 ldm Nitrate as NO3 ND 0.4 mg/L 45 1 U 07/11/2024 11:49 ldm EPA 300.0 07/11/2024 22:26 ldm Nitrite as N ND 0.1 mg/L 1 1 U 07/11/2024 11:49 ldm EPA 300.0 07/11/2024 22:26 ldm Nitrate+Nitrite as N ND 0.1 mg/L 10 1 J 07/11/2024 11:49 ldm EPA 300.0 07/11/2024 22:26 ldm Fluoride ND 0.1 mg/L 2 1 U 07/11/2024 11:49 ldm EPA 300.0 07/11/2024 22:26 ldm Total Anions 15.4 10 meq/L 07/11/2024 11:49 ldm Calc. 07/12/2024 05:22 ldm pH 8.06 --- units 1 07/10/2024 08:55 as SM 4500-H+B 07/10/2024 08:55 as Specific Conductance 1740 1 umhos/cm 16002 1 07/15/2024 17:21 amm SM 4500-H+B 07/15/2024 19:32 amm Total Dissolved Solids 1160 20 mg/L 10002 1 07/12/2024 11:10 ctl SM 2540 C 07/15/2024 11:05 ctl MBAs,Calc.as LAS,MW 320 ND 0.1 mg/L 0.52 1 U 07/11/2024 16:13 krh SM 5540 C 07/11/2024 17:33 krh Aggressiveness Index 12.5 10 --- 07/12/2024 13:40 ac Calc. 07/12/2024 16:27 ac Langelier Index(20°C) 0.6 20 --- 07/12/2024 13:40 ac Calc. 07/12/2024 16:27 ac Nitrate Nitrogen ND 0.1 mg/L 10 1 U 07/11/2024 11:49 ldm EPA 300.0 07/11/2024 22:26 ldm DQF Flags Definition: 1 The MS/MSD did not meet QC criteria. U Constituent results were non-detect. I The RPD for the laboratory duplicate exceeded laboratory criteria. J Reported value is estimated;detected at a concentration below the RL and above the laboratory MDL. ND=Non-Detected, RL=Reporting Level*RL adjusted for dilution, 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.Undo Avenue 3442 Empresa Drive,Suite D 9411 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 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