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.O `AGRICULTURAL Analytical Chemists June 12, 2024 Lab No. : STK2437841-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 31, 2024 at 10:23 1868 East Hazelton Ave. Sampled By : Naseem Ahmed Stockton, CA 95205 Received On : May 31, 2024 at 12:29 Description :Wellhead Matrix : Drinking Water Project :24790 Brovelli Woods Lane, Acampo- WP0044953 Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 58.7 2.5 mg/L 06/04/2024 11:00 ac 2340B 06/04/2024 20:34 ac Calcium 12 1 mg/L 1 06/04/2024 11:00 ac EPA 200.7 06/04/2024 20:34 ac Magnesium 7 1 mg/L 1 06/04/2024 11:00 ac EPA 200.7 06/04/2024 20:34 ac Potassium 2 1 mg/L 1 06/04/2024 11:00 ac EPA 200.7 06/04/2024 20:34 ac Sodium 22 1 mg/L 1 06/04/2024 11:00 ac EPA 200.7 06/04/2024 20:34 ac Total Cations 2.2 1 meq/L 06/04/2024 11:00 ac Calc. 06/04/2024 20:34 ac Boron 0.1 0.1 mg/L 1 06/04/2024 11:00 ac EPA 200.7 06/04/2024 20:34 ac Copper 140 10 ug/L 1000, 1 06/04/2024 11:00 ac EPA 200.7 06/04/2024 20:34 ac Iron 290 30 ug/L 300, 1 06/04/2024 11:00 ac EPA 200.7 06/04/2024 20:34 ac Manganese 180 10 ug/L 50, 1 06/04/2024 11:00 ac EPA 200.7 06/04/2024 20:34 ac Zinc ND 20 ug/L 5000 1 U 06/04/2024 11:00 ac EPA 200.7 06/04/2024 20:34 ac SAR 1.2 06/04/2024 11:00 ac Calc. 06/04/2024 20:34 ac Total Alkalinity(as CaCO3) 100 10 mg/L 1 06/07/2024 18:16 amm SM 4500-11+13 06/08/2024 00:50 amm Hydroxide as OH ND 10 mg/L 1 U 06/07/2024 18:16 amm SM 4500-11+13 06/08/2024 00:50 amm Carbonate as CO3 ND 10 mg/L 1 U 06/07/2024 18:16 amm SM 4500-11+13 06/08/2024 00:50 amm Bicarbonate as HCO3 120 10 mg/L 1 06/07/2024 18:16 amm SM 4500-11+13 06/08/2024 00:50 amm Sulfate 2.9 0.5 mg/L 500, 1 06/05/2024 11:00 ldm EPA 300.0 06/06/2024 04:20 Min Chloride 6 1 mg/L 500, 1 1 06/05/2024 11:00 ldm EPA 300.0 06/06/2024 04:20 Min Nitrate as NO3 0.9 0.4 mg/L 45 1 J 06/07/2024 12:55 Up SM 4500-NO3 F 06/07/2024 13:36 ilp Nitrite as N ND 0.1 mg/L 1 1 U 06/01/2024 16:01 amm SM 4500-NO2 B 06/01/2024 16:50 amm Nitrate+Nitrite as N ND 0.4 mg/L 10 1 U 06/07/2024 12:55 Up SM 4500-NO3 F 06/07/2024 13:36 ilp Fluoride ND 0.1 mg/L 2 1 U 06/05/2024 11:00 ldm EPA 300.0 06/06/2024 04:20 ldm Total Anions 2.2 10 meq/L 06/05/2024 11:00 ldm Calc. 06/06/2024 04:20 Min pH 7.60 --- units 1 05/31/2024 10:23 na SM 4500-11+13 05/31/2024 10:23 na Specific Conductance 215 1 umhos/cm 16002 1 06/07/2024 18:16 amm SM 4500-H+B 06/08/2024 00:50 amm Total Dissolved Solids 180 20 mg/L 10001 1 06/04/2024 15:11 ctl SM 2540 C 06/05/2024 11:15 ctl MBAs,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 06/01/2024 18:26 amm SM 5540 C 06/01/2024 18:37 amm Aggressiveness Index 11.1 10 --- 06/04/2024 11:00 ac Calc. 06/04/2024 20:34 ac Langelier Index(20°C) -0.7 20 --- 06/04/2024 11:00 ac Calc. 06/04/2024 20:34 ac Nitrate Nitrogen ND 0.4 mg/L 10 1 U 06/07/2024 12:55 Up SM 4500-NO3 F 06/07/2024 13:36 ilp DQF Flags Definition: U Constituent results were non-detect. 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