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.O `AGRICULTURAL Analytical Chemists March 27, 2023 Lab No. : STK2332955-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On : March 7, 2023 at 11:25 1868 East Hazelton Ave. Sampled By : Naseem Ahmed Stockton, CA 95205 Received On : March 7, 2023 at 12:09 Description : Pressure Tank Spigot Matrix : Drinking Water Project 18853 N. Hwy 99 Frntg-WP0042885 Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 43.0 2.5 mg/L 1 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Calcium 9 1 mg/L 1 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Magnesium 5 1 mg/L 1 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Potassium 3 1 mg/L 1 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Sodium 11 1 mg/L 1 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Total Cations 1.4 --- meq/L 1 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Boron ND 0.1 mg/L 1 U 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Copper 10 10 ug/L 10002 1 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Iron ND 30 ug/L 3002 1 J 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Manganese ND 10 ug/L 502 1 J 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Zinc 1750 20 ug/L 1 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac SAR 0.7 0.1 1 03/09/2023 11:00 ac EPA 200.7 03/09/2023 12:53 ac Total Alkalinity(as CaCO3) 50 10 mg/L 1 03/08/2023 18:36 amm SM 4500-H+B 03/09/2023 01:53 amm Hydroxide as OH ND 10 mg/L 1 UI 03/08/2023 18:36 amm SM 4500-H+B 03/09/2023 01:53 amm Carbonate as CO3 ND 10 mg/L 1 UI 03/08/2023 18:36 amm SM 4500-H+B 03/09/2023 01:53 amm Bicarbonate as HCO3 70 10 mg/L 1 03/08/2023 18:36 amm SM 4500-H+B 03/09/2023 01:53 amm Sulfate 1.9 0.5 mg/L 5002 1 03/08/2023 13:25 ldm EPA 300.0 03/09/2023 01:03 ldm Chloride 2 1 mg/L 5002 1 1 03/08/2023 13:25 ldm EPA 300.0 03/09/2023 01:03 ldm Nitrate as NO3 ND 0.4 mg/L 45 1 U 03/08/2023 13:25 ldm EPA 300.0 03/09/2023 01:03 ldm Nitrite as N ND 0.1 mg/L 1 1 U 03/08/2023 13:25 ldm EPA 300.0 03/09/2023 01:03 ldm Nitrate+Nitrite as N ND 0.1 mg/L 10 1 U 03/08/2023 13:25 ldm EPA 300.0 03/09/2023 01:03 ldm Fluoride 0.1 0.1 mg/L 2 1 03/08/2023 13:25 ldm EPA 300.0 03/09/2023 01:03 ldm Total Anions 1.2 --- meq/L 1 Il 03/08/2023 18:36 amm SM 4500-H+B 03/09/2023 01:53 amm pH 7.2 units 1 03/07/2023 11:25 na 03/07/2023 11:25 na Specific Conductance 121 1 umhos/cm 16002 1 03/08/2023 18:36 amm SM 4500-H+B 03/09/2023 01:53 amm Total Dissolved Solids 140 20 mg/L 10002 1 03/09/2023 11:30 ctl SM 2540 C 03/10/2023 13:00 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 03/08/2023 17:52 krh SM 5540 C 03/08/2023 18:00 krh Aggressiveness Index 10.3 1 1 03/07/2023 11:25 na 03/07/2023 11:25 na Langelier Index(20°C) -1.5 1 1 03/07/2023 11:25 na 03/07/2023 11:25 na Nitrate Nitrogen ND 0.1 mg/L 10 1 U 03/08/2023 13:25 ldm EPA 300.0 03/09/2023 01:03 ldm DQF Flags Definition: U Constituent results were non-detect. J Reported value is estimated;detected at a concentration below the RL and above the laboratory MDL. I The RPD for the laboratory duplicate exceeded laboratory criteria. 1 The MS/MSD did not meet QC criteria. 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.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