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.O `AGRICULTURAL Analytical Chemists March 30, 2023 Lab No. : STK2332876-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On : March 6, 2023 at 11:45 1868 East Hazelton Ave. Sampled By : Aaron Gooderham Stockton, CA 95205 Received On : March 6, 2023 at 12:20 Description : Wellhead Matrix : Drinking Water Project 6154 Mobley Road Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 79.4 2.5 mg/L 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Calcium 17 1 mg/L 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Magnesium 9 1 mg/L 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Potassium 3 1 mg/L 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Sodium 15 1 mg/L 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Total Cations 2.3 --- meq/L 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Boron 0.1 0.1 mg/L 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Copper ND 10 ug/L 10002 1 U 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Iron 60 30 ug/L 3002 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Manganese 20 10 ug/L 502 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Zinc 20 20 ug/L 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac SAR 0.7 0.1 1 03/08/2023 07:00 ac EPA 200.7 03/08/2023 10:23 ac Total Alkalinity(as CaCO3) 70 10 mg/L 1 03/08/2023 18:36 amm SM 4500-H+B 03/08/2023 19:28 amm Hydroxide as OH ND 10 mg/L 1 U 03/08/2023 18:36 amm SM 4500-H+B 03/08/2023 19:28 amm Carbonate as CO3 ND 10 mg/L 1 U 03/08/2023 18:36 amm SM 4500-H+B 03/08/2023 19:28 amm Bicarbonate as HCO3 90 10 mg/L 1 03/08/2023 18:36 amm SM 4500-H+B 03/08/2023 19:28 amm Sulfate 7.0 0.5 mg/L 5002 1 03/22/2023 12:11 Idm EPA 300.0 03/22/2023 19:47 Idm Chloride 11 1 mg/L 5002 1 03/22/2023 12:11 Idm EPA 300.0 03/22/2023 19:47 Idm Nitrate as NO3 10.3 0.4 mg/L 45 1 03/07/2023 15:00 Ifs SM 4500-NO3 F 03/07/2023 18:45 Ifs Nitrite as N ND 0.2 mg/L 1 1 U 03/07/2023 15:00 Ifs SM 4500-NO3 F 03/07/2023 18:44 Ifs Nitrate+Nitrite as N 2.3 0.4 mg/L 10 1 03/07/2023 15:00 Ifs SM 4500-NO3 F 03/07/2023 18:45 Ifs Fluoride 0.1 0.1 mg/L 2 1 03/22/2023 12:11 Idm EPA 300.0 03/22/2023 19:47 Idm Total Anions 2.1 --- meq/L 1 03/08/2023 18:36 amm SM 4500-H+B 03/08/2023 19:28 amm pH 7.5 units 1 03/06/2023 11:45 ag 03/06/2023 11:45 ag Specific Conductance 212 1 umhos/cm 16002 1 03/08/2023 18:36 amm SM 4500-H+B 03/08/2023 19:28 amm Total Dissolved Solids 150 20 mg/L 10002 1 03/08/2023 11:00 ctl SM 2540 C 03/09/2023 12:00 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 03/07/2023 14:20 krh SM 5540 C 03/07/2023 14:35 krh Aggressiveness Index 11.0 1 1 03/08/2023 18:36 amm SM 4500-H+B 03/08/2023 19:28 amm Langelier Index(20°C) -0.8 1 1 03/08/2023 18:36 amm SM 4500-H+B 03/08/2023 19:28 amm Nitrate Nitrogen 2.3 0.4 mg/L 10 1 03/07/2023 15:00 Ifs SM 4500-NO3 F 03/07/2023 18:45 Ifs DQF Flags Definition: U Constituent results were non-detect. 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