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.O `AGRICULTURAL Analytical Chemists July 9, 2024 Lab No. : STK2439579-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :June 27, 2024 at 10:30 1868 East Hazelton Ave. Sampled By : Aaron Gooderham Stockton, CA 95205 Received On :June 27, 2024 at 14:40 Description Wellhead Matrix : Drinking Water Project 23000 Frazier Road, WP0044788 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 127 2.5 mg/L 07/01/2024 14:00 ac 2340B 07/01/2024 19:41 ac Calcium 31 1 mg/L 1 07/01/2024 14:00 ac EPA 200.7 07/01/2024 19:41 ac Magnesium 12 1 mg/L 1 07/01/2024 14:00 ac EPA 200.7 07/01/2024 19:41 ac Potassium 4 1 mg/L 1 07/01/2024 14:00 ac EPA 200.7 07/01/2024 19:41 ac Sodium 10 1 mg/L 1 07/01/2024 14:00 ac EPA 200.7 07/01/2024 19:41 ac Total Cations 3.1 1 meq/L 07/01/2024 14:00 ac Calc. 07/01/2024 19:41 ac Boron ND 0.1 mg/L 1 U 07/01/2024 14:00 ac EPA 200.7 07/01/2024 19:41 ac Copper ND 10 ug/L 10002 1 U 07/01/2024 14:00 ac EPA 200.7 07/01/2024 19:41 ac Iron 30 30 ug/L 3002 1 07/01/2024 14:00 ac EPA 200.7 07/01/2024 19:41 ac Manganese ND 10 ug/L 502 1 U 07/01/2024 14:00 ac EPA 200.7 07/01/2024 19:41 ac Zinc 450 20 ug/L 5000 1 07/01/2024 14:00 ac EPA 200.7 07/01/2024 19:41 ac SAR 0.4 07/01/2024 14:00 ac Calc. 07/01/2024 19:41 ac Total Alkalinity(as CaCO3) 150 10 mg/L 1 07/01/2024 18:13 amm SM 4500-H+B 07/02/2024 03:02 amm Hydroxide as OH ND 10 mg/L 1 U 07/01/2024 18:13 amm SM 4500-H+B 07/02/2024 03:02 amm Carbonate as CO3 ND 10 mg/L 1 U 07/01/2024 18:13 amm SM 4500-H+B 07/02/2024 03:02 amm Bicarbonate as HCO3 180 10 mg/L 1 07/01/2024 18:13 amm SM 4500-H+B 07/02/2024 03:02 amm Sulfate 5.5 0.5 mg/L 5002 1 06/28/2024 17:00 ldm EPA 300.0 06/28/2024 20:35 ldm Chloride 5 1 mg/L 5002 1 06/28/2024 17:00 ldm EPA 300.0 06/28/2024 20:35 ldm Nitrate as NO3 4.9 0.4 mg/L 45 1 06/28/2024 17:00 ldm EPA 300.0 06/28/2024 20:35 ldm Nitrite as N ND 0.1 mg/L 1 1 U 06/28/2024 17:00 ldm EPA 300.0 06/28/2024 20:35 ldm Nitrate+Nitrite as N 1.1 0.1 mg/L 10 1 06/28/2024 17:00 ldm EPA 300.0 06/28/2024 20:35 ldm Fluoride ND 0.1 mg/L 2 1 U 06/28/2024 17:00 ldm EPA 300.0 06/28/2024 20:35 ldm Total Anions 3.3 10 meq/L 06/28/2024 17:00 ldm Calc. 06/28/2024 20:35 ldm pH 7.0 --- units 1 06/27/2024 10:30 ag SM 4500-H+B 06/27/2024 10:30 ag Specific Conductance 304 1 umhos/cm 16002 1 07/01/2024 18:13 amm SM 4500-H+B 07/02/2024 03:02 amm Total Dissolved Solids 220 20 mg/L 10002 1 07/01/2024 10:15 ctl SM 2540 C 07/02/2024 11:15 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 06/28/2024 17:29 krh SM 5540 C 06/28/2024 17:41 krh Aggressiveness Index 11.1 10 --- 07/01/2024 14:00 ac Calc. 07/01/2024 19:41 ac Langelier Index(20°C) -0.8 20 --- 07/01/2024 14:00 ac Calc. 07/01/2024 19:41 ac Nitrate Nitrogen 1.1 0.1 mg/L 10 1 06/28/2024 17:00 ldm EPA 300.0 06/28/2024 20:35 ldm 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.Undo 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