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.O `AGRICULTURAL Analytical Chemists August 13, 2024 Lab No. : STK2450831-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :July 23, 2024 at 10:30 1868 East Hazelton Ave. Sampled By : Aaron Gooderham Stockton, CA 95205 Received On :July 23, 2024 at 11:30 Description Well Head Matrix : Drinking Water Project 1050 Versi Court-WP0043535 Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 83.6 2.5 mg/L 07/25/2024 10:00 ac 2340B 07/25/2024 12:34 ac Calcium 17 1 mg/L 1 1 07/25/2024 10:00 ac EPA 200.7 07/25/2024 12:34 ac Magnesium 10 1 mg/L 1 07/25/2024 10:00 ac EPA 200.7 07/25/2024 12:34 ac Potassium 4 1 mg/L 1 07/25/2024 10:00 ac EPA 200.7 07/25/2024 12:34 ac Sodium 12 1 mg/L 1 07/25/2024 10:00 ac EPA 200.7 07/25/2024 12:34 ac Total Cations 2.3 1 meq/L 07/25/2024 10:00 ac Calc. 07/25/2024 12:34 ac Boron ND 0.1 mg/L 1 U 07/25/2024 10:00 ac EPA 200.7 07/25/2024 12:34 ac Copper 30 10 ug/L 10002 1 07/25/2024 10:00 ac EPA 200.7 07/25/2024 12:34 ac Iron ND 30 ug/L 3002 1 U 07/25/2024 10:00 ac EPA 200.7 07/25/2024 12:34 ac Manganese ND 10 ug/L 502 1 U 07/25/2024 10:00 ac EPA 200.7 07/25/2024 12:34 ac Zinc ND 20 ug/L 5000 1 U 07/25/2024 10:00 ac EPA 200.7 07/25/2024 12:34 ac SAR 0.6 07/25/2024 10:00 ac Calc. 07/25/2024 12:34 ac Total Alkalinity(as CaCO3) 90 10 mg/L 1 07/28/2024 16:40 amm SM 4500-H+B 07/28/2024 22:45 amm Hydroxide as OH ND 10 mg/L 1 U 07/28/2024 16:40 amm SM 4500-H+B 07/28/2024 22:45 amm Carbonate as CO3 ND 10 mg/L 1 U 07/28/2024 16:40 amm SM 4500-H+B 07/28/2024 22:45 amm Bicarbonate as HCO3 110 10 mg/L 1 07/28/2024 16:40 amm SM 4500-H+B 07/28/2024 22:45 amm Sulfate 7.0 0.5 mg/L 5002 1 07/24/2024 16:00 1dm EPA 300.0 07/24/2024 22:11 ldm Chloride 7 1 mg/L 5002 1 07/24/2024 16:00 ldm EPA 300.0 07/24/2024 22:11 ldm Nitrate as NO3 14.0 0.4 mg/L 45 1 07/24/2024 16:00 ldm EPA 300.0 07/24/2024 22:11 ldm Nitrite as N ND 0.1 mg/L 1 1 U 07/24/2024 16:00 ldm EPA 300.0 07/24/2024 22:11 ldm Nitrate+Nitrite as N 3.2 0.1 mg/L 10 1 07/24/2024 16:00 ldm EPA 300.0 07/24/2024 22:11 ldm Fluoride 0.1 0.1 mg/L 2 1 07/24/2024 16:00 ldm EPA 300.0 07/24/2024 22:11 ldm Total Anions 2.4 10 meq/L 07/24/2024 16:00 ldm Calc. 07/24/2024 22:11 ldm pH 7.40 --- units 1 07/23/2024 10:30 ag SM 4500-H+B 07/23/2024 10:30 ag Specific Conductance 238 1 umhos/cm 16002 1 07/28/2024 16:40 amm SM 4500-H+B 07/28/2024 22:45 amm Total Dissolved Solids 170 20 mg/L 10002 1 07/25/2024 10:30 ctl SM 2540 C 07/26/2024 11:50 ctl MBAs,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 07/24/2024 15:09 krh SM 5540 C 07/24/2024 15:19 krh Aggressiveness Index 11.0 10 --- 07/25/2024 10:00 ac Calc. 07/25/2024 12:34 ac Langelier Index(20°C) -0.8 20 --- 07/25/2024 10:00 ac Calc. 07/25/2024 12:34 ac Nitrate Nitrogen 3.2 0.1 mg/L 10 1 07/24/2024 16:00 ldm EPA 300.0 07/24/2024 22:11 ldm DQF Flags Definition: 1 The MS/MSD did not meet QC criteria. 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 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