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.O `AGRICULTURAL Analytical Chemists June 6, 2024 Lab No. : STK2437504-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 23, 2024 at 09:45 1868 East Hazelton Ave. Sampled By : Aaron Gooderham Stockton, CA 95205 Received On : May 23, 2024 at 14:30 Description : Wellhead Matrix : Drinking Water Project 16050 Liberty Road Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 49.6 2.5 mg/L 05/28/2024 11:00 ac 2340B 05/28/2024 12:58 ac Calcium 10 1 mg/L 1 05/28/2024 11:00 ac EPA 200.7 05/28/2024 12:58 ac Magnesium 6 1 mg/L 1 05/28/2024 11:00 ac EPA 200.7 05/28/2024 12:58 ac Potassium 3 1 mg/L 1 05/28/2024 11:00 ac EPA 200.7 05/28/2024 12:58 ac Sodium 11 1 mg/L 1 05/28/2024 11:00 ac EPA 200.7 05/28/2024 12:58 ac Total Cations 1.5 1 meq/L 05/28/2024 11:00 ac Calc. 05/28/2024 12:58 ac Boron ND 0.1 mg/L 1 U 05/28/2024 11:00 ac EPA 200.7 05/28/2024 12:58 ac Copper 200 10 ug/L 10002 1 05/28/2024 11:00 ac EPA 200.7 05/28/2024 12:58 ac Iron ND 30 ug/L 3002 1 U 05/28/2024 11:00 ac EPA 200.7 05/28/2024 12:58 ac Manganese ND 10 ug/L 502 1 U 05/28/2024 11:00 ac EPA 200.7 05/28/2024 12:58 ac Zinc 70 20 ug/L 5000 1 05/28/2024 11:00 ac EPA 200.7 05/28/2024 12:58 ac SAR 0.7 05/28/2024 11:00 ac Calc. 05/28/2024 12:58 ac Total Alkalinity(as CaCO3) 60 10 mg/L 1 05/25/2024 19:22 amm SM 4500-H+B 05/26/2024 08:26 amm Hydroxide as OH ND 10 mg/L 1 U 05/25/2024 19:22 amm SM 4500-H+B 05/26/2024 08:26 amm Carbonate as CO3 ND 10 mg/L 1 U 05/25/2024 19:22 amm SM 4500-H+B 05/26/2024 08:26 amm Bicarbonate as HCO3 70 10 mg/L 1 05/25/2024 19:22 amm SM 4500-H+B 05/26/2024 08:26 amm Sulfate 1.3 0.5 mg/L 5002 1 05/24/2024 15:27 1dm EPA 300.0 05/24/2024 20:11 krh Chloride 6 1 mg/L 5002 1 1 05/24/2024 15:27 ldm EPA 300.0 05/24/2024 20:11 krh Nitrate as NO3 10.0 0.4 mg/L 45 1 05/24/2024 15:27 ldm EPA 300.0 05/24/2024 20:11 krh Nitrite as N ND 0.1 mg/L 1 1 U 05/24/2024 15:27 ldm EPA 300.0 05/24/2024 20:11 krh Nitrate+Nitrite as N 2.2 0.1 mg/L 10 1 05/24/2024 15:27 ldm EPA 300.0 05/24/2024 20:11 krh Fluoride 0.2 0.1 mg/L 2 1 05/24/2024 15:27 ldm EPA 300.0 05/24/2024 20:11 krh Total Anions 1.5 10 meq/L 05/24/2024 15:27 ldm Calc. 05/24/2024 20:11 krh pH 7.92 --- units 1 T 05/23/2024 15:48 tag SM 4500-H+B 05/23/2024 15:48 tag Specific Conductance 161 1 umhos/cm 16002 1 05/25/2024 19:22 amm SM 4500-H+B 05/26/2024 08:26 amm Total Dissolved Solids 160 10 mg/L 10002 1 05/24/2024 17:00 ctl SM 2540 C 05/28/2024 11:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 05/24/2024 13:26 krh SM 5540 C 05/24/2024 13:39 krh Aggressiveness Index 11.1 10 --- 05/28/2024 11:00 ac Calc. 05/28/2024 12:58 ac Langelier Index(20°C) -0.7 10 --- 05/28/2024 11:00 ac Calc. 05/28/2024 12:58 ac Nitrate Nitrogen 2.2 0.1 mg/L 10 1 05/24/2024 15:27 ldm EPA 300.0 05/24/2024 20:11 krh Wet Chemistry pH 7.71 --- units 1 T 05/25/2024 19:22 amm SM 4500-H+B 05/26/2024 08:26 amm DQF Flags Definition: U Constituent results were non-detect. 1 The MS/MSD did not meet QC criteria. T Exceeded method/regulatory-specific holding time. 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 3 of 7 Page 3 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