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•O Analytical Chemists May 6, 2024 Lab No. : STK2435795-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : April 25, 2024 at 09:50 1868 East Hazelton Ave. Sampled By : Rena LaRay Stockton, CA 95205 Received On : April 25, 2024 at 11:12 Description Well Head Matrix : Drinking Water Project 15809 Victory Rd Oakdale Ca 95361 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 95.2 2.5 mg/L 04/30/2024 08:00 ac 2340B 04/30/2024 10:11 ac Calcium 20 1 mg/L 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 10:11 ac Magnesium 11 1 mg/L 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 10:11 ac Potassium 3 1 mg/L 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 10:11 ac Sodium 18 1 mg/L 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 10:11 ac Total Cations 2.8 1 meq/L 04/30/2024 08:00 ac Calc. 04/30/2024 10:11 ac Boron ND 0.1 mg/L 1 U 04/30/2024 08:00 ac EPA 200.7 04/30/2024 10:11 ac Copper ND 10 ug/L 10002 1 U 04/30/2024 08:00 ac EPA 200.7 04/30/2024 10:11 ac Iron ND 30 ug/L 3002 1 U 04/30/2024 08:00 ac EPA 200.7 04/30/2024 10:11 ac Manganese ND 10 ug/L 502 1 U 04/30/2024 08:00 ac EPA 200.7 04/30/2024 10:11 ac Zinc ND 20 ug/L 5000 1 U 04/30/2024 08:00 ac EPA 200.7 04/30/2024 10:11 ac SAR 0.8 04/30/2024 08:00 ac Calc. 04/30/2024 10:11 ac Total Alkalinity(as CaCO3) 100 10 mg/L 1 05/01/2024 14:15 amm SM 4500-1-1+13 05/01/2024 22:04 amm Hydroxide as OH ND 10 mg/L 1 U 05/01/2024 14:15 amm SM 4500-1-1+13 05/01/2024 22:04 amm Carbonate as CO3 ND 10 mg/L 1 U 05/01/2024 14:15 amm SM 4500-H+B 05/01/2024 22:04 amm Bicarbonate as HCO3 120 10 mg/L 1 05/01/2024 14:15 amm SM 4500-H+B 05/01/2024 22:04 amm Sulfate 9.8 0.5 mg/L 5002 1 04/26/2024 14:34 ldm EPA 300.0 04/26/2024 18:45 ldm Chloride 11 1 mg/L 5002 1 04/26/2024 14:34 ldm EPA 300.0 04/26/2024 18:45 ldm Nitrate as NO3 14.3 0.4 mg/L 45 1 04/26/2024 14:34 ldm EPA 300.0 04/26/2024 18:45 ldm Nitrite as N ND 0.1 mg/L 1 1 U 04/26/2024 14:34 ldm EPA 300.0 04/26/2024 18:45 ldm Nitrate+Nitrite as N 3.2 0.1 mg/L 10 1 04/26/2024 14:34 ldm EPA 300.0 04/26/2024 18:45 ldm Fluoride 0.2 0.1 mg/L 2 1 04/26/2024 14:34 ldm EPA 300.0 04/26/2024 18:45 ldm Total Anions 2.7 10 meq/L 04/26/2024 14:34 ldm Calc. 04/26/2024 18:45 ldm pH 7.50 --- units 1 04/25/2024 09:50 rl SM 4500-H+B 04/25/2024 09:50 rl Specific Conductance 269 1 umhos/cm 16002 1 05/01/2024 14:15 amm SM 4500-H+B 05/01/2024 22:04 amm Total Dissolved Solids 200 20 mg/L 10002 1 04/29/2024 16:00 ctl SM 2540 C 04/30/2024 11:33 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 04/26/2024 14:24 krh SM 5540 C 04/26/2024 14:38 krh Aggressiveness Index 11.2 10 --- 04/30/2024 08:00 ac Calc. 04/30/2024 10:11 ac Langelier Index(20°C) -0.6 20 --- 04/30/2024 08:00 ac Calc. 04/30/2024 10:11 ac Nitrate Nitrogen 3.2 0.1 mg/L 10 1 04/26/2024 14:34 ldm EPA 300.0 04/26/2024 18:45 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.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