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•O Analytical Chemists May 6, 2024 Lab No. : STK2435740-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : April 24, 2024 at 13:39 1868 East Hazelton Ave. Sampled By : Rena Leroy Stockton, CA 95205 Received On : April 24, 2024 at 14:08 Description Wellhead Matrix : Drinking Water Project 16728 Elsholz Rd., Ripon, CA 95366 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 77.8 2.5 mg/L 04/30/2024 08:00 ac 2340B 04/30/2024 08:33 ac Calcium 18 1 mg/L 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 08:33 ac Magnesium 8 1 mg/L 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 08:33 ac Potassium 4 1 mg/L 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 08:33 ac Sodium 17 1 mg/L 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 08:33 ac Total Cations 2.4 1 meq/L 04/30/2024 08:00 ac Calc. 04/30/2024 08:33 ac Boron 0.1 0.1 mg/L 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 08:33 ac Copper 40 10 ug/L 10002 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 08:33 ac Iron ND 30 ug/L 3002 1 U 04/30/2024 08:00 ac EPA 200.7 04/30/2024 08:33 ac Manganese ND 10 ug/L 502 1 U 04/30/2024 08:00 ac EPA 200.7 04/30/2024 08:33 ac Zinc 210 20 ug/L 5000 1 04/30/2024 08:00 ac EPA 200.7 04/30/2024 08:33 ac SAR 0.8 04/30/2024 08:00 ac Calc. 04/30/2024 08:33 ac Total Alkalinity(as CaCO3) 70 10 mg/L 1 05/05/2024 15:12 amm SM 4500-1-1+13 05/05/2024 18:37 amm Hydroxide as OH ND 10 mg/L 1 U 05/05/2024 15:12 amm SM 4500-1-1+13 05/05/2024 18:37 amm Carbonate as CO3 ND 10 mg/L 1 U 05/05/2024 15:12 amm SM 4500-H+B 05/05/2024 18:37 amm Bicarbonate as HCO3 90 10 mg/L 1 05/05/2024 15:12 amm SM 4500-H+B 05/05/2024 18:37 amm Sulfate 8.7 0.5 mg/L 5002 1 04/25/2024 17:48 ldm EPA 300.0 04/26/2024 05:49 ldm Chloride 19 1 mg/L 5002 1 04/25/2024 17:48 ldm EPA 300.0 04/26/2024 05:49 ldm Nitrate as NO3 10.3 0.4 mg/L 45 1 04/25/2024 17:48 ldm EPA 300.0 04/26/2024 05:49 ldm Nitrite as N ND 0.1 mg/L 1 1 U 04/25/2024 17:48 ldm EPA 300.0 04/26/2024 05:49 ldm Nitrate+Nitrite as N 2.3 0.1 mg/L 10 1 04/25/2024 17:48 ldm EPA 300.0 04/26/2024 05:49 ldm Fluoride 0.2 0.1 mg/L 2 1 04/25/2024 17:48 ldm EPA 300.0 04/26/2024 05:49 ldm Total Anions 2.4 10 meq/L 04/25/2024 17:48 ldm Calc. 04/26/2024 05:49 ldm pH 7.42 --- units 1 04/24/2024 13:39 rl SM 4500-H+B 04/24/2024 13:39 rl Specific Conductance 249 1 umhos/cm 16002 1 05/05/2024 15:12 amm SM 4500-H+B 05/05/2024 18:37 amm Total Dissolved Solids 200 20 mg/L 10002 1 04/26/2024 13:45 ctl SM 2540 C 04/29/2024 11:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 04/25/2024 14:36 krh SM 5540 C 04/25/2024 14:45 krh Aggressiveness Index 10.9 10 --- 04/30/2024 08:00 ac Calc. 04/30/2024 08:33 ac Langelier Index(20°C) -0.9 20 --- 04/30/2024 08:00 ac Calc. 04/30/2024 08:33 ac Nitrate Nitrogen 2.3 0.1 mg/L 10 1 04/25/2024 17:48 ldm EPA 300.0 04/26/2024 05:49 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