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.O `AGRICULTURAL Analytical Chemists July 9, 2024 Lab No. : STK2439659-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :July 1, 2024 at 10:05 1868 East Hazelton Ave. Sampled By : Rena LeRoy Stockton, CA 95205 Received On :July 1, 2024 at 11:32 Description :Wellhead Matrix : Drinking Water Project : 10416 E. Southland Rd., Manteca, CA 95336-WP0043162 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 266 2.5 mg/L 1 07/03/2024 13:00 ac 2340B 07/03/2024 16:16 ac Calcium 72 1 mg/L 1 07/03/2024 13:00 ac EPA 200.7 07/03/2024 16:16 ac Magnesium 21 1 mg/L 1 07/03/2024 13:00 ac EPA 200.7 07/03/2024 16:16 ac Potassium 6 1 mg/L 1 07/03/2024 13:00 ac EPA 200.7 07/03/2024 16:16 ac Sodium 31 1 mg/L 1 07/03/2024 13:00 ac EPA 200.7 07/03/2024 16:16 ac Total Cations 6.8 --- meq/L 1 07/03/2024 13:00 ac Calc. 07/03/2024 16:16 ac Boron 0.1 0.1 mg/L 1 07/03/2024 13:00 ac EPA 200.7 07/03/2024 16:16 ac Copper 20 10 ug/L 10002 1 07/03/2024 13:00 ac EPA 200.7 07/03/2024 16:16 ac Iron ND 30 ug/L 3002 1 U 07/03/2024 13:00 ac EPA 200.7 07/03/2024 16:16 ac Manganese ND 10 ug/L 502 1 U 07/03/2024 13:00 ac EPA 200.7 07/03/2024 16:16 ac Zinc ND 20 ug/L 5000 1 U 07/03/2024 13:00 ac EPA 200.7 07/03/2024 16:16 ac SAR 0.8 0.1 1 07/03/2024 13:00 ac Calc. 07/03/2024 16:16 ac Total Alkalinity(as CaCO3) 220 10 mg/L 1 07/03/2024 14:30 amm SM 4500-H+B 07/03/2024 19:59 amm Hydroxide as OH ND 10 mg/L 1 U 07/03/2024 14:30 amm SM 4500-H+B 07/03/2024 19:59 amm Carbonate as CO3 ND 10 mg/L 1 U 07/03/2024 14:30 amm SM 4500-H+B 07/03/2024 19:59 amm Bicarbonate as HCO3 270 10 mg/L 1 07/03/2024 14:30 amm SM 4500-H+B 07/03/2024 19:59 amm Sulfate 43.7 0.5 mg/L 5002 1 07/02/2024 18:08 ldm EPA 300.0 07/03/2024 01:06 ldm Chloride 19 1 mg/L 5002 1 07/02/2024 18:08 ldm EPA 300.0 07/03/2024 01:06 ldm Nitrate as NO3 68.3 0.4 mg/L 45 1 1 07/02/2024 18:08 ldm EPA 300.0 07/03/2024 01:06 ldm Nitrite as N ND 0.1 mg/L 1 1 U 07/02/2024 18:08 ldm EPA 300.0 07/03/2024 01:06 ldm Nitrate+Nitrite as N 15 0.1 mg/L 10 1 1 07/02/2024 18:08 ldm EPA 300.0 07/03/2024 01:06 ldm Fluoride ND 0.1 mg/L 2 1 U 07/02/2024 18:08 ldm EPA 300.0 07/03/2024 01:06 ldm Total Anions 7.0 --- meq/L 1 1 07/03/2024 14:30 amm Calc. 07/03/2024 19:59 amm pH 7.23 --- units 1 07/01/2024 10:05 rl SM 4500-H+B 07/01/2024 10:05 rl Specific Conductance 682 1 umhos/cm 16002 1 07/03/2024 14:30 amm SM 4500-H+B 07/03/2024 19:59 amm Total Dissolved Solids 440 20 mg/L 10002 1 07/03/2024 10:15 ctl SM 2540 C 07/05/2024 11:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 07/02/2024 13:43 krh SM 5540 C 07/02/2024 13:56 krh Aggressiveness Index 11.8 1 1 07/01/2024 10:05 rl Calc. 07/01/2024 10:05 rl Langelier Index(20°C) -0.03 1 1 07/01/2024 10:05 rl Calc. 07/01/2024 10:05 rl Nitrate Nitrogen 15.4 0.1 mg/L 10 1 1 07/02/2024 18:08 ldm EPA 300.0 07/03/2024 01:06 ldm DQF Flags Definition: U Constituent results were non-detect. 1 The MS/MSD did not meet QC criteria. 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 8 Page 2 of 8 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