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.O `AGRICULTURAL Analytical Chemists March 7, 2024 Lab No. : STK2432129-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : February 12, 2024 at 11:35 1868 East Hazelton Ave. Sampled By : Naseem Ahmed Stockton, CA 95205 Received On : February 12, 2024 at 12:31 Description Well Head Matrix : Drinking Water Project 13114 DeVries Rd Lodi-WP0044401 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 588 mg/L 02/14/2024 10:00 ac 2340B 02/14/2024 11:21 ac Calcium 135 1 mg/L 1 02/14/2024 10:00 ac EPA 200.7 02/14/2024 11:21 ac Magnesium 61 1 mg/L 1 02/14/2024 10:00 ac EPA 200.7 02/14/2024 11:21 ac Potassium 10 1 mg/L 1 02/14/2024 10:00 ac EPA 200.7 02/14/2024 11:21 ac Sodium 87 1 mg/L 1 02/14/2024 10:00 ac EPA 200.7 02/14/2024 11:21 ac Total Cations 15.8 1 meq/L 02/14/2024 10:00 ac Calc. 02/14/2024 11:21 ac Boron ND 0.1 mg/L 1 U 02/14/2024 10:00 ac EPA 200.7 02/14/2024 11:21 ac Copper 200 10 ug/L 10002 1 02/14/2024 10:00 ac EPA 200.7 02/14/2024 11:21 ac Iron ND 30 ug/L 3002 1 U 02/14/2024 10:00 ac EPA 200.7 02/14/2024 11:21 ac Manganese ND 10 ug/L 502 1 U 02/14/2024 10:00 ac EPA 200.7 02/14/2024 11:21 ac Zinc 30 20 ug/L 5000 1 02/14/2024 10:00 ac EPA 200.7 02/14/2024 11:21 ac SAR 1.6 mg/L 02/14/2024 10:00 ac Calc. 02/14/2024 11:21 ac Total Alkalinity(as CaCO3) 460 10 mg/L 1 02/13/2024 15:16 amm SM 4500-H+B 02/13/2024 22:03 amm Hydroxide as OH ND 10 mg/L 1 U 02/13/2024 15:16 amm SM 4500-H+B 02/13/2024 22:03 amm Carbonate as CO3 ND 10 mg/L 1 U 02/13/2024 15:16 amm SM 4500-H+B 02/13/2024 22:03 amm Bicarbonate as HCO3 570 10 mg/L 1 02/13/2024 15:16 amm SM 4500-H+B 02/13/2024 22:03 amm Sulfate 45.5 0.5 mg/L 5002 1 02/16/2024 11:28 ldm EPA 300.0 02/17/2024 02:04 ldm Chloride 210 4* mg/L 5002 4 02/16/2024 11:28 ldm EPA 300.0 02/17/2024 15:36 ldm Nitrate as NO3 54.7 0.4 mg/L 45 1 02/13/2024 16:30 ilp SM 4500-NO3 F 02/13/2024 17:14 ilp Nitrite as N ND 0.2 mg/L 1 1 U 02/13/2024 16:30 ilp SM 4500-NO3 F 02/13/2024 17:12 ilp Nitrate+Nitrite as N 12.4 0.4 mg/L 10 1 02/13/2024 16:30 ilp SM 4500-NO3 F 02/13/2024 17:14 ilp Fluoride ND 0.1 mg/L 2 1 U 02/16/2024 11:28 ldm EPA 300.0 02/17/2024 02:04 ldm Total Anions 17.1 10 meq/L 02/16/2024 11:28 ldm Calc. 02/17/2024 15:36 ldm pH 7.20 --- units 1 02/12/2024 11:35 na SM 4500-H+B 02/12/2024 11:35 na Specific Conductance 1660 1 umhos/cm 16002 1 02/13/2024 15:16 amm SM 4500-H+B 02/13/2024 22:03 amm Total Dissolved Solids 990 20 mg/L 10002 1 02/13/2024 15:00 ctl SM 2540 C 02/14/2024 10:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 02/13/2024 14:37 krh SM 5540 C 02/13/2024 14:44 krh Aggressiveness Index 12.4 10 --- 02/14/2024 10:00 ac Calc. 02/14/2024 11:21 ac Langelier Index(20°C) 0.5 20 --- 02/14/2024 10:00 ac Calc. 02/14/2024 11:21 ac Nitrate Nitrogen 12.4 0.4 mg/L 10 1 02/13/2024 16:30 ilp SM 4500-NO3 F 02/13/2024 17:14 ilp DQF Flags Definition: U Constituent results were non-detect. ND=Non-Detected, RL=Reporting Level*RL adjusted for dilution, 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