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.O `AGRICULTURAL Analytical Chemists June 10, 2024 Lab No. : STK2437708-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 29, 2024 at 10:50 1868 East Hazelton Ave. Sampled By : Naseem Ahmed Stockton, CA 95205 Received On : May 29, 2024 at 11:24 Description :Well Head Matrix : Drinking Water Project : 12250 N Lower Sacramento Rd Lodi WP0043520 Sample Results - Inorganic • ,. General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 105 2.5 mg/L 05/30/2024 14:00 ac 2340B 05/30/2024 20:58 ac Calcium 24 1 mg/L 1 05/30/2024 14:00 ac EPA 200.7 05/30/2024 20:58 ac Magnesium 11 1 mg/L 1 1 05/30/2024 14:00 ac EPA 200.7 05/30/2024 20:58 ac Potassium 6 1 mg/L 1 05/30/2024 14:00 ac EPA 200.7 05/30/2024 20:58 ac Sodium 15 1 mg/L 1 05/30/2024 14:00 ac EPA 200.7 05/30/2024 20:58 ac Total Cations 2.9 1 meq/L 05/30/2024 14:00 ac Calc. 05/30/2024 20:58 ac Boron ND 0.1 mg/L 1 U 05/30/2024 14:00 ac EPA 200.7 05/31/2024 14:58 ac Copper ND 10 ug/L 10002 1 U 05/30/2024 14:00 ac EPA 200.7 05/30/2024 20:58 ac Iron ND 30 ug/L 3002 1 U 05/30/2024 14:00 ac EPA 200.7 05/31/2024 14:58 ac Manganese ND 10 ug/L 502 1 U 05/30/2024 14:00 ac EPA 200.7 05/30/2024 20:58 ac Zinc ND 20 ug/L 5000 1 U 05/30/2024 14:00 ac EPA 200.7 05/30/2024 20:58 ac SAR 0.6 05/30/2024 14:00 ac Calc. 05/30/2024 20:58 ac Total Alkalinity(as CaCO3) 120 10 mg/L 1 06/04/2024 19:22 amm SM 4500-H+B 06/05/2024 03:14 amm Hydroxide as OH ND 10 mg/L 1 U 06/04/2024 19:22 amm SM 4500-H+B 06/05/2024 03:14 amm Carbonate as CO3 ND 10 mg/L 1 U 06/04/2024 19:22 amm SM 4500-H+B 06/05/2024 03:14 amm Bicarbonate as HCO3 140 10 mg/L 1 06/04/2024 19:22 amm SM 4500-H+B 06/05/2024 03:14 amm Sulfate 8.4 0.5 mg/L 5002 1 05/30/2024 10:50 ldm EPA 300.0 05/31/2024 00:52 ldm Chloride 8 1 mg/L 5002 1 05/30/2024 10:50 ldm EPA 300.0 05/31/2024 00:52 ldm Nitrate as NO3 6.8 0.4 mg/L 45 1 05/30/2024 10:50 ldm EPA 300.0 05/31/2024 00:52 ldm Nitrite as N ND 0.1 mg/L 1 1 U 05/30/2024 10:50 ldm EPA 300.0 05/31/2024 00:52 ldm Nitrate+Nitrite as N 1.5 0.1 mg/L 10 1 05/30/2024 10:50 ldm EPA 300.0 05/31/2024 00:52 ldm Fluoride ND 0.1 mg/L 2 1 J 05/30/2024 10:50 ldm EPA 300.0 05/31/2024 00:52 ldm Total Anions 2.8 10 meq/L 05/30/2024 10:50 ldm Calc. 05/31/2024 00:52 ldm pH 7.70 --- units 1 05/29/2024 10:50 na SM 4500-H+B 05/29/2024 10:50 na Specific Conductance 284 1 umhos/cm 16002 1 06/04/2024 19:22 amm SM 4500-H+B 06/05/2024 03:14 amm Total Dissolved Solids 180 20 mg/L 10002 1 05/31/2024 12:00 ctl SM 2540 C 06/03/2024 10:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 05/30/2024 15:37 krh SM 5540 C 05/30/2024 15:48 krh Aggressiveness Index 11.6 10 --- 05/30/2024 14:00 ac Calc. 05/30/2024 20:58 ac Langelier Index(20°C) -0.3 20 --- 05/30/2024 14:00 ac Calc. 05/30/2024 20:58 ac Nitrate Nitrogen 1.5 0.1 mg/L 10 1 05/30/2024 10:50 ldm EPA 300.0 05/31/2024 00:52 ldm DQF Flags Definition: 1 The MS/MSD did not meet QC criteria. U Constituent results were non-detect. J Reported value is estimated;detected at a concentration below the RL and above the laboratory MDL. 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.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