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.O `AGRICULTURAL Analytical Chemists May 29, 2024 Lab No. : STK2436426-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 7, 2024 at 09:32 1868 East Hazelton Ave. Sampled By : Rena LeRoy Stockton, CA 95205 Received On : May 7, 2024 at 10:38 Description :Well Head Matrix : Drinking Water Project :23861 S Austi n Ripon Ca WP0043751 Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 104 2.5 mg/L 1 05/09/2024 13:02 ac 2340B 05/09/2024 14:42 ac Calcium 30 1 mg/L 1 05/09/2024 13:02 ac EPA 200.7 05/09/2024 14:42 ac Magnesium 7 1 mg/L 1 05/09/2024 13:02 ac EPA 200.7 05/09/2024 14:42 ac Potassium 4 1 mg/L 1 05/09/2024 13:02 ac EPA 200.7 05/09/2024 14:42 ac Sodium 79 1 mg/L 1 05/09/2024 13:02 ac EPA 200.7 05/09/2024 14:42 ac Total Cations 5.6 --- meq/L 1 05/09/2024 13:02 ac Calc. 05/09/2024 14:42 ac Boron 0.17 0.01 mg/L 1 05/09/2024 13:03 ac EPA 200.8 05/09/2024 16:00 ac Copper 3 1 ug/L 10002 1 05/09/2024 13:03 ac EPA 200.8 05/10/2024 11:14 ac Iron ND 30 ug/L 3002 1 U 05/09/2024 13:02 ac EPA 200.7 05/09/2024 14:42 ac Manganese 42.4 0.5 ug/L 502 1 05/09/2024 13:03 ac EPA 200.8 05/10/2024 11:14 ac Zinc 10 10 ug/L 5000 1 05/09/2024 13:03 ac EPA 200.8 05/10/2024 11:14 ac SAR 3.4 0.1 1 05/09/2024 13:02 ac Calc. 05/09/2024 14:42 ac Total Alkalinity(as CaCO3) 100 10 mg/L 1 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:40 amm Hydroxide as OH ND 10 mg/L 1 U 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:40 amm Carbonate as CO3 ND 10 mg/L 1 U 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:40 amm Bicarbonate as HCO3 120 10 mg/L 1 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:40 amm Sulfate 13.5 0.5 mg/L 500' 1 05/08/2024 10:41 1dm EPA 300.0 05/09/2024 00:33 ldm Chloride 140 3* mg/L 500' 3 1 05/08/2024 10:41 ldm EPA 300.0 05/10/2024 02:17 ldm Nitrate as NO3 8.2 0.4 mg/L 45 1 05/08/2024 10:41 ldm EPA 300.0 05/09/2024 00:33 ldm Nitrite as N ND 0.1 mg/L 1 1 U 05/08/2024 10:41 ldm EPA 300.0 05/09/2024 00:33 ldm Nitrate+Nitrite as N 1.9 0.1 mg/L 10 1 05/08/2024 10:41 ldm EPA 300.0 05/09/2024 00:33 ldm Fluoride ND 0.1 mg/L 2 1 U 05/08/2024 10:41 ldm EPA 300.0 05/09/2024 00:33 ldm Total Anions 6.3 --- meq/L 1 05/08/2024 10:41 ldm Calc. 05/10/2024 02:17 ldm pH 7.58 --- units 1 05/07/2024 09:32 rl SM 4500-H+B 05/07/2024 09:32 rl Specific Conductance 699 1 umhos/cm 1600' 1 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:40 amm Total Dissolved Solids 410 20 mg/L 1000' 1 05/09/2024 10:40 ctl SM 2540 C 05/10/2024 11:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.5' 1 U 05/08/2024 16:06 krh SM 5540 C 05/08/2024 16:13 krh Aggressiveness Index 11.5 1 1 05/07/2024 09:32 rl Calc. 05/07/2024 09:32 rl Langelier Index(20°C) -0.4 1 1 05/07/2024 09:32 rl Calc. 05/07/2024 09:32 rl Nitrate Nitrogen 1.9 0.1 mg/L 10 1 05/08/2024 10:41 ldm EPA 300.0 05/09/2024 00:33 ldm Metals,Total Arsenic 14 1 ug/L 10 1 h 05/09/2024 13:03 ac EPA 200.8 05/10/2024 11:14 ac DQF Flags Definition: U Constituent results were non-detect. 1 The MS/MSD did not meet QC criteria. h The MS/MSD did not meet QC criteria. 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.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