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.O `AGRICULTURAL Analytical Chemists May 16, 2024 Lab No. : STK2436309-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 6, 2024 at 11:35 1868 East Hazelton Ave. Sampled By : Naseem Ahmed Stockton, CA 95205 Received On : May 6, 2024 at 12:19 Description :Wellhead Matrix : Drinking Water Project :29209 E. Orange Ave., Escalon- WP0044744 Sample Results - Inorganic • ,. General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 108 2.5 mg/L 05/08/2024 12:00 ac 2340B 05/08/2024 14:06 ac Calcium 30 1 mg/L 1 05/08/2024 12:00 ac EPA 200.7 05/08/2024 14:06 ac Magnesium 8 1 mg/L 1 05/08/2024 12:00 ac EPA 200.7 05/08/2024 14:06 ac Potassium 3 1 mg/L 1 05/08/2024 12:00 ac EPA 200.7 05/08/2024 14:06 ac Sodium 23 1 mg/L 1 05/08/2024 12:00 ac EPA 200.7 05/08/2024 14:06 ac Total Cations 3.2 1 meq/L 05/08/2024 12:00 ac Calc. 05/08/2024 14:06 ac Boron ND 0.1 mg/L 1 U 05/08/2024 12:00 ac EPA 200.7 05/08/2024 14:06 ac Copper ND 10 ug/L 10002 1 U 05/08/2024 12:00 ac EPA 200.7 05/08/2024 14:06 ac Iron ND 30 ug/L 3002 1 U 05/08/2024 12:00 ac EPA 200.7 05/08/2024 14:06 ac Manganese ND 10 ug/L 502 1 U 05/08/2024 12:00 ac EPA 200.7 05/08/2024 14:06 ac Zinc ND 20 ug/L 5000 1 U 05/08/2024 12:00 ac EPA 200.7 05/08/2024 14:06 ac SAR 1 05/08/2024 12:00 ac Calc. 05/08/2024 14:06 ac Total Alkalinity(as CaCO3) 120 10 mg/L 1 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:22 amm Hydroxide as OH ND 10 mg/L 1 U 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:22 amm Carbonate as CO3 ND 10 mg/L 1 U 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:22 amm Bicarbonate as HCO3 150 10 mg/L 1 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:22 amm Sulfate 7.2 0.5 mg/L 5002 1 05/07/2024 09:59 ldm EPA 300.0 05/07/2024 19:36 ldm Chloride 7 1 mg/L 5002 1 05/07/2024 09:59 ldm EPA 300.0 05/07/2024 19:36 ldm Nitrate as NO3 23.2 0.4 mg/L 45 1 05/07/2024 09:59 ldm EPA 300.0 05/07/2024 19:36 ldm Nitrite as N ND 0.1 mg/L 1 1 U 05/07/2024 09:59 ldm EPA 300.0 05/07/2024 19:36 ldm Nitrate+Nitrite as N 5.2 0.1 mg/L 10 1 05/07/2024 09:59 ldm EPA 300.0 05/07/2024 19:36 ldm Fluoride 0.1 0.1 mg/L 2 1 05/07/2024 09:59 ldm EPA 300.0 05/07/2024 19:36 ldm Total Anions 3.2 10 meq/L 05/07/2024 09:59 ldm Calc. 05/07/2024 19:36 ldm pH 8.0 --- units 1 05/06/2024 11:35 na SM 4500-H+B 05/06/2024 11:35 na Specific Conductance 317 1 umhos/cm 16002 1 05/13/2024 18:09 amm SM 4500-H+B 05/14/2024 01:22 amm Total Dissolved Solids 220 20 mg/L 10002 1 05/07/2024 16:00 ctl SM 2540 C 05/08/2024 10:30 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 05/07/2024 15:12 krh SM 5540 C 05/07/2024 15:17 krh Aggressiveness Index 12.0 10 --- 05/08/2024 12:00 ac Calc. 05/08/2024 14:06 ac Langelier Index(20°C) 0.1 20 --- 05/08/2024 12:00 ac Calc. 05/08/2024 14:06 ac Nitrate Nitrogen 5.2 0.1 mg/L 10 1 05/07/2024 09:59 ldm EPA 300.0 05/07/2024 19:36 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