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.O `AGRICULTURAL Analytical Chemists April 21, 2023 Lab No. : STK2334318-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : April 10, 2023 at 09:11 1868 East Hazelton Ave. Sampled By : Aldara Salinas Stockton, CA 95205 Received On : April 10, 2023 at 10:05 Description :Wellhead Matrix : Drinking Water Project :30000 S. Chrisman Rd.Tracy CA- WP0044381 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 335 2.5 mg/L 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Calcium 88 1 mg/L 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Magnesium 28 1 mg/L 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Potassium 2 1 mg/L 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Sodium 144 1 mg/L 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Total Cations 13.0 --- meq/L 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Boron 1.1 0.1 mg/L 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Copper 20 10 ug/L 10002 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Iron 170 30 ug/L 3002 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Manganese ND 10 ug/L 502 1 J 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Zinc 140 20 ug/L 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac SAR 3.4 0.1 1 04/11/2023 15:00 ac EPA 200.7 04/11/2023 16:50 ac Total Alkalinity(as CaCO3) 250 10 mg/L 1 04/16/2023 22:43 amm SM 4500-H+B 04/17/2023 06:15 amm Hydroxide as OH ND 10 mg/L 1 U 04/16/2023 22:43 amm SM 4500-H+B 04/17/2023 06:15 amm Carbonate as CO3 ND 10 mg/L 1 U 04/16/2023 22:43 amm SM 4500-H+B 04/17/2023 06:15 amm Bicarbonate as HCO3 300 10 mg/L 1 04/16/2023 22:43 amm SM 4500-H+B 04/17/2023 06:15 amm Sulfate 232 1.5* mg/L 5002 3 04/11/2023 11:59 ldm EPA 300.0 04/12/2023 07:08 ldm Chloride 165 3* mg/L 5002 3 1 04/11/2023 11:59 ldm EPA 300.0 04/12/2023 07:08 ldm Nitrate as NO3 49.2 0.4 mg/L 45 1 04/11/2023 11:59 ldm EPA 300.0 04/11/2023 19:59 ldm Nitrite as N ND 0.1 mg/L 1 1 U 04/11/2023 11:59 ldm EPA 300.0 04/11/2023 19:59 ldm Nitrate+Nitrite as N 11.1 0.1 mg/L 10 1 04/11/2023 11:59 ldm EPA 300.0 04/11/2023 19:59 ldm Fluoride ND 0.1 mg/L 2 1 J 04/11/2023 11:59 ldm EPA 300.0 04/11/2023 19:59 ldm Total Anions 15.2 --- meq/L 1 1J 04/16/2023 22:43 amm SM 4500-H+B 04/17/2023 06:15 amm pH 7.3 units 1 04/10/2023 09:11 as SM 4500-H+B 04/10/2023 09:21 as Specific Conductance 1470 1 umhos/cm 16002 1 04/16/2023 22:43 amm SM 4500-H+B 04/17/2023 06:15 amm Total Dissolved Solids 990 20 mg/L 10002 1 04/12/2023 09:48 ctl SM 2540 C 04/13/2023 12:00 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 04/12/2023 07:18 krh SM 5540 C 04/12/2023 07:34 krh Aggressiveness Index 12.0 1 1 04/10/2023 09:11 as SM 4500-H+B 04/10/2023 09:21 as Langelier Index(20°C) 0.1 1 1 04/10/2023 09:11 as SM 4500-H+B 04/10/2023 09:21 as Nitrate Nitrogen 11.1 0.1 mg/L 10 1 04/11/2023 11:59 ldm EPA 300.0 04/11/2023 19:59 ldm DQF Flags Definition: J Reported value is estimated;detected at a concentration below the RL and above the laboratory MDL. U Constituent results were non-detect. 1 The MS/MSD did not meet QC criteria. ND=Non-Detected, RL=Reporting Level*RL adusted 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