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.O `AGRICULTURAL Analytical Chemists December 18, 2023 Lab No. : STK2356366-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : November 29, 2023 at 08:43 1868 East Hazelton Ave. Sampled By : Aldara Salinas Stockton, CA 95205 Received On : November 29, 2023 at 11:42 Description :Wellhead Matrix : Drinking Water Project :21589 S.Lammers Rd,Tracy- WP0041525 Sample Results - Inorganic • ,. General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 331 2.5 mg/L 1 11/30/2023 16:00 ejc 2340B 12/05/2023 19:39 ac Calcium 83 1 mg/L 1 11/30/2023 16:00 ejc EPA 200.7 12/05/2023 19:39 ac Magnesium 30 1 mg/L 1 11/30/2023 16:00 ejc EPA 200.7 12/05/2023 19:39 ac Potassium 3 1 mg/L 1 11/30/2023 16:00 ejc EPA 200.7 12/05/2023 19:39 ac Sodium 102 1 mg/L 1 11/30/2023 16:00 ejc EPA 200.7 12/05/2023 19:39 ac Total Cations 11.1 --- meq/L 1 11/30/2023 16:00 ejc Calc. 12/05/2023 19:39 ac Boron 0.75 0.05 mg/L 1 11/30/2023 16:00 ejc EPA 200.7 12/05/2023 19:39 ac Copper ND 10 ug/L 10002 1 U 11/30/2023 16:00 ejc EPA 200.7 12/05/2023 19:39 ac Iron ND 50 ug/L 3002 1 U 11/30/2023 16:00 ejc EPA 200.7 12/05/2023 19:39 ac Manganese ND 10 ug/L 502 1 U 11/30/2023 16:00 ejc EPA 200.7 12/05/2023 19:39 ac Zinc 20 20 ug/L 5000 1 11/30/2023 16:00 ejc EPA 200.7 12/05/2023 19:39 ac SAR 2.4 0.1 1 11/30/2023 16:00 ejc Calc. 12/05/2023 19:39 ac Total Alkalinity(as CaCO3) 80 10 mg/L 1 12/03/2023 15:56 amm SM 4500-H+B 12/03/2023 19:47 amm Hydroxide as OH ND 10 mg/L 1 U 12/03/2023 15:56 amm SM 4500-H+B 12/03/2023 19:47 amm Carbonate as CO3 ND 10 mg/L 1 U 12/03/2023 15:56 amm SM 4500-H+B 12/03/2023 19:47 amm Bicarbonate as HCO3 100 10 mg/L 1 12/03/2023 15:56 amm SM 4500-H+B 12/03/2023 19:47 amm Sulfate 152 0.5 mg/L 5002 1 11/30/2023 16:26 ldm EPA 300.0 12/01/2023 08:11 ldm Chloride 210 4* mg/L 5002 4 11/30/2023 16:26 ldm EPA 300.0 12/01/2023 13:22 ldm Nitrate as NO3 35.9 0.4 mg/L 45 1 11/30/2023 16:26 ldm EPA 300.0 12/01/2023 08:11 ldm Nitrite as N ND 0.1 mg/L 1 1 U 11/30/2023 16:26 ldm EPA 300.0 12/01/2023 08:11 ldm Nitrate+Nitrite as N 8.1 0.1 mg/L 10 1 11/30/2023 16:26 ldm EPA 300.0 12/01/2023 08:11 ldm Fluoride ND 0.1 mg/L 2 1 U 11/30/2023 16:26 ldm EPA 300.0 12/01/2023 08:11 ldm Total Anions 11.3 --- meq/L 11/30/2023 16:26 ldm Calc. 12/01/2023 13:22 ldm pH 7.5 units 1 11/29/2023 08:43 as SM 4500-H+B 11/29/2023 08:43 as Specific Conductance 1190 1 umhos/cm 16002 1 12/03/2023 15:56 amm SM 4500-H+B 12/03/2023 19:47 amm Total Dissolved Solids 950 20 mg/L 10002 1 I 12/01/2023 10:30 ctl SM 2540 C 12/04/2023 11:45 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 11/30/2023 14:23 krh SM 5540 C 11/30/2023 14:32 krh Aggressiveness Index 11.7 1 1 11/29/2023 08:43 as Calc. 11/29/2023 08:43 as Langelier Index(20°C) -0.2 1 1 I 11/29/2023 08:43 as Calc. 11/29/2023 08:43 as Nitrate Nitrogen 8.1 0.1 mg/L 10 1 11/30/2023 16:26 ldm EPA 300.0 12/01/2023 08:11 ldm DQF Flags Definition: U Constituent results were non-detect. I The RPD for the laboratory duplicate exceeded laboratory 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.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