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.O `AGRICULTURAL Analytical Chemists January 23, 2024 Lab No. : STK2430592-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :January 10, 2024 at 10:29 1868 East Hazelton Ave. Sampled By : Aldara Salinas Stockton, CA 95205 Received On :January 10, 2024 at 15:05 Description :Well Head Matrix : Drinking Water Project :9145 Lorraine Rd Tracy CaWP0043645 Sample Results - Inorganic • ,. General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 231 2.5 mg/L 1 01/12/2024 09:00 ac 2340B 01/12/2024 15:59 ac Calcium 63 1 mg/L 1 01/12/2024 09:00 ac EPA 200.7 01/12/2024 15:59 ac Magnesium 18 1 mg/L 1 01/12/2024 09:00 ac EPA 200.7 01/12/2024 15:59 ac Potassium 3 1 mg/L 1 01/12/2024 09:00 ac EPA 200.7 01/12/2024 15:59 ac Sodium 80 1 mg/L 1 01/12/2024 09:00 ac EPA 200.7 01/12/2024 15:59 ac Total Cations 8.2 --- meq/L 1 01/12/2024 09:00 ac Calc. 01/12/2024 15:59 ac Boron 1.3 0.1 mg/L 1 01/12/2024 09:00 ac EPA 200.7 01/12/2024 15:59 ac Copper 3 1 ug/L 10002 1 01/15/2024 14:00 ac EPA 200.8 01/15/2024 21:46 ac Iron 60 30 ug/L 3002 1 01/12/2024 09:00 ac EPA 200.7 01/12/2024 15:59 ac Manganese 3.2 0.5 ug/L 502 1 01/15/2024 14:00 ac EPA 200.8 01/15/2024 21:46 ac Zinc 20 10 ug/L 5000 1 1 01/15/2024 14:00 ac EPA 200.8 01/15/2024 21:46 ac SAR 2.3 0.1 1 01/12/2024 09:00 ac Calc. 01/12/2024 15:59 ac Total Alkalinity(as CaCO3) 140 10 mg/L 1 01/14/2024 19:37 amm SM 4500-H+B 01/15/2024 00:01 amm Hydroxide as OH ND 10 mg/L 1 U 01/14/2024 19:37 amm SM 4500-H+B 01/15/2024 00:01 amm Carbonate as CO3 ND 10 mg/L 1 U 01/14/2024 19:37 amm SM 4500-H+B 01/15/2024 00:01 amm Bicarbonate as HCO3 170 10 mg/L 1 01/14/2024 19:37 amm SM 4500-H+B 01/15/2024 00:01 amm Sulfate 148 0.5 mg/L 5002 1 01/11/2024 13:22 ldm EPA 300.0 01/12/2024 04:40 ldm Chloride 81 1 mg/L 5002 1 01/11/2024 13:22 ldm EPA 300.0 01/12/2024 04:40 ldm Nitrate as NO3 20.8 0.4 mg/L 45 1 1 01/11/2024 13:22 ldm EPA 300.0 01/12/2024 04:40 ldm Nitrite as N ND 0.1 mg/L 1 1 U 01/11/2024 13:22 ldm EPA 300.0 01/12/2024 04:40 ldm Nitrate+Nitrite as N 4.7 0.1 mg/L 10 1 1 01/11/2024 13:22 ldm EPA 300.0 01/12/2024 04:40 ldm Fluoride 0.2 0.1 mg/L 2 1 01/11/2024 13:22 ldm EPA 300.0 01/12/2024 04:40 ldm Total Anions 8.5 --- meq/L 1 1 01/14/2024 19:37 amm Calc. 01/15/2024 00:01 amm pH 7.6 --- units 1 01/10/2024 10:29 as SM 4500-H+B 01/10/2024 10:29 as Specific Conductance 828 1 umhos/cm 16002 1 01/14/2024 19:37 amm SM 4500-H+B 01/15/2024 00:01 amm Total Dissolved Solids 520 20 mg/L 10002 1 01/11/2024 17:00 ctl SM 2540 C 01/12/2024 12:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 01/11/2024 13:31 krh SM 5540 C 01/11/2024 13:40 krh Aggressiveness Index 11.9 1 1 01/10/2024 10:29 as Calc. 01/10/2024 10:29 as Langelier Index(20°C) 0.07 1 1 01/10/2024 10:29 as Calc. 01/10/2024 10:29 as Nitrate Nitrogen 4.7 0.1 mg/L 10 1 1 01/11/2024 13:22 ldm EPA 300.0 01/12/2024 04:40 ldm Metals,Total Arsenic 1 1 ug/L 10 1 01/15/2024 14:00 ac EPA 200.8 01/15/2024 21:46 ac DQF Flags Definition: 1 The MS/MSD did not meet QC criteria. 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