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.O `AGRICULTURAL Analytical Chemists May 31, 2024 Lab No. : STK2436248-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 3, 2024 at 12:10 1868 East Hazelton Ave. Sampled By : Naseem Ahmed Stockton, CA 95205 Received On : May 3, 2024 at 14:00 Description :Sample Tap Matrix : Drinking Water Project :23400 N. Staten Island Rd., WP0044665 Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 2150 4.1 mg/L 05/08/2024 12:00 ac 2340B 05/08/2024 18:11 ac Calcium 546 5* mg/L 5 05/08/2024 12:00 ac EPA 200.7 05/08/2024 18:11 ac Magnesium 191 1 mg/L 1 05/07/2024 13:00 ac EPA 200.7 05/07/2024 13:33 ac Potassium 8 1 mg/L 1 05/07/2024 13:00 ac EPA 200.7 05/07/2024 13:33 ac Sodium 890 5* mg/L 5 05/08/2024 12:00 ac EPA 200.7 05/08/2024 18:11 ac Total Cations 81.9 5 meq/L 05/08/2024 12:00 ac Calc. 05/08/2024 18:11 ac Boron 1.0 0.1 mg/L 1 05/07/2024 13:00 ac EPA 200.7 05/07/2024 13:33 ac Copper 10 10 ug/L 1000, 1 05/07/2024 13:00 ac EPA 200.7 05/07/2024 13:33 ac Iron 600 30 ug/L 300, 1 05/07/2024 13:00 ac EPA 200.7 05/07/2024 13:33 ac Manganese 1740 10 ug/L 50, 1 05/07/2024 13:00 ac EPA 200.7 05/07/2024 13:33 ac Zinc 40 20 ug/L 5000 1 05/07/2024 13:00 ac EPA 200.7 05/07/2024 13:33 ac SAR 8.4 05/08/2024 12:00 ac Calc. 05/08/2024 18:11 ac Total Alkalinity(as CaCO3) 110 10 mg/L 1 05/14/2024 13:09 amm SM 4500-11+13 05/14/2024 18:06 amm Hydroxide as OH ND 10 mg/L 1 U 05/14/2024 13:09 amm SM 4500-H+B 05/14/2024 18:06 amm Carbonate as CO3 ND 10 mg/L 1 U 05/14/2024 13:09 amm SM 4500-11+13 05/14/2024 18:06 amm Bicarbonate as HCO3 130 10 mg/L 1 05/14/2024 13:09 amm SM 4500-H+B 05/14/2024 18:06 amm Sulfate 4.0 1* mg/L 500, 2 05/29/2024 10:36 ldm EPA 300.0 05/29/2024 22:14 ldm Chloride 3000 62* mg/L 500, 60 05/29/2024 10:36 ldm EPA 300.0 05/30/2024 03:25 ldm Nitrate as NO3 ND 0.4 mg/L 45 1 U 05/07/2024 12:50 Up SM 4500-NO3 F 05/07/2024 14:12 ilp Nitrite as N ND 0.1 mg/L 1 1 U 05/04/2024 15:10 amm SM 4500-NO2 B 05/04/2024 15:10 amm Nitrate+Nitrite as N ND 0.4 mg/L 10 1 U 05/07/2024 12:50 Up SM 4500-NO3 F 05/07/2024 14:12 ilp Fluoride ND 0.2* mg/L 2 2 U 05/29/2024 10:36 ldm EPA 300.0 05/29/2024 22:14 ldm Total Anions 86.8 62 meq/L 05/29/2024 10:36 ldm Calc. 05/30/2024 03:25 ldm pH 8.0 --- units 1 05/03/2024 12:10 na SM 4500-H+B 05/03/2024 12:10 na Specific Conductance 9370 1 umhos/cm 16001 1 05/14/2024 13:09 amm SM 4500-H+B 05/14/2024 18:06 amm Total Dissolved Solids 7950 20 mg/L 10001 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 05/04/2024 15:25 amm SM 5540 C 05/04/2024 15:36 amm Aggressiveness Index 13.2 10 --- 05/08/2024 12:00 ac Calc. 05/08/2024 18:11 ac Langelier Index(20°C) 1.2 20 --- 05/08/2024 12:00 ac Calc. 05/08/2024 18:11 ac Nitrate Nitrogen ND 0.4 mg/L 10 1 U 05/07/2024 12:50 Up SM 4500-NO3 F 05/07/2024 14:12 ilp DQF Flags Definition: U Constituent results were non-detect. 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