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ENVIRONMENTAINW. . , Analytical Chemists September 6, 2024 Lab No. : STK2452292-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : August 19, 2024 at 10:21 1868 East Hazelton Ave. Sampled By : Rena LeRoy Stockton, CA 95205 Received On : August 19, 2024 at 11:28 Description Wellhead Matrix : Drinking Water Project 20287 E. Mariposa Rd-WP0045420 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 153 2.5 mg/L 08/21/2024 09:00 ac 2340E 08/21/2024 12:15 ac Calcium 30 1 mg/L 1 08/21/2024 09:00 ac EPA 200.7 08/21/2024 12:15 ac Magnesium 19 1 mg/L 1 08/21/2024 09:00 ac EPA 200.7 08/21/2024 12:15 ac Potassium 4 1 mg/L 1 08/21/2024 09:00 ac EPA 200.7 08/21/2024 12:15 ac Sodium 23 1 mg/L 1 08/21/2024 09:00 ac EPA 200.7 08/21/2024 12:15 ac Total Cations 4.2 1 meq/L 08/21/2024 09:00 ac Calc. 08/21/2024 12:15 ac Boron ND 0.1 mg/L 1 U 08/21/2024 09:00 ac EPA 200.7 08/21/2024 12:15 ac Copper 20 10 ug/L 10002 1 08/21/2024 09:00 ac EPA 200.7 08/21/2024 12:15 ac Iron ND 30 ug/L 3002 1 U 08/21/2024 09:00 ac EPA 200.7 08/21/2024 12:15 ac Manganese ND 10 ug/L 502 1 U 08/21/2024 09:00 ac EPA 200.7 08/21/2024 12:15 ac Zinc ND 20 ug/L 5000 1 U 08/21/2024 09:00 ac EPA 200.7 08/21/2024 12:15 ac SAR 0.8 08/21/2024 09:00 ac Calc. 08/21/2024 12:15 ac Total Alkalinity(as CaCO3) 150 10 mg/L 1 08/21/2024 14:00 amm SM 4500-H+B 08/21/2024 22:21 amm Hydroxide as OH ND 10 mg/L 1 U 08/21/2024 14:00 amm SM 4500-H+B 08/21/2024 22:21 amm Carbonate as CO3 ND 10 mg/L 1 U 08/21/2024 14:00 amm SM 4500-H+B 08/21/2024 22:21 amm Bicarbonate as HCO3 180 10 mg/L 1 08/21/2024 14:00 amm SM 4500-H+B 08/21/2024 22:21 amm Sulfate 14.3 0.5 mg/L 5002 1 08/23/2024 15:18 Idm EPA 300.0 08/24/2024 15:55 Ifs Chloride 30 1 mg/L 5002 1 08/23/2024 15:18 ldm EPA 300.0 08/24/2024 15:55 Ifs Nitrate as NO3 17.8 0.4 mg/L 45 1 08/20/2024 15:00 ilp SM 4500-NO3 F 08/20/2024 15:57 ilp Nitrite as N ND 0.2 mg/L 1 1 U 08/20/2024 15:00 ilp SM 4500-NO3 F 08/20/2024 15:54 ilp Nitrate+Nitrite as N 4.0 0.4 mg/L 10 1 08/20/2024 15:00 ilp SM 4500-NO3 F 08/20/2024 15:57 ilp Fluoride 0.1 0.1 mg/L 2 1 08/23/2024 15:18 ldm EPA 300.0 08/24/2024 15:55 Ifs Total Anions 4.4 10 meq/L 08/23/2024 15:18 ldm Calc. 08/24/2024 15:55 Ifs pH 9.48 --- units 1 08/19/2024 10:21 rl SM 4500-H+B 08/19/2024 10:21 rl Specific Conductance 432 1 umhos/cm 16002 1 08/21/2024 14:00 amm SM 4500-H+B 08/21/2024 22:21 amm Total Dissolved Solids 310 20 mg/L 10002 1 08/21/2024 11:20 ctl SM 2540 C 08/22/2024 11:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 08/20/2024 14:58 krh SM 5540 C 08/20/2024 15:07 krh Aggressiveness Index 13.5 10 --- 08/21/2024 09:00 ac Calc. 08/21/2024 12:15 ac Langelier Index(20°C) 1.7 20 --- 08/21/2024 09:00 ac Calc. 08/21/2024 12:15 ac Nitrate Nitrogen 4.0 0.4 mg/L 10 1 08/20/2024 15:00 ilp SM 4500-NO3 F 08/20/2024 15:57 ilp 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.Undo Avenue 3442 Empresa Drive,Suite D 9411 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 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