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.O `AGRICULTURAL Analytical Chemists August 13, 2024 Lab No. : STK2451247-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : August 1, 2024 at 09:20 1868 East Hazelton Ave. Sampled By : Rena LeRoy Stockton, CA 95205 Received On : August 1, 2024 at 09:55 Description :Wellhead Matrix : Drinking Water Project :28424 Lemon Ave., Escalon, CA 95330-WP0044550 Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 76.2 2.5 mg/L 08/05/2024 13:00 ac 2340B 08/05/2024 16:56 ac Calcium 19 1 mg/L 1 08/05/2024 13:00 ac EPA 200.7 08/05/2024 16:56 ac Magnesium 7 1 mg/L 1 08/05/2024 13:00 ac EPA 200.7 08/05/2024 16:56 ac Potassium 3 1 mg/L 1 08/05/2024 13:00 ac EPA 200.7 08/05/2024 16:56 ac Sodium 17 1 mg/L 1 08/05/2024 13:00 ac EPA 200.7 08/05/2024 16:56 ac Total Cations 2.3 1 meq/L 08/05/2024 13:00 ac Calc. 08/05/2024 16:56 ac Boron ND 0.1 mg/L 1 U 08/05/2024 13:00 ac EPA 200.7 08/05/2024 16:56 ac Copper ND 10 ug/L 10002 1 U 08/05/2024 13:00 ac EPA 200.7 08/05/2024 16:56 ac Iron ND 30 ug/L 3002 1 U 08/05/2024 13:00 ac EPA 200.7 08/05/2024 16:56 ac Manganese ND 10 ug/L 502 1 U 08/05/2024 13:00 ac EPA 200.7 08/05/2024 16:56 ac Zinc ND 20 ug/L 5000 1 U 08/05/2024 13:00 ac EPA 200.7 08/05/2024 16:56 ac SAR 0.8 08/05/2024 13:00 ac Calc. 08/05/2024 16:56 ac Total Alkalinity(as CaCO3) 90 10 mg/L 1 08/05/2024 15:42 amm SM 4500-H+B 08/05/2024 21:32 amm Hydroxide as OH ND 10 mg/L 1 U 08/05/2024 15:42 amm SM 4500-H+B 08/05/2024 21:32 amm Carbonate as CO3 ND 10 mg/L 1 U 08/05/2024 15:42 amm SM 4500-H+B 08/05/2024 21:32 amm Bicarbonate as HCO3 110 10 mg/L 1 08/05/2024 15:42 amm SM 4500-H+B 08/05/2024 21:32 amm Sulfate 3.9 0.5 mg/L 5002 1 08/07/2024 12:28 Idm EPA 300.0 08/08/2024 15:57 Ifs Chloride 6 1 mg/L 5002 1 08/07/2024 12:28 Idm EPA 300.0 08/08/2024 15:57 Ifs Nitrate as NO3 14.0 0.4 mg/L 45 1 1 08/02/2024 18:00 ilp SM 4500-NO3 F 08/02/2024 18:48 ilp Nitrite as N ND 0.2 mg/L 1 1 U 08/02/2024 18:00 ilp SM 4500-NO3 F 08/02/2024 18:46 ilp Nitrate+Nitrite as N 3.2 0.4 mg/L 10 1 1 08/02/2024 18:00 ilp SM 4500-NO3 F 08/02/2024 18:48 ilp Fluoride 0.1 0.1 mg/L 2 1 08/07/2024 12:28 Idm EPA 300.0 08/08/2024 15:57 Ifs Total Anions 2.3 10 meq/L 08/07/2024 12:28 ldm Calc. 08/08/2024 15:57 Ifs pH 8.63 --- units 1 08/01/2024 09:20 rl SM 4500-H+B 08/01/2024 09:20 rl Specific Conductance 235 1 umhos/cm 16002 1 08/05/2024 15:42 amm SM 4500-H+B 08/05/2024 21:32 amm Total Dissolved Solids 160 20 mg/L 10002 1 08/05/2024 11:00 ctl SM 2540 C 08/06/2024 11:30 ctl MBAs,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 08/02/2024 14:26 krh SM 5540 C 08/02/2024 14:38 krh Aggressiveness Index 12.3 10 --- 08/05/2024 13:00 ac Calc. 08/05/2024 16:56 ac Langelier Index(20°C) 0.5 20 --- 08/05/2024 13:00 ac Calc. 08/05/2024 16:56 ac Nitrate Nitrogen 3.2 0.4 mg/L 10 1 1 08/02/2024 18:00 ilp SM 4500-NO3 F 08/02/2024 18:48 ilp DQF Flags Definition: U Constituent results were non-detect. 1 The MS/MSD did not meet QC criteria. 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