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.O `AGRICULTURAL Analytical Chemists July 18, 2024 Lab No. : STK2439929-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :July 8, 2024 at 09:04 1868 East Hazelton Ave. Sampled By : Rena LeRoy Stockton, CA 95205 Received On :July 8, 2024 at 09:37 Description :Well Head Matrix : Drinking Water Project :27215 E.EdwardsAve Escalon Ca 95320 WP0044003 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 147 2.5 mg/L 07/10/2024 12:00 ac 2340B 07/10/2024 16:20 ac Calcium 31 1 mg/L 1 07/10/2024 12:00 ac EPA 200.7 07/10/2024 16:20 ac Magnesium 17 1 mg/L 1 07/10/2024 12:00 ac EPA 200.7 07/10/2024 16:20 ac Potassium 4 1 mg/L 1 07/10/2024 12:00 ac EPA 200.7 07/10/2024 16:20 ac Sodium 21 1 mg/L 1 07/10/2024 12:00 ac EPA 200.7 07/10/2024 16:20 ac Total Cations 4.0 1 meq/L 07/10/2024 12:00 ac Calc. 07/10/2024 16:20 ac Boron ND 0.1 mg/L 1 U 07/10/2024 12:00 ac EPA 200.7 07/10/2024 16:20 ac Copper ND 10 ug/L 10002 1 U 07/10/2024 12:00 ac EPA 200.7 07/10/2024 16:20 ac Iron ND 30 ug/L 3002 1 U 07/10/2024 12:00 ac EPA 200.7 07/10/2024 16:20 ac Manganese ND 10 ug/L 502 1 U 07/10/2024 12:00 ac EPA 200.7 07/10/2024 16:20 ac Zinc ND 20 ug/L 5000 1 U 07/10/2024 12:00 ac EPA 200.7 07/10/2024 16:20 ac SAR 0.8 07/10/2024 12:00 ac Calc. 07/10/2024 16:20 ac Total Alkalinity(as CaCO3) 160 10 mg/L 1 07/16/2024 14:04 amm SM 4500-H+B 07/17/2024 04:29 amm Hydroxide as OH ND 10 mg/L 1 U 07/16/2024 14:04 amm SM 4500-H+B 07/17/2024 04:29 amm Carbonate as CO3 ND 10 mg/L 1 U 07/16/2024 14:04 amm SM 4500-H+B 07/17/2024 04:29 amm Bicarbonate as HCO3 200 10 mg/L 1 07/16/2024 14:04 amm SM 4500-H+B 07/17/2024 04:29 amm Sulfate 12.6 0.5 mg/L 5002 1 07/09/2024 11:59 ldm EPA 300.0 07/09/2024 18:57 ctl Chloride 10 1 mg/L 5002 1 b 07/09/2024 11:59 ldm EPA 300.0 07/09/2024 18:57 ctl Nitrate as NO3 14.6 0.4 mg/L 45 1 07/09/2024 11:59 ldm EPA 300.0 07/09/2024 18:57 ctl Nitrite as N ND 0.1 mg/L 1 1 Ub 07/09/2024 11:59 ldm EPA 300.0 07/09/2024 18:57 ctl Nitrate+Nitrite as N 3.3 0.1 mg/L 10 1 07/09/2024 11:59 ldm EPA 300.0 07/09/2024 18:57 ctl Fluoride 0.2 0.1 mg/L 2 1 b 07/09/2024 11:59 ldm EPA 300.0 07/09/2024 18:57 ctl Total Anions 4.1 10 meq/L 07/09/2024 11:59 ldm Calc. 07/09/2024 18:57 ctl pH 7.61 --- units 1 07/08/2024 09:04 rl SM 4500-H+B 07/08/2024 09:04 rl Specific Conductance 393 1 umhos/cm 16002 1 07/16/2024 14:04 amm SM 4500-H+B 07/17/2024 04:29 amm Total Dissolved Solids 270 20 mg/L 10002 1 07/09/2024 15:30 ctl SM 2540 C 07/10/2024 11:30 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 07/09/2024 14:28 krh SM 5540 C 07/09/2024 14:35 krh Aggressiveness Index 11.7 10 --- 07/10/2024 12:00 ac Calc. 07/10/2024 16:20 ac Langelier Index(20°C) -0.1 20 --- 07/10/2024 12:00 ac Calc. 07/10/2024 16:20 ac Nitrate Nitrogen 3.3 0.1 mg/L 10 1 07/09/2024 11:59 ldm EPA 300.0 07/09/2024 18:57 ctl DQF Flags Definition: U Constituent results were non-detect. b The Blank was positive for constituent but less than the PQL 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