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.O `AGRICULTURAL Analytical Chemists September 8, 2022 Lab No. : STK2251012-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On : August 4, 2022 at 08:30 1868 East Hazelton Ave. Sampled By : Aaron Gooderham Stockton, CA 95205 Received On : August 4, 2022 at 14:20 Description Wellhead Matrix : Drinking Water Project 20978 Carrolton Rd.-WP0042949 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 46.4 2.5 mg/L 1 08/11/2022 12:00 ac EPA 200.7 08/13/2022 12:54 ac Calcium 12 1 mg/L 1 08/11/2022 12:00 ac EPA 200.7 08/13/2022 12:54 ac Magnesium 4 1 mg/L 1 08/11/2022 12:00 ac EPA 200.7 08/13/2022 12:54 ac Potassium 3 1 mg/L 1 h 08/11/2022 12:00 ac EPA 200.7 08/13/2022 12:54 ac Sodium 16 1 mg/L 1 08/11/2022 12:00 ac EPA 200.7 08/13/2022 12:54 ac Total Cations 1.7 --- meq/L 1 h 08/11/2022 12:00 ac EPA 200.7 08/13/2022 12:54 ac Boron ND 0.1 mg/L 1 J 08/11/2022 12:00 ac EPA 200.7 08/11/2022 18:21 ac Copper ND 10 ug/L 10002 1 J 08/11/2022 12:00 ac EPA 200.7 08/11/2022 18:21 ac Iron ND 30 ug/L 3002 1 J 08/11/2022 12:00 ac EPA 200.7 08/11/2022 18:21 ac Manganese ND 10 ug/L 502 1 U 08/11/2022 12:00 ac EPA 200.7 08/11/2022 18:21 ac Zinc 30 20 ug/L 1 08/11/2022 12:00 ac EPA 200.7 08/11/2022 18:21 ac SAR 1.0 0.1 1 08/11/2022 12:00 ac EPA 200.7 08/13/2022 12:54 ac Total Alkalinity(as CaCO3) 60 10 mg/L 1 T 08/23/2022 12:30 amm SM 2320 B 08/24/2022 00:33 amm Hydroxide as OH ND 10 mg/L 1 UT 08/23/2022 12:30 amm SM 2320 B 08/24/2022 00:33 amm Carbonate as CO3 ND 10 mg/L 1 UT 08/23/2022 12:30 amm SM 2320 B 08/24/2022 00:33 amm Bicarbonate as HCO3 80 10 mg/L 1 T 08/23/2022 12:30 amm SM 2320 B 08/24/2022 00:33 amm Sulfate 4.0 0.5 mg/L 5002 1 08/05/2022 11:35 njb EPA 300.0 08/05/2022 13:46 mca Chloride 1 1 mg/L 5002 1 08/05/2022 11:35 njb EPA 300.0 08/05/2022 13:46 mca Nitrate as NO3 1.7 0.4 mg/L 45 1 08/05/2022 11:35 njb EPA 300.0 08/05/2022 13:46 mca Nitrite as N ND 0.1 mg/L 1 1 U 08/05/2022 11:35 njb EPA 300.0 08/05/2022 13:46 mca Nitrate+Nitrite as N 0.4 0.1 mg/L 10 1 08/05/2022 11:35 njb EPA 300.0 08/05/2022 13:46 mca Fluoride 0.2 0.1 mg/L 2 1 08/05/2022 11:35 njb EPA 300.0 08/05/2022 13:46 mca Total Anions 1.5 --- meq/L 1 08/23/2022 12:30 amm SM 2320 B 08/24/2022 00:33 amm pH 7.79 --- units 1 08/04/2022 08:30 ag SM 4500-H+B 08/04/2022 08:30 ag Specific Conductance 148 1 umhos/cm 16002 1 08/18/2022 11:30 sta. SM 2510 B 08/18/2022 11:30 sta Total Dissolved Solids 130 20 mg/L 10002 1 08/08/2022 13:41 ctl SM 2540 C 08/09/2022 11:28 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 08/05/2022 12:36 jba SM 5540 C 08/05/2022 12:41 jba Aggressiveness Index 11.0 1 1 08/04/2022 08:30 ag SM 4500-H+B 08/04/2022 08:30 ag Langelier Index(20°C) -0.8 1 1 08/04/2022 08:30 ag SM 4500-H+B 08/04/2022 08:30 ag Nitrate Nitrogen 0.4 0.1 mg/L 10 1 08/05/2022 11:35 njb EPA 300.0 08/05/2022 13:46 mca DQF Flags Definition: h The MS/MSD did not meet QC criteria. J Reported value is estimated;detected at a concentration below the PQL and above the laboratory MDL. U Constituent results were non-detect. T Exceeded method/regulatory-specific holding time. 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 3 of 8 Page 3 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