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.O `AGRICULTURAL Analytical Chemists November 16, 2022 Lab No. : STK2255429-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On : October 26, 2022 at 11:30 1868 East Hazelton Ave. Sampled By : Aaron Gooderham Stockton, CA 95205 Received On : October 26, 2022 at 13:02 Description Wellhead Matrix : Drinking Water Project 8615 ViaCarano PI-WP0041295 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 72.8 2.5 mg/L 1 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Calcium 16 1 mg/L 1 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Magnesium 8 1 mg/L 1 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Potassium 3 1 mg/L 1 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Sodium 15 1 mg/L 1 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Total Cations 2.2 --- meq/L 1 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Boron 0.1 0.1 mg/L 1 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Copper ND 10 ug/L 10002 1 U 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Iron ND 30 ug/L 3002 1 J 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Manganese ND 10 ug/L 502 1 U 11/07/2022 08:00 ac EPA 200.7 11/08/2022 23:25 ac Zinc 50 20 ug/L 1 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac SAR 0.8 0.1 1 11/07/2022 08:00 ac EPA 200.7 11/07/2022 11:03 ac Total Alkalinity(as CaCO3) 70 10 mg/L 1 10/31/2022 14:34 amm SM 4500-H+B 10/31/2022 21:01 amm Hydroxide as OH ND 10 mg/L 1 U 10/31/2022 14:34 amm SM 4500-H+B 10/31/2022 21:01 amm Carbonate as CO3 ND 10 mg/L 1 U 10/31/2022 14:34 amm SM 4500-H+B 10/31/2022 21:01 amm Bicarbonate as HCO3 90 10 mg/L 1 10/31/2022 14:34 amm SM 4500-H+B 10/31/2022 21:01 amm Sulfate 11.0 0.5 mg/L 5002 1 11/09/2022 11:03 ldm EPA 300.0 11/09/2022 15:59 sbl Chloride 12 1 mg/L 5002 1 11/09/2022 11:03 ldm EPA 300.0 11/09/2022 15:59 sbl Nitrate as NO3 7.7 0.2 mg/L 45 1 10/27/2022 12:45 Ifs SM 4500-NO3 F 10/27/2022 15:39 Ifs Nitrite as N ND 0.2 mg/L 1 1 U 10/27/2022 12:45 Ifs SM 4500-NO3 F 10/27/2022 15:37 Ifs Nitrate+Nitrite as N 1.7 0.2 mg/L 10 1 10/27/2022 12:45 Ifs SM 4500-NO3 F 10/27/2022 15:39 Ifs Fluoride 0.2 0.1 mg/L 2 1 11/09/2022 11:03 ldm EPA 300.0 11/09/2022 15:59 sbl Total Anions 2.2 --- meq/L 1 10/31/2022 14:34 amm SM 4500-H+B 10/31/2022 21:01 amm pH 7.2 --- units 1 10/26/2022 11:30 ag 10/26/2022 11:30 ag Specific Conductance 218 1 umhos/cm 16002 1 10/31/2022 14:34 amm SM 4500-H+B 10/31/2022 21:01 amm Total Dissolved Solids 170 20 mg/L 10002 1 10/28/2022 09:56 ctl SM 2540 C 10/31/2022 12:08 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 10/27/2022 15:07 jba SM 5540 C 10/27/2022 15:27 jba Aggressiveness Index 10.6 1 1 10/26/2022 11:30 ag 10/26/2022 11:30 ag Langelier Index(20°C) -1.2 1 1 10/26/2022 11:30 ag 10/26/2022 11:30 ag Nitrate Nitrogen 1.7 0.2 mg/L 10 1 10/27/2022 12:45 Ifs SM 4500-NO3 F 10/27/2022 15:39 Ifs DQF Flags Definition: U Constituent results were non-detect. J Reported value is estimated;detected at a concentration below the PQL and above the laboratory MDL. 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.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