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.O `AGRICULTURAL Analytical Chemists August 19, 2022 Lab No. : STK2250367-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On :July 22, 2022 at 11:42 1868 East Hazelton Ave. Sampled By : Aaron Gooderham Stockton, CA 95205 Received On :July 22, 2022 at 13:55 Description Wellhead Matrix : Drinking Water Project 18966 Louise Ave-WP0042542 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 108 2.5 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Calcium 25 1 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Magnesium 11 1 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Potassium 4 1 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Sodium 20 1 mg/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Total Cations 3.1 --- meq/L 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Boron ND 0.1 mg/L 1 J 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Copper ND 10 ug/L 1000, 1 J 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Iron ND 30 ug/L 300, 1 U 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Manganese ND 10 ug/L 50, 1 U 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Zinc ND 20 ug/L 1 U 07/29/2022 08:00 ac EPA 200.7 08/01/2022 15:47 ac SAR 0.8 0.1 1 07/29/2022 08:00 ac EPA 200.7 07/29/2022 16:15 ac Total Alkalinity(as CaCO3) 90 10 mg/L 1 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:20 amm Hydroxide as OH ND 10 mg/L 1 U 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:20 amm Carbonate as CO3 ND 10 mg/L 1 U 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:20 amm Bicarbonate as HCO3 110 10 mg/L 1 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:20 amm Sulfate 10.6 0.5 mg/L 500, 1 07/26/2022 17:48 mca EPA 300.0 07/27/2022 01:25 mca Chloride 13 1 mg/L 500, 1 b 07/26/2022 17:48 mca EPA 300.0 07/27/2022 01:25 mca Nitrate as NO3 31.8 0.2 mg/L 45 1 07/25/2022 11:42 Ifs SM 4500-NO3 F 07/26/2022 14:38 Ifs Nitrite as N ND 0.1 mg/L 1 1 U 07/23/2022 20:25 amm SM 4500-NO2 B 07/23/2022 21:06 amm Nitrate+Nitrite as N 7.2 0.2 mg/L 10 1 07/25/2022 11:42 Ifs SM 4500-NO3 F 07/26/2022 14:38 Ifs Fluoride 0.1 0.1 mg/L 2 1 07/26/2022 17:48 mca EPA 300.0 07/27/2022 01:25 mca Total Anions 2.9 --- meq/L 1 b 07/29/2022 23:15 amm SM 2320 B 07/30/2022 01:20 amm pH 7.64 --- units 1 07/22/2022 11:42 ag SM 4500-H+B 07/22/2022 11:42 ag Specific Conductance 315 1 umhos/cm 16001 1 08/15/2022 16:44 sta SM 2510 B 08/15/2022 16:44 sta Total Dissolved Solids 240 20 mg/L 10001 1 07/26/2022 14:23 ctl SM 2540 C 07/27/2022 09:32 ctl MBAs(foaming agents) ND 0.05 mg/L 0.52 1 U 07/23/2022 17:20 amm SM 5540 C 07/23/2022 18:14 amm Aggressiveness Index 11.4 1 1 07/22/2022 11:42 ag SM 4500-H+B 07/22/2022 11:42 ag Langelier Index(20°C) -0.4 1 1 07/22/2022 11:42 ag SM 4500-H+B 07/22/2022 11:42 ag Nitrate Nitrogen 7.2 0.2 mg/L 10 1 07/25/2022 11:42 Ifs SM 4500-NO3 F 07/26/2022 14:38 Ifs DQF Flags Definition: J Reported value is estimated;detected at a concentration below the PQL and above the laboratory MDL. 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 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