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.O `AGRICULTURAL Analytical Chemists December 16, 2022 Lab No. : STK2256390-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On : November 14, 2022 at 09:20 1868 East Hazelton Ave. Sampled By : Michael Suszycki Stockton, CA 95205 Received On : November 14, 2022 at 14:53 Description : Wellhead Matrix : Drinking Water Project 15515 E. Harney Ln.,Lodi Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 70.3 2.5 mg/L 1 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Calcium 15 1 mg/L 1 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Magnesium 8 1 mg/L 1 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Potassium 3 1 mg/L 1 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Sodium 16 1 mg/L 1 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Total Cations 2.2 --- meq/L 1 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Boron ND 0.1 mg/L 1 U 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Copper ND 10 ug/L 10002 1 J 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Iron ND 30 ug/L 3002 1 U 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Manganese ND 10 ug/L 502 1 U 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Zinc 20 20 ug/L 1 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac SAR 0.8 0.1 1 11/15/2022 11:00 ac EPA 200.7 11/15/2022 17:26 ac Total Alkalinity(as CaCO3) 90 10 mg/L 1 11/20/2022 16:07 amm SM 4500-H+B 11/21/2022 03:22 amm Hydroxide as OH ND 10 mg/L 1 U 11/20/2022 16:07 amm SM 4500-H+B 11/21/2022 03:22 amm Carbonate as CO3 ND 10 mg/L 1 U 11/20/2022 16:07 amm SM 4500-H+B 11/21/2022 03:22 amm Bicarbonate as HCO3 110 10 mg/L 1 11/20/2022 16:07 amm SM 4500-H+B 11/21/2022 03:22 amm Sulfate 3.7 0.5 mg/L 5002 1 T 12/14/2022 14:02 Idm EPA 300.0 12/14/2022 22:02 Idm Chloride 8 1 mg/L 5002 1 1bT 12/14/2022 14:02 Idm EPA 300.0 12/14/2022 22:02 Idm Nitrate as NO3 7.4 0.4 mg/L 45 1 11/15/2022 13:00 Ifs SM 4500-NO3 F 11/15/2022 15:31 Ifs Nitrite as N ND 0.2 mg/L 1 1 U 11/15/2022 13:00 Ifs SM 4500-NO3 F 11/15/2022 15:29 Ifs Nitrate+Nitrite as N 1.7 0.4 mg/L 10 1 11/15/2022 13:00 Ifs SM 4500-NO3 F 11/15/2022 15:31 Ifs Fluoride 0.2 0.1 mg/L 2 1 T 12/14/2022 14:02 ldm EPA 300.0 12/14/2022 22:02 Idm Total Anions 2.2 --- meq/L 1 lb 11/20/2022 16:07 amm SM 4500-H+B 11/21/2022 03:22 amm pH 7.7 units 1 T 11/20/2022 16:07 amm SM 4500-H+B 11/21/2022 03:22 amm Specific Conductance 220 1 umhos/cm 16002 1 11/20/2022 16:07 amm SM 4500-H+B 11/21/2022 03:22 amm Total Dissolved Solids 170 20 mg/L 10002 1 11/16/2022 11:56 ctl SM 2540 C 11/17/2022 10:52 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 11/15/2022 18:01 jba SM 5540 C 11/15/2022 18:09 jba Aggressiveness Index 11.2 1 1 11/20/2022 16:07 amm SM 4500-H+B 11/21/2022 03:22 amm Langelier Index(20°C) -0.6 1 1 11/20/2022 16:07 amm SM 4500-H+B 11/21/2022 03:22 amm Nitrate Nitrogen 1.7 0.4 mg/L 10 1 11/15/2022 13:00 Ifs SM 4500-NO3 F 11/15/2022 15:31 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. T Exceeded method/regulatory-specific holding time. 1 The MS/MSD did not meet QC criteria. 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