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.O `AGRICULTURAL Analytical Chemists February 5, 2024 Lab No. : STK2430783-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :January 12, 2024 at 10:40 1868 East Hazelton Ave. Sampled By : Naseem Ahmed Stockton, CA 95205 Received On :January 12, 2024 at 11:29 Description :Well Head Matrix : Drinking Water Project :21537 N De Vires Rd Lodi Wp00435837 Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 43.9 mg/L 01/16/2024 13:00 ac 2340B 01/16/2024 16:54 ac Calcium 11 1 mg/L 1 01/16/2024 13:00 ac EPA 200.7 01/16/2024 16:54 ac Magnesium 4 1 mg/L 1 01/16/2024 13:00 ac EPA 200.7 01/16/2024 16:54 ac Potassium 2 1 mg/L 1 01/16/2024 13:00 ac EPA 200.7 01/16/2024 16:54 ac Sodium 37 1 mg/L 1 01/16/2024 13:00 ac EPA 200.7 01/16/2024 16:54 ac Total Cations 2.5 1 meq/L 01/16/2024 13:00 ac Calc. 01/16/2024 16:54 ac Boron 0.2 0.1 mg/L 1 01/16/2024 13:00 ac EPA 200.7 01/16/2024 16:54 ac Copper 510 10 ug/L 1000, 1 01/16/2024 13:00 ac EPA 200.7 01/16/2024 16:54 ac Iron 30 30 ug/L 300, 1 01/16/2024 13:00 ac EPA 200.7 01/16/2024 16:54 ac Manganese 146 0.5 ug/L 50, 1 01/17/2024 09:00 ac EPA 200.8 01/17/2024 10:47 ac Zinc 10 10 ug/L 5000 1 01/17/2024 09:00 ac EPA 200.8 01/17/2024 10:47 ac SAR 2.4 mg/L 01/16/2024 13:00 ac Calc. 01/16/2024 16:54 ac Total Alkalinity(as CaCO3) 120 10 mg/L 1 01/23/2024 16:06 amm SM 4500-11+13 01/24/2024 03:41 amm Hydroxide as OH ND 10 mg/L 1 U 01/23/2024 16:06 amm SM 4500-H+B 01/24/2024 03:41 amm Carbonate as CO3 ND 10 mg/L 1 U 01/23/2024 16:06 amm SM 4500-11+13 01/24/2024 03:41 amm Bicarbonate as HCO3 150 10 mg/L 1 01/23/2024 16:06 amm SM 4500-H+B 01/24/2024 03:41 amm Sulfate 2.6 0.5 mg/L 500, 1 01/26/2024 15:46 ldm EPA 300.0 01/26/2024 17:40 ldm Chloride 6 1 mg/L 500, 1 01/26/2024 15:46 ldm EPA 300.0 01/26/2024 17:40 ldm Nitrate as NO3 ND 0.4 mg/L 45 1 U 01/15/2024 14:30 Up SM 4500-NO3 F 01/15/2024 15:12 ilp Nitrite as N ND 0.1 mg/L 1 1 U 01/13/2024 21:00 amm SM 4500-NO2 B 01/13/2024 22:07 amm Nitrate+Nitrite as N ND 0.4 mg/L 10 1 U 01/15/2024 14:30 Up SM 4500-NO3 F 01/15/2024 15:12 ilp Fluoride 0.1 0.1 mg/L 2 1 01/26/2024 15:46 ldm EPA 300.0 01/26/2024 17:40 ldm Total Anions 2.7 0.4 meq/L 01/26/2024 15:46 ldm Calc. 01/26/2024 17:40 ldm pH 7.60 --- units 1 01/12/2024 10:40 na SM 4500-H+B 01/12/2024 10:40 na Specific Conductance 251 1 umhos/cm 16001 1 01/23/2024 16:06 amm SM 4500-H+B 01/24/2024 03:41 amm Total Dissolved Solids 210 20 mg/L 10001 1 01/16/2024 14:00 ctl SM 2540 C 01/17/2024 10:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 01/13/2024 19:00 amm SM 5540 C 01/13/2024 19:10 amm Aggressiveness Index 11.1 --- --- 01/16/2024 13:00 ac Calc. 01/16/2024 16:54 ac Langelier Index(20°C) -0.7 --- --- 01/16/2024 13:00 ac Calc. 01/16/2024 16:54 ac Nitrate Nitrogen ND 0.4 mg/L 10 1 U 01/15/2024 14:30 Up SM 4500-NO3 F 01/15/2024 15:12 ilp Metals,Total Arsenic 21 1 ug/L 10 1 h 01/17/2024 09:00 ac EPA 200.8 01/17/2024 10:47 ac DQF Flags Definition: U Constituent results were non-detect. h The MS/MSD did not meet QC criteria. 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