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.O `AGRICULTURAL Analytical Chemists August 4, 2022 Lab No. : STK2239886-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On :July 13, 2022 at 14:10 1868 East Hazelton Ave. Sampled By : Frank Giardi Stockton, CA 95205 Received On :July 13, 2022 at 15:13 Description : Wellhead Matrix : Drinking Water Project 10943 E ST RT 12, Lodi Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 23.2 2.5 mg/L 1 1 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Calcium 6 1 mg/L 1 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Magnesium 2 1 mg/L 1 1 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Potassium 1 1 mg/L 1 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Sodium 11 1 mg/L 1 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Total Cations 1.0 --- meq/L 1 1 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Boron ND 0.1 mg/L 1 U 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Copper 20 10 ug/L 10002 1 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Iron ND 30 ug/L 3002 1 U 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Manganese ND 10 ug/L 502 1 U 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Zinc 60 20 ug/L 1 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac SAR 1.0 0.1 1 1 07/18/2022 09:00 ac EPA 200.7 07/18/2022 14:42 ac Total Alkalinity(as CaCO3) 40 10 mg/L 1 07/24/2022 14:39 amm SM 2320 B 07/24/2022 21:45 amm Hydroxide as OH ND 10 mg/L 1 U 07/24/2022 14:39 amm SM 2320 B 07/24/2022 21:45 amm Carbonate as CO3 ND 10 mg/L 1 U 07/24/2022 14:39 amm SM 2320 B 07/24/2022 21:45 amm Bicarbonate as HCO3 50 10 mg/L 1 07/24/2022 14:39 amm SM 2320 B 07/24/2022 21:45 amm Sulfate 2.6 0.5 mg/L 5002 1 07/14/2022 14:12 njb EPA 300.0 07/14/2022 19:40 njb Chloride 2 1 mg/L 5002 1 1 07/14/2022 14:12 njb EPA 300.0 07/14/2022 19:40 njb Nitrate as NO3 0.4 0.4 mg/L 45 1 07/14/2022 14:12 njb EPA 300.0 07/14/2022 19:40 njb Nitrite as N ND 0.1 mg/L 1 1 U 07/14/2022 14:12 njb EPA 300.0 07/14/2022 19:40 njb Nitrate+Nitrite as N 0.1 0.1 mg/L 10 1 07/14/2022 14:12 njb EPA 300.0 07/14/2022 19:40 njb Fluoride 0.2 0.1 mg/L 2 1 07/14/2022 14:12 njb EPA 300.0 07/14/2022 19:40 njb Total Anions 0.9 --- meq/L 1 1 07/24/2022 14:39 amm SM 2320 B 07/24/2022 21:45 amm pH 7.1 units 1 07/13/2022 14:10 fg SM 4500-H+B 07/13/2022 14:10 fg Specific Conductance 97.9 1 umhos/cm 16002 1 07/20/2022 10:08 sta. SM 2510 B 07/20/2022 10:08 stas Total Dissolved Solids 100 20 mg/L 10002 1 b 07/18/2022 09:20 ctl SM 2540 C 07/19/2022 11:08 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 07/15/2022 09:49 jba SM 5540 C 07/15/2022 09:53 jba Aggressiveness Index 9.9 1 1 07/13/2022 14:10 fg SM 4500-H+B 07/13/2022 14:10 fg Langelier Index(20°C) -1.9 1 1 b 07/13/2022 14:10 fg SM 4500-H+B 07/13/2022 14:10 fg Nitrate Nitrogen 0.1 0.1 mg/L 10 1 07/14/2022 14:12 njb EPA 300.0 07/14/2022 19:40 njb DQF Flags Definition: 1 The MS/MSD did not meet QC criteria. 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 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.Undo 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