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ENVIRONMENTAINW. . , Analytical Chemists June 13, 2023 Lab No. : STK2336735-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 24, 2023 at 10:45 1868 East Hazelton Ave. Sampled By : Francisco Garcia Rui Stockton, CA 95205 Received On : May 24, 2023 at 11:19 Description :Wellhead Matrix : Drinking Water Project : 12870 CA-120 Manteca,CA WP0043695 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 260 2.5 mg/L 1 05/26/2023 08:00 ac 2340B 05/26/2023 09:16 ac Calcium 73 1 mg/L 1 05/26/2023 08:00 ac EPA 200.7 05/26/2023 09:16 ac Magnesium 19 1 mg/L 1 05/26/2023 08:00 ac EPA 200.7 05/26/2023 09:16 ac Potassium 7 1 mg/L 1 05/26/2023 08:00 ac EPA 200.7 05/26/2023 09:16 ac Sodium 29 1 mg/L 1 05/26/2023 08:00 ac EPA 200.7 05/26/2023 09:16 ac Total Cations 6.6 --- meq/L 1 05/26/2023 08:00 ac Calc. 05/26/2023 09:16 ac Boron 0.1 0.1 mg/L 1 05/26/2023 08:00 ac EPA 200.7 05/26/2023 09:16 ac Copper ND 10 ug/L 10002 1 U 05/26/2023 08:00 ac EPA 200.7 05/26/2023 09:16 ac Iron ND 30 ug/L 3002 1 U 05/26/2023 08:00 ac EPA 200.7 05/26/2023 09:16 ac Manganese ND 10 ug/L 502 1 U 05/26/2023 08:00 ac EPA 200.7 05/26/2023 09:16 ac Zinc ND 20 ug/L 1 U 05/26/2023 08:00 ac EPA 200.7 05/26/2023 09:16 ac SAR 0.8 0.1 1 05/26/2023 08:00 ac Calc. 05/26/2023 09:16 ac Total Alkalinity(as CaCO3) 190 10 mg/L 1 05/31/2023 13:15 amm SM 4500-H+B 05/31/2023 18:36 amm Hydroxide as OH ND 10 mg/L 1 U 05/31/2023 13:15 amm SM 4500-H+B 05/31/2023 18:36 amm Carbonate as CO3 ND 10 mg/L 1 U 05/31/2023 13:15 amm SM 4500-H+B 05/31/2023 18:36 amm Bicarbonate as HCO3 230 10 mg/L 1 05/31/2023 13:15 amm SM 4500-H+B 05/31/2023 18:36 amm Sulfate 51.5 0.5 mg/L 5002 1 05/25/2023 13:58 ldm EPA 300.0 05/26/2023 00:58 ldm Chloride 15 1 mg/L 5002 1 1 05/25/2023 13:58 ldm EPA 300.0 05/26/2023 00:58 ldm Nitrate as NO3 97.1 0.8* mg/L 45 2 05/25/2023 13:58 ldm EPA 300.0 05/26/2023 14:11 ldm Nitrite as N ND 0.1 mg/L 1 1 U 05/25/2023 13:58 ldm EPA 300.0 05/26/2023 00:58 ldm Nitrate+Nitrite as N 21.9 0.2* mg/L 10 2 05/25/2023 13:58 ldm EPA 300.0 05/26/2023 14:11 ldm Fluoride 0.1 0.1 mg/L 2 1 05/25/2023 13:58 ldm EPA 300.0 05/26/2023 00:58 ldm Total Anions 6.8 --- meq/L 1 1 05/31/2023 13:15 amm Calc. 05/31/2023 18:36 amm pH 7.6 units 1 05/24/2023 10:45 fgr SM 4500-H+B 05/24/2023 10:45 fgr Specific Conductance 661 1 umhos/cm 16002 1 05/31/2023 13:15 amm SM 4500-H+B 05/31/2023 18:36 amm Total Dissolved Solids 460 20 mg/L 10002 1 05/26/2023 13:15 ctl SM 2540 C 05/30/2023 11:15 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 05/25/2023 17:24 krh SM 5540 C 05/25/2023 17:39 krh Aggressiveness Index 12.1 1 1 05/24/2023 10:45 fgr Calc. 05/24/2023 10:45 fgr Langelier Index(20°C) 0.3 1 1 05/24/2023 10:45 fgr Calc. 05/24/2023 10:45 fgr Nitrate Nitrogen 21.9 0.2* mg/L 10 2 05/25/2023 13:58 ldm EPA 300.0 05/26/2023 14:11 ldm DQF Flags Definition: U Constituent results were non-detect. 1 The MS/MSD did not meet QC criteria. ND=Non-Detected, RL=Reporting Level*RL adusted for dilution, Dil.=Dilution MCL= Maximum Contamination Level. 2 - Secondary Standard. 3-CDPH Notification Level.AL= Regulatory Action Level. Section: Sample Results Page 2 of 8 Page 2 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