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ENVIRONMENTAINW. . , Analytical Chemists February 10, 2023 Lab No. : STK2331201-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On :January 25, 2023 at 11:00 1868 East Hazelton Ave. Sampled By : Francisco Garcia Rui Stockton, CA 95205 Received On :January 25, 2023 at 11:45 Description :Wellhead Matrix : Drinking Water Project :20555 N. Buck Road, Acampo, CA 95220-WP0042157 Sample Results - Inorganic • ,. General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 47.1 2.5 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Calcium 9 1 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Magnesium 6 1 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Potassium 4 1 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Sodium 12 1 mg/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Total Cations 1.6 --- meq/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Boron ND 0.1 mg/L 1 J 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Copper ND 10 ug/L 10002 1 J 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Iron ND 30 ug/L 3002 1 J 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Manganese ND 10 ug/L 502 1 U 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Zinc 1280 20 ug/L 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs SAR 0.8 0.1 1 01/27/2023 10:20 jba EPA 200.7 01/27/2023 21:56 rs Total Alkalinity(as CaCO3) 60 10 mg/L 1 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:47 amm Hydroxide as OH ND 10 mg/L 1 U 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:47 amm Carbonate as CO3 ND 10 mg/L 1 U 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:47 amm Bicarbonate as HCO3 80 10 mg/L 1 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:47 amm Sulfate 3.0 0.5 mg/L 5002 1 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:25 ldm Chloride 4 1 mg/L 5002 1 1 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:25 ldm Nitrate as NO3 1.1 0.4 mg/L 45 1 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:25 ldm Nitrite as N ND 0.1 mg/L 1 1 U 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:25 ldm Nitrate+Nitrite as N 0.2 0.1 mg/L 10 1 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:25 ldm Fluoride 0.2 0.1 mg/L 2 1 01/26/2023 13:22 1dm EPA 300.0 01/26/2023 22:25 ldm Total Anions 1.5 --- meq/L 1 1 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:47 amm pH 6.67 --- units 1 01/25/2023 11:00 fgr 01/25/2023 11:00 fgr Specific Conductance 147 1 umhos/cm 16002 1 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:47 amm Total Dissolved Solids 140 20 mg/L 10002 1 01/27/2023 11:55 ctl SM 2540 C 01/30/2023 12:36 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 01/26/2023 18:18 jba SM 5540 C 01/26/2023 18:22 jba Aggressiveness Index 9.8 1 1 01/25/2023 11:00 fgr 01/25/2023 11:00 fgr Langelier Index(20°C) -2.0 1 1 01/25/2023 11:00 fgr 01/25/2023 11:00 fgr Nitrate Nitrogen 0.2 0.1 mg/L 10 1 01/26/2023 13:22 ldm EPA 300.0 01/26/2023 22:25 ldm DQF Flags Definition: J Reported value is estimated;detected at a concentration below the RL and above the laboratory MDL. U Constituent results were non-detect. 1 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 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