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ENVIRONMENTAINW. . , Analytical Chemists February 10, 2023 Lab No. : STK2331346-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On :January 31, 2023 at 10:10 1868 East Hazelton Ave. Sampled By : Francisco Garcia Rui Stockton, CA 95205 Received On :January 31, 2023 at 10:55 Description :Wellhead Matrix : Drinking Water Project :4103 E Colier Rd. Acampo CA- WP0041716 Sample Results - Inorganic • ,. General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 115 2.5 mg/L 1 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Calcium 23 1 mg/L 1 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Magnesium 14 1 mg/L 1 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Potassium 4 1 mg/L 1 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Sodium 11 1 mg/L 1 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Total Cations 2.9 --- meq/L 1 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Boron ND 0.1 mg/L 1 J 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Copper ND 10 ug/L 10002 1 J 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Iron ND 30 ug/L 3002 1 U 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Manganese ND 10 ug/L 502 1 U 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Zinc 90 20 ug/L 1 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac SAR 0.4 0.1 1 02/03/2023 08:00 ac EPA 200.7 02/03/2023 10:51 ac Total Alkalinity(as CaCO3) 100 10 mg/L 1 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:56 amm Hydroxide as OH ND 10 mg/L 1 U 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:56 amm Carbonate as CO3 ND 10 mg/L 1 U 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:56 amm Bicarbonate as HCO3 120 10 mg/L 1 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:56 amm Sulfate 6.2 0.5 mg/L 5002 1 02/01/2023 10:30 ldm EPA 300.0 02/01/2023 16:14 ldm Chloride 13 1 mg/L 5002 1 b 02/01/2023 10:30 ldm EPA 300.0 02/01/2023 16:14 ldm Nitrate as NO3 8.4 0.4 mg/L 45 1 02/01/2023 10:30 ldm EPA 300.0 02/01/2023 16:14 ldm Nitrite as N ND 0.1 mg/L 1 1 Jb 02/01/2023 10:30 ldm EPA 300.0 02/01/2023 16:14 ldm Nitrate+Nitrite as N 1.9 0.1 mg/L 10 1 02/01/2023 10:30 ldm EPA 300.0 02/01/2023 16:14 ldm Fluoride ND 0.1 mg/L 2 1 J 02/01/2023 10:30 ldm EPA 300.0 02/01/2023 16:14 ldm Total Anions 2.6 --- meq/L 1 bJ 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:56 amm pH 7.9 units 1 01/31/2023 10:10 fgr 01/31/2023 10:10 fgr Specific Conductance 265 1 umhos/cm 16002 1 02/04/2023 20:41 amm SM 4500-H+B 02/05/2023 07:56 amm Total Dissolved Solids 230 20 mg/L 10002 1 02/02/2023 11:53 ctl SM 2540 C 02/03/2023 12:52 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 02/02/2023 09:46 jba SM 5540 C 02/02/2023 09:53 jba Aggressiveness Index 11.7 1 1 01/31/2023 10:10 fgr 01/31/2023 10:10 fgr Langelier Index(20°C) -0.2 1 1 01/31/2023 10:10 fgr 01/31/2023 10:10 fgr Nitrate Nitrogen 1.9 0.1 mg/L 10 1 02/01/2023 10:30 ldm EPA 300.0 02/01/2023 16:14 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. 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