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ENVIRONMENTAINW. . , Analytical Chemists February 10, 2023 Lab No. : STK2330636-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On :January 13, 2023 at 08:50 1868 East Hazelton Ave. Sampled By : Francisco Garcia Rui Stockton, CA 95205 Received On :January 13, 2023 at 09:54 Description Wellhead Matrix : Drinking Water Project 18383 Collier Rd.,Clements 95227 Sample Results - Inorganic Sample AnalysisGeneral Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 103 2.5 mg/L 1 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Calcium 23 1 mg/L 1 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Magnesium 11 1 mg/L 1 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Potassium 6 1 mg/L 1 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Sodium 10 1 mg/L 1 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Total Cations 2.6 --- meq/L 1 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Boron ND 0.1 mg/L 1 J 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Copper ND 10 ug/L 1000, 1 J 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Iron ND 30 ug/L 300, 1 J 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Manganese ND 10 ug/L 50, 1 U 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Zinc 20 20 ug/L 1 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs SAR 0.4 0.1 1 01/18/2023 12:57 jba EPA 200.7 01/18/2023 20:05 rs Total Alkalinity(as CaCO3) 120 10 mg/L 1 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 21:39 sta Hydroxide as OH ND 10 mg/L 1 U 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 21:39 sta Carbonate as CO3 ND 10 mg/L 1 U 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 21:39 sta Bicarbonate as HCO3 140 10 mg/L 1 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 21:39 sta Sulfate 7.9 0.5 mg/L 500, 1 01/17/2023 12:10 ldm EPA 300.0 01/17/2023 15:34 ldm Chloride 3 1 mg/L 500, 1 01/17/2023 12:10 ldm EPA 300.0 01/17/2023 15:34 Idm Nitrate as NO3 5.0 0.4 mg/L 45 1 01/19/2023 11:30 Ifs SM 4500-NO3 F 01/19/2023 13:09 Ifs Nitrite as N ND 0.1 mg/L 1 1 U 01/14/2023 20:35 amm SM 4500-NO2 B 01/14/2023 21:28 amm Nitrate+Nitrite as N 1.1 0.4 mg/L 10 1 01/19/2023 11:30 Ifs SM 4500-NO3 F 01/19/2023 13:09 Ifs Fluoride ND 0.1 mg/L 2 1 J 01/17/2023 12:10 ldm EPA 300.0 01/17/2023 15:34 Idm Total Anions 2.6 --- meq/L 1 J 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 21:39 sta pH 7.21 --- units 1 01/13/2023 08:50 fgr 01/13/2023 08:50 fgr Specific Conductance 259 1 umhos/cm 16001 1 01/18/2023 15:24 amm SM 4500-H+B 01/18/2023 21:39 sta Total Dissolved Solids 180 20 mg/L 10001 1 01/18/2023 12:11 ctl SM 2540 C 01/19/2023 12:34 ctl MBAS(foaming agents) ND 0.1 mg/L 0.52 1 U 01/14/2023 17:50 amm SM 5540 C 01/14/2023 18:42 amm Aggressiveness Index 11.0 1 1 01/13/2023 08:50 fgr 01/13/2023 08:50 fgr Langelier Index(20°C) -0.8 1 1 01/13/2023 08:50 fgr 01/13/2023 08:50 fgr Nitrate Nitrogen 1.1 0.4 mg/L 10 1 01/19/2023 11:30 Ifs SM 4500-NO3 F 01/19/2023 13:09 Ifs 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. 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.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