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ENVIRONMENTAINW. . , Analytical Chemists June 9, 2022 Lab No. : STK2236702-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On : May 11, 2022 at 12:26 1868 East Hazelton Ave. Sampled By : Naseem Ahmed Stockton, CA 95205 Received On : May 11, 2022 at 13:30 Description : Wellhead Matrix : Drinking Water Project 21711 Cherry Glen Ct.,Linden Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 86.1 2.5 mg/L 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Calcium 18 1 mg/L 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Magnesium 10 1 mg/L 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Potassium 5 1 mg/L 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Sodium 13 1 mg/L 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Total Cations 2.4 --- meq/L 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Boron ND 0.1 mg/L 1 U 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Copper 480 10 ug/L 10002 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Iron 60 30 ug/L 3002 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Manganese ND 10 ug/L 502 1 J 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Zinc 30 20 ug/L 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac SAR 0.6 0.1 1 05/18/2022 10:00 ac EPA 200.7 05/18/2022 18:08 ac Total Alkalinity(as CaCO3) 100 10 mg/L 1 05/23/2022 20:00 amm SM 2320 B 05/24/2022 01:59 amm Hydroxide as OH ND 10 mg/L 1 U 05/23/2022 20:00 amm SM 2320 B 05/24/2022 01:59 amm Carbonate as CO3 ND 10 mg/L 1 U 05/23/2022 20:00 amm SM 2320 B 05/24/2022 01:59 amm Bicarbonate as HCO3 120 10 mg/L 1 05/23/2022 20:00 amm SM 2320 B 05/24/2022 01:59 amm Sulfate 7.6 0.5 mg/L 5002 1 05/12/2022 13:19 njb EPA 300.0 05/12/2022 18:59 njb Chloride 6 1 mg/L 5002 1 05/12/2022 13:19 njb EPA 300.0 05/12/2022 18:59 njb Nitrate as NO3 4.1 0.4 mg/L 45 1 05/12/2022 13:19 njb EPA 300.0 05/12/2022 18:59 njb Nitrite as N ND 0.1 mg/L 1 1 J 05/12/2022 13:19 njb EPA 300.0 05/12/2022 18:59 njb Nitrate+Nitrite as N 0.9 0.1 mg/L 10 1 05/12/2022 13:19 njb EPA 300.0 05/12/2022 18:59 njb Fluoride 0.1 0.1 mg/L 2 1 05/12/2022 13:19 njb EPA 300.0 05/12/2022 18:59 njb Total Anions 2.4 --- meq/L 1 J 05/23/2022 20:00 amm SM 2320 B 05/24/2022 01:59 amm pH 6.42 --- units 1 05/11/2022 12:26 na SM 4500-H+B 05/11/2022 12:26 na Specific Conductance 243 1 umhos/cm 16002 1 05/17/2022 10:08 sta. SM 2510 B 05/17/2022 10:08 sta Total Dissolved Solids 240 20 mg/L 10002 1 05/13/2022 11:01 ctl SM 2540 C 05/16/2022 13:33 ctl MBAS(foaming agents) Negative 0.1 mg/L 0.52 1 U 05/13/2022 05:25 jba SM 5540 C 05/13/2022 05:29 jba Aggressiveness Index 10.1 1 1 05/11/2022 12:26 na SM 4500-H+B 05/11/2022 12:26 na Langelier Index(20°C) -1.8 1 1 05/11/2022 12:26 na SM 4500-H+B 05/11/2022 12:26 na Nitrate Nitrogen 0.9 0.1 mg/L 10 1 05/12/2022 13:19 njb EPA 300.0 05/12/2022 18:59 njb DQF Flags Definition: U Constituent results were non-detect. J Reported value is estimated;detected at a concentration below the PQL and above the laboratory MDL. 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 6 Page 2 of 6 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