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ENVIRONMENTA�WAGRICULTURAL Analytical Chemists September 12, 2022 Lab No. : STK2252023-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Steven Shih Sampled On :August 24, 2022 at 09:45 1868 East Hazelton Ave. Sampled By : M.Suszycki Stockton, CA 95205 Received On : August 24, 2022 at 10:40 Description Wellhead Matrix : Drinking Water Project 22519 E. Copperopolis Rd.,Linden Sample Results - Inorganic General Mineral Date Tine Who Method Date Time Who Total Hardness as CaCC3 84.4 2.5 mg/L 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac Calcium 19 1 mg/L 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac Magnesium 9 1 mg/L 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac .Potassium 5 1 mg/L 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac Sodium 35 1 mg/L 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac Total Cations 3.3 --- meq/L 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac s Boron ND 0.1 mg/L 1 J 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac Copper 30 10 ug/L 10002 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac Iron 550 30 ug/L 3002 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac Manganese 210 10 ug/L 502 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac Zinc 40 20 ug/L 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac SAR 1.7 0.1 1 08/26/2022 09:00 ac EPA 200.7 08/26/2022 12:09 ac Total Alkalinity(as CaCO3) 110 10 mg/L 1 09/03/2022 19:27 amm SM 2320 B 09/04/2022 02:48 amm Hydroxide as OH ND 10 mg/L 1 U 09/03/2022 19:27 amm SM 2320 B 09/04/2022 02:48 amm Carbonate as CO3 ND 10 mg/L 1 U 09/03/2022 19:27 amm SM 2320 B 09/04/2022 02:48 amm Bicarbonate as HCO3 130 10 mg/L 1 09/03/2022 19:27 amm SM 2320 B 09/04/2022 02:48 amm Sulfate 8.8 0.5 mg/L 5002 1 08/25/2022 10:15 Idm EPA 300.0 08/25/2022 16:22 Idm r Chloride 7 1 mg/L 5002 1 08/25/2022 10:15 Idm EPA 300.0 08/25/2022 16:22 Win % Nitrate as NO3 5.4 0.4 mg/L 45 1 08/25/2022 10:15 Idm EPA 300.0 08/25/2022 16:22 ldm Nitrite as N ND 0.1 mg/L 1 1 U 08/25/2022 10:15 Idm EPA 300.0 08/25/2022 16:22 Idm v Nitrate+Nitrite as N 1.2 0.1 mg/L 10 1 08/2512022 10:15 ]dm EPA 300.0 08/25/2022 16:22 Win Fluoride 0.1 0.1 mg/L 2 1 08/25/2022 10:15 Idm EPA 300.0 08/25/2022 16:22 Idm Total Anions 2.6 --- meq/L 1 09/03/2022 19:27 amm SM 2320 B 09/04/2022 02:48 amm r pH 7.61 - units 1 08/24/2022 09:45 m SM 4500-H+B 08/24/2022 09:45 m y Specific Conductance 279 1 umhos/cm 16002 1 08/30/2022 13:30 sta SM 2510 B 08/30/2022 13:30 sta Total Dissolved Solids 240 20 mg/L 10002 1 08/26/2022 09:21 ctl SM 2540 C 08/29/2022 10:51 ctl MBAs(foaming agents) Negative 0.1 mg/L 0.52 1 U 08/25/2022 13:51 jba SM 5540 C 08/25/2022 13:54 jba • Aggressiveness Index 11.3 1 1 08/24/2022 09:45 m SM 4500-H+B 08/24/2022 09:45 m Langelier Index(20°C) -0.5 1 1 08/24/2022 09:45 in SM 4500-H+B 08/24/2022 09:45 in Nitrate Nitrogen 1.2 0.1 mg/L 10 1 08/25/2022 10:15 Idm EPA 300.0 08/25/2022 16:22 Idm DQF Flags Definition: J Reported value is estimated;detected at a concentration below the PQL 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 o f 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