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.O `AGRICULTURAL Analytical Chemists June 5, 2023 Lab No. : STK2336794-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 25, 2023 at 11:40 1868 East Hazelton Ave. Sampled By : Aaron Gooderham Stockton, CA 95205 Received On : May 25, 2023 at 12:05 Description : Wellhead Matrix : Drinking Water Project 2989 Tangeman Road Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 91.0 2.5 mg/L 1 05/30/2023 10:00 ac 2340B 05/30/2023 17:54 ac Calcium 20 1 mg/L 1 05/30/2023 10:00 ac EPA 200.7 05/30/2023 17:54 ac Magnesium 10 1 mg/L 1 05/30/2023 10:00 ac EPA 200.7 05/30/2023 17:54 ac Potassium 4 1 mg/L 1 05/30/2023 10:00 ac EPA 200.7 05/30/2023 17:54 ac Sodium 16 1 mg/L 1 05/30/2023 10:00 ac EPA 200.7 05/30/2023 17:54 ac Total Cations 2.6 --- meq/L 1 05/30/2023 10:00 ac Calc. 05/30/2023 17:54 ac Boron ND 0.1 mg/L 1 U 05/30/2023 10:00 ac EPA 200.7 05/30/2023 17:54 ac Copper ND 10 ug/L 10002 1 U 05/30/2023 10:00 ac EPA 200.7 05/30/2023 17:54 ac Iron ND 30 ug/L 3002 1 U 05/30/2023 10:00 ac EPA 200.7 05/30/2023 17:54 ac Manganese ND 10 ug/L 502 1 U 05/30/2023 10:00 ac EPA 200.7 05/30/2023 17:54 ac Zinc ND 20 ug/L 1 U 05/30/2023 10:00 ac EPA 200.7 05/30/2023 17:54 ac SAR 0.7 0.1 1 05/30/2023 10:00 ac Calc. 05/30/2023 17:54 ac Total Alkalinity(as CaCO3) 120 10 mg/L 1 05/30/2023 13:44 amm SM 4500-H+B 05/31/2023 04:20 amm Hydroxide as OH ND 10 mg/L 1 U 05/30/2023 13:44 amm SM 4500-H+B 05/31/2023 04:20 amm Carbonate as CO3 ND 10 mg/L 1 U 05/30/2023 13:44 amm SM 4500-H+B 05/31/2023 04:20 amm Bicarbonate as HCO3 140 10 mg/L 1 05/30/2023 13:44 amm SM 4500-H+B 05/31/2023 04:20 amm Sulfate 2.5 0.5 mg/L 5002 1 05/26/2023 15:13 ldm EPA 300.0 05/27/2023 11:06 ldm Chloride 4 1 mg/L 5002 1 b 05/26/2023 15:13 ldm EPA 300.0 05/27/2023 11:06 ldm Nitrate as NO3 5.3 0.4 mg/L 45 1 b 05/26/2023 15:13 ldm EPA 300.0 05/27/2023 11:06 ldm Nitrite as N ND 0.1 mg/L 1 1 Jb 05/26/2023 15:13 ldm EPA 300.0 05/27/2023 11:06 ldm Nitrate+Nitrite as N 1.2 0.1 mg/L 10 1 b 05/26/2023 15:13 ldm EPA 300.0 05/27/2023 11:06 ldm Fluoride 0.1 0.1 mg/L 2 1 05/26/2023 15:13 ldm EPA 300.0 05/27/2023 11:06 ldm Total Anions 2.6 --- meq/L 1 bJ 05/30/2023 13:44 amm Calc. 05/31/2023 04:20 amm pH 7.6 --- units 1 05/25/2023 11:40 ag SM 4500-H+B 05/25/2023 11:40 ag Specific Conductance 250 1 umhos/cm 16002 1 05/30/2023 13:44 amm SM 4500-H+B 05/31/2023 04:20 amm Total Dissolved Solids 210 20 mg/L 10002 1 05/26/2023 17:50 ctl SM 2540 C 05/30/2023 11:15 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 05/26/2023 15:36 krh SM 5540 C 05/26/2023 15:56 krh Aggressiveness Index 11.4 1 1 05/25/2023 11:40 ag Calc. 05/25/2023 11:40 ag Langelier Index(20°C) -0.4 1 1 05/25/2023 11:40 ag Calc. 05/25/2023 11:40 ag Nitrate Nitrogen 1.2 0.1 mg/L 10 1 b 05/26/2023 15:13 ldm EPA 300.0 05/27/2023 11:06 ldm DQF Flags Definition: U Constituent results were non-detect. b The Blank was positive for constituent but less than the PQL J Reported value is estimated;detected at a concentration below the RL 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 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