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.O `AGRICULTURAL Analytical Chemists May 31, 2024 Lab No. : STK2436559-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : May 8, 2024 at 10:15 1868 East Hazelton Ave. Sampled By : Rena Le Roy Stockton, CA 95205 Received On : May 8, 2024 at 11:36 Description : Well Head Matrix : Drinking Water Project 26684 Vine Ave Escalon ca Sample Results - Inorganic 91 _ • . General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 170 2.5 mg/L 1 05/13/2024 08:00 ac 2340B 05/13/2024 11:50 ac Calcium 37 1 mg/L 1 05/13/2024 08:00 ac EPA 200.7 05/13/2024 11:50 ac Magnesium 19 1 mg/L 1 05/13/2024 08:00 ac EPA 200.7 05/13/2024 11:50 ac Potassium 4 1 mg/L 1 05/13/2024 08:00 ac EPA 200.7 05/13/2024 11:50 ac Sodium 23 1 mg/L 1 05/13/2024 08:00 ac EPA 200.7 05/13/2024 11:50 ac Total Cations 4.5 --- meq/L 1 05/13/2024 08:00 ac Calc. 05/13/2024 11:50 ac Boron ND 0.1 mg/L 1 U 05/13/2024 08:00 ac EPA 200.7 05/13/2024 11:50 ac Copper ND 10 ug/L 10002 1 U 05/13/2024 08:00 ac EPA 200.7 05/13/2024 11:50 ac Iron ND 30 ug/L 3002 1 U 05/13/2024 08:00 ac EPA 200.7 05/13/2024 11:50 ac Manganese ND 10 ug/L 502 1 U 05/13/2024 08:00 ac EPA 200.7 05/13/2024 11:50 ac Zinc 60 20 ug/L 5000 1 05/13/2024 08:00 ac EPA 200.7 05/13/2024 11:50 ac SAR 0.8 0.1 1 05/13/2024 08:00 ac Calc. 05/13/2024 11:50 ac Total Alkalinity(as CaCO3) 140 10 mg/L 1 05/12/2024 15:37 amm SM 4500-H+B 05/13/2024 04:26 amm Hydroxide as OH ND 10 mg/L 1 U 05/12/2024 15:37 amm SM 4500-H+B 05/13/2024 04:26 amm Carbonate as CO3 ND 10 mg/L 1 U 05/12/2024 15:37 amm SM 4500-H+B 05/13/2024 04:26 amm Bicarbonate as HCO3 180 10 mg/L 1 05/12/2024 15:37 amm SM 4500-H+B 05/13/2024 04:26 amm Sulfate 37.3 0.5 mg/L 5002 1 05/09/2024 17:27 1dm EPA 300.0 05/09/2024 20:24 ldm Chloride 5 1 mg/L 5002 1 05/09/2024 17:27 ldm EPA 300.0 05/09/2024 20:24 ldm Nitrate as NO3 47.7 0.4 mg/L 45 1 1 05/09/2024 17:27 ldm EPA 300.0 05/09/2024 20:24 ldm Nitrite as N ND 0.1 mg/L 1 1 U 05/09/2024 17:27 ldm EPA 300.0 05/09/2024 20:24 ldm Nitrate+Nitrite as N 11 0.1 mg/L 10 1 1 05/09/2024 17:27 ldm EPA 300.0 05/09/2024 20:24 ldm Fluoride 0.1 0.1 mg/L 2 1 05/09/2024 17:27 ldm EPA 300.0 05/09/2024 20:24 ldm Total Anions 4.6 --- meq/L 1 05/09/2024 17:27 ldm Calc. 05/09/2024 20:24 ldm pH 7.47 --- units 1 05/08/2024 10:15 rlr SM 4500-H+B 05/08/2024 10:15 rlr Specific Conductance 441 1 umhos/cm 16002 1 05/12/2024 15:37 amm SM 4500-H+B 05/13/2024 04:26 amm Total Dissolved Solids 320 20 mg/L 10002 1 05/10/2024 16:15 ctl SM 2540 C 05/13/2024 11:00 ctl MBAS,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.52 1 U 05/09/2024 15:31 krh SM 5540 C 05/09/2024 15:42 krh Aggressiveness Index 11.6 1 1 05/08/2024 10:15 rlr Calc. 05/08/2024 10:15 rlr Langelier Index(20°C) -0.3 1 1 05/08/2024 10:15 rlr Calc. 05/08/2024 10:15 rlr Nitrate Nitrogen 10.8 0.1 mg/L 10 1 1 05/09/2024 17:27 ldm EPA 300.0 05/09/2024 20:24 ldm DQF Flags Definition: U Constituent results were non-detect. 1 The MS/MSD did not meet QC criteria. 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 8 Page 2 of 8 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