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ENVIRONMENTA AGRICULTURAL Analytical Chemists November 18, 2025 Lab No. : STK2556994-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On : November 4, 2025 at 11:27 1868 East Hazelton Ave. Sampled By : Rena LeRoy Stockton, CA 95205 Received On : November 4, 2025 at 11:54 Description :Wellhead Matrix : Drinking Water Project :14041 E. State Hwy 120, Ripon, CA 95366-WP2500992 Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 96.9 2.5 mg/L 11/07/2025 09:00 ac 2340B 11/07/2025 18:26 ac Calcium 24 1 mg/L 1 11/07/2025 09:00 ac EPA 200.7 11/07/2025 18:26 ac Magnesium 9 1 mg/L 1 1 11/08/2025 06:00 ac EPA 200.7 11/08/2025 08:38 ac Potassium 5 1 mg/L 1 1 11/08/2025 06:00 ac EPA 200.7 11/08/2025 08:38 ac Sodium 24 1 mg/L 1 11/08/2025 06:00 ac EPA 200.7 11/08/2025 08:38 ac Total Cations 3.1 1 meq/L 11/07/2025 09:00 ac Calc. 11/07/2025 18:26 ac Boron 0.2 0.1 mg/L 1 11/07/2025 09:00 ac EPA 200.7 11/07/2025 18:26 ac Copper ND 10 ug/L 10002 1 U 11/07/2025 09:00 ac EPA 200.7 11/07/2025 18:26 ac Iron ND 30 ug/L 3002 1 U 11/07/2025 09:00 ac EPA 200.7 11/07/2025 18:26 ac Manganese ND 10 ug/L 502 1 Ul 11/08/2025 06:00 ac EPA 200.7 11/08/2025 08:38 ac Zinc ND 20 ug/L 5000 1 U 11/07/2025 09:00 ac EPA 200.7 11/07/2025 18:26 ac SAR 1.1 - 11/07/2025 09:00 ac Calc. 11/07/2025 18:26 ac Total Alkalinity(as CaCO3) 90 10 mg/L 1 11/10/2025 18:08 amm SM 4500-H+B 11/10/2025 20:21 amm Hydroxide as OH ND 10 mg/L 1 U 11/10/2025 18:08 amm SM 4500-H+B 11/10/2025 20:21 amm Carbonate as CO3 ND 10 mg/L 1 U 11/10/2025 18:08 amm SM 4500-H+B 11/10/2025 20:21 amm Bicarbonate as HCO3 110 10 mg/L 1 11/10/2025 18:08 amm SM 4500-H+B 11/10/2025 20:21 amm Sulfate 15.9 0.5 mg/L 5002 1 b 11/13/2025 08:15 ldm EPA 300.0 11/13/2025 17:41 ldm Chloride 7 1 mg/L 5002 1 b 11/13/2025 08:15 ldm EPA 300.0 11/13/2025 17:41 ldm Nitrate as NO3 24.1 0.4 mg/L 45 1 11/05/2025 14:25 mml SM 4500-NO3 F 11/05/2025 16:22 mml Nitrite as N ND 0.2 mg/L 1 1 U 11/05/2025 14:25 mml SM 4500-NO3 F 11/05/2025 16:20 mml Nitrate+Nitrite as N 5.5 0.4 mg/L 10 1 11/05/2025 14:25 mml SM 4500-NO3 F 11/05/2025 16:22 mml Fluoride 0.1 0.1 mg/L 2 1 b 11/13/2025 08:15 ldm EPA 300.0 11/13/2025 17:41 ]dm Total Anions 2.7 10 meq/L 11/13/2025 08:15 ldm Calc. 11/13/2025 17:41 Idm pH 7.7 units 1 11/04/2025 11:27 rl SM 4500-H+B 11/04/2025 11:27 rl Specific Conductance 277 1 umhos/cm 16002 1 11/10/2025 18:08 amm SM 4500-H+B 11/10/2025 20:21 amm Total Dissolved Solids 240 20 mg/L 10002 1 11/06/2025 10:30 ctl SM 2540 C 11/07/2025 10:35 ctl MBAS(Screen) Negative 0.1 mg/L 1 U 11/05/2025 18:38 met SM 5540 C 11/05/2025 18:49 met Aggressiveness Index 11.4 10 -- 11/07/2025 09:00 ac Calc. 11/07/2025 18:26 ac Langelier Index(20°C) -0.4 20 --- 11/07/2025 09:00 ac Calc. 11/07/2025 18:26 ac Nitrate Nitrogen 5.5 0.4 mg/L 10 1 11/05/2025 14:25 mml SM 4500-NO3 F 11/05/2025 16:22 mml DQF Flags Definition: 1 The MS/MSD did not meet QC criteria. U Constituent results were non-detect. b The Blank was positive for constituent but less than the PQL 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.Undo Avenue 3442 Empresa Drive,Suite D 9411 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 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