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ENVIRONMENTALFGL • . Analytical Chemists July 16, 2026 Lab No. : STK2650005-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :July 7, 2026 at 11:05 1868 East Hazelton Ave. Sampled By : Rena LeRoy Stockton, CA 95205 Received On :July 7, 2026 at 11:40 Description :Wellhead Matrix : Drinking Water Project :16890 S. Murphy Rd., Ripon- WP0044059 Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 134 2.5 mg/L 07/09/2026 10:00 ac 2340B 07/09/2026 21:05 ac Calcium 34 1 mg/L 1 1 07/09/2026 10:00 ac EPA 200.7 07/09/2026 21:05 ac Magnesium 12 1 mg/L 1 07/09/2026 10:00 ac EPA 200.7 07/09/2026 21:05 ac Potassium 5 1 mg/L 1 07/09/2026 10:00 ac EPA 200.7 07/09/2026 21:05 ac Sodium 19 1 mg/L 1 07/09/2026 10:00 ac EPA 200.7 07/09/2026 21:05 ac Total Cations 3.6 - meq/L 07/09/2026 10:00 ac Calc. 07/09/2026 21:05 ac Boron 0.1 0.1 mg/L 1 07/09/2026 10:00 ac EPA 200.7 07/09/2026 21:05 ac Copper ND 10 ug/L 10002 1 U 07/09/2026 10:00 ac EPA 200.7 07/09/2026 21:05 ac Iron ND 30 ug/L 3002 1 U 07/09/2026 10:00 ac EPA 200.7 07/09/2026 21:05 ac Manganese ND 10 ug/L 502 1 U 07/09/2026 10:00 ac EPA 200.7 07/09/2026 21:05 ac Zinc 30 20 ug/L 5000 1 07/09/2026 10:00 ac EPA 200.7 07/09/2026 21:05 ac SAR 0.7 07/09/2026 10:00 ac Calc. 07/09/2026 21:05 ac Total Alkalinity(as CaCO3) 140 10 mg/L 1 07/09/2026 19:32 amm SM 4500-H+B 07/10/2026 06:36 amm Hydroxide as OH ND 10 mg/L 1 U 07/09/2026 19:32 amm SM 4500-H+B 07/10/2026 06:36 amm Carbonate as CO3 ND 10 mg/L 1 U 07/09/2026 19:32 amm SM 4500-H+B 07/10/2026 06:36 amm Bicarbonate as HCO3 170 10 mg/L 1 07/09/2026 19:32 amm SM 4500-H+B 07/10/2026 06:36 amm Sulfate 19.4 0.5 mg/L 5002 1 b 07/10/2026 08:53 Idm EPA 300.0 07/10/2026 16:54 ldm Chloride 12 1 mg/L 5001 1 hb 07/10/2026 08:53 Idm EPA 300.0 07/10/2026 16:54 Idm Nitrate as NO3 28.8 0.4 mg/L 45 1 07/08/2026 15:50 mml SM 4500-NO3 F 07/08/2026 18:25 mml Nitrite as N ND 0.2 mg/L 1 1 U 07/08/2026 15:50 mml SM 4500-NO3 F 07/08/2026 18:23 mml Nitrate+Nitrite as N 6.5 0.4 mg/L 10 1 07/08/2026 15:50 mml SM 4500-NO3 F 07/08/2026 18:25 mml Fluoride 0.1 0.1 mg/L 2 1 07/10/2026 08:53 ldm EPA 300.0 07/10/2026 16:54 ldm Total Anions 4.0 meq/L 07/10/2026 08:53 Idm Calc. 07/10/2026 16:54 ldm pH 7.6 --- units 1 07/07/2026 11:05 rl SM 4500-H+B 07/07/2026 11:05 rl Specific Conductance 387 1 umhos/cm 16002 1 07/09/2026 19:32 amm SM 4500-H+B 07/10/2026 06:36 amm Total Dissolved Solids 260 20 mg/L 1000, 1 07/09/2026 10:45 ctl SM 2540 C 07/10/2026 10:30 cd MBAs(Screen) Negative 0.1 mg/L 1 U 07/08/2026 20:55 mct SM 5540 C 07/08/2026 21:14 mct Aggressiveness Index 11.7 10 --- 07/09/2026 10:00 ac Calc. 07/09/2026 21:05 ac Langelier Index(20°C) -0.2 20 --- 07/09/2026 10:00 ac Calc. 07/09/2026 21:05 ac Nitrate Nitrogen 6.5 0.4 mg/L 10 1 07/08/2026 15:50 mml SM 4500-NO3 F 07/08/2026 18:25 mmi DQF Flags Definition: I 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 h 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.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