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Analytical Chemists January 23, 2026 Lab No. : STK2630487-001 San Joaquin Co. Environmental Health Dep Customer No.: 3017919 Water Quality Division Attn: Scott Sanglaang Sampled On :January 12, 2026 at 09:05 1868 East Hazelton Ave. Sampled By : Rena LeRoy Stockton, CA 95205 Received On :January 12, 2026 at 09:43 Description :Wellhead Matrix : Drinking Water Project :20701 S.Murphy Rd,Ripon-AP2501865 Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 200 2.5 mg/L 01/14/2026 10:00 ac 2340B 01/14/2026 13:50 ac Calcium 49 1 mg/L 1 1 01/14/2026 10:00 ac EPA 200.7 01/14/2026 13:50 ac Magnesium 19 1 mg/L 1 01/14/2026 10:00 ac EPA 200.7 01/14/2026 13:50 ac Potassium 5 1 mg/L 1 01/14/2026 10:00 ac EPA 200.7 01/14/2026 13:50 ac Sodium 27 1 mg/L 1 01/14/2026 10:00 ac EPA 200.7 01/14/2026 13:50 ac Total Cations 5.3 meq/L 01/14/2026 10:00 ac Cale. 01/14/2026 13:50 ac Boron ND 0.1 mg/L 1 U 01/14/2026 10:00 ac EPA 200.7 01/14/2026 13:50 ac Copper ND 10 ug/L 1000' 1 U 01/14/2026 10:00 ac EPA 200.7 01/14/2026 13:50 ac Iron 50 30 ug/L 3001 1 01/14/2026 10:00 ac EPA 200.7 01/14/2026 13:50 ac Manganese ND 10 ug/L 502 1 U 01/14/2026 10:00 ac EPA 200.7 01/14/2026 13:50 ac Zinc 2790 20 ug/L 5000 1 01/14/2026 10:00 ac EPA 200.7 01/14/2026 13:50 ac SAR 0.8 - 01/14/2026 10:00 ac Calc. 01/14/2026 13:50 ac Total Alkalinity(as CaCO3) 170 10 mg/L 1 01/15/2026 15:55 amm SM 4500-H+B 01/15/2026 18:57 amm Hydroxide as OH ND 10 mg/L 1 U 01/15/2026 15:55 amm SM 4500-H+B 01/15/2026 18:57 amm Carbonate as CO3 ND 10 mg/L 1 U 01/15/2026 15:55 amm SM 4500-H+B 01/15/2026 18:57 amm Bicarbonate as HCO3 210 10 mg/L 1 01/15/2026 15:55 amm SM 4500-H+B 01/15/2026 18:57 amm Sulfate 45.3 0.5 mg/L 5002 1 01/15/2026 09:10 1dm EPA 300.0 01/15/2026 17:08 ldm Chloride 14 1 mg/L 500' 1 01/15/2026 09:10 ldm EPA 300.0 01/15/2026 17:08 ldm Nitrate as NO3 58.7 0.4 mg/L 45 1 01/13/2026 13:30 mml SM 4500-NO3 F 01/13/2026 15:25 mml Nitrite as N ND 0.2 mg/L 1 1 U 01/13/2026 13:30 mml SM 4500-NO3 F 01/13/2026 15:23 mml Nitrate+Nitrite as N 13.3 0.4 mg/L 10 1 01/13/2026 13:30 mml SM 4500-NO3 F 01/13/2026 15:25 mml Fluoride 0.1 0.1 mg/L 2 1 01/15/2026 09:10 ldm EPA 300.0 01/15/2026 17:08 ldm Total Anions 5.7 meq/L 01/15/2026 09:10 ldm Calc. 01/15/2026 17:08 ldm pH 7.5 --- units 1 01/12/2026 09:05 rl SM 4500-H+B 01/12/2026 09:05 rl Specific Conductance 547 1 umhos/cm 1600' 1 01/15/2026 15:55 amm SM 4500-H+B 01/15/2026 18:57 amm Total Dissolved Solids 360 10 mg/L 1000, 1 01/14/2026 16:00 ctl SM 2540 C 01/15/2026 12:00 ctl MBAS(Screen) Negative 0.1 mg/L 1 U 01/13/2026 19:05 mct SM 5540 C 01/13/2026 19:11 met Aggressiveness Index 11.8 10 - 01/14/2026 10:00 ac Calc. 01/14/2026 13:50 ac Langelier Index(20°C) -0.03 10 --- 01/14/2026 10:00 ac Calc. 01/14/2026 13:50 ac Nitrate Nitrogen 13.3 0.4 mg/L 10 1 01/13/2026 13:30 mml SM 4500-NO3 F 01/13/2026 15:25 mml DQF Flags Definition: 1 The MS/MSD did not meet QC criteria. U Constituent results were non-detect. ND=Non-Detected, RL=Reporting Level,Di1.=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 Empress 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