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ENVIRONMENTALFGL Analytical Uiemists December 17, 2025 Lab No. : STK2558219-002 Luhdorff&Scalmanini, Consulting Eng. Customer No.: 3012023 Attn:Jeanette Lovelis 500 First Street Sampled On : December 1, 2025 at 10:45 Woodland, CA 95695 Sampled By : Nate Plascencia Received On : December 1, 2025 at 14:05 Description Brown's New Matrix : Drinking Water Project Water Monitoring Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 260 2.5 mg/L 12/02/2025 12:58 ac Calc. 12/02/2025 18:03 ac Calcium 68 1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 18:03 ac Magnesium 22 1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 18:03 ac Potassium 2 1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 18:03 ac Sodium 76 1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 18:03 ac Total Cations 8.6 1 meq/L 12/02/2025 12:58 ac - 12/02/2025 18:03 ac Boron 1.0 0.1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 18:03 ac Copper ND 10 ug/L 10002 1 U 12/02/2025 12:58 ac EPA 200.7 12/02/2025 18:03 ac Iron ND 30 ug/L 3002 1 U 12/02/2025 12:58 ac EPA 200.7 12/02/2025 18:03 ac Manganese ND 10 ug/L 50' 1 U 12/02/2025 12:58 ac EPA 200.7 12/02/2025 18:03 ac Zinc ND 20 ug/L 5000 1 U 12/02/2025 12:58 ac EPA 200.7 12/02/2025 18:03 ac Total Alkalinity(as CaCO3) 190 10 mg/L 1 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:21 amm Hydroxide as OH ND 10 mg/L 1 U 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:21 amm Carbonate as CO3 ND 10 mg/L 1 U 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:21 amm Bicarbonate as HCO3 230 10 mg/L 1 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:21 amm Sulfate 192 0.5 mg/L 5002 1 b 12/03/2025 11:44 ldm EPA 300.0 12/03/2025 22:47 ldm Chloride 42 1 mg/L 5002 1 b 12/03/2025 11:44 ldm EPA 300.0 12/03/2025 22:47 ldm Nitrate as NO3 10.5 0.4 mg/L 45 1 12/02/2025 11:50 mml SM 4500-NO3 F 12/02/2025 13:21 mml Nitrite as N ND 0.2 mg/L 1 1 U 12/02/2025 11:50 mml SM 4500-NO3 F 12/02/2025 13:20 mml Nitrate+Nitrite as N 2.4 0.4 mg/L 10 1 12/02/2025 11:50 mml SM 4500-NO3 F 12/02/2025 13:21 mini Fluoride 0.2 0.1 mg/L 2 1 12/03/2025 11:44 ldm EPA 300.0 12/03/2025 22:47 ldm Total Anions 9.1 10 meq/L 12/03/2025 11:44 ldm _ 12/03/2025 22:47 ldm pH 7.3 --- units 1 12/01/2025 10:45 np SM 4500-H+B 12/01/2025 10:45 np Specific Conductance 855 1 umhos/cm 16001 1 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:21 amm Total Dissolved Solids 560 20 mg/L 10001 1 12/03/2025 11:00 ctl SM 2540 C 12/04/2025 11:40 ctl Total Dissolved Solids(sum) 643 10 mg/L 12/02/2025 12:58 ac Calc. 12/02/2025 18:03 ac MBAs,Calc.as LAS,MW 320 ND 0.1 mg/L 0.51 1 U 12/02/2025 15:40 mct SM 5540 C 12/02/2025 18:37 mct Aggressiveness Index 11.8 10 --- 12/02/2025 12:58 ac Calc. 12/02/2025 18:03 ac Langelier Index(20°C) -0.06 20 - 12/02/2025 12:58 ac Calc. 12/02/2025 18:03 ac Nitrate Nitrogen 2.4 0.4 mg/L 10 1 12/02/2025 11:50 mml SM 4500-NO3 F 12/02/2025 13:21 mml DQF Flags Definition: U Constituent results were non-detect. b The Blank was positive for constituent but less than the PQL 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 4 of 17 Page 4 of 17 Corporate Offices 3 Laboratory Office 3 Laboratory Office 3 Laboratory Office 3 Laboratory Office 3 Laboratory 853 Corporation Street 2500 Stagecoach Road 563 E.Lindo 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