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ENVIRONMENTALFGL Analytical December 17, 2025 Lab No. : STK2558219-001 Luhdorff& Scalmanini, Consulting Eng. Customer No.: 3012023 Attn:Jeanette Lovelis 500 First Street Sampled On : December 1, 2025 at 11:20 Woodland, CA 95695 Sampled By : Nate Plascencia Received On : December 1, 2025 at 14:05 Description Granite #5 Matrix : System Project Water Monitoring Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 285 2.5 mg/L 12/02/2025 12:58 ac Calc. 12/02/2025 17:56 ac Calcium 73 1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 17:56 ac Magnesium 25 1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 17:56 ac Potassium 2 1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 17:56 ac Sodium 83 1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 17:56 ac Total Cations 9.4 1 meq/L 12/02/2025 12:58 ac _ 12/02/2025 17:56 ac Boron 1.1 0.1 mg/L 1 12/02/2025 12:58 ac EPA 200.7 12/02/2025 17:56 ac Copper ND 10 ug/L 1 U 12/02/2025 12:58 ac EPA 200.7 12/02/2025 17:56 ac Iron ND 30 ug/L 1 U 12/02/2025 12:58 ac EPA 200.7 12/02/2025 17:56 ac Manganese ND 10 ug/L 1 U 12/02/2025 12:58 ac EPA 200.7 12/02/2025 17:56 ac Zinc ND 20 ug/L 1 U 12/02/2025 12:58 ac EPA 200.7 12/02/2025 17:56 ac Total Alkalinity(as CaCO3) 200 10 mg/L 1 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:01 amm Hydroxide as OH ND 10 mg/L 1 U 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:01 amm Carbonate as CO3 ND 10 mg/L 1 U 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:01 amm Bicarbonate as HCO3 240 10 mg/L 1 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:01 amm Sulfate 192 0.5 mg/L 1 b 12/03/2025 11:44 ldm EPA 300.0 12/03/2025 22:02 Idm Chloride 42 1 mg/L 1 b 12/03/2025 11:44 ldm EPA 300.0 12/03/2025 22:02 ldm Nitrate as NO3 11.3 0.4 mg/L 1 12/02/2025 11:50 mml SM 4500-NO3 F 12/02/2025 13:19 mml Nitrite as N ND 0.2 mg/L 1 U 12/02/2025 11:50 mml SM 4500-NO3 F 12/02/2025 13:17 mml Nitrate+Nitrite as N 2.6 0.4 mg/L 1 12/02/2025 11:50 mml SM 4500-NO3 F 12/02/2025 13:19 mml Fluoride 0.2 0.1 mg/L 1 12/03/2025 11:44 Idm EPA 300.0 12/03/2025 22:02 Idm Total Anions 9.3 10 meq/L 12/03/2025 11:44 ldm _ 12/03/2025 22:02 ldm pH 7.5 --- units 1 12/01/2025 11:20 np SM 4500-H+B 12/01/2025 11:20 np Specific Conductance 927 1 umhos/cm 1 12/04/2025 15:41 amm SM 4500-H+B 12/04/2025 22:01 amm Total Dissolved Solids 600 20 mg/L 1 12/03/2025 11:00 ctl SM 2540 C 12/04/2025 11:40 ctl Total Dissolved Solids(sum) 669 10 mg/L 12/02/2025 12:58 ac Calc. 12/02/2025 17:56 ac MBAs,Calc.as LAS,MW 320 ND 0.1 mg/L 1 U 12/02/2025 15:40 mct SM 5540 C 12/02/2025 18:37 mct Aggressiveness Index 12.1 10 --- 12/02/2025 12:58 ac Calc. 12/02/2025 17:56 ac Langelier Index(20°C) 0.2 20 --- 12/02/2025 12:58 ac Calc. 12/02/2025 17:56 ac Nitrate Nitrogen 2.6 0.4 mg/L 1 12/02/2025 11:50 mml SM 4500-NO3 F 12/02/2025 13:19 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 Section:Sample Results Page 2 of 17 Page 2 of 17 Corporate Offices S Laboratory Office 3 Laboratory Office 3 Laboratory Office 3 Laboratory Office 3 Laboratory B53 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