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FGL ENVIRONMENTAL Analytical Chemists June 10, 2025 Lab No. : STK2537025-001 Luhdorff& Scalmanini, Consulting Eng. Customer No.: 3012023 Attn:Jeanette Lovelis 500 First Street Sampled On : May 14, 2025 at 10:50 Woodland, CA 95695 Sampled By : Nate Plascencia Received On : May 14, 2025 at 14:39 Description Granite #5 Matrix : System Project Water Monitoring Sample Results - Inorganic —Sample AnaiNsis General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 294 2.5 mg/L 05/16/2025 11:00 ac Calc. 05/16/2025 22:07 ac Calcium 75 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:07 ac Magnesium 26 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:07 ac Potassium 2 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:07 ac Sodium 83 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:07 ac Total Cations 9.5 1 meq/L 05/16/2025 11:00 ac _ 05/16/2025 22:07 ac Boron 1.1 0.1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:07 ac Copper ND 10 ug/L 1 U 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:07 ac Iron ND 30 ug/L 1 U 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:07 ac Manganese ND 10 ug/L 1 U 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:07 ac Zinc ND 20 ug/L 1 U 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:07 ac Total Alkalinity(as CaCO3) 200 10 mg/L 1 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:02 amm Hydroxide as OH ND 10 mg/L 1 U 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:02 amm Carbonate as CO3 ND 10 mg/L 1 U 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:02 amm Bicarbonate as HCO3 250 10 mg/L 1 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:02 amm Sulfate 214 1* mg/L 2 b 05/20/2025 11:21 ldm Chloride 51 1 mg/L 1 b 05/20/2025 11:21 ldm EPA 300.0 05/21/2025 05:17 ldm Nitrate as NO3 11.0 0.4 mg/L 1 05/15/2025 16:24 mml SM 4500-NO3 F 05/15/2025 19:14 mml Nitrite as N ND 0.2 mg/L 1 U 05/15/2025 16:24 mml SM 4500-NO3 F 05/15/2025 19:15 mml Nitrate+Nitrite as N 2.5 0.4 mg/L 1 05/15/2025 16:24 mml. SM 4500-NO3 F 05/15/2025 19:14 mml Fluoride 0.2 0.1 mg/L 1 05/20/2025 11:21 ldm EPA 300.0 05/21/2025 05:17 ldm Total Anions 10.2 10 meq/L 05/20/2025 11:21 ldm _ 05/21/2025 05:17 ldm pH 8.5 — units 1 05/14/2025 10:50 np SM 4500-H+B 05/14/2025 10:50 np Specific Conductance 923 1 umhos/cm 1 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:02 amm Total Dissolved Solids 620 20 mg/L 1 05/19/2025 15:00 ctl SM 2540 C 05/20/2025 11:30 ctl Total Dissolved Solids(sum) 712 10 mg/L 05/16/2025 11:00 ac Calc. 05/16/2025 22:07 ac MBAS,Calc.as LAS,MW 320 ND 0.1 mg/L 1 U 05/15/2025 18:07 mct SM 5540 C 05/15/2025 19:24 mct Aggressiveness Index 13.1 10 --- 05/16/2025 11:00 ac Calc. 05/16/2025 22:07 ac Langelier Index(20°C) 1.2 20 -- 05/16/2025 11:00 ac Calc. 05/16/2025 22:07 ac Nitrate Nitrogen 2.5 0.4 mg/L 1 05/15/2025 16:24 mml SM 4500-NO3 F 05/15/2025 19:14 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*RL adjusted for dilution, Dil.=Dilution Section:Sample Results Page 3 of 21 Page 3 of 21 Corporate Offices 3 Laboratory Office 6 Laboratory Office 3 Laboratory Office&Laboratory Office&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,CA95926 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