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ENVIRONMENTAL Analytical Chemists June 10, 2025 Lab No. : STK2537025-004 Luhdorff& Scalmanini, Consulting Eng. Customer No.: 3012023 Attn:Jeanette Lovelis 500 First Street Sampled On : May 14, 2025 at 13:12 Woodland, CA 95695 Sampled By : Nate Plascencia Received On : May 14, 2025 at 14:39 Description Faulkner Matrix : System Project Water Monitoring Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 226 2.5 mg/L 05/16/2025 11:00 ac Calc. 05/16/2025 22:26 ac Calcium 61 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:26 ac Magnesium 18 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:26 ac Potassium 1 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:26 ac Sodium 66 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:26 ac Total Cations 7.4 1 meq/L 05/16/2025 11:00 ac _ 05/16/2025 22:26 ac Boron 0.4 0.1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:26 ac Copper ND 10 ug/L 1 U 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:26 ac Iron 70 30 ug/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:26 ac Manganese ND 10 ug/L 1 U 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:26 ac Zinc 30 20 ug/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:26 ac Total Alkalinity(as CaCO3) 190 10 mg/L 1 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:34 amm Hydroxide as OH ND 10 mg/L 1 U 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:34 amm Carbonate as CO3 ND 10 mg/L 1 U 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:34 amm Bicarbonate as HCO3 230 10 mg/L 1 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:34 amm Sulfate 94.8 0.5 mg/L 1 b 05/20/2025 11:21 Idm EPA 300.0 05/21/2025 05:38 Idm Chloride 74 1 mg/L 1 b 05/20/2025 11:21 Idm EPA 300.0 05/21/2025 05:38 Idm Nitrate as NO3 11.2 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 moil 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 05:38 ldm Total Anions 8.0 10 meq/L 05/20/2025 11:21 Idm _ 05/21/2025 05:38 ldm pH 8.9 --- units 1 05/14/2025 13:12 np SM 4500-H+B 05/14/2025 13:12 np Specific Conductance 760 1 umhos/cm 1 05/18/2025 17:56 amm SM 4500-H+B 05/19/2025 08:34 amm Total Dissolved Solids 470 20 mg/L 1 05/19/2025 13:30 ctl SM 2540 C 05/20/2025 11:30 ctl Total Dissolved Solids(sum) 556 10 mg/L 05/16/2025 11:00 ac Calc. 05/16/2025 22:26 ac MBAs,Calc.as LAS,MW 320 ND 0.1 mg/L 1 U 05/15/2025 19:43 mct SM 5540 C 05/15/2025 20:20 mct Aggressiveness Index 13.4 10 --- 05/16/2025 11:00 ac Calc. 05/16/2025 22:26 ac Langelier Index(20°C) 1.5 20 --- 05/16/2025 11:00 ac Calc. 05/16/2025 22:26 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 9 of 21 Page 9 of 21 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