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ENVIRONMENTAL --- Analytical Clicinists June 10, 2025 Lab No. : STK2537025-005 Luhdorff& Scalmanini, Consulting Eng. Customer No.: 3012023 Attn:Jeanette Lovelis 500 First Street Sampled On : May 14, 2025 at 12:50 Woodland, CA 95695 Sampled By : Nate Plascencia Received On : May 14, 2025 at 14:39 Description Hall Matrix : System Project Water Monitoring Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 196 2.5 mg/L 05/16/2025 11:00 ac Calc. 05/16/2025 22:33 ac Calcium 52 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:33 ac Magnesium 16 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:33 ac Potassium 2 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:33 ac Sodium 69 1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:33 ac Total Cations 7.0 1 meq/L 05/16/2025 11:00 ac _ 05/16/2025 22:33 ac Boron 0.4 0.1 mg/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:33 ac Copper 20 10 ug/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:33 ac Iron ND 30 ug/L 1 U 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:33 ac Manganese ND 10 ug/L 1 U 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:33 ac Zinc 60 20 ug/L 1 05/16/2025 11:00 ac EPA 200.7 05/16/2025 22:33 ac Total Alkalinity(as CaCO3) 180 10 mg/L 1 05/20/2025 20:04 amm SM 4500-H+B 05/20/2025 22:34 amm Hydroxide as OH ND 10 mg/L 1 U 05/20/2025 20:04 amm SM 4500-H+B 05/20/2025 22:34 amm Carbonate as CO3 ND 10 mg/L 1 U 05/20/2025 20:04 amm SM 4500-H+B 05/20/2025 22:34 amm Bicarbonate as HCO3 220 10 mg/L 1 05/20/2025 20:04 amm SM 4500-H+B 05/20/2025 22:34 amm Sulfate 82.6 0.5 mg/L 1 05/23/2025 10:40 ldm EPA 300.0 05/24/2025 01:41 Idm Chloride 74 1 mg/L 1 b 05/23/2025 10:40 Idm EPA 300.0 05/24/2025 01:41 ldm Nitrate as NO3 9.0 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 2.0 0.4 mg/L 1 05/15/2025 16:24 mml SM 4500-NO3 F 05/15/2025 19:14 mml Fluoride 0.3 0.1 mg/L 1 05/23/2025 10:40 Idm EPA 300.0 05/24/2025 01:41 Idm Total Anions 7.6 10 meq/L 05/23/2025 10:40 ldm _ 05/24/2025 01:41 ldm pH 8.4 --- units 1 05/14/2025 12:50 np SM 4500-H+B 05/14/2025 12:50 np Specific Conductance 718 1 umhos/cm 1 05/20/2025 20:04 amm SM 4500-H+B 05/20/2025 22:34 amm Total Dissolved Solids 440 10 mg/L 1 05/20/2025 12:15 ctl SM 2540 C 05/21/2025 12:00 ctl Total Dissolved Solids(sum) 525 10 mg/L 05/16/2025 11:00 ac Calc. 05/16/2025 22:33 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 12.8 10 --- 05/16/2025 11:00 ac Calc. 05/16/2025 22:33 ac Langelier Index(20oC) 0.9 10 --- 05/16/2025 11:00 ac Calc. 05/16/2025 22:33 ac Nitrate Nitrogen 2.0 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 11 of 21 Page 11 of 21 Corporate Offices&Laboratory Office&Laboratory Office&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,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