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ENVIRONMENTAL AGRICULTURAL Analytical Chemists June 12, 2024 Lab No. : STK2438097-001 Camp Gold Star Customer No.: 3019489 1700 Riverlake Road Discovery Bay, CA 94505 Sampled On :June 4, 2024 at 13:10 Sampled By : Frank Morgan Received On :June 4, 2024 at 14:58 Description S/T at Well Matrix : Drinking Water Project DW Monitoring Sample Results - Inorganic General Mineral Date Time Who Method Date Time Who Total Hardness as CaCO3 96.9 2.5 mg/L 06/06/2024 13:50 ac 2340B 06/06/2024 19:06 ac Calcium 24 1 mg/L 1 06/06/2024 13:50 ac EPA 200.7 06/06/2024 19:06 ac Magnesium 9 1 mg/L 1 06/06/2024 13:50 ac EPA 200.7 06/06/2024 19:06 ac Potassium 2 1 mg/L 1 06/06/2024 13:50 ac EPA 200.7 06/06/2024 19:06 ac Sodium 33 1 mg/L 1 06/06/2024 13:50 ac EPA 200.7 06/06/2024 19:06 ac Total Cations 3.4 1 meq/L 06/06/2024 13:50 ac Calc. 06/06/2024 19:06 ac Boron 0.1 0.1 mg/L 1 06/06/2024 13:50 ac EPA 200.7 06/06/2024 19:06 ac Copper ND 10 ug/L 1000, 1 U 06/06/2024 13:50 ac EPA 200.7 06/06/2024 19:06 ac Iron 11400 30 ug/L 300' 1 06/06/2024 13:50 ac EPA 200.7 06/06/2024 19:06 ac Manganese 750 10 ug/L 50' 1 06/06/2024 13:50 ac EPA 200.7 06/06/2024 19:06 ac Zinc 80 20 ug/L 5000 1 1 06/06/2024 13:50 ac EPA 200.7 06/06/2024 19:06 ac Total Alkalinity(as CaCO3) 100 10 mg/L 1 06/07/2024 18:16 amm SM 4500-H+B 06/08/2024 01:36 amen Hydroxide as OH ND 10 mg/L 1 U 06/07/2024 18:16 amm SM 4500-H+B 06/08/2024 01:36 amen Carbonate as CO3 ND 10 mg/L 1 U 06/07/2024 18:16 amm SM 4500-H+B 06/08/2024 01:36 amm Bicarbonate as HCO3 120 10 mg/L 1 06/07/2024 18:16 amm SM 4500-H+B 06/08/2024 01:36 amm Sulfate 1 0.5 mg/L 500' 1 06/11/2024 17:00 Idm EPA 300.0 06/11/2024 21:59 Idm Chloride 63 1 mg/L 500' 1 06/11/2024 17:00 Idm EPA 300.0 06/11/2024 21:59 Idm Nitrate as NO3 ND 0.4 mg/L 45 1 U 06/05/2024 19:15 ilp SM 4500-NO3 F 06/05/2024 20:19 Up Nitrite as N ND 0.2 mg/L 1 1 U 06/05/2024 19:15 Up SM 4500-NO3 F 06/05/2024 20:17 Up Nitrate+Nitrite as N ND 0.4 mg/L 10 1 U 06/05/2024 19:15 Up SM 4500-NO3 F 06/05/2024 20:19 ilp Fluoride 0.1 0.1 mg/L 2 1 06/11/2024 17:00 Idm EPA 300.0 06/11/2024 21:59 Idm Total Anions 3.8 10 meq/L 06/11/2024 17:00 Idm Calc. 06/11/2024 21:59 Idm pH 6.95 --- units 1 T 06/07/2024 18:16 amm SM 4500-H+B 06/08/2024 01:36 amm Specific Conductance 396 1 umhos/cm 16002 1 06/07/2024 18:16 amm SM 4500-H+B 06/08/2024 01:36 amm Total Dissolved Solids 250 20 mg/L 1000, 1 06/06/2024 13:30 ctl SM 2540 C 06/07/2024 12:00 ctl MBAs,Calc.as LAS,MW 320 Negative 0.1 mg/L 0.51 1 U 06/05/2024 14:29 krh SM 5540 C 06/05/2024 15:22 krh Aggressiveness Index 10.7 10 --- 06/06/2024 13:50 ac Calc. 06/06/2024 19:06 ac Langelier Index(20°C) -1.1 20 --- 06/06/2024 13:50 ac Calc. 06/06/2024 19:06 ac Nitrate Nitrogen ND 0.4 mg/L 10 1 U 06/05/2024 19:15 Up SM 4500-NO3 F 06/05/2024 20:19 ilp DQF Flags Definition: U Constituent results were non-detect. 1 The MS/MSD did not meet QC criteria. T Exceeded method/regulatory-specific holding time. ND=Non-Detected, RL=Reporting Level, Dil.=Dilution MCL= Maximum Contamination Level. 2-Secondary Standard. 3-CDPH Notification Level.AL = Regulatory Action Level. Section: Sample Results Page 3 of 8 Page 3 of 8 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 9415 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 Env FAX:(805)525-4172/Ag FAX:(805)392-2063 FAX:(209)942-0423 FAX:(530)343-3807 FAX:(805)783-2912 FAX:(559)734-8435 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