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Table 4 ARCADIS Concentration Limit Comparison Forward Landfill Quarterly Monitoring Report-First Quarter 2026 9999 South Austin Road San Joaquin County,California EME �E CL 2/2/2026 CL 1/30/2026 t1tuents _ _ _ Barium,Dissolved 0.12 NE 0.2 NE 0.11 NE 0.25 NE 0.24 �GL �2/4/202�6C�L2W/2026 �CL 0.087 �1 �387 0.1 NE 0.1 NE 0.08 NE NA NE Bicarbonate 460 632 690 945 420 1,100 430 515 450 699 300 450 330 409 360220 261 210 227 22 5551.8 380 610 Carbonate <5.0 PQL <5.0 PQL <5.0 PQL <2.5 PQL <2.5 PQL <2.5 PQL <2.5 PQL <5.0 PQL <2.5 PQL <2.5 PQL <2.5 PQL <5.0 PQL Calcium,Dissolved 110 150 130 170 92 190 100 127 79 130 75 120 84 137 110 156 42 53 40 87 47 167.1 120 160 Chloride 110 179 96 96 83 160 110 137 24 58 23 78 39 91 59 96 3.3 12.95 2.9 11.9 34 71.3 130 130 Magnesium,Dissolved 50 75 69 89 40 96 45 61 37 66 33 52 31 58 45 63.02 15 28 15 46 20 63.0 53 65.5 Nitrate as Nitrogen 8.8 9.1 0.70 18 8.4 8.8 6.6 9.0 1.2 17 8.2 19 23 49 21 62 0.41 4.825 0.38 2.9 1.2 40.0 12 30.1 H,Field 7.42 6.41-8.18 6.93 6.02-7.69 7.05 6.16-7.70 7.5 6.47-8.33 7.98 1 6.58-8.13 8.12 6.86-8.40 7.39 6.25-8.94 7.89 6.55-8.06 8.24 7.11-8.43 8.10 7.51-8.06 8.00 6.70-8.28 7.39 6.55-8.07 Potassium,Dissolved 7.7 17 8.0 10 6.6 11 8.2 9.7 6.0 12 5.6 37 3.3 5.3 6.1 8.0 2.2 1 4.4 2.6 6.2 5.9 11.4 7.9 9.72 Sodium,Dissolved 66 96 99 110 47 91 58 79 40 63 46 59 48 91 63 1 110 12 16.7 1 14 30 38 1 83.1 73 90.4 Strontium,Dissolved 1.2 1.6 1.3 2.0 0.91 2.2 1.1 1.5 0.88 1.4 0.76 1.2 0.78 1.3 1.1 1.4 0.44 0.56 0.43 1.2 0.47 1.11 1.1 1.88 Sulfate 63 70 35 160 65 84 51 84 25 140 89 200 68 310 130 220 9.4 45 8.4 28 26 164 70 180 Total Dissolved Solids 695 1,011 720 1,197 652 T8 1,200 672 839 506 785 537 830 644 T8 1,100 793 940 267 353 249 318 359 1,145 660 1,025 Organic Constituents(VOCs by USEPA Method 8260) 1,1-DichIoroethane <0.50 MDL 0.36 J I MDL <0.50 MDL <0.50 1 MDL I <0.50 I MDL <0.50 MDL 1 <0.50 1 MDL <0.50 MDL <0.50 MDL <0.50 MDL <0.50 MDL <0.50 MDL MDL .15J <0.50 <0.50 0.50 <0.50MDL <0.50 cis- <0.50 MDL <0.50 MDL <0.50 MDL <0.50 MDL <0.50 MDL Notes: 1.All concentrations are presented in milligrams per liter except pH. 2.The CLs were recalculated in fourth quarter 2024 using data through third quarter 2024. 3.If VOC detections occur,the CL indicated for VOCs will be the laboratory method detection limit. 4.Wells presented in this table are detection and upgradient program wells listed in MRP Table 1(RWQCB 2024). 5.Barium concentration limits will be established in fourth quarter 2026. 6.Yellow highlighting indicates the concentration exceeds the CL. Acronyms and Abbreviations: <=not detected at or less than the laboratory practical quantitation limit CL=concentration limit MDL=method detection limit MRP=monitoring and reporting program NA=not analyzed ND=not detected NE=not established PQL=practical quantitation limit RWQCB=Central Valley Regional Water Quality Control Board USEPA=United States Environmental Protection Agency VOC=volatile organic compound Qualifier: T8=Sample(s)received past/too close to holding time expiration. J=Estimated concentration. Reference: RWQCB.2024.Waste Discharge Requirements(WDR)and Monitoring and Reporting Program(MRP)Order No.R5-2024-0002-Forward Inc.and Republic Services,Inc.-Forward Landfill,San Joaquin County,GeoTracker No:1-10008827999.February 16. 1/1