COMPLIANCE INFO_Q3 2025 MONITORING REPORT 10-30-25

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Table 3bSummary of Analytical Results for Groundwater Monitoring Well Network - Intermediate ZoneForward Landfill Quarterly Monitoring Report – Third Quarter 2025 9999 South Austin Road San Joaquin County, CaliforniaField ParameterspH SUSpecific Conductance μS/cmTemperature°CTurbidity NTUMonitoring Parameters – RoutineBicarbonate Alkalinity mg/LCalcium, Dissolved mg/LCarbonate Alkalinity mg/LChloride mg/LMagnesium, Dissolved mg/LNitrate as Nitrogen mg/LPotassium, Dissolved mg/LSodium, Dissolved mg/LStrontium, Dissolved mg/LSulfate mg/LTotal Dissolved Solids mg/L1,2,3-Trichloropropane by SRL 524M1,2,3-Trichloropropaneμg/LVOCs by USEPA Method 82601,1-Dichloroethane μg/L1,1-Dichloroetheneμg/L1,2-Dichloroethaneμg/LBromodichloromethaneμg/LCarbon Tetrachlorideμg/LCFC-11μg/LCFC-12μg/LChloroformμg/Lcis-1,2-Dichloroethene μg/LTetrachloroetheneμg/LToluene μg/LTrichloroethene μg/LAnalyteUnitAMW-31AMW-32S AMW-32 AMW-35 AMW-40M AMW-41M AMW-42M AMW-43M AMW-50M AMW-51M AMW-52M AMW-56 AMW-57M AMW-58M AMW-59M AMW-60M AMW-61MCDCR-EW-2 CDCR-EW-3 CDCR-EW-4CDCR-EW-58/1/2025 7/31/2025 7/31/2025 8/6/2025 7/29/2025 7/29/2025 7/29/2025 7/29/2025 8/8/2025 8/8/2025 8/8/2025 8/6/2025 8/4/2025 8/7/2025 8/7/20258/7/2025 8/8/2025 8/8/2025 8/8/2025 8/7/2025 8/8/20257.34 7.54 7.52 7.53 7.41 7.3 7.73 7.58 7.49 7.52 7.55 7.34 7.45 7.52 7.5 7.41 7.5 7.7 7.52 7.39 7.4 976 1347 1199 939 695 665 244 536 978 870 809 683 527 779 554 921 870 777 972 775 1037 18.4 18.6 18.7 19.6 17 16 16.2 16.2 19.8 19.9 19.2 19.5 15.8 19.8 19.3 21.5 20.4 20.3 20.3 20.8 20.7 5 5 6 2 32 11 14 6 1 1 2 2 5 1 1 5 1 2 3 5 4 560 330 330 360 270 390 120 290 360 420 470 360 280 410 290 390 360 370 330 340 350 98 120 110 87 69 69 22 53 95 88 81 67 47 74 51 85 86 74 95 69 100 <2.5 <5.0 <5.0 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 26 77 72 47 32 8.1 4.4 10 95 41 13 27 11 18 10 61 59 29 110 44 130 49 56 51 46 30 29 9.7 22 51 48 43 33 24 36 25 42 47 39 51 36 53 0.086 43 37 -- 10 0.46 0.46 0.52 8.5 5.8 2.0 -- 0.67 3.9 1.2 7.8 8.8 6.2 9.1 5.3 7.69.0 7.4 7.9 7.0 6.9 5.9 2.8 4.5 8.8 6.9 7.0 6.4 4.6 6.8 6.1 6.8 6.4 11 7.2 7.3 8.2 42 68 52 38 41 54 20 42 45 42 49 32 28 42 32 44 41 44 44 39 46 1.1 1.2 1.1 0.91 0.71 0.69 0.23 0.54 1 0.97 0.88 0.72 0.51 0.79 0.52 0.88 0.93 0.81 1 0.74 1 21 150 110 51 44 17 13 23 62 45 30 27 26 43 31 55 58 51 57 46 57 605 894 764 603 448 418 195 351 598 532 494 419 363 487 361 577 537 507 609 506 613 <0.0050 <0.0050 <0.0050 0.010 <0.0050 <0.0050 <0.0050 <0.0050 0.023 0.037 0.0060 <0.0050 <0.0050 0.022 <0.0050 0.029 0.041 0.039 0.028 0.036 0.016 0.46 J<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.30 J 0.75 0.29 J 0.97 <0.50 0.41 J<0.50 0.56 0.43 J 0.65 0.30 J 0.35 J<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.75 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.50 0.37 J 0.43 J<0.50 1.4 0.38 J<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.52 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.26 J<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 17 <0.50 <0.50 <0.50 <0.50 0.56 <0.50 7.9 18 23 9.7 19 8.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.20 J 0.13 J<0.50 <0.50 <0.50 0.18 J<0.50 0.40 J 0.13 J 0.14 J<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.49 J 0.73 0.22 J<0.50 <0.50 0.80 <0.50 1.2 0.64 0.75 0.37 J<0.50 0.21 J<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 8.8 <0.50 <0.50 <0.50 <0.50 1.0 <0.50 5.1 2.4 2.7 1.6 41 5.1 0.68 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.27 J 0.23 J 0.12 J 6.7 <0.50 0.18 J<0.50 0.37 J<0.50 0.14 J<0.50 <0.50 <0.50 1.3 <0.50 <0.50 <0.50 0.19 J 0.21 J<0.50 <0.50 11 7.9 2.9 3.0 <0.50 5.9 0.84 9.3 6.8 8.5 4.4 17 4.5 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 3.2 0.94 0.68 1.2 1.2 1.8 0.61 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 6.9 2.2 0.71 2.6 <0.50 2.4 0.29 J 5.7 2.6 3.9 1.7 23 3.4 Notes:1. Only organic compounds reported above the detection limits are shown.2. Bold indicates the analyte was detected at a concentration greater than the laboratory practical quantitation limit. A bolded value with a J qualifier represents exceedance of the laboratory method detection limit.3. Nitrate as Nitrogen results are absent for monitoring wells AMW-7, AMW-35, and AMW-56 due to a clerical error made by the laboratory.Acronyms and Abbreviations:°C = degree Celsius< = the analyte was not detected at a concentration greater than laboratory practical quantitation limit-- = not applicableμg/L = microgram per literμS/cm = microSiemen per centimeter CFC-11 = trichlorofluoromethaneCFC-12 = dichlorodifluoromethanemg/L = milligram per literNTU = nephelometric turbidity unitSRL = the Department of Public Health's Sanitation and Radiation LaboratoriesSU = standard pH unitUSEPA = United States Environmental Protection AgencyVOC = volatile organic compoundQualifiers:J = Estimated concentration.Forward 3Q25 Tables 2/2