COMPLIANCE INFO_Q3 2025 MONITORING REPORT 10-30-25

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Table 3aSummary of Analytical Results for Groundwater Monitoring Well Network - Shallow 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 mg/LCalcium, Dissolved mg/LCarbonate 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/L1,4-Dichlorobenzeneμg/LBromodichloromethaneug/lCarbon Tetrachlorideμg/LCFC-11μg/LCFC-12 μg/LChlorobenzeneμg/LChloroform μg/Lcis-1,2-Dichloroetheneμg/LMethyl-tert-butyletherμg/LTetrachloroetheneμg/LTolueneμg/LTrichloroethene μg/LAnalyteUnitAMW-44 AMW-45 AMW-46 AMW-47 AMW-48 AMW-49 AMW-50S AMW-51S AMW-52S AMW-54R AMW-55 AMW-57S AMW-58S AMW-59S AMW-60S AMW-61S AMW-62AMW-638/7/2025 8/7/2025 8/7/2025 8/4/2025 8/4/2025 8/4/2025 8/8/2025 8/8/2025 8/15/2025 8/6/2025 8/4/2025 8/7/2025 8/7/2025 8/7/2025 8/8/2025 8/7/2025 8/7/20257.56 7.62 7.58 7.94 7.77 7.59 7.22 7.69 -- 7.43 7.5 7.51 7.61 7.71 7.44 7.39 6.77 7.36 859 849 958 197 757 349 1531 774 -- 1074 996 470 1030 869 805 1027 1431 1242 19.2 18.9 18.8 19.5 14.2 18.6 20.3 20.7 -- 22.1 19.7 15.4 20 19.8 21.7 20.9 22.3 21.9 10 15 50 1 2 2 1 1 -- 6 1 3 2 1 5 5 5 5 380 360 320 99 230 150 470 410 --480 380 260 190 190 260 430 750 40075 80 97 21 57 26 160 72 --110 82 39 100 80 76 100 170 140 <2.5 <2.5 <2.5 <2.5 <2.5 <2.5 <5.0 <2.5 --<5.0 <2.5 <2.5 <5.0 <2.5 <2.5 <5.0 <5.0 <5.0 34 26 30 3.5 100 18 260 31 --61 78 5.6 96 130 120 92 96 71 36 32 39 8.3 25 12 81 37 --47 36 18 43 34 39 50 71 55 10 10 14 0.064 J 2.1 0.44 5.7 1.8 --7.4 -- 0.90 28 9.1 4.0 3.6 1.6 12 5.4 4.8 5.6 1.5 5.3 4.2 9.1 5.1 --6.2 6.9 4.4 5.9 5.5 5.8 7.3 6.6 5.0 52 53 46 6.9 51 27 52 59 --58 75 34 36 32 34 57 44 49 0.77 0.76 0.84 0.24 0.61 0.28 1.7 0.75 --1.1 0.82 0.4 0.94 0.76 0.79 1.1 1.6 1.1 54 73 160 8.5 24 16 35 34 --52 96 19 110 41 34 58 28 190 539 554 648 151 473 261 884 488 --692 620 340 685 547 523 629 848 813 0.0085 0.034 0.056 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 --<0.0050 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 <0.0050 <0.50 <0.50 0.19 J<0.50 <0.50 <0.50 <0.50 <0.50 --0.34 J<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.43 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 <0.50 <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 <0.50 <0.50 1.1 --<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 0.95 <0.50 --<0.50 <0.50 <0.50 0.95 0.53 0.62 0.72 0.61 0.24 J<0.50 <0.50 0.20 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 <0.50 <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 --<0.50 <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 0.57 13 --<0.50 <0.50 <0.50 0.99 <0.50 0.42 J 0.13 J 0.47 J 0.14 J<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 --3.3 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 0.40 J 1.8 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 --0.20 J<0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 1.2 1.2 2.1 <0.50 <0.50 <0.50 1.1 0.20 J--2.6 <0.50 <0.50 0.75 0.46 J 0.79 0.75 1.6 3.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 --2.6 <0.50 <0.50 <0.50 <0.50 1.8 0.98 1.8 1.3 0.23 J 0.18 J 0.63 <0.50 <0.50 <0.50 0.57 <0.50 --2.2 <0.50 <0.50 0.70 <0.50 0.45 J 0.24 J 1.4 1.4 Forward 3Q25 Tables 3/4