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Table 2 A ARCO D I S Groundwater Elevations Forward Landfill Quarterly Monitoring Report-First Quarter 2026 9999 South Austin Road San Joaquin County,California Well NumberiW-1 3 -13BIAMW-14 AMW-18 tAMW-18B 19BR 24SR pth to Water(feet below TOC) 9/23/13 69.40 69.53 65.04 62.14 63.13 64.39 69.92 64.73 65.79 66.41 72.91 73.28 1 70.64 1 69.92 62.50 61.42 73.74 74.53 75.38 70.75 66.03 11/8/13 68.29 67.80 63.64 59.45 61.65 63.18 69.81 63.60 64.25 65.64 73.18 72.48 70.70 70.03 60.40 59.35 -- -- -- -- -- 2/5/14 67.34 65.95 62.62 59.23 61.13 61.75 68.28 62.66 63.75 -- 71.63 71.85 69.10 68.38 60.82 61.19 4/17/14 66.83 65.05 62.36 60.06 60.88 61.00 68.09 62.93 64.03 -- 71.81 72.42 68.89 69.18 65.61 65.91 -- -- -- -- -- 6/3/14-6/4/14 -- -- -- -- -- -- -- -- -- 66.35 -- -- -- -- -- -- 65.10 65.24 -- 74.44 75.55 75.44 70.20 66.83 8/11-12/14 67.33 72.75 67.43 64.01 63.14 64.72 72.79 66.45 67.59 68.35 75.92 76.83 73.54 72.83 66.30 66.64 68.00 68.10 66.32 77.10 78.05 79.00 73.26 70.33 11/14/14 69.37 70.65 1 66.22 62.61 1 63.34 64.98 72.15 1 66.14 67.24 1 68.04 75.14 75.45 72.86 72.15 63.78 64.16 66.54 1 66.67 64.65 76.05 76.73 77.33 71.39 65.28 2/17-23/15 60.27 66.16 60.16 56.32 55.65 58.30 68.33 61.05 62.14 63.23 72.52 72.62 69.19 68.50 59.48 59.80 62.67 62.77 58.86 73.93 74.56 75.33 69.05 62.83 5/19-26/2015 69.27 68.88 65.27 61.48 62.78 64.28 70.68 64.78 65.89 66.59 74.13 74.32 71.45 70.75 63.33 63.68 65.35 65.47 63.55 74.36 74.92 75.43 71.02 68.02 8/19/2015-9/3/2015 74.95 73.90 71.07 67.43 68.64 70.37 75.62 70.27 71.34 72.04 78.69 79.28 76.34 75.55 68.65 69.02 70.45 70.58 69.53 79.46 80.43 81.16 75.30 71.47 10/28/2015 74.53 DRY 70.03 65.75 68.20 69.53 76.00 69.92 71.00 71.98 DRY 79.21 76.58 75.88 67.12 67.49 67.72 79.26 79.84 80.34 74.86 11/16/2015-12/15/2015 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 68.64 68.80 -- -- -- 67.98 2/4-17/2016 59.30 67.57 59.77 54.51 54.52 57.70 69.96 60.86 62.39 63.35 75.73 75.98 70.85 70.20 59.89 60.25 64.20 64.28 54.90 77.75 78.23 79.03 72.53 65.67 5/2-16/16 60.60 63.78 58.46 54.21 55.20 56.54 66.87 1 59.13 60.24 61.27 72.26 72.53 67.88 67.26 57.88 58.22 61.66 61.79 74.94 75.60 77.03 70.68 64.65 8/8/16-8/10/16 72.43 73.60 69.40 65.93 66.31 67.54 75.25 68.40 69.53 70.55 85.19 76.20 77.15 67.65 68.00 68.95 69.10 79.71 80.25 79.90 75.02 71.86 10/26/2016-11/8/2016 74.51 70.01 65.50 68.09 69.66 76.51 69.92 71.01 72.12 79.90 77.24 78.06 66.88 67.29 69.52 69.64 80.04 80.60 80.86 74.80 68.59 11/14/2016 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 2/27/2017 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 5/23-30/17 57.00 59.28 55.50 51.18 53.74 53.86 63.13 55.32 56.41 57.58 68.79 69.03 64.11 65.03 57.07 57.35 57.60 57.74 72.18 73.43 76.61 66.92 60.66 8/1-31/17 63.83 66.00 61.80 58.05 60.97 60.03 68.23 61.52 62.64 63.48 72.62 73.48 69.30 70.28 60.82 61.19 63.77 63.94 73.42 74.38 75.67 69.60 65.80 9/17/2017 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 11/1/17 67.03 68.16 63.12 58.60 63.14 62.51 69.34 62.95 64.02 65.28 73.07 73.25 70.10 70.90 59.92 60.32 63.04 63.16 74.30 75.06 76.29 69.21 62.46 2/5/18-2/8/18 65.11 65.66 60.98 56.47 61.29 60.52 67.91 61.20 62.29 63.55 72.02 72.11 68.70 69.52 58.04 58.45 61.50 61.63 73.51 74.06 74.86 67.57 61.15 4/30/18-5/18/18 62.49 63.65 59.28 54.57 58.86 68.42 59.69 64.35 62.39 74.12 80.18 69.75 70.76 56.74 57.14 63.60 63.75 73.51 74.16 73.97 66.76 61.19 8/1/18-10/18 70.21 71.44 67.22 65.62 66.85 65.20 71.52 66.65 69.10 67.59 75.65 75.94 72.34 73.09 68.27 68.59 67.12 67.26 77.10 77.85 79.15 71.53 67.78 9/13-21/18 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 10/31/18-11/26/18 71.02 72.18 66.83 62.46 66.36 73.66 66.86 69.27 69.12 77.87 77.83 74.49 75.33 63.74 64.17 66.94 67.06 79.02 79.48 79.95 72.22 65.88 12/2/2018 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 1/10/2019 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 1/30/19-2/26/19 59.66 67.36 60.05 55.8 57.97 69.99 61.54 63.94 64.1 75.14 74.94 70.95 71.83 59.51 59.93 63.58 63.70 76.62 77.12 77.68 70.14 63.51 3/15-20/2019 -- -- -- -- -- -- -- -- -- 71.51 -- -- -- -- -- -- -- - 5/13/19;5/20/19;6/4/19 59.90 62.28 57.37 52.62 56.84 65.69 57.08 59.50 60.04 71.35 77.16 66.8 67.80 54.31 54.71 58.97 59.17 65.78 66.18 68.30 73.41 74.11 74.42 66.78 61.17 8/5/2019;8/8/19;8/16/19;8/26/19 65.14 67.68 62.91 59.02 60.95 70.07 63.03 65.46 65.12 74.66 75.00 71.01 71.84 61.85 62.21 63.78 63.92 70.22 70.52 72.75 75.09 75.64 75.82 69.17 65.34 11/18/19;11/21/19;11/25/19 66.53 68.48 62.78 58.18 61.55 69.58 62.67 65.06 65.08 73.42 73.73 70.40 70.74 59.52 59.91 62.92 63.08 69.36 69.65 70.79 74.93 75.54 76.35 68.78 62.30 1/23/20;1/28/20;2/4/20 63.57 65.35 59.82 55.75 58.55 67.76 60.40 61.83 62.75 72.28 72.48 68.65 69.06 57.77 58.15 61.30 61.41 67.78 68.12 69.05 74.10 74.67 75.42 67.64 60.65 5/7/20;5/12-13/20;6/1/20;6/15/20 61.72 64.13 59.22 55.35 56.46 67.50 59.24 61.65 61.62 72.83 73.48 68.58 69.03 57.61 57.98 61.84 61.97 67.70 68.12 71.90 73.53 74.18 74.12 66.52 64.98 7/27/20;7/29/20;8/3-6/20;8/31/2020 66.15 69.18 64.08 61.13 60.88 70.26 63.88 66.32 65.43 75.23 76.07 71.15 71.55 65.21 65.53 65.08 65.21 70.33 70.76 74.26 77.33 78.32 79.48 70.68 67.33 11/2/20;11/4/20;11/6/20;11/9/20;11/12/20 69.51 71.92 66.10 61.78 64.90 73.35 65.94 68.34 68.53 77.72 77.84 74.60 74.23 63.28 63.65 66.37 66.50 73.17 73.44 74.58 78.72 79.06 78.82 71.56 65.37 1/23/21;1/27/21;1/29/21;2/2/21 68.52 70.42 64.78 60.23 64.40 72.34 64.90 67.30 67.47 76.30 76.43 73.15 73.49 61.81 62.20 65.04 65.18 72.65 72.02 71.74 77.23 77.72 77.72 70.24 63.55 4/30/21;5/5-7/21;5/10/21;5/24/21 67.42 70.05 64.51 60.27 63.50 72.70 64.35 66.78 67.05 77.84 78.00 73.68 74.05 62.80 63.20 65.20 65.34 72.35 72.64 74.75 78.32 78.32 76.94 69.80 66.84 7/23/21;7/29/21;8/3/21;8/4/21;8/5/21 69.14 73.85 67.90 64.50 65.65 74.65 67.60 70.02 69.58 78.38 82.33 75.59 76.00 67.93 68.28 68.40 68.60 74.25 74.78 77.74 78.64 79.20 78.72 72.52 69.30 11/1/21;11/9/21;11/10/21;12/10/21 70.12 68.00 63.77 66.50 75.52 67.73 70.15 70.48 79.14 79.33 76.29 76.65 65.77 66.15 68.10 68.28 74.70 74.95 75.87 79.70 80.03 79.58 72.80 66.50 1/21/22;1/27/22;1/31/22;2/1/22 65.08 70.28 63.45 59.22 61.98 72.43 63.75 66.17 66.38 77.42 77.37 73.38 73.78 61.92 62.28 65.26 65.40 71.80 72.22 73.26 78.48 78.76 78.52 71.32 65.10 5/5/22;5/10/22;5/11/22;5/12/22 68.98 72.32 66.72 62.64 64.69 74.43 66.16 68.55 68.85 78.43 81.52 75.44 75.88 64.20 64.59 66.86 67.05 73.92 74.40 77.22 78.70 79.02 78.29 78.13 66.95 7/27/22;8/2/22;8/3/22;8/4/22 75.86 73.92 71.51 71.44 79.81 72.89 75.66 74.95 86.59 84.03 80.69 81.19 73.72 74.06 73.22 73.44 79.11 79.61 82.97 82.60 82.85 81.09 75.19 73.56 10/28/22;11/4/22;11/7/22;11/9/22 79.05 75.58 71.00 74.25 82.33 74.85 77.25 77.45 85.35 85.80 83.05 83.40 71.90 72.30 74.20 74.40 80.85 81.05 82.15 84.75 84.92 83.80 77.25 72.05 1/24/23-2/22/23 45.12 54.82 49.38 41.00 39.35 70.40 56.05 58.48 59.03 83.13 82.11 72.65 73.25 51.43 51.88 61.20 61.30 74.18 73.73 74.72 82.82 83.72 82.92 75.02 60.95 5/8/23-6/14/23 49.11 55.75 48.84 41.70 46.68 61.35 48.55 50.97 53.00 69.54 69.60 62.63 63.13 43.83 44.26 54.30 54.46 61.80 62.45 64.32 74.13 74.74 75.98 65.46 58.30 7/24/23,7/31/23,8/3/23,8/4/23,8/7/23 56.20 62.72 56.80 51.30 55.70 68.00 56.60 59.05 60.24 75.05 81.15 69.40 69.90 55.25 55.60 59.62 59.80 68.05 68.90 74.25 76.10 76.75 76.92 67.55 62.55 11/2/23,11/8/23,11/9/23 62.65 66.06 59.77 54.80 58.57 68.78 59.93 62.47 62.99 73.76 73.95 69.87 70.35 56.47 56.87 60.74 60.89 68.06 68.43 69.94 75.88 76.42 77.07 67.45 59.40 1/17/24,1/19/24,1/29/24,1/30/24,1/31/24 61.70 64.72 58.57 53.95 57.00 67.74 58.80 61.47 66.30 72.63 72.76 68.50 68.89 55.55 55.97 59.15 59.28 67.04 67.41 68.56 74.75 75.19 75.63 66.35 58.92 5/2/24,5/10/24,5/13/24,5/14/24 56.30 61.44 54.12 49.45 52.35 63.48 54.32 56.73 57.24 69.24 69.34 64.55 64.85 51.59 51.92 55.98 56.12 63.31 65.18 63.74 71.57 71.95 72.23 63.49 57.40 7/26/2024 61.38 66.45 59.74 54.39 52.21 67.68 57.73 60.81 61.60 72.61 68.22 68.60 68.88 55.46 53.08 59.20 59.35 66.37 66.74 69.40 70.63 73.69 72.67 64.04 57.95 11/7/2024 64.30 67.83 60.80 55.91 59.69 68.57 60.40 62.80 63.27 72.40 72.58 69.34 69.69 57.10 57.52 59.98 60.18 67.19 67.60 68.89 73.25 73.59 73.22 65.01 58.13 1/27/2025,2/7/2025,2/8/2025,2/10/2025- 62.84 65.52 59.15 54.35 58.24 66.90 58.92 61.30 61.65 71.07 71.20 67.74 68.09 57.95 56.32 58.82 59.00 65.65 66.10 67.36 72.22 72.56 72.10 64.01 57.76 2/12/2025 5/7/2025,5/20/2025,5/22/2025,5/23/2025, 60.48 63.60 57.24 52.94 56.70 65.10 56.95 59.37 59.54 69.82 70.55 66.02 66.38 54.96 55.35 58.50 58.65 63.90 64.50 67.25 71.12 71.65 70.80 63.64 61.75 5/26/2025 7/29/2025,8/7/2025,8/8/2025 64.90 68.18 62.75 58.25 61.24 69.92 61.20 63.62 64.05 74.44 75.62 70.80 71.20 59.15 59.55 61.64 61.67 68.05 68.62 73.26 74.87 75.46 73.81 65.64 60.62 11/3/2025,11/5/2025,11/12/2025,11/17/2025, 66.35 69.70 62.70 58.12 61.95 69.85 62.20 64.60 64.93 73.24 73.55 70.60 70.90 59.25 59.68 61.34 61.48 68.25 67.72 70.24 74.20 74.70 74.65 66.45 59.60 11/21/2025 12/1/2025 12/5/2025 1/27/2026;2/2/2026;2/5/2026;2/6/2026 60.00 65.45 57.70 53.20 56.70 66.70 57.90 60.35 60.55 71.60 71.75 1 67.65 68.04 56.05 56.45 59.00 59.14 66.10 66.50 67.70 73.00 73.40 73.10 1 64.95 58.04 3/10