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Water Quality Monitoring Report <br />First Quarter 2024 <br />www.arcadis.com <br />Forward Landfill 1Q24 Water Quality Mon Report_05012024 13 <br />2.8.1 General <br />The current cannery season began in summer 2022 (when cannery wastes were first applied) and continued <br />through spring 2023 (when the crops planted to remove nitrogen were harvested). A cannery waste land <br />application area (CWLAA) monitoring report for the 2022 to 2023 cannery season was prepared in early 2024 <br />after the conclusion of the season; the report is provided in Appendix G of the Fourth Quarter Report (Arcadis <br />2024). <br />Cannery wastes were applied to the CWLAA during summer and fall 2022. Daily monitoring logs and the <br />calculated nitrogen mass loadings for the application period will be included in the CWLAA monitoring report. <br />Samples of cannery waste, soil, and wastewater were collected during the application period; the sample results <br />will also be included in the CWLAA monitoring report. <br />Winter wheat was subsequently planted in the CWLAA to remove the applied nitrogen from the cannery wastes. <br />The wheat crop continued to grow during first quarter 2023 and was cut on June 12, 2023. Soil samples were <br />collected on May 18, 2023 and land application resumed on July 24, 2023. No unusual conditions were observed <br />at the CWLAA during first quarter 2024 and no corrective actions were taken. <br />2.8.2 Cannery Waste Land Application Area Groundwater Monitoring <br />Program <br />The CWLAA monitoring network includes four wells (Table 2-5, below). Monitoring well AMW-10 was designated <br />as a CWLAA monitoring well in the MRP (RWQCB 2014) but was replaced by well AMW-31S in 2017. Under the <br />newly approved MRP (RWQCB 2024), alternative shallow groundwater monitoring wells were selected to better <br />detect levels of waste constituents. The four shallow groundwater monitoring wells are AMW-44, AMW-45, AMW- <br />46, and AMW-14. Wells AMW-44, AMW-45, and AMW-46 are considered downgradient wells and located on the <br />northern edge of the land application area. Well AMW-14 is a downgradient well located approximately 775 feet <br />northeast of the land application area. Results of the waste constituents for the alternative wells will be presented <br />in second quarter 2024. <br />Table 2-5 CWLAA Groundwater Monitoring Network <br />Well Type Well ID <br />Background AMW-1 and AMW-7 <br />FSW-1 (Forward Unit) AMW-13 and AMW-31S <br />Alternative shallow groundwater monitoring <br />wells AMW-44, AMW-45, AMW-46, and AMW-14 <br />These wells are sampled quarterly for total nitrogen, iron, manganese, and arsenic (in addition to the monitoring <br />parameters [i.e., ORP, turbidity, temperature, specific conductance, and pH] outlined in Section 2.1).