COMPLIANCE INFO_2026 - Laserfiche WebLink

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Exceedances of concentration limits are addressed by the ongoing Corrective Action Program that includes a landfill gas extraction system,a groundwater extraction and treatment system,and ongoing monitoring. Under the existing Corrective Action Program, the groundwater treatment system pumped approximately 53.8 million gallons of groundwater during first quarter 2026, removing approximately 0.82 pounds of VOCs. Proposed Additions to the MRP The following locations are not currently part of the MRP and will need to be incorporated in the next revision of the MRP: • Two pan lysimeters and sumps (pan lysimeters TS-1 and TS-2 and sumps TS-1 and TS-2) associated with WMU FU-23 are shown on Figure 4 of the enclosed report.Sumps TS-1(FU-23)and TS-2(FU-23)were added to the quarterly monitoring program in fourth quarter 2024 and pan lysimeters TS-1 (FU-23) and TS-2(FU- 23) were added to the quarterly monitoring program in second quarter 2025. These locations should be added to Tables 6 and 25 of the MRP in the next revision. • Two pan lysimeters and sumps (pan lysimeters TS-3 and TS-4 and sumps TS-3 and TS-4) associated with WMU FU-24 are shown on Figure 4 of the enclosed report.Sumps TS-3(FU-24)and TS-4(FU-24)were added to the quarterly monitoring program in fourth quarter 2024 and pan lysimeters TS-3 (FU-24) and TS-4(FU- 24) were added to the quarterly monitoring program in second quarter 2025. These locations should be added to Tables 6 and 25 of the MRP in the next revision. • Four additional groundwater extraction wells CDCR-EW-2 through CDCR-EW-S,as shown on Figure 6 of the enclosed report,were installed on the CDCR property after the issuance of the MRP.These locations were added to the quarterly monitoring program beginning in second quarter 2025 and should be included in Table 19 of the MRP in the next revision. • Pan lysimeters FU-19E and FU-19W were added to the quarterly monitoring program in second quarter 2025 and the locations should be included in Table 6 of the MRP in the next revision. Certification Statement I certify under penalty of law that I have personally examined and am familiar with the information submitted in this document and all attachments, and that based on my inquiry of those individuals immediately responsible for obtaining this information, I believe that the information is true,accurate,and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment. If you have questions or comments regarding the above information, please contact me at(209)601-2274. Kindest regards, Osvaldo Cordero Environmental Manager 2