COMPLIANCE INFO_2026 - Laserfiche WebLink

Home Browse Search

2025 Annual Monitoring and Maintenance Report Forward Landfill 3.1.3 Annual Survey An annual survey is conducted before August 31 to confirm that all containment structures are prepared for the pending wet season, and to ensure that the approved grading and drainage plans are consistent with the existing grading and drainage and have not deteriorated or been significantly altered to prevent from eliminating and minimizing erosion and ponding, in compliance with the requirements of the General Order(State Water Board 2020) and Technical Report(HDR 2021). If construction, maintenance, or repairs are necessary, they must be completed by October 31. In 2025, there was no evidence of areas of deficiency such as cracking or subsidence in the containment structures; therefore, no corrective action was taken. The 2025 annual survey is presented in Appendix B. 3.1.4 Major Storm Events Precipitation, diversion, and drainage facilities are inspected following a major storm event in compliance with the specifications of the General Order(State Water Board 2020) and Technical Report (HDR 2021). If any damage or repairs are noted, Forward will complete repairs within 30 days of the inspection. A major storm event is defined as a minimum of one inch of precipitation within 24 hours. No damage or repairs were conducted during 2025. 4 Detention Pond Monitoring Detention pond monitoring is conducted quarterly by Del-Tech Geotechnical Support Services (Del-Tech), located in Oakdale, California. The current monitoring network consists of one pan lysimeter and one grab sampling location (compost pond; see Figure 2), from which Del-Tech collects samples when there is sufficient liquid for sampling. If liquid is detected in the pan lysimeter during an inspection, the State Water Board will be notified within 48 hours, and a sample will be analyzed for the monitoring parameters as stipulated in Table B-1 of the MRP of the General Order(State Water Board 2020). 4.1 Sampling and Laboratory Analysis Sampling for the detention pond was conducted in accordance with the Sampling and Analysis Plan (Appendix C). During 2025, the pan lysimeter was dry. The grab sampling location was sampled in the first, second, and fourth quarters of 2025, but the location had insufficient water for sampling in the third quarter of 2025. Samples were collected by Del-Tech and submitted to Pace Analytical Environmental Services, a state-certified laboratory. During sample collection, field parameters were also measured, including specific conductance and pH, and recorded on field data sheets(Appendix D)as stipulated in Table B-1 of the MRP of the General Order(State Water Board 2020).The raw laboratory data, certificates of analyses, and chain-of-custody records related to the sampling program are provided in Appendix E. Field measurements and laboratory analytical data for the detention pond are summarized in Table 1. The laboratory analytical reports provided in Appendix E present only the analytical data required by the MRP of the General Order (State Water Board 2020). Five-year data for the detention pond constituents are provided in Appendix F. www.arcadis.com 3 Forward Landfill 2025 Annual Monitoring&Maintenance Rpt_04012026