COMPLIANCE INFO_JTD 2/11/26 - Laserfiche WebLink

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North County Recycling Center & Sanitary Landfill Department of Public Works/Solid Waste First Semiannual 2025 Groundwater Monitoring Report ©2025 COUNTY of San Joaquin. All Rights Reserved 2 The interface between Areas 1 and 3 is composed of an anchor trench/berm at an elevation of approximately 96 feet NAVD 88. Lined Area 4 was constructed in 2003, excavated to a depth of approximately 60 feet NGVD, which is approximately 60 feet below original grade. This Area is also provided with a composite liner comprised of a GCL under a 60-mil HDPE membrane as an approved engineered alternative to the prescriptive composite liner of Title 27 and RCRA Subtitle D. In addition, a one- foot thick layer of soil with not less than 30% passing 200 sieve, compacted to not less than 90% relative density, was constructed under the composite liner. The interface between Areas 3 and 4 is a lined anchor trench/berm, raised approximately three feet above the surrounding surfaces. Area 5A containment cell was designed and constructed according to the requirements of Title 27, RCRA Subtitle D and North County’s WDR. The base and side slope liners of Area 5A were joined to the existing Area 4 base and side slope liners. The base liners of Area 4 and Area 5 were tied at Elevation 70 NAVD. The base of Area 5 transitions from Elevation 70 to 68 NAVD with a 3:1 slope, then slopes towards the west with a 2 percent cross slope. Area 5B construction was completed at the end of November 2017. The Construction Quality Assurance (CQA) report was submitted , to the Central Valley Regional Water Quality Control Board (Regional Board) on December 15, 2017 and was approved on January 16, 2018. Construction of Module 6 was completed in November 2022. Extreme winter precipitation caused heavy erosion to the slopes which had to be repaired during the spring/summer. Upon completion of repairs, a CQA report was submitted to the Regional Board for review and approval. Approval of the CQA report was received on August 17, 2023. Waste placement began in Module 6 immediately thereafter to establish a base layer to shed precipitation expected from the 2023-2024 rainy season. The County is currently placing waste in Module 6 and will resume filling Area 5B in the fall.. In preparation for future growth, the County initiated the design of Module 7 and submitted a Design Report for Module 7 for review in February 2025. Regional Board staff issued a letter of concurrence for the revised design report on July 17, 2025. The project was put out to bid and a construction is scheduled to start in August with completion in summer 2026.