Fresno Sanitary Landfill East Slope Drainage Regrading And Landfill Gas Collection System Upgrades

This contract involves comprehensive site work at the Fresno Sanitary Landfill, focusing on drainage regrading and upgrades to the landfill gas collection system. Key tasks include removing existing vegetation and materials in designated repair areas, regrading low spots on the perimeter access road and side slopes caused by surface settling, and resetting HDPE drain pipes along with rat screens. The project also entails repairing exposed LLDPE liners by installing new liners, installing aggregate and riprap in regraded areas and stormwater structures, and implementing hydroseeding with temporary irrigation to ensure proper vegetation establishment. Additionally, the work involves removing and replacing malfunctioning condensate sumps and utilities, capping and abandoning certain landfill gas piping, and installing a new HDPE landfill gas header system. The scope further includes replacing vault boxes and isolation valves, as well as regrading and installing riprap from stormwater structures to improve drainage. Coordination with City staff may be necessary for flare shutdowns and startups, which could involve handling hazardous or explosive gases, emphasizing safety considerations throughout the project. The contract value is estimated between 2 million and 5 million dollars, with a response deadline of October 1, 2024, and the primary contact being Kristine Longoria.