Gas Collection Systems At Badlands And Lamb Canyon Landfills

The Riverside County Department of Waste Resources is soliciting bids for on-call construction services to implement gas collection systems at the Badlands and Lamb Canyon Landfills in California. The scope of work includes trenching, backfilling, refuse excavation, and the installation of horizontal and vertical landfill gas wells, aggregate pits, and various HDPE header and lateral pipes. Additional requirements involve drilling native wells and probes, relocating existing pipe assemblies, installing butterfly valves, and implementing environmental controls to mitigate soil erosion and sediment. The project is structured via individual work orders spanning multiple fiscal years from 2026 through 2029, with all work adhering to the Greenbook Standard Specifications for Public Works Construction, Cal-OSHA, and EPA requirements. The contract will be awarded to the lowest bidder based on the base bid. Bidders must provide a bid security of 10 percent of the total aggregate amount, and the successful contractor must furnish payment and performance bonds equal to 100 percent of the contract price. Compliance with California prevailing wage laws and affirmative action/equal employment opportunity provisions is mandatory. Payment terms are Net 30, issued by the County Treasurer. Quality control is the responsibility of the contractor, though the County may employ independent testing and inspection providers to verify compliance. All materials must be delivered in original manufacturer packaging and stored according to strict environmental and preservation standards to maintain quality and fitness for work.