Landfill Gas Utilization Project

Description

The City of Tucson (COT), Environmental & General Services Department (EGSD), is issuing this Solicitation for experienced, qualified, fully integrated, multi-discipline Offerors, firm(s) to develop capital and operational investment options, install, and maintain equipment to clean the landfill gas (LFG) generated at the Los Reales Sustainability Campus (LRSC), located at 5300 E. Los Reales Rd, Tucson, AZ to pipeline grade standards and market the gas as a renewable natural gas (RNG) product, including the environmental attributes.In 1967, the LRLF began accepting municipal solid waste (MSW) and construction and demolition waste and today the waste volume is estimated at 22,000,000 tons of MSW. The site currently receives approximately 700,000 tons per year of waste from several service areas.The LRSC is comprised of approximately 1,087 acres. The existing waste disposal footprint consists of approximately 183 acres of unlined landfill area, 80 acres of current lined landfill and 160 acres of proposed expansion lined landfill area. Adjacent expansion areas developed will ultimately "piggyback" onto the current waste disposal mound to form a continuous waste mass.Previously, LFG collected from LRSC was transported via an underground pipeline to the Tucson Electric Power (TEP), H. Wilson Sundt Generating Station, where it was used as a supplementary fuel for steam generating units for electrical power generation. Transportation of the LFG to TEP was discontinued in November 2019, since then, the LFG has been flared.The current Gas Collection and Control System (GCCS) consists of 119 vertical LFG extraction wells of which 33 are active. The wells are connected, via a network of high-density polyethylene (HDPE) lateral and header piping, to the LFG compressor and candlestick flare systems.The flare system is a candle stick flare manufactured by John Zink, Model ZEF 1030 and has a maximum capacity of 2,600 standard cubic feet pe