Upgrades to the gas produced via OWNER’s anaerobic digestion process to produce a product acceptable to Nicor Gas for Renewable Natural Gas. This includes modifications to digester gas piping, replacement of digester gas safety equipment including construction of a new pouredin-place drip trap structure, rehabilitation of the existing gas storage sphere, addition of a pre-procured biogas upgrading system supplied by Unison Solutions, Inc, and a new gas receiving station. The biogas upgrading system consists of two separate skids to be located within Building E, and three separate pairs of media vessels and a glycol chiller to be located outside of Building E. Miscellaneous building improvements in Building E including demolition and replacement of process equipment; piping; electrical; heating, ventilation, and air conditioning equipment and structural improvements.
