Description : The check valves on the discharge side of the existing compressors have reached the end of their useful life.  This contract will facilitate purchase of replacement check valves from prospective bidders via a competitive bid.  The successful bidder will be responsible for supplying and delivering the check valves to the ALCOSAN Plant.  ALCOSAN Maintenance staff will install the new valves upon delivery.  Expected lead time for these materials are approximately 9 months.