Public Tender (Delivery Service) Annual Maintenance And General Overhaul Of The Chp Module 2 Of The Central Sewage Treatment Plant In Darmstadt The Chp Module 2 On The Central Sewage Treatment Plant Has Reached 80,000 Operating Hours And Therefore Needs To Be Overhauled According To The Manufacturer'S Maintenance Plan. Since The Maintenance Contract For This Chp Mod...  Morethe Chp Module 2 On The Central Sewage Treatment Plant Has Reached 80,000 Operating Hours And Therefore Needs To Be Overhauled According To The Manufacturer'S Maintenance Plan. Since The Maintenance Contract For This Chp Module Has Expired, The Maintenance Will Be Assigned At The Same Time And Will Begin After The General Overhaul Has Been Completed.