91359-Construction And Upgrades, Wastewater Treatment Plant— General Construction91391-Maintenance And Repair, Wastewater Treatment Plant— General Construction91360-Construction, Water System/Plants, Main And Service Line— General Construction92597-Water Supply, Treatment, And Distribution/Engineering89065-Sewage And Waste Treating Equipment And Supplies89087-Water Treatment Equipment (Not Otherwise Classified)89008-Chlorination Equipment, Including Parts and Accessories91430-Concrete— General Construction91438-Electrical— General Construction91468-Plumbing— General Construction91455-Masonry— General Construction91479-Structural and Reinforcement Metal Work (Inactive, please see commodity code 914-57 effective January 1, 2016)— General Construction
