Specifications include, but are not limited to: replace the aeration diffuser system in the sewer plant blending sludge and primary sludge wells with new stainless steel piping and anchors; Fabricate a new 4 inch to 1 inch stainless steel header system to supply blower air to the existing #1 Sludge Blending Well and Primary Sludge Well tank. 5. The 4 inch header shall be Schedule 10 (stainless steel pipe, 316L type) with six (6) 1 inch Schedule 40 branch lines attached by weld-o-lets (stainless steel, 316L type) 6. The air diffuser lines shall be 1 inch Schedule 40 threaded (stainless steel, 316L type) to receive the 1 inch weld-o-lets on the 4 inch header. The 1 inch lines will be bent to match the bottom curve of the tank. 7. New 4” Schedule 10 stainless steel (type 316L) header piping for the Blending Well, shall be installed from the diffuser header in the Blending Well east into and through the Primary Sludge Well ; All brackets, braces, hangers and supports to be made from stainless steel material (i.e. Unistrut, angle iron, riser clamps, Unistrut clips, wedge-all concrete anchors, nuts, bolts, etc.) 10. 4 inch header and 1 inch diffuser lines shall be anchored at least every 18 inches.