Specifications include, but are not limited to: A. New Castle County Department of Public Works (the County) is seeking proposals for on-call Mainline Test and Seal Pipe Grouting of Sanitary Sewer Pipes, Defects, and Lateral Connections and Curtain Grouting for Sanitary Sewer Manholes under contractual services as described herein at various sites countywide. B. The Vendor shall be licensed to do business in the State of Delaware and have a current New Castle County Contractor License. C. The Vendor shall provide all labor, materials, tools, equipment, and incidentals as shown, specified, and required for testing mainline sewer pipe joints, defects and lateral connections by hydraulically applying a positive air pressure to the joints and defects, then monitoring and recording the pressure in the void. If testing results indicate the need for rehabilitation, the Vendor shall chemically seal the joint, defect or lateral connection by using packer injection grouting methods which consist of pressure injection of chemical grout into the soils outside the pipe. Chemical grouts shall be designed to be injected into the soil surrounding the pipe, which stabilizes the soil and forms a permanent impermeable seal called a soil ring, and into the annular space between liners and host pipes. Adequate volumes of grout must be injected to form an effective seal. The Vendor shall provide all labor, materials, tools, equipment, and incidentals as shown, specified, and required for application of grout to the soil and void areas on the exterior of buried sanitary sewer manholes by means of curtain grouting technique.
