National Association of Sewer Service Companies (NASSCO) is a source for sanitary sewer rehabilitation specification guidelines, industry practices, and inspector training. It is dedicated to the establishment of improved procedures and standards for all phases of sewer system rehabilitation. NASSCO publishes technical papers on inflow and infiltration, television inspection, sewer system evaluation, and trenchless sewer rehabilitation. It provides a certification program for pipeline assessment and television inspections. For more information please visit their website at http://www.nassco.org