During a sewer rehab project divers were used to place a sewer plug in a 48” sewer line. The Line had not been dove since it was installed over 40 years ago. Upon an inspection with zero visibility we discovered there was a large amount of sediment in the pipe. In fact, the pipe was more than half way clogged. The divers equipped with high pressure jet hoses then blasted away over 40 years of material, (condoms, tampons, and you don’t want to know what else). After the material had been blasted away the 48” plug was installed. The new plug held and the chamber was pumped out. The remaining material in the chamber was then pumped out with a vac truck. It took 3-600 gallon vac trucks to finish cleaning the chamber.