Inserted a 6” liner through the open pipe in hallway extending downstream approximately 70’ ending in the 6" PVC pipe outside of building. Reinstated all five connections on this line. Inserted a 4-6” liner through the existing 4" clean-out in hallway extending downstream approximately 15’ ending in existing 6" PVC pipe. Reinstated 3 connections on this line. Inserted a 4” liner through the 4" PVC stack in mechanical closet extending downstream approximately 5ft ending just before 6" main line. Installed a 6x4 connection liner on this line. Inserted a 4” patch liner through the open pipe in hallway extending upstream approximately 3’ toward staff bathroom ending before toilet connection.