8-13-25: Descaled 4” cast sewer line from new 4” PVC floor clean out in room#2 downstream 60’ to floor clean out in hallway near entrance door#3. Descaled 4” cast sewer from floor clean out near entrance door#3 downstream 60’ to floor clean out in library near room 100A. Descaled 4” cast sewer from floor clean out in library near room 100A downstream 40’ to floor clean out on other side of library near room 100D ***line has a belly in pipe that holds about 2” or half pipe of water from 15’-30’ downstream from clean out***. Descaled 6” cast sewer from 4” floor clean out in library near room 100D downstream 60’ to wye near entrance door#1, size change from 4”-6” cast just downstream of clean out ***hole in bottom of 6” cast about 20’ downstream of clean out***. Vacuumed out all loose scale from sewer line 220’(160’x4” and 60’x6”) from room#2 to wye near entrance door#1 and televised line was all clear. *** wipes and heavy brown paper towels in section of pipe with belly also wipes near