The lake is filled with garbage, construction debris, weeds and hasn’t been desilted, which prompted the volunteers to visit the lake to chalk out a restoration plan. The volunteers said when they reached the lake to survey the extent of damage, police came and detained them in a nearby marriage hall till evening. To restore a waterbody, one needs a letter from the Corporation. What kind of permission does a lake audit need?” he asked. A volunteer said though Arappor has audited close to 25 lakes since 2016, they had never faced such a problem..