Driver toilet in basement 01; Axonometric mapping of water supply system for driver toilet in basement 1; Axonometric mapping of soil and vent system for driver toilet in basement 1; Axonometric mapping of waste water system for driver toilet in basement 1; Toilet blow-up (drivers' room) at basement-01-1; Driver toilet blow-up at basement 1 - storey plan; Sections (PT-3 & PT-4) at level 1st