Waster water Oil coalescer packages

Project requires an undeground concrete pit to be designed for a coalescing system. Pit has a depth of approx 6 metres. Pit design has to take into account hydraulic load, site seismic conditions, placement of coalescing equipment, access for maintenence of coalescing equipemnt and associated instruments. Design documentation to be developed is as follows: General arrangement drawing of the pit with all equipment, concrete form layout drawing, metallic reinforcement drawings and calcualtions for pit, civil calcualtions of pit, Bill of material for required amount of concrete and structural steel Please note: The work has to start immediately (URGENT) This is an ongoing Project Completion date: we have approx 4 to 6 weeks to finish the civil design to start construction at site.. We need civil, drawings and calculations to be performed in accordance with our Project specifications and International codes and standards..