Utility Layout (Sheet 1) : For utility there will be separate skid it will not be part of SPDU set up. Vacuum Pump should be installed where space available for maintenance some where inside utility skid. 
Utility Layout (Sheet 4) : We can consider utility pipe line route from stair case back side so as to avoid extra pressure drop in header line. Also we can terminate header once ATFD & LLE set up was over.
 Utility Layout (Sheet 5,7,8,9,11) : Same as above
