liquid ring vacuum pump ( api-681 ) , supply of liquid ring vacuum pump ( api-681 ) design , engineering , supply , supervision for commissioning , shop testing , inspection ( including third party ) , commissioning and 1 year mandatory spares for normal operation , special tools ( if any ) , mandatory services ( if any ) as per technical specification no . s-17047-4-bsm-mr022 , vacuum pump with motor ( p-9414 a/b ) , supervision of erection , testing & commissioning as per material requisition number s-17047-4-bsm-mr022 for item mentioned in 1 . 00 above . , overtime rate/ hour beyond normal 8 hours work on normal working days . , per diem charges for up to 8 hours on weekly off days/holidays ( as applicable to site ) , overtime rate/hour for work on weekly off days/ holidays ( as applicable at project site ) .