I guess the simple answer is that yes, any items missing on the BofQ are an Employers risk as the Contractor had no where to price for them (60.6) and would be assessed as a compensation event. Discrepancies between WI and BofQ the Contractor is to have assumed to have taken BofQ as being correct (60.7).
It does beg the question here however as to how they planned to remove the base layer without removing the surfacing layer which you would have liked to have thought would have been noticed at tender stage.
It does beg the question here however as to how they planned to remove the base layer without removing the surfacing layer which you would have liked to have thought would have been noticed at tender stage.