In an NEC Option B Contract, a contractor has used imported fill to fill in a drainage run. The supervisor is concerned there are signs of settlement in a section of this drainage run. This scenario occurs 6 months before completion. a. What should the supervisor do as soon as he sees this issue? (2 marks)

b. The contractor feels that the settlement is very minor and in a rarely trafficked area of the site. He is worried as excavating the area will cause major disruption to installation of an incoming gas supply - this has been programmed with an external gas supplier and has taken many weeks to negotiate. If the contractor misses the slot with the gas supplier, he may have to wait weeks for another date and there will be a knock-on delay to the programme. In this scenario, what can he suggest happens? (3 marks)

c. Having considered the contractor's proposal, the PM and Supervisor want to investigate the settlement further. What clause of the contract does he use to ask the contractor to look at this problem? What information does he need to give the contractor? (2 marks) d. Would it have made a difference