Below is an item from a Bill of Quantities. 

Assuming that a trench is lm deep and 300m long has to be excavated in open ground, a new water main (material cost = US$ 70 per m) laid and the trench backfilled. As a representative of the Nominated Sub- contractor NWC: 

i. Prepare a method statement and a risk assessment for the prime cost item.

ii. Estimate the cost (amount) of the prime cost item. 

Number A510.3 Item Description Prime Cost item - Diversion of water by NWC Unit Sum Quantity Rate (US$) Amount (USS)