1. Comprehensive contract, subcon etc.
2. Quantity or 2/3 years agreement. e.g HDB. You seldom/ will never come across hdb calling tender for soil test. They require it quite often for gls, bto & sers. Therefore, it is feasible for them to tender it in a more economical way. Unlike URA, less frequent and you're more likely to notice it.
3. Description used during tender process and similar to pt 1 etc...
Ask ah neh. maybe they know something.
nonetheless, there are real works going on at site. spotted 3 machines today.