How can I defend or reject the back charges ?
We have project for channel earth works as a sub contractor,we finished the excavations,trimming and compaction for side slopes.
All the work has been done according to the drawings and accepted by consultant.
The inspections was for FDT and surveying works.
I found some acceptable differences according to specifications for the surveying works (tolerance) of bed preparation (5mm – 15mm)
The channel lining with concrete for 75mm.
The contraction engr. of main contractor didn’t accept the works while the works was approved,Most of the repair were to correct faulty level by Subcontractor, yet back charges were applied on subcon. without prior notice.