(You are the Contract Manager of the Employer ' s Representative in a Thermal Power...

Under FIDIC Silver Book 2017 (EPC/Turnkey), the Contractor bears extensive risk responsibility, particularly for design, site conditions, and data interpretation. However, there are important exceptions—especially concerning errors in the Employer’s Requirements.

For the first claim (piling works):

The Employer’s Requirements explicitly mandated compliance with a specific national standard (NTS-PW-01), which contained a proven technical error. Under Sub-Clause 1.9 [Errors in the Employer’s Requirements] , the Contractor is entitled to claim additional cost and/or time if it suffers due to such errors. Since the Contractor relied on a prescribed standard, the risk remains with the Employer. Therefore, this claim is valid.

For the second claim (flood wall):

Although the Site Data contained incorrect hydrological information, under the Silver Book (Sub-Clause 4.10 [Site Data]), the Contractor is deemed to have taken full responsibility for interpreting Site Data. The Contractor assumes the risk of inaccuracies unless expressly stated otherwise. Additionally, “Unforeseeable physical conditions” relief is significantly restricted in the Silver Book compared to Red/Yellow Books. Therefore, the Contractor is not entitled to additional payment for this item.

Thus, only the piling-related claim is admissible, making Option B correct.