As per visiting the site, we found that the contractor had repaired 4 units of artificial stone in bay 2 No:(S8F-007, S7-009, S6-007, S6B-003) Using non-approved materials and non approved method, because the contractor using grinder machine to adjust the edges of units mentioned above which led to the appearance of defects in these units. Therefore, these units is considered rejected and the contractor has to change it by another similar units without defects.