English to Polish Tech/Engineering Construction / Civil Engineering

"Existing Services Survey:
Prior to stripping out any of the existing works, the Contractor is to undertake a detailed survey to identify any through services ie services serving areas outside the current work zone which if inadvertently removed would cause unplanned loss or disruption to services to other areas. Where through services are identified, these are to be labelled and protected where necessary to prevent damage or injury. Where re-routing is unavoidable to allow the new build works to proceed or to maintain the service, these must be installed to the standard required of the final installation."