Drainage surveys, in accordance with appropriate highways standards, including but not limited to:
— validation survey,
— priority asset survey,
— filter drain condition survey by GPR,
— all assets condition and connectivity survey,
— pipework and chambers defect survey by CCTV,
— pipework geometric survey by laser profiler,
— pipework inclination survey by CCTV,
— all asset defect survey and connectivity survey,
— ditch defect and profile survey,
— pipework indicative condition by acoustic survey,
— chambers defect and geometric survey by laser scanner.