Site Investigation Survey Framework

Lot 1 covers delivery of above ground surveys and associated outputs to support feasibility, optioneering, design development, consents and construction planning across Thames Water's operational area. Surveys will be undertaken on live operational sites and project locations and delivered in line with the Standard Requirements for methodology, data, reporting and deliverables Core survey types Core means survey types you would expect to require on most commissions to establish a safe, buildable baseline for design, consents and construction planning · Laser scanning · Topographical surveys · Drone surveys · Measured building surveys · Photogrammetry Optional survey types Optional means survey types required when triggered by site conditions, risk, stakeholder needs or a specific design decision, but they may be common for certain asset types · LiDAR surveys · Aerial photography · 360 photo surveys · Satellite surveys · Mobile mapping · Geodetic control · Infrared (thermal) imaging · Hydraulic surveys · Hydrographic surveys including bathymetric · Instrumentation and monitoring · Structural and building condition surveys · Land mapping · GPS RTK · Engineering

Lot 2 covers below ground surveys focused on utility detection, mapping and condition assessment to support safe design and delivery and reduce strike and delay risk across Thames Water's operational area. Outputs will be provided in line with the Standard Requirements for methodology, data, reporting and deliverables Core survey types Core means survey types you would expect to require on most commissions to establish a safe, buildable baseline for design, consents and construction planning • PAS 128 utility surveys (or a direct European equivalent) • Detailed manhole surveys • CCTV drainage surveys • Electromagnetic locating or EM scanning • High Density Array GPR Optional survey types Optional means survey types required when triggered by site conditions, risk, stakeholder needs or a specific design decision, but they may be common for certain asset types • Cable identification • Pumping station drop tests • Bridge deck scanning • Connection surveys • Line and level surveys • Concrete scanning • Rebar scanning • Chamber Scanning

Lot 3 covers ground investigation services to support geotechnical and geoenvironmental understanding for design, consents and construction planning across Thames Water's operational area. Outputs will be delivered in line with the Standard Requirements, with appropriate safety, quality and data controls Core survey types Core means survey types you would expect to require on most commissions to establish a safe, buildable baseline for design, consents and construction planning • Geotechnical and geoenvironmental ground investigation • Electromagnetic (EM) Optional survey types Optional means survey types required when triggered by site conditions, risk, stakeholder needs or a specific design decision, but they may be common for certain asset types • Microgravity surveys • Vibration or acoustic surveys • Metal detection • Unexploded ordonnance (UXO) surveys

Lot 4 covers integrated multidisciplinary survey programmes where Thames Water requires a single provider to plan, sequence and deliver surveys spanning multiple disciplines across Lots 1-3, producing consolidated outputs in line with the Standard Requirements for methodology, data, reporting and deliverables.