PAS-128

PAS-128 is rapidly becoming an integral part of underground utility mapping, and the specification exists to raise standards across the survey industry. We work to all four PAS-128 quality levels, matched to what a project actually needs: Type D, where utilities are plotted from record data alone; Type C, combining records with a physical site reconnaissance; Type B, where utilities are detected geophysically to establish horizontal and vertical position; and Type A, where a utility is verified by physical identification through vacuum excavation, hand dug trial pitting or visual inspection inside a chamber.

• Type D: desktop record based plotting
• Type C: records plus site reconnaissance
• Type B: geophysical detection with depth
• Type A: physical verification and vacuum excavation
• The recognised UK benchmark for utility survey quality

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