The Survey Association PAS128 Utility Mapping Accreditation (PUMA) Scheme enables TSA members to demonstrate compliance with PAS 128:2022, which specifies the requirements for the detection, verification, and location of existing and new underground utilities, as well as the implementation of good practice in terms of risk management, competency management, transparency of process and organisational efficiency.
TSA and LRQA developed the PUMA scheme in conjunction with TSA members who participated in the pilot process to support scheme validation. The scheme aims to give accredited TSA members a competitive advantage over other commercial survey companies by giving clients confidence in the level of service and product accuracy assured by the accreditation.
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Participating TSA Members
| Company | Approval status | PAS 128 scopes | Date of accreditation |
| Met Geo Environmental Ltd | Approved | A*, B*, C*, D | 10 July 2023 |
| MK Surveys Ltd | Approved | A*, B*, C*, D | 16 January 2024 |
| Powers | Approved | A*, B*, C*, D | 25 January 2024 |
| Site Vision Surveys Ltd | Approved | A*, B*, C*, D | 8 February 2024 |
| Malcolm Hughes Land Surveyors Limited | Approved | A*, B*, C*, D | 28 February 2024 |