4. Survey Type A: Verification

When requesting verification by excavation, the client should include the following text in the specification document:

Undertake a Survey Type A: by survey, as PAS 128:2022, of the required site area (reference to the search boundary plan to be provided by the client).

The survey shall identify and include:

01. Trial pit/trial hole/slit trench [delete as appropriate] to be excavated to a width of XX metres and depth of XX metres or to a width and depth that is safe and practical to do so.*

02. Information gathered from an exposed utility within an excavation shall as a minimum consist of:

a) nature of utility (such as pipe, cable or other)

b) configuration of multiple utility layout

c) diameter of utility (external diameter only)

d) material type e) backfill materials used

f) observation of the condition of utility

g) prevailing ground conditions

h) appropriate imagery to be captured of the exposed asset and environment – in line with the requirements of the client.

03. When backfilling a hole or trench any material used shall be compressed and tamped down to avoid subsidence. Any wearing course will be replaced with a like-for-like material, unless otherwise instructed.

04. Fees should be included to cover any excavation permit, safe systems of work and supervisor under the New Roads and Street Works Act 1991 (NRSWA) as appropriate.

*The surveyor can advise on this if the client is unsure what to specify.