SECTION B - Derry City Council

structures down to subbase
130 GROUNDWORKS
o
o
Old foundations, slabs and the like: Break out in locations and to the extents
stated.
Contaminated material: Remove, and carry out remediation required by the
Enforcing
Authority.
140 BENCH MARKS
o
Unrecorded bench marks and other survey information: Give notice when found.
Do not
remove marks or destroy the fabric on which they are found.
120 STRIPPING TOPSOIL
• General: Before beginning general excavation or filling, strip topsoil from areas
where there
drawings.
will be regrading, buildings, pavings/ roads and other areas shown on
• Depth:
- Remove to an average depth of 250mm
- Give notice where the depth of topsoil is difficult to determine.
• Handling: Handle topsoil for reuse or sale in accordance with clause 155
• Around trees: Do not remove topsoil from below the spread of trees to be
retained.
121 TREATING TOPSOIL
• Treatment: Apply a suitable translocated non residual herbicide.
• Timing: Not less than two weeks before excavating topsoil.
125 HANDLING TOPSOIL
• Standard: To BS 3882.
• Aggressive weeds:
- Species: Included in the Weeds Act, section 2 or the Wildlife and
Countryside Act,
Schedule 9, part II.
- Give notice: Obtain instructions before moving topsoil.
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