Modular materials within the excavation

S6.3.8: Where cobbles or setts are encountered during excavation, they may be recovered and re-used for reinstatement of the relevant layer. Alternatively, and at the discretion of the undertaker, the layer may be reinstated using CBGM base laid to a thickness of 100 mm, or to match the original thickness, whichever is greater.
S6.3.9: Modules, cobbles, setts, stones, rocks, or other large aggregate materials laid upright in an interlocking fashion, often termed ‘penning’, will exhibit a greater stiffness than an equivalent layer of cobbles/setts laid horizontally. Where such upright interlocking modules are encountered, the layer must be reinstated using CBGM base laid to a thickness of 100 mm, or to match the original thickness, whichever is greater.
S6.3.10: Where surplus modules, cobbles or setts are removed from site, they remain the property of the authority. The undertaker must notify the authority and retain them for 10 days following such notification. Thereafter, the undertaker is free to dispose of them.
S6.3.11: Where CBGM base is used at base level, it must be used in accordance with S6.3.2 to S6.3.6.