The grout cap will traverse both hillsides between the river level and EL 153 and is to be 4m wide. Rock quality to be expected along both sides of the alignment is shown on a large scale geological map together with a tabulation of recommended remedial treatment. Each side will require different treatment, which has been summarised below: • LEFT HAND SIDE requires blanket removal of the top 3m in the upper half, and 1 to 1.5m in the lower half. Selective dental treatment will be necessary on the upper slopes and along the shear zone, and the removal of unstable boulders. • RIGHT HAND SIDE selective picking out and "popping" of large boulders resting on the quartzite dip slope together with excavation of soil filled trenches. Complete removal of the upper calcrete capping will also be necessary. Continuous on-site assessment of remedial work by a geologist will probably be required.