This report contains information used by the staff at the Geological Survey at various times as a basis for advice to authorise responsible for construction of the new Government Offices at Victoria Square. It is not therefore an integrated report. A report entitled "Foundation Stratigraphy" by J.M. Lindsay, with an appendix by W.K. Harris, has been issued under separate cover. Because verbal information has already been supplied to the authorities concerned with the project, the report is restricted to explanatory notes on the Bore Log Analysis, the foundation characteristics of the Hallett Cove Sandstone (Limestone) in Bores 2 and 4, and a note by the Senior Geologist, Engineering Geology Section, based on examination of the limestone as it occurs at this and other sites in the City of Adelaide. Departmental reports by Messrs. Lindsay and Harris, reports for Kinnaird Hill and Associates by J. Cox, reports by Senior Palaeontologist, N.H. Ludbrook, and the Geology of South Australia (Journal of the Geological Society of Australia Volume 5, part 2) have been freely consulted during the preparation of this report.