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superseded by prevailing guidance documents of the controlling agency. 5.2 SPECIFICATIONS A. The Contractor shall be solely responsible for the satisfactory completion of all earthwork in accordance with the Project Drawings and Specifications. B. Equipment used in the excavation, transport,mixing, stockpiling,processing, installation and compaction of all materials used in construction of the alternative final cover improvements will be standard of practice grading machinery of known specifications suitable for performing the required work in a timely and efficient manner. C. All material considered by the Geotechnical CQA Consultant to be unsuitable for use in the construction of the alternative final cover improvements shall be removed. D. All clearing, grubbing, stripping and site preparation for the project shall be accomplished to the satisfaction of the Geotechnical CQA Consultant and the Construction Manager. E. Material deemed unlikely to meet the performance specifications and not disposed of during clearing and grubbing or demolition shall be removed from the construction area as directed by the Construction Manager. F. The ground surface to receive fill shall be prepared (cleared, grubbed or stripped) to the satisfaction of the Geotechnical CQA Consultant and the Construction Manager and the fill shall be placed, spread, mixed, watered and compacted in accordance with the project specifications and as recommended by the Geotechnical CQA Consultant. G. The ground surface prepared to receive fill shall be scarified, disced or bladed until it is uniform and free from uneven features which may prevent uniform compaction. The scarified ground surface shall then be brought to approximately optimum moisture content, mixed as required, and compacted to a minimum of 90 percent of the maximum dry density as determined by ASTM D1557. If the scarified zone is greater than 12 inches in depth, the excess shall be removed and placed in lifts of six to eight inches in thickness. Prior to fill placement, the ground surface to receive fill shall be inspected by the Geotechnical CQA Consultant. H. Irreducible rock or rock fragments in excess of three(3) inches in maximum dimension shall not be utilized for the alternative final cover improvements. I. Suitable and sufficient processing and compaction equipment shall be on the job site to handle the amount of fill being stockpiled, processed, mixed and/or placed. If necessary, excavation or import equipment will be shut down temporarily in order to allow time for proper preparation and/or compaction of fills. Sufficient watering -10- C"x2003-033\EDOMHILLCQAPI.AN.DOC Geologic Associates