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31604.DSK WP-SFO SECTION 02215 PREPARATION OF SUBGRADE PART GENERAL 1.1 WORK INCLUDED A. This section covers the work necessary for the preparation of the subgrade, complete. 1.2 GENERAL A. The subgrade will be considered as those areas and surfaces of new or existing streets, alleys, driveways, sidewalks, or other public places upon which additional materials are to be placed under Contract, or which are to be constructed or prepared for the future placement thereupon of other materials. B. All underground work contemplated in the area of the subgrade shall be completed and properly backfilled before subgrade work is started. This is intended to include work on the Contract, work to be performed by the Owner, or by others. I C. These Specifications are to be used in conjunction with requirements in those sections of the Specifications having to do with specific types of base materials and.pavements. D. All excavation shall comply with applicable OSHA and local regulations. PART2 PRODUCTS 2.1 EXCAVATION AND EMBANKMENT A. The excavation is unclassified and shall include removal of materials which are encountered in excavating to the required grades, including existing pavement and curbs designated to be removed, or as required to accomplish the construction. 2.2 EQUIPMENT A. Furnish all necessary equipment required to accomplish the excavating, shaping, grading and rolling, and compaction specified herein. PART 3 EXECUTION 3.1 SUBGRADE A. Excavate and shape subgrade to line, grade, and cross-section. Compact subgrade to 95 percent of maximum density in accordance with . ASTM D1557. Remove all soft or otherwise unsuitable material disclosed f by the rolling and replace with suitable material from the excavation. Fill holes and depressions, which develop under the roller, to the required grade BAE31604.AS.T1 02215 1 PREPARATION OF SUBGRADE `