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TSCIDDA OW ASSO HILLS PLAT 4 The width and location of the subgrade shall be within 1.0 foot of the width and location shown on the plans. NOTE: START UP OF UTILITY CONSTRUCTION WILL CONSTITUTE ACCEPTANCE OF THE STREET SUB GRADE. 2.3 Backfillini and Trench Compaction A. The backfilling shall be accomplished with the use of suitable materials selected from the excavated materials to the extent available and practical. Should the materials available within the trench section be unsuitable or insufficient, the Contractor shall, when directed by the Engineer, replace unsuitable material beneath roadways with suitable materials from other parts of the project. The removal and disposal of unsuitable material and the hauling, placing and compacting of the surplus material, shall be considered incidental to the sewer installation and no payment will be made for this item. Compaction of the backfill shall be done on lifts of uniform layers of loose material, not to exceed 12" except that by the authority of the Engineer in consideration of the demonstrated capability of special type vibratory compactors, these maximums may be increased at his discretion. Each lift shall be compacted over the full width of excavated area as specified herein. Service trenches must be compacted in the same manner as the main trench. In areas where curb and gutter exists, sufficient curbing shall be removed to allow the prescribed compaction over the entire disturbed area. A minimum of one utility trench compaction test per every two stations measured along centerline is to be taken below the upper three (3) feet of trench backfill. 2.4 Pipe Beddini All PVC Pipe shall be bedded in granular material to springline. Granular bedding material is incidental to PVC pipe unit bid price. Class B bedding shall be used for PVC pipe. -4-