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C. Subbase Material: Naturally or artificially graded mixture of natural or <br />crushed gravel, crushed stone, crushed slag, natural or crushed sand. <br />D. Drainage Fill: Washed, evenly graded mixture of crushed stone, or <br />crushed or uncrushed gravel, with 100 percent passing a 1 -1/2 in. sieve <br />and not more than 5 percent passing a No. 4 sieve. <br />E. Backfill and Fill Materials: Satisfactory soil materials free of clay, rock or <br />gravel larger than 2 in. in any dimension, debris, waste, frozen materials, <br />vegetable and other deleterious matter. <br />PART 3 - EXECUTION <br />3.01 EXCAVATION <br />A. Excavation is Unclassified, and includes excavation to subgrade <br />elevations indicated, regardless of character of materials and obstructions <br />encountered. <br />B. Unauthorized Excavation: Removal of materials beyond indicated <br />subgrade elevations or dimensions without specific direction. <br />Unauthorized excavation, as well as remedial work directed by Engineer, <br />shall be at Contractor's expense. <br />C. Additional Excavation: <br />1. When unsuitable bearing materials are encountered at required <br />subgrade elevations, carry excavations deeper and replace <br />excavated material as directed by Engineer. <br />2. Removal of unsuitable material and its replacement as directed will <br />be paid on basis of contract conditions relative to changes in work. <br />D. Stability of Excavations: <br />1. Slope sides of excavations to comply with local codes and <br />ordinances having jurisdiction. <br />2. Shore and brace where sloping is not possible because of space <br />restrictions or stability of material excavated. <br />3. Maintain sides and slopes of excavations in safe condition until <br />completion of backfilling. <br />06/06 02200 -2 03- 4138.0 <br />