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2.4 Site Limits No equipment will be allowed to cross river or stream beds. The construction limits shall be the property lines, street right-of-ways, and borrow areas. 3.0 EXECUTION 3.1 Clearing The site of all grading shall be cleared of rocks, boulders, trees, stumps, brush and other vegetation. Stumps and roots two inches or larger in diameter shall be removed to a depth of not less than 12 inches and stones and boulders six inches or greater in the longest dimension to a depth of six inches below the finished subgrade. Stone and boulders shall be removed from site or buried in an area and manner approved by the Engineer. 3.2 stripping The site topsoil shall be stripped of vegetation to a depth of 12 inches or to such greater depth as may be necessary to remove roots of grass and other organic matter. 3.3 Disposal of Unsuitable Materials The Contractor shall be responsible for disposal of all debris resulting from site preparation operations, including trees, brush, roots and sod stripping. Combustible material may be burned at the site if practical to do so without creating a hazard and only after obtaining a proper burning permit in accordance with area burning laws. 3.4 Subgrade Preparation Prior to placement of fill and after rough grading in cut areas, the subgrade shall be proof rolled with a grader, loader, or fully loaded tandem-axil dump truck with a minimum gross weight of 25 tons. Unsuitable areas observed shall be improved by compaction or by replacement with a suitable compacted fill. All other excess unsuitable material shall be removed from the site and disposed of by the contractor without liability on the part.of the Owner. 2200-2 I I I I I I I I I I I I I I I I I I I