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3. Additional excavation beneath the elevations given above, and subsequent placement <br /> of granular borrow within the excavation void shall be subject to compensation per <br /> "Unit Prices". Volume of additional excavation shall be determined by the Testing <br /> Laboratory by in-place measurement. <br /> 4. If excavation bottom penetrates below design elevation without recommendation of <br /> testing laboratory representative, Contractor shall fill excavated area to design levels <br /> with compacted granular borrow as defined above. Associated costs shall be absorbed <br /> by Contractor. <br /> 5. Excavation shall permit placement and removal of forms where required. <br /> 6. Bottom of excavations shall not be disturbed once completed. If Contractors process <br /> results in disturbed soils as determined by the Testing Laboratory, the disturbed soils <br /> shall be removed and replaced with Granular borrow compacted to density as <br /> recommended by Testing Laboratory; associated costs shall be at Contractor's <br /> expense. <br /> 7. Contractor shall take appropriate measures to prevent slope failures at perimeter of <br /> excavations. <br /> C. Pavement Area Excavation: <br /> 1. Excavate proposed pavement areas to subgrade elevations as follows: <br /> Concrete Areas: 16" below proposed finish grade. <br /> Bituminous Areas: 36" below proposed finish grade. <br /> 2. Once excavation is complete to subgrade elevations as noted above, the exposed <br /> subgrade shall be inspected for evidence of highly organic material. If such material is <br /> evident at subgrade elevation, it shall be removed, and the resulting void filled with <br /> compacted select suitable material up to adjacent subgrade elevation, i.e., floor <br /> subgrade elevations per 3.4.8.1., or pavement area subgrade per 3.4.C.1. <br /> 3.5 FILL AREAS <br /> A. Fill Materials: <br /> 1. The fill materials shall consist of select suitable soils or granular borrow materials free <br /> from organic matter and other deleterious substances; specific application and <br /> materials shall be as noted under Part 2 above. Fill shall not contain stones or <br /> fragmentary rock measured in their greatest dimension larger than the following sizes: <br /> ADDENDUM#1 <br /> 1607.001 - ORONO ICE ARENA(CP-2) Page 02200- 10 <br />