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material shall then be obtained from the northern onsite borrow source. D. The EARTHWORK CONTRACTOR shall make all reasonable efforts to determine the type of soil being excavated at all times. Equipment operators or the EARTHWORK CONTRACTOR's representative directing excavation shall have sufficient knowledge and understanding of soil classifications to determine general soil type. E. The EARTHWORK CONTRACTOR shall stockpile excavated material in accordance with Section 3.6 of this Specification and shall direct equipment operators to the appropriate stockpile area depending on the soil classification of the majority of material that makes up the excavation equipment's payload. F. Refuse may be encountered in some excavation areas. The EARTHWORK CONTRACTOR shall notify the DESIGN ENGINEER and QA/QC CONSULTANT if refuse is encountered in areas other than at tie-ins/connections to existing WMUs at the site. The DESIGN ENGINEER will provide guidance on the depth the refuse shall be excavated and the appropriate backfill procedures. The EARTHWORK CONTRACTOR shall dispose of the excavated refuse in the active portion of the landfill or as directed by the OWNER. G. Excavation to be carried out for the convenience of the EARTHWORK CONTRACTOR shall conform to the limits approved by the DESIGN ENGINEER, QA/QC CONSULTANT, and OWNER and shall be at no additional expense to the OWNER. H. Excavated material shall be placed a sufficient distance from the edge of excavations to prevent cave-ins or bank slides. I. The CONTRACTOR shall excavate to sufficient lines and grades to construct the compacted clay liner and sumps as shown on the Construction Drawings and described in these Specifications. J. Shape, trim, and cut ditches and other drainage structures as necessary to achieve grades and dimensions shown on the Construction Drawings. 3.5 LIMITS OF EXCAVATION A. Excavate to the depths and widths, as shown on the Construction Drawings. Allow for minimum thickness of clay liner as required. Excavation carried below the grade lines shown or established by the DESIGN ENGINEER shall be replaced with the same fill material as specified for the overlying fill or backfill, and compacted as required for such overlying fill or backfill. Where the overlying area is not to receive fill or backfill, replace the overexcavated material and compact to a density not less than that of the underlying ground. Cuts below grade shall be corrected by similarly cutting adjoining areas and creating a smooth transition. Correct all overexcavated areas at the EARTHWORK CONTRACTOR's sole expense. Forward Landfill WMU FU-14 02300 11 EARTHWORK