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® 3.6.2 TECHNICIANS Technicians will be representatives of the Geotechnical CQA Consultant and will continuously observe all excavation and grading operations to provide a basis for concluding that construction is carried out in conformance with the Project Drawings and Specifications. Duties will include: • Observation of the preparation of the subgrade surface. • Verification that cover soils are derived from appropriate sources. • Visual evaluation of soil material properties for consistency with the Project Drawings and Specifications. • Identification of deleterious materials or other deficiencies in soil quality to minimize the possibility that these materials are incorporated into the final cover system. • Monitoring of moisture conditioning, mixing,blending, and processing for uniformity of material and moisture content. • Monitoring of activities for removal and/or disaggregation of oversize material from ® the fill. • Evaluation of the constructed cover material for conformance with the Project Drawings and Specifications. Observation of uniformity of coverage of compaction equipment, especially at fill edges, turnaround areas and on slope faces. • Monitoring of lift thickness. • Observation of the active fill pad at the beginning of each grading day and establishment of requirements for wetting/drying and/or processing of the exposed surface prior to placement of additional fill. • Undertaking field tests including but not limited to field moisture/density content and hydraulic conductivity testing at the minimum frequencies noted herein or at any time that a deficiency is suspected. • Recovery of samples for laboratory testing. • Laboratory testing of the moisture content and density, grain size distribution and hydraulic conductivity of fill materials in accordance with the requirements of the ® Specifications (including retests if necessary). -7- C"\2003-033\EDOMHH,LCQAPLAN.DOC Geologic Associates