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Stage 1A Partial Final Closure February 2006 Forward Landfill Project No.021605.06 Other CQA documentation with respect to test data and observation sheets are discussed within the following sections. Copies and summaries of various data for the soils monitored and physically tested by Vector are included in various appendices of this report. 3.3 Design Modifications During the construction of Stage lA Closure, modifications to the contract drawings and specifications occurred. The approved modifications during construction of Stage lA Closure are as follows: Compacted Earthfill Material Gradation: The design engineer modified the compacted earthfill material gradation, as long as the hydraulic conductivity satisfied project requirements. The Design Engineer reviewed the test data and found the results to be acceptable, as stated in a memorandum included in Appendix D. 3.4 Final Report Preparation of this final report documenting project CQA activities was the final task of the CQA program for the Forward Landfill, Stage lA Closure construction project. This report includes discussions of the findings and observations of the on-site CQA personnel regarding the activities identified above. The documentation of construction and CQA activities are presented on the field logs prepared by the CQA personnel, which are included as appendices to this final report. Also presented in the appendices of this final report are the results of laboratory conformance tests conducted on earthworks materials. The report contains a discussion of the CQA procedures performed by Vector, a discussion of the construction activities, and a description of the cover system components observed and tested by Vector. Photographic documentation of Vector Engineering, Inc. • 143E Spring Hill Drive•Grass Valley,CA 95945•(530)272-2448 -6-