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WMU FU-06 November 2006 <br /> Forward Landfill Project No.021605.07 <br /> 4.0 EARTHWORKS CONSTRUCTION <br /> As the earthworks construction was implemented, Vector performed CQA <br /> monitoring. This section describes the CQA tasks associated with the construction <br /> of the earthworks components of the WMU FU-06 composite liner system. The <br /> elements monitored by Vector and discussed within this section include subgrade <br /> preparation, clay liner placement, LCRS granular drainage material placement, <br /> and placement of the protective operations soil layer. <br /> The earthworks CQA activities performed by Vector for the WMU FU-06 composite <br /> liner construction included: <br /> • monitoring of subgrade preparation; <br /> • collecting samples of the clay liner material; <br /> • monitoring and testing of clay liner placement; <br /> • reviewing geotechnical laboratory testing result for compliance with <br /> project specifications; <br /> • observing installation of a leachate collection and removal system <br /> (LCRS); and <br /> • monitoring placement of protective operations/drainage soil layer. <br /> 4.1 Excavation <br /> The majority of the excavation was completed prior to Vector arriving on-site. <br /> Therefore, only minor excavation and shaping of the slopes was required within <br /> WMU FU-06. Prior to excavation, clearing and grubbing activities were conducted <br /> for removal of all deleterious materials such as grass, roots, or other organic <br /> vegetative materials. Upon completion of the excavation, RJA and Associates <br /> surveyed the as-built subgrade. The survey was reviewed by Vector for <br /> completeness. <br /> Vector Engineering, Inc. • 143E Spring Hill Drive•Grass Valley, CA 95945•(530)272-2448 <br /> -10- <br />