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WMU FU-08 October 2008 <br /> Forward Landfill Project No.021605.08 <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-08 composite liner system. The <br /> elements monitored by Vector and discussed within this section include subgrade <br /> preparation, LPSL placement, LCRS granular drainage material placement, and <br /> placement of the protective operations soil layer. <br /> The earthworks CQA activities performed by Vector for the WMU FU-08 composite <br /> liner construction included: <br /> ® monitoring of subgrade preparation; <br /> • collecting samples of the LPSL material; <br /> ® monitoring and testing of LPSL placement; <br /> ® reviewing geotechnical laboratory testing result for compliance with <br /> project specifications; <br /> IMMI& <br /> 4Pa 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-08. 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 /> -9- <br />