ARCHIVED REPORTS_2001_2 - Laserfiche WebLink

Home Browse Search

Prior to liner installation, the Contractor, Liner Subcontractor, Construction Manager and Geotechnical CQA Officer, shall verify that: • All lines and grades have been checked by survey and approved by the Construction Manager. The subgrade has been prepared in accordance with the Project Specifications. • The surface has been rolled and compacted to be free of surface irregularities, loose soil, and protrusions. • The supporting soil surfaces are property prepared and contain no sharp protrusions that could damage the VFPE. • There are no excessively soft areas, which could result in VFPE damage. All construction stakes, hubs or other items used for grade control and/or verification have been removed. • All certification and testing of the underlying soils is complete and approved. • The Liner Subcontractor has certified in writing that the surface on which the VFPE will be installed is acceptable. The certificate of acceptance shall be given by the Liner Subcontractor to the Contractor and the Construction Manager prior to commencement of'VFPE installation in the area under consideration. The Geotechnical CQA Monitors shall have a copy of this certificate"before 'installation of VFPE commences in any given area. After the supporting surface has been accepted by the Contractor and Liner Subcontractor, it shall be the Contractor and Liner"Subcontractor°s responsibility to indicate to the Construction Manager any change in the condition of the supporting surface that may require -repair work. °fie Construction M-anager concurs with the Contractor and Liner Subcontractor, then the Construction Manager shall coordinate the repair -of the supporting Surface. The subject -area will also be observed by the Geotechnical CQA Monitors who shall have the authority to reject an area even-.afiea.41,has. been accepted by the Contractor -and Liner Subcontractor. Anchor Trench Anchor trenches shall be excavated to the lines and widths shown on the Project Drawings, prior to VFPE placement. The Geotechnical CQA Monitors shall observe that the anchor trenches have been constructed according to the project documents. Slightly rounded corners shall be provided where the VFPE adjoins the trench so as to avoid sharp bends in the VFPE. No loose soil shall be allowed to underlie the VFPE in the anchor trench. Anchor trench backfill shall be compacted to at least 90 percent relative compaction (ASTM D1557) as outlined in the Specifications. -20- C:\2001-048\FINAL COVER CQA.DOC\08/20/01 Geologic Associates