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5.2.4 Geomembrane Subgrade Preparation Prior to geomembrane deployment, the surface on which the geomembrane will be installed must be prepared in accordance with the technical specifications. Before geomembrane installation, the CQA monitor and geosynthetics installer must inspect the surface. The CQA monitor must verify the following: ® The soil underlying geomembrane has been prepared in accordance with the final cover subgrade preparation technical specifications. ® No sharp objects or other materials that could puncture the geomembrane are present on the prepare subgrade soil surface. ® The anchor trench dimensions have been checked, and the trenches are free of sharp objects and stones. ® There are no excessively soft areas. ® All construction stakes have been removed. ® The geosynthetics installer has certified in writing on a form acceptable to the CQA monitor that the surface on which the geomembrane will be installed is acceptable. 5.2.5 Panel Layout As-Built During installation, the CQA monitor will maintain an as-built panel layout drawing that shows the following as-built information: ® Orientation and size of each geomembrane panel. ® Roll numbers associated with each panel. ® Assigned panel numbers. ® Assigned seam numbers. ® Destructive test locations. ' ® Repair locations. 5.2.6 Panel Placement Documentation During panel placement operations,the CQA monitor must: ® Record panel numbers and dimensions on a panel/seam log. ® Observe the panel surface as it is deployed and record all panel defects and defect corrective actions (panel rejected, patch installed, extrudate placed over the defect, etc.) on ' a repair sheet. ® Verify where required, corrective actions are made in accordance with the technical specifications. ® Verify equipment used during deployment operations does not damage the geomembrane. CH CQA Plan 041712 Rev2a.doc 5.5 Construction Quality Assurance Plan