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August 2002 -19- 003 -2203 <br />0 3.3 Ore Storage Area <br />Geomembrane installation activities for the OSA included deployment and .seaming of 80 -mil <br />single -sided textured LLDPE geomembrane, and non - destructive and destructive testing of <br />the geomembrane. Poly -Flex placed 80 -mil single -sided textured LLDPE geomembrane <br />panels P -1 through P -470 (approximately 1,430,000 square feet [neatline]) on compacted and <br />approved SLF as part of the Phase IVa Area. Record Drawing No. 5 in Appendix A presents <br />the OSA geomembrane panel layout. Ames anchored geomembrane at the upper limits of the <br />Phase IVa Area in an anchor trench a minimum of 3 feet deep by 2 feet wide. The 80 -mil <br />LLDPE geomembrane tie -in panels overlapped the Phase I geomembrane panels a minimum <br />of 3 feet and were extrusion welded, as shown in Detail 3 of Construction Drawing No. 17. <br />3.4 Underground Workings <br />A summary of underground working remediation for Phase IVa is presented in Table 3 <br />Additional remediation details are presented in Section 4.2.1. <br />• <br />1:1 001 220310400TutRgMO2 V0032203,0400,04740txt.Ooc Golder Associates <br />