Laserfiche WebLink
I~ <br />1 Destructive samples were cut from seams at approximate 500-fr intervals on the seams and tested <br />on site by SRK for specified integrity (See Appendur B). <br />1 43 Lower Disposal Area Liner <br />The lower impoundment area was continuously lined with 40 mil HDPE liner supplied by Gundle <br />Lining Systems. Areas 4, 9, 10, 11, 12, and 13, shown on SRK as-built drawing No. 14711-105-B, <br />' correspond to the liner placed in this area. Gundle crews experienced difficulty in seaming with the <br />wedge welders. Holes in the seams from melt through with the wedge welders resulted in their <br />repau by capping and necessitated the extensive use of the extrusion type welders. With the high <br />frequency of repairs and reduced ability to continuously presswe test the channel, liner deployment <br />did not progress at an even pace. All internal pane( repairs, tie-ins to adjacent areas and repairs <br />to the seams were vacuum tested prior to acceptance and the placement of Type 2 cover material. <br />Destructive samples were cut from the seams at approximate 500-fr intervals and tested on site for <br />' specified integrity (See Appendix B). <br />' 4.4 Upper Disposal Area Liner <br />The upper impoundment area was continuously lined with 40 mil VLDPE liner supplied by National <br />' Seal Company, and deployed by Serrot starting June 21, 199E The liner crews experienced little <br />difficulty in seaming using wedge welders on new liner seams and extrusion welders on the tie-in <br />to the previously installed (1490) liner. Continuous presswe tests of the seam channel were done. <br />All areas for repair were marked and patches and caps were installed prior to vacuum testing for <br />water tight integrity. <br />1 Destructive samples were cut by the contractor at approximately 500 linear-fr of seam Length, and <br />taken to the SRK laboratory on site for specified integrity tests. Any failwes Nere noted and <br />marked for repairs on the seams in doubt. Repairs were made and vacuum tested prior to the <br />acceptance of the panel and placement of the Type 2 liner wver material. <br />All tie-in areas, patches, extruded holes and caps were vacuum tested prior to acceptance. The liner <br />' was completed on July ],1991, however the crew was asked to remain on the site until after all Type <br />2 material was in place. <br /> <br /> <br />17 <br />