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<br /> <br /> <br />1 <br /> <br />in the collection pond and the connecting ditches. Approximately 200,934-sf of geogrid was used <br />for the facilities construction. <br />The liner installation was divided into areas to facilitate the record keeping for the QC and QA <br />programs. SRK as-built Drawing No. 14711-1O5B depicts these areas. The areas were lined <br />according to the numerical sequencing shown on the drawings. Detailed panel layout and <br />dimensions are depicted on SRK as-built Drawings 14711-1O5C through 14711-1O5H. <br />The bulk of the sheet seam welding was performed using double wedge welders. The air channels <br />' created by the double wedge welding machines were air tested at approximately 31 psi. Leaks in <br />the seams were isolated and capped. All "I" joints were capped. Capping and repair joints were <br />' made using extrusion welding techniques. All of the extrusion welds were vacuum tested for water <br />tightness. <br />' 4.1 Male Embanl®ent Liner <br />' The main embankment foundation was continuously lined with 40 mil VLDPE liner. Liner areas <br />1,2, and 3 correspond to the liner under the main embanlvnent. The liner wntractor experienced <br />extreme difficulty making the wedge welders perform adequately while installing the main <br />' embattlanent liner system. A significant percentage of seams were subsequently capped using <br />extrusion welding techniques. The double wedge welding machines periodically melted holes in the <br />t seams which resulted in a large number caps and seams that could not be tested continuously by <br />air testing of the channel All repairs on the seams and interior areas of the liner were vacuum <br />tested for water tightness prior to acceptance and placement of the Type 2 cover material. <br />Destructive samples were cut from seams at approximate 500-ft intervals and tested on site by SRK <br />' for specified integrity (See Appendu B). <br />4Z Sputter Embanl®ent Liner <br />' The sputter embankment foundation was continuously lined with 40 mil VLDPE 1mer. Liner areas <br />8, and portions of aeeas 4 and 7 correspond to the liner under the sputter embanktent. (See SRK <br />as-built Drawing No.14711-IOSB) The liner contractor, Gundle Lining Systems, experienced the same <br />difficulty with the wedge welders which in turn reduced the ability to continuously air test the <br />' channel Capping and subsequent vacuum tests of the caps, and interior liner repairs was done to <br />test for water tightness prior to acceptance and placement of the Type 2 cover material. <br />16 <br />I~ <br />