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<br />tested throughout the project (see Trial Weld Information sheets in ~.ppendix C for <br />results). <br />' Non-Destn~ctive Field II'eld Tests <br />' Non-destructive tests were conducted along the length of every field weld during liner <br />installation. Each wedge-welded panel seam was field tested by air pressure testing <br />within the seam channel formed by the wedge welder (i.e., air chann~l testing). The <br />channel in each seam was pressurized to a minimum of 30 psi, and the pressure was <br />monitored for five minutes. Seam failure was assessed based on a max~mum allowable <br />air pressure drop of 3 psi over the five-minute interval as defined in the Conceptual <br />' Design Report. <br />All extrusion-welded seams were tested using a vacuum box under 5 psi minimum (i.e., <br />vacuum testing). Vacuum testing also was used to test wedge-welded sums that failed <br />the air channel test. If no loss of vacuum or presence of bubbles were ob~erved along the <br />length of the seam, the seam was considered satisfactory. Any holes, ears, or cracks <br />' detected during vacuum box testing were identified, marked, and repaired. All <br />information related [o air channel and vacuum tests performed during ling installation is <br />' provided on the Non-Destructive Test Log sheet in Appendix C. <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br />1 <br />Destructive Field Weld Tests <br />Destructive (shear and peel) tests were conducted on seam samples cut fr¢m the installed <br />liner at a frequency of approximately one sample collected per 1,000 feej[ of seam. Six <br />specimens were extracted from each seam sample and were subjected t~ shear or peel <br />tests (3 shear tests, 3 peel tests). Each of the tlvee shear test specimens ~~ere required to <br />have a minimum shear strength of 120 lb/inch-width of seam, while each df the three peel <br />test specimens were required to have a mininmm peel strength of 70 ll~/inch-width of <br />seam. <br />A total of four samples (2 extrusion weld samples, 2 wedge weld samples)~were collected <br />for destructive testing during liner installation. The results of the shear a~(d peel tests on <br />specimens extracted from these samples, provided in the Destructive Test Log in <br />San Lurs Project 8 GeoTraus, /nc. <br />n~N rrcmnsU~~m„r.ro~.n,~,,.~~~m~~,h,,,aa..m~a a„u„<m~ao~ ~ February 20D1 <br />