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TABLE 7.2 <br /> REQUIRED FUSION AND EXTRUSION SEAM TEST RESULTS <br /> GRI-GM 19 <br /> Minimum Values Required <br /> (In Units of Pounds per inch of Width) <br /> i Geomembrane Nominal 30 40 50 60 80 100 120 <br /> Thickness mils mils mils inils mils mils mils <br /> I Hot Wedge Seams' ' <br /> shear strenQtli lb ill. 57 80 lop 120 160 200 240 <br /> shear elongation at bleak' .°o sit 5o t0 50 50 5() 50 <br /> peel stlen2th' lb in. 45 60 76 91 121 151 181 <br /> peel sepal atlon.°o 25 'S 15 15 2c <br /> Extrusion Fillet Seams <br /> Shear stren2tll, lb in. 57 80 100 120 160 200 240 <br /> shear eloneation at break". 50 50 cry S0 i6 ;(1 50 <br /> peel strength".lb.in 39 52 65 78 104 110 156 <br /> eel Separation."., 15 25 2,c s < ,5 <br /> 7ah!e 2;a)- Sean,Strength and related Piopemes of Thermally Bonded Smooth and <br /> Textured L;neai High Density Polyethylene(HDPE)Georneinhi ane(English Units) <br /> 7.3.0 Procedures for Test Failure <br /> Mould a sample fail a destructive test,the defect may be remedied by: <br /> Capping the respective seam in its entirety as described in this section, <br /> or <br /> If a defect is suspected to be local to a certain area it may be further investigated to <br /> isolate the defective are by: <br /> Taking small coupon test samples located 10'on either side of the defective sample seam <br /> void area. If these additional samples pass tensiometer testing, then full samples are to <br /> be taken. If these samples pass the tests, then the seam is capped between these <br /> locations. If either sample fails,then the process is repeated to establish the zone in <br /> which the seam should be reconstructed. All acceptable seam areas must be bounded by <br /> two locations from which samples passing destructive tests have been taken. <br /> Cap stripping of defective seams or isolated areas shall be performed using either wedge <br /> or extrusion welding techniques or combination thereof and re-testing the repaired area <br /> with applicable methods as described herein. Cap strips shall cover the defective seam <br /> by no less than 6715cm On either side of the original weld. Wider patches will be <br /> required to cover seam sample void areas. <br /> CLC shall document all actions taken in conjunction with destructive test failures; e.g., <br /> capping of failed seam area. <br /> Created by Colorado Lining International 1-800-524-8672 12 <br />