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<br />Golder Auociates Ine. <br />200 Union Boulevard. Suite 500 <br />Lakewood. CO USA 80228 <br />Telephone (303) 9800540 <br />Fax (303)985-2080 <br />February 9, 1996 <br />RF(',ENFD <br />~B ~ 4 1996 <br />Cripple Creek & Victor Gold Minii~~®~par~peta)st~ucU10gy <br />2755 State Highway 67 <br />Victor, CO 80860 <br />Attention: Mr. Ron Roberts <br />Golder <br />~Associa~es <br />Our Ref: 943-2847.001 <br />RE: LINER LOAD AND INTERFACE SHEAR STRENGTH TEST RESULTS <br />FOR 100 iViIL TEXTURED LLDPE GEOMEMBRANE <br />Dear Ron: <br />Golder Associates Inc. (Golder) has completed the liner load and interface shear strength <br />tests associated with the 100 mil textured linear low density polyethylene (LLDPE) that <br />was requested by the Cripple Creek & Victor Gold Mining Company (CC&V) as part of <br />the 1996 Phase II Completion geomembrane evaluation. <br />Site specific materials were used in the testing. Pad No. 3 and Area No. 2 materials were <br />processed to meet [he Low Volume Solution Collection Fill and Soil Liner Fill <br />specifications, respectively. Poly-Flex Inc. provided 100 mil textured LLDPE <br />geomembrane samples. <br />The Low Volume Solution Collection Fill / 100 mil textured LLDPE geomembrane/ Area <br />No. 2 Soil Liner Fill configuration was subjected to a normal load of 385 psi for a period <br />of 24 hours. The geomembrane was observed to have minor indents from the granular <br />materials. However, no pinholes or defects were observed when the geomembrane was <br />vacuum tested. The liner load laboratory report is presented in Attachment A. <br />Interface shear strength testing was performed for the Low Volume Solution Collection Fill <br />/ 100 mil textured LLDPE geomembrane /Area No. 2 Soil Liner Fill configuration. The <br />configuration was loaded to normal loads of 50, 100, 150 and 300 psi and sheared at a rate <br />of 0.04 inches per minute. Test results indicate that the configuration exhibited a peak <br />friction angle of 19 degrees and a cohesion of 990 psf, and a residual friction angle of 18 <br />degrees and a cohesion of 865 psf. Interface test results for the Drain Cover Fill / 100 mil <br />smooth LLDPE /Low Volume Solution Collection Fill configuration is presented in <br />Attachment B. <br />In the January 9, 1996 letter to CC&V entitled "Interface Shear Strength Results for the <br />Phase II Cresson Project", the critical stability for the Phase II Cresson Project was <br />OFFICES IN AU87RALIA. CANADA. GERMANY HUNGARY. ITALY. SWEDEN, UNITED KINGDOM. UNITED STATES <br />