2011-08-26_REPORT - M1980244 (28)

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ameO 6.1 Conformance Testing Geomembrane manufactured by Poly -Flex was installed in the 2011 Phase 5 VLF OSA 2nd Portion. A TRI /Environmental (TRI) (AMEC subcontractor) representative performed geomembrane conformance sampling at the Poly -Flex plant in Grand Prairie, Texas. Samples were sent to TRI's geosynthetic laboratory in Austin, Texas, for conformance testing. Geomembrane rolls were not used on the project unless approved by AMEC based on conformance test results. Prior to the 40 -mil and 80 -mil geomembrane arrival to site, AMEC performed 37 conformance tests at a frequency of one test per 140,565 square feet, exceeding the minimum specified testing frequency of one test per 150,000 square feet. Testing frequency was based on AMEC's inventory of the 40 -mil and 80 -mil geomembrane. Conformance testing for the 40 -mil smooth and 80 -mil single -sided textured LLDPE geomembrane used to construct the 2011 Phase 5 VLF OSA 2nd Portion liner system met specifications. Conformance test results are presented in Appendix K. 6.2 Deployment Monitoring Geomembrane panel deployment monitoring performed by AMEC included: • Observation of panel surface condition and panel overlap; • Assignment of panel numbers; • Verification of factory roll number and receipt of complete certification prior to allowing deployment; • Measurement of sheet thickness; • Documentation of deployed panel lengths; and • Development of panel layout record drawing. Prior to the deployment of geomembrane, AMEC and Lone Star verified that the subgrade was free of soft spots, protrusions, angular particles, abrupt grade changes, and loose soil. AMEC and Lone Star verified that the SLF surface had been proof - rolled, and that the SLF AMEC Earth & Environmental, Inc. 2000 S. Colorado Blvd 2 -1000 Denver, CO 80222 Tel 303 - 935 -6505 Fax 303 - 935 -6575 www.amec.com `U