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Continued... <br />Response: <br />With this response letter, the Division will find additional attachments to respond to the <br />above comment. <br />C. The Division noted a discrepancy between the hard copies of this report and the <br />electronic/pdf copy. In the electronic/pdf version of Appendix M, the ROC drawings for the <br />Underdrain GCL panel layout (Appendix M.1) and the underdrain LLDPE panel layout <br />(Appendix M.3) are both labeled "DRAFT'; whereas the hard copies are issued as ROC <br />drawings and stamped by a professional engineer. <br />Response: <br />Attached with this response letter is the electronic/pdf copy of the signed and stamped <br />ROC drawings that were included with the hard copy of the ROC report submitted to the <br />Division. <br />D. Email comment from email dated January 29, 2016 at 2:22 pm. We've noted the following <br />additional potential inconsistencies: <br />Appendix 1.5 -40 -mil LLDPE Smooth Geomembrane-Roll Quality Control Certificates: <br />• Roll #F14D402025, Lot # CEH810040: Thickness Measurement MIN = 37 mil <br />• Roll # F14D402026, Lot # CEH810040: Thickness Measurement MIN = 37 mil <br />• Roll # F14D403032, Lot # CEH810040: Thickness Measurement MIN = 37 mil <br />According to Appendix E -Technical Specifications -Section 02776.0 Geomembrane- <br />Typical Properties -Table 2.01-A, Thickness MIN (lowest individual value) for 40 -mil <br />LLDPE is 38 mils. Explanation? <br />Response: <br />The current industry standard specification for the minimum geomembrane thickness is <br />the "lowest individual of 10 values which is -10% of the nominal value" (Geosynthetic <br />Institute GRI Test Method GM 17). For 40 -mil LLDPE Smooth geomembrane, the <br />minimum thickness is 36 mils. The three rolls identified by the Division are within the <br />acceptable limits. We have included Table 1(a) Linear Low Density Polyethylene (LLDPE) <br />Geomembrane (Smooth) from the Geosynthetic Institute Test Method GM17 with this <br />response for reference. <br />A conformance test performed by TRI in included in Appendix K.2 40 -mil LLDPE Smooth <br />Geomembrane Conformance Results measuring the minimum value as 41 specifically for <br />Roll No. F14D402025, however conformance testing was not performed on the other two <br />rolls of concern. Amec Foster Wheeler accepts Geosynthetic Institutes Test Method GM17 <br />(as industry standard) and the geomembrane was accepted for use. <br />E. Email comment from email dated January 29, 2016 at 2:22 pm. We've noted the following <br />additional potential inconsistencies: <br />Appendix M.5 -80 -mil LLDPE DSMS Geomembrane-Roll Quality Control Certificates: <br />Amec Foster Wheeler Environment & Infrastructure, Inc. <br />2000 S. Colorado Blvd., Suite 2-1000 <br />Denver, CO 80222 <br />Tel: (303) 935-6505 <br />Fax: (303) 935-6575 <br />amecfw.com <br />Page 3 <br />