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Continued... <br /> Response: <br /> Per the geomembrane manufacturer installation recommendations (Agru), Section 3.02 <br /> Geomembrane Placement, letter Q) states "All panels must overlap prior to the seaming <br /> process. This overlap affects a weld and allows for proper testing. In no case shall this <br /> overlap be less than 75 mm (3")". The 6 inches we reference on our tables is 3 inches on <br /> the top layer and 3 inches on the bottom layer for a total of 6 inches. A discussion has <br /> been added to this section of the report. <br /> 3. Sect 7.1, 5"' bullet. The text states "The SLF containment berms on the southwest limits <br /> are greater than 2H:1 V". Being steeper than specified may results in erosion problems or <br /> local sloughing. Please provide clarification as to why this deviation should be accepted <br /> by the Division. <br /> Response: <br /> Amec Foster Wheeler has added additional text to the bullet referenced above that <br /> indicates that a small portion of the berm was constructed at a slope slightly steeper <br /> than 2:H:1 V and clarified that it is not the pad that is steeper than 21-1:1 V. The berm is <br /> lined with geomembrane greatly reducing the risk of erosion in addition to ore remaining <br /> a minimum of 20 feet away from the berm as designed. <br /> 4. Sect 7.2, 2nd bullet: The text states "The resin certificates provided for the welding rod do <br /> not match the resin lots used during production of the 80-mil DSMS LLDPE <br /> geomembrane" Please clarify whether the "Extrusion weld integrity was verified with trial <br /> welds and destructive tests" or some other criterion were used to determine the resin <br /> lots used were acceptable. <br /> Response: <br /> Text has been revised to the report. The specification states that "Certification that <br /> extrudate to be used is composed of the same resin as the geomembrane used." While <br /> this is slightly open to interpretation, the resin is the same as the resin used to <br /> manufacture the geomembrane, but the lot numbers of the resin are not, it was a few <br /> different "batchs"/lots. <br /> Drawings: <br /> 5. The revision number and date listed for Drawing A400 is not consistent with the revision <br /> number and date on Drawing A400. No response is necessary. <br /> Response: <br /> Drawing A400 should be Revision 3 as indicated on the coversheet. Revision 4 was <br /> never re-issued for construction. Revision 3 is included with the addendum. <br /> Appendices: <br /> 9. Appendix D One weekly report as the wrong dates and three are missing signatures: <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 Page 2 <br />