Laserfiche WebLink
1 <br />San Luu Project Phue n Rain 1 Expansion -Final Construction <br />The results of QA/QC testing for the Embankment raise fill are discussed in Section 6.2.1 and <br />presented in Appendix C.1. <br />' 5.4.2 Liner Cover/Drainage Blanket <br />Material Type 2 was specified as the liner cover/drainage blanket material in the Earthwork <br />' Technical Specifications (Appendix F of the Phase II, Raise 1 Design Report). The variability of <br />the borrow sources for Type 2 material was such that a readily available homoEeneous source did <br />not exist. Average material properties of the borrow were of a gravelly silty sand, in general <br />compliance with the Type 2 material specification. Discrete zones of the borrow, however, were <br />' of sandy silt and of gravelly sand and required blending and screening to produce a more uniform <br />material. The resulting material was free of particles in excess of 1.5 inches in diameter. The <br />acceptable gradations for this material type were slightly modified by the Designer to allow some <br />' variability of the mid-range grain size with no change to the performance characteristics. The <br />maximum allowable percent passing the iU200 sieve remained at 35 percent. <br />The Contractor's borrow procedures and material fiandling precluded conforma>,ce testing of liner <br />cover/drainage blanket material prior to placement on the liner in acres 1 through 23 as depicted on <br />Drawing 14719-102. Therefore, a conformance testing program consisting of ]I sample for every <br />'h acre of liner cover was adopted prior to final acceptance of all liner wver which had been placed <br />in those areas. For the remainder of the expansion area, the Contractor's liner cover borrow and <br />placement procedures were modified with the use of a screening plant to ensure removal of <br />' oversized material and to allow for conformance testing prior to transport from the borrow source. <br />The material was loaded with front end loaders into haul trucks, deposited adjacant to the prepared <br />liner surface and spread with a D-8 Caterpillar bulldozer. <br />The resulu of QA/QC testing performed by SRK on the liner cover material are discussed in Section <br />' 6.2.2 and presented in Appendu C.2. <br />5.4.3 Liner Sub-base <br />Material Type 3 was utilized for the liner sub-baselclay liner component as specified. Placement <br />of this material as specified, 95 percent maximum dry density at plus 3 percent to minus 2 percent <br />of optimum moisture content, resulted in an acceptable final product. However, wet weather during <br />' ay g sect o. <br /> <br />