Laserfiche WebLink
1 <br />A minimum thickness of 1 foot (0.3 m) of soil is recommended between a light dozer (such as a <br />CAT D-3 or wide fradc caterpillar D-6 or fighter) and the geomembrane. <br />In heavily trafficked areas such as access ramps, soil thickness should be at least 2 to 3 feet (0.6- <br />0.9m). ' <br />- SoillFarth Cover on Top of Geomembrane: <br />' Placement of soils, sand or other types of earth cover on top of the liner shall not be performed until <br />all destructive and nondestructive testing has been performed and accepted. <br />' Placement should be performed to minim¢e wrinkles. Equipment operators should be briefed on <br />method of placement and affects of thermal expansion and contraction of the finer. <br />Material placed on bop of the liner should be badc~umped on Gner and, in order to avoid the <br />formation of wrinkles, efforts should be made to load the soil so that it comes down on top of the finer <br />rather than being pushed across the sheet This is done by 1) using a front~nd Bader to place soil <br />ahead of spreading soil cover, and 2) spreading soil by building a mound at the edge of sot, then <br />' pushing soil up and over the mound causing it to come down on the liner. <br />If a wrinkle forms, every effort should be made to walk thb wrinkle out <br />Minor folding over of wrinkles is acceptable providing an even transition ocarrs at the tail of the <br />wrinkle. If exoessive stress points are created at the tail of the wrinkle, the wrinkle should be cut out <br />and repaired per Section 3.4. <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />1 <br /> <br /> <br />15 <br /> <br />