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<br />geomembrane where the other 2-inch gravel piece was located. <br />It is noted that it was impossible to smooth the upper surface of the soil liner fill including <br />gravel pieces in the mold to the same smoothness as that which is achieved in the field with the <br />smooth-drum roller. <br />After removal and cleaning, the VLDPE exhibited no perforations when examined over a light <br />source. Vacuum testing was performed on the specimen, and no pinholes where observed. The <br />specimen tested is provided as Attachement 4 to this letter (only included with original letter). <br />Line Cover Fill: <br />The liner cover fill showed no signs of distress from the loading. Particle breaking was not <br />observed. <br />Soil Liner Fill and Gravel Pieces: <br />The gravel piece that was placed on the flat portion of the soil liner fill broke at the edge during <br />loading. The gravel piece on the slope showed no signs of distress. The breakage may not be <br />related primarily to the loading but may rather be a function principally of the manner in which <br />that the stone was placed in the soil liner fill. As described earlier, a hole was excavated in the <br />compacted soil liner material to the general shape of the stone, however; the hole was <br />necessarily lazger than the stone. The fill subsequently placed between the sides of the hole and <br />the stone was difficult to compact and most likely was not compacted as well as the other soil <br />liner material. This would contribute to the breakage of the stone because of the lack of <br />confining pressure. <br />The surface of the soil liner fill appeared to be more compact and flat after the load application <br />indicating that additional compaction took place. <br />umma <br />I hope this quantitative test information provides you with the information you require to allow <br />placement of geomembrane on a prepared surface of Ironclad material that meets the minus 2- <br />inch specification and in particular material that meets that specification at the prepared surface <br />immediately prior to placing liner. Of course, as stated in our letter of August 30, 1994, the <br />surface must be smooth and any stone that is protruding from surface of the soil liner or any <br />stone that is fractured and has a potential to rotate and puncture the liner will either be removed <br />or laminated with a veneer of finer-grained soil liner fill. Further, the soil liner surface will be <br />free of visible wood and other non-earthen debris. <br />Your immediate acceptance of these test results and response to allow liner to be placed on the <br />Ironclad material that meets the minus 2 inch specification and which meets the "smooth" and <br />"no sharp or foreign objects" criteria would be very much appreciated. It is imperative that <br />4 <br />