Laserfiche WebLink
<br />that manufactured by Advanced Drainage Systems (ADS) of <br />~ Columbus, Ohio, or an equivalent product acceptable to <br />' the Engineer. The pipe shall be wrapped in a filter <br />~ fabric "sock" either by the pipe manufacturer or in the <br />field. If wrapped in the field, geotextile shall meet the <br />requirements of Section 7.4.2 of these Specifications. If <br />wrapped by the manufacturer, the geotextile shall be <br />compatible with the pipe and shall be continuously lapped <br />and welded such as that supplied under the Drain Guard <br />name by ADS. <br />t 7.4.2 Filter Fabric <br />7.4.2.1 General <br />Filter fabric (geotextile) shall be used as a <br />separation layer between the crushed ore and the leachate <br />collection berm fill over the leach pad liner system as <br />shown in the drawings. <br />r 7.4.2.2 Materials <br /> The filter fabric shall be non-woven cloth of <br /> polypropylene monofilament fibers in accordance with the <br /> following requirements, or as approved by the Engineer: <br /> Weight 4.5 ozlyd2 <br /> Tensile strength (ASTM D-1682) warp 90 lbs <br /> or stronger principal direction, min . <br /> Bursting strength - Mullen (ASTM 150 psi <br /> D-751), min. <br /> Puncture strength (ASTM D-751), min. 50 psi <br /> Permeabilty, min. 3 x 10"2 cmisec <br /> % stretch before breaking, min. 50% <br /> Loss of strength when wet, max. NIL <br />I. <br /> <br />N-27 <br />