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L ) inti:o �Technoioay. inc: <br />USE � <br />12^5: 2Siland '_Veaut <br />ingstree, SC 29556 <br />phone 843-3a%-4003 <br />Fax 843-382-4504 <br />Date L' t�3 <br />Ref: Uairclio!,et (U -V) Resista_nce and 1estFreq aency Of Gs IE Geotex`1es <br />project 6 1 oZ 91 <br />To Whom It May Concern: <br />The resistance of nonwoven needle punched geotextiles to ultraviolet light depends primarily on <br />antioxident and carbon black package m xed with resin to nlepare .2 formulation for ober extrusion. As <br />Ion; as this formula_, on remains the same the UV resistance of a geotextill es does not change. Therefore, <br />GSE performs U -V testing only once per resin formulation. The testing is performed according to ASTM <br />Test.Vmethod D 4355'and results are included on GSE geotextile specirication sheet: Cu=. ently, all GSE <br />geotextiles meet or exceed a value of 70 io strength retained after 500 hours of U V exposure.. GSE will <br />meet or exceed this value for `die referenced project. <br />1-1 though GSE geotextiles are manufactured using one of the best available antioxident packages, we <br />reconrnend covering the geotextiIes within 115 days of exposure to direct Sunlight. This period does not <br />.include %l:ae uuLiug YYllil.11 gegLexLl;.es 1'gllS rer4ain o1: Site Cv.'ere:[ i% bla-71 <br />Ieco---manendation is based on TJT` perforraianct data publ S Led in technical literature ineicatina geotex ile <br />s:eng h can decrease sharply after prolonged exposure to Sunlight. <br />Actual data Lom an independent laboratory can be supplied upon request. <br />1 � <br />Charles L. M-ller <br />Laboratory Manager - !Lingstree <br />n <br />J <br />