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GSE <br />GSE I fining Techno►ogv, Inc, <br />1245 Eastland Avenue <br />Kingstree, SC 29556 <br />Ftone 843-382-4603 <br />Fax 843-382-4604 <br />-- ---1�ef-b rravio?er�ItV j Re- ism sce-azrd Test Pre3uenc rof frST Geo-text?les--------- — — — - <br />n <br />Project 61Q 7 % <br />1'o Whom It May Concern: <br />The resistance of nonwoven needle punched geotexules to ultraviolet Iight depends primarily on <br />antioxident and carbon black package mixed with resin to prepare a forrnulation for fiber extrusion. As <br />Iona as this formulation remains the same the UV resistance of a geotextiles does not change. Therefore, <br />GSE performs UV testing only once per resin formulation. The testing is performed according to ASTM <br />Test Method D 4355'and results are included on GSE geotextile specification sheet. Currently, all GSE <br />geotextiles meet or exceed a value of 70% strength retained after 500 hours of UV exposure.. -GSE will <br />meet or exceed this value for the referenced project. <br />Although GSE geotextiles are manufactured using one of the best available antioxident packages, we <br />recommend covering the geotextiles within 15 days of exposure to direct Sunlight. This period does not <br />include time during rihich geotextiles rolls reimain on site covered in black siu-ink-v,-rap. 0,—, - <br />recommendation is based on UV performance data published in technical literature indicating geotextile <br />strength can decrease sharply after prolonged exposure to Sunlight. <br />Actual data from an independent laboratory can be supplied upon request. <br />Charles L. Miller <br />Laboratory Manaaer - Kingstree <br />