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Table 4.10 <br />Geotextile Standards <br />Pol�micnc �1csh AOS 0.60 mm masimum for sli� Glm u�ovcns (k30 sicvc). 0.J0 <br />(ASTT1 D4751) mm marimum for oll oihcr gcotcstilc �ypes (�50 sic��c). <br />0.15 nnn minimwn for all (abric i}pcs (r 100 sicrc). <br />\\'a�cr Pcmiiuiaity 0.02 scc minimum <br />�ASI'M 1}U91) <br />Grab Tcnsilc S�rcngth I RO Ibs. \1inimum (or cx�ra SUcngth (abric. <br />(AST(�t D767�) IOO lbs minimum for scmdard strcng�t. fabric. <br />Grab 1'cnsilc Strcngth ?0?6 maaimum <br />(ASTM D76±?l <br />Ultrn��iolc� Rcsisiancc 7090 minimum <br />(AST11 673551 <br />. Smndard streneth fabrics shall he supported a•ith �eirc mesh, chicken <br />wire, 2-inch s'_-inch wire, safety fence, orjute mesh to increase the <br />strength of the fabric. Silt fence materials are acailable that have <br />syn`hetic mesh backing attached. <br />. Filter L•�bnc material shall contain ultraviolet rav inhihiton and <br />stahilizers to provide a minimum of six tnonths of expected usablc <br />constriction life at a tempemlure nnge of 0°F. to 120°f�. <br />. 100 perccnt biodcgr.3dablc silt fcncc is a��ailablc that is strong, long <br />lasting, and can bc Icft in placc aflcr thc project is complctcd, if <br />pemiittcd by local rcgulations. <br />. Standard Notcs for constniction plans :md spccitications follow. Rcfcr <br />to Figurc 4.19 for standard silt fcncc dctails. <br />The contractor shall install and mainta�n temponry silt f'ences at the <br />locations sho��n in the Plans. The sil� fences shall be con��rticted in <br />thc areas of cicaring, grading, or drainagc prior to starling thosc <br />ac�ivitics. A silt fcncc shall noI bc considcrcd tcmporaq� if thc �ilt <br />fcnce must function hevond the life of the cantract. The silt ferce <br />shall pr�vcnt soil carricJ by nmotTu�atcr from going bcncath, tLrough. <br />or o� cr thc top of thc silt (cncc, but shall allo�s� thc �ea�cr to pass <br />Qvough tlic fcncc. <br />T'hc minimum hcight of thc top of silt fcncc shall he 2 tcct anJ ihc <br />maxitnum hcight shall bc 2'G fccl aboec thc original ground surfacc. <br />I�hc gcotextilc shall bc sc«•n togcthcr at thc poin� of manufacturc, or at <br />an approvcd location as dctcnnincd by the Einginecr, to forni gcotexlilc <br />Icngths as rcquircd. NI scwn scams shall bc loca�cd at a support post. <br />Allcmativcly, t��'o sections of silt fcncc can bc o�•crlappcd, providcd <br />the Contractor can demonstratc, to thc satisfaction of the E•ngineer, that <br />Qic ovcrlap is long enough and that the adjacent fcnce scctions arc <br />closc cnough togcthcr to prevcnt sil� ladcn «•atcr from cscaping <br />through thc fencc a� thc ovcrlap. <br />Fe6ruary 2005 Volume ll — Consfrudion Stomiwater Pollution Pievenfion 4-95 <br />