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CITY OF EVERETT STORMWATER MANAGEMENT MANUAL <br /> Design and Installation Specifieafions ) <br /> See DCSS Drawing#201 for details. Note: the 100 Coot minimum length of the entrance shall be reduced <br /> to the maximum practicable size when the siZe or configuration of the site docs not allow the Full length <br /> (100 Cect). <br /> l. A separation geotextile shall be placcd undcr the spalls to prcvent fine sediment Gom pumping up <br /> into the rock pad. The gcotex4le shall mect thc following standards: <br /> a. Grab Tcnsilc Strcngth(ASTM D4751): 200 psi minimum <br /> b. Grab Tensilc Elongation(ASTM D4632): 30 percent maximum <br /> c. Mullr.n Burst Shength(ASTM D3766-SQa): 400 psi minimum <br /> d. AOS(ASTM D4751): 20 to 45(U.S.standard sieve size). <br /> 2. Hog fuel(wood-besed mulch)may be substituted for or cambined with quarry spalls in arcas that <br /> will not be used far permanent roads. Hog fuel is gener�lly less efiective at stabilizing <br /> consWction entances and should be used anly at sites where the amount of haffic is very <br /> limikd. Hog fuel is not rccommended for entrance stabilization in urban areas. Thc <br /> effecfiveeess of hog fuel is highly variable and it generally requires more maintenana than <br /> quarty spalls. The inspxtor may at any time require the use of quazry spalls if the hog fuel is not <br /> preventing sediment�om bcing trackcd onto pavement or if the hog fuel is being carricd onlo <br /> pavement. Hog fucl is prohibited in permanent roadbeds because organics in the subgrade soils <br /> cause degradation of the subgrade support over time. <br /> !. Fencing(see BMP C 103)shall be installed as necessary to restrict haffic to the construction <br /> enhance. <br /> 4. 1Whcnevar possible,the cntrance shall be constructed on a firm,compacred subgrade. This can � <br /> substantially increaze t6e cffectivcness of t6e pad and reducc thc oeed for mainteoance. <br /> Mainfenance Standards <br /> 1. Quarry spalls(or hog fuel)shall be added i(thc pad is no longer iu accordance with the <br /> spccificetions. <br /> 2. If the entrance is not preventing sediment hom being tracked ooto pavement,then altemative <br /> measures to keep t6c st�ets fice of sediment s6ell bc used. This may includc aa incrcase in the <br /> dimensions of ihe entrance or the installation of a whecl wazh. <br /> 3. Any sediment that is tracked onto pavement shall be removed by shoveling or street sweeping. <br /> 'fhe sediment collected by sweeping shall be removed or stabilized on site. The pavement shall <br /> nol be cicaned by was6ing down the street,except whcn swceping is ineffective and there is a <br /> threat ro public safety. If it is necessary to wash the strcets,the conswction oC a small sump shall <br /> bc cansidcred. Thc scdimcnt would lhcn be washcd into thc sump whcrc it can bc wntrollcd. <br /> 4. My quazr�spalls lhat azc loosened from the pad,which cnd up on the roadway shall be removed <br /> immediately. <br /> 5. If vehicles arc cntering or exiting the site at poiats othcr than thc conshuction entrancc(s),fencing <br /> (see BMP C l03)shall be installed to control traffic. <br /> 6. Upon project completion and site stabiliration,all construction accesses intended as permanent <br /> access tor meintenance shall be permanently stabilized. <br /> Volume fl—Construction Stormwater Pollution Prevention <br /> 3-5 <br />