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Stabilized Construction Entrance/Exit TC-1 <br /> ■ if aggregate is selected, place crushed aggregate over geotextile fabric to at least 12 in. depth; <br /> or place aggregate to a depth recommended by a geotechnical engineer. A crushed aggregate <br /> greater than 3 in. but smaller than 6 in. should be used. <br /> • Designate combi-n.ation or single purpose entrances and exits to the construction site. <br /> • Require that all employees, subcontractors, and suppliers utilize the stabilized construction <br /> access. <br /> • implement SE-7. Street Sweeping and Vacuuming, as needed. <br /> • All exit locations intended to be used for more than a h c-week period should Dave stabilized <br /> Construction entrance/exit BMPs. <br /> Inspection and Maintenance <br /> a :inspect and verif*:7 that activity—based BMPs are in place prior to the commencement of <br /> associated Activit eti. While activities associated with the B_NPs are under, way inspeC <br /> Iveekly during the rainy season and of two-week intervals 'n the non-rainy seaso' to verify <br /> continued BMP implementation. <br /> ■ ;nspect local roacs adjacent to the site daily. Sweep or vacuum to remove visible <br /> accumulated sedirr_ent. <br /> Remove aggregate, separate and dispose of sediment if construction entrance/exit is clogged <br /> with sediment. <br /> a beep all temporary:roadway ditches clear. <br /> m Check for damage and repair as needed. <br /> • Replace gravel material when surface voids are visible. <br /> • Remove all sediment deposited on paved roadways within 24 hours. <br /> • Remove;ravel and filter fabric at completion of construction <br /> Costs <br /> Average annual cost for installation and maintenance may var=-from $1,200 to $4,80o each, <br /> averaging $2,4O0per entrance. Costs will increase with addition of washing rack, and sediment <br /> trap. With wash rack, costs range from $1,200 - $6,00o each, averaging 60o per entrance. <br /> g $3, r <br /> References <br /> Manual of Standards of:Erosion and Sediment Control_ Measures, Association of Bav Area <br /> Governments, ,May 1995.� <br /> National Management Measures to Control Nonpoint Source Pollution from Urban Areas, <br /> USEPA Agency, 2002. <br /> Proposed Guidance Specifying Management Measures for Sources of Nonpoint Pollution in <br /> Coastal Maters, Work Group Working Paper, USEPA,April 1992. <br /> January 2003 California Stormwater BMP Handbook 3 of b <br /> f nncrr,ir*inn <br />