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-. .......a f... .. �... ...m.e,.. q..y.. .W"X+ ,W ♦....... wX 4..s. .�,'. .n n%,w.', <br /> v e <br /> I ti'1'pf t'i'i'ten tatfo f 7 <br /> General <br /> A stabilized construction entrance is a pad of aggregate underlain with filter cloth located at any <br /> point where traffic will be entering or leaving-a construes site to orftom a of way, <br /> street, alley,sidewalk,or parking area. 1-Ue per.of,ttlstal*ft�d cotes is to <br /> reduce or eliminate the tracking t <br /> tracking of sediments and other _ ooWl; �d ofd <br /> sediments into local storm drains and is o'€agile dust. <br /> Where traffic will be entering or lead„ a <br /> should be used. NPDES permits <br /> tracking of sediments onto pavedis- <br /> from mud and dirt carried out froom; <br /> Stabilized construction entrances art1. <br /> aF 'a� t Ecom <br /> equipment leaving a construction she. - <br /> Advantages of the Stabilized Coils � eft <br /> from equipment and serves to channel` a �tic aid out of fhe sib at speci ;d <br /> locations. Efficiency is greatly increased when a washing rack is included as part of a stabilized <br /> construction entrance/exit. <br /> Design and Layout <br /> : Construct on level ground where possible. <br /> ■ Select 3 to 6 in.diameter stones. <br /> • Use minimum depth of stones of 12 in.or as recommended by soils engineer. <br /> ■ Construct length of 5o ft minimum, and 30 ft minimum width. <br /> ■ Rumble racks constructed of steel panels with ridges and installed in the stabilized <br /> entrance/exit will help remove additional sediment and to keep adjacent streets clean„ <br /> s Provide ample turning radii as part of the entrance. <br /> ■ Limit the points of entrance/exit to the construction site. <br /> ■ Limit speed of vehicles to control dust. <br /> ■ Properly grade each construction entrance/exit to prevent runoff from leaving the <br /> construction site. <br /> • Route runoff from stabilized entrances/exits through a sediment trapping device before <br /> discharge. <br /> ■ Design stabilized entrance/exit to support heaviest vehicles and equipment that will use it. <br /> IN Select construction access stabilization(aggregate, asphaltic concrete; concrete)based on <br /> longevity,requiredpmformance,and site conditions. Do not use asphalt concrete(AQ <br /> grindings for stabToexi stabconstruction;access/roadway. <br /> 2o'16 California.Storrnwater BMP Handbook Janua?y 2003 <br /> Construction <br /> WWW.Cabmpha ndbooks.corn <br />