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BOEING FUGL DOCK -TRENCH DRAIN JULY 1994 <br /> , basis. Street washing shall be allowed only after other methods to <br /> prevent the transport or to remove the sediments are unsuccessful <br /> 2. Strucmral Practices: In addition to stabilization practices, the Erosion and <br /> �.diment Control Plan shall include a description of structural BMPs to divert <br /> flows from exposed soils, store ilows or otherwise Iimit runoff and the <br /> discharge of poliutants from exposed areas of the site to the degree attainable. <br /> Such practices may include silt fences, eacth dikes, dtainage swales, sediment <br /> • iraps, check dams, subsurface drains, pipe slope drains, Ievel spreaders, storm <br /> drain inlet protection, rock outlet protection, reinforced soil retaining systems, <br /> gabions, and sediment basin. Structural practices ahould be placed on upland <br /> � soils to the degree attainable. The installation of these devices may be subject <br /> ro Section 404 of the Federal Ciean Water Act. The plan shall ensure that the <br /> ! following requirements ace satisfied: � <br /> a. Prior to leaving the site, stonn water runoff shall pass through a <br /> sediment trap, or other appropriate BMPs. <br /> b. Properties adjacent to the project site hall be protected from sediment <br /> deposition. <br /> c. Sediment traps, perimeter dikes, sediment barriers, and other BMPs <br /> intended to trap sediment on site ahall be constructed as a first step in <br /> grading. These BMPs shall be functional before land disturbing <br /> activities take place. Earthen Ftructures used for sediment wntrol <br /> such u dams, dikes, and diversions shall be stabilized as soon as <br /> possible. <br /> d. Properties and waterwaya downstream from the construction site shall <br /> be protected from erosion due to increases in atortn water cunoff from <br /> the site. <br /> e. All temporary erosion and sediment control BMPs shall be removed <br /> within 30 days after final site stabili7ation is achieved or aftet the <br /> temporary BMPs are no longer naded. Trapped sediment shall be <br /> removed o�stabilized on-site. Disturbed soil areas resulting from <br /> removal shall be permanently stabiliu. <br /> 3. Selection of Stabiliration and Structural BMP's described in Volume il of <br /> Ecology's Stotmwater Mana¢ement Manual for the Pueet Sound Hasin <br /> {SWMM)• or other equivalent and approptiate BMP's to wmply with the <br /> requirements listed in sections above. Permittas outaide the puget Sound <br /> basin shall selxt from BMP's described in the Erosion and Sediment Control <br /> Handbook, by Goldman et al; Volume II of Ecology's SWMM as adapted for <br /> local conditions using best professional judgemenh or other equivalent end <br /> appropriate BMP's to comply with the requirements listed in subsxtions <br /> above. <br /> 4. Inspection and Maintenance: All BMP's shall be inspected, maintained, and <br /> repaired as needed to assure ccntinued perfomiance of their intended function. <br /> , All on-site erosion and sediment control measures shall be inspected at least <br /> ona every sevcn days and within 24 hours after any srocm event of greater <br /> than 0.5 inches of rain per 24 hour period. An inspection report file shall be <br /> maintained. <br /> SUMMARY OF WORK 01010 -4 <br />