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planned for the project. This type of schedule guides the contractor on work to be done <br /> before other work is started so that serious erosion and sedimentation problems can be <br /> avoided. <br /> Followinga specified work schedule that coordinates the timingof land-disturbingactiv- <br /> ities p <br /> itheinstallationcontrol measures is perhaps the most cost-effective wayof <br /> it esandofp p <br /> controlling erosion during construction. The removal of surface ground cover leaves a <br /> site vulnerable to accelerated erosion. Construction procedures that limit land clearing <br /> g <br /> provide timely installation of erosion and sedimentation controls, and restore protective <br /> cover quickly can significantly reduce the erosion potential of a site. <br /> Design Considerations <br /> . Minimize construction during rainy periods. <br /> . Schedule projects to disturb only small portions of the site at any one time. Com- <br /> plete grading as soon as possible. Immediately stabilize the disturbed portion <br /> before grading the next portion. Practice staged seeding in order to revegetate cut <br /> and fill slopes as the work progresses. <br /> 11-4.2 Runoff Conveyance and Treatment BMPs <br /> This section contains the standards and specifications for Runoff Conveyance and Treat- <br /> ment BMPs. Table II-4.2.1 Runoff Conveyance and Treatment BMPs by SWPPP Ele- <br /> ment (p.327), below, shows the relationship of the BMPs in 11-4.2 Runoff Conveyance <br /> and Treatment BMPs to the Construction Stormwater Pollution Prevention Plan <br /> (SWPPP) Elements described in 11-3.3.3 Step 3 - Construction SWPPP Development <br /> and Implementation (p.236). <br /> Table I1-4.2.1 Runoff Conveyance and Treatment BMPs by SWPPP <br /> _ Element <br /> Ele- Element Ele- Element Ele- <br /> ment #4 Ele- ment #8 Stab- Element ment Element <br /> BMP or Ele- #3 Install ment #7 Pro- ilize #9 Con- #10 #13 Protect <br /> ment Name Con- Sed- #6 Pro- tect Chan- trot Pol- Control Low Impact <br /> trol iment tect Drain nels lutants De- Devel- <br /> Flow Con- Slopes Inlets and Out- Water- opment <br /> Rates trols lets ing <br /> BMP C200: <br /> Interceptor <br /> Dike and ✓ ✓ <br /> Swale <br /> (p.331) <br /> 2014 Stormwater Management Manual for Western Washington <br /> Volume II- Chapter 4 -Page 327 <br />