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Stormwater Pollution Prevention Plan <br /> duringconstruction to satisfythe requirements set forth in the General NPDES Permit <br /> a <br /> ' (Appendix D). To avoid potential erosion and sediment control issues that may cause a <br /> violation(s) of the NPDES Construction Stormwater permit(as provided in Appendix D), the <br /> Certified Erosion and Sediment Control Lead will promptly initiate the implementation of one or <br /> more of the alternative BMPs listed in Appendix C after the first sign that existing BMPs are <br /> ineffective or failing. <br /> 3.1.11 Element #11 — Maintain BMPs <br /> All temporary and permanent erosion and sediment control BMPs shall be maintained and <br /> repaired as needed to assure continued performance of their intended function. Maintenance <br /> ' and repair shall be conducted in accordance with each particular BMP's specifications. Visual <br /> monitoring of the BMPs will be conducted at least once every calendar week and within 24 <br /> ' hours of any rainfall event that causes a discharge from the site. If the site becomes inactive, <br /> and is temporarily stabilized, the inspection frequency will be reduced to once every month. <br /> All temporary erosion and sediment control BMPs shall be removed within 30 days after the final <br /> site stabilization is achieved or after the temporary BMPs are no longer needed. Trapped <br /> sediment shall be removed or stabilized on site. Disturbed soil resulting from removal of BMPs <br /> or vegetation shall be permanently stabilized. <br /> 3.1.12 Element #12 — Manage the Project <br /> ' Erosion and sediment control BMPs for this project have been designed based on the following <br /> principles: <br /> • Design the project to fit the existing topography, soils, and drainage <br /> patterns. <br /> ' ■ Emphasize erosion control rather than sediment control. <br /> ■ Minimize the extent and duration of the area exposed. <br /> Keep runoff velocities low. • <br /> • Retain sediment on site. <br /> ' ■ Thoroughly monitor site and maintain all ESC measures. <br /> ■ Schedule major earthwork during the dry season. <br /> In addition, project management will incorporate the key components listed below: <br /> As this project site is located west of the Cascade Mountain Crest, the project will be managed <br /> according to the following key project components: <br /> ' Phasing of Construction <br /> • The construction project is being phased to the extent practicable in order <br /> ' to prevent soil erosion, and, to the maximum extent possible, the <br /> transport of sediment from the site during construction. <br /> ' 10 16580.006.doc <br />