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January 28 2010 9 093-93256.100 <br />3.10 Element #10 - Control Dewatering <br />There will 6e no dewatering operations required as part o( this conslruction project. <br />3.11 Element #11 - Maintain BMPs <br />All temporery a�d peimanent erosion and sediment controi BMPs wiil be maintained and repaired as <br />needcd to ensure continued peAormance of their intended fundion. Maintenance and repair �hall be <br />conducted in accordance with each particular BMP's specifiwtions. Visual moNtoring of the BMPs will he <br />conducted at least once every calendar week and within 24 hours o( any rainfall event that causes a <br />discharge from the site. If the site becomes inactrve and is temporari�y stabilized, the inspeclion <br />trequency will be reduced lo once every month. <br />All temporary erosion and sediment control BMPs will be removed within 30 days aRer the fnal site <br />stabilizalion is achieved or aher the temporary BMPs are no ionger needed. Accumulated sedimenl will <br />6e removed or stabilized on site. Disturbed soil resulting Irom removal of BMPs will be permanently <br />stabilized. <br />3.12 Element #12 • Manage the Project <br />Erosion and sedimenl control BMPs lor this project have been selected 6ased on the following general <br />principles: <br />■ Emphasize erosion control ralher than sedimenl control. <br />■ Minimize the extent and duraGon oi the area exposed. <br />■ Keep runoff velocilies low. <br />■ Retain sediment on sita. <br />■ Thoroughly monitor site and maintain all ESC measures. <br />■ Schedule major earthwork during the dry season. <br />As this pro�ecl site is localed west of Ihe Cascade Mountain Crest, the pro�ect wtll be managed accordmg <br />to lhe following approaches: <br />3.12.1 Sequenceo/Construction <br />■ Cap placemenl ac6vities will be controlled to a large extent by the geotechnical properties <br />of the soii. Due lo the moisWre and compadion requirements for Ihe planned fi�llcap <br />material, work cannol proceed wilh overty wet material, and therefore fAllwp placement <br />operalions will of necessiry only be peAormed during relalively dry conddions. <br />■ This project is being constructed in a closed depression thal will be modifetl to provide <br />drainage to the wesL Therefore, pnor to beginning ma�or soit placement activilies, <br />appropriate ESC measures (e.g., silt fence, etc.) wdl be put in place at these potential <br />discharge points lo prevent sedlment release irom Ihe work area. <br />3.12.2 Seasonal Work Limitations <br />■ Major earthwork activities will be limited to the period Irom May 1 through September 30 <br />unless the CESCL determines that sediment-laden runott will be prevented from leavmg <br />the sile through a combination of the tollowing� <br />