5105 CHINOOK DR 2016-01-01 MF Import

B. SWPPP Minimum Elements 1: Preserve Vegetation and Mark Clearing Limits The first step in the construction process is for the contractor to (ence the limits of clearing/disturbance (BMP C103) prlor to any olher construction activity. The engineering plans locate and provide ihe square footages for the areas of grading, clearing, impervious surfaces and un-disturbed areas on the proposed site. Large amounts of natural vegetation will be preserved on fhis project (BMP C101). Approximately 63% oi the entire site will be cleared or disturbed for this project. 2: Establish Construction Access The SWPPP calls for the proposed construdion entrance (BMP C105) to be installed as the second step after the staking of clearing limits. Since this project will utilize the level area on the property to the south lhis fealure wifl not require any excessive grading to install, will be available immediately and may require some maintenance to ensure proper function during the site woric. At this time winter work is expected during the wet season 3: Control Flow Rates This project is below the thresholds requiring flow control for the project. 4: Install Sediment Controls This site SWPPP proposes to construct/maintain a gravel entrance (BPJIP C105), vegetative buffer (BMP C102), silt fencing (BMP C233) and retention of the existing ' vegetation (BMP C101)that will provide a vegetated strip between the cleared areas and any downslope property line. The construction of these features should be completed betore the clearing and grading of the site. Mulch (BMP C121) will also be used on the exposed soil as necessary to limit erosion. In addition, streets shall be cleaned as needed at the end oi each work day or through out the day if dirt and debris is tracked onto the paved suriaced. 5� Stabilize.Soils� �' • The "Cons�ructiop Sequence" calls for the stabilization of soils that remain unworked for cerlain IengfAs of'iime based on the time of year. Bare/disturbed soils shall remain uncovered or'un-stabilized (or no more than 2 days from Oct. t -April 30 and no more than 7 days from May 1 - Sept. 30. Stabilization lechniques may include but not limited to mulching (BMP C121), plastic sheeting (BMP C123) or hydroseeding (BMP C120), notes have been added to Ihe plan regarding protection for the stock pile area if necessary. A stockpile area has been identified on the SWPPP and is setback a minimum of 25-feet from any down slope property line. In addition, during dry periods soil should be covered or wetted (BMP C140) to reduce the production of dust. 6: Protect Slopes All disturbed slopes on site during construction are required to be protecfed with mulch (BMP C121) or other means as specified in the construction sequence like surface roughening (BMP C13G) No concentrated runoft or significant amouNs of sheet flow will be directed to new cut or fill slopes during construction (BMP C206). 7: Protect Drain Inlets No new or existing culverts are proposed or affected by lhis project. ' --- - - ----. . -- -- -- ---- -- - ------ ----- --- Chinook SFR 17.•013 Feb. 2012 pa��. . - ------ �-- - - � /J A.�:'>�