1502 100TH ST SW 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 fence the limits of cleanngldisturbance (BMP C103) prior to any uther construc6on activity The engineenng plans locate and provide the square (ootages for the areas of grading. clearing, impervious surfaces and un-disturbed areas on the proposed sde As much of ihe natural vegetation as possible will be pre�erved on this pro�ect (BMP C101) Approximately 100"/0 of the entire site will be cleared or disturbed for this pro�ect 2 Estabhsh Consiruction Access The SWPPP calls for ihe proposed construction entrance (BMP C105) to be installed as ihe second step after the staking of clearing limits Since this pro�ect will utilize the existing sde access on the property this feature will not require any excessive grading to �nstall, will be available immediately and may require some maintenance to ensure proper function during the site work A1 this fime winter work is expected dunng ihe wet season 3. Conirol Flow Rates Th�s pro�ect is below the thresholds requinng flow control fo! ihe pro�ect. 4 Install Sediment Controls This site SWPPP proposes to construcUmaintain a gravel entrance (BMP C105). vegetative buffer (BMP C102), silt tencing (BMP C233) and retention of the existing vegetat�on (BMP C 101� thal will provide a vegelated stnp around the work area and any ad�acent property line The construction of ihese features should be completed be(ere the cleanng and grading of the sde Mulch (BMP C121) wdl also be used on the exposed soil as necessary to hmit erosion In addi�ion, streels shall be cleaned as needed at the end oi each work day or through out the day rf diit and debris is tracked onto ihe paved surfaced. 5 Stabilize Soils The "Construction Sequence" calls for the stabilizatlon of soils that remam unworked for certain lengths of time based on the time o( year. Bare/disturbed soils shall remain uncovered or un-stabiLzed for no more than 2 days from Oct. 1 - April 30 and no more than 7 days from May 1 - Sept 30. 5tabilization techniques may include but not limited to mulchmg (BMP C121), plastic sheeting (BMP C123) or hydroseeding (BMP C120�, notes have been added to the plan regarding protection for ihe stock pile area if necessary A stockptle area has been idenGfied on the SWPPP and is setback a minimum of 25-feet from any down slope property Ime In adddion dunng dry penods soil should be cuvered or wetted (BMP C140) to reduc.: the production of dust 6 Protect Slopes All disturbed slopes on site dunng construction are re�wred to be protected with mulch (BMP C121) or other means as spenfied in the construction sequence hke suriace roughenir�g (BMP C130) No concentrated runoff or significar�t amounts of sheet flow wdl be directed to new cut or fill slopes during consiruction (BMP C206) 7 Protect Drain Inlets The runoff (rom this pro�ect to the west withm the R O W. will pass over a vegetated shoulder/swale before being collected by an existing CB This will prov�de the necessary protec6on of ihe downstream system from sediment laden runoff Siit socks may be added to the downstream CB d needed dunng construction Adau 100'r, I o1 7 SFR 12-12U5-7 �(� De;: 2012 Page � �� . \/�+ I