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EROSION CONTROL ELEMENT # 5 - Stabilize Soils <br /> Requirements_ Stabilize Soils <br /> 1. From October 1 through April 30,no soils shall remain exposed and unworked for more <br /> than 2 days.From May 1 to September 30,no soils shall remain exposed and unworked <br /> for more than 7 days. This condition applies to all soils on site,whether at final grade <br /> or not. These time limits may be adjusted by the city if it can be shown that the <br /> average time between storm events justifies a different standard. (Requests to modify <br /> these timeframes must be made in writing and approved by the City of Bellevue before <br /> any deviation in these erosion control measures is permitted.) <br /> 2. Soils shall be stabilized at the end of the shift before a holiday or weekend if <br /> needed based on the weather forecast. <br /> 3. Soil stockpiles must be stabilized from erosion,protected with sediment trapping <br /> measures and when possible,be located away from storm drain inlets,waterways <br /> and drainage channels. <br /> 4. Linear construction activities,including right-of-way and easement clearing,roadway <br /> development,pipelines, and trenching for utilities, shall be conducted to meet the <br /> soil stabilization requirements. Contractors shall install the bedding materials, <br /> roadbeds, structures, pipeline, or utilities and re-stabilize the disturbed soils so <br /> that: <br /> From October 1 through April 30 no soils shall remain exposed and <br /> unworked for more than 2 days and <br /> From May 1 to September 30,no soils shall remain exposed and unworked <br /> for more than 7 days. <br /> Soil stabilization measures should be appropriate for the time of year,site conditions,estimated <br /> duration of use,and potential water quality impacts that stabilization agents may have on <br /> downstream water or ground water.Applicable practices include,but are not limited to, <br /> temporary and permanent seeding, sodding,mulching,plastic covering, erosion control <br /> fabrics and matting,soil application of polyacrylimide(PAM),the early application of <br /> gravel base on areas to be paved,and dust control. <br /> The following Best Management Practices,(BMPs),the ones that the Contractor will implement on <br /> site,to meet the erosion control requirements listed above: <br /> 9 <br />