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BMP and Infeasibility description <br /> applicable lists Infeasibility criteria and rationale for each <br /> BMP not selected <br /> T5.11" ❑ Site setbacks and design criteria provided in BMP T5.12 <br /> Sheet Flo:: (SWMMWW V4.1)cannot be achieved. <br /> ❑ Positive drainage for sheet flow runoff cannot be achieved. <br /> 54 At Area to be dispersed(e.g.,driveway,patio)cannot be graded to <br /> have less than a 15 percent slope. <br /> ❑ At For flat to moderately sloped areas,at least a 10 foot-wide <br /> vegetation buffer for dispersion of the adjacent 20 feet of <br /> contributing surface cannot be achieved.For variably sloped areas, <br /> at least a 25 foot vegetated flowpath between berms cannot be <br /> achieved. <br /> T5.11 J Site setbacks and design criteria provided in BMP T5.11 <br /> Concentrated (SWMMWWV4.1)cannot be achieved. <br /> Flow Dispersion ❑ A minimum 3 foot length of rock pad and 50 foot flowpath OR a <br /> dispersion trench and 25 foot flowpath for every 700 square feet of <br /> drainage area followed with applicable setbacks cannot be <br /> achieved. <br /> ❑ More than 700 square feet drainage area drains to any dispersion <br /> device. <br /> City of Everett Public Works <br /> Small Project Stormwater Site Plan Report-Dec 2019 36 <br />