Laserfiche WebLink
BMP and <br />Infeasibility description <br />applicable lists <br />Infeasibility criteria <br />and rationale for each <br />BMP not selected <br />T5.14A <br />The fallowing criteria can he cited as reasons for infeasibility without <br />NO ROOFS <br />Bioretention <br />further justification (though some require professional services to <br />or Rain Gardens <br />make the observation): <br />(continued) <br />❑ Where land for Bioretention is within an erosion hazard, or <br />landslide hazard area. <br />❑ Where the site cannot be reasonably designed to locate <br />bioreterdion areas on slopes less than 8 percent. <br />❑ Within 50 feet from the top of slopes that are greater than 20 <br />percent and over 10 feet of vertical relief. <br />❑ For properties with known soil or groundwater contamination <br />(typically federal Superfund sites or state cleanup sites under the <br />Model Taxies Control Ad [MTCAJ): <br />• Within 100 feet of an area known to have deep soil <br />contamipal <br />• Where groundwater modeling indicates infiltration will <br />likely increase or change the direction of the migration of <br />pollutants in the groundwater. <br />• Wherever surface soils have been found to be <br />contaminated unless those soils are removed within 10 <br />horizontal feet from the infiltration area. <br />• Any area where these facilities are prohibded by an <br />approved cleanup plan under the date MTCA or Federal <br />Supedund Law, or an environmental covenant under <br />Chapter 64.70 RCW. <br />❑ Within 100 feet of a closed or active landfill. <br />❑ Within 10 feet of an underground storage tank and connecting <br />underground pipes when the capacity of the tank and pipe system <br />is 1,100 gallons or less. As used in these criteria, an underground <br />storage tank means any tank used to store petroleum products, <br />chemicals, or Hand hazardous wastes of which 10 percent or more <br />of the storage volume (including volume in the connecting piping <br />student) is beneath the ground surface. <br />❑ Within 100 feet of an underground storage tank and connecting <br />underground pipes when the capacity of the tank and pipe system <br />Is greater than 1,100 gallons. <br />City of Everett Public Works <br />Small Project StOrmwater Site Plan Report Dec 2019 <br />