2812 BAKER AVE 2023-12-01 - Laserfiche WebLink

Glossary Definitionsare arranged alphabetically by term. Fora complete reference, please see the Stormwater Management Manual for Western Washington (SWMMWW): 9 Best Management Practice The schedules ofactrudes, prohibitions of practices, maintenance procedures, (BMP) and structural andlor managerial practices, that when used singly or in combination, prevent or reduce the release of pollutants and other adverse impacts to wavers of Washington State. Compaction The densification. settlement or packing of soil in such a way that permeability of the soil sreduced. Compost Organic material that has undergone biological degradation and transformation under controlled conditions designed to promote aerobic decomposition at a soli d wastefacility, in compliance with the requirements dChapter 173-350 WAC, or biosolids composted in compliancewith Chapter 173-308 WAC. Compostingua form of organic material recycling. Critical Area Avaminimum.areaswhichincludeweti cads,areazwithacridolrechargingeffect naquifers used for potable water, fish and wildlife habitatconservation areas, frequentlyflooded areas,geologicallyhazardous areas, including unstableslopes. and associated areas and ecosystems. Dispersion Release of surface and srormwater runoff such that the flow spreads over a wide area and is located so as not to allow flow to concentrate anywhere upstream of drainage channel with erodible underlying granular soils. Hard Surface An impervious surface. a permeable pavement are vegetated roof Impervious Surface Anon -vegetated surfaceareawhich eidterpreventsorrerardstheentryofwaterinro the soil mantle as under natural conditions prior to development. Anon -vegetated surface area which causes water to run offthe surface in greater quantities or at an increased rate of flow from the flow present under natural conditions prior to development Common impervious surfaces include, but are not limited to, roof clips, walkways,p pact, driveways, parking lots or storage areas, concrete or asphalt paving, gravel roads, packed earthen materials, and oiled, macadam or other surfaces which similarly impede the natural infiltration of stormwater. Open, uncovered resentioni detention facilities shall not be considered as impervious surfaces for the purposes of determining whether the thresholds for application of Minimum Requirements are exceeded. Open, uncovered reentionudetemion facilities shall be considered impervious surfaces for purposes of runoff modeling. City of Everett Public WOMB SmallPrgedSlomiwaterSitePan Repoli September 2022