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<br />(2) Damage an approved road, utility, or public facility;
<br />(3) Prevent emergency access in the case of medical hardship; or
<br />(4) Endanger pedestrians or users of a recreational area
<br />17A.02.406 Hazard Tree Determination Report.
<br />“Hazard Tree Determination Report” means a written document prepared by an arborist or forester
<br />containing the following elements:
<br />1. Parcel, address, and name of landowner of site where tree(s) are located,
<br />2. Description of size, health, and species of tree(s) evaluated,
<br />3. Description of factors related to potential impacts to human health or structures posed by
<br />evaluated tree(s),
<br />4. Alternative methods (pruning, cabling, etc.) considered,
<br />5. Location of nearby critical areas (wetlands, streams, steep slopes, landslides, floodplains,
<br />shorelines, etc.),
<br />6. Proposed methods for removal,
<br />7. Size and species of replacement trees, if any,
<br />8. Site map showing parcel lines, structures, evaluated trees, critical areas, utilities, and other
<br />pertinent information described in the report,
<br />9. Date of field evaluation and signature of arborist or forester,
<br />10. Qualifications of arborist or forester authoring the report.
<br />17A.02.410 Hazardous Substances.
<br />“Hazardous Substances” means any liquid, solid, gas, or sludge, including any material, substance,
<br />product, commodity, or waste, regardless of quantity, that exhibits any of the physical, chemical, or
<br />biological properties described in WAC 173-303-090 or 173-303-100.
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<br />17A.02.430 Hydric Soil.
<br />"Hydric soil" means a soil that is saturated, flooded, or ponded long enough during the growing
<br />season to develop anaerobic conditions in the upper part.
<br />17A.02.440 Hyporheic Zone.
<br />“Hyporheic zone” means the saturated zone located beneath and adjacent to streams that contains
<br />some portion of surface waters, serves as a filter for nutrients, and maintains water quality.
<br />17A.02.450 Impervious Surface.
<br />“Impervious Surface” means a hard surface area which either prevents or retards the entry of water
<br />into the soil surface and subsoils, such as would occur under natural conditions prior to
<br />development, or which causes water to run off the surface in greater quantities or at an increased
<br />rate of flow relative to natural conditions prior to development. Common impervious surfaces include,
<br />but are not limited to: rooftops, walkways, patios, driveways, parking lots, storage areas, concrete or
<br />asphalt paving, gravel roads, packed earthen materials, and oiled macadam, or other surfaces which
<br />similarly impede the natural infiltration of stormwater.
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<br />17A.02.460 In-Stream Structure.
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