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“Habitat conservation areas of local importance” means a seasonal range or habitat element with which a given species has a primary association, and which, if altered, may reduce the likelihood that the species will maintain and reproduce over the long term. These might include areas of high relative density or species richness, breeding habitat, winter range, and movement corridors. These might also include habitats that are of limited availability or high vulnerability to alteration, such as wetlands.

“Hazardous substance(s)” means any liquid, solid, gas or sludge, including any material, substance, product, commodity or waste, regardless of quantity, that exhibits any of the characteristics of hazardous waste, including waste oil and petroleum products.

“Hazardous substance processing or handling” means the use, storage, manufacture or other land use activity involving hazardous substances, but does not include individually packaged household consumer products or quantities of hazardous substances of less than five gallons in volume per container.

“Hazardous waste” means all dangerous waste and extremely hazardous waste as designated pursuant to Chapter 70.105 RCW and Chapter 173-303 WAC.

(a) Dangerous Waste. “Dangerous waste” means any discarded, useless, unwanted, or abandoned substances including, but not limited to, certain pesticides, or any residues or containers of such substances which are disposed of in such quantity or concentration as to pose a substantial present or potential hazard to human health, wildlife, or the environment because such wastes or constituents or combinations of such wastes:

(i) Have short-lived, toxic properties that may cause death, injury, or illness or have mutagenic, teratogenic, or carcinogenic properties; or

(ii) Are corrosive, explosive, flammable, or may generate pressure through decomposition or other means.

(b) Extremely Hazardous Waste. “Extremely hazardous waste” means any waste which:

(i) Will persist in a hazardous form for several years or more at a disposal site and which in its persistent form presents a significant environmental hazard and may be concentrated by living organisms through a food chain or may affect the genetic makeup of humans or wildlife; and

(ii) Is disposed of at a disposal site in such quantities as would present an extreme hazard to humans or the environment.

“Hazardous waste treatment and storage facility” means a facility that treats and stores hazardous waste and is authorized pursuant to Chapter 70.105 RCW and Chapter 173-303 WAC; including all contiguous land and structures used for recycling, reusing, reclaiming, transferring, storing, treating, or disposing of hazardous waste.

“Hydric soil” means soil that is saturated, flooded or ponded long enough during the growing season to develop anaerobic conditions in the upper portions of the soil profile.

“Hydrogeologic assessment” means a report detailing the subsurface conditions of a site and which indicates the susceptibility and potential for contamination of groundwater supplies. [Ord. 4525 § 1, 2021; Ord. 3911 § 2, 2009; Code 1970 §§ 28.08.150 – 28.08.180.]