“Aquifer” means a body of soil or rock that contains sufficient saturated material to conduct groundwater and yield usable quantities of groundwater to springs and/or wells.

“Best management practices (BMPs)” means the physical, structural and/or managerial practices that use the best available technologies or techniques, either separately or in combination, to prevent or reduce the degradation of any critical area or natural resource as set forth in accordance with IMC 13.29.020(A), best management practices, for the purposes of the CARA.

“Critical aquifer recharge areas (CARAs)” means areas that are determined to have a critical recharging effect on aquifers used as a source for potable water, and are vulnerable to contamination from recharge, as identified in the City’s Critical Aquifer Recharge Area Classification Map, on file with the Planning Department.

“Deleterious substances” include, but are not limited to, chemical and microbial substances that are not classified as hazardous materials per this chapter, whether the substances are in usable or waste condition, that have the potential to pose a significant groundwater hazard, or for which monitoring requirements or treatment-based standards are enforced under Chapter 246-290 WAC.

“Hazardous materials” means any material, either singularly or in combination, that is a physical or health hazard, whether the materials are in usable or waste condition; and any material that may degrade surface water or groundwater quality when improperly stored, handled, treated, used, produced, recycled, disposed of, or otherwise mismanaged. Hazardous materials shall also include: all materials defined as or designated by rule as a dangerous waste or extremely hazardous waste under Chapter 70.105 RCW and Chapter 173-303 WAC; hazardous materials shall also include petroleum or petroleum products that are in liquid phase at ambient temperatures, including any waste oils or sludges.

“Hazardous materials inventory (HMI)” is an inventory of all current and anticipated types and quantities of hazardous materials that will be stored, handled, treated, used, produced, recycled, or disposed of at a facility as required in IMC 13.29.020(B), Hazardous Materials Inventory (HMI).

“Hazardous materials management plan (HMMP)” is a plan completed by the operator that demonstrates how the facility implements required BMPs as required in IMC 13.29.020(C), Hazardous Materials Management Plan (HMMP).

“MSDS sheets” means material safety data sheet (MSDS), a form containing data regarding the properties of a particular substance. A component of workplace safety, it is intended to provide workers and emergency personnel with procedures for handling or working with that substance in a safe manner, and includes information such as physical data (melting point, boiling point, flash point, etc.), toxicity, health effects, first aid, reactivity, storage, disposal, protective equipment, and spill handling procedures.

“Wellhead protection area (WHPA)” means the surface and subsurface area surrounding a well or well field that supplies a public water system through which contaminants are likely to pass and eventually reach the water well(s) as designated under the Federal Clean Water Act. (Ord. 2500 § 2, 2007).