a. The owner or operator of any facility or activity shall provide secondary containment for hazardous materials or other deleterious substances in aggregate quantities equal to or greater than 20 gallons liquid or 200 pounds solid or in quantities specified in RMC Chapter 15.06, whichever is smaller.

b. All seams and cracks on Portland cement concrete pad containment or fueling/maintenance areas must be sealed with chemical resistant sealers. Inspect and repair the Portland cement concrete pad annually to ensure the functional integrity of the pad is maintained to prevent fuel and/or chemicals from reaching the ground.

c. Facilities or activities located in Critical Aquifer Recharge Area II are exempt from secondary containment requirements in subsection A.1.a of this section for indoor storage of hazardous materials and deleterious substances. Requirements in RMC Chapter 15.06 still apply.

a. All storm water infiltration systems shall be registered with the Director using the registration form developed by the Director. Certain storm water infiltration systems are regulated by the state as Underground Injection Control (UIC) wells under Chapter 173-218 WAC. The owner or operator of a storm water infiltration system can meet the City’s registration requirement by registering their system with Washington Department of Ecology and providing a copy of the Ecology registration to the Director.

b. Repealed by Ord. 2422.

c. Repealed by Ord. 2422.

d. An assessment of the potential risks to groundwater from any registered storm water infiltration system shall be completed by the owner or operator and submitted to the Director by February 3, 2011. Assessment criteria have been developed by the Director in consultation with affected facility owners or operators. The assessment shall be completed for each storm water infiltration system.

e. If through the assessment process, a storm water infiltration system is determined to pose a potential significant groundwater hazard based on the assessment score, the Director shall issue an Authorized Work Letter detailing the work required to mitigate risks at the facility. Authorized work may include, but not be limited to, best management practices, system modifications, or infiltration system replacement to protect groundwater quality, pursuant to the guidance and schedule in the assessment criteria. If replacement of an infiltration system is required and there are no alternative storm water discharge options available, then in addition to the authorized work, groundwater monitoring will be required, in accordance with the groundwater monitoring requirements in the assessment criteria, until an alternative discharge becomes available. If monitoring results for such a facility indicate contamination of the groundwater at any time, all activities contributing to the contamination shall be required to cease immediately.

f. Provisions to prevent releases of hazardous materials into storm water systems shall be updated in the Hazardous Materials Management Plan, Storm Water Pollution Prevention Plan, or equivalent plan accepted by the Director and supported by upgraded or new storm water system designs, as necessary, to reflect significant changes in types, quantities, and handling of hazardous materials.

g. The owner or operator of a storm water infiltration system shall notify the Director of the intent to modify or replace a storm water infiltration system and shall obtain all appropriate approvals and permits prior to any modification or replacement.

a. All underground storage tanks (USTs) and associated piping more than 30 years old must conduct annual inspections including tank and line tightness testing.

b. Fuel dispensing equipment and above ground storage tanks shall be secondarily contained and protected by bollards. Fuel dispensing equipment hoses shall not extend outside of the containment area.

c. A containment system consisting of the following:

a. The facility shall conduct vehicle maintenance under a covered or indoor area with drainage to the sanitary sewer, a dead-end sump, or alternative Best Management Practices as approved by the Public Works Director.

b. An impervious concrete pad with petroleum resistant sealant. The pad must be sloped/bermed to contain spills within the maintenance area and not allow storm water run-on enter the vehicle maintenance area.

c. The maintenance pad and associated conveyance structures shall be inspected and repaired annually to ensure the functional integrity is maintained to prevent fuel and/or chemicals from reaching the ground. All seams and cracks on the pad and associated conveyance structures shall be sealed with chemical resistant sealers.