City of Spokane

Spokane Municipal Code

***Note: Many local criminal codes can now be located under Chapter 10.60 SMC while others are now cited under the Revised Code of Washington (RCW), which was incorporated into the municipal code in 2022. (See SMC 10.58.010). Code Enforcement, including Noise Control and Animal Regulations are located in Chapters 10.62 through 10.74.

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Title 17E
Chapter 17E.010
Section 17E.010.560
 

Title 17E Environmental Standards

Chapter 17E.010 Critical Aquifer Recharge Areas – Aquifer Protection

Article IV. Aboveground Storage Tanks

Section 17E.010.560 Aboveground Bulk Storage of Critical Materials

  1. In addition to the containment prescribed in SMC 17E.010.095 and the requirements of WAC 173.180A, new facilities with aboveground tanks having an individual net storage capacity of one hundred thousand gallons or more of critical materials shall include special provisions to insure that the facilities will meet API Standard 2610 for design, construction, operation, maintenance and inspection of terminal and tank facilities and that such facilities shall include provisions for containment for the following:

    1. Pipes, pumps and valves associated with carrying critical materials to or from the storage facility. Insofar as possible these facilities will be located aboveground.

    2. Areas where critical materials are transferred from conveyances, such as trucks, rail cars and pipelines, to the bulk storage facilities.

    3. New aboveground tanks for the storage of critical materials with an individual net storage capacity of one hundred thousand gallons or more shall meet the secondary containment requirements outlined in SMC 17E.010.095 and, where applicable, WAC 173.180320. In addition, the following requirements shall apply:

      1. Any new tank installed to store critical materials shall be equipped with a multiple containment system and leak detection.

      2. Any new single-bottom tank constructed of steel or similar material shall have secondary containment, leak detection and cathodic protection installed as an integral part of the tank structure.

        1. “Secondary containment” means a double bottom with interstitial monitoring or an equivalent system of tank liners and leak detection.

      3. Any new tank system installed in compliance with this section shall be within new diked areas totally lined by a multiple containment system composed of material resistant to the chemical stored in the facility having hydraulic conductivity less than 1 x 10-6 centimeters per second at the anticipated hydrostatic loads. Interstitial monitoring shall be provided between the containment layers when appropriate. (Note for interpretation: This means that the secondarily contained tank described in subsection (A)(3)(b) of this section lies within a secondary containment berm creating a multiple containment system.)

      4. Uncovered diked areas shall be constructed to contain one hundred ten percent of the volume of the largest tank within the containment area. Stormwater management for runoff generated within the  diked areas shall conform to the department of ecology’s state general permit and City of Spokane guidelines for stormwater management prior to disposal.

      5. When used for emergency containment of tank contents, dikes shall be designed and constructed to comply with the requirements of NFPA 30.

      6. For any new tank, a tank leak detection system shall be installed and monitored for leakage by visual, mechanical or electronic leak detection methods.

        1. Monitoring reports shall be kept on file for a period of five years and shall be available for review at the request of the critical review officer or designee.

        2. Inspection reports prepared for compliance with WAC173.180D shall be considered adequate for compliance with this section.

  2. Any individual aboveground tank with a net storage capacity of one hundred thousand gallons or more in bulk storage facilities in existence at the time of adoption of the ordinance codified in this section shall be required to meet the following requirements:

    1. Be inspected and repaired as required by API Standard 653; and

    2. Meet the compliance schedule as required by the existing United States department of transportation, United States environmental protection agency and Washington department of ecology regulations.

      1. Tanks inspected and upgraded in compliance prior to the adoption of this regulation shall be re-inspected and upgraded in accordance with this section within ten years of the initial inspection; and

    3. Be upgraded, when the tank is emptied for inspection and repair in accordance with the applicable compliance schedule (SMC 17E.010.560 B (1) and (2)), to include a coated, cathodically protected single bottom and undertank leak detection, a double bottom and with interstitial monitoring or an equivalent system of tank bottom lining, leak detection and interstitial monitoring; and

    4. When the tank is upgraded, the bermed area around the tank shall also be upgraded.

      1. The bermed area outside the footprint of the tank shall be equipped with a multiple containment system composed of two or more layers of material with a hydraulic conductivity less than 1 x 10-6 centimeters per second at the anticipated hydrostatic loads.

      2. The multiple containment layers of the bermed areas shall be sealed to the tank to prevent any spilled or leaked material from migrating under the tank; and

    5. Uncovered diked areas shall be constructed to contain one hundred ten percent of the volume of the largest tank within the containment area. Stormwater management for runoff generated within the diked areas shall conform to the department of ecology’s state general permit and City of Spokane guidelines for stormwater management prior to disposal; and

    6. When upgraded, pumps, pipes and other facilities associated with tanks shall be placed aboveground within bermed containment areas as described in subsection (B)(4) of this section or be replaced with double- walled units with interstitial monitoring at the time the tank containment is upgraded.

      1. Aboveground facilities shall be protected from impact with vehicles and machinery by protective walls or bollards.

      2. Pumps, pipes and other facilities not within secondary containment areas shall be pressure tested at least once a year.

      3. Records of pressure testing shall be kept on file for at least five years.

    7. The facility shall be upgraded to multiple containment standards described above if such tank is relocated.

  3. Retrofitting an aboveground tank with an individual net storage capacity of one hundred thousand gallons or more with multiple containments shall require a permit from the fire department.

  4. Annual inspection of aboveground tanks with an individual net storage capacity of one hundred thousand gallons or more shall be conducted to verify that:

    1. required secondary containment facilities are maintained,

    2. clean-up materials and equipment needed to implement clean-up plans are available, and proper notification of leaks and spills occurs. Inspection reports shall be kept on file for a period of five years and shall be made available for review at the request of the fire department. Inspection reports prepared for compliance with WAC 173.180.035 shall be considered adequate for compliance with this section.

Date Passed: Monday, June 13, 2016

Effective Date: Wednesday, July 27, 2016

ORD C35399 Section 30