Background

Spokane, Washington was designated nonattainment for PM₁₀ and classified as a moderate nonattainment area upon enactment of the 1990 Clean Air Act amendments.

Washington submitted a PM₁₀ attainment plan for Spokane on December 12, 1994 which EPA approved on January 27, 1997 (62 FR 3800 (PDF)(4 pp, 131 K, About PDF)).

On November 30, 2004, Washington submitted a PM₁₀ Limited Maintenance Plan (LMP) and redesignation request for Spokane. EPA approved the LMP and redesignated the area to attainment on July 1, 2005 (70 FR 38029 (PDF)(10 pp, 182 K)).

On April 12, 2016, the EPA determined that the area continues to meet the LMP criteria and approved minor updates to Spokane Regional Clean Air Agency Regulation I, sections 6.05, 6.14, and 6.15 related to the LMP. (81 FR 21470 (PDF)(3 pp, 237 K)). 

Summary

The LMP continues to rely on control strategies contained in the attainment plan. The strategies focus on control of residential wood smoke combustion and controlling fugitive dust from paved and unpaved roads.

Rules

• SCAPCA Section 6.05, Particulate Matter & Preventing Particulate Matter from becoming Airborne
• SCAPCA Section 6.14, Standards for Control of Particulate Matter on Paved Surfaces
• SCAPCA Section 6.15, Standards for Control of Particulate Matter on Unpaved Roads
• SCAPCA Article VIII, Solid Fuel Burning Device Standards
• WAC 173-433, Solid Fuel Burning Device Standards 

Resolutions and Orders

• City of Spokane Resolution 90-93, October 8, 1990, Street Paving
• City of Spokane Resolution 91-42, June 17, 1991, Six Year Comprehensive Street Program
• City of Spokane Resolution 93-43, May 10, 1993, Street Sweeping & Reduced Use of Sanding Materials
• Spokane County Resolution 90-1219, October 9, 1990, Street Paving
• SCAPCA Order No. 91-01, December 12, 1991, Alternate Opacity Limit for Kaiser Aluminum
• SCAPCA Order No. 96-03, October 4, 2000, Limiting Potential to Emit, Kaiser Aluminum
• SCAPCA Order No. 96-04, April 24, 1996, Limiting Potential to Emit, Kaiser Aluminum
• SCAPCA Order No. 96-05, October 4, 2000, Limiting Potential to Emit, Kaiser Aluminum
• SCAPCA Order No. 96-06, October 19, 2000, Limiting Potential to Emit, Kaiser Aluminum

Contingency Measures

• SRCAA section 6.15G, Particulate Matter & Preventing Particulate Matter from becoming Airborne
• SRCAA section 8.07.A.5, Curtailment (Burn Ban) 
• SRCAA section 8.09, Procedure to Geographically Limit Solid Fuel Burning Devices 
• SCAPCA Zoning Code Ordinances 4.17.059 and 4.802.080, May 24, 1990, Paving of New Parking Lots

EPA Effective Date

May 12, 2015