ECO applies to employers within the Portland Air Quality Maintenance Area (AQMA) with more than 100 employees at a work site. The Portland Air Quality Maintenance Area is defined in Oregon Administrative Rules (OAR) 340-204-0010 and is illustrated in Figure 1.
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Or. Admin. Code § 340-242-0020
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Statutory/Other Authority: ORS 468.020
Statutes/Other Implemented: ORS 468A.363