40 CFR § 52.634
Particulate matter (PM-10) Group III SIP
June 9, 2020
(a) On September 14, 1988, the Governor of Hawaii submitted a revision to the State Implementation Plan (SIP) for implementing the required monitoring activities and other tasks necessary to satisfy the requirements of the PM-10 Group III SIP.
(b) The Hawaii Department of Health has committed to meet the ongoing requirements for PM-10 Group III areas.
[55 FR 18110, May 1, 1990]