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July 28, 1988 Supplemental Guidance on Implementing the North County Prevention of Significant Deterioration (PSD) Remand 8.27The memo discusses 2 issues that have arisen from the Administrators remand decision in the North County PSD permit appeal, and that are beyond the scope of the September 22, 1987, document providing initial guidance on the subject.
(1) Although BACT is determined case-by-case, the
permitting authority must consider the full range
of pollution control options available and choose
the most effective means of limiting emissions,
unless shown compelling reasons of economic or
(2) Emission of noncriteria pollutants should be evaluated carefully, including consultation with the sources listed. Where a municipal waste combustor is involved, OAQPS has provided rather detailed guidance on methods to factor air toxics considerations into the BACT decision.
(3) In the public notice, the level of detail and identification of specific toxic substances should be consistent with the concern posed by the air toxics.