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June 18, 1986 Exemption of Dimethyl Acetamide (DMAC) from Regulation Under Prevention of Significant Deterioration (PSD) Review. 5.22Letter reiterates policy on exempt solvents explained in a July 31, 1981, letter from Thomas W. Devine, and contained at 2.18 in this document. Dimethyl acetamide is not exempt from PSD review.
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