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April 11, 1978 Offset Policy - Marathon Oil Company, Garyville, Louisiana 25.7

Ecol Received a permit for a new refinery but failed to complete construction and sold out to Marathon. marathon revised the proposal and obtained a new permit in October 1977, which allowed in excess of 100 tons per year of hydrocarbon emissions. The permitted but never constructed facilities may or may not be permissible as offset sources.

Credit for offset is conditional on whether the original permit issued to Ecol was consistent with the requirements of 51.18. If the original permit is determined to be valid, that is, emissions from the permitted source would not have interfered with the attainment or maintenance of any NAAQS or SIP, then those portions of the facility which have not yet been constructed may be used as emission offsets. If the permit was not issued consistent with 51.18, no emission offsets are available to Marathon.

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