§ 69.41 New exemptions.

(a) Pursuant to section 325(a) of the Clean Air Act and a petition submitted by the Governor of the Virgin Islands, an exemption to section 123 of the Clean Air Act is granted to the Hess Oil Virgin Islands Corporation (HOVIC) at the St. Croix refinery. Specifically, the exemption waives the prohibition on the implementation of an Intermittent Control Strategy (ICS) based upon atmospheric conditions in order to set emission limitations. The emission limitations shall depend upon the sulfur content in the residual oil burned at the refinery.

(b) The protocol to be followed for the ICS shall be set forth in a Prevention of Significant Deterioration of Air Quality (PSD) permit issued to HOVIC; and shall include as a minimum, the conditions listed in paragraphs (b)(1), (b)(2), (b)(3), and (b)(4) of this section.

(1) HOVIC shall maintain a meteorological tower on its property for the purpose of the ICS which meets the required EPA QA/QC operating specifications. At a minimum, the wind direction data will be monitored, collected and reported as 1-hour averages, starting on the hour. If the average wind direction for a given hour is from within the designated sector, the wind will be deemed to have flowed from within the sector for that hour. Each “day” or “block period”, for these purposes will start at midnight and end the following midnight.