The Dallas, Texas, firm is updating the permit to alter the maximum pound per hour emission rates; to include toxic air pollutant emissions not included in the previous permit; and correct and add emission point information.
The La. Department of Environmental Quality will receive written comments on the permit application or requests for a hearing until 12:30 p.m. April 26.
Annual estimated emissions in tons will for the most part decline under the new permit.
Toxic Air Pollutants not previously permitted but include in the renewal application are 1,3-Butadine, 2,2,4-Trimethylpentane, Acvetaldehyde, Acrolein, Naphthalene and Polynuclear Aromatic Hydrocarbon, all in relatively minute amounts.
The applications provides for substantial increase in n-Hexane discharge, and total TAP increases about 80 percent.
Hexanes are chiefly obtained by refining of crude oil and acute toxicity is relatively low.
The operating permit in question must be renewed every five years under the Enviornmental Protection Act.
Information: Fritz J. Hurst, LDEQ, 225 219-5337.