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|State Police #||13-04837|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Hydrogen Flouride||D acid cooler||NO||NO||NO||218.0 pounds|
|Sulfur Dioxide||Flare #1||NO||YES||NO||10,360.0 pounds|
Accident Classified As: Reportable Quantity
On October 30, personnel identified increased fluoride levels of routine samples at the battery limits of the Alkylation unit in the cooling water return system from 0.39 parts per million (ppm) to 0.5 ppm. Based on preliminary findings, the "D" acid cooler at the alkylation unit appears to have developed a leak. Sampling conducted at Outfall 013, which measures fluoride concentration, suggests a neutral pH, dilute solution of HF was leaking from a heat exchanger in the cooling water system and discharged through the outfall. CRLLC personnel began to shutdown the unit in order to isolate the cooler on October 31. As a result of the leak and subsequent shutdown of the unit, intermittent flaring occurred at the #1 Flare beginning on October 31 and ending on November 2.
CRLLC had no indication nor could have prevented the exchanger leak from occurring.
The Alkylation Unit was shut down in a safe and controlled manner in order to isolate the acid cooler. The acid cooler is being inspected and repaired to minimize the risk of recurrence. The rates were reduced and the acid was evacuated from the unit. Fluoride samples were measured from the cooling water effluent throughout the shutdown of the unit. The pH of Outfall 013 was continuously monitored.