Calumet Inc. (NASDAQ: CLMT) reported that its Shreveport facility experienced unplanned maintenance during the first quarter after discovering organic chlorides in feedstock tanks, according to a company statement.

Operations across significant portions of the facility were temporarily suspended to protect employees and equipment. The outage resulted in a loss of approximately 750,000 barrels of production. The company is conducting an investigation with third-party experts to determine the source of the organic chlorides, which are contaminants that can cause severe corrosion, fouling, and catalyst damage when exposed to high temperatures.

Following extensive product testing, asset inspection, and equipment repairs, the Shreveport facility has resumed full operations and is processing over 50,000 barrels per day of feedstock.

Separately, Montana Renewables planned shutdown for its MaxSAF expansion and turnaround activities began the week of March 2 and is expected to last approximately 48 days. The project is more than 70% complete and remains on time and budget, according to the company.

Calumet manufactures specialty branded products and renewable fuels and operates twelve facilities throughout North America. The company is headquartered in Indianapolis, Indiana.