Sep 24, 2013 12:16 AM by Stefanie Boe

More details on Marana fire

MARANA - A fire at Vulcan Materials in Marana Monday afternoon was put out thanks to foam.


Northwest Fire District, along with an engine from the Picture Rocks Fire District responded to the Vulcan Materials plant located at 10100 W. Avra Valley Road after plant employees were alerted to a fire in their oil storage tanks. The call came in at 2:22pm which sent a first alarm HazMat response.

When the first engine arrived, large amounts of fire and heavy smoke were coming for two (2) 3500 gallon storage tanks. These tanks contained oil and liquid oil products with polymers within the mixture used for the production of asphalt. There were also two (2) 1000 gallon propane tanks within 125 feet of the fire which are used to heat burners that keep the oil products hot during the asphalt.

Initial crews attempted to extinguish the flames and keep the fire from spreading to the large propane tanks. 15 gallons of class B firefighting foam was used by the initial companies to knock down the main portion of fire. Flammable liquids fires are difficult to extinguish with water alone. Firefighting foam is used to suppress vapors and cool the flammable liquids to prevent continued burning. An additional unit was brought into the scene with 55 gallons of class B concentrate. When mixed with water, there was approximately 1000 gallons of foam. This foam operation was successful in extinguishing the flames and began to cool the extremely hot oil.

29 firefighters staffing 4 engines, a ladder company and several support units including three water tenders took 26 minutes to bring the fire under control. No injuries to plant operators or firefighters reported.

Investigators were still on scene to determine the cause of the fire.


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