Underground Storage Tank Removal and Disposal, Dawley Property, Alaska

Brice performed the removal and disposal of an underground storage tank from a residential property located in Sequim, Washington. The approximate UST location was determined by a fill port observed during demolition of a deck attached to the residence. Brice was informed that the UST contained approximately 200 gallons of heating oil, and the UST was assumed to be 500 gallons in capacity.

Brice mobilized to the site and conducted site cutting, clearing and excavation to expose the UST. We collected confirmation samples from the floor and sidewalls of the excavation for submission to an approved laboratory for analysis of diesel range organics (DRO). We implemented a Mini-RAE 3000 photoionization detector (PID) to monitor the ambient air and field screen soil samples. After the UST was exposed and ventilated, we removed the initial tank contents with a stinger and vacuum lift system. The UST was observed to be nearly full. Two 55-gallon drums were filled with heating oil. An assessment of the product level in the UST indicated the remaining contents exceeded the anticipated 200 gallons, and additional drums for the product disposal were needed.