At 15:20 this yesterday afternoon District 1 companies we’re dispatched to The Somerset Hotel for a reported dumpster fire. While en route companies were advised the dumpster was heavily involved and under the building. With the update Car 562 requested a 2nd alarm box 2601. Car 562 arrived on scene and confirmed a working fire with extension to the building. Engine 562 arrived and laid a supply line to Engine 8. The crew then pulled additional lines to assist in fire suppression. On their arrival crews from Engine 561 and Van 56 assisted in checking for extension , ventilation. Once the bulk of the fire all crews worked on doing extensive overhaul. All units were on scene for approximately 1 1/2 hours. Great stop by the first arriving companies , and thank you to the mutual aid and cover companies.