Photo courtesy of Stephen McGrath - Westhampton Fire Department   Goshen firefighters responded to a mutual aid call from Easthampton Fire with the Hampshire County Air Supply truck early Sunday morning.   Easthampton firefighters responded to the initial call at 5-7 Arlington Street in their city for a structure fire which came in just after midnight.  According to reports from the scene, a working fire was discovered on the back porch that was making its way into the main portion of the building.  A second alarm was sounded which brought firefighters from Northampton, Southampton and Westhampton to the scene.  Firefighters from Williamsburg were called to do station coverage for Northampton.   As a result of an interior attack of the fire, twenty-one SCBA (Self-contained Breathing Apparatus) air bottles were filled over a 4-hour period.  Most of the bottles were of the 4,500-PSI variety, which provide firefighters with approximately 45 minutes of air when donned. (April 8, 2007)