GCCEC produce new scoring volumes for the cavern background simulation team, SLAC, Stanford. Services for the liquid argon cooling system in Barrel calorimeter gap region were considered. GCCEC engineers collect 2D drawings from CERN CDD and Smarteam servers and built detailed 3D CATIA model of cooling system. After 3D CATIA model was transferred into C++ codes for GEANT application. All materials were submitted on weekly SLAC meeting on Tuesday, 3rd of August, 2010. Development of new scoring volumes for ATLAS software collaboration is one of the direction of GCCEC activity with CERN ATLAS, starting from 2010 according to agreement 347-09.