Polymer blend compositions of a first polymer component comprising an ethylene propylene copolymer and a second polymer component comprising an isotactic polypropylene copolymer. The method incorporates the steps of supplying a sheet of thermographic material m to a thermal processor having a processing chamber, heating the processing chamber to a predetermined processing temperature, and transporting the sheet of thermographic material through the processing chamber in a sinuous way. The support platform defines a recessed channel for carrying a metal retaining bar. At least one target icon is also displayed on the map to represent a target within the battle space. The data in the second database is latched before checking the condition and is unlatched after checking the condition. As foam generation occurs, the escaping gas contacts surfactant in the solution, and creates foam which expands to completely fill the drain pipe.