Providing one or more virtual talk groups to an endpoint includes establishing one or more resources of a user endpoint. The a hose and nozzle assembly includes a hose comprising flexible-plastic tube having; a proximal end; and a distal end; a nozzle comprising rigid-plastic having a first end and a second end comprising a hooked-end; a controller for controlling flow of water through the hose and nozzle assembly; and attachers comprising at least one suction cup. A discrimination information sending part returns the other discrimination information to an electronic certificate issue apparatus. The method and system of the present invention also may employ a series of rotary screw compressors to process natural gas containing a plurality of contaminants.