Tank Filler Pipe And Cap problems of the 2011 Hyundai Santa Fe

2011 hyudai veracruz new vehicle has discharged heavy fuel fumes and odors outside and inside the vehicle creating a possible potential for fire/explosion and causing obnoxious if not hazardous breathing. 12/31/2010 shortly after purchase, check engine light illumnated 01/01/2011 at start-up, there was a "pop" and engine started. Replicated at dealership and raw gas was smelled. Dealer kept vehicle for service shop to open on 01/03/2011. 01/03/2011 dealer replaced purge control valve (p/n 28910-3c100). Took vehicle, smelled gas fumes in garage @ residence. No check engine light. 01/04/2011 returned vehicle to dealership. Part ordered air freight. 01/05/2011 dealer installed fuel tank air filter (p/n 31543-3j501-r). Took vehicle home, smelled gas fumes in garage @ residence. No check engine light. 01/06/2011 fumes in garage not present. Thought issue corrected. Fueled vehicle, ran errands, smelled fuel outside vehicle. Had lunch, smelled fuel inside of car. Not previuosly smelled inside vehicle. Returned to dealership. 01/07/2011 dealer advises that they are dismantling vehicle about the fuel fill area to explore for defects.