Engine Company 733 was dispatched to 610 Ryan Avenue, in the 295 Industrial Park from an exterior gas leak. A delivery truck struck a high pressure gas main which supplies a back up generator. As crews were investigating to verify that there was no active leak, Chief 701 was relaying the information directly to PSE&G Gas Division as they arrived on location. Gas to the generator was secured and the building was checked for any potential hazards which were negative. Scene was turned over to PSE&G and Westville Police.