Abstract: An apparatus and method to present developing incidents to a user in accordance with a selected criteria. Where the incidents correspond to developing gas concentrations, gas samples can be compared to a selected threshold, and responsive to the comparison, a concentration indicating display, relative to a selected region being monitored, can be presented to a user. The displayed concentration indicating elements, in response to real-time samples, can expand on the visual presentation indicating the characteristics of a developing incident. Stored historical information can be represented for after action analysis.