Madrid, September 26, 2005 - Telvent (NASDAQ TLVT), the Global RealTime IT Company, will be presenting a paper on leak detection at the 37th Annual Meeting of the Pipeline Simulation Interest Group (PSIG) to be held at the Hyatt Regency Hill Country Resort in San Antonio, Texas from November 7-9, 2005. Originally set for October 26 - 28 in New Orleans, the devastation caused by Hurricane Katrina forced the PSIG conference to be rescheduled and relocated to a different host city. Concerning the change in location and date, PSIG issued the following statement, "We appreciate your understanding of this situation. Many lives have been affected by this great tragedy, and our hearts go out to the people of New Orleans and the surrounding areas."

The 2005 PSIG conference will feature a distinguished group of industry experts specialized in pipeline operations, hydraulics, optimization, and transient and two phase flow, who will present the latest technological advances in pipeline modeling applications. One such application, leak detection, is widely acknowledged for its critical impact on environmental safety and operational efficiency.

Not all components of leak detection, however, are necessarily easily or widely deployed. Telvent's paper will focus on one of the most challenging uses of this software application, described as slack-line leak detection. Based on two real world pipelines that encounter various slack conditions, this paper will explore the effects that are important in determining leak thresholds in slack line conditions. Through analysis of the pipeline case studies, the practicality of providing slack-line leak detection with reasonable thresholds and averaging times will be demonstrated. The result is added leak detection protection for pipelines that experience slack conditions during pipeline operation.

The Pipeline Simulation Interest Group is a non-profit group dedicated to promoting information exchange and advancing the state of the art in the areas of modeling, simulation, optimization, transient flow, two phase flow, and related subjects as applied to gas, liquids, and solids pipeline systems.