SITE INFORMATION AND CORRESPONDENCE_FILE 2

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Stantec Incident Summary April 1, 2009 Incident Summary — Southern California High Potential Near Miss . There was a traffic accident that occurred while our groundwater sampling technician and traffic control subcontractor were setting up traffic control at a busy intersection in Southern California. No one from Stantec or our subcontracting company was involved or injured. However, they could.have been injured if they were not following the proper safety practices and/or if the situation occurred under slightly different circumstances. Below is a description of what happened and the hazard recognition that was conducted before the work in the street resumed. A Yukon was travelling northbound on Norwalk Boulevard and ran a red light (per witnesses). A Magnum and a Taurus were beginning to travel westbound on Centralia as the light turned green. The Magnum driver looked before proceeding, saw the Yukon driver run the red light and therefore did not proceed into the intersection on the'green flight (good defensive driver technique). The driver of the Taurus however did not see the Tahoe, because he was blinded by the Magnum, and continued to cross Norwalk Boulevard, clipping the passenger side rear wheel well of the Yukon. The Yukon spun out of control into the center turn lane of Norwalk Boulevard, obtained traction, and drifted toward the right into the driver door of the traffic control truck, perpendicular to the direction of traffic (a site plan depicting the incident is shown in the first figure found below). Traffic control was being set up at the time of the incident (around.`noon). The cones that were set up at the time of the incident are delineated on the attached figure. Traffic control signs and cones were set up both north and south of the intersection per the Watch Manual and approved traffic control plan. The traffic control person was setting up'cones next to the Stantec vehicle when the collision occurred. The traffic control person was facing backwards (toward oncoming traffic and the accident) while setting up the cones. The traffic control person saw the accident as it was occurring and ran out of the roadway. The Stantec employee was in his vehicle north of the traffic control vehicle when the incident occurred. The traffic control truck was parked between the well to be monitored (work zone) and the oncoming traffic. A lighted traffic control light board was attached to the traffic control truck at the time of the incident. Photos of this accident can be found below. This type of incident is very hazardous because, although an accident can be anticipated, the nature of what actually occurs during the accident can not be accurately predicted; therefore, there are no proper safety precautions that will remove an i6dividual from harm's way. Please note the proximity of the groundwater monitoring well located in the picture found below (approximately three to four feet) from the accident. If the technician was performing work at this well at a slightly different time, there could have been a 7 serious injury. Given the uncontrollable nature of the risk, the most feasible solution to minimize the potential harm to workers is to either minimize the frequency of performing the'work or remove the work altogether.