Rescue and Traffic 53 responded to this motor vehicle accident reported with entrapment at Old Marple & Sproul Roads, Marple Twp this morning. First arriving units located a sedan sitting below grade in the retention pit adjacent to the Aqua water storage tank. Those involved were transported to an area trauma center by EMS and the roadway was closed for a short time till the vehicle could be removed. The cause of the accident is under investigation by Marple Twp. Police.