Abstract: At 11:30 a.m. on March 23, 2004, Employee #1, a technician employed by SPX Valves and Controls, was found dead at a job site where he had been performing a job for Calleguas Water District, the host employer. Employee #1 had been assigned to repair a leaking 48-in. butterfly valve within an inlet/outlet piping system for Grimes Canyon Reservoir. He was escorted to the job site by the host employer and was left unattended until a coworker was sent to inspect the progress of his work. Employee #1's supervisor had not spoken to him for 2 to 3 weeks. The coworker found Employee #1 unconscious, face down, and halfway out of the pipe. The cause of death was determined by the county coroner as natural. The work area was designated by the host employer as a confined space.