This was one of two photographs (see PHIL 22758), which were taken during two different confined space entries at NIOSH Alice Hamilton Labs, located in Cincinnati, Ohio. Here, a plumbing subcontractor was preparing to enter a confined space, in order to perform preventative maintenance. Outside the frame of this image, air monitoring was being conducted by Brad Knipper, an EHS team member and Certified Industrial Hygienist (CIH). The space was being ventilated, and a safety retrieval device was in place. A trained attendant was seen providing the entry worker a cable, as he entered the confined space.