I worked for the Public Utilities company last summer, and we were tasked with taking inventory around the entire city, of all the transformers. We wrote down as much info as we could about the transformers, including Serial Number and whether or not it contained PCP's. From what I understood, the PCP-containing transformers would be replaced with non-PCP transformers. What is this PCP chemical? Is it dangerous? What purpose did it serve in the transformer if it could replaced with the non-PCP transformers? I want to know more about this information so I can effectively communicate exactly what we were doing last summer in a job interview if anyone asks. Thanks so much for any information!