This is more commonly known as a Red-P lab. Although rare where I live, we've had a few. This particular lab will give you some clues as to what you have. If you walk into one of these clandestine labs you may see the chemistry lab set: triple neck flasks, beakers and the like. You may also see boxes of match books. With this clandestine lab it is important that you recognize the dangers. If you turn the power off to any reaction vessel you have the potential to turn the red phosphorous into white phosphorous which becomes highly explosive. There is also a by-product gas that can cause death almost instantly called phosphine. If you're working one of these labs it's important to be in on SCBA. During a Red-P clandestine lab I worked several years ago I was able to take a small portion of the air filter in the furnace and send that to our state lab for analysis. The filter portion came back with a positive for methamphetamine, marijuana and nicotine. This was more important due to the fact the suspects' kids were present and we were making a case for social services.
Regardless of which type of lab you are working, officers and detectives need to take all measures in protecting themselves. We often concern ourselves with others' safety and not our own. It's important to have a decontamination process in place for you, suspects and children. It's also a great idea to get with your local first responders and develop response plans.