sounds like the best thing to do, if it matters to you, is to call around and ask.
FWIW, most people consider gas to be either O2-clean or not. I'm fairly sure, that this is going to be equivalent to what they are trying to mean by labelling "ANDI ultrapurified safeair", but I can't say for sure. O2-clean (which is more stringent than grade-E, that much I know) basically means there are essentially no trace hydrocarbons present, and goes far beyond what is considered "safe to breathe". It's more an issue of avoiding a hazard when partial-pressure blending with high-concentrations of O2.
Bamboo is almost certainly going to be pumping O2-clean gas. Anywater Sports in San Jose is another good shop that pumps lots of gas around here. Anything coming out of there (AWS) is going to be clean.