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Or as in the poster above you... seriously expensive rental options!
Originally Posted by Chrisch
You really should never have to shot blast a tank, if you do, you need to go and kick either the compressor owner or operator in the bollocks, as that is either wet gas that's likely to kill you (by whatever other nasties have desorbed out of the filters as the water has pushed it out) or somebody didn't blow the seawater remnants out of the valve before starting filling.