I have a Chiller at work the first compressor is trashed, R22 recovered. Second circuit needs Top end kit and all the R22 was recovered by contractor and removed from site. Was given a signed work order today, to put the circuit back on. I've C.M.A, on what could happen and the bean counters are taking responsiblity. The work order said to put the old refrigerant back in the chiller. Which got me thinking. Seems there was an EPA rule that you could put recovered refrigerant in a unit if it was from the same job site. Would hate to put new R22 in this machine. Looked on EPA's site and couldn't find that particular rule. PS They emailed me, that they are replacing the chiller this year.