Hi all, Our small research lab recently has been investigated by a very aggressive environmental health and safety inspector, and she asked us to write up the standard of practice for any chemicals that we re-use, including all the chemicals we re-use for deparaffinization and dehydration and rehydration of slides. We currently keep a few bottles of xylene and graded ethanol that we dispense into staining racks used for deparaffinizing and rehydration of sections. We pour the bottles back into their containers once we're done with them and reuse them until it has a lot of paraffin detritus in it. We do this all by hand.
EH&S wants us to do the following: If a container is labeled "in process" or "recycled" be sure to have an SOP written up describing what is being done and what is meant by "recycled" (in this case a solution is being used again). Be sure to say at what point the solution is waste and then how it is managed after that (properly labeled and disposed). Don't label containers “waste” or “used” unless it is labeled with a properly filled out yellow hazardous waste sticker provided by EH&S. I have no idea what they're looking for, but they've gotten quite strict in enforcing all sorts of vague regulations. Any suggestions are welcome. Thanks, Adam _______________________________________________ Histonet mailing list Histonet@lists.utsouthwestern.edu http://lists.utsouthwestern.edu/mailman/listinfo/histonet