Here is the document prepared to use n-Pentane in clean room.

Word: drupal.star.bnl.gov/STAR/system/files/n-Pentane_procedure_v1.docx

PDF: drupal.star.bnl.gov/STAR/system/files/n-Pentane_procedure_v1.pdf

This procedure is simplified version of what is used in McGill to test sTGC chambers:

And also from what I have received from Alexei (this is a schematics made at Russia for ATLAS test station):

drupal.star.bnl.gov/STAR/system/files/ATLAS_sTGC.pdf