There was a discussion (Dennis, John, Michael L., Bubba, myself) after morning meeting wrt how many post-work FTIR samples should be taken in this chamber. Since there are several questions related to the possible contamination in both HAM 11 and 12, we have asked the VRB to make a determination of what will be required to go forward. In the meantime, the crew finished the balance of the work in HAM 12 (with the exception of post-work FTIRs)and began replacing doors. One door went back on today and the other will go back on tomorrow. When the chamber is re-entered for FTIRs, it will be through the door blank at the west end.