As stated previously, we are having issues with the ultrapure water coming back into spec.  Currently we are operating at 15.4 megohm resistivity (18.2 is theoretical, where we usually operate).  TOC is operating at 1ppB, while we normally operate at 225 ppT.  This means that we have slightly higher organic levels in the water and quite a few more ionic impurities.  The quality is continually improving, and we will let you know when the quality is back where it belongs.

It is perfectly acceptable to perform non-sensitive operations with this water.  FOR THIS REASON, WE ARE NOW OPENING ALL ACID HOODS FOR NORMAL OPERATION.  The facility is now fully operational, with the understanding that our water quality is not yet back to our normal, specified levels.

Thank you for your understanding and cooperation as we work through this issue.

John Weaver

John R. Weaver

Facility Manager

Birck Nanotechnology Center

Purdue University

(765) 494-5494

jrweaver@purdue.edu