hugh.radkins@LIGO.ORG - posted 11:24, Monday 25 February 2013 (5572)
LHO LVEA HEPI Piping Valves Closed for leak checks
Lost about a PSI over the weekend and have been unable to find any leaks since Tuesday. I have again shut all the valves I can, except those leading to BSC3, to help locate the problem area.