HEPA air shutdown 3/25 0600-1200

Dick Crane rcrane at snf.stanford.edu
Thu Mar 20 16:48:32 PST 2003

Tylan1-4, wbgaas and ag4108 users,

Last Tuesday's HEPA air shutdown did not occur and has been rescheduled
for Tuesday, March 25, from 0630 to 1200.

HEPA air to tylan, bank 1 furnaces (tylan1-4), wbgaas and the ag4108
will interrupted while facilities installs a new variable speed drive
controller for the
transfer fan which supplies this area. HEPA air flow will be reduced to
make-up air flow only (about 10-20% of normal flow). The wet bench
exhaust flow will not be affected by this action. Users with a high
sensitivity to particle contamination are advised to not load or unload
furnaces during the shutdown time.

Thanks for your help and patience,


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