Document gEJ9Rrxq2MVrxwGeVgJ2j9Z5N

TO: Dave Penny 70 jet ERT: Mte: &: RF XF: rot1 ^ Interoffice Communication FROM: DATE: SUBJ: T. G. Grumbles December 28, 1990 Ventilation Velocities for Alumina Dust VISTA Below is the one Q&A I had as a follow-up to our LCCP Alumina presentation. Can you add this one to your document and then send it all to me for review? We need to get this done soon. The plant was asking about it last week. Q.) Will standard chemical fume hoods control Alumina dust emissions? A.) Yes. Based on the physical properties of our Alumina, and the low toxicity of the particulate, a face velocity of approxi mately 100 fpm would be recommended for hoods handling alumina. The chemical fume hoods in the LCCP laboratory are generally capable of maintaining this velocity. T. G. Grumbles dlj VVV 000011604