Round 2: Tossup 3

The Class 10000 ISO7 (“I-S-O-seven”) standard for these facilities requires an ACH (“A-C-H”) of an inverse minute. While at Sandia National Lab, Willis Whitfield pioneered usage of laminar flow in these facilities. (-5[1])Clair Cameron Patterson effectively turned his lab into one of these facilities (10[1])while trying to date the Earth. In the (10[1])“recirculating” class of these facilities, flow is drawn (10[1])into the ceiling plenum (10[1])before being passed through a HEPA (“HEP-uh”) system. (-5[1])NASA’s Goddard Spaceflight Center has the world’s largest one of these facilities (-5[1])where assembly of sensitive equipment occurs. (10[1]-5[1])Semiconductor (10[1])fabs contain these tightly controlled facilities where integrated circuit manufacture occurs. (10[1])For 10 points, people must take an “air shower” before (-5[1])entering what spaces with very low airborne particulate concentrations? (10[1])■END■ (10[1]0[1])

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