At about 7 a.m. every day from early April through the first hard frost of fall, lab technician Vincent Leonforte climbs a narrow steel ladder to go through a hatch and onto the roof of the Winnebago County Health Department.
In addition to taking in a sweeping view of Rockford’s west side, Leonforte, removes two approximately one-inch long, silicon-coated acrylic rods from a device called a Rotorod Sampler that has been spinning them for one minute of every 11 minutes at a blurring 2,400 rpm to catch whatever was in the air for the past 24 hours. Then he loads in two more rods.
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