Jean Dasch: A Closer Look
(See Projects story on Measuring
Fine Particles.)
What part of the
world are you from?
New Jersey.
Most people don't have a good impression
of New Jersey
I know they don't, but New Jersey is the Garden State. I come
from South Jersey and it really is gardenlike there. I think
most people see the turnpike and North Jersey and think that's
the whole state. Still, Michigan is far more beautiful.
How did you get interested in your field
of study/research?
A beloved high school teacher showed me the joys of chemistry.
It's funny because later he dropped chemistry and became a
psychologist. A beloved grad school prof moved me toward environmental
studies. In both cases, I enjoyed the teachers almost more
than the subject.
How did you end up at R&D?
My grad school prof recommended GM. Two of my schoolmates
were already working at R&D.
What were your early assignments?
Initially I studied acid rain, which was a carryover from
graduate research, plus emissions from brake pads and from
woodburning fireplaces. That last one was an odd project.
When I came to GM in 1979, we had a mobile
lab group that went to a different site each summer to investigate
emissions related to vehicles. At that time, they were studying
the Denver "Brown Cloud." Denver had a smoggy brown
haze that obscured the mountains, and automobiles received
the blame. But someone had a theory that the cloud actually
resulted form woodburning fireplaces. So I measured emissions
from a woodburning fireplace, a furnace, and a hot water heater.
When we put the whole picture together for Denver, we discovered
that woodburning was a major part of the air pollution problem
there.
[Editor's note: Denver was the
first major metropolitan area to ban the construction of new
wood-burning fireplaces. Additional control measures in Denver
and surrounding mountain communities in effect today include
innovative wood-burning controls.]
What are you working on presently?
We're studying emissions from welding and machining as a follow-up
to our investigation into fine particles from automotive manufacturing
processes. I'm also working on developing tool coatings to
enable dry machining.
That sounds like a daunting task
It is. We're aware of the problems involved with machining
fluids high cost, infrastructure needed to transfer
them, environmental and health issues but they sure
work well. Trying to machine dry with coatings only has been
a big challenge. Other researchers who are knowledgeable about
coatings are also involved in the project.
We've been pretty successful, but I don't
know if we can reach the levels necessary for manufacturing.
We started with uncoated drills and determined the number
of holes we can drill; with new coatings we've increased that
number by two orders of magnitude, but it's still not good
enough. We're not quite ready to quit yet, however.
What excites you about your research?
I enjoy taking a lot of experimental data and trying to find
a pattern or a trend or, better still, one of those rare "Eureka"
moments.
What are you most proud of?
I'm proud of the breadth of research studies I've been involved
in at R&D from auto emissions to manufacturing
issues to groundwater cleanup to acid rain. The groundwater
cleanup project, for instance, involved the Willow Run Assembly
Plant, which is now closed. The plant had a tank farm in the
ground that held vehicle fluids, like gasoline, motor oil,
and hydraulic and brake fluids. Over time, some of the tanks
leaked.
We set up an enormous system to pull water
out of the ground and put air through the soil to volatilize
substances like ethylene. We also used bioremediation: by
putting air through, we could get the microbes working to
eat up the contaminants. I really enjoyed that project.
What is your work like life?
Most days find me in front of the computer working on data
or writing papers or helping to direct research projects.
What do you do when you're not
working?
I have two kids in middle school and they take all of my non-GM
time. It is a constant challenge to not cheat my kids or GM
out of their due. Unfortunately, the needs of my husband and
myself are so far on the back burner that we've fallen off
the stove.
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